CA2906119A1 - Compositions and methods for modulating tau expression - Google Patents

Abstract

Disclosed are methods for modulating splicing of Tau mRNA in an animal with Tau antisense compounds. Also disclosed herein are methods for reducing expression of Tau mRNA and protein in an animal with Tau antisense compounds. Such compounds and methods are useful to treat, prevent, or ameliorate neurodegenerative diseases in an individual in need thereof. Examples of neurodegenerative diseases that can be treated, prevented, and ameliorated with the administration Tau antisense oligonucleotides include Alzheimer's Disease, Fronto-temporal Dementia (FTD), FTDP-17, Progressive Supranuclear Palsy, Chronic Traumatic Encephalopathy, Epilepsy, and Dravet's Syndrome.

Description

COMPOSITIONS AND METHODS FOR MODULATING TAU EXPRESSION
SEQUENCE LISTING
The present application is being filed along with a Sequence Listing in electronic format. The Sequence Listing is provided as a file entitled BIOL0220WOSEQ_5T25.txt created 3/14/2014, which is approximately 208 KB in size. The information in the electronic format of the sequence listing is incorporated herein by reference in its entirety.
BACKGROUND
1. Field Disclosed herein are compositions and methods related to the fields of antisense compounds biochemistry, molecular biology, and medicine. Embodiments described herein relate to compounds, compositions, and methods for treating, preventing, or ameliorating neurodegenerative diseases, including tauopathies, Alzheimer's Disease, Fronto-temporal Dementia (FTD), FTDP-17, Progressive Supranuclear Palsy (PSP), Chronic Traumatic Encephalopathy (CTE), Corticobasal Ganglionic Degeneration (CBD), Epilepsy, and Dravet's Syndrome by inhibiting expression of Tau or modulating the splicing of Tau in a cell and/or in an animal.

2. Description The primary function of Tau is to bind to and stabilize microtubules, which are important structural components of the cytoskeleton involved in mitosis, cytokinesis, and vesicular transport. Tau is found in multiple tissues, but is particularly abundant in axons of neurons. In humans, there are six isoforms of Tau that are generated by alternative splicing of exons 2, 3, and 10. Splicing of exons 2 and 3 at the N-terminus of the protein leads to inclusion of zero, one, or two 29 amino acid acidic domains and is termed ON, 1N, or 2N Tau respectively. The influence of these domains on Tau function is not fully clear, though may play a role in interactions with the plasma membrane. Inclusion of exon 10 at the C-terminus leads to inclusion of the microtubule binding domain encoded by exon 10. Since there are 3 microtubule binding domains elsewhere in Tau, this Tau isoform (with exon 10 included) is termed 4R Tau, where a' refers to the number of repeats of microtubule binding domains. Tau without exon 10 is termed 3R Tau. Since more microtubule binding domains (4R compared with 3R) increases the binding to microtubules, 4R Tau presumably significantly increases microtubule binding and assembly. The ratio of 3R/4R Tau is developmentally regulated, with fetal tissues expressing exclusively 3R Tau and adult human tissues expressing approximately equal levels of 3R/4R Tau. Deviations from the normal ratio of 3R/4R Tau are characteristic of neurodegenerative FTD Tauopathies. It is not known how changing the 3R/4R Tau ratio at a later stage in the adult animal will affect Tau pathogenesis.
Serine-threonine directed phosphorylation regulates the microtubule binding ability of Tau.
Hyperphosphorylation promotes detachment of Tau from microtubules. Other post translational modifications of Tau have been described; however the significance of these is unclear. Phosphorylation of Tau is also developmentally regulated with higher phosphorylation in fetal tissues and much lower phosphorylation in the adult. One characteristic of neurodegenerative disorders is aberrantly increased Tau phosphorylation.
The microtubule network is involved in many important processes within the cell including structural integrity needed for maintaining morphology of cells and operating transport machinery. Since binding of Tau to microtubules stabilizes microtubules, Tau is likely to be a key mediator of some of these processes and disruption of normal Tau in neurodegenerative diseases may disrupt some of these key cellular processes.
One of the early indicators that Tau may be important in neurodegenerative syndromes was the recognition that Tau is a key component of neurofibrillary inclusions in Alzheimer's disease. In fact, neurofibrillary inclusions are aggregates of hyperphosphorylated Tau protein.
Along with amyloid beta containing plaques, neurofibrillary inclusions are a hallmark of Alzheimer's disease and correlate significantly with cognitive impairment. 95% of Tau accumulations in AD are found in neuronal processes and is termed neuritic dystrophy. The process(es) whereby this microtubule associated protein becomes disengaged from microtubules and forms accumulations of proteins and how this relates to neuronal toxicity is not well understood.
Neuronal Tau inclusions are a pathological characteristic of not only Alzheimer's disease, but also a subset of Frontotemporal dementia (FTD), PSP, and CBD. The link between Tau and neurodegeneration was solidified by the discovery that mutations in the Tau gene cause a subset of FTD. These genetic data have also highlighted the importance of the 3R:4R ratio of Tau. Many of the Tau mutations that cause FTD
lead to a change in Tau splicing which leads to preferential inclusion of exon 10, and thus to increased 4R
Tau. The overall Tau levels are normal. Whether the Tau isoform change or the amino acid change or both cause neurodegeneration remains unknown. Recent data suggest that PSP may also be associated with an increased 4R:3R Tau ratio and thus may be amenable to a similar splicing strategy.
To help understand the influence of Tau ratios on neurodegeneration, a mouse model based on one of the splicing Tau mutations (N279K) has been generated using a minigene that includes the Tau promoter and the flanking intronic sequences of exon 10. As in humans, these mice demonstrate increased levels of 4R Tau compared with transgenics expressing WT Tau and develop behavioral and motor abnormalities as well as accumulations of aggregated Tau in the brain and spinal cord.
The protein "Tau" has been associated with multiple diseases of the brain including Alzheimer's disease, frontotemporal dementia, progressive supranuclear palsy, corticobasal ganglionic degeneration, dementia pugilistica, parkinsonism linked to chromosome, Lytico-Bodig disease, tangle-predominant dementia, ganglioglioma, gangliocytoma, meningioangiomatosis, subacute sclerosing panencephalitis, lead encephalopathy, tuberous sclerosis, Hallervorden-Spatz disease, Pick's disease, argyrophilic grain disease, corticobasal degeneration or frontotemporal lobar degeneration and others. Tau-associated disorders such as AD are the most common cause of dementia in the elderly. AD
affects an estimated 15 million people worldwide and 40% of the population above 85 years of age. AD
is characterized by two pathological hallmarks: Tau neurofibrillary inclusions (NFT) and amyloid-I3 (A13) plaques.
In seizure disorders, the brain's electrical activity is periodically disturbed, resulting in some degree of temporary brain dysfunction. Normal brain function requires an orderly, organized, coordinated discharge of electrical impulses. Electrical impulses enable the brain to communicate with the spinal cord, nerves, and muscles as well as within itself Seizures may result when the brain's electrical activity is disrupted. There are two basic types of seizures; epileptic and nonepileptic.
Epileptic seizures have no apparent cause or trigger and occur repeatedly. Nonepileptic seizures are triggered orprovoked by a disorder or another condition that irritates the brain. Certain mental disorders can cause seizure symptoms referred to as psychogenic nonepileptic seizures.
Alzheimer's Disease(AD) is known to be a clinical risk factor for late onset seizures. Multiple AD
mouse models recapitulate this increased seizure susceptibility. Within the last 5 years, many of these AD
models have been studied in the setting of mouse tau knockout (tau-/-).
Increased seizure susceptibility was ameliorated in these amyloid-depositing tau knockout lines. Further, tau-/-alone interestingly appeared to be protective against chemically induced seizures.
Anticonvulsants represent the common treatment regime for seizues. However, anticonvulsants are ineffective in a significant percent of people with a seizure disorder and for these individuals, surgery is the

3 only option. Amidst the lack of available treatments for seizure disorders and neurodegenerative diseases, certain methods of the present embodiments provide methods for treating, preventing or ameliorating a seizure disorder and neurodegenerative diseases by inhibiting expression of Tau or modulating the splicing of Tau in an animal.
SUMMARY
Provided herein are methods for modulating splicing of Tau mRNA in cells, tissues, and animals.
Also provided herein are methods for modulating the expression product of a Tau mRNA in cells, tissues, and animals.
In certain embodiments, modulation can occur in a cell or tissue. In certain embodiments, the cell or tissue is in an animal. In certain embodiments, the animal is human. In certain embodiments, Tau mRNA levels are reduced. In certain embodiments, Tau protein levels are reduced. In certain embodiments, splicing of Tau mRNA is modulated. In certain embodiments, the expression product of a Tau mRNA is modulated. In certain embodiments, exclusion of Tau exon 10 is promoted. In certain embodiments, expression of the 4R isoform of Tau RNA or protein is reduced. In certain embodiments, expression of the 3R isoform of Tau RNA or protein is increased. In certain embodiments, expression of the 4R isoform of Tau RNA or protein is reduced and expression of the 3R
isoform of Tau RNA or protein is increased. In certain embodiments, hyperphosphorylated Tau is reduced. Such reduction and modulation can occur in a time-dependent manner or in a dose-dependent manner.
Several embodiments are drawn to methods of reducing or decreasing one or more symptoms of a tau-associated disorder. In certain embodiments, the symptom is a seizure. In certain embodiments, the tau-associated disorder or neurodegenerative disorder is Alzheimer's disease, frontotemporal dementia, progressive supranuclear palsy, corticobasal ganglionic degeneration, dementia pugilistica, parkinsonism linked to chromosome, Lytico¨Bodig disease, tangle-predominant dementia, ganglioglioma, gangliocytoma, meningioangiomatosis, subacute sclerosing panencephalitis, lead encephalopathy, tuberous sclerosis, Hallervorden-Spatz disease, Pick's disease, argyrophilic grain disease, corticobasal degeneration or frontotemporal lobar degeneration. Certain embodiments are drawn to a method of decreasing seizures in a subject with a high 4R:3R tau isoform ratio. In certain embodiments, the methods comprise administering an antisense agent to the subject, wherein the agent decreases expression of tau or decreases the 4R:3R tau ratio in the central nervous system of the subject.
Also provided are methods useful for preventing, treating, and ameliorating diseases, disorders, and conditions associated with Tau. In certain embodiments, such diseases, disorders, and conditions associated with Tau are neurodegenerative diseases. In certain embodiments, the neurodegenerative

4 disease is any of Alzheimer's Disease, Fronto-temporal Dementia (FTD), FTDP-17, Progressive Supranuclear Palsy, Chronic Traumatic Encephalopathy, Epilepsy, or Dravet's Syndrome. In certain embodiments, one or more symptoms of a neurodegenerative disease is ameliorated, prevented, or delayed (progression slowed). In certain embodiments, the symptom is memory loss, anxiety, or loss of motor function. In certain embodiments, neurodegenerative function is improved. In certain embodiments, neurofibrillary inclusions are reduced.
Such diseases, disorders, and conditions can have one or more risk factors, causes, or outcomes in common. Certain risk factors and causes for development of a neurodegenerative disease include genetic predisposition and older age.
In certain embodiments, methods of treatment include administering a Tau antisense compound to an individual in need thereof The antisense compound may inhibit expression of Tau or modulate splicing of Tau. In certain embodiments, the antisense compound is a single-stranded antisense oligonucleotide.
In certain embodiments, the single-stranded antisense oligonucleotide is complementary to a Tau nucleic acid.
In certain embodiments, the present invention provides compounds comprising oligonucleotides.
In certain embodiments, such oligonucleotides are complementary to a Tau transcript. In certain such embodiments, oligonucleotides are complementary to a target region of the Tau transcript comprising exon 10. In certain such embodiments, oligonucleotides are complementary to a target region of the Tau transcript comprising an intron adjacent to exon 10. In certain such embodiments, oligonucleotides are complementary to a target region of the Tau transcript comprising an intron adjacent to exon 10 and downstream of exon 10. In certain such embodiments, oligonucleotides are complementary to a target region of the Tau transcript comprising an intron adjacent to exon 10 and upstream of exon 10. In certain embodiments, the Tau transcript comprises an exonic splice silencer for exon 10. In certain embodiments, oligonucleotides inhibit inclusion of exon 10. In certain embodiments, oligonucleotides promote skipping of exon 10. In certain such embodiments, 3R Tau mRNA is increased. In certain such embodiments, Tau mRNA with exon 10 mRNA is decreased. In certain embodiments, the 4R isoform of the Tau protein is decreased. In certain embodiments, the 3R isoform of the Tau protein is increased.
In certain embodiments, including, but not limited to any of the above numbered embodiments, the Tau transcript is in a human. In certain embodiments, including, but not limited to any of the above numbered embodiments, the Tau transcript is in a mouse.
The present disclosure provides the following non-limiting numbered embodiments:

5

6 Embodiment 1. A compound comprising a modified oligonucleotide consisting of 8 to 30 linked nucleosides and having a nucleobase sequence comprising a complementary region comprising at least 8 contiguous nucleobases complementary to a target region of equal length of a Tau transcript.
Embodiment 2. The compound of embodiment 1, wherein the complementary region of the modified oligonucleotide is 100% complementary to the target region.
Embodiment 3. The compound of embodiment 1 or 2, wherein the complementary region of the nucleobase sequence of the modified oligonucleotide comprises at least 10 contiguous nucleobases.
Embodiment 4. The compound of embodiment 1 or 2, wherein the complementary region of the nucleobase sequence of the modified oligonucleotide comprises at least 15 contiguous nucleobases.
Embodiment 5. The compound of embodiment 1 or 2, wherein the complementary region of the nucleobase sequence of the modified oligonucleotide comprises at least 18 contiguous nucleobases.
Embodiment 6. The compound of any of embodiments 1-5, wherein the nucleobase sequence of the modified oligonucleotide is at least 80% complementary to an equal-length region of the Tau transcript, as measured over the entire length of the oligonucleotide.
Embodiment 7. The compound of any of embodiments 1-5, wherein the nucleobase sequence of the modified oligonucleotide is at least 90% complementary to an equal-length region of the Tau transcript, as measured over the entire length of the oligonucleotide.
Embodiment 8. The compound of any of embodiments 1-5, wherein the nucleobase sequence of the modified oligonucleotide is 100% complementary to an equal-length region of the Tau transcript, as measured over the entire length of the oligonucleotide.
Embodiment 9. The compound of any of embodiments 1-8, wherein the target region is within exon 10 of the Tau transcript.
Embodiment 10. The compound of any of embodiments 1-8, wherein the target region is within intron 9 of the Tau transcript.

Embodiment 11. The compound of any of embodiments 1-8, wherein the target region is within intron 10 of the Tau transcript.
Embodiment 12. The compound of any of embodiments 1-8, wherein the target region comprises a portion of intron 9 and a portion of exon 10.
Embodiment 13. The compound of any of embodiments 1-8, wherein the target region comprises a portion of exon 10 and a portion of intron 10.
Embodiment 14. The compound of any of embodiments 1-8, wherein the target region comprises a portion of exon 10 and a portion of the intron at the 5'-end of exon 10.
Embodiment 15. The compound of any of embodiments 1-8, wherein the target region comprises a portion of exon 10 and a portion of the intron at the 3'-end of exon 10.
Embodiment 16. The compound of any of embodiments 1-15, wherein the target region is within nucleobase 121708 and nucleobase 122044 of SEQ ID NO.: 1.
Embodiment 17. The compound of any of embodiments 1-9, wherein the target region is within nucleobase 121796 and nucleobase 122044 of SEQ ID NO.: 1.
Embodiment 18. The compound of any of embodiments 1-9, wherein the target region is within nucleobase 121796 and nucleobase 121885 of SEQ ID NO.: 1.
Embodiment 19. The compound of any of embodiments 1-9, wherein the target region is within nucleobase 121873 and nucleobase 121898 of SEQ ID NO.: 1.
Embodiment 20. The compound of any of embodiments 1-9, wherein the target region is within nucleobase 121869 and nucleobase 121943 of SEQ ID NO.: 1.
Embodiment 21. The compound of any of embodiments 1-9, wherein the target region is within nucleobase 122020 and nucleobase 122044 of SEQ ID NO.: 1.

7 Embodiment 22. The compound of any of embodiments 1-9, wherein the target region is within nucleobase 121881 and nucleobase 121898 of SEQ ID NO.: 1.
Embodiment 23. The compound of any of embodiments 1-9, wherein the target region is within nucleobase 121880 and nucleobase 121897 of SEQ ID NO.: 1.
Embodiment 24. The compound of any of embodiments 1-9, wherein the target region is within nucleobase 121879 and nucleobase 121896 of SEQ ID NO.: 1.
Embodiment 25. The compound of any of embodiments 1-9, wherein the target region is within nucleobase 121878 and nucleobase 121895 of SEQ ID NO.: 1.
Embodiment 26. The compound of any of embodiments 1-9, wherein the target region is within nucleobase 121877 and nucleobase 121894 of SEQ ID NO.: 1.
Embodiment 27. The compound of any of embodiments 1-9, wherein the target region is within nucleobase 121876 and nucleobase 121893 of SEQ ID NO.: 1.
Embodiment 28. The compound of any of embodiments 1-9, wherein the target region is within nucleobase 121875 and nucleobase 121892 of SEQ ID NO.: 1.
Embodiment 29. The compound of any of embodiments 1-9, wherein the target region is within nucleobase 121874 and nucleobase 121891 of SEQ ID NO.: 1.
Embodiment 30. The compound of any of embodiments 1-9, wherein the target region is within nucleobase 121873 and nucleobase 121890 of SEQ ID NO.: 1.
Embodiment 31. The compound of any of embodiments 1-15, wherein the nucleobase sequence of the modified oligonucleotide comprises the nucleobase sequence of any of SEQ
ID NOs: 8-200.
Embodiment 32. The compound of any of embodiments 1-15, wherein the nucleobase sequence of the modified oligonucleotide consists of the nucleobase sequence of any of SEQ
ID NOs: 8-200.

8 Embodiment 33. The compound of any of embodiments 1-15, wherein the nucleobase sequence of the modified oligonucleotide comprises the nucleobase sequence of any of SEQ
ID NOs: 33, 34, 147, 148, 149, 150, 151, 152, or 153.
Embodiment 34. The compound of any of embodiments 1-15, wherein the nucleobase sequence of the modified oligonucleotide consists of the nucleobase sequence of any of SEQ
ID NOs: 33, 34, 147, 148, 149, 150, 151, 152, or 153.
Embodiment 35. The compound of any of embodiments 1-15, wherein the nucleobase sequence of the modified oligonucleotide comprises the nucleobase sequence of any of SEQ
ID NOs: 31, 33, 34, 35, 36, 37, 45, 72, 79, 82, 83, 97, 106, 107, 112, 113, 130, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 157, 158, 160, or 200.
Embodiment 36. The compound of any of embodiments 1-15, wherein the nucleobase sequence of the modified oligonucleotide consists of the nucleobase sequence of any of SEQ
ID NOs: 31, 33, 34, 35, 36, 37, 45, 72, 79, 82, 83, 97, 106, 107, 112, 113, 130, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 157, 158, 160, or 200.
Embodiment 37. The compound of any of embodiments 1-36, wherein the modified oligonucleotide comprises at least one modified nucleoside.
Embodiment 38. The compound of embodiment 37, wherein at least one modified nucleoside comprises a modified sugar moiety.
Embodiment 39. The compound of embodiment 37, wherein at least one modified sugar moiety is a 2'-substituted sugar moiety.
Embodiment 40. The compound of embodiment 39, wherein the 2'-substitutent of at least one 2'-substituted sugar moiety is selected from among: 2'-0Me, 2'-F, and 2'-M0E.
Embodiment 41. The compound of embodiment 39, wherein the 2'-substiuent of at least one 2'-substituted sugar moiety is a 2'-M0E.

9 Embodiment 42. The compound of any of embodiments 37-38, wherein at least one modified sugar moiety is a bicyclic sugar moiety.
Embodiment 43. The compound of embodiment 42, wherein at least one bicyclic sugar moiety is LNA or cEt.
Embodiment 44. The compound of any of embodiments 37-43, wherein at least one sugar moiety is a sugar surrogate.
Embodiment 45. The compound of embodiment 44, wherein at least one sugar surrogate is a morpholino.
Embodiment 46. The compound of embodiment 44, wherein at least one sugar surrogate is a modified morpholino.
Embodiment 47. The compound of any of embodiment 1-46, wherein the modified oligonucleotide comprises at least 5 modified nucleosides, each independently comprising a modified sugar moiety.
Embodiment 48. The compound of embodiment 47, wherein the modified oligonucleotide comprises at least 10 modified nucleosides, each independently comprising a modified sugar moiety.
Embodiment 49. The compound of embodiment 47, wherein the modified oligonucleotide comprises at least 15 modified nucleosides, each independently comprising a modified sugar moiety.
Embodiment 50. The compound of embodiment 47, wherein each nucleoside of the modified oligonucleotide is a modified nucleoside and each independently comprises a modified sugar moiety, wherein the modified sugar moieties of each modified nucleosides are each the same as one another.
Embodiment 51. The compound of embodiment 47, wherein each nucleoside of the modified oligonucleotide is a modified nucleoside, each independently comprising a modified sugar moiety.
Embodiment 52. The compound of any of embodiments 1-51, wherein the modified oligonucleotide comprises at least two modified nucleosides comprising modified sugar moieties that are the same as one another.

Embodiment 53. The compound of any of embodiments 1-52, wherein the modified oligonucleotide comprises at least two modified nucleosides comprising modified sugar moieties that are different from one another.
Embodiment 54. The compound of any of embodiments 1-53, wherein the modified oligonucleotide comprises a modified region comprising at least 5 contiguous modified nucleosides.
Embodiment 55. The compound of embodiment 54, wherein the modified oligonucleotide comprises a modified region comprising at least 10 contiguous modified nucleosides.
Embodiment 56. The compound of embodiment 54, wherein the modified oligonucleotide comprises a modified region comprising at least 15 contiguous modified nucleosides.
Embodiment 57. The compound of embodiment 54, wherein the modified oligonucleotide comprises a modified region comprising at least 18 contiguous modified nucleosides.
Embodiment 58. The compound of embodiment 54, wherein the modified oligonucleotide comprises a modified region comprising at least 20 contiguous modified nucleosides.
Embodiment 59. The compound of any of embodiments 53-58, wherein each modified nucleoside of the modified region has a modified sugar moiety independently selected from among: 2'-F, 2'-0Me, 2'-M0E, cEt, LNA, morpholino, and modified morpholino.
Embodiment 60. The compound of any of embodiments 54-59, wherein the modified nucleosides of the modified region each comprise the same modification as one another.
Embodiment 61. The compound of embodiment 60, wherein the modified nucleosides of the modified region each comprise the same 2'-substituted sugar moiety.
Embodiment 62. The compound of embodiment 61, wherein the 2'-substituted sugar moiety of the modified nucleosides of the region of modified nucleosides is selected from 2'-F, 2'-0Me, and 2'-M0E.

Embodiment 63. The compound of embodiment 61, wherein the 2'-substituted sugar moiety of the modified nucleosides of the region of modified nucleosides is 2W0E.
Embodiment 64. The compound of embodiment 59, wherein the modified nucleosides of the region of modified nucleosides each comprise the same bicyclic sugar moiety.
Embodiment 65. The compound of embodiment 64, wherein the bicyclic sugar moiety of the modified nucleosides of the region of modified nucleosides is selected from LNA and cEt.
Embodiment 66. The compound of embodiment 59, wherein the modified nucleosides of the region of modified nucleosides each comprises a sugar surrogate.
Embodiment 67. The compound of embodiment 66, wherein the sugar surrogate of the modified nucleosides of the region of modified nucleosides is a morpholino.
Embodiment 68. The compound of embodiment 66, wherein the sugar surrogate of the modified nucleosides of the region of modified nucleosides is a modified morpholino.
Embodiment 69. The compound of any of embodiments 1-68, wherein the modified nucleotide comprises no more than 4 contiguous naturally occurring nucleosides.
Embodiment 70. The compound of any of embodiments 1-68, wherein each nucleoside of the modified oligonucleotide is a modified nucleoside.
Embodiment 71. The compound of embodiment 70 wherein each modified nucleoside comprises a modified sugar moiety.
Embodiment 72. The compound of embodiment 71, wherein the modified nucleosides of the modified oligonucleotide comprise the same modification as one another.
Embodiment 73. The compound of embodiment 72, wherein the modified nucleosides of the modified oligonucleotide each comprise the same 2'-substituted sugar moiety.

