WO2003025119A2 - Compositions comprising immunostimulatory oligonucleotides and uses thereof to enhance fc receptor-mediated immunotherapies - Google Patents
Compositions comprising immunostimulatory oligonucleotides and uses thereof to enhance fc receptor-mediated immunotherapies Download PDFInfo
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- WO2003025119A2 WO2003025119A2 PCT/US2002/024154 US0224154W WO03025119A2 WO 2003025119 A2 WO2003025119 A2 WO 2003025119A2 US 0224154 W US0224154 W US 0224154W WO 03025119 A2 WO03025119 A2 WO 03025119A2
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Classifications
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- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K39/00—Medicinal preparations containing antigens or antibodies
- A61K39/39—Medicinal preparations containing antigens or antibodies characterised by the immunostimulating additives, e.g. chemical adjuvants
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- A61K39/0005—Vertebrate antigens
- A61K39/0011—Cancer antigens
- A61K39/001102—Receptors, cell surface antigens or cell surface determinants
- A61K39/001111—Immunoglobulin superfamily
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- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K39/00—Medicinal preparations containing antigens or antibodies
- A61K39/395—Antibodies; Immunoglobulins; Immune serum, e.g. antilymphocytic serum
- A61K39/39533—Antibodies; Immunoglobulins; Immune serum, e.g. antilymphocytic serum against materials from animals
- A61K39/39541—Antibodies; Immunoglobulins; Immune serum, e.g. antilymphocytic serum against materials from animals against normal tissues, cells
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- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
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- A61P31/04—Antibacterial agents
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- A61P31/12—Antivirals
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- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P35/00—Antineoplastic agents
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P35/00—Antineoplastic agents
- A61P35/02—Antineoplastic agents specific for leukemia
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P37/00—Drugs for immunological or allergic disorders
- A61P37/02—Immunomodulators
- A61P37/04—Immunostimulants
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- A—HUMAN NECESSITIES
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- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
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- A—HUMAN NECESSITIES
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- A61K2039/555—Medicinal preparations containing antigens or antibodies characterised by a specific combination antigen/adjuvant
- A61K2039/55511—Organic adjuvants
- A61K2039/55561—CpG containing adjuvants; Oligonucleotide containing adjuvants
Definitions
- CpG ODN Synthetic oligodeoxynucleotides containing unmethylated CpG motifs
- mAbs monoclonal antibodies
- Fc receptors Fc receptors
- Fc receptors are crucial for the activity of monoclonal antibodies and are capable of initiating a plethora of biological functions.
- immunotherapeutic approaches have mainly concentrated on leukocyte FcR for IgG (Fc ⁇ R). 21 Three classes of Fc ⁇ R are currently recognized: Fc ⁇ RI (CD64); Fc ⁇ RII (CD32); and Fc ⁇ RIII (CD16).
- the human high affinity receptor for IgG, hFc ⁇ RI (CD64), is exclusively expressed on cells of the myeloid lineage including monocytes, macrophages, granulocytes (upon cytokine induction) and dendritic cells (DCs). 31 CD64 is unique among leukocyte FcR because of its cell distribution, structure, and function. CD64 has the capacity to facilitate antigen specific CD4 + T cell responses by antigen-presenting cells, and triggers potent anti-tumor vaccine responses. 3 ,35 Due to these characteristics this receptor is considered an optimal trigger molecule for antibody therapy. 2
- DC Dendritic cells
- MHC major histocompatibility complex
- DCs are professional antigen- presenting cells, with a unique capacity to induce primary immune responses.
- Tissue residing immature DC exhibit high endocytic and phagocytic activities which, upon maturation, are down-regulated in favor of up regulation of antigen presentation.
- 25 DC- mediated antigen presentation initiates specific immune responses involving both CD4 + and CD8 + T cell activation.
- exogenous antigens are presented on MHC class II molecules and endogenous antigens via the MHC class I pathway.
