WO2005027974A1 - Anti cancer combinations comprising a cox-2 inhibitor - Google Patents
Anti cancer combinations comprising a cox-2 inhibitor Download PDFInfo
- Publication number
- WO2005027974A1 WO2005027974A1 PCT/GB2004/003749 GB2004003749W WO2005027974A1 WO 2005027974 A1 WO2005027974 A1 WO 2005027974A1 GB 2004003749 W GB2004003749 W GB 2004003749W WO 2005027974 A1 WO2005027974 A1 WO 2005027974A1
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- WIPO (PCT)
- Prior art keywords
- formula
- compound
- inhibitor
- selective cox
- pharmaceutically acceptable
- Prior art date
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K45/00—Medicinal preparations containing active ingredients not provided for in groups A61K31/00 - A61K41/00
- A61K45/06—Mixtures of active ingredients without chemical characterisation, e.g. antiphlogistics and cardiaca
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/33—Heterocyclic compounds
- A61K31/335—Heterocyclic compounds having oxygen as the only ring hetero atom, e.g. fungichromin
- A61K31/35—Heterocyclic compounds having oxygen as the only ring hetero atom, e.g. fungichromin having six-membered rings with one oxygen as the only ring hetero atom
- A61K31/352—Heterocyclic compounds having oxygen as the only ring hetero atom, e.g. fungichromin having six-membered rings with one oxygen as the only ring hetero atom condensed with carbocyclic rings, e.g. methantheline
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/33—Heterocyclic compounds
- A61K31/335—Heterocyclic compounds having oxygen as the only ring hetero atom, e.g. fungichromin
- A61K31/365—Lactones
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P29/00—Non-central analgesic, antipyretic or antiinflammatory agents, e.g. antirheumatic agents; Non-steroidal antiinflammatory drugs [NSAID]
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P35/00—Antineoplastic agents
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P43/00—Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00
Definitions
- the present invention relates to treatment of neoplastic growth.
- the present invention relates to synergistic combinations of the compounds of the class having the formula (I) as defined below, for example compounds of the xanthenone acetic acid class having the formula (II) as defined below, such as 5,6- dimethylxanthenone-4-acetic acid (DMXAA) and specific non-steroidal anti- inflammatory drugs capable of selectively inhibiting cyclo-oxygenase-2 (COX-2), in particular etoricoxib, pareeoxib, celecoxib, valdecoxib, or rofecoxib (also known as Arcoxia TM, Dynastat TM, Celebrex TM, Bextra TM and Vioxx TM, respectively) for the treatment of neoplastic growth.
- DMXAA 5,6- dimethylxanthenone-4-acetic acid
- COX-2 specific non-steroidal anti- inflammatory drugs capable of selectively inhibiting cyclo-oxygenase-2
- COX-2 cyclo-oxygenase-2
- DMXAA 5,6-dimethylxanthenone-4-acetic acid
- DMXAA Phase I clinical trials of DMXAA have recently been completed (New Zealand, Mount Veraon Hospital, Bradford Royal Infirmary and in Auckland, New Zealand organised by Cancer Research UK). Using a dynamic magnetic resonance imaging (MRI) system, it was possible to demonstrate that DMXAA can induce a significant reduction in tumour blood flow at well-tolerated doses. These trials confirmed that DMXAA is one of the first antivascular agents for which activity (damage to blood vessels in tumour tissue and irreversibly inhibit blood supply to the tumour tissue) has been documented in human tumours. These findings are in agreement with pre-clinical studies using tumours or human tumour xenografts which showed that its antivascular activity produced prolonged inhibition of tumour blood flow leading to extensive regions of haemorrhagic necrosis.
- MRI magnetic resonance imaging
- NSAIDs non-steroidal anti-inflammatory drugs
- COXs cyclooxygenases
- COX-1 Two isoenzymes of COX have been identified: COX-1 and COX-2.
- COX-2 can result in effective relief of pain and inflammation, but COX-1 inhibitors can lead to unacceptable gastrointestinal side effects including diarrhea, bloating, heartburn, upset stomach (dyspepsia) and ulcers.
- Salicylate is the major anti-inflammatory metabolite of aspirin, the original NSAID. Aspirin irreversibly acetylates and blocks the enzyme platelet cyclooxygenase. Salicylate is a selective COX-1 inhibitor.
- NSAIDS are reversible inhibitors and selectivity for COX-1 and COX-2 is variable for many of the conventional NSAIDs.
- Simple reversible inhibitors such as ibuprofen and sulindac can inhibit both COX-2 and COX-1 to approximately the same extent.