Embodiment 74. The compound of embodiment 73, wherein the 2'-substituted sugar moiety of the modified oligonucleotide is selected from 2'-F, 2'-0Me, and 2'-M0E.
Embodiment 75. The compound of embodiment 74, wherein the 2'-substituted sugar moiety of the modified oligonucleotide is 2'-M0E.
Embodiment 76. The compound of embodiment 72, wherein the modified nucleosides of the modified oligonucleotide each comprise the same bicyclic sugar moiety.
Embodiment 77. The compound of embodiment 76, wherein the bicyclic sugar moiety of the modified oligonucleotide is selected from LNA and cEt.
Embodiment 78. The compound of embodiment 72, wherein the modified nucleosides of the modified oligonucleotide each comprises a sugar surrogate.
Embodiment 79. The compound of embodiment 78, wherein the sugar surrogate of the modified oligonucleotide is a morpholino.
Embodiment 80. The compound of embodiment 78, wherein the sugar surrogate of the modified oligonucleotide is a modified morpholino.
Embodiment 81. The compound of any of embodiments 1 to 36, wherein the modified oligonucleotide has an A-B2-A- B2- A-B2-A- B2-A-B2-A-B2-A2 motif, wherein each A comprises a bicylic sugar moiety, and wherein each B is selected from a 2'-substituted sugar moiety and an unmodified 2'-deoxy sugar moiety.
Embodiment 82. The compound of embodiment 81, wherein each A is a cEt sugar moiety.
Embodiment 83. The compound of embodiment 81, wherein each A is an LNA
sugar moiety.
Embodiment 84. The compound of any of embodiments 81 to 83, wherein each B is an unmodified 2'-deoxy sugar moiety.
Embodiment 85. The compound of any of embodiments 81 to 83, wherein each B is 2'-MOE
sugar moiety.

Embodiment 86. The compound of any of embodiments 1-85, wherein the modified oligonucleotide comprises at least one modified internucleoside linkage.
Embodiment 87. The compound of embodiment 86, wherein each internucleoside linkage is a modified internucleoside linkage.
Embodiment 88. The compound of embodiment 86 or 87, comprising at least one phosphoro-thioate internucleoside linkage.
Embodiment 89. The compound of any of embodiments 1-85, wherein each internucleoside linkage is a modified internucleoside linkage and wherein each internucleoside linkage comprises the same modification.
Embodiment 90. The compound of embodiment 89, wherein each internucleoside linkage is a phosphorothioate internucleoside linkage.
Embodiment 91. The compound of embodiment 86, wherein the modified oligonucleotide comprises 4 phosphodiester internucleoside linkages.
Embodiment 92. The compound of embodiment 86, wherein the modified oligonucleotide comprises 5 phosphodiester internucleoside linkages.
Embodiment 93. The compound of embodiment 86, wherein the modified oligonucleotide comprises 6 phosphodiester internucleoside linkages.
Embodiment 94. The compound of embodiment 86, wherein the modified oligonucleotide comprises 7 phosphodiester internucleoside linkages.
Embodiment 95. The compound of any of embodiments 91 to 94, wherein each remaining internucleoside linkage is a phosphodiester internucleoside linkage.
Embodiment 96. The compound of any of embodiments 1-85, wherein the compound has an NsNsNoNsNoNsNoNsNoNsNoNsNoNsNoNsNsN internucleoside linkage motif, wherein each N

represents a nucleoside, each S represents a phosphorothioate internucleoside linkage, and each 0 represents a phosphodiester internucleoside linkage.
Embodiment 97. The compound of any of embodiments 1-85, wherein the compound has an NsNoNoNoNsNsNsNsNsNsNsNsNoNoNoNsNsN internucleoside linkage motif, wherein each N
represents a nucleoside, each S represents a phosphorothioate internucleoside linkage, and each 0 represents a phosphodiester internucleoside linkage.
Embodiment 98. The compound of any of embodiments 1-97 comprising at least one conjugate.
Embodiment 99. The compound of any of embodiments 1-98 consisting of the modified oligonucleotide.
Embodiment 100. The compound of any of embodiments 1-99, wherein the compound modulates splicing of the Tau transcript.
Embodiment 101. The compound of any of embodiments 1-99, wherein the compound decreases expression of the 4R Tau isoform.
Embodiment 102. The compound of any of embodiments 1-99, wherein the compound decreases expression Tau mRNA comprising exon 10.
Embodiment 103. The compound of any of embodiments 1-99, wherein the compound decreases expression Tau protein comprising amino acids encoded from exon 10 mRNA.
Embodiment 104. The compound of any of embodiments 1-8 or 30-103, having a nucleobase sequence comprising any of the sequences as set forth in SEQ ID NOs. 8-200.
Embodiment 105. The compound of any of embodiments 1-8 or 30-103, having a nucleobase sequence comprising any of the sequences as set forth in SEQ ID NOs. 33, 34, 147, 148, 149, 150, 151, 152, or 153.
Embodiment 106. The compound of any of embodiments 1-8 or 30-103, having a nucleobase sequence consisting of any of the sequences as set forth in SEQ ID NOs. 8-200.

Embodiment 107. The compound of any of embodiments 1-8 or 30-103, having a nucleobase sequence consisting of any of the sequences as set forth in SEQ ID NOs. 33, 34, 147, 148, 149, 150, 151, 152, or 153.
Embodiment 108. A double stranded compound comprising the compound of any of embodiments 1-107.
Embodiment 109. A compound consisting of ISIS 670011.
Embodiment 110. A compound consisting of ISIS 670012.
Embodiment 111. A compound consisting of ISIS 670013.
Embodiment 112. A compound consisting of ISIS 670014.
Embodiment 113. A compound consisting of ISIS 670015.
Embodiment 114. A compound consisting of ISIS 670016.
Embodiment 115. A compound consisting of ISIS 670017.
Embodiment 116. A compound consisting of ISIS 670018.
Embodiment 117. A compound consisting of ISIS 670019.
Embodiment 118. A compound consisting of ISIS 670020.
Embodiment 119. A compound consisting of ISIS 670021.
Embodiment 120. A compound consisting of ISIS 670022.
Embodiment 121. A compound consisting of ISIS 670023.
Embodiment 122. A compound consisting of ISIS 670024.
Embodiment 123. A compound consisting of ISIS 670025.
Embodiment 124. A compound consisting of ISIS 670026.
Embodiment 125. A compound consisting of ISIS 670027.

Embodiment 126. A compound consisting of ISIS 670028.
Embodiment 127. A compound consisting of ISIS 678329.
Embodiment 128. A compound consisting of ISIS 678330.
Embodiment 129. A compound consisting of ISIS 678331.
Embodiment 130. A compound consisting of ISIS 678332.
Embodiment 131. A compound consisting of ISIS 678333.
Embodiment 132. A compound consisting of ISIS 678334.
Embodiment 133. A compound consisting of ISIS 693840.
Embodiment 134. A compound consisting of ISIS 693841.
Embodiment 135. A compound consisting of ISIS 693842.
Embodiment 136. A compound consisting of ISIS 693843.
Embodiment 137. A compound consisting of ISIS 693844.
Embodiment 138. A compound consisting of ISIS 693845.
Embodiment 139. A compound consisting of ISIS 693846.
Embodiment 140. A compound consisting of ISIS 693847.
Embodiment 141. A compound consisting of ISIS 693848.
Embodiment 142. A compound consisting of ISIS 693849.
Embodiment 143. A compound consisting of ISIS 549577.
Embodiment 144. A compound consisting of ISIS 549580.
Embodiment 145. A compound consisting of ISIS 549581.
Embodiment 146. A compound consisting of ISIS 549582.
Embodiment 147. A compound consisting of ISIS 549583.

Embodiment 148. A compound consisting of ISIS 549584.
Embodiment 149. A compound consisting of ISIS 549585.
Embodiment 150. A compound consisting of ISIS 549586.
Embodiment 151. A compound consisting of ISIS 617341.
Embodiment 152. A compound consisting of ISIS 617351.
Embodiment 153. A compound consisting of ISIS 617352.
Embodiment 154. A compound consisting of ISIS 617353.
Embodiment 155. A compound consisting of ISIS 617358.
Embodiment 156. A compound consisting of ISIS 617360.
Embodiment 157. A compound consisting of ISIS 617361.
Embodiment 158. A compound consisting of ISIS 617362.
Embodiment 159. A method of modulating splicing of a Tau transcript in a cell comprising contacting the cell with a compound according to any of embodiments 1-158.
Embodiment 160. The method of embodiment 158, wherein the cell is in vitro.
Embodiment 161. The method of embodiment 158, wherein the cell is in an animal.
Embodiment 162. A method of modulating the expression of Tau protein in a cell, comprising contacting the cell with a compound according to any of embodiments 1-158.
Embodiment 163. The method of embodiment 162, wherein expression of the 4R isoform of Tau protein is decreased.
Embodiment 164. The method of embodiment 162, wherein expression of the 3R isoform of Tau protein is increased.

Embodiment 165. The method of any of embodiments 162 to 164, wherein the cell is in vitro.
Embodiment 166. The method of any of embodiments 162 to 164, wherein the cell is in an animal.
Embodiment 167. A method of reducing or ameliorating one or more symptoms associated with a tau-associated disorder, comprising contacting a cell with a compound according to any of embodiments 1-158.
Embodiment 168. The method of embodiment 167, wherein the symptom is seizure.
Embodiment 169. The method of any of embodiments 167-168, wherein the cell is in an animal.
Embodiment 170. A pharmaceutical composition comprising a compound according to any of embodiments 1-158 and a pharmaceutically acceptable carrier or diluent.
Embodiment 171. The pharmaceutical composition of embodiment 170, wherein the pharmaceutically acceptable carrier or diluent is sterile saline.
Embodiment 172. A method comprising administering the pharmaceutical composition of embodiments 170 or 171 to an animal.
Embodiment 173. The method of embodiment 172, wherein the administration is by injection.
Embodiment 174. The method of embodiment 172 or 173, wherein the administration is systemic.
Embodiment 175. The method of embodiment 172 or 173, wherein the administration is to the CNS.
Embodiment 176. The method of any of embodiments 172-175, wherein the animal has one or more symptoms associated with one or more tau-associated disorders.
Embodiment 177. The method of embodiment 176, wherein the administration results in amelioration of one or more symptoms associated with one or more tau-associated disorders.

Embodiment 178. The method of any of embodiments 172-175, wherein the animal has one or more symptoms associated with Alzheimer's disease.
Embodiment 179. The method of embodiment 178, wherein the administration results in amelioration of one or more symptoms associated with Alzheimer's disease.
Embodiment 180. The method of any of embodiments 172-179, wherein the animal is a mouse.
Embodiment 181. The method of any of embodiments 172-179, wherein the animal is a human.
Embodiment 182. Use of the compound of any of embodiments 1 to 158 or the composition of embodiments 170-171 for the preparation of a medicament for use in the treatment of a tau-associated disorder.
Embodiment 183. Use of the compound of any of embodiments 1 to 158 or the composition of embodiments 170-171 for the preparation of a medicament for use in the amelioration of one or more symptoms associated a tau-associated disorder.
Embodiment 184. The compound, composition, or method of any of embodiments 1-183, wherein the nucleobase sequence does not consist of the nucleobase sequence as set forth in SEQ ID NO.: 45, 66, 68, 69, or 200.
Embodiment 185. The compound, composition, or method of any of embodiments 1-183, wherein the nucleobase sequence does not consist of the nucleobase sequence CCAGCTTCTTATTAATTATC or TAAGATCCAGCTTCTTATTA.
Embodiment 186. The compound, composition, or method of any of embodiments 1-183, wherein the target region is not within nucleobase 121828 and nucleobase 121847 of SEQ
ID NO.: 1.
Embodiment 187. The compound, composition, or method of any of embodiments 1-183, wherein the target region is not within nucleobase 121834 and nucleobase 121853 of SEQ
ID NO.: 1.
Embodiment 188. The compound, composition, or method of any of embodiments 1-183, wherein the target region is not within nucleobase 121840 and nucleobase 121859 of SEQ
ID NO.: 1.

Embodiment 189. The compound, composition, or method of any of embodiments 1-183, wherein the target region is not within nucleobase 121924 and nucleobase 121941 of SEQ
ID NO.: 1.
Embodiment 190. The compound, composition, or method of any of embodiments 1-183, wherein the target region is not within nucleobase 121012 and nucleobase 121029 of SEQ
ID NO.: 1.
Embodiment 191. The compound, composition, or method of any of embodiments 1-183, wherein the target region is not within nucleobase 121020 and nucleobase 121037 of SEQ
ID NO.: 1.
Embodiment 192. The compound, composition, or method of any of embodiments 1-183, wherein the target region is not within nucleobase 121024 and nucleobase 121041 of SEQ
ID NO.: 1.
BRIEF DESCRIPTION OF THE FIGURES
Figure 1 depicts a graphical representation of Tau isoforms. The isoforms can differ from each other in the number of tubulin-binding domains (three or four repeats located in the C-terminal half of the protein) and are referred to as 3R or 4R Tau isoforms, respectively. They can also differ in the presence or absence of either one or two 29-amino-acid-long, highly acidic inserts at the N-terminal portion of the protein (the projection domain). Between the projection domain and the microtubule-binding domain lies a basic proline-rich region.
DETAILED DESCRIPTION
Unless specific definitions are provided, the nomenclature used in connection with, and the procedures and techniques of, analytical chemistry, synthetic organic chemistry, and medicinal and pharmaceutical chemistry described herein are those well known and commonly used in the art. Standard techniques may be used for chemical synthesis, and chemical analysis. Certain such techniques and procedures may be found for example in "Carbohydrate Modifications in Antisense Research" Edited by Sangvi and Cook, American Chemical Society, Washington D.C., 1994;
"Remington's Pharmaceutical Sciences," Mack Publishing Co., Easton, Pa., 21st edition, 2005; and "Antisense Drug Technology, Principles, Strategies, and Applications" Edited by Stanley T. Crooke, CRC
Press, Boca Raton, Florida;
and Sambrook et al., "Molecular Cloning, A laboratory Manual," rd Edition, Cold Spring Harbor Laboratory Press, 1989, which are hereby incorporated by reference for any purpose. Where permitted, all patents, applications, published applications and other publications and other data referred to throughout in the disclosure are incorporated by reference herein in their entirety.
Unless otherwise indicated, the following terms have the following meanings:
As used herein, "nucleoside" means a compound comprising a nucleobase moiety and a sugar moiety. Nucleosides include, but are not limited to, naturally occurring nucleosides (as found in DNA and RNA) and modified nucleosides. Nucleosides may be linked to a phosphate moiety.
As used herein, "chemical modification" means a chemical difference in a compound when compared to a naturally occurring counterpart. In reference to an oligonucleotide, chemical modification does not include differences only in nucleobase sequence. Chemical modifications of oligonucleotides include nucleoside modifications (including sugar moiety modifications and nucleobase modifications) and internucleoside linkage modifications.
As used herein, "furanosyl" means a structure comprising a 5-membered ring comprising four carbon atoms and one oxygen atom.
As used herein, "naturally occurring sugar moiety" means a ribofuranosyl as found in naturally occurring RNA or a deoxyribofuranosyl as found in naturally occurring DNA.
As used herein, "sugar moiety" means a naturally occurring sugar moiety or a modified sugar moiety of a nucleoside.
As used herein, "modified sugar moiety" means a substituted sugar moiety, a bicyclic or tricyclic sugar moiety, or a sugar surrogate.
As used herein, "substituted sugar moiety" means a furanosyl comprising at least one substituent group that differs from that of a naturally occurring sugar moiety.
Substituted sugar moieties include, but are not limited to furanosyls comprising substituents at the 2'-position, the 3'-position, the 5'-position and/or the 4'-position.
As used herein, "2'-substituted sugar moiety" means a furanosyl comprising a substituent at the 2'-position other than H or OH. Unless otherwise indicated, a 2'-substituted sugar moiety is not a bicyclic sugar moiety (i.e., the 2'-substituent of a 2'-substituted sugar moiety does not form a bridge to another atom of the furanosyl ring.
As used herein, "MOE" means -OCH2CH2OCH3.
As used herein, "bicyclic sugar moiety" means a modified sugar moiety comprising a 4 to 7 membered ring (including but not limited to a furanosyl) comprising a bridge connecting two atoms of the 4 to 7 membered ring to form a second ring, resulting in a bicyclic structure.
In certain embodiments, the 4 to 7 membered ring is a sugar ring. In certain embodiments the 4 to 7 membered ring is a furanosyl. In certain such embodiments, the bridge connects the 2'-carbon and the 4'-carbon of the furanosyl.

As used herein the term "sugar surrogate" means a structure that does not comprise a furanosyl and that is capable of replacing the naturally occurring sugar moiety of a nucleoside, such that the resulting nucleoside is capable of (1) incorporation into an oligonucleotide and (2) hybridization to a complementary nucleoside. Such structures include rings comprising a different number of atoms than furanosyl (e.g., 4, 6, or 7-membered rings); replacement of the oxygen of a furanosyl with a non-oxygen atom (e.g., carbon, sulfur, or nitrogen); or both a change in the number of atoms and a replacement of the oxygen. Such structures may also comprise substitutions corresponding to those described for substituted sugar moieties (e.g., 6-membered carbocyclic bicyclic sugar surrogates optionally comprising additional substituents).
Sugar surrogates also include more complex sugar replacements (e.g., the non-ring systems of peptide nucleic acid). Sugar surrogates include without limitation morpholino, modified morpholinos, cyclohexenyls and cyclohexitols.
As used herein, "nucleotide" means a nucleoside further comprising a phosphate linking group.
As used herein, "linked nucleosides" may or may not be linked by phosphate linkages and thus includes, but is not limited to "linked nucleotides." As used herein, "linked nucleosides"
are nucleosides that are connected in a continuous sequence (i.e. no additional nucleosides are present between those that are linked).
As used herein, "nucleobase" means a group of atoms that can be linked to a sugar moiety to create a nucleoside that is capable of incorporation into an oligonucleotide, and wherein the group of atoms is capable of bonding with a complementary naturally occurring nucleobase of another oligonucleotide or nucleic acid. Nucleobases may be naturally occurring or may be modified.
As used herein, "heterocyclic base" or "heterocyclic nucleobase" means a nucleobase comprising a heterocyclic structure.
As used herein the terms, "unmodified nucleobase" or "naturally occurring nucleobase" means the naturally occurring heterocyclic nucleobases of RNA or DNA: the purine bases adenine (A) and guanine (G), and the pyrimidine bases thymine (T), cytosine (C) (including 5-methyl C), and uracil (U).
As used herein, "modified nucleobase" means any nucleobase that is not a naturally occurring nucleobase.
As used herein, "modified nucleoside" means a nucleoside comprising at least one chemical modification compared to naturally occurring RNA or DNA nucleosides. Modified nucleosides comprise a modified sugar moiety and/or a modified nucleobase.
As used herein, "bicyclic nucleoside" or "BNA" means a nucleoside comprising a bicyclic sugar moiety.
As used herein, "constrained ethyl nucleoside" or "cEt" means a nucleoside comprising a bicyclic sugar moiety comprising a 4'-CH(CH3)-0-2'bridge.

As used herein, "locked nucleic acid nucleoside" or "LNA" means a nucleoside comprising a bicyclic sugar moiety comprising a 4'-CH2-0-2'bridge.
As used herein, "2'-substituted nucleoside" means a nucleoside comprising a substituent at the 2'-position other than H or OH. Unless otherwise indicated, a 2'-substituted nucleoside is not a bicyclic nucleoside.
As used herein, "2'-deoxynucleoside" means a nucleoside comprising 2'-H
furanosyl sugar moiety, as found in naturally occurring deoxyribonucleosides (DNA). In certain embodiments, a 2'-deoxynucleoside may comprise a modified nucleobase or may comprise an RNA
nucleobase (e.g., uracil).
As used herein, "oligonucleotide" means a compound comprising a plurality of linked nucleosides.
In certain embodiments, an oligonucleotide comprises one or more unmodified ribonucleosides (RNA) and/or unmodified deoxyribonucleosides (DNA) and/or one or more modified nucleosides.
As used herein "oligonucleoside" means an oligonucleotide in which none of the internucleoside linkages contains a phosphorus atom. As used herein, oligonucleotides include oligonucleosides.
As used herein, "modified oligonucleotide" means an oligonucleotide comprising at least one modified nucleoside and/or at least one modified internucleoside linkage.
As used herein "internucleoside linkage" means a covalent linkage between adjacent nucleosides in an oligonucleotide.
As used herein "naturally occurring internucleoside linkage" means a 3' to 5' phosphodiester linkage.
As used herein, "modified internucleoside linkage" means any internucleoside linkage other than a naturally occurring internucleoside linkage.
As used herein, "oligomeric compound" means a polymeric structure comprising two or more sub-structures. In certain embodiments, an oligomeric compound comprises an oligonucleotide. In certain embodiments, an oligomeric compound comprises one or more conjugate groups and/or terminal groups. In certain embodiments, an oligomeric compound consists of an oligonucleotide.
As used herein, "terminal group" means one or more atom attached to either, or both, the 3' end or the 5' end of an oligonucleotide. In certain embodiments a terminal group is a conjugate group. In certain embodiments, a terminal group comprises one or more terminal group nucleosides.
As used herein, "conjugate" means an atom or group of atoms bound to an oligonucleotide or oligomeric compound. In general, conjugate groups modify one or more properties of the compound to which they are attached, including, but not limited to pharmacodynamic, pharmacokinetic, binding, absorption, cellular distribution, cellular uptake, charge and/or clearance properties.
As used herein, "conjugate linking group" means any atom or group of atoms used to attach a conjugate to an oligonucleotide or oligomeric compound.
As used herein, "antisense compound" means a compound comprising or consisting of an oligonucleotide at least a portion of which is complementary to a target nucleic acid to which it is capable of hybridizing, resulting in at least one antisense activity.
As used herein, "antisense activity" means any detectable and/or measurable change attributable to the hybridization of an antisense compound to its target nucleic acid.
As used herein, "detecting" or "measuring" means that a test or assay for detecting or measuring is performed. Such detection and/or measuring may result in a value of zero.
Thus, if a test for detection or measuring results in a finding of no activity (activity of zero), the step of detecting or measuring the activity has nevertheless been performed.
As used herein, "detectable and/or measureable activity" means a statistically significant activity that is not zero.
As used herein, "essentially unchanged" means little or no change in a particular parameter, particularly relative to another parameter which changes much more. In certain embodiments, a parameter is essentially unchanged when it changes less than 5%. In certain embodiments, a parameter is essentially unchanged if it changes less than two-fold while another parameter changes at least ten-fold. For example, in certain embodiments, an antisense activity is a change in the amount of a target nucleic acid. In certain such embodiments, the amount of a non-target nucleic acid is essentially unchanged if it changes much less than the target nucleic acid does, but the change need not be zero.
As used herein, "expression" means the process by which a gene ultimately results in a protein.
Expression includes, but is not limited to, transcription, post-transcriptional modification (e.g., splicing, polyadenlyation, addition of 5'-cap), and translation.
As used herein, "target nucleic acid" means a nucleic acid molecule to which an antisense compound hybridizes.
As used herein, "mRNA" means an RNA molecule that encodes a protein.
As used herein, "pre-mRNA" means an RNA transcript that has not been fully processed into mRNA. Pre-RNA includes one or more intron.
As used herein, "transcript" means an RNA molecule transcribed from DNA.
Transcripts include, but are not limitied to mRNA, pre-mRNA, and partially processed RNA.
As used herein, "Tau transcript" means a transcript transcribed from a Tau gene. In certain embodiments, a Tau transcript is represented by GENBANK Accession No NT_010783.15, truncated from nucleotides 9240000 to 9381000 (SEQ ID NO: 1), or a variant thereof As used herein, "Tau gene" means a gene that encodes a Tau protein and any Tau protein isoforms.
In certain embodiments, Tau protein isoforms include the 3R isoform and the 4R
isoform.