- cross presentation by DC of exogenous antigens on class I molecules can represent a potent pathway to elicit primary CD8 + T cell responses. 26 ' 3
- cross presentation is an inefficient process as fluid phase internalization of antigens only results in class I- restricted presentation at high concentrations. 28 ' 5
- Fc ⁇ R-mediated uptake of complexed antigens can markedly enhance the efficiency of cross presentation.
- the present invention provides compositions and methods for enhancing FcR-mediated immunotherapies.
- immunostimulatory CpG-containing oligonucleotides CpG ODN
- Fc ⁇ RI CD64
- the compositions and methods of the present invention include FcR-directed compounds in combination with immunostimulatory oligonucleotides.
- immunostimulatory oligonucleotides can be used to enhance antibody dependent cellular cytotoxicity (ADCC) induced by FcR-targeted antibodies, including bispecific antibodies.
- ADCC antibody dependent cellular cytotoxicity
- the invention provides a composition comprising one or more immunostimulatory oligonucleotides in combination with a monoclonal antibody or FcR-targeted bispecific or multispecific antibody directed against a target cell or pathogen.
- Typical target cells against which ADCC is induced include, but are not limited to, tumor cells such as cells from ovarian, breast, testicular and prostate tumors, as well as leukemia and lymphoma.
- Typical target pathogens include, for example, viruses and bacteria.
- the bispecific and multispecific antibodies used in the invention bind to a target cell or pathogen, and to an Fc receptor (e.g., a human Fc receptor), such that they induce FcR-mediated ADCC of the target cell or pathogen by an effector cell, e.g., a monocyte, macrophage or an activated polymorphonuclear cell.
- Fc receptors for targeting include Fc-gamma receptors (Fc ⁇ Rs), particularly Fc ⁇ RI (CD64), but also Fc ⁇ RII (CD32), and Fc ⁇ RIII (CD 16).
- Fc ⁇ Rs Fc-gamma receptors
- IgA receptors e.g. Fc ⁇ RI
- Fc ⁇ RI IgA receptors
- the bispecific or multispecific antibody binds to an Fc receptor at a site which is distinct from the natural ligand binding site of the receptor (i.e., the immunoglobulin Fc (e.g., IgG or IgA) binding site of the receptor). Therefore, the binding of the bispecific or multispecific antibody is not blocked by physiological levels of immunoglobulins.
- the immunoglobulin Fc e.g., IgG or IgA
- the bispecific and multispecific antibodies of the invention include two or more antibodies or antibody fragments (e.g., an Fab, Fab', F(ab')2, Fv, or a single chain Fv), linked together either chemically or genetically.
- Preferred antibodies include folly human monoclonal antibodies, as well as “chimeric” and “humanized” antibodies.
- Murine monoclonal antibodies also can be used.
- the invention provides a method of enhancing FcR-mediated ADCC or killing (e.g., lysing or phagocytosis) of a target cell, such as a cancer cell, in a subject by administering to the subject a composition comprising one or more immunostimulatory oligonucleotides and a bispecific antibody directed against the target cell and an Fc receptor, such as CD64.
- the method can be used to treat a variety of diseases, particularly cancers, by inhibiting or preventing the growth of target (e.g., tumor) cells.
- immunostimulatory oligonucleotides can be used to enhance Fc receptor-mediated antigen presentation.
- immunostimulatory oligonucleotides can increase dendritic cell (DC)-mediated cross presentation (MHC Class I presentation) of CD64- targeted antigens.
- DC dendritic cell
- MHC Class I presentation MHC Class I presentation
- the invention provides a vaccine composition comprising one or more immunostimulatory oligonucleotides in combination with an FcR-targeted antigen.
- Suitable antigens include any antigen against which an increased immune response is desired (e.g., any antigen which can be used as a vaccine).
- Typical antigens include tumor, viral and bacterial antigens.
- the FcR-targeted antigen is targeted to an FcR by way of linking the antigen to a moiety that binds to an FcR on an antigen presenting cell (APC), such that the antigen is targeted to the cell.