- COX-2 inhibitors such as etoricoxib, pareeoxib, celecoxib, valdecoxib or rofecoxib (also known as Arcoxia TM, DynastatTM, CelebrexTM, BextraTM and VioxxTM, respectively) are now available.
- VioxxTM is used for signs and symptoms of osteoarthritis, acute pain in adults and painful menstrual cycles.
- the present invention provides a method for modulating neoplastic growth, which comprises administering to a mammal, including a human, in need of treatment an effective amount of a compound of the formula (I):
- one of j and R 5 is H or a phenyl radical, and the other of t and R 5 is H or a phenyl radical which may optionally be substituted, thienyl, furyl, naphthyl, a - alkyl, cycloalkyl, or aralkyl radical;
- R is H or a Ci-C ⁇ alkyl or CrC 6 alkoxy radical;
- R 2 is the radical -(B)-COOH where B is a linear or branched substituted or unsubstituted C ⁇ -C ⁇ alkyl radical, which is saturated or ethylenically unsaturated.
- the present invention provides a method for modulating neoplastic growth, which comprises administering to a mammal, including a human, in need of treatment an effective amount of a compound of formula (I):
- one of F and R 5 is H or a phenyl radical, and the other of R 4 and R 5 is H or a phenyl radical which may optionally be substituted, thienyl, furyl, naphthyl, a alkyl, cycloalkyl, or aralkyl radical;
- R ⁇ is H or a C ⁇ -C 6 alkyl or C ⁇ -C 6 alkoxy radical;
- R 2 is the radical -(B)-COOH where B is a linear or branched substituted or unsubstituted Ci-C ⁇ alkyl radical, which is saturated or ethylenically unsaturated.
- the compound of the formula (I) as defined above is a compound of the formula (II),
- R l5 R 4 , R 5 and B are as defined above for formula (I) in part (b).
- R 1; R 2 and R 3 are each independently selected from the group consisting of H, d-C 6 alkyl, halogen, CF 3 , CN, NO 2 , NH 2 , OH, OR, NHCOR, NHSO 2 R, SR, SO 2 R or NHR, wherein each R is independently d -C 6 alkyl optionally substituted with one or more substituents selected from hydroxy, amino and methoxy;
- the compound of formula (III) is a compound of the formula (IN):
- R 2 is H
- one of Ri and R 3 is selected from the group consisting of -C ⁇ alkyl, halogen, CF 3 , C ⁇ , ⁇ O 2 , NH 2 , OH, OR, NHCOR, NHSO 2 R, SR, SO 2 R or NHR, wherein each R is independently Ci -C 6 alkyl optionally substituted with one or more substituents selected from hydroxy, amino and methoxy, and the other of R ⁇ and R 3 is H.
- the compound of formula (IV) is of the formula (V):
- R, R ls R 2 and R 3 are as defined for formula IV.
- the compound of formula (IV) is 5,6-dimethylxanthenone 4 acetic acid (DMXAA)
- the term "enhance the effectiveness” refers to an amount of a selective COX-2 inhibitor which can increase, promote, upregulate, stimulate, higher or generally enhance the capacity of the compound of formula (I) to act as a therapeutic agent or an anti-tumour agent in a mammal.
- a selective COX-2 inhibitor can enhance the effectiveness of the compound of formula (I) to function as an anti-tumour agent in a mammal.
- the enhancement of the effectiveness of the compound of formula (I) in the mammal as caused by the selective COX-2 inhibitor may lead to a synergistic, cooperative or additive pharmaceutical effect.
- the term "function as an anti-tumour agent” defines a selective COX-2 inhibitor which can increase, promote, upregulate, stimulate, higher or generally enhance the capacity of the compound of formula (I) to act as a therapeutic agent in the treatment of neoplastic growth in a mammal.
- a selective COX-2 inhibitor may enhance the effectiveness of the compound of formula (I) to function as an anti-tumour agent is by increasing the plasma pharmacokinetics of the compound of formula (I) as defined above in the mammal.
- plasma pharmacokinetics defines the capacity of a selective COX-2 inhibitor to affect the plasma (or tissue) concentration of the compound of formula (I) by altering the absorption, distribution, excretion or metabolism. Different methods of determining the plasma concentration of the compound of formula (I) in the mammal in the presence or absence of the selective COX-2 inhibitor will be known to those of skill in the art.
- the present invention provides the use of a selective COX-2 inhibitor compound for the manufacture of a unit dose of a medicament, for simultaneous, separate or sequential administration with a compound of formula (I) as defined above or a pharmaceutically acceptable salt or ester thereof, for the modulation of neoplastic growth, wherein said unit dose comprises said selective-COX-2 inhibitor compound in an amount which enhances the effectiveness of DMXAA to function as an anti-tumour agent in a subject to be treated.