As used herein, "3R" means a Tau transcript that includes does not include exon 10.
As used herein, "3R Tau isoform" means a Tau protein isoform that does not include amino acids encoded from exon 10.
As used herein, "4R" means a Tau transcript that includes exon 10.
As used herein, "4R Tau isoform" means a Tau protein isoform that includes amino acids encoded from exon 10.
As used herein, "Tau-associated disease" means any neurological or neurodegenerative disease associated with Tau. Non-limiting examples of Tau-associated disorders include Alzheimer's disease, progressive supranuclear palsy, dementia pugilistica, frontotemporal dementia, parkinsonism linked to chromosome, Lytico-Bodig disease, tangle-predominant dementia, ganglioglioma, gangliocytoma, meningioangiomatosis, subacute sclerosing panencephalitis, lead encephalopathy, tuberous sclerosis, Hallervorden-Spatz disease, Pick's disease, corticobasal ganglionic degeneration, argyrophilic grain disease, supranuclear palsy, corticobasal degeneration, frontotemporal dementia, or frontotemporal lobar degeneration.
As used herein, "Tauopathy" means disorders characterized by a build-up of Tau protein in the brain.
As used herein, "Tau-specific inhibitor" includes but is not limited to a "antisense compound"
targeted to Tau.
As used herein, "targeting" or "targeted to" means the association of an antisense compound to a particular target nucleic acid molecule or a particular region of a target nucleic acid molecule. An antisense compound targets a target nucleic acid if it is sufficiently complementary to the target nucleic acid to allow hybridization under physiological conditions.
As used herein, "nucleobase complementarity" or "complementarity" when in reference to nucleobases means a nucleobase that is capable of base pairing with another nucleobase. For example, in DNA, adenine (A) is complementary to thymine (T). For example, in RNA, adenine (A) is complementary to uracil (U). In certain embodiments, complementary nucleobase means a nucleobase of an antisense compound that is capable of base pairing with a nucleobase of its target nucleic acid. For example, if a nucleobase at a certain position of an antisense compound is capable of hydrogen bonding with a nucleobase at a certain position of a target nucleic acid, then the position of hydrogen bonding between the oligonucleotide and the target nucleic acid is considered to be complementary at that nucleobase pair.
Nucleobases comprising certain modifications may maintain the ability to pair with a counterpart nucleobase and thus, are still capable of nucleobase complementarity.
As used herein, "non-complementary" in reference to nucleobases means a pair of nucleobases that do not form hydrogen bonds with one another.

As used herein, "complementary" in reference to oligomeric compounds (e.g., linked nucleosides, oligonucleotides, or nucleic acids) means the capacity of such oligomeric compounds or regions thereof to hybridize to another oligomeric compound or region thereof through nucleobase complementarity under stringent conditions. Complementary oligomeric compounds need not have nucleobase complementarity at each nucleoside. Rather, some mismatches are tolerated. In certain embodiments, complementary oligomeric compounds or regions are complementary at 70% of the nucleobases (70% complementary).
In certain embodiments, complementary oligomeric compounds or regions are 80%
complementary. In certain embodiments, complementary oligomeric compounds or regions are 90%
complementary. In certain embodiments, complementary oligomeric compounds or regions are 95%
complementary. In certain embodiments, complementary oligomeric compounds or regions are 100%
complementary.
As used herein, "hybridization" means the pairing of complementary oligomeric compounds (e.g., an antisense compound and its target nucleic acid). While not limited to a particular mechanism, the most common mechanism of pairing involves hydrogen bonding, which may be Watson-Crick, Hoogsteen or reversed Hoogsteen hydrogen bonding, between complementary nucleobases.
As used herein, "specifically hybridizes" means the ability of an oligomeric compound to hybridize to one nucleic acid site with greater affinity than it hybridizes to another nucleic acid site. In certain embodiments, an antisense oligonucleotide specifically hybridizes to more than one target site.
As used herein, "percent complementarity" means the percentage of nucleobases of an oligomeric compound that are complementary to an equal-length portion of a target nucleic acid. Percent complementarity is calculated by dividing the number of nucleobases of the oligomeric compound that are complementary to nucleobases at corresponding positions in the target nucleic acid by the total length of the oligomeric compound.
As used herein, "percent identity" means the number of nucleobases in a first nucleic acid that are the same type (independent of chemical modification) as nucleobases at corresponding positions in a second nucleic acid, divided by the total number of nucleobases in the first nucleic acid.
As used herein, "modulation" means a change of amount or quality of a molecule, function, or activity when compared to the amount or quality of a molecule, function, or activity prior to modulation.
For example, modulation includes the change, either an increase (stimulation or induction) or a decrease (inhibition or reduction) in gene expression. As a further example, modulation of expression can include a change in splice site selection of pre-mRNA processing, resulting in a change in the absolute or relative amount of a particular splice-variant compared to the amount in the absence of modulation.
As used herein, "motif' means a pattern of chemical modifications in an oligomeric compound or a region thereof Motifs may be defined by modifications at certain nucleosides and/or at certain linking groups of an oligomeric compound.

As used herein, "nucleoside motif' means a pattern of nucleoside modifications in an oligomeric compound or a region thereof The linkages of such an oligomeric compound may be modified or unmodified. Unless otherwise indicated, motifs herein describing only nucleosides are intended to be nucleoside motifs. Thus, in such instances, the linkages are not limited.
As used herein, "sugar motif' means a pattern of sugar modifications in an oligomeric compound or a region thereof As used herein, "linkage motif' means a pattern of linkage modifications in an oligomeric compound or region thereof The nucleosides of such an oligomeric compound may be modified or unmodified. Unless otherwise indicated, motifs herein describing only linkages are intended to be linkage motifs. Thus, in such instances, the nucleosides are not limited.
As used herein, "nucleobase modification motif' means a pattern of modifications to nucleobases along an oligonucleotide. Unless otherwise indicated, a nucleobase modification motif is independent of the nucleobase sequence.
As used herein, "sequence motif' means a pattern of nucleobases arranged along an oligonucleotide or portion thereof Unless otherwise indicated, a sequence motif is independent of chemical modifications and thus may have any combination of chemical modifications, including no chemical modifications.
As used herein, "type of modification" in reference to a nucleoside or a nucleoside of a "type"
means the chemical modification of a nucleoside and includes modified and unmodified nucleosides.
Accordingly, unless otherwise indicated, a "nucleoside having a modification of a first type" may be an unmodified nucleoside.
As used herein, "differently modified" mean chemical modifications or chemical substituents that are different from one another, including absence of modifications. Thus, for example, a MOE nucleoside and an unmodified DNA nucleoside are "differently modified," even though the DNA nucleoside is unmodified. Likewise, DNA and RNA are "differently modified," even though both are naturally-occurring unmodified nucleosides. Nucleosides that are the same but for comprising different nucleobases are not differently modified. For example, a nucleoside comprising a 2'-0Me modified sugar and an unmodified adenine nucleobase and a nucleoside comprising a 2'-0Me modified sugar and an unmodified thymine nucleobase are not differently modified.
As used herein, "the same type of modifications" refers to modifications that are the same as one another, including absence of modifications. Thus, for example, two unmodified DNA nucleoside have "the same type of modification," even though the DNA nucleoside is unmodified.
Such nucleosides having the same type modification may comprise different nucleobases.
As used herein, "pharmaceutically acceptable carrier or diluent" means any substance suitable for use in administering to an animal. In certain embodiments, a pharmaceutically acceptable carrier or diluent is sterile saline. In certain embodiments, such sterile saline is pharmaceutical grade saline.
As used herein, "substituent" and "substituent group," means an atom or group that replaces the atom or group of a named parent compound. For example a substituent of a modified nucleoside is any atom or group that differs from the atom or group found in a naturally occurring nucleoside (e.g., a modified 2'-substuent is any atom or group at the 2'-position of a nucleoside other than H or OH). Substituent groups can be protected or unprotected. In certain embodiments, compounds of the present invention have substituents at one or at more than one position of the parent compound.
Substituents may also be further substituted with other substituent groups and may be attached directly or via a linking group such as an alkyl or hydrocarbyl group to a parent compound.
Likewise, as used herein, "substituent" in reference to a chemical functional group means an atom or group of atoms differs from the atom or a group of atoms normally present in the named functional group. In certain embodiments, a substituent replaces a hydrogen atom of the functional group (e.g., in certain embodiments, the substituent of a substituted methyl group is an atom or group other than hydrogen which replaces one of the hydrogen atoms of an unsubstituted methyl group).
Unless otherwise indicated, groups amenable for use as substituents include without limitation, halogen, hydroxyl, alkyl, alkenyl, alkynyl, acyl (-C(0)Raa), carboxyl (-C(0)0-Raa), aliphatic groups, alicyclic groups, alkoxy, substituted oxy (-O-Raa), aryl, aralkyl, heterocyclic radical, heteroaryl, heteroarylalkyl, amino (-N(Rbb)(Ree)), imino(=NRbb), amido (-C(0)N(Rbb)(Ree) or -N(Rbb)C(0)Raa), azido (-N3), nitro (-NO2), cyano (-CN), carbamido (-0C(0)N(Rbb)(Ree) or -N(Rbb)C(0)0Raa), ureido (-N(Rbb)C(0)N(Rbb)(Ree)), thioureido (-N(Rbb)C(S)N(Rbb)(Rõ)), guanidinyl (-N(Rbb)C(=NRbb)N(Rbb)(Ree)), amidinyl (-C(=NRbb)N(Rbb)(Ree) or -N(Rbb)C(=NRbb)(Raa)), thiol (-SRbb), sulfinyl (-S(0)Rbb), sulfonyl (-S(0)2Rbb) and sulfonamidyl (-S(0)2N(Rbb)(Ree) or -N(Rbb)S(0)2Rbb). Wherein each Raa, Rbb and Ree is, independently, H, an optionally linked chemical functional group or a further substituent group with a preferred list including without limitation, alkyl, alkenyl, alkynyl, aliphatic, alkoxy, acyl, aryl, aralkyl, heteroaryl, alicyclic, heterocyclic and heteroarylalkyl. Selected substituents within the compounds described herein are present to a recursive degree.
As used herein, "alkyl," as used herein, means a saturated straight or branched hydrocarbon radical containing up to twenty four carbon atoms. Examples of alkyl groups include without limitation, methyl, ethyl, propyl, butyl, isopropyl, n-hexyl, octyl, decyl, dodecyl and the like.
Alkyl groups typically include from 1 to about 24 carbon atoms, more typically from 1 to about 12 carbon atoms (C1-C12alkyl) with from 1 to about 6 carbon atoms being more preferred.
As used herein, "alkenyl," means a straight or branched hydrocarbon chain radical containing up to twenty four carbon atoms and having at least one carbon-carbon double bond.
Examples of alkenyl groups include without limitation, ethenyl, propenyl, butenyl, 1-methy1-2-buten-l-yl, dienes such as 1,3-butadiene and the like. Alkenyl groups typically include from 2 to about 24 carbon atoms, more typically from 2 to about 12 carbon atoms with from 2 to about 6 carbon atoms being more preferred. Alkenyl groups as used herein may optionally include one or more further substituent groups.
As used herein, "alkynyl," means a straight or branched hydrocarbon radical containing up to twenty four carbon atoms and having at least one carbon-carbon triple bond.
Examples of alkynyl groups include, without limitation, ethynyl, 1-propynyl, 1-butynyl, and the like.
Alkynyl groups typically include from 2 to about 24 carbon atoms, more typically from 2 to about 12 carbon atoms with from 2 to about 6 carbon atoms being more preferred. Alkynyl groups as used herein may optionally include one or more further substituent groups.
As used herein, "acyl," means a radical formed by removal of a hydroxyl group from an organic acid and has the general Formula -C(0)-X where X is typically aliphatic, alicyclic or aromatic. Examples include aliphatic carbonyls, aromatic carbonyls, aliphatic sulfonyls, aromatic sulfinyls, aliphatic sulfinyls, aromatic phosphates, aliphatic phosphates and the like. Acyl groups as used herein may optionally include further substituent groups.
As used herein, "alicyclic" means a cyclic ring system wherein the ring is aliphatic. The ring system can comprise one or more rings wherein at least one ring is aliphatic.
Preferred alicyclics include rings having from about 5 to about 9 carbon atoms in the ring. Alicyclic as used herein may optionally include further substituent groups.
As used herein, "aliphatic" means a straight or branched hydrocarbon radical containing up to twenty four carbon atoms wherein the saturation between any two carbon atoms is a single, double or triple bond. An aliphatic group preferably contains from 1 to about 24 carbon atoms, more typically from 1 to about 12 carbon atoms with from 1 to about 6 carbon atoms being more preferred. The straight or branched chain of an aliphatic group may be interrupted with one or more heteroatoms that include nitrogen, oxygen, sulfur and phosphorus. Such aliphatic groups interrupted by heteroatoms include without limitation, polyalkoxys, such as polyalkylene glycols, polyamines, and polyimines. Aliphatic groups as used herein may optionally include further substituent groups.
As used herein, "alkoxy" means a radical formed between an alkyl group and an oxygen atom wherein the oxygen atom is used to attach the alkoxy group to a parent molecule. Examples of alkoxy groups include without limitation, methoxy, ethoxy, propoxy, isopropoxy, n-butoxy, sec-butoxy, tert-butoxy, n-pentoxy, neopentoxy, n-hexoxy and the like. Alkoxy groups as used herein may optionally include further substituent groups.
As used herein, "aminoalkyl" means an amino substituted C1-C12alkyl radical.
The alkyl portion of the radical forms a covalent bond with a parent molecule. The amino group can be located at any position and the aminoalkyl group can be substituted with a further substituent group at the alkyl and/or amino portions.
As used herein, "aralkyl" and "arylalkyl" mean an aromatic group that is covalently linked to a Ci-C12 alkyl radical. The alkyl radical portion of the resulting aralkyl (or arylalkyl) group forms a covalent bond with a parent molecule. Examples include without limitation, benzyl, phenethyl and the like.
Aralkyl groups as used herein may optionally include further substituent groups attached to the alkyl, the aryl or both groups that form the radical group.
As used herein, "aryl" and "aromatic" mean a mono- or polycyclic carbocyclic ring system radicals having one or more aromatic rings. Examples of aryl groups include without limitation, phenyl, naphthyl, tetrahydronaphthyl, indanyl, idenyl and the like. Preferred aryl ring systems have from about 5 to about 20 carbon atoms in one or more rings. Aryl groups as used herein may optionally include further substituent groups.
As used herein, "halo" and "halogen," mean an atom selected from fluorine, chlorine, bromine and iodine.
As used herein, "heteroaryl," and "heteroaromatic," mean a radical comprising a mono- or poly-cyclic aromatic ring, ring system or fused ring system wherein at least one of the rings is aromatic and includes one or more heteroatoms. Heteroaryl is also meant to include fused ring systems including systems where one or more of the fused rings contain no heteroatoms.
Heteroaryl groups typically include one ring atom selected from sulfur, nitrogen or oxygen. Examples of heteroaryl groups include without limitation, pyridinyl, pyrazinyl, pyrimidinyl, pyrrolyl, pyrazolyl, imidazolyl, thiazolyl, oxazolyl, isooxazolyl, thiadiazolyl, oxadiazolyl, thiophenyl, furanyl, quinolinyl, isoquinolinyl, benzimidazolyl, benzooxazolyl, quinoxalinyl and the like. Heteroaryl radicals can be attached to a parent molecule directly or through a linking moiety such as an aliphatic group or hetero atom.
Heteroaryl groups as used herein may optionally include further substituent groups.
Oligomeric Compounds In certain embodiments, the present invention provides oligomeric compounds.
In certain embodiments, such oligomeric compounds comprise oligonucleotides optionally comprising one or more conjugate and/or terminal groups. In certain embodiments, an oligomeric compound consists of an oligonucleotide. In certain embodiments, oligonucleotides comprise one or more chemical modifications.
Such chemical modifications include modifications one or more nucleoside (including modifications to the sugar moiety and/or the nucleobase) and/or modifications to one or more internucleoside linkage.
Certain Sugar Moieties In certain embodiments, oligomeric compounds of the invention comprise one or more modifed nucleosides comprising a modifed sugar moiety. Such oligomeric compounds comprising one or more sugar-modified nucleosides may have desirable properties, such as enhanced nuclease stability or increased binding affinity with a target nucleic acid relative to oligomeric compounds comprising only nucleosides comprising naturally occurring sugar moieties. In certain embodiments, modified sugar moieties are substitued sugar moieties. In certain embodiments, modified sugar moieties are bicyclic or tricyclic sugar moieties. In certain embodiments, modified sugar moieties are sugar surrogates. Such sugar surogates may comprise one or more substitutions corresponding to those of substituted sugar moieties.
In certain embodiments, modified sugar moieties are substituted sugar moieties comprising one or more substituent, including but not limited to substituents at the 2' and/or 5' positions. Examples of sugar substituents suitable for the 2'-position, include, but are not limited to: 2'-F, 2'-OCH3("OMe" or "0-methyl"), and 2'-0(CH2)20CH3 ("MOE"). In certain embodiments, sugar substituents at the 2' position is selected from allyl, amino, azido, thio, 0-allyl, 0-C1-C10 alkyl, 0-Ci-Cio substituted alkyl; 0-C1-C10 alkoxy; 0- C1-C10 substituted alkoxy, OCF3, 0(CH2)25CH3, 0(CH2)2-0-N(Rm)(Rn), and 0-CH2-C(=0)-N(Rm)(Rn), where each Rm and Rn is, independently, H or substituted or unsubstituted C1-C10 alkyl. Examples of sugar substituents at the 5'-position, include, but are not limited to:, 5'-methyl (R or S); 5'-vinyl, and 5'-methoxy. In certain embodiments, substituted sugars comprise more than one non-bridging sugar substituent, for example, 2'-F-5'-methyl sugar moieties (see,e.g., PCT International Application WO 2008/101157, for additional 5', 2'-bis substituted sugar moieties and nucleosides).
Nucleosides comprising 2'-substituted sugar moieties are referred to as 2'-substituted nucleosides.
In certain embodiments, a 2'- substituted nucleoside comprises a 2'-substituent group selected from halo, allyl, amino, azido, 0- C1-C10 alkoxy; 0- Ci-Cio substituted alkoxy, SH, CN, OCN, CF3, OCF3, 0-alkyl, 5-alkyl, N(Rin)-alkyl; 0- alkenyl, S- alkenyl, or N(Rin)-alkenyl; 0- alkynyl, S- alkynyl, N(Rin)-alkynyl;
0-alkyleny1-0-alkyl, alkynyl, alkaryl, aralkyl, 0-alkaryl, 0-aralkyl, 0(CH2)25CH3, 0-(CH2)2-0-N(Rin)(R.) or 0-CH2-C(=0)-N(Rin)(Rn), where each Rin and Rn is, independently, H, an amino protecting group or substituted or unsubstituted C1-C10 alkyl. These 2'-substituent groups can be further substituted with one or more substituent groups independently selected from hydroxyl, amino, alkoxy, carboxy, benzyl, phenyl, nitro (NO2), thiol, thioalkoxy (S-alkyl), halogen, alkyl, aryl, alkenyl and alkynyl.
In certain embodiments, a 2'- substituted nucleoside comprises a 2'-substituent group selected from F, NH2, N3, OCF3, 0-CH3, 0(CH2)3NH2, CH2-CH=CH2, 0-CH2-CH=CH2, OCH2CH2OCH3, 0(CH2)25CH3, 0-(CH2)2-0-N(Rin)(R.), 0(CH2)20(CH2)2N(CH3)2, and N-substituted acetamide (0-CH2-C(=0)-N(Rin)(Rn) where each Rin and Rn is, independently, H, an amino protecting group or substituted or unsubstituted C1-C10 alkyl.

In certain embodiments, a 2'- substituted nucleoside comprises a sugar moiety comprising a 2'-substituent group selected from F, OCF3, O-CH3, OCH2CH2OCH3, 0(CH2)2SCH3, 0-(CH2)2-0-N(CH3)2, -0(CH2)20(CH2)2N(CH3)2, and 0-CH2-C(-0)-N(H)CH3.
In certain embodiments, a 2'- substituted nucleoside comprises a sugar moiety comprising a 2'-substituent group selected from F, O-CH3, and OCH2CH2OCH3.
Certain modifed sugar moieties comprise a bridging sugar substituent that forms a second ring resulting in a bicyclic sugar moiety. In certain such embodiments, the bicyclic sugar moiety comprises a bridge between the 4' and the 2' furanose ring atoms. Examples of such 4' to 2' sugar substituents, include, but are not limited to: -[C(Ra)(Rb)]õ-, -[C(Ra)(Rb)]a-0-, -C(RaRb)-N(R)-0- or, -C(RaRb)-0-N(R)-;
4'-CH2-2', 4'-(CH2)2-2', 4'-(CH2)3-2',. 4'-(CH2)-0-2' (LNA); 4'-(CH2)-S-2'; 4'-(CH2)270-2' (ENA);
4'-CH(CH3)-0-2' (cEt) and 4'-CH(CH2OCH3)-0-2',and analogs thereof (see, e.g., U.S. Patent 7,399,845, issued on July 15, 2008); 4'-C(CH3)(CH3)-0-2'and analogs thereof, (see, e.g., W02009/006478, published January 8, 2009); 4'-CH2-N(OCH3)-2' and analogs thereof (see, e.g., W02008/150729, published December 11, 2008); 4'-CH2-0-N(CH3)-2' (see, e.g., US2004/0171570, published September 2, 2004);
4'-CH2-0-N(R)-2', and 4'-CH2-N(R)-0-2'-, wherein each R is, independently, H, a protecting group, or C1-C12 alkyl; 4'-CH2-N(R)-0-2', wherein R is H, CI-C12 alkyl, or a protecting group (see, U.S. Patent 7,427,672, issued on September 23, 2008); 4'-CH2-C(H)(CH3)-2' (see, e.g., Chattopadhyaya, et al., J. Org.
Chem.,2009, 74, 118-134); and 4'-CH2-C(=CH2)-2' and analogs thereof (see, published PCT International Application WO 2008/154401, published on December 8, 2008).
In certain embodiments, such 4' to 2' bridges independently comprise from 1 to 4 linked groups independently selected from -[C(Ra)(Rb)]a-, -C(Ra)=C(Rb)-, -C(Ra)=N-, -C(=NRa)-, -C(=0)-, -C(=5)-, -0-, -Si(Ra)27, -S(=0)x-, and -N(Ra)-;
wherein:
xis 0, 1, or 2;
n is 1, 2, 3, or 4;
each Ra and Rb is, independently, H, a protecting group, hydroxyl, C1-C12 alkyl, substituted C1-C12 alkyl, C2-C12 alkenyl, substituted C2-C12 alkenyl, C2-C12 alkynyl, substituted C2-C12 alkynyl, C5-C20 aryl, substituted C5-C20 aryl, heterocycle radical, substituted heterocycle radical, heteroaryl, substituted heteroaryl, C5-C7 alicyclic radical, substituted C5-C7alicyclic radical, halogen, OJI, NJ1J2, 5J1, N3, COOJI, acyl (C(=0)-H), substituted acyl, CN, sulfonyl (S(=0)2-J1), or sulfoxyl (S(=0)-Ji); and each J1 and .12 is, independently, H, CI-C12 alkyl, substituted C1-C12 alkyl, C2-C12 alkenyl, substituted C2-C12 alkenyl, C2-C12 alkynyl, substituted C2-C12 alkynyl, C5-C20 aryl, substituted C5-C20 aryl, acyl (C(=0)-H), substituted acyl, a heterocycle radical, a substituted heterocycle radical, C1-C12 aminoalkyl, substituted CI-C12 aminoalkyl, or a protecting group.