- the moiety that binds to the FcR is typically an antibody or antibody fragment that binds to FcR.
- the FcR-targeted antigen can be a fusion protein or molecular conjugate containing the antigen linked (e.g., chemically or genetically) to an antibody or antibody fragment which binds to an FcR.
- the FcR-targeted antigen comprises a single chain fusion protein comprising the antigen linked to a single chain antibody directed against an FcR, such as CD64.
- the invention provides a method of enhancing Fc receptor-mediated (e.g., CD64-mediated) antigen presentation, such as dendritic cell (DC)-mediated cross presentation (MHC Class I presentation) of CD64- targeted antigens, in a subject by administering to the subject one or more immunostimulatory oligonucleotides in combination with an FcR-targeted antigen.
- Fc receptor-mediated e.g., CD64-mediated
- DC dendritic cell
- MHC Class I presentation multi-mediated cross presentation
- CD64-directed tumor vaccines can be augmented and antigen-specific antibody responses can be induced.
- diseases can be treated and/or prevented including, but not limited to, cancers, autoimmune diseases, and pathogenic (e.g., viral and bacterial) infections.
- compositions of the present invention can be formulated in a pharmaceutically acceptable carrier and administered to a subject using any suitable route of administration. Typically the compositions are administered by injection, in an appropriate amount and dosage regimen to achieve a therapeutic effect.
- the immunostimulatory oligonucleotide(s) can be formulated together with the FcR-targeted molecule (e.g., antigen or tumor-directed bispecific antibody) in a single composition such that they are coadministered, or alternatively, the immunostimulatory oligonucleotide(s) and the FcR-targeted molecule can be formulated separately as two distinct compositions. In this instance, the separate compositions can be administered together (concurrently) or can be administered separately (sequentially).
- compositions of the present invention also can be co- administered with other therapeutic and cytotoxic agents.
- chemotherapeutic agents such as doxorubicin (adriamycin), cisplatin bleomycin sulfate, carmustine, chlorambucil, and cyclophosphamide hydroxyurea.
- the compositions of the invention also can be administered in conjunction with radiation therapy.
- the compositions of the invention also can be administered in conjunction with an agent that modulates, e.g., enhances or inhibits, the expression or activity of an Fc receptor, e.g., an Fc ⁇ receptor or an Fc ⁇ receptor, such as a cytokine.
- Typical cytokines for administration during treatment include granulocyte colony-stimulating factor (G-CSF), granulocyte- macrophage colony-stimulating factor (GM-CSF), interferon- ⁇ (IFN- ⁇ ), and tumor necrosis factor (TNF).
- Typical therapeutic agents include, among others, anti-neoplastic agents such as doxorubicin (adriamycin), cisplatin bleomycin sulfate, carmustine, chlorambucil, and cyclophosphamide hydroxyurea.
- Figure 1 is a graph showing the enhanced effect of CpG ODN on murine
- mice IgG2a-induced immunotherapy against a B cell lymphoma.
- Groups of 6 C3H/HeN mice were inoculated i.p. with 38C13 T3C tumor cells on day 0. Consequently, mice were treated once daily (on days 5, 7, and 10) with 100 ⁇ g mAb (IgGl or IgG2a) alone, 20 ⁇ g CpG ODN 1826, or a combination. Treatment schedule is shown on the right. Survival was recorded daily. Similar results were obtained in three independent experiments.
- FIGS 2 A and B are graphs showing the effect of CpG ODN on PMN hFc ⁇ Rl (CD64) expression levels.
- hFc ⁇ RI- Tg and NTg mice were treated with single doses of 5, 7.5, or 10 ⁇ g CpG ODN 1826 s.c. and mice treated with saline (0.9% NaCl) served as controls.
- hFc ⁇ RI expression levels on PMN were determined by FACS analysis of whole blood.
- PMN expression levels of hFc ⁇ RI of Tg mice, Tg mice treated with 7.5 ⁇ g CpG ODN 1826, and NTg mice are shown in panel A.