- the present invention provides a combined preparation of a compound of formula (I) as defined above or a pharmaceutically acceptable salt or ester thereof and a selective COX-2 inhibitor compound for simultaneous, separate or sequential use, e.g. for modulation of neoplastic growth, wherein Hie compound of formula (I) or pharmaceutically acceptable salt or ester thereof and the selective COX-2 inhibitor compound are present in a potentiating ratio, and wherein said inhibitor compound is in an amount which enhances the effectiveness of the compound of formula (I) as defined above to function as an anti-tumour agent in a subject to which the combination is administered.
- a pharmaceutical formulation comprising a combination of a compound of formula (I) as defined above or a pharmaceutically acceptable salt or ester thereof and a selective COX-2 inhibitor compound and optionally one or more pharmaceutically acceptable carriers, excipients, diluents or adjuvants wherein a unit dose of said pharmaceutical formulation comprises said selective COX-2 inhibitor compound in an amount which enhances the effectiveness of the compound of formula (I) as defined above to function as an anti-tumour agent in a subject to be treated.
- the invention further provides a process for the preparation of a pharmaceutical formulation which process comprises bringing into association a combination of a compound of formula (I) as defined above or a pharmaceutically acceptable salt or ester thereof and a selective COX-2 inhibitor compound and optionally one or more pharmaceutically acceptable carriers, excipients, diluents or adjuvants therefor in a unit dose in which said COX-2 inhibitor compound is in an amount which enhances the effectiveness of the compound of formula (I) to function as an anti-tumour agent in a subject to be treated.
- kits comprising in combination for simultaneous, separate or sequential use in modulating neoplastic growth, a compound of formula (I) as defined above or a pharmaceutically acceptable salt or ester thereof and a selective COX-2 inhibitor compound, wherein said selective COX-2 inhibitor is provided in a unit dose comprising an amount of said inhibitor which enhances the effectiveness of the compound of formula (I) to function as an anti-tumour agent in a subject to be treated.
- the compound of formula (I) or pharmacuetically acceptable salt or ester thereof may be present in a unit dose.
- said second component is provided in a unit dose comprising the selective COX-2 inhibitor in an amount which is least that required to enhance the effectiveness of the compound of formula (I) e.g. DMXAA, or a pharmaceutically acceptable salt or ester thereof to function as an anti-tumour agent in a subject to be treated.
- the first component may be present in a unit dose.
- the selective cylooxygenase-2 inhibitor may be selected from the group comprising etoricoxib, pareeoxib, celecoxib, valdecoxib and rofecoxib.
- the selective cylooxygenase-2 inhibitor may be rofecoxib (also known as Vioxx TM).
- the selective COX-2 inhibitor may enhance the effectiveness of the compound of formula (I) to treat neoplastic growth by at least 0.5%, 1%, 2.5%, 5%, 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, 100%, 110%, 120%, 130%, 140%, 150%, 200%, 250%, 300%, 350%, 400%, 450%, 500%, 550% or more compared to the effectiveness of the amount of the compound of formula (I) in the absence of a selective COX-2 inhibitor.
- one of the mechanisms by which a selective COX-2 inhibitor may lead to an enhancement in the effectiveness of the compound of formula (I) to function as an anti-tumour agent is by the capacity of the selective COX-2 inhibitor to affect the plasma pharmacokinetics of the compound of formula (I) which may cause an increase in the bioavailability of the compound of formula (I).
- the compound of formula (I) as defined above or pharmaceutically acceptable salt or ester thereof and the selective COX-2 inhibitor compound may be administered simultaneously, separately or sequentially.
- the compound of formula (I) as defined above or pharmaceutically acceptable salt or ester thereof and the selective COX-2 inhibitor compound are administered within 6 hours, e.g. within 4 hours, such as within 2 hours of one another.
- the compound of formula (I) as defined above or pharmaceutically acceptable salt or ester thereof and the selective COX-2 inhibitor compound are administered simultaneously.
- the two compounds may be administered simultaneously by infusion over 0.2 to 6 hours, for example 0.33 to 3 hours.
- the pharmaceutically acceptable salt may, for example, be the sodium salt.
- selective COX-2 inhibitor is used herein to indicate that the inhibitor as described herein has the capacity to specifically reduce, lower, suppress, thwart, inactivate, repress, diminish, block or generally inhibit the. catalytic activity of COX-2 enzymes.