Nucleosides comprising bicyclic sugar moieties are referred to as bicyclic nucleosides or BNAs.
Bicyclic nucleosides include, but are not limited to, (A) a-L-Methyleneoxy (4'-CH2-0-2') BNA, (B) 13-D-Methyleneoxy (4'-CH2-0-2') BNA (also referred to as locked nucleic acid or LNA) , (C) Ethyleneoxy (4'-(CH2)2-0-2') BNA, (D) Aminooxy (4'-CH2-0-N(R)-2') BNA, (E) Oxyamino (4'-CH2-N(R)-0-2') BNA, (F) Methyl(methyleneoxy) (4'-CH(CH3)-0-2') BNA (also referred to as constrained ethyl or cEt), (G) methylene-thio (4'-CH2-S-2') BNA, (H) methylene-amino (4'-CH2-N(R)-2') BNA, (I) methyl carbocyclic (4'-CH2-CH(CH3)-2') BNA, and (J) propylene carbocyclic (4'-(CH2)3-2') BNA as depicted below.
______________________________ 0 Bx 0 Bx 0 p 0- 'x (A) (B) (C) ______________ 0 Bx 0 Bx 0 Bx 0¨ ¨N R 0 N-- ¨ H3C ,0 ¨, -,, (D) R (E) (F) _____________________________________ 0 y Bx 0y Bx i (H) 0 Bx --S ------ ---N
(G) R
(I) 0 Bx I

(J) wherein Bx is a nucleobase moiety and R is, independently, H, a protecting group, or C1-C12 alkyl.
Additional bicyclic sugar moieties are known in the art, for example: Singh et al., Chem.
Commun., 1998, 4, 455-456; Koshkin et al., Tetrahedron, 1998, 54, 3607-3630;
Wahlestedt et al., Proc.
NatL Acad. Sci. U. S. A., 2000, 97, 5633-5638; Kumar et al., Bioorg. Med.
Chem. Lett., 1998, 8, 2219-2222;
Singh et al., I Org. Chem., 1998, 63, 10035-10039; Srivastava et al., J Am.
Chem. Soc., 129(26) 8362-8379 (Jul. 4, 2007); Elayadi et al., Curr. Opinion Invens. Drugs, 2001, 2, 558-561; Braasch et al., Chem. Biol., 2001, 8, 1-7; Orum et al., Curr. Opinion Mol. Ther., 2001, 3, 239-243; U.S. Patent Nos.
7,053,207, 6,268,490, 6,770,748, 6,794,499, 7,034,133, 6,525,191, 6,670,461, and 7,399,845; WO
2004/106356, WO 1994/14226, WO 2005/021570, and WO 2007/134181; U.S. Patent Publication Nos.
U52004/0171570, U52007/0287831, and U52008/0039618; U.S. Patent Serial Nos.
12/129,154, 60/989,574, 61/026,995, 61/026,998, 61/056,564, 61/086,231, 61/097,787, and 61/099,844; and PCT
International Applications Nos. PCT/U52008/064591, PCT/US2008/066154, and PCT/U52008/068922.
In certain embodiments, bicyclic sugar moieties and nucleosides incorporating such bicyclic sugar moieties are further defined by isomeric configuration. For example, a nucleoside comprising a 4'-2' methylene-oxy bridge, may be in the a-L configuration or in the I3-D
configuration. Previously, a-L-methyleneoxy (4'-CH2-0-2') bicyclic nucleosides have been incorporated into antisense oligonucleotides that showed antisense activity (Frieden et al., Nucleic Acids Research, 2003, 21, 6365-6372).
In certain embodiments, substituted sugar moieties comprise one or more non-bridging sugar substituent and one or more bridging sugar substituent (e.g., 5'-substituted and 4'-2' bridged sugars). (see, PCT International Application WO 2007/134181, published on 11/22/07, wherein LNA is substituted with, for example, a 5'-methyl or a 5'-vinyl group).
In certain embodiments, modified sugar moieties are sugar surrogates. In certain such embodiments, the oxygen atom of the naturally occuring sugar is substituted, e.g., with a sulfer, carbon or nitrogen atom. In certain such embodiments, such modified sugar moiety also comprises bridging and/or non-bridging substituents as described above. For example, certain sugar surogates comprise a 4'-sulfer atom and a substitution at the 2'-position (see,e.g., published U.S. Patent Application U52005/0130923, published on June 16, 2005) and/or the 5' position. By way of additional example, carbocyclic bicyclic nucleosides having a 4'-2' bridge have been described (see, e.g., Freier et al., Nucleic Acids Research, 1997, 25(22), 4429-4443 and Albaek et al., J. Org. Chem., 2006, 7/, 7731-7740).
In certain embodiments, sugar surrogates comprise rings having other than 5-atoms. For example, in certain embodiments, a sugar surrogate comprises a six-membered tetrahydropyran. Such tetrahydropyrans may be further modified or substituted. Nucleosides comprising such modified tetrahydropyrans include, but are not limited to, hexitol nucleic acid (HNA), anitol nucleic acid (ANA), manitol nucleic acid (MNA) (see Leumann, CJ. Bioorg. & Med. Chem. (2002)

10:841-854), fluoro HNA
(F-HNA), and those compounds having Formula VII:

c11 q2 T3¨O-3 qq67B4X

VII
wherein independently for each of said at least one tetrahydropyran nucleoside analog of Formula VII:
Bx is a nucleobase moiety;
T3 and T4 are each, independently, an internucleoside linking group linking the tetrahydropyran nucleoside analog to the antisense compound or one of T3 and T4 is an internucleoside linking group linking the tetrahydropyran nucleoside analog to the antisense compound and the other of T3 and T4 is H, a hydroxyl protecting group, a linked conjugate group, or a 5' or 3'-terminal group;
qi, q2, q3, q4, q5, q6 and q7 are each, independently, H, C1-C6 alkyl, substituted Ci-C6 alkyl, C2-C6 alkenyl, substituted C2-C6 alkenyl, C2-C6 alkynyl, or substituted C2-C6 alkynyl; and each of R1 and R2 is independently selected from among: hydrogen, halogen, substituted or unsubstituted alkoxy, NJ1J2, SJI, N3, OC(=X)Ji, OC(=X)NJ1J2, NJ3C(=X)NJ1J2, and CN, wherein X is 0, S
or NJI, and each J1, J2, and J3 is, independently, H or C1-C6 alkyl.
In certain embodiments, the modified THP nucleosides of Formula VII are provided wherein qi, q2, q3, q4, q5, q6and (47 are each H. In certain embodiments, at least one of qi, q2, q3, q4, q5, q6 and q7 is other than H. In certain embodiments, at least one of qi, q2, q3, q4, q5, q6 and q7 is methyl. In certain embodiments, THP nucleosides of Formula VII are provided wherein one of R1 and R2 is F. In certain embodiments, R1 is fluoro and R2 is H, R1 is methoxy and R2 is H, and R1 is methoxyethoxy and R2 is H.
Many other bicyclic and tricyclic sugar and sugar surrogate ring systems are known in the art that can be used to modify nucleosides (see, e.g., review article: Leumann, J. C, Bioorganic & Medicinal Chemistry, 2002, 10, 841-854).
In certain embodiments, sugar surrogates comprise rings having more than 5 atoms and more than one heteroatom. For example nucleosides comprising morpholino sugar moieties and their use in oligomeric compounds has been reported (see for example: Braasch et al., Biochemistry, 2002, 41, 4503-4510; and U.S. Patents 5,698,685; 5,166,315; 5,185,444; and 5,034,506).
As used here, the term "morpholino" means a sugar surrogate having the following structure:
Bx In certain embodiments, morpholinos may be modified, for example by adding or altering various substituent groups from the above morpholino structure. Such sugar surrogates are refered to herein as "modifed morpholinos."
Combinations of modifications are also provided without limitation, such as 2'-F-5'-methyl substituted nucleosides (see PCT International Application WO 2008/101157 Published on 8/21/08 for other disclosed 5', 2'-bis substituted nucleosides) and replacement of the ribosyl ring oxygen atom with S
and further substitution at the 2'-position (see published U.S. Patent Application U52005-0130923, published on June 16, 2005) or alternatively 5'-substitution of a bicyclic nucleic acid (see PCT International Application WO 2007/134181, published on 11/22/07 wherein a 4'-CH2-0-2' bicyclic nucleoside is further substituted at the 5' position with a 5'-methyl or a 5'-vinyl group). The synthesis and preparation of carbocyclic bicyclic nucleosides along with their oligomerization and biochemical studies have also been described (see, e.g., Srivastava et al., .I. Am. Chem. Soc. 2007, 129(26), 8362-8379).
Certain Nucleobases In certain embodiments, nucleosides of the present invention comprise one or more unmodified nucleobases. In certain embodiments, nucleosides of the present invention comprise one or more modifed nucleobases.
In certain embodiments, modified nucleobases are selected from: universal bases, hydrophobic bases, promiscuous bases, size-expanded bases, and fluorinated bases as defined herein. 5-substituted pyrimidines, 6-azapyrimidines and N-2, N-6 and 0-6 substituted purines, including 2-aminopropyladenine, 5-propynyluracil; 5-propynylcytosine; 5-hydroxymethyl cytosine, xanthine, hypoxanthine, 2-aminoadenine, 6-methyl and other alkyl derivatives of adenine and guanine, 2-propyl and other alkyl derivatives of adenine and guanine, 2-thiouracil, 2-thiothymine and 2-thiocytosine, 5-halouracil and cytosine, 5-propynyl (-CC-CH3) uracil and cytosine and other alkynyl derivatives of pyrimidine bases, 6-azo uracil, cytosine and thymine, 5-uracil (pseudouracil), 4-thiouracil, 8-halo, 8-amino, 8-thiol, 8-thioalkyl, 8-hydroxyl and other 8-substituted adenines and guanines, 5-halo particularly 5-bromo, 5-trifluoromethyl and other 5-substituted uracils and cytosines, 7-methylguanine and 7-methyladenine, 2-F-adenine, 2-amino-adenine, 8-azaguanine and 8-azaadenine, 7-deazaguanine and 7-deazaadenine, 3-deazaguanine and 3-deazaadenine, universal bases, hydrophobic bases, promiscuous bases, size-expanded bases, and fluorinated bases as defined herein. Further modified nucleobases include tricyclic pyrimidines such as phenoxazine cytidine( [5,4-b][1,4]benzoxazin-2(3H)-one), phenothiazine cytidine (1H-pyrimido[5,4-b][1,4]benzothiazin-2(3H)-one), G-clamps such as a substituted phenoxazine cytidine (e.g. 9-(2-aminoethoxy)-H-pyrimido[5,4-b][1,4]benzoxazin-2(3H)-one), carbazole cytidine (2H-pyrimido[4,5-b]indo1-2-one), pyridoindole cytidine (H-pyrido[3',2':4,5]pyrrolo[2,3-d]pyrimidin-2-one). Modified nucleobases may also include those in which the purine or pyrimidine base is replaced with other heterocycles, for example 7-deaza-adenine, 7-deazaguanosine, 2-aminopyridine and 2-pyridone. Further nucleobases include those disclosed in United States Patent No. 3,687,808, those disclosed in The Concise Encyclopedia Of Polymer Science And Engineering, Kroschwitz, J.I., Ed., John Wiley & Sons, 1990, 858-859; those disclosed by Englisch et al., Angewandte Chemie, International Edition, 1991, 30, 613; and those disclosed by Sanghvi, Y.S., Chapter 15, Antisense Research and Applications, Crooke, S.T. and Lebleu, B., Eds., CRC Press, 1993, 273-288.
Representative United States patents that teach the preparation of certain of the above noted modified nucleobases as well as other modified nucleobases include without limitation, U.S. 3,687,808;
4,845,205; 5,130,302; 5,134,066; 5,175,273; 5,367,066; 5,432,272; 5,457,187;
5,459,255; 5,484,908;
5,502,177; 5,525,711; 5,552,540; 5,587,469; 5,594,121; 5,596,091; 5,614,617;
5,645,985; 5,681,941;
5,750,692; 5,763,588; 5,830,653 and 6,005,096, certain of which are commonly owned with the instant application, and each of which is herein incorporated by reference in its entirety.
Certain Internucleoside Linkages In certain embodiments, the present invention provides oligomeric compounds comprising linked nucleosides. In such embodiments, nucleosides may be linked together using any internucleoside linkage.
The two main classes of internucleoside linking groups are defined by the presence or absence of a phosphorus atom. Representative phosphorus containing internucleoside linkages include, but are not limited to, phosphodiesters (P=0), phosphotriesters, methylphosphonates, phosphoramidate, and phosphorothioates (P=S). Representative non-phosphorus containing internucleoside linking groups include, but are not limited to, methylenemethylimino (-CH2-N(CH3)-0-CH2-), thiodiester (-0-C(0)-S-), thionocarbamate (-0-C(0)(NH)-S-); siloxane (-0-Si(H)2-0-); and N,N'-dimethylhydrazine (-CH2-N(CH3)-N(CH3)-). Modified linkages, compared to natural phosphodiester linkages, can be used to alter, typically increase, nuclease resistance of the oligomeric compound. In certain embodiments, internucleoside linkages having a chiral atom can be prepared as a racemic mixture, or as separate enantiomers. Representative chiral linkages include, but are not limited to, alkylphosphonates and phosphorothioates. Methods of preparation of phosphorous-containing and non-phosphorous-containing internucleoside linkages are well known to those skilled in the art.
The oligonucleotides described herein contain one or more asymmetric centers and thus give rise to enantiomers, diastereomers, and other stereoisomeric configurations that may be defined, in terms of absolute stereochemistry, as (R) or (S), a or 13 such as for sugar anomers, or as (D) or (L) such as for amino acids etc. Included in the antisense compounds provided herein are all such possible isomers, as well as their racemic and optically pure forms.

Neutral internucleoside linkages include without limitation, phosphotriesters, methylphosphonates, MMI (3'-CH2-N(CH3)-0-5'), amide-3 (3'-CH2-C(=0)-N(H)-5'), amide-4 (3'-CH2-N(H)-C(=0)-5'), formacetal (3'-0-CH2-0-5'), and thioformacetal (3'-S-CH2-0-5'). Further neutral internucleoside linkages include nonionic linkages comprising siloxane (dialkylsiloxane), carboxylate ester, carboxamide, sulfide, sulfonate ester and amides (See for example: Carbohydrate Modifications in Antisense Research; Y .S.
Sanghvi and P.D. Cook, Eds., ACS Symposium Series 580; Chapters 3 and 4, 40-65). Further neutral internucleoside linkages include nonionic linkages comprising mixed N, 0, S
and CH2 component parts.
Certain Motifs In certain embodiments, the present invention provides oligomeric compounds comprising oligonucleotides. In certain embodiments, such oligonucleotides comprise one or more chemical modification. In certain embodiments, chemically modified oligonucleotides comprise one or more modified nucleosides. In certain embodiments, chemically modified oligonucleotides comprise one or more modified nucleosides comprising modified sugars. In certain embodiments, chemically modified oligonucleotides comprise one or more modified nucleosides comprising one or more modified nucleobases. In certain embodiments, chemically modified oligonucleotides comprise one or more modified internucleoside linkages. In certain embodiments, the chemically modifications (sugar modifications, nucleobase modifications, and/or linkage modifications) define a pattern or motif In certain embodiments, the patterns of chemical modifications of sugar moieties, internucleoside linkages, and nucleobases are each independent of one another. Thus, an oligonucleotide may be described by its sugar modification motif, internucleoside linkage motif and/or nucleobase modification motif (as used herein, nucleobase modification motif describes the chemical modifications to the nucleobases independent of the sequence of nucleobases).
Certain sugar motifs In certain embodiments, oligonucleotides comprise one or more type of modified sugar moieties and/or naturally occurring sugar moieties arranged along an oligonucleotide or region thereof in a defined pattern or sugar modification motif Such motifs may include any of the sugar modifications discussed herein and/or other known sugar modifications.
In certain embodiments, the oligonucleotides comprise or consist of a region having a gapmer sugar modification motif, which comprises two external regions or "wings" and an internal region or "gap." The three regions of a gapmer motif (the 5'-wing, the gap, and the 3'-wing) form a contiguous sequence of nucleosides wherein at least some of the sugar moieties of the nucleosides of each of the wings differ from at least some of the sugar moieties of the nucleosides of the gap.
Specifically, at least the sugar moieties of the nucleosides of each wing that are closest to the gap (the 3'-most nucleoside of the 5'-wing and the 5'-most nucleoside of the 3'-wing) differ from the sugar moiety of the neighboring gap nucleosides, thus defining the boundary between the wings and the gap. In certain embodiments, the sugar moieties within the gap are the same as one another. In certain embodiments, the gap includes one or more nucleoside having a sugar moiety that differs from the sugar moiety of one or more other nucleosides of the gap. In certain embodiments, the sugar modification motifs of the two wings are the same as one another (symmetric gapmer). In certain embodiments, the sugar modification motifs of the 5'-wing differs from the sugar modification motif of the 3'-wing (asymmetric gapmer). In certain embodiments, oligonucleotides comprise 2'-MOE modified nucleosides in the wings and 2'-F
modified nucleosides in the gap.
In certain embodiments, oligonucleotides are fully modified. In certain such embodiments, oligonucleotides are uniformly modified. In certain embodiments, oligonucleotides are uniform 2'-M0E.
In certain embodiments, oligonucleotides are uniform 2'-F. In certain embodiments, oligonucleotides are uniform morpholino. In certain embodiments, oligonucleotides are uniform BNA.
In certain embodiments, oligonucleotides are uniform LNA. In certain embodiments, oligonucleotides are uniform cEt.
In certain embodiments, oligonucleotides comprise a uniformly modified region and additional nucleosides that are unmodified or differently modified. In certain embodiments, the uniformly modified region is at least 5, 10, 15, or 20 nucleosides in length. In certain embodiments, the uniform region is a 2'-MOE region. In certain embodiments, the uniform region is a 2'-F region. In certain embodiments, the uniform region is a morpholino region. In certain embodiments, the uniform region is a BNA region. In certain embodiments, the uniform region is a LNA region. In certain embodiments, the uniform region is a cEt region.
In certain embodiments, the oligonucleotide does not comprise more than 4 contiguous unmodified 2'-deoxynucleosides. In certain circumstances, antisesense oligonucleotides comprising more than 4 contiguous 2'-deoxynucleosides activate RNase H, resulting in cleavage of the target RNA. In certain embodiments, such cleavage is avoided by not having more than 4 contiguous 2'-deoxynucleosides, for example, where alteration of splicing and not cleavage of a target RNA is desired.
Certain Internucleoside Linkage Motifs In certain embodiments, oligonucleotides comprise modified internucleoside linkages arranged along the oligonucleotide or region thereof in a defined pattern or modified internucleoside linkage motif In certain embodiments, internucleoside linkages are arranged in a gapped motif, as described above for sugar modification motif In such embodiments, the internucleoside linkages in each of two wing regions are different from the internucleoside linkages in the gap region. In certain embodiments the internucleoside linkages in the wings are phosphodiester and the internucleoside linkages in the gap are phosphorothioate. The sugar modification motif is independently selected, so such oligonucleotides having a gapped internucleoside linkage motif may or may not have a gapped sugar modification motif and if it does have a gapped sugar motif, the wing and gap lengths may or may not be the same.
In certain embodiments, oligonucleotides comprise a region having an alternating internucleoside linkage motif In certain embodiments, oligonucleotides of the present invention comprise a region of uniformly modified internucleoside linkages. In certain such embodiments, the oligonucleotide comprises a region that is uniformly linked by phosphorothioate internucleoside linkages. In certain embodiments, the oligonucleotide is uniformly linked by phosphorothioate. In certain embodiments, each internucleoside linkage of the oligonucleotide is selected from phosphodiester and phosphorothioate. In certain embodiments, each internucleoside linkage of the oligonucleotide is selected from phosphodiester and phosphorothioate and at least one internucleoside linkage is phosphorothioate.
In certain embodiments, the oligonucleotide comprises at least 6 phosphorothioate internucleoside linkages. In certain embodiments, the oligonucleotide comprises at least 8 phosphorothioate internucleoside linkages. In certain embodiments, the oligonucleotide comprises at least 10 phosphoro-thioate internucleoside linkages. In certain embodiments, the oligonucleotide comprises at least one block of at least 6 consecutive phosphorothioate internucleoside linkages. In certain embodiments, the oligonucleotide comprises at least one block of at least 8 consecutive phosphorothioate internucleoside linkages. In certain embodiments, the oligonucleotide comprises at least one block of at least 10 consecutive phosphorothioate internucleoside linkages. In certain embodiments, the oligonucleotide comprises at least block of at least one 12 consecutive phosphorothioate internucleoside linkages. In certain such embodiments, at least one such block is located at the 3' end of the oligonucleotide. In certain such embodiments, at least one such block is located within 3 nucleosides of the 3' end of the oligonucleotide.
In certain embodiments, compounds and compositions, including modified oligonucleotides, are delivered to the CNS. In certain embodiments, compounds and compositions, including modified oligonucleotides, are delivered to the CNS via intracerebroventricular administration or intracerebroventricular bolus administration. In certain embodiments, one or more modified oligonucleotides may exhibit high potency and high selectivity toward a nucleic acid target, but may possess certain degrees of acute toxicity when delivered into the CNS via intracerebroventricular administration. In certain embodiments, introduction of one or more modifications to the internucleoside linkages of the modified oligonucleotide ameliorates or reduces acute toxicity associated with CNS delivery via intracerebroventricular administration. In certain embodiments, introduction of one or more phosphodiester internucleoside linkages into the modified oligonucleotide ameliorates or reduces acute toxicity associated with CNS
delivery via intracerebroventricular administration.
In certain embodiments, an oligomeric compound has an internucleoside linkage motif selected from the table below, wherein each "N" represents a nucleoside, each subscript "s" represents a phosphorothioate internucleoside linkage, and each subscript "o" represents a phosphodiester internucleoside linkage:
Internucleoside Linkage Motifs NsNsNoNsNoNsNoNsNoNsNoNsNoNsNoNsNsN
NsNoNoNoNsNsNsNsNsNsNsNsNoNoNoNsNsN
In certain embodiments, the inclusion of 3, 4, 5, 6, 7, 8, or 9 phosphodiester internucleoside linkages into the modified oligonucleotide ameliorates or reduces acute toxicity associated with CNS
delivery via intracerebroventricular administration.
Certain Nucleobase Modification Motifs In certain embodiments, oligonucleotides comprise chemical modifications to nucleobases arranged along the oligonucleotide or region thereof in a defined pattern or nucleobases modification motif In certain such embodiments, nucleobase modifications are arranged in a gapped motif In certain embodiments, nucleobase modifications are arranged in an alternating motif In certain embodiments, each nucleobase is modified. In certain embodiments, none of the nucleobases is chemically modified.
In certain embodiments, oligonucleotides comprise a block of modified nucleobases. In certain such embodiments, the block is at the 3'-end of the oligonucleotide. In certain embodiments the block is within 3 nucleotides of the 3'-end of the oligonucleotide. In certain such embodiments, the block is at the 5'-end of the oligonucleotide. In certain embodiments the block is within 3 nucleotides of the 5'-end of the oligonucleotide.
In certain embodiments, nucleobase modifications are a function of the natural base at a particular position of an oligonucleotide. For example, in certain embodiments each purine or each pyrimidine in an oligonucleotide is modified. In certain embodiments, each adenine is modified.
In certain embodiments, each guanine is modified. In certain embodiments, each thymine is modified. In certain embodiments, each cytosine is modified. In certain embodiments, each uracil is modified.
In certain embodiments, some, all, or none of the cytosine moieties in an oligonucleotide are 5-methyl cytosine moieties. Herein, 5-methyl cytosine is not a "modified nucleobase." Accordingly, unless otherwise indicated, unmodified nucleobases include both cytosine residues having a 5-methyl and those lacking a 5 methyl. In certain embodiments, the methylation state of all or some cytosine nucleobases is specified.
Certain Overall Lengths In certain embodiments, the present invention provides oligomeric compounds including oligonucleotides of any of a variety of ranges of lengths. In certain embodiments, the invention provides oligomeric compounds or oligonucleotides consisting of X to Y linked nucleosides, where X represents the fewest number of nucleosides in the range and Y represents the largest number of nucleosides in the range.
In certain such embodiments, X and Y are each independently selected from 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, and 50; provided that X<Y. For example, in certain embodiments, the invention provides oligomeric compounds which comprise oligonucleotides consisting of 8 to 9, 8 to 10, 8 to 11, 8 to 12, 8 to 13, 8 to 14, 8 to 15, 8 to 16, 8 to 17, 8 to 18, 8 to 19, 8 to 20, 8 to 21, 8 to 22, 8 to 23, 8 to 24, 8 to 25, 8 to 26, 8 to 27, 8 to 28, 8 to 29, 8 to 30, 9 to 10, 9 to 11, 9 to 12, 9 to 13, 9 to 14, 9 to 15, 9 to 16, 9 to 17, 9 to 18,9 to 19, 9 to 20, 9 to 21, 9 to 22, 9 to 23, 9 to 24, 9 to 25, 9 to 26, 9 to 27, 9 to 28, 9 to 29, 9 to 30, 10 to 11, 10 to 12, 10 to 13, 10 to 14, 10 to 15, 10 to 16, 10 to 17, 10 to 18, 10 to 19, 10 to 20, 10 to 21, 10 to 22, 10 to 23, 10 to 24, 10 to 25, 10 to 26, 10 to 27, 10 to 28, 10 to 29, 10 to 30, 11 to 12,11 to 13,11 to 14,11 to 15,11 to 16,11 to 17,11 to 18,11 to 19,11 to 20, 11 to 21, 11 to 22, 11 to 23, 11 to 24, 11 to 25, 11 to 26, 11 to 27,

11 to 28, 11 to 29, 11 to 30, 12 to 13, 12 to 14, 12 to 15, 12 to 16, 12 to 17, 12 to 18, 12 to 19, 12 to 20, 12 to 21, 12 to 22, 12 to 23, 12 to 24, 12 to 25, 12 to 26, 12 to 27, 12 to 28,

12 to 29, 12 to 30, 13 to 14, 13 to 15,

13 to 16, 13 to 17, 13 to 18, 13 to 19, 13 to 20, 13 to 21, 13 to 22, 13 to 23, 13 to 24, 13 to 25, 13 to 26, 13 to 27, 13 to 28, 13 to 29, 13 to 30, 14 to 15, 14 to 16, 14 to 17, 14 to 18,