- hFc ⁇ RJ expression levels of Tg mice treated with different CpG ODN concentrations are shown in panel B.
- Figure 3 is a graph showing the kinetics of CpG ODN on hFc ⁇ RI expression.
- hFc ⁇ Rl-Tg andNtg mice were injected with a single s.c. dose of 7.5 ⁇ g CpG ODN 1826, and Tg mice treated with saline served as controls.
- hFc ⁇ RI expression levels were determined on five consecutive days by FACS analysis of whole blood.
- hFc ⁇ RI expression levels at the indicated time points are shown.
- Level of irrelevant murine IgG was identical to the level of the NTg mice in Fig. 1A. Similar results were obtained in three independent experiments.
- FIGS 4 A-F are graphs showing the in vivo effect of CpG ODN on leukocytes.
- hFc ⁇ RI-Tg and NTg mice were treated with 7.5 ⁇ g of CpG ODN 1826 and mice treated with saline served as controls.
- Whole blood was analyzed by FACS using lineage-specific markers (see Material and Methods). Data shown in the different panels represent percentages of cells at five consecutive time-points for granulocytes (A), monocytes ( B), DC (C), T cells (D), and B cells (E).
- FIG. 5 is a graph showing the effect of CpG ODN on hFc ⁇ Rl-mediated ADCC.
- SK-Br-3 cells labeled with 51 Cr were incubated with different concentrations of BsAb MDX-H210 and 10 ⁇ g/ml CpG ODN 1826 or 1982.
- mice were treated with G-CSF for three days prior to the start of the experiment to increase granulocyte numbers. All determinations were performed in triplicate and similar results were obtained in three independent experiments.
- Figure 6 is a graph showing the enhanced effect of CpG ODN on hFc ⁇ RI-directed solid tumor immunotherapy.
- Groups of 6 hFc ⁇ Rl-Tg and NTg mice received 7.5 ⁇ g CpG ODN 1826 s.c. on day -1.
- CMS7HE tumor cells were inoculated s.c. in the right flank. Consequently, they were treated twice daily i.p. (on days 1-5, and 9-13) with 10 ⁇ g MDX-H210 or 100 ⁇ l PBS.
- the second dose of CpG ODN 1826 was administered. Treatment schedule is shown on the right. Tumor volumes were measured three times a week and animals were scored for toxocity. Similar results were obtained in three independent experiments.
- Figures 7 A-C are graphs showing the effect of culture conditions on DC7 cell surface marker expression.
- Murine CD64-Tg and NTg DC were cultured for 7 days either in the presence of GM-CSF (A), or with GM-CSF/TNF- ⁇ (B).
- DC7 were cultured for 2 additional days in the presence of LPS (L) to study DC maturation (C).
- LPS LPS
- C DC maturation
- Expression of specific markers was analyzed by flow cytometry. Controls are depicted as open histograms and monoclonal antibodies (mAb) as filled histograms in A and B. In C, controls are depicted as closed histograms, and mAb as gray lines (no LPS) or black lines (with LPS).
- mAb monoclonal antibodies
- Figure 8 is a graph showing the MHC class II antigen-presenting capacity of DC.
- Human CD64-Tg DC cultured for 7 or 9 days in the presence of either GM-CSF or GM-CSF/TNF- ⁇ , were incubated with excess OVA (400 ⁇ g/ml), or with OVA-IgG ⁇ ONA complexes (100 ng/ml), and ONA-specific MHC class II-restricted DO 11.10 T cells for 24 h at 37°C.
- Levels of IL-2 production by T cells were determined by CTLL-2 proliferation assays. Data represent means of duplicate determinations in one representative experiment out-of-four.
- Figure 9 shows the effect of CpG ODN on DC cell surface marker expression.
- Human CD64-Tg DC were cultured for 7 days in the presence of GM-CSF or GM-CSF/TNF- ⁇ . Subsequently, CpG ODN (100 ⁇ g/ml) were added for 24 h. Cell surface expression of different markers was analyzed by flow cytometry