- the selective COX-2 inhibitor has the capacity to inhibit the function of COX-2 in catalysing the rate-limiting step of prostaglandin biosynthesis by at least 0.1%, 0.5%, 1%, 2%, 3%, 4%, 5%, 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, 95%, 99% or 100%.
- the selective COX-2 inhibitor may be a reversible or an irreversible inhibitor. In one embodiment the selective COX-2 inhibitor is a reversible selective COX-2 inhibitor.
- the compound of formula (I) or pharmaceutically acceptable salt or ester thereof and the selective COX-2 inhibitor compound are administered in a potentiating ratio.
- potentiating ratio' is used herein to indicate that the compound of formula (I), as defined above, or pharmaceutically acceptable salt or ester thereof and the selective COX-2 inhibitor compound are present in a ratio such that the anti-tumour activity of the combination is greater than that of either the compound of formula (I) or the selective COX-2 inhibitor compound alone or of the additive activity that would be predicted for the combinations based on the activities of the individual components.
- the individual components act synergistically or co-operatively in combination provided they are present in a potentiating ratio.
- a potentiating ratio for a compound of formula (I), as defined above, or pharmaceutically acceptable salt or ester thereof and the selective COX-2 inhibitor which may be successfully used to treat cancer, is in the range 1:150 to 15:1, for example in the range of 1:125 to 13:1, e.g. in the range of 1:100 to 12:1, e.g. in the range of 1:75 to 10:1, e.g. in the range of 1:50 to 5:1, e.g. in the range of 1 :25 to 1:1, e.g. in the range of 1:15 to 1:1.
- the potentiating ratio is in the range 1 : 10 to 1 : 1 , e.g. approximately 1 :6.
- the compound of formula (I), e.g. DMXAA, may, for example, be administered (e.g. to man) for treatment of cancer in a dose in the range of 600 to 4900 mg/m 2 , e.g. from 1200 to 3500 mg/m 2 , e.g. from 2000 to 3000 mg/m 2 , such as from 2250 to 2750 mg/m 2 .
- mg/60kg refers to the amount of the stated compound per 60kg of body weight of mammal
- mg/m 2 refers to the weight of the stated compound per square metre of surface area of the patient who is treated.
- the body surface area may be calculated using Boyd's Formula of Body Surface Area (Boyd E., The growth of the surface area of the human body, University of Minnesota Press, 1935). It should be noted that calculations with weight alone are less accurate.
- a method for modulating neoplastic growth which comprises administering to a mammal, including a human, in need of treatment an effective amount of a compound of the formula (I) as defined above, or a pharmaceutically acceptable salt or ester thereof and simultaneously, separately or sequentially administering an effective amount of a selective COX-2 inhibitor, wherein said effective amount of said inhibitor is in the range of greater than 5 mg/60kg and up to 1000 mg/60kg, e.g. from 50-1000 mg/60kg, which causes an enhancement in the effectiveness of the compound having the formula (I) to act as an ant- tumour agent in said mammal.
- the amount of a combination of a compound of formula (I) as defined above, for example DMXAA, or a pharmaceutically acceptable salt or ester thereof and the selective COX-2 inhibitor compound required to be effective as an anti-tumour agent will vary depending on the mammal to be treated and will ultimately be determined by the medical practitioner. The factors to be considered include the route of administration and nature of the formulation, the mammal's bodyweight, age and general condition and the nature and severity of the disease to be treated.
- a suitable effective dose of a selective COX-2 inhibitor to be used in combination with DMXAA for administration to man for treatment of cancer may be a dose which is substantially non-toxic to man but which at the same time has the capacity to enhance the effectiveness of the compound of formula (I) to act as an anti-cancer agent.
- the amount of a combination of a combination of formula (I) or a or a pharmaceutically acceptable salt or ester thereof and a selective COX-2 inhibitor required to be effective as an anti-cancer agent will of course vary and is ultimately at the discretion of the medical practitioner. Different factors which may be considered include the route of administration and the nature of the formulation, the mammal's bodyweight, age and general condition and the nature and severity of disease to be treated.
- DMXAA or pharmaceutically acceptable salt or ester thereof and 70 to 200 mg/60kg of inhibitor, e.g. from 2250 to 2750 mg/m 2 of a compound of formula (I) (e.g. DMXAA) or pharmaceutically acceptable salt or ester thereof and 90 to 150 mg/60kg of inhibitor.
- the dose is in the range of 2250 to 2750 mg/m 2 of a compound of formula (I) (e.g. DMXAA) or pharmaceutically acceptable salt or ester thereof and 100 to 150 mg/60kg of inhibitor.