14 to 19, 14 to 20, 14 to 21, 14 to 22, 14 to 23, 14 to 24, 14 to 25, 14 to 26, 14 to 27, 14 to 28, 14 to 29, 14 to 30, 15 to 16, 15 to 17, 15 to 18, 15 to 19, 15 to 20, 15 to 21, 15 to 22, 15 to 23, 15 to 24, 15 to 25, 15 to 26,

15 to 27, 15 to 28, 15 to 29, 15 to 30,

16 to 17, 16 to 18, 16 to 19, 16 to 20, 16 to 21, 16 to 22, 16 to 23, 16 to 24, 16 to 25, 16 to 26, 16 to 27,16 to 28, 16 to 29, 16 to 30, 17 to 18, 17 to 19, 17 to 20, 17 to 21, 17 to 22,

17 to 23, 17 to 24, 17 to 25, 17 to 26, 17 to 27, 17 to 28, 17 to 29, 17 to 30, 18 to 19, 18 to 20, 18 to 21, 18 to 22, 18 to 23, 18 to 24, 18 to 25, 18 to 26, 18 to 27, 18 to 28, 18 to 29, 18 to 30, 19 to 20, 19 to 21, 19 to 22, 19 to 23, 19 to 24, 19 to 25, 19 to 26, 19 to 29, 19 to 28, 19 to 29, 19 to 30, 20 to 21, 20 to 22, 20 to 23, 20 to 24, 20 to 25, 20 to 26, 20 to 27, 20 to 28, 20 to 29,20 to 30,21 to 22, 21 to 23, 21 to 24, 21 to 25, 21 to 26,21 to 27,21 to 28,21 to 29,21 to 30, 22 to 23, 22 to 24, 22 to 25, 22 to 26, 22 to 27, 22 to 28, 22 to 29, 22 to 30, 23 to 24, 23 to 25, 23 to 26, 23 to 27, 23 to 28, 23 to 29, 23 to 30, 24 to 25, 24 to 26, 24 to 27, 24 to 28, 24 to 29, 24 to 30, 25 to 26, 25 to 27, 25 to 28, 25 to 29, 25 to 30, 26 to 27, 26 to 28, 26 to 29, 26 to 30, 27 to 28, 27 to 29, 27 to 30, 28 to 29, 28 to 30, or 29 to 30 linked nucleosides. In embodiments where the number of nucleosides of an oligomeric compound or oligonucleotide is limited, whether to a range or to a specific number, the oligomeric compound or oligonucleotide may, nonetheless further comprise additional other substituents. For example, an oligonucleotide comprising 8-30 nucleosides excludes oligonucleotides having 31 nucleosides, but, unless otherwise indicated, such an oligonucleotide may further comprise, for example one or more conjugates, terminal groups, or other substituents. In certain embodiments, a gapmer oligonucleotide has any of the above lengths.
One of skill in the art will appreciate that certain lengths may not be possible for certain motifs.
For example: a gapmer having a 5'-wing region consisting of four nucleotides, a gap consisting of at least six nucleotides, and a 3'-wing region consisting of three nucleotides cannot have an overall length less than 13 nucleotides. Thus, one would understand that the lower length limit is 13 and that the limit of 10 in "10-20" has no effect in that embodiment.
Further, where an oligonucleotide is described by an overall length range and by regions having specified lengths, and where the sum of specified lengths of the regions is less than the upper limit of the overall length range, the oligonucleotide may have additional nucleosides, beyond those of the specified regions, provided that the total number of nucleosides does not exceed the upper limit of the overall length range. For example, an oligonucleotide consisting of 20-25 linked nucleosides comprising a 5'-wing consisting of 5 linked nucleosides; a 3'-wing consisting of 5 linked nucleosides and a central gap consisting of 10 linked nucleosides (5+5+10=20) may have up to 5 nucleosides that are not part of the 5'-wing, the 3'-wing, or the gap (before reaching the overall length limitation of 25).
Such additional nucleosides may be 5' of the 5'-wing and/or 3' of the 3' wing.
Certain Oligonucleotides In certain embodiments, oligonucleotides of the present invention are characterized by their sugar motif, internucleoside linkage motif, nucleobase modification motif and overall length. In certain embodiments, such parameters are each independent of one another. Thus, each internucleoside linkage of an oligonucleotide having a gapmer sugar motif may be modified or unmodified and may or may not follow the gapmer modification pattern of the sugar modifications. Thus, the internucleoside linkages within the wing regions of a sugar-gapmer may be the same or different from one another and may be the same or different from the internucleoside linkages of the gap region. Likewise, such sugar-gapmer oligonucleotides may comprise one or more modified nucleobase independent of the gapmer pattern of the sugar modifications. Herein if a description of an oligonucleotide or oligomeric compound is silent with respect to one or more parameter, such parameter is not limited. Thus, an oligomeric compound described only as having a gapmer sugar motif without further description may have any length, internucleoside linkage motif, and nucleobase modification motif Unless otherwise indicated, all chemical modifications are independent of nucleobase sequence.
Certain Conjugate Groups In certain embodiments, oligomeric compounds are modified by attachment of one or more conjugate groups. In general, conjugate groups modify one or more properties of the attached oligomeric compound including but not limited to pharmacodynamics, pharmacokinetics, stability, binding, absorption, cellular distribution, cellular uptake, charge and clearance.
Conjugate groups are routinely used in the chemical arts and are linked directly or via an optional conjugate linking moiety or conjugate linking group to a parent compound such as an oligomeric compound, such as an oligonucleotide.
Conjugate groups includes without limitation, intercalators, reporter molecules, polyamines, polyamides, polyethylene glycols, thioethers, polyethers, cholesterols, thiocholesterols, cholic acid moieties, folate, lipids, phospholipids, biotin, phenazine, phenanthridine, anthraquinone, adamantane, acridine, fluoresceins, rhodamines, coumarins and dyes. Certain conjugate groups have been described previously, for example: cholesterol moiety (Letsinger et al., Proc. Natl. Acad. Sci. USA, 1989, 86, 6553-6556), cholic acid (Manoharan et al., Bioorg. Med. Chem. Let., 1994, 4, 1053-1060), a thioether, e.g., hexyl-S-tritylthiol (Manoharan et al., Ann. N.Y. Acad. Sci., 1992, 660, 306-309; Manoharan et al., Bioorg.
Med. Chem. Let., 1993, 3, 2765-2770), a thiocholesterol (Oberhauser et al., Nucl. Acids Res., 1992, 20, 533-538), an aliphatic chain, e.g., do-decan-diol or undecyl residues (Saison-Behmoaras et al., EMBO J., 1991, 10, 1111-1118; Kabanov et al., FEBS Lett., 1990, 259, 327-330;
Svinarchuk et al., Biochimie, 1993, 75, 49-54), a phospholipid, e.g., di-hexadecyl-rac-glycerol or triethyl-ammonium 1,2-di-O-hexadecyl-rac-glycero-3-H-phosphonate (Manoharan et al., Tetrahedron Lett., 1995, 36, 3651-3654; Shea et al., Nucl. Acids Res., 1990, 18, 3777-3783), a polyamine or a polyethylene glycol chain (Manoharan et al., Nucleosides & Nucleotides, 1995, 14, 969-973), or adamantane acetic acid (Manoharan et al., Tetrahedron Lett., 1995, 36, 3651-3654), a palmityl moiety (Mishra et al., Biochim. Biophys. Acta, 1995, 1264, 229-237), or an octadecylamine or hexylamino-carbonyl-oxycholesterol moiety (Crooke et al., J. Pharmacol. Exp. Ther., 1996, 277, 923-937).
In certain embodiments, a conjugate group comprises an active drug substance, for example, aspirin, warfarin, phenylbutazone, ibuprofen, suprofen, fen-bufen, ketoprofen, (S)-(+)-pranoprofen, carprofen, dansylsarcosine, 2,3,5-triiodobenzoic acid, flufenamic acid, folinic acid, a benzothiadiazide, chlorothiazide, a diazepine, indo-methicin, a barbiturate, a cephalosporin, a sulfa drug, an antidiabetic, an antibacterial or an antibiotic.
In certain embodiments, conjugate groups are directly attached to oligonucleotides in oligomeric compounds. In certain embodiments, conjugate groups are attached to oligonucleotides by a conjugate linking group. In certain such embodiments, conjugate linking groups, including, but not limited to, bifunctional linking moieties such as those known in the art are amenable to the compounds provided herein. Conjugate linking groups are useful for attachment of conjugate groups, such as chemical stabilizing groups, functional groups, reporter groups and other groups to selective sites in a parent compound such as for example an oligomeric compound. In general a bifunctional linking moiety comprises a hydrocarbyl moiety having two functional groups. One of the functional groups is selected to bind to a parent molecule or compound of interest and the other is selected to bind essentially any selected group such as chemical functional group or a conjugate group. In some embodiments, the conjugate linker comprises a chain structure or an oligomer of repeating units such as ethylene glycol or amino acid units.
Examples of functional groups that are routinely used in a bifunctional linking moiety include, but are not limited to, electrophiles for reacting with nucleophilic groups and nucleophiles for reacting with electrophilic groups. In some embodiments, bifunctional linking moieties include amino, hydroxyl, carboxylic acid, thiol, unsaturations (e.g., double or triple bonds), and the like.
Some nonlimiting examples of conjugate linking moieties include pyrrolidine, 8-amino-3,6-dioxaoctanoic acid (ADO), succinimidyl 4-(N-maleimidomethyl) cyclohexane-l-carboxylate (SMCC) and 6-aminohexanoic acid (AHEX or AHA). Other linking groups include, but are not limited to, substituted C1-C10 alkyl, substituted or unsubstituted C2-C10 alkenyl or substituted or unsubstituted C2-C10alkynyl, wherein a nonlimiting list of preferred substituent groups includes hydroxyl, amino, alkoxy, carboxy, benzyl, phenyl, nitro, thiol, thioalkoxy, halogen, alkyl, aryl, alkenyl and alkynyl.
Conjugate groups may be attached to either or both ends of an oligonucleotide (terminal conjugate groups) and/or at any internal position.
In certain embodiments, conjugate groups are at the 3'-end of an oligonucleotide of an oligomeric compound. In certain embodiments, conjugate groups are near the 3'-end. In certain embodiments, conjugates are attached at the 3' end of an oligomeric compound, but before one or more terminal group nucleosides. In certain embodiments, conjugate groups are placed within a terminal group.
In certain embodiments, the present invention provides oligomeric compounds.
In certain embodiments, oligomeric compounds comprise an oligonucleotide. In certain embodiments, an oligomeric compound comprises an oligonucleotide and one or more conjugate and/or terminal groups.
Such conjugate and/or terminal groups may be added to oligonucleotides having any of the chemical motifs discussed above.
Thus, for example, an oligomeric compound comprising an oligonucleotide having region of alternating nucleosides may comprise a terminal group.

Antisense Compounds In certain embodiments, oligomeric compounds of the present invention are antisense compounds.
Such antisense compounds are capable of hybridizing to a target nucleic acid, resulting in at least one antisense activity. In certain embodiments, antisense compounds specifically hybridize to one or more target nucleic acid. In certain embodiments, a specifically hybridizing antisense compound has a nucleobase sequence comprising a region having sufficient complementarity to a target nucleic acid to allow hybridization and result in antisense activity and insufficient complementarity to any non-target so as to avoid non-specific hybridization to any non-target nucleic acid sequences under conditions in which specific hybridization is desired (e.g., under physiological conditions for in vivo or therapeutic uses, and under conditions in which assays are performed in the case of in vitro assays).
In certain embodiments, the present invention provides antisense compounds comprising oligonucleotides that are fully complementary to the target nucleic acid over the entire length of the oligonucleotide. In certain embodiments, oligonucleotides are 99%
complementary to the target nucleic acid. In certain embodiments, oligonucleotides are 95% complementary to the target nucleic acid. In certain embodiments, such oligonucleotides are 90% complementary to the target nucleic acid.
In certain embodiments, such oligonucleotides are 85% complementary to the target nucleic acid.
In certain embodiments, such oligonucleotides are 80% complementary to the target nucleic acid. In certain embodiments, an antisense compound comprises a region that is fully complementary to a target nucleic acid and is at least 80% complementary to the target nucleic acid over the entire length of the oligonucleotide. In certain such embodiments, the region of full complementarity is from 6 to 14 nucleobases in length.
In certain embodiments antisense compounds and antisense oligonucleotides comprise single-strand compounds. In certain embodiments antisense compounds and antisense oligonucleotides comprise double-strand compounds.
Certain Modified Oligonucleotides In certain embodiments, a modified oligonucleotide has the sequence of SEQ ID
NO. 31. In certain embodiments, a modified oligonucleotide has the sequence of SEQ ID NO. 33. In certain embodiments, a modified oligonucleotide has the sequence of SEQ ID NO.34. In certain embodiments, a modified oligonucleotide has the sequence of SEQ ID NO.35. In certain embodiments, a modified oligonucleotide has the sequence of SEQ ID NO. 36. In certain embodiments, a modified oligonucleotide has the sequence of SEQ ID NO. 37. In certain embodiments, a modified oligonucleotide has the sequence of SEQ ID NO.
45.

In certain embodiments, a modified oligonucleotide has the sequence of SEQ ID
NO. 72. In certain embodiments, a modified oligonucleotide has the sequence of SEQ ID NO.
79. In certain embodiments, a modified oligonucleotide has the sequence of SEQ ID NO. 82. In certain embodiments, a modified oligonucleotide has the sequence of SEQ ID NO. 83. In certain embodiments, a modified oligonucleotide has the sequence of SEQ ID NO. 97. In certain embodiments, a modified oligonucleotide has the sequence of SEQ ID NO. 106. In certain embodiments, a modified oligonucleotide has the sequence of SEQ ID NO. 107. In certain embodiments, a modified oligonucleotide has the sequence of SEQ ID NO. 112. In certain embodiments, a modified oligonucleotide has the sequence of SEQ ID NO.
113. In certain embodiments, a modified oligonucleotide has the sequence of SEQ ID NO. 130. In certain embodiments, a modified oligonucleotide has the sequence of SEQ ID NO.
140.
In certain embodiments, a modified oligonucleotide has the sequence of SEQ ID
NO. 141. In certain embodiments, a modified oligonucleotide has the sequence of SEQ ID NO.
142. In certain embodiments, a modified oligonucleotide has the sequence of SEQ ID NO. 143. In certain embodiments, a modified oligonucleotide has the sequence of SEQ ID NO. 144. In certain embodiments, a modified oligonucleotide has the sequence of SEQ ID NO. 145. In certain embodiments, a modified oligonucleotide has the sequence of SEQ ID NO. 146. In certain embodiments, a modified oligonucleotide has the sequence of SEQ ID NO. 147. In certain embodiments, a modified oligonucleotide has the sequence of SEQ ID NO. 148. In certain embodiments, a modified oligonucleotide has the sequence of SEQ ID NO.
149.
In certain embodiments, a modified oligonucleotide has the sequence of SEQ ID
NO. 150. In certain embodiments, a modified oligonucleotide has the sequence of SEQ ID NO.
151. In certain embodiments, a modified oligonucleotide has the sequence of SEQ ID NO. 152. In certain embodiments, a modified oligonucleotide has the sequence of SEQ ID NO. 153. In certain embodiments, a modified oligonucleotide has the sequence of SEQ ID NO. 157. In certain embodiments, a modified oligonucleotide has the sequence of SEQ ID NO. 158. In certain embodiments, a modified oligonucleotide has the sequence of SEQ ID NO. 160. In certain embodiments, a modified oligonucleotide has the sequence of SEQ ID NO. 200.
Certain Pathways and Mechanisms Associated With Neurodegenerative Disorders In certain embodiments, a neurodegenerative syndrome or disorder may be any neurodegenerative syndrome or disorder associated with Tau. Non limiting examples of a neurodegenerative disorder associated with Tau may include Alzheimer's disease, progressive supranuclear palsy, dementia pugilistica, frontotemporal dementia, parkinsonism linked to chromosome, Lytico-Bodig disease, tangle-predominant dementia, ganglioglioma, gangliocytoma, meningioangiomatosis, subacute sclerosing panencephalitis, lead encephalopathy, tuberous sclerosis, Hallervorden-Spatz disease, Pick's disease, corticobasal ganglionic degeneration, argyrophilic grain disease, supranuclear palsy, corticobasal degeneration, frontotemporal dementia, or frontotemporal lobar degeneration.
In some embodiments, the method of the invention comprises modifying frontotemporal dementia (FTD). In other embodiments, the method of the invention comprises modifying Alzheimer's disease (AD). In yet other embodiments, the method of the invention comprises modifying progressive supranuclear palsy. In other embodiments, the method of the invention comprises modifying corticobasalganglionic degeneration.
In certain embodiments, described herein are compositions and methods of modifying a neurodegenerative syndrome by altering the splicing of a nucleic acid encoding Tau. Tau is a protein found in multiple tissues, but is particularly abundant in axons of neurons. The primary function of Tau is to bind to and stabilize microtubules, which are important structural components of the cytoskeleton involved in mitosis, cytokinesis and vesicular transport. In humans, there are six isoforms of Tau that are generated by alternative splicing of exons 2, 3, and 10. Splicing of exons 2 and 3 at the N-terminus of the protein leads to inclusion of zero, one or two 29 amino acid, acidic domains and is termed ON, 1N, or 2N Tau respectively.
Inclusion of exon 10 at the C-terminus leads to inclusion of the microtubule binding domain encoded by exon 10. Since there are 3 mictrotubule binding domains elsewhere in Tau, this Tau isoform (with exon 10 included) is termed 4R Tau, where R refers to the number of repeats of microtubule binding domains. (Fig.
1). Tau without exon 10 is termed 3R Tau. In healthy subjects, the ratio of 3R:4R Tau is developmentally regulated, with fetal tissues expressing almost exclusively 3R Tau and adult human tissues expressing approximately equal levels of 3R/4R Tau. Deviations from the normal ratio of 3R/4R Tau are characteristic of neurodegenerative syndromes such as FTD Tauopathies.
In certain embodiments, the 4R:3R Tau ratio in the central nervous system of the subject may be normal, low or high. As used herein, a "normal 4R:3R Tau ratio" in the central nervous system signifies a 4R:3R Tau ratio in the central nervous system that is substantially the same as the 4R:3R Tau ratio in the central nervous system of a subject from the same species and of approximately the same age not suffering from a neurodegenerative disease. In certain embodiments, certain antisense oligonucleotide compositions and/or methods decrease the normal 4R:3R Tau ratio in the central nervous system of a subject. In other embodiments, certain antisense oligonucleotide compositions and/or methods decreases a low 4R:3R Tau ratio in the central nervous system of a subject.
In certain embodiments, certain antisense oligonucleotide compositions and/or methods decrease a high 4R:3R Tau ratio in the central nervous system of a subject. In certain embodiments, certain antisense oligonucleotide compositions and/or methods decreases a high 4R:3R Tau ratio caused by a defect in splicing of the nucleic acid encoding Tau in the subject. Defects in splicing of the nucleic acid encoding Tau in the subject may be caused, for instance, by genetic mutations altering the splicing of the nucleic acid encoding Tau and leading to a high 4R:3R Tau ratio. A mutation may be either a substitution mutation or a deletion mutation which creates a new, aberrant, splice element. Non-limiting examples of genetic mutations that may alter the splicing of the nucleic acid encoding Tau and lead to a high 4R:3R Tau ratio may include N279K, P301S, 280, L284L, N296H, N296N, 296N, P301S, G303V, El0+11, E10+12, E10+13, E+10+14 and E10+16, and E10+19.
In certain embodiments, administration of an antisense oligonucleotide decreases the 4R:3R Tau ratio in the central nervous system of a subject by altering the splicing of a nucleic acid encoding Tau.
In certain embodiments, increasing exclusion of exon 10 of a Tau transcript inhibits one or more tau-associated disorders. In certain embodiments, the tau-associated disorder may be any of Alzheimer's Disease, frontotemporal Dementia (FTD), FTDP-17, Progressive Supranuclear Palsy (PSP), Chronic Traumatic Encephalopathy (CTE), Corticobasal Ganglionic Degeneration (CBD), epilepsy, Dravet's Syndrome, dementia pugilistica, parkinsonism linked to chromosome, Lytico-Bodig disease, tangle-predominant dementia, ganglioglioma, gangliocytoma, meningioangiomatosis, subacute sclerosing panencephalitis, lead encephalopathy, tuberous sclerosis, Hallervorden-Spatz disease, Pick's disease, argyrophilic grain disease, supranuclear palsy, corticobasal degeneration, or frontotemporal lobar degeneration.
Certain Target Nucleic Acids and Mechanisms In certain embodiments, antisense compounds comprise or consist of an oligonucleotide comprising a region that is complementary to a target nucleic acid. In certain embodiments, the target nucleic acid is an endogenous RNA molecule. In certain embodiments, the target nucleic acid is a pre-mRNA. In certain embodiments, the target nucleic acid is a tau transcript.
In certain embodiments, the target RNA is a Tau pre-mRNA.
In certain embodiments, an antisense compound is complementary to a region of Tau pre-mRNA.
In certain embodiments, an antisense compound is complementary within a region of Tau pre-mRNA
comprising an exon encoding the 4R isoform. In certain embodiments, an antisense compound is complementary to a region of Tau pre-mRNA comprising an intron-exon splice junction. In certain embodiments, an antisense compound is complementary to a region of Tau pre-mRNA comprising the intron-exon splice junction adjacent to exon 10. In certain embodiments, an antisense compound is complementary to a region of Tau pre-mRNA comprising the intron-exon splice junction between intron 9 and exon 10. In certain embodiments, an antisense compound is complementary to a region of Tau pre-mRNA comprising the intron-exon splice junction between exon 10 and intron 10. In certain embodiments, an antisense compound is complementary within a region of Tau pre-mRNA consisting of exon 10.
In certain embodiments, an antisense compound is complementary within a region of Tau pre-mRNA comprising an exonic splicing silencer within exon 10. In certain embodiments, an antisense compound is complementary within a region of Tau pre-mRNA comprising an exonic splicing enhancer within exon 10.
In certain embodiments, an antisense compound comprises a modified oligonucleotide consisting of 8 to 30 linked nucleosides and having a nucleobase sequence comprising a complementary region comprising at least 8 contiguous nucleobases complementary to a target region of equal length of a Tau transcript.
In certain embodiments, the target region is within nucleobase 121708 and nucleobase 122044 of SEQ ID NO.: 1. In certain embodiments, the target region is within nucleobase 121796 and nucleobase 122044 of SEQ ID NO.: 1. In certain embodiments, the target region is within nucleobase 121796 and nucleobase 121885 of SEQ ID NO.: 1. In certain embodiments, the target region is within nucleobase 121873 and nucleobase 121898 of SEQ ID NO.: 1. In certain embodiments, the target region is within nucleobase 121869 and nucleobase 121943 of SEQ ID NO.: 1. In certain embodiments, the target region is within nucleobase 122020 and nucleobase 122044 of SEQ ID NO.: 1. In certain embodiments, the target region is within nucleobase 121881 and nucleobase 121898 of SEQ ID NO.: 1. In certain embodiments, the target region is within nucleobase 121880 and nucleobase 121897 of SEQ ID
NO.: 1. In certain embodiments, the target region is within nucleobase 121879 and nucleobase 121896 of SEQ ID NO.: 1.
In certain embodiments, the target region is within nucleobase 121878 and nucleobase 121895 of SEQ ID NO.: 1. In certain embodiments, the target region is within nucleobase 121877 and nucleobase 121894 of SEQ ID NO.: 1. In certain embodiments, the target region is within nucleobase 121876 and nucleobase 121893 of SEQ ID NO.: 1. In certain embodiments, the target region is within nucleobase 121875 and nucleobase 121892 of SEQ ID NO.: 1. In certain embodiments, the target region is within nucleobase 121874 and nucleobase 121891 of SEQ ID NO.: 1. In certain embodiments, the target region is within nucleobase 121873 and nucleobase 121890 of SEQ ID NO.: 1.
In certain embodiments, an antisense oligonucleotide modulates splicing of a pre-mRNA. In certain embodiments, an antisense oligonucleotide modulates splicing a Tau pre-mRNA. In certain embodiments, an antisense oligonucleotide increases the amount of Tau 3R mRNA.
In certain embodiments, an antisense oligonucleotide increases the exclusion of exon 10 in Tau mRNA. In certain embodiments, an antisense oligonucleotide decreases the inclusion of exon 10 in Tau mRNA. In certain embodiments, an antisense oligonucleotide increases the amount of 3R Tau mRNA.
In certain embodiments, an antisense oligonucleotide decreases the amount of 4R Tau mRNA.
In certain embodiments it is desirable to alter the splicing of Tau pre-mRNA
to exclude exon 10.
By altering the splicing of Tau pre-mRNA to exclude exon 10, expression of 3R
Tau will increase and expression of 4R Tau will decrease. In certain embodiments it is desirable to alter the splicing of Tau pre-mRNA to decrease expression of 4R Tau.

In certain embodiments, an antisense oligonucleotide decreases the amount of Tau 3R mRNA. In certain embodiments, an antisense oligonucleotide decreases the exclusion of exon 10 in Tau mRNA. In certain embodiments, an antisense oligonucleotide increases the inclusion of exon 10 in Tau mRNA. In certain embodiments, an antisense oligonucleotide decreases the amount of 3R
Tau mRNA. In certain embodiments, an antisense oligonucleotide increases the amount of 4R Tau mRNA.
In certain embodiments it is desirable to alter the splicing of Tau pre-mRNA to include exon 10, for example to produce a phenotypic effect in a mouse or animal model.
Certain Pharmaceutical Compositions In certain embodiments, the present invention provides pharmaceutical compositions comprising one or more antisense compound. In certain embodiments, such pharmaceutical composition comprises a suitable pharmaceutically acceptable diluent or carrier. In certain embodiments, a pharmaceutical composition comprises a sterile saline solution and one or more antisense compound. In certain embodiments, such pharmaceutical composition consists of a sterile saline solution and one or more antisense compound. In certain embodiments, the sterile saline is pharmaceutical grade saline. In certain embodiments, a pharmaceutical composition comprises one or more antisense compound and sterile water.
In certain embodiments, a pharmaceutical composition consists of one or more antisense compound and sterile water. In certain embodiments, the sterile saline is pharmaceutical grade water. In certain embodiments, a pharmaceutical composition comprises one or more antisense compound and phosphate-buffered saline (PBS). In certain embodiments, a pharmaceutical composition consists of one or more antisense compound and sterile phosphate-buffered saline (PBS). In certain embodiments, the sterile saline is pharmaceutical grade PBS.
In certain embodiments, antisense compounds may be admixed with pharmaceutically acceptable active and/or inert substances for the preparation of pharmaceutical compositions or formulations.
Compositions and methods for the formulation of pharmaceutical compositions depend on a number of criteria, including, but not limited to, route of administration, extent of disease, or dose to be administered.
Pharmaceutical compositions comprising antisense compounds encompass any pharmaceutically acceptable salts, esters, or salts of such esters. In certain embodiments, pharmaceutical compositions comprising antisense compounds comprise one or more oligonucleotide which, upon administration to an animal, including a human, is capable of providing (directly or indirectly) the biologically active metabolite or residue thereof Accordingly, for example, the disclosure is also drawn to pharmaceutically acceptable salts of antisense compounds, prodrugs, pharmaceutically acceptable salts of such prodrugs, and other bioequivalents. Suitable pharmaceutically acceptable salts include, but are not limited to, sodium and potassium salts.

A prodrug can include the incorporation of additional nucleosides at one or both ends of an oligomeric compound which are cleaved by endogenous nucleases within the body, to form the active antisense oligomeric compound.
Lipid moieties have been used in nucleic acid therapies in a variety of methods. In certain such methods, the nucleic acid is introduced into preformed liposomes or lipoplexes made of mixtures of cationic lipids and neutral lipids. In certain methods, DNA complexes with mono- or poly-cationic lipids are formed without the presence of a neutral lipid. In certain embodiments, a lipid moiety is selected to increase distribution of a pharmaceutical agent to a particular cell or tissue. In certain embodiments, a lipid moiety is selected to increase distribution of a pharmaceutical agent to fat tissue. In certain embodiments, a lipid moiety is selected to increase distribution of a pharmaceutical agent to muscle tissue.
In certain embodiments, pharmaceutical compositions provided herein comprise one or more modified oligonucleotides and one or more excipients. In certain such embodiments, excipients are selected from water, salt solutions, alcohol, polyethylene glycols, gelatin, lactose, amylase, magnesium stearate, talc, silicic acid, viscous paraffin, hydroxymethylcellulose and polyvinylpyrrolidone.
In certain embodiments, a pharmaceutical composition provided herein comprises a delivery system. Examples of delivery systems include, but are not limited to, liposomes and emulsions. Certain delivery systems are useful for preparing certain pharmaceutical compositions including those comprising hydrophobic compounds. In certain embodiments, certain organic solvents such as dimethylsulfoxide are used.
In certain embodiments, a pharmaceutical composition provided herein comprises one or more tissue-specific delivery molecules designed to deliver the one or more pharmaceutical agents of the present invention to specific tissues or cell types. For example, in certain embodiments, pharmaceutical compositions include liposomes coated with a tissue-specific antibody.
In certain embodiments, a pharmaceutical composition provided herein comprises a co-solvent system. Certain of such co-solvent systems comprise, for example, benzyl alcohol, a nonpolar surfactant, a water-miscible organic polymer, and an aqueous phase. In certain embodiments, such co-solvent systems are used for hydrophobic compounds. A non-limiting example of such a co-solvent system is the VPD
co-solvent system, which is a solution of absolute ethanol comprising 3% w/v benzyl alcohol, 8% w/v of the nonpolar surfactant Polysorbate 8OTM and 65% w/v polyethylene glycol 300.
The proportions of such co-solvent systems may be varied considerably without significantly altering their solubility and toxicity characteristics. Furthermore, the identity of co-solvent components may be varied: for example, other surfactants may be used instead of Polysorbate 8OTM; the fraction size of polyethylene glycol may be varied;
other biocompatible polymers may replace polyethylene glycol, e.g., polyvinyl pyrrolidone; and other sugars or polysaccharides may substitute for dextrose.

In certain embodiments, a pharmaceutical composition provided herein is prepared for oral administration. In certain embodiments, pharmaceutical compositions are prepared for buccal administration.
In certain embodiments, a pharmaceutical composition is prepared for administration by injection (e.g., intravenous, subcutaneous, intramuscular, etc.). In certain of such embodiments, a pharmaceutical composition comprises a carrier and is formulated in aqueous solution, such as water or physiologically compatible buffers such as Hanks's solution, Ringer's solution, or physiological saline buffer. In certain embodiments, other ingredients are included (e.g., ingredients that aid in solubility or serve as preservatives). In certain embodiments, injectable suspensions are prepared using appropriate liquid carriers, suspending agents and the like. Certain pharmaceutical compositions for injection are presented in unit dosage form, e.g., in ampoules or in multi-dose containers. Certain pharmaceutical compositions for injection are suspensions, solutions or emulsions in oily or aqueous vehicles, and may contain formulatory agents such as suspending, stabilizing and/or dispersing agents. Certain solvents suitable for use in pharmaceutical compositions for injection include, but are not limited to, lipophilic solvents and fatty oils, such as sesame oil, synthetic fatty acid esters, such as ethyl oleate or triglycerides, and liposomes. Aqueous injection suspensions may contain substances that increase the viscosity of the suspension, such as sodium carboxymethyl cellulose, sorbitol, or dextran. Optionally, such suspensions may also contain suitable stabilizers or agents that increase the solubility of the pharmaceutical agents to allow for the preparation of highly concentrated solutions.
In certain embodiments, a pharmaceutical composition is prepared for transmucosal administration. In certain of such embodiments penetrants appropriate to the barrier to be permeated are used in the formulation. Such penetrants are generally known in the art.
In certain embodiments, a pharmaceutical composition provided herein comprises an oligonucleotide in a therapeutically effective amount. In certain embodiments, the therapeutically effective amount is sufficient to prevent, alleviate or ameliorate symptoms of a disease or to prolong the survival of the subject being treated. Determination of a therapeutically effective amount is well within the capability of those skilled in the art.
In certain embodiments, one or more modified oligonucleotide provided herein is formulated as a prodrug. In certain embodiments, upon in vivo administration, a prodrug is chemically converted to the biologically, pharmaceutically or therapeutically more active form of an oligonucleotide. In certain embodiments, prodrugs are useful because they are easier to administer than the corresponding active form.
For example, in certain instances, a prodrug may be more bioavailable (e.g., through oral administration) than is the corresponding active form. In certain instances, a prodrug may have improved solubility compared to the corresponding active form. In certain embodiments, prodrugs are less water soluble than the corresponding active form. In certain instances, such prodrugs possess superior transmittal across cell membranes, where water solubility is detrimental to mobility. In certain embodiments, a prodrug is an ester.
In certain such embodiments, the ester is metabolically hydrolyzed to carboxylic acid upon administration.
In certain instances the carboxylic acid containing compound is the corresponding active form. In certain embodiments, a prodrug comprises a short peptide (polyaminoacid) bound to an acid group. In certain of such embodiments, the peptide is cleaved upon administration to form the corresponding active form.
In certain embodiments, the present invention provides compositions and methods for reducing the amount or activity of a target nucleic acid in a cell. In certain embodiments, the cell is in an animal. In certain embodiments, the animal is a mammal. In certain embodiments, the animal is a rodent. In certain embodiments, the animal is a primate. In certain embodiments, the animal is a non-human primate. In certain embodiments, the animal is a human.
In certain embodiments, the present invention provides methods of administering a pharmaceutical composition comprising an oligomeric compound of the present invention to an animal. Suitable administration routes include, but are not limited to, oral, rectal, transmucosal, intestinal, enteral, topical, suppository, through inhalation, intrathecal, intracerebroventricular, intraperitoneal, intranasal, intraocular, intratumoral, and parenteral (e.g., intravenous, intramuscular, intramedullary, and subcutaneous). In certain embodiments, pharmaceutical intrathecals are administered to achieve local rather than systemic exposures. For example, pharmaceutical compositions may be injected directly in the area of desired effect (e.g., into the eyes, ears).
In certain embodiments, a pharmaceutical composition is administered to an animal having at least one Tau-associated disorder. In certain embodiments, such administration results in reduction in expression of the 4R isoform. In certain embodiments, a pharmaceutical composition is administered to an animal having at least one symptom associated with a Tau-associated disorder.
In certain embodiments, such administration results in amelioration of at least one symptom. In certain embodiments, administration of a pharmaceutical composition to an animal results in a decrease of 4R mRNA in a cell of the animal. In certain embodiments, such administration results in an increase in 3R mRNA. In certain embodiments, such administration results in a decrease in 4R protein and an increase 3R protein. In certain embodiments, a 3R protein is preferred over a 4R protein. In certain embodiments, the administration of certain antisense oligonucleotides delays the onset of one or more Tau-associated disorders. In certain embodiments, the administration of certain antisense oligonucleotides prevents or reduces seizures. In certain embodiments, the administration of certain antisense oligonucleotides causes the amount of 4R protein to decrease in the CNS. In certain embodiments, the administration of certain antisense oligonucleotides rescues cellular phenotype.

Nonlimiting disclosure and incorporation by reference While certain compounds, compositions and methods described herein have been described with specificity in accordance with certain embodiments, the following examples serve only to illustrate the compounds described herein and are not intended to limit the same. Each of the references, GenBank accession numbers, and the like recited in the present application is incorporated herein by reference in its entirety.
Although the sequence listing accompanying this filing identifies each sequence as either "RNA"
or "DNA" as required, in reality, those sequences may be modified with any combination of chemical modifications. One of skill in the art will readily appreciate that such designation as "RNA" or "DNA" to describe modified oligonucleotides is, in certain instances, arbitrary. For example, an oligonucleotide comprising a nucleoside comprising a 2'-OH sugar moiety and a thymine base could be described as a DNA
having a modified sugar (2'-OH for the natural 2'-H of DNA) or as an RNA
having a modified base (thymine (methylated uracil) for natural uracil of RNA).
Accordingly, nucleic acid sequences provided herein, including, but not limited to those in the sequence listing, are intended to encompass nucleic acids containing any combination of natural or modified RNA and/or DNA, including, but not limited to such nucleic acids having modified nucleobases.
By way of further example and without limitation, an oligomeric compound having the nucleobase sequence "ATCGATCG" encompasses any oligomeric compounds having such nucleobase sequence, whether modified or unmodified, including, but not limited to, such compounds comprising RNA bases, such as those having sequence "AUCGAUCG" and those having some DNA bases and some RNA bases such as "AUCGATCG" and oligomeric compounds having other modified or naturally occurring bases, such as "ArleCGAUCG," wherein nieC indicates a cytosine base comprising a methyl group at the 5-position.
EXAMPLES
Non-limiting disclosure and incorporation by reference While certain compounds, compositions and methods described herein have been described with specificity in accordance with certain embodiments, the following examples serve only to illustrate the compounds described herein and are not intended to limit the same. Each of the references recited in the present application is incorporated herein by reference in its entirety.
Example 1: Effects of uniform 2'-MOE modified oligonucleotides on human Tau exon 10 A series of modified oligonucleotides were designed to target exon 10 of human Tau and were screened for their effects in reducing exon 10 inclusion in vitro. These modified oligonucleotides were designed by shifting 4 nucleotides upstream or downstream (i.e. microwalk) across the target site. They are 18 nucleosides in length, wherein each nucleoside has a 2'-MOE
modification. Each internucleoside linkage throughout the modified oligonucleotide are phosphorothioate internucleoside linkages (P=S).
All cytosine residues throughout the modified oligonucleotides are 5-methylcytosines.
"Start site" indicates the 5'-most nucleoside to which the modified oligonucleotide is targeted.
"Stop site" indicates the 3'-most nucleoside to which the modified oligonucleotide is targeted. Each modified oligonucleotide listed in the tables below is targeted to SEQ ID NO:
1 (GENBANK Accession No NT 010783.15 truncated from nucleotides 9240000 to 9381000).
A172 cells were transfected using Lipofectamine20000 with 5 nM concentration of modified oligonucleotide. After a treatment period of approximately 24 hours, RNA was isolated from the cells and the mRNA levels of Tau transcripts containing exon 10 were measured by quantitative real-time PCR.
Human primer probe set 9_10 or 10_11 was used to measure mRNA levels. Tau exon 10 mRNA levels were adjusted according to total RNA content, as measured by RIBOGREENO.
Results are presented as percent of Tau exon 10 mRNA expression, relative to untreated control levels and is denoted as "%
UT C."
Human primer probe set 9_10 (forward sequence CACTGAGAACCTGAAGCACC, designated herein as SEQ ID NO: 2; reverse sequence GGACTGGACGTTGCTAAGATC, designated herein as SEQ
ID NO: 3; probe sequence TTAATTATCTGCACCTTCCCGCCTCC, designated herein as SEQ
ID NO:
4).
Human primer probe set 10_11 (forward sequence GGATAATATCAAACACGTCCCG, designated herein as SEQ ID NO: 5; reverse sequence TGCCTAATGAGCCACACTTG, designated herein as SEQ ID NO: 6; probe sequence GTCTACAAACCAGTTGACCTGAGC, designated herein as SEQ ID NO: 7) .
As illustrated in Tables 1 and 2, ISIS 549583, 549584, 549585, 549586, 549595, 549571, 549566, 549570, 549587, 549568, 549617, 549567, 549576, 549577, 549580, and 549581 show 70% or greater reduction in human Tau exon 10 inclusion comparing to untreated control.
Table 1 Effects of uniform 2'-MOE modified oligonucleotides on human Tau exon 10 using Primer Probe Set 9_10 ISIS NO Sequence % UTC SEQ ID NO: SEQ ID NO: SEQ ID
1 Start Site 1 Stop Site NO

549549 TTCGATGAGTGACATGCG 70.0 121736 121753 14 549608 GT GTAC GCACT CACAC CA 80.6 121976 121993 57 549609 GCAAGT GTAC GCACT CAC 49.9 121980 121997 58 549610 TCTCGCAAGTGTACGCAC 86.5 121984 122001 59 549611 AGTGTCTCGCAAGTGTAC 62.4 121988 122005 60 549612 AT GCAGT GT CTC GCAAGT 46.4 121992 122009 61 549613 TTCTATGCAGTGTCTCGC 46.6 121996 122013 62 549614 TTTATTCTATGCAGTGTC 33.2 122000 122017 63 549615 AGGATTTATTCTATGCAG 34.3 122004 122021 64 549616 AAGAAGGATTTATTCTAT 46.5 122008 122025 65 549617 GC C CAAGAAGGATTTATT 29.6 122012 122029 66 549618 GAGAGCCCAAGAAGGATT 38.6 122016 122033 67 549619 TCCTGAGAGCCCAAGAAG 36.9 122020 122037 68 549620 CAGAT C CT GAGAGC C CAA 38.3 122024 122041 69 Table 2 Effects of uniform 2'-MOE modified oligonucleotides on human Tau exon 10 using Primer Probe Set 10 11 SEQ ID NO: 1 SEQ ID NO: 1 . , SEQ
ISIS No. Sequence % UTC
Start Site Stop Site Mismatches ID No.

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32 549608 GTGTACGCACTCACACCA 77.2 121976 121993 0 549609 GCAAGTGTACGCACTCAC 53.0 121980 121997 0 549610 TCTCGCAAGTGTACGCAC 87.4 121984 122001 0 549611 AGTGTCTCGCAAGTGTAC 69.2 121988 122005 0 549612 ATGCAGTGTCTCGCAAGT 43.3 121992 122009 0 549613 TTCTATGCAGTGTCTCGC 41.4 121996 122013 0 549614 TTTATTCTATGCAGTGTC 29.2 122000 122017 0 549615 AGGATTTATTCTATGCAG 30.9 122004 122021 0 549616 AAGAAGGATTTATTCTAT 45.8 122008 122025 0 549617 GCCCAAGAAGGATTTATT 31.8 122012 122029 0 549618 GAGAGCCCAAGAAGGATT 41.8 122016 122033 0 549619 TCCTGAGAGCCCAAGAAG 41.7 122020 122037 0 549620 CAGATCCTGAGAGCCCAA 35.6 122024 122041 0 Example 2: Effects of uniform 2'-MOE modified oligonucleotides on human Tau exon 10 A series of modified oligonucleotides were designed to target exon 10 of human Tau and were screened for their effects in reducing exon 10 inclusion in vitro. These modified oligonucleotides were designed by shifting 1 nucleotide upstream or downstream (i.e. microwalk) across the target site. They are 18 nucleosides in length, wherein each nucleoside has a 2'-MOE modification.
Each internucleoside linkage throughout the modified oligonucleotide are phosphorothioate internucleoside linkages (P=S).
All cytosine residues throughout the modified oligonucleotides are 5-methylcytosines.
"Start site" indicates the 5'-most nucleoside to which the modified oligonucleotide is targeted.
"Stop site" indicates the 3'-most nucleoside to which the modified oligonucleotide is targeted. Each modified oligonucleotide listed in the tables below is targeted to SEQ ID NO:
1 (GENBANK Accession No NT 010783.15 truncated from nucleotides 9240000 to 9381000).
A172 cells were transfected using Lipofectamine20000 with 5 nM concentration of modified oligonucleotide. After a treatment period of approximately 24 hours, RNA was isolated from the cells and the mRNA levels of Tau transcripts containing exon 10 were measured by quantitative real-time PCR.
Human Tau primer probe set 10_11 or 9_10 R5 was used to measure mRNA levels.
Tau exon 10 mRNA
levels were adjusted according to total RNA content, as measured by RIBOGREENO. Results are presented as percent of Tau exon 10 mRNA expression, relative to untreated control levels and is denoted as "% UTC."
Human primer probe set 10_11 (forward sequence GGATAATATCAAACACGTCCCG, designated herein as SEQ ID NO: 5; reverse sequence TGCCTAATGAGCCACACTTG, designated herein as SEQ ID NO: 6; probe sequence GTCTACAAACCAGTTGACCTGAGC, designated herein as SEQ ID NO: 7).

Human Tau primer probe set 9_10 R5 (forward sequence CACTGAGAACCTGAAGCACC, designated herein as SEQ ID NO: 2; reverse sequence GGACGTTGCTAAGATCCAGCT, designated herein as SEQ ID NO: 3; probe sequence TTAATTATCTGCACCTTCCCGCCTCC, designated herein as SEQ ID NO: 4).
Table 3 Effects of uniform 2'-MOE modified oligonucleotides on human Tau exon 10 using Human Tau primer probe set 10_11 ISIS NO Sequence % UTC SEQ ID NO: 1 SEQ ID NO: SEQ ID
Start Site 1 Stop Site NO

Table 4 Effects of uniform 2'-MOE modified oligonucleotides on human Tau exon 10 using Human Tau primer probe set 9_10 R5 ISIS NO Sequence % UTC SEQ ID NO: 1 SEQ ID NO: SEQ ID
Start Site 1 Stop Site NO

Example 3: Inhibitory effect of uniform 2'-MOE modified oligonucleotides on human Tau exon Several modified oligonucleotides from Tables 3 and 4 were selected and further evaluated for 5 their effects on inhibiting human Tau exon 10 expression in vitro. ISIS
549595 was included in the study for comparison.
"Start site" indicates the 5'-most nucleoside to which the modified oligonucleotide is targeted.
"Stop site" indicates the 3'-most nucleoside to which the modified oligonucleotide is targeted. Each modified oligonucleotide listed in the tables below is targeted to SEQ ID NO:
1 (GENBANK Accession No 10 NT 010783.15 truncated from nucleotides 9240000 to 9381000).
A172 cells were transfected using Lipofectamine20000 with 0, 0.1, 0.3, 1, 3, 10, or 30 nM
concentration of modified oligonucleotide as specified in the table below.
After a treatment period of approximately 24 hours, RNA was isolated from the cells and the mRNA levels of Tau transcripts containing exon 10 were measured by quantitative real-time PCR. Human Tau primer probe set 9_10 R5 was used to measure mRNA levels, except for ISIS 549581. Human Tau primer probe set 10_11 was used for this oligonucleotide. Human Tau exon 10 mRNA levels were adjusted according to total RNA
content, as measured by RIBOGREENO.
The half maximal inhibitory concentration (IC50) of each oligonucleotide is presented in the table below and was calculated by plotting the concentrations of oligonucleotides used versus the percent inhibition of human Tau exon 10 mRNA expression achieved at each concentration, and noting the concentration of oligonucleotide at which 50% inhibition of human Tau exon 10 mRNA expression was achieved compared to the control. Results are presented below.
Table 5 Inhibitory effect of uniform 2'-MOE modified oligonucleotides on human Tau exon 10 expression SEQ ID NO: SEQ ID NO: SEQ ID
ISIS NO Sequence IC50 (nM) 1 Start Site 1 Stop Site NO
549581 TGAGCCACACTTGGACTG 1.20 121868 121885 617354 TTGAGCCACACTTGGACT 1.39 121869 121886 143 617355 TTTGAGCCACACTTGGAC 1.08 121870 121887 144 617356 CTTTGAGCCACACTTGGA 0.74 121871 121888 145 549582 CCTTTGAGCCACACTTGG 0.49 121872 121889 146 617357 TCCTTTGAGCCACACTTG 0.64 121873 121890 147 617358 ATCCTTTGAGCCACACTT 0.44 121874 121891 148 617359 TATCCTTTGAGCCACACT 0.54 121875 121892 149 549583 TTATCCTTTGAGCCACAC 0.37 121876 121893

33 617360 ATTATCCTTTGAGCCACA 0.39 121877 121894 150 617361 TATTATCCTTTGAGCCAC 0.38 121878 121895 151 549595 GGACGTGTGAAGGTACTC 0.97 121924 121941 Example 4: Inhibitory effect of uniform 2'-MOE modified oligonucleotides on human Tau exon Several modified oligonucleotides from Table 4 were selected and further evaluated for their effects on inhibiting human Tau exon 10 expression in vitro. ISIS 549595 was included in the study for comparison.
"Start site" indicates the 5'-most nucleoside to which the modified oligonucleotide is targeted.
"Stop site" indicates the 3'-most nucleoside to which the modified oligonucleotide is targeted. Each 10 modified oligonucleotide listed in the tables below is targeted to SEQ
ID NO: 1 (GENBANK Accession No NT 010783.15 truncated from nucleotides 9240000 to 9381000).
A172 cells were transfected using Lipofectamine20000 with 0, 0.1, 0.3, 1, 3, 10, or 30 nM
concentration of modified oligonucleotide as specified in the table below.
After a treatment period of approximately 24 hours, RNA was isolated from the cells and the mRNA levels of Tau transcripts containing exon 10 were measured by quantitative real-time PCR. Human Tau primer probe set 9_10 R5 was used to measure mRNA levels. Human Tau exon 10 mRNA levels were adjusted according to total RNA content, as measured by RIBOGREENO.
The IC50 of each oligonucleotide was calculated in the same manner as illustrated in Example 3 and the results are presented below.