- the dose is in the range 2250 to 2750 mg/m 2 of a compound of formula (I) (e.g. DMXAA) or pharmaceutically acceptable salt or ester thereof and 110 to 140 mg/60kg of inhibitor, for example 120 to 130 mg/60kg of inhibitor.
- the compound of formula (I) or the pharmaceutically acceptable salt or ester thereof and the selective COX-2 inhibitor compound are also referred to herein as the active ingredients.
- compositions may comprise one or both of the active ingredients (that is, the compound of formula (I) or a pharmaceutically acceptable salt or ester thereof and/or the selective COX-2 inhibitor compound) optionally together with one or more pharmaceutically acceptable carriers, diluents, excipients or adjuvants therefor and optionally together with other therapeutic and/or prophylactic ingredients.
- the carriers, diluents, excipients or adjuvants must be acceptable in the sense of being compatible with the other ingredients of the formulation and not deleterious to the recipient thereof.
- a combination of a compound of formula (I) or a pharmaceutically acceptable salt or ester thereof with a selective COX-2 inhibitor compound and optionally one or more pharmaceutically acceptable carriers, excipients, diluents or adjuvants is presented as a pharmaceutical formulation.
- a pharmaceutical formulation comprising a combination of compound of formula (I) or a pharmaceutically acceptable salt or ester thereof and a selective COX-2 inhibitor compound optionally in association with one or more pharmaceutically acceptable carriers, diluents, excipients or adjuvants therefor, wherein the selective COX-2 inhibitor compound is present in an amount which causes an enhancement in the effectiveness of the compound of formula (I) to act as an anti-cancer agent in a subject to which the combination is administered.
- a pharmaceutical formulation may comprise one active ingredient (i.e. the compound of formula (I) or a pharmaceutically acceptable salt or ester thereof) optionally together with one or more pharmaceutically acceptable carriers, diluents, excipients or adjuvants therefor, while another pharmaceutical formulation may comprise the other active ingredient (i.e. the selective COX-2 inhibitor) optionally together with one or more pharmaceutically acceptable carriers, diluents, excipients or adjuvants therefor.
- the active ingredients are present in separate pharmaceutical formulations, the formulations may be administered simultaneously, separately or sequentially such that the selective COX-2 inhibitor which is a component of one of the pharmaceutical formulations is able to enhance the effectiveness of the compound of formula (I), e.g. DMXAA, or a pharmaceutically acceptable salt or ester thereof which is a component of another pharmaceutical formulation.
- a process for the preparation of a pharmaceutical formulation which process comprises bringing into association a combination of a compound of formula (I) e.g. DMXAA, or a pharmaceutically acceptable salt or ester thereof and a selective COX-2 inhibitor compound optionally with one or more pharmaceutically acceptable carriers, diluents, excipients or adjuvants, wherein said selective COX-2 inhibitor compound is present in said pharmaceutical formulation in an amount which causes an enhancement in the effectiveness of compound of formula (I) e.g. DMXAA, to act as an anti-cancer agent in a subject to which the pharmaceutical formulation is administered.
- a compound of formula (I) e.g. DMXAA
- a selective COX-2 inhibitor compound optionally with one or more pharmaceutically acceptable carriers, diluents, excipients or adjuvants
- the pharmaceutical formulations as described herein may be administered while the patient is undergoing other forms of treatment. Accordingly, it is contemplated that the pharmaceutically active ingredients as described herein may be used in conjunction with another pharmaceutically beneficial entity.
- the other entity need not be administered by the same route. That other entity may be a drug such as steroids, corticosteroids, antibiotics, antiviral therapy, immunosuppresants and anti- inflammatories.
- the other entities would not adversely affect the ability of the selective COX-2 to increase the plasma concentration of the compound of formula (I), e.g. DMXAA, as described in this document.
- the pharmaceutical formulations as described herein can be administered by standard routes. These include but are not limited to: oral, rectal, ophthalmic (including intravitreal or intracameral), nasal, topical (including buccal and sublingual), intrauterine, vaginal or parenteral (including subcutaneous, intraperitoneal, intramuscular, intravenous, intradermal, intracranial, intratracheal, and epidural), transdermal, intracranial, intracerebroventricular, intracerebral, intravaginal, or intrauterine. Other routes of administration include transmucosal, transurethral or intraurethral. In some applications it may be desirable for the active ingredient(s) to cross the Blood brain barrier (BBB).
- BBB Blood brain barrier
- Drug delivery systems can be used to administer the pharmaceutical formulations, depending upon the desired route of administration.
- Drug delivery systems are described, for example, by Langer, R. (Science, 249: 1527 - 1533 (1990)).
- administered includes delivery by any route known in the art.