Table 6 Inhibitory effect of uniform 2'-MOE modified oligonucleotides on human Tau exon 10 expression SEQ ID NO: SEQ ID NO: SEQ ID
ISIS NO Sequence IC50(nM) 1 Start Site 1 Stop Site NO
617362 ATATTATCCTTTGAGCCA 0.27 121879 121896 549584 GATATTATCCTTTGAGCC 0.40 121880 121897

34 565989 TGATATTATCCTTTGAGC 0.58 121881 121898 153 565990 TTGATATTATCCTTTGAG 1.23 121882 121899 154 549585 GTTTGATATTATCCTTTG 0.71 121884 121901 35 617364 GTGTTTGATATTATCCTT 0.61 121886 121903 157 617365 CGTGTTTGATATTATCCT 0.74 121887 121904 158 549586 ACGTGTTTGATATTATCC 0.93 121888 121905 617367 GGACGTGTTTGATATTAT 0.64 121890 121907 549587 CGGGACGTGTTTGATATT 0.97 121892 121909 549620 CAGATCCTGAGAGCCCAA 3.46 122024 122041 549595 GGACGTGTGAAGGTACTC 1.25 121924 121941 Example 5: Inhibitory effect of uniform 2'-MOE modified oligonucleotides on human Tau exon Several modified oligonucleotides from Tables 3 and 4 were selected and further evaluated for their effects on inhibiting human Tau exon 10 expression in vitro. ISIS 549595 was included in the study for comparison.

"Start site" indicates the 5'-most nucleoside to which the modified oligonucleotide is targeted.
"Stop site" indicates the 3'-most nucleoside to which the modified oligonucleotide is targeted. Each modified oligonucleotide listed in the tables below is targeted to SEQ ID NO:
1 (GENBANK Accession No NT 010783.15 truncated from nucleotides 9240000 to 9381000).
A172 cells were transfected using Lipofectamine20000 with 0, 0.1, 0.3, 1, 3, 10, or 30 nM
concentrations of modified oligonucleotide as specified in the table below.
After a treatment period of approximately 24 hours, RNA was isolated from the cells and the mRNA levels of Tau transcripts containing exon 10 were measured by quantitative real-time PCR. Human Tau primer probe set 10_11 was used to measure mRNA levels, except for ISIS 549595. Human Tau primer probe set 9_10 R5 was used for this oligonucleotide. Human Tau exon 10 mRNA levels were adjusted according to total RNA
content, as measured by RIBOGREENO.
The IC50 of each oligonucleotide was calculated in the same manner as illustrated in Example 3 and the results are presented below.
Table 7 Inhibitory effect of uniform 2'-MOE modified oligonucleotides on human Tau exon 10 expression SEQ ID
SEQ ID NO: SEQ ID
ISIS NO Sequence IC50(nM) NO: 1 Start 1 Stop Site NO
Site 549566 AGCCAGAAAAAAGGATGA 1.00 121804 121821 31 617309 CACCTTTGGTAGCCAGAA 1.11 121814 121831 97 549570 TAATTATCTGCACCTTTG 1.39 121824 121841 72 617317 TTAATTATCTGCACCTTT 1.26 121825 121842 106 617318 ATTAATTATCTGCACCTT 1.21 121826 121843 107 617323 TTCTTATTAATTATCTGC 0.96 121831 121848 112 617324 CTTCTTATTAATTATCTG 1.06 121832 121849 113 617341 GGACGTTGCTAAGATCCA 0.82 121851 121868 130 549577 TGGACGTTGCTAAGATCC 0.87 121852 121869 79 617351 GCCACACTTGGACTGGAC 0.91 121865 121882 140 617352 AGCCACACTTGGACTGGA 0.79 121866 121883 141 549595 GGACGTGTGAAGGTACTC 0.73 121924 121941 45 Example 6: Inhibitory effect of uniform 2'-MOE modified oligonucleotides on human Tau exon Several modified oligonucleotides from Tables 1 and 4 were selected and further evaluated for their effect on inhibiting human Tau exon 10 expression in vitro. ISIS 617782, 617781, and 415833 were included in the study for comparison.
"Start site" indicates the 5'-most nucleoside to which the modified oligonucleotide is targeted.
"Stop site" indicates the 3'-most nucleoside to which the modified oligonucleotide is targeted. Each modified oligonucleotide listed in the tables below is targeted to SEQ ID NO:
1 (GENBANK Accession No NT 010783.15 truncated from nucleotides 9240000 to 9381000).

ISIS 617782 is 21 nucleosides in length, wherein each nucleoside has a 2'-OCH3 modification and is denoted as the subscript "m". Each internucleoside linkage throughout the modified oligonucleotide are phosphorothioate internucleoside linkages (P=S).
ISIS 617781 is 18 nucleosides in length, wherein each nucleoside has a 2'-OCH3 modification and is denoted as the subscript "m". Each internucleoside linkage throughout the modified oligonucleotide are phosphorothioate internucleoside linkages (P=S).
ISIS 415833 is 20 nucleosides in length, wherein each nucleoside has a 2'-MOE
modification.
Each internucleoside linkage throughout the modified oligonucleotide are phosphorothioate internucleoside linkages (P=S). All cytosine residues throughout the modified oligonucleotides are 5-methylcytosines. "
A172 cells were transfected using Lipofectamine20000 with 0, 0.1, 0.3, 1, 3, 10, or 30 nM
concentration of modified oligonucleotide as specified in the table below.
After a treatment period of approximately 24 hours, RNA was isolated from the cells and the mRNA levels of Tau transcripts containing exon 10 were measured by quantitative real-time PCR. Human Tau primer probe set 9_10 R5 was used to measure mRNA levels, except for ISIS 617781 and 415883. Human Tau primer probe set 10_11 was used for these two oligonucleotides. Human Tau exon 10 mRNA levels were adjusted according to total RNA content, as measured by RIBOGREENO.
The IC50 of each oligonucleotide was calculated in the same manner as illustrated in Example 3 and the results are presented below.
Table 8 Inhibitory effect of uniform 2'-MOE modified oligonucleotides on human Tau exon 10 expression SEQ ID
SEQ ID NO: SEQ ID
ISIS NO Sequence IC50(nM) NO: 1 Start 1 Stop Site NO
Site 617357 TCCTTTGAGCCACACTTG 0.48 121873 121890 147 617358 ATCCTTTGAGCCACACTT 0.34 121874 121891 148 617359 TATCCTTTGAGCCACACT 0.41 121875 121892 149 549583 TTATCCTTTGAGCCACAC 0.27 121876 121893 33 617360 ATTATCCTTTGAGCCACA 0.33 121877 121894 150 617361 TATTATCCTTTGAGCCAC 0.24 121878 121895 151 617362 ATATTATCCTTTGAGCCA 0.27 121879 121896 152 549584 GATATTATCCTTTGAGCC 0.19 121880 121897 34 565989 TGATATTATCCTTTGAGC 0.39 121881 121898 153 UmGmAmAmGmGmUmAmCmUm 617782 4.33 121914 121934 198 CmAmCmAmCmUmGmCmCmGmCm UmAmUmCmUmGmCmAmCmCm 617781 20.25 121820 121837 199 UmUmUmGmGmUmAmGm 415883 TCTTATTAATTATCTGCACC 0.65 121828 121847 200 Example 7: Modified oligonucleotides targeting exon 10 of human Tau A series of modified oligonucleotides were designed to target exon 10 of human Tau. "Start site"
indicates the 5'-most nucleoside to which the modified oligonucleotide is targeted. "Stop site" indicates the 3'-most nucleoside to which the modified oligonucleotide is targeted. Each modified oligonucleotide listed in the tables below is targeted to SEQ ID NO: 1 (GENBANK Accession No NT_010783.15 truncated from nucleotides 9240000 to 9381000).
In the table below, "mC" indicates 5-methylcytosine, subscript "e" indicates 2'-0-methoxyethyl, subscript "f' indicates 2'-deoxyfluoro, subscript "d" indicates 2'-deoxy, subscript "p" indicates a peptide nucleic acid monomer, subscript "s" indicates a phosphorothioate internucleoside linkage, subscript "o"
indicates a phosphodiester internucleoside linkage, "P-" indicates an 0-linker at the 5'-end (PNA Bio, Thousand Oaks, CA), "-N" indicates a 3'-end carboxy amide.
Table 9 Modified oligonucleotides targeting human Tau ISIS S equence SEQ ID NO: SEQ ID NO: SEQ
NO 1 Start Site 1 Stop Site ID NO
AesmCesGesmCesAesmCesTesmCesAesmCesAesmCesmCes AesmCesTesTesmCe inC G T Ae T T G mC T C G
es es es es s es es es es es esm es es mCesAesAesGe GesAesmCesmCesmCesGesmCesmCesTesAesmCesTesTesGes mCesTesmCesGe G AemC mC mC G mC mC T G mC T T G
565987 es s es es es es es es es es es es es es 121770 121787 mCesTesmCesGe mCesmCesTesGesGesAesmCesmCesmCesGesmCesmCesTes GesmCesTesTesGe mCesGesCf sCfsUfsAfsC fsUfsUfsGf sCfsUfsC fsGfsCf sAfs AesGe mCesmCesUfsGfsGfsAfsCfsCfsCfsGfsCfsCfsUfsGfsCfsUfs TesGe 566013 TesGesAfsUfsAfsUfsUfsAfsUfsCfsCfsUfsUfsUfsGfsAfsGes 121881 121898 208 m Ce 566014 TesTesGfsAfsUfsAfsUfsUfsAfsUfsCfsCfsUfsUfsUfsGfsAes 121882 121899 Ge Tes Tes Ufs Gfs Afs Ufs Afs Ufs Ufs Afs Ufs Cfs Cfs Ufs TJfs Ufs Ges Ae mCes Aes Cfs Ufs Ufs Cfs Cfs Ufs Afs Afs Ufs Afs Afs Ufs Ufs Cfs Aes Ae Aes mCes Afs Cfs Cfs Afs Cfs Ufs Ufs Cfs Cfs Ufs Afs Afs Ufs Afs Aes Te Aes mCes Ufs Cfs Afs Cfs Afs Cfs Cfs Afs Cfs Ufs Ufs Cfs Cfs Ufs Aes Ae mCes MCes Cfs Gfs Cfs Cfs Ufs Afs Cfs Ufs Ufs Gfs Cfs Ufs Cfs Gfs MCeS Ae Ges Aes Cfs Cfs Cfs Gfs Cfs Cfs Ufs Afs Cfs Ufs Ufs Gfs Cfs Ufs MCeS Ge Ges Aes Cfs Cfs Cfs Gfs Cfs Cfs Ufs Gfs Cfs Ufs Ufs Gfs Cfs Ufs MCeS Ge Tes Ges Gfs Afs Cfs Cfs Cfs Gfs Cfs Cfs Ufs Gfs Cfs Ufs Ufs Gfs MCeS Te Urns cm, Urns Urns ms Urns Urns ms ms Urns Urns Ams Ums cm, Ums Gms cm, Ams cm, Cm Tics mCds Tds Tics Ads Tds Tics Ads Ads Tics Tds Ads Tics mCds Tds Gks mCds Ads mCks mCk Tics mCes Tes Tics Aes Tes Tics Aes Aes Tics Tes Aes Tics mCes Tes Gks mCes Aes mCks mCk Tics mCes Tes Tko Aes Tes Tko Aes Aes Tko Tes Aes Tko mCes Tes Gko MCeS Aes MCks MCk Tics MCds Tds Tko Ads Tds Tko Ads Ads Tko Tds Ads Tko mcds Tds Gico mcds Ads nicks mCk P-TCTTATTAATTATCTG

Cp Ap Cp Cp-N
G Aeo MCes Geo Tes Teo Ges mCeo Tes Aeo Aes Geo Ges Ges670011 121851 121868 130 Aes Teo mCes mCes Ae mCmCT T T GAeGmCmCAemC
670012 es es e es e es es e es es 121872 121889 146 Aeo mCes Teo Tes Ges Ge Aes Tes mCeo mCes Teo Tes Teo Ges Aeo Ges mCeo mCes Aeo mCes Aeo mCes Tes Te Tes Tes Aeo Tes mCeo mCes Teo Tes Teo Ges Aeo Ges mCeo mCes Aeo mCes Aes mCe Aes Tes Teo Aes Teo mCe, mCeo Tes Teo Tes Geo Aes Geo mCes mCeo Aes mCes Ae Tes Aes Teo Tes Aeo Tes mCeo mCes Teo Tes Teo Ges Aeo Ges mCeo mCes Aes mCe Aes Tes Aeo Tes Teo Ae, Teo mCes mCeo Tes Teo Tes Geo Aes Geo mCes mCes Ae Ges Aes Teo Aes Teo Tes Aeo Tes mCeo mCes Teo Tes Teo Ges Aeo Ges mCes mCe Ges Tes Teo Tes Geo Aes Teo Aes Teo Tes Aeo Tes mCeo mCes Teo Tes Tes Ge Ges Geo Aeo mCeo Ges Tes Tes Ges mCes Tes Aes Aes Geo Aeo Teo mCes mCes Ae mC mC T T TG Ae G mC mC Ae mC
670021 es e Teo Teo Tes Ges Aes Ges es es s es 121872 Aeo mCeo Teo Tes Ges Ge Aes Teo mCeo mCeo Tes Tes Tes Ges Aes Ges mCes mCes Aeo mCeo Aeo mCes Tes Te Tes Teo Aeo Teo mCes mCes Tes Tes Tes Ges Aes Ges mCeo mCeo Aeo mCes Aes mCe Aes Teo Teo Aeo Tes mCes mCes Tes Tes Tes Ges Aes Geo mCeo mCeo Aes mCes Ae Tes Aeo Teo Teo Aes Tes mCes mCes Tes Tes Tes Ges Aeo Geo mCeo mCes Aes mCe Aes Teo Aeo Teo Tes Aes Tes mCes mCes Tes Tes Tes Geo Aeo Geo mCes mCes Ae Ges Aeo Teo Aeo Tes Tes Aes Tes mCes mCes Tes Tes Teo Geo Aeo Ges mCes mCe Ges Teo Teo Teo Ges Aes Tes Aes Tes Tes Aes Tes mCeo mCeo Teo Tes Tes Ge Ges mCes mCeo Aes mCeo Aes mCeo Tes Teo Ges Geo Aes mCeo Tes Geo Ges Ae, mCe Aes Ges mCeo mCes Aeo mCes Aeo mCes Teo Tes Geo Ges Aeo mCes Teo Ges Ges Ae Tes Ges Aeo Ges mCeo mCes Aeo mCes Aeo mCes Teo Tes Geo Ges Aeo mCes Tes Ge Ges mCeo mCeo Aeo mCes Aes mCes Tes Tes Ges Ges Aes mCeo Teo Geo Ges Aes mCe Aes Geo mCeo mCeo Aes mCes Aes mCes Tes Tes Ges Ges Aeo mCeo Teo Ges Ges Ae Tes Geo Aeo Geo mCes mCes Aes mCes Aes mCes Tes Tes Geo Geo Aeo mCes Tes Ge Tes Ges Geo Aes mCeo Ges Teo Tes Geo mCes Teo Aes Aeo Ges Aeo Tes m(-'¨Yes m(-'¨Ye mC mC Ae mC Ae mC T TGG Ae mC
693841 es es o es o es Teo es Geo es o es Teo Ges Geo Aes mCes Ge Aes mCes Geo Tes Geo Tes Teo Tes Geo Aes Teo Aes Teo Tes Aeo Tes m(-'¨Yes m(-'¨Ye Ges Ges Aeo mCes Geo Tes Geo Tes Geo Aes Aeo Ges Geo Tes Aeo mCes Tes mCe Ges Aes Geo mCes mCeo Aes mCeo Aes mCeo Tes Teo Ges Geo Aes mCeo Tes Ges Ge Tes Geo Geo Aeo mCes Ges Tes Tes Ges mCes Tes Aes Aeo Geo Aeo Tes m(-'¨Yes m(-'¨Y
mC mC Aeo mC Aes mC T T Ges Aes mC
693846 es eo o eo s es es es es es s es Teo Geo Geo Aes mCes Ge Aes mCeo Geo Teo Ges Tes Tes Tes Ges Aes Tes Aes Teo Teo Aeo Tes mCes mCe Ges Geo Aeo mCeo Ges Tes Ges Tes Ges Aes Aes Ges Geo Teo Aeo mCes Tes mCe Ges Aeo Geo mCeo mCes Aes mCes Aes mCes Tes Tes Ges Geo Aeo mCeo Tes Ges Ge Example 8: In vivo analysis of oligonucleotides targeting human Tau exon 10 Sprague Dawley rats were separated into groups of 3 rats for the experiment presented in Table 11 and into groups of 2 or 4 rats for the experiment presented in Table 12. Each rat in each group of rats was administered a single 3 mg intrathecal (IT) dose of an oligonucleotide selected from Table 3, 4, or 9. At various time points after injection from 3 hours to 8 weeks, the movement of 7 different parts of the body was evaluated for each rat. The 7 body parts are (1) the rat's tail; (2) the rat's posterior posture; (3) the rat's hind limbs; (4) the rat's hind paws; (5) the rat's forepaws; (6) the rat's anterior posture; and (7) the rat's head. For each of the 7 different body parts, each rat was given a sub-score of 0 if the body part was moving or 1 if the body part was paralyzed. After each of the 7 body parts were evaluated, the sub-scores were summed for each rat and then averaged for each group. For example, if a rat's tail, head, and all other evaluated body parts were moving 3 hours after the 3 mg IT dose, it would get a summed score of 0. If another rat was not moving its tail 3 hours after the 3 mg IT dose but all other evaluated body parts were moving, it would receive a score of 1. Saline treated rats generally receive a score of 0. A score of at the top end of the range would be suggestive of toxicity. Results are presented as the average score for each treatment group in Tables 11 and 12.
Table 11 3 mg IT bolus in vivo study ISIS Score 3 hours after Score 2 weeks Score 8 weeks SEQ ID
No. injection after injection after injection NO.
670020 1.0 2.7 2.7 130 670011 2.3 2.3 2.3 130 617341 3.0 0.0 0.0 130 678329 2.3 0.0 0.0 140 678332 3.0 0.0 1.3 140 617351 7.0 0.0 4.0 140 678330 2.7 2.3 3.0 141 678333 2.7 2.3 2.3 141 617352 7.0 0.0 2.0 141 678331 3.0 0.0 0.0 83 678334 4.3 2.3 2.3 83 549581 7.0 0.0 0.3 83 670012 2.7 0.0 0.0 146 670021 3.0 0.0 1.0 146 549582 4.3 0.0 0.0 146 670013 0.3 2.3 2.3 148 670022 2.0 2.3 3.0 148 617358 3.7 0.0 1.3 148 670014 0.0 0.0 0.0 33 670023 2.0 1.0 0.3 33 549583 2.3 0.0 0.0 33 670015 1.0 2.0 0.7 150 670024 1.0 0.7 0.0 150 617360 5.3 0.0 1.0 150 670025 0.3 5.3 5.3 151 670016 2.3 1.3 1.7 151 617361 3.0 0.0 0.3 151 670017 0.0 1.7 1.3 152 670026 1.0 3.7 3.3 152 617362 4.7 3.7 2.7 152 670018 0.3 0.3 0.3 34 670027 1.0 0.7 0.7 34 549584 5.0 2.7 3.7 34 670028 2.0 0.0 0.0 35 670019 3.0 0.0 0.0 35 549585 4.7 5.3 7.0 35 Table 12 3 mg IT bolus in vivo study ISIS No. No. of rats in treatment group Score 3 hours after injection SEQ ID NO.
549577 4 3.3 79 693840 4 1.8 79 693845 4 0.0 79 549580 4 7.0 82 693841 4 1.8 82 693846 4 2.5 82 617353 4 7.0 142 693844 2 3.5 142 693849 4 5.0 142 549582 4 4.3 146 549586 4 5.0 36 693847 2 1.0 36 549595 4 6.5 45 693843 2 2.0 45 693848 2 7.0 45 Example 9: Inhibitory effect in vivo of a modified oligonucleotide targeting human Tau exon 10 B6.Cg-Mapttml(EGFP)Klt Tg(MAPT)8cPdav/J mice (The Jackson Laboratory) express the 3R
and 4R isoforms of human Tau. The effect of oligonucleotides selected from Table 3, 4, or 8 on shifting of the 4R isoform to 3R isoform was assessed in this mouse model.
Groups of four B6.Cg-Mapttml(EGFP)Klt Tg(MAPT)8cPdav/J mice (3-4 months of age) were administered 500 [tg of oligonucleotide via an intracerebroventricular (ICV) bolus injection. A control group of four mice was similarly treated with PBS. Two weeks after the dose, animals were sacrificed and RNA was extracted from the cerebral cortex, hippocampus, and/or spinal cord.
mRNA expression of the 4R isoform and total human Tau were analyzed by qRT-PCR. The 4R isoform was analyzed using primer probe set hTau 9_10 junction (forward sequence 5'-CACTGAGAACCTGAAGCACC-3', SEQ
ID NO:
219; reverse sequence 5'-GTTGCTAAGATCCAGCTTCTT-3', SEQ ID NO: 220; probe sequence 5'-TTAATTATCTGCACCTTCCCGCCTCC-3', SEQ ID NO: 221) or primer probe set hTau 10_11 junction (forward sequence 5'-AATATCAAACACGTCCCGGGAG-3', SEQ ID NO: 222;
reverse sequence 5'-TGCCTAATGAGCCACACTTG-3', SEQ ID NO: 223; probe sequence 5'-GTCTACAAACCAGTTGACCTGAGC-3', SEQ ID NO: 224). Total Tau was analyzed using primer probe set RT53104 (forward sequence 5'-AAGATTGGGTCCCTGGACAAT-3', SEQ ID NO:
225;
reverse sequence 5' -AGCTTGTGGGTTTCAATCTTTTTATT-3', SEQ ID NO: 226; probe sequence 5'-CACCCACGTCCCTGGCGGA-3', SEQ ID NO: 227). The ratio of 4R isoform to total Tau mRNA
levels was normalized to mouse GAPDH levels, which were analyzed using primer probe set mGapdh_LTS00102 (forward sequence 5'-GGCAAATTCAACGGCACAGT-3', SEQ ID NO: 228;
reverse sequence 5' -GGGTCTCGCTCCTGGAAGAT-3', SEQ ID NO: 229; probe sequence 5'-AAGGCCGAGAATGGGAAGCTTGTCATC-3', SEQ ID NO: 230). The results are presented in Tables 13-15 as the average ratio of 4R isoform to total Tau mRNA normalized to GAPDH levels for each treatment group divided by the average ratio for the PBS group. "ND"
indicates no data.
Inflammation was also assessed by performing RT-PCT to determine the expression levels of AIF1 in the cortex, hippocampus, and/or spinal cord. After normalization of all samples to GADPH, the average AIF1 value for each treatment group was divided by the average AIF1 value for the PBS control group. The results are presented in Tables 13-15.