- the pharmaceutical formulations described herein may comprise a suitable pharmaceutical excipient, diluent, adjuvant or carrier selected with regard to the intended route of administration and standard pharmaceutical practice.
- the pharmaceutical formulations described herein may be administered (e.g. orally, topically or directly into the blood stream) in the form of tablets, capsules, ovules, elixirs, solutions or suspensions, which may contain flavouring or colouring agents, for immediate-, delayed-, modified-, sustained-, pulsed- or controlled-release applications.
- the tablets may contain excipients such as microcrystalline cellulose, lactose, sodium citrate, calcium carbonate, dibasic calcium phosphate and glycine, disintegrants such as starch (preferably corn, potato or tapioca starch), sodium starch glycollate, croscarmellose sodium and certain complex silicates, and granulation binders such as polyvinylpyrrolidone, hydroxypropylmethylcellulose (HPMC), hydroxypropylcellulose (HPC), sucrose, gelatin and acacia. Additionally, lubricating agents such as magnesium stearate, stearic acid, glyceryl behenate and talc may be included.
- excipients such as microcrystalline cellulose, lactose, sodium citrate, calcium carbonate, dibasic calcium phosphate and glycine
- disintegrants such as starch (preferably corn, potato or tapioca starch), sodium starch glycollate, croscarmellose sodium and certain complex silicates
- tablets may contain excipients such as lactose, starch, cellulose, milk sugar or high molecular weight polyethylene glycols.
- excipients such as lactose, starch, cellulose, milk sugar or high molecular weight polyethylene glycols.
- the active ingredients may be combined with various sweetening or flavouring agents, with colouring matter or dyes, with emulsifying and/or suspending agents and with diluents such as water, ethanol, propylene glycol and glycerin, and combinations thereof.
- Formulations suitable for parenteral administration include aqueous and non-aqueous sterile injection solutions which may contain anti-oxidants, buffers, bacteriostats and solutes which render the formulation isotonic with the blood of the intended recipient; and aqueous and non-aqueous sterile suspensions which may include suspending agents and thickening agents.
- the formulations may be presented in unit-dose or multi-dose containers, for example, sealed ampules and vials, and may be stored in a freeze-dried (lyophilized) condition requiring only the addition of the sterile liquid carrier, for example, water for injections, immediately prior to use.
- sterile liquid carrier for example, water for injections
- Extemporaneous injection solutions and suspensions may be prepared from sterile tablets of the kind described above.
- the formulations as described in this document may conveniently be presented in unit dosage form and may be prepared by conventional pharmaceutical techniques. Such techniques include the step of bringing into association:
- the formulations may be prepared by uniformly and intimately bringing into association the pharmaceutically active ingredients with liquid carriers or finely divided solid carriers carrier(s), diluent(s), adjuvant(s) or excipient(s) or both, and then, if necessary, shaping the product.
- compositions may be incorporated into biodegradable polymers allowing for sustained release of the active ingredient(s), the polymers being implanted in the vicinity of where drug delivery is desired, for example, at the site of a tumor or implanted so that the formulation is slowly released systemically.
- Biodegradable polymers and their use are described, for example, in detail in Brem et al, 1991 J Neurosurg 74: 441-446.
- Osmotic minipumps may also be used to provide controlled delivery of high concentrations of the active ingredient(s) through cannulae to the site of interest, such as directly into a solid tumour growth.
- Unit dosage formulations may contain a daily dose or unit, daily sub-dose, or an appropriate fraction thereof, of the administered active ingredient. It should be understood that the daily dose or unit, the daily sub-dose or the appropriate fraction thereof would be determined by the medical practitioner. It should be understood that in addition to the ingredients, particularly mentioned above, formulations according to the present invention may include other agents conventional in the art having regard to the type of formulation in question.
- the active ingredients may be administered intravenously using a formulation containing both a compound of formula (I) or pharmaceutically acceptable salt of ester thereof and a selective COX-2 inhibitor, or the active ingredients may be administered intravenously using separate formulations for each active ingredient already known in the art, i.e. one formulation containing a compound of formula (I) or pharmaceutically acceptable salt of ester thereof and the other formulation containing a selective COX-2 inhibitor.
- compositions suitable for oral administration may be presented as unit dose formulations such as boluses, capsules or tablets each containing a predetermined amount of the active ingredient(s).
- a tablet may be made by compression or moulding, optionally with one or more accessory ingredients.
- Compressed tablets may be prepared by compressing in a suitable machine the active compound(s) in a free-flowing form such as a powder or granules optionally mixed with a binder, lubricant, inert diluent, lubricating agent, surface-active agent or dispersing agent.
- Moulded tablets may be made by moulding an inert liquid diluent. Tablets may be optionally coated and, if uncoated, may optionally be scored.
- Capsules may be prepared by filling the active ingredient(s), either alone or in admixture with one or more accessory ingredients, into the capsule shells and then sealing them in the usual manner.
- Cachets are analogous to capsules wherein the active ingredient(s) together with any accessory ingredient(s) are sealed in a rice paper envelope.
- the compound of formula (I) or a pharmaceutically acceptable salt or ester thereof, the selective COX-2 inhibitor, or the combination of compound of formula (I) or a pharmaceutically acceptable salt or ester thereof and a selective COX-2 inhibitor compound may also be formulated as dispersible granules, which may for example be suspended in water before administration, or sprinkled on food.
- the granules may be packaged, e.g. in a sachet.
- Formulations suitable for oral administration wherein the carrier is a liquid may be presented as a solution or a suspension in an aqueous liquid or a non-aqueous liquid, or as an oil-in- water liquid emulsion.
- Active ingredients according to the present invention include the compound of formula (I) and a selective COX-2 inhibitor compound.
- the selective COX-2 inhibitor compound may be selected from a group comprising etoricoxib, pareeoxib, celecoxib, valdecoxib and rofecoxib (also known as Arcoxia TM, Dynastat TM, Celebrex TM, Bextra and Vioxx , respectively).
- the active ingredients may also be formulated as a solution or suspension suitable for administration via a naso-gastric tube.
- compositions suitable for rectal administration may be presented as unit dose suppositories.
- Suitable carriers include cocoa butter and other materials commonly used in the art.
- the suppositories may be conveniently formed by admixture of the active ingredient(s) with softened or melted carrier(s), diluent(s), adjuvant(s) or excipient(s) followed by chilling and shaping in suitable moulds.
- compositions adapted for transdermal administration may be provided as discrete patches intended to remain in intimate contact with the epidermis of the recipient for a prolonged period of time.
- the active ingredient(s) may be delivered from the patch by iontophoresis (Iontophoresis is described in Pharmaceutical Research, 3(6): 318 (1986)).
- Topical administration is described in Pharmaceutical Research, 3(6): 318 (1986).
- compositions adapted for topical a ⁇ ministration may be provided as ointments, creams, suspensions, lotions, powders, solutions, pastes, gels, sprays, aerosols or oils.
- a topical ointment or cream is preferably used.
- the active ingredient(s) may be employed with either a paraffinic or a water-miscible ointment base.
- the active ingredient(s) may be formulated in a cream with an oil-in-water base or a water-in-oil base.
- Pharmaceutical formulations adapted for topical administration to the eye include eye drops.
- the active ingredient(s) can be dissolved or suspended in a suitable carrier, e.g. in an aqueous solvent.
- Pharmaceutical formulations adapted for topical administration in the mouth include lozenges, pastilles and mouthwashes.
- therapeutically active ingredients are administered parenterally
- examples of such administration include one. or more of: intravenously, intra-arterially, intraperitoneally, intrathecally, intraventricularly, intraurethrally, intrasternally, intracranially, intramuscularly or subcutaneously administering the agent; and/or by using infusion techniques.
- the active ingredient(s) may be used in the form of a sterile aqueous solution or in an oleaginous vehicle which may contain other substances, for example, enough salts or glucose to make the solution isotonic with blood.
- aqueous solutions should be suitably buffered (preferably to a pH of from 3 to 9), if necessary.
- suitable parenteral formulations under sterile conditions is readily accomplished by standard pharmaceutical techniques well-known to those skilled in the art.
- Injectable preparations may be adapted for bolus injection or continuous infusion. Such preparations are conveniently presented in unit dose or multi-dose containers which are sealed after introduction of the formulation until required for use.
- the active ingredient(s) may be in powder form which are constituted with a suitable vehicle, such as sterile, pyrogen-free water, before use.
- Transmucosal refers to delivery of a drag into the blood stream such that the drug passes through the mucosal tissue and enters into the blood stream.
- Transurethral or “intraurethral” refers to delivery of a drug into the urethra, such that the drag contacts and passes through the wall of the urethra and enters into the blood stream.
- a pharmaceutical formulation may be designed to pass across the blood brain barrier (BBB).
- BBB blood brain barrier
- a carrier such as a fatty acid, inositol or cholesterol may be selected that is able to penetrate the BBB.
- the carrier may be a substance that enters the brain through a specific transport system in brain endothelial cells, such as insulin-like growth factor I or II.
- the carrier may be coupled to the active agent or may contain/be in admixture with the active agent.