Table 13 Effect of modified oligonucleotides on Tau exon 10 skipping in transgenic mice ISIS 4R spinal AIF1 spinal SEQ
4R cortex 4R hippo AIF1 cortex AIF1 hippo NO. cord cord ID NO.
415883 0.50 0.46 0.56 1.35 1.27 1.44 549566 0.54 0.54 0.66 1.09 1.13 1.46 549570 0.58 0.60 0.64 1.17 1.16 1.39 549577 0.25 0.30 0.38 2.92 3.27 4.39 549581 0.25 ND ND 1.04 1.07 1.40 549582 0.07 0.10 0.12 0.89 0.95 1.15 549583 0.25 0.26 0.25 0.97 0.94 1.09 617309 0.36 0.36 0.51 1.06 1.06 1.09 Table 14 Effect of modified oligonucleotides on Tau exon 10 skipping in transgenic mice ISIS
SEQ
4R cortex 4R hippo 4R spinal cord AIF1 spinal cord NO.
ID NO.
549582 0.21 0.21 0.23 0.97 549584 0.32 0.28 0.28 1.12 34 549585 0.30 0.27 0.30 1.05 35 565989 0.36 0.32 0.36 1.03 565990 0.50 0.46 0.53 0.97 617341 0.25 0.28 0.28 1.16 617351 0.13 0.18 0.14 1.01 617352 0.09 0.13 0.09 1.06 617354 0.31 ND ND 1.21 617355 0.43 0.50 0.37 1.18 617356 0.30 0.40 0.49 0.98 617357 0.33 0.33 0.27 1.31 617358 0.27 0.27 0.34 1.12 617359 0.32 0.32 0.37 0.95 617360 0.21 0.19 0.29 1.19 617361 0.26 0.21 0.37 1.04 617362 0.26 0.27 0.34 0.90 617364 0.39 0.33 0.43 1.09 Table 15 Effect of modified oligonucleotides on Tau exon 10 skipping in transgenic mice ISIS AIF1 spinal SEQ
4R cortex 4R hippo 4R spinal cord AIF1 cortex NO. cord ID NO.
549582 0.26 0.34 0.29 0.74 1.03 549586 0.25 0.43 0.38 0.97 0.98 549587 0.39 0.47 0.46 0.96 1.17 549595 0.27 0.39 0.39 0.84 0.92 617317 0.62 0.83 0.53 0.88 1.05 617318 0.57 0.69 0.49 0.94 1.06 617323 0.60 0.82 0.49 0.92 1.10 617324 0.72 0.88 0.49 0.70 1.03 617365 0.31 0.42 0.27 0.79 0.87 617367 0.39 0.46 0.35 0.90 1.29 Example 10: Effect in vivo of mixed backbone oligonucleotides on human Tau exon 10 skipping Groups of four B6.Cg-Mapttml(EGFP)Klt Tg(MAPT)8cPdav/J mice (see Example 9) were administered 125 [tg of an oligonucleotide selected from Table 3, 4, or 9 or PBS via ICV bolus injection.
Two weeks after the dose, animals were sacrificed and RNA was extracted from the cerebral cortex and/or hippocampus and analyzed as described in Example 9. The results are presented in Tables 16 and 17 as the average ratio of the 4R isoform to total Tau mRNA normalized to PBS for each treatment group.
Expression of allograft inflammatory factor (AIF1) was tested as a measure of inflammation by performing RT-PCT to determine the expression levels of AIF1 in the cortex and spinal cord. After normalization of all samples to GADPH, the average AIF1 value for each treatment group was divided by the average AIF1 value for the PBS control group. The results are presented in Tables 16 and 17.
Table 16 Effect of modified oligonucleotides on Tau exon 10 skipping in transgenic mice SEQ
ISIS NO. 4R Cortex AIF1 cortex AIF1 spinal cord ID NO.

549582 0.42 1.0 0.9 146 549583 0.71 0.9 1.2 33 617341 0.64 1.0 0.9 130 617361 0.63 1.1 1.1 151 670011 0.78 1.0 1.0 130 670012 0.47 0.9 1.1 146 670013 0.63 1.0 0.9 148 670014 0.90 0.9 1.0 33 670015 0.70 0.9 0.9 150 670018 0.75 1.0 1.0 34 670019 0.58 1.1 1.0 35 670020 0.67 0.9 0.9 130 670023 0.87 1.0 1.0 33 670024 0.60 1.0 1.1 150 670025 0.72 1.1 0.9 151 670027 0.79 1.0 0.9 34 670028 0.66 1.1 1.0 35 678329 0.13 1.0 1.0 140 678330 0.51 0.9 0.9 141 678331 1.12 0.9 1.0 83 678332 0.27 0.9 1.0 140 678333 0.56 0.9 0.9 141 678334 1.10 0.9 1.2 83 Table 17 Effect of modified oligonucleotides on Tau exon 10 skipping in transgenic mice SEQ ID
ISIS No. 4R Cortex AIF1 cortex AIF1 spinal cord NO.
549577 0.56 1.4 1.6 79 549580 0.52 0.9 1.2 82 549582 0.27 0.9 1.0 146 549586 0.90 1.1 1.3 36 549595 0.90 1.0 1.4 45 617353 1.35 1.0 1.3 142 693840 0.80 0.9 1.2 79 693841 0.91 1.1 1.1 82 693842 1.20 1.0 0.8 36 693843 1.31 1.0 1.6 45 693844 2.22 1.1 1.6 142 693845 0.86 1.0 1.4 79 693846 0.84 1.0 1.4 82 693847 0.89 1.0 1.8 36 693848 0.76 0.9 1.9 45 693849 2.08 0.8 1.8 142

Claims (192)

1. A compound comprising a modified oligonucleotide consisting of 8 to 30 linked nucleosides and having a nucleobase sequence comprising a complementary region comprising at least 8 contiguous nucleobases complementary to a target region of equal length of a Tau transcript.

2. The compound of claim 1, wherein the complementary region of the modified oligonucleotide is 100% complementary to the target region.

3. The compound of claim 1 or 2, wherein the complementary region of the nucleobase sequence of the modified oligonucleotide comprises at least 10 contiguous nucleobases.

4. The compound of claim 1 or 2, wherein the complementary region of the nucleobase sequence of the modified oligonucleotide comprises at least 15 contiguous nucleobases.

5. The compound of claim 1 or 2, wherein the complementary region of the nucleobase sequence of the modified oligonucleotide comprises at least 18 contiguous nucleobases.

6. The compound of any of claims 1-5, wherein the nucleobase sequence of the modified oligonucleotide is at least 80% complementary to an equal-length region of the Tau transcript, as measured over the entire length of the oligonucleotide.

7. The compound of any of claims 1-5, wherein the nucleobase sequence of the modified oligonucleotide is at least 90% complementary to an equal-length region of the Tau transcript, as measured over the entire length of the oligonucleotide.

8. The compound of any of claims 1-5, wherein the nucleobase sequence of the modified oligonucleotide is 100% complementary to an equal-length region of the Tau transcript, as measured over the entire length of the oligonucleotide.

9. The compound of any of claims 1-8, wherein the target region is within exon 10 of the Tau transcript.

10. The compound of any of claims 1-8, wherein the target region is within intron 9 of the Tau transcript.

11. The compound of any of claims 1-8, wherein the target region is within intron 10 of the Tau transcript.

12. The compound of any of claims 1-8, wherein the target region comprises a portion of intron 9 and a portion of exon 10.

13. The compound of any of claims 1-8, wherein the target region comprises a portion of exon 10 and a portion of intron 10.

14. The compound of any of claims 1-8, wherein the target region comprises a portion of exon 10 and a portion of the intron at the 5'-end of exon 10.

15. The compound of any of claims 1-8, wherein the target region comprises a portion of exon 10 and a portion of the intron at the 3'-end of exon 10.

16. The compound of any of claims 1-15, wherein the target region is within nucleobase 121708 and nucleobase 122044 of SEQ ID NO.: 1.

17. The compound of any of claims 1-9, wherein the target region is within nucleobase 121796 and nucleobase 122044 of SEQ ID NO.: 1.

18. The compound of any of claims 1-9, wherein the target region is within nucleobase 121796 and nucleobase 121885 of SEQ ID NO.: 1.

19. The compound of any of claims 1-9, wherein the target region is within nucleobase 121873 and nucleobase 121898 of SEQ ID NO.: 1.

20. The compound of any of claims 1-9, wherein the target region is within nucleobase 121869 and nucleobase 121943 of SEQ ID NO.: 1.

21. The compound of any of claims 1-9, wherein the target region is within nucleobase 122020 and nucleobase 122044 of SEQ ID NO.: 1.

22. The compound of any of claims 1-9, wherein the target region is within nucleobase 121881 and nucleobase 121898 of SEQ ID NO.: 1.

23. The compound of any of claims 1-9, wherein the target region is within nucleobase 121880 and nucleobase 121897 of SEQ ID NO.: 1.

24. The compound of any of claims 1-9, wherein the target region is within nucleobase 121879 and nucleobase 121896 of SEQ ID NO.: 1.

25. The compound of any of claims 1-9, wherein the target region is within nucleobase 121878 and nucleobase 121895 of SEQ ID NO.: 1.

26. The compound of any of claims 1-9, wherein the target region is within nucleobase 121877 and nucleobase 121894 of SEQ ID NO.: 1.

27. The compound of any of claims 1-9, wherein the target region is within nucleobase 121876 and nucleobase 121893 of SEQ ID NO.: 1.

28. The compound of any of claims 1-9, wherein the target region is within nucleobase 121875 and nucleobase 121892 of SEQ ID NO.: 1.

29. The compound of any of claims 1-9, wherein the target region is within nucleobase 121874 and nucleobase 121891 of SEQ ID NO.: 1.

30. The compound of any of claims 1-9, wherein the target region is within nucleobase 121873 and nucleobase 121890 of SEQ ID NO.: 1.

31. The compound of any of claims 1-15, wherein the nucleobase sequence of the modified oligonucleotide comprises the nucleobase sequence of any of SEQ ID NOs: 8-200.

32. The compound of any of claims 1-15, wherein the nucleobase sequence of the modified oligonucleotide consists of the nucleobase sequence of any of SEQ ID NOs: 8-200.

33. The compound of any of claims 1-15, wherein the nucleobase sequence of the modified oligonucleotide comprises the nucleobase sequence of any of SEQ ID NOs: 33, 34, 147, 148, 149, 150, 151, 152, or 153.

34. The compound of any of claims 1-15, wherein the nucleobase sequence of the modified oligonucleotide consists of the nucleobase sequence of any of SEQ ID NOs: 33, 34, 147, 148, 149, 150, 151, 152, or 153.

35. The compound of any of claims 1-15, wherein the nucleobase sequence of the modified oligonucleotide comprises the nucleobase sequence of any of SEQ ID NOs: 31, 33, 34, 35, 36, 37, 45, 72, 79, 82, 83, 97, 106, 107, 112, 113, 130, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 157, 158, 160, or 200.

36. The compound of any of claims 1-15, wherein the nucleobase sequence of the modified oligonucleotide consists of the nucleobase sequence of any of SEQ ID NOs: 31, 33, 34, 35, 36, 37, 45, 72, 79, 82, 83, 97, 106, 107, 112, 113, 130, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 157, 158, 160, or 200.

37. The compound of any of claims 1-36, wherein the modified oligonucleotide comprises at least one modified nucleoside.

38. The compound of claim 37, wherein at least one modified nucleoside comprises a modified sugar moiety.

39. The compound of claim 37, wherein at least one modified sugar moiety is a 2'-substituted sugar moiety.

40. The compound of claim 39, wherein the 2'-substitutent of at least one 2'-substituted sugar moiety is selected from among: 2'-0Me, 2'-F, and 2'-MOE.

41. The compound of claim 39, wherein the 2'-substiuent of at least one 2'-substituted sugar moiety is a 2'-MOE.

42. The compound of any of claims 37-38, wherein at least one modified sugar moiety is a bicyclic sugar moiety.

43. The compound of claim 42, wherein at least one bicyclic sugar moiety is LNA or cEt.

44. The compound of any of claims 37-43, wherein at least one sugar moiety is a sugar surrogate.

45. The compound of claim 44, wherein at least one sugar surrogate is a morpholino.

46. The compound of claim 44, wherein at least one sugar surrogate is a modified morpholino.

47. The compound of any of claim 1-46, wherein the modified oligonucleotide comprises at least 5 modified nucleosides, each independently comprising a modified sugar moiety.

48. The compound of claim 47, wherein the modified oligonucleotide comprises at least 10 modified nucleosides, each independently comprising a modified sugar moiety.

49. The compound of claim 47, wherein the modified oligonucleotide comprises at least 15 modified nucleosides, each independently comprising a modified sugar moiety.

50. The compound of claim 47, wherein each nucleoside of the modified oligonucleotide is a modified nucleoside and each independently comprises a modified sugar moiety, wherein the modified sugar moieties of each modified nucleosides are each the same as one another.

51. The compound of claim 47, wherein each nucleoside of the modified oligonucleotide is a modified nucleoside, each independently comprising a modified sugar moiety.

52. The compound of any of claims 1-51, wherein the modified oligonucleotide comprises at least two modified nucleosides comprising modified sugar moieties that are the same as one another.

53. The compound of any of claims 1-52, wherein the modified oligonucleotide comprises at least two modified nucleosides comprising modified sugar moieties that are different from one another.

54. The compound of any of claims 1-53, wherein the modified oligonucleotide comprises a modified region comprising at least 5 contiguous modified nucleosides.

55. The compound of claim 54, wherein the modified oligonucleotide comprises a modified region comprising at least 10 contiguous modified nucleosides.

56. The compound of claim 54, wherein the modified oligonucleotide comprises a modified region comprising at least 15 contiguous modified nucleosides.

57. The compound of claim 54, wherein the modified oligonucleotide comprises a modified region comprising at least 18 contiguous modified nucleosides.

58. The compound of claim 54, wherein the modified oligonucleotide comprises a modified region comprising at least 20 contiguous modified nucleosides.

59. The compound of any of claims 53-58, wherein each modified nucleoside of the modified region has a modified sugar moiety independently selected from among: 2'-F, 2'-OMe, 2'-MOE, cEt, LNA, morpholino, and modified morpholino.

60. The compound of any of claims 54-59, wherein the modified nucleosides of the modified region each comprise the same modification as one another.

61. The compound of claim 60, wherein the modified nucleosides of the modified region each comprise the same 2'-substituted sugar moiety.

62. The compound of claim 61, wherein the 2'-substituted sugar moiety of the modified nucleosides of the region of modified nucleosides is selected from 2'-F, 2'-OMe, and 2'-MOE.

63. The compound of claim 61, wherein the 2'-substituted sugar moiety of the modified nucleosides of the region of modified nucleosides is 2'-MOE.

64. The compound of claim 59, wherein the modified nucleosides of the region of modified nucleosides each comprise the same bicyclic sugar moiety.

65. The compound of claim 64, wherein the bicyclic sugar moiety of the modified nucleosides of the region of modified nucleosides is selected from LNA and cEt.

66. The compound of claim 59, wherein the modified nucleosides of the region of modified nucleosides each comprises a sugar surrogate.

67. The compound of claim 66, wherein the sugar surrogate of the modified nucleosides of the region of modified nucleosides is a morpholino.

68. The compound of claim 66, wherein the sugar surrogate of the modified nucleosides of the region of modified nucleosides is a modified morpholino.

69. The compound of any of claims 1-68, wherein the modified nucleotide comprises no more than 4 contiguous naturally occurring nucleosides.

70. The compound of any of claims 1-68, wherein each nucleoside of the modified oligonucleotide is a modified nucleoside.

71. The compound of claim 70 wherein each modified nucleoside comprises a modified sugar moiety.

72. The compound of claim 71, wherein the modified nucleosides of the modified oligonucleotide comprise the same modification as one another.

73. The compound of claim 72, wherein the modified nucleosides of the modified oligonucleotide each comprise the same 2'-substituted sugar moiety.

74. The compound of claim 73, wherein the 2'-substituted sugar moiety of the modified oligonucleotide is selected from 2'-F, 2'-OMe, and 2'-MOE.

75. The compound of claim 74, wherein the 2'-substituted sugar moiety of the modified oligonucleotide is 2'-MOE.

76. The compound of claim 72, wherein the modified nucleosides of the modified oligonucleotide each comprise the same bicyclic sugar moiety.

77. The compound of claim 76, wherein the bicyclic sugar moiety of the modified oligonucleotide is selected from LNA and cEt.

78. The compound of claim 72, wherein the modified nucleosides of the modified oligonucleotide each comprises a sugar surrogate.

79. The compound of claim 78, wherein the sugar surrogate of the modified oligonucleotide is a morpholino.

80. The compound of claim 78, wherein the sugar surrogate of the modified oligonucleotide is a modified morpholino.

81. The compound of any of claims 1 to 36, wherein the modified oligonucleotide has an A-B2-A- B2-A-B2-A- B2-A-B2-A-B2-A2 motif, wherein each A comprises a bicylic sugar moiety, and wherein each B is selected from a 2'-substituted sugar moiety and an unmodified 2'-deoxy sugar moiety.

82. The compound of claim 81, wherein each A is a cEt sugar moiety.

83. The compound of claim 81, wherein each A is an LNA sugar moiety.

84. The compound of any of claims 81 to 83, wherein each B is an unmodified 2'-deoxy sugar moiety.

85. The compound of any of claims 81 to 83, wherein each B is 2'-MOE sugar moiety.

86. The compound of any of claims 1-85, wherein the modified oligonucleotide comprises at least one modified internucleoside linkage.

87. The compound of claim 86, wherein each internucleoside linkage is a modified internucleoside linkage.

88. The compound of claim 86 or 87, comprising at least one phosphorothioate internucleoside linkage.

89. The compound of any of claims 1-85, wherein each internucleoside linkage is a modified internucleoside linkage and wherein each internucleoside linkage comprises the same modification.

90. The compound of claim 89, wherein each internucleoside linkage is a phosphorothioate internucleoside linkage.

91. The compound of claim 86, wherein the modified oligonucleotide comprises 4 phosphodiester internucleoside linkages.

92. The compound of claim 86, wherein the modified oligonucleotide comprises 5 phosphodiester internucleoside linkages.

93. The compound of claim 86, wherein the modified oligonucleotide comprises 6 phosphodiester internucleoside linkages.

94. The compound of claim 86, wherein the modified oligonucleotide comprises 7 phosphodiester internucleoside linkages.

95. The compound of any of claims 91 to 94, wherein each remaining internucleoside linkage is a phosphodiester internucleoside linkage.

96. The compound of any of claims 1-85, wherein the compound has an N S N S N O N S N O N S N O N S N O N S N O N S N O N S N O N S N S N
internucleoside linkage motif, wherein each N
represents a nucleoside, each S represents a phosphorothioate internucleoside linkage, and each O
represents a phosphodiester internucleoside linkage.

97. The compound of any of claims 1-85, wherein the compound has an N S N O N O N O N S N S N S N S N S N S N S N S N O N O N O N S N S N
internucleoside linkage motif, wherein each N
represents a nucleoside, each S represents a phosphorothioate internucleoside linkage, and each O
represents a phosphodiester internucleoside linkage.

98. The compound of any of claims 1-97 comprising at least one conjugate.

99. The compound of any of claims 1-98 consisting of the modified oligonucleotide.

100. The compound of any of claims 1-99, wherein the compound modulates splicing of the Tau transcript.

101. The compound of any of claims 1-99, wherein the compound decreases expression of the 4R Tau isoform.

102. The compound of any of claims 1-99, wherein the compound decreases expression Tau mRNA
comprising exon 10.

103. The compound of any of claims 1-99, wherein the compound decreases expression Tau protein comprising amino acids encoded from exon 10 mRNA.

104. The compound of any of claims 1-8 or 30-103, having a nucleobase sequence comprising any of the sequences as set forth in SEQ ID NOs. 8-200.

105. The compound of any of claims 1-8 or 30-103, having a nucleobase sequence comprising any of the sequences as set forth in SEQ ID NOs. 33, 34, 147, 148, 149, 150, 151, 152, or 153.

106. The compound of any of claims 1-8 or 30-103, having a nucleobase sequence consisting of any of the sequences as set forth in SEQ ID NOs. 8-200.

107. The compound of any of claims 1-8 or 30-103, having a nucleobase sequence consisting of any of the sequences as set forth in SEQ ID NOs. 33, 34, 147, 148, 149, 150, 151, 152, or 153.

108. A double stranded compound comprising the compound of any of claims 1-107.

109. A compound consisting of ISIS 670011.

110. A compound consisting of ISIS 670012.

111. A compound consisting of ISIS 670013.

112. A compound consisting of ISIS 670014.

113. A compound consisting of ISIS 670015.

114. A compound consisting of ISIS 670016.

115. A compound consisting of ISIS 670017.

116. A compound consisting of ISIS 670018.

117. A compound consisting of ISIS 670019.

118. A compound consisting of ISIS 670020.

119. A compound consisting of ISIS 670021.

120. A compound consisting of ISIS 670022.

121. A compound consisting of ISIS 670023.

122. A compound consisting of ISIS 670024.

123. A compound consisting of ISIS 670025.

124. A compound consisting of ISIS 670026.

125. A compound consisting of ISIS 670027.

126. A compound consisting of ISIS 670028.

127. A compound consisting of ISIS 678329.

128. A compound consisting of ISIS 678330.

129. A compound consisting of ISIS 678331.

130. A compound consisting of ISIS 678332.

131. A compound consisting of ISIS 678333.

132. A compound consisting of ISIS 678334.

133. A compound consisting of ISIS 693840.

134. A compound consisting of ISIS 693841.

135. A compound consisting of ISIS 693842.

136. A compound consisting of ISIS 693843.

137. A compound consisting of ISIS 693844.

138. A compound consisting of ISIS 693845.

139. A compound consisting of ISIS 693846.

140. A compound consisting of ISIS 693847.

141. A compound consisting of ISIS 693848.

142. A compound consisting of ISIS 693849.

143. A compound consisting of ISIS 549577.

144. A compound consisting of ISIS 549580.

145. A compound consisting of ISIS 549581.

146. A compound consisting of ISIS 549582.

147. A compound consisting of ISIS 549583.

148. A compound consisting of ISIS 549584.

149. A compound consisting of ISIS 549585.

150. A compound consisting of ISIS 549586.

151. A compound consisting of ISIS 617341.

152. A compound consisting of ISIS 617351.

153. A compound consisting of ISIS 617352.

154. A compound consisting of ISIS 617353.

155. A compound consisting of ISIS 617358.

156. A compound consisting of ISIS 617360.

157. A compound consisting of ISIS 617361.

158. A compound consisting of ISIS 617362.

159. A method of modulating splicing of a Tau transcript in a cell comprising contacting the cell with a compound according to any of claims 1-158.

160. The method of claim 158, wherein the cell is in vitro.

161. The method of claim 158, wherein the cell is in an animal.

162. A method of modulating the expression of Tau protein in a cell, comprising contacting the cell with a compound according to any of claims 1-158.

163. The method of claim 162, wherein expression of the 4R isoform of Tau protein is decreased.

164. The method of claim 162, wherein expression of the 3R isoform of Tau protein is increased.

165. The method of any of claims 162 to 164, wherein the cell is in vitro.

166. The method of any of claims 162 to 164, wherein the cell is in an animal.

167. A method of reducing or ameliorating one or more symptoms associated with a tau-associated disorder, comprising contacting a cell with a compound according to any of claims 1-158.

168. The method of claim 167, wherein the symptom is seizure.

169. The method of any of claims 167-168, wherein the cell is in an animal.

170. A pharmaceutical composition comprising a compound according to any of claims 1-158 and a pharmaceutically acceptable carrier or diluent.

171. The pharmaceutical composition of claim 170, wherein the pharmaceutically acceptable carrier or diluent is sterile saline.

172. A method comprising administering the pharmaceutical composition of claims 170 or 171 to an animal.

173. The method of claim 172, wherein the administration is by injection.

174. The method of claim 172 or 173, wherein the administration is systemic.

175. The method of claim 172 or 173, wherein the administration is to the CNS.

176. The method of any of claims 172-175, wherein the animal has one or more symptoms associated with one or more tau-associated disorders.

177. The method of claim 176, wherein the administration results in amelioration of one or more symptoms associated with one or more tau-associated disorders.

178. The method of any of claims 172-175, wherein the animal has one or more symptoms associated with Alzheimer's disease.

179. The method of claim 178, wherein the administration results in amelioration of one or more symptoms associated with Alzheimer's disease.

180. The method of any of claims 172-179, wherein the animal is a mouse.

181. The method of any of claims 172-179, wherein the animal is a human.

182. Use of the compound of any of claims 1 to 158 or the composition of claims 170-171 for the preparation of a medicament for use in the treatment of a tau-associated disorder.

183. Use of the compound of any of claims 1 to 158 or the composition of claims 170-171 for the preparation of a medicament for use in the amelioration of one or more symptoms associated a tau-associated disorder.

184. The compound, composition, or method of any of claims 1-183, wherein the nucleobase sequence does not consist of the nucleobase sequence as set forth in SEQ ID NO.: 45, 66, 68, 69, or 200.

185. The compound, composition, or method of any of claims 1-183, wherein the nucleobase sequence does not consist of the nucleobase sequence CCAGCTTCTTATTAATTATC or TAAGATCCAGCTTCTTATTA.

186. The compound, composition, or method of any of embodiments 1-183, wherein the target region is not within nucleobase 121828 and nucleobase 121847 of SEQ ID NO.: 1.

187. The compound, composition, or method of any of embodiments 1-183, wherein the target region is not within nucleobase 121834 and nucleobase 121853 of SEQ ID NO.: 1.

188. The compound, composition, or method of any of embodiments 1-183, wherein the target region is not within nucleobase 121840 and nucleobase 121859 of SEQ ID NO.: 1.

189. The compound, composition, or method of any of embodiments 1-183, wherein the target region is not within nucleobase 121924 and nucleobase 121941 of SEQ ID NO.: 1.

190. The compound, composition, or method of any of embodiments 1-183, wherein the target region is not within nucleobase 121012 and nucleobase 121029 of SEQ ID NO.: 1.

191. The compound, composition, or method of any of embodiments 1-183, wherein the target region is not within nucleobase 121020 and nucleobase 121037 of SEQ ID NO.: 1.

192. The compound, composition, or method of any of embodiments 1-183, wherein the target region is not within nucleobase 121024 and nucleobase 121041 of SEQ ID NO.: 1.