- Liposomes can be used to cross the BBB.
- WO 91/04014 describes a liposome delivery system in which an active agent can be encapsulated/embedded and in which molecules that are normally transported across the BBB (e.g.
- the pharmaceutical formulations can be encapsulated/embedded into a delivery vehicle such as a liposome in order for the therapeutically active ingredient(s) to be able to cross the BBB.
- vasoactive peptides such as bradykinin or other techniques such as osmotic shock
- osmotic shock Reviewed in Begley, (1996) J Pharm Pharmacol 48: 136-46; Neuwelt et al., (1987) Neurosurgery 20:885-95; Kroll et al, (1998) Neurosurgery 43:879-86; Temsamani et al, (2000) Pharm Sci Technol Today 3:155-162
- Carriers, diluents, excipients and adjuvants refers to materials suitable for compound administration and include any such material known in the art such as, for example, any liquid, gel, solvent, liquid diluent, solubilizer, or the like, which is non-toxic and which does not interact with any components of the formulation in a deleterious manner.
- Examples of pharmaceutically acceptable carriers, diluents, excipients and adjuvants include but are not limited to for example, water, salt solutions, alcohol, silicone, waxes, petroleum jelly, vegetable oils, polyethylene glycols, propylene glycol, liposomes, sugars, gelatin, lactose, amylose, magnesium stearate, talc, surfactants, silicic acid, viscous paraffin, perfume.
- the pharmaceutical formulation(s) may, for example, comprise an adjuvant selected from mineral gels (e. g., aluminum hydroxide), surface active substances such as lysolecithin, pluronic polyols, polyanions, peptides, oil emulsions, alum, and MDP.
- mineral gels e. g., aluminum hydroxide
- surface active substances such as lysolecithin, pluronic polyols, polyanions, peptides, oil emulsions, alum, and MDP.
- a pharmaceutical formulation(s) is provided in a first container; a second container comprises diluent consisting of an aqueous solution of 50t glycerin, 0.25t phenol, and an antiseptic (e. g., 0.005-i5 brilliant green).
- diluent consisting of an aqueous solution of 50t glycerin, 0.25t phenol, and an antiseptic (e. g., 0.005-i5 brilliant green).
- DMXAA may be prepared according to the methods described in Rewcastle et al, Journal of Medicinal Chemistry 34(1): 217-22, January 1991, the contents of which are incorporated herein by reference.
- Figure 1 Shows a tumour growth delay curve over time following a course of treatment with DMXAA (25mg/kg, square), Vioxx TM (150 mg/kg, triangle), the combination of DMXAA (25mg/kg) and Vioxx TM (100 mg/kg, inverse triangle), the combination DMXAA (25mg/kg) and VioxxTM (150 mg/kg, diamond), and control (circle). Mean ⁇ SEM of 6 mice per time point.
- mice from the Animal Resource Unit, University of Auckland, were bred and housed under conditions of constant temperature and humidity, with sterile bedding and food, according to institutional ethical guidelines. All mice were aged between 8 and 12 weeks.
- Colon 38 tumour fragments ( ⁇ 1 mm 3 ) were implanted subcutaneously (s.c.) in anaesthetized (sodium pentobarbitone, 90 mg/kg) mice. The experiments were initiated approximately 8 days later when tumours were approximately 60mm 3 in size. Tumour-bearing mice were treated with drugs according to the administration schedule described before, and the tumours measured using calipers, at three day intervals thereafter. Tumour volumes were calculated as 0.52a 2 b, where a and b are the minor and major axes of the tumour, respectively. The arithmetic means were calculated for each time point, counting cured tumours as zero volume. The growth delay was determined as the difference in the number of days required for the control versus treated tumours to increase four times in volume.
- Example 1- Tumour growth Delay
- the results are shown in Figure 1.
- Vioxx TM alone was found to have no significant effect on the growth of colon 38 tumours. None of the mice treated with DMXAA were cured. With the combination group, there was a remarkable improvement in the antitumour response in that at the combination group of DMXAA (25 mg/kg) + Vioxx TM (100 mg/kg) three out of 6 (3/6) were cured, while in the a combination group of DMXAA (25 mg/kg) + VioxxTM (150 mg/kg) four out of 6 (4/6) were cured. The results showed that coadministration of Vioxx TM with DMXAA can lead to significant increases in antitumour activity.
Abstract
Description
Claims
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US20070082937A1 (en) | 2007-04-12 |
GB0321999D0 (en) | 2003-10-22 |
JP2007505869A (en) | 2007-03-15 |
EP1663312A1 (en) | 2006-06-07 |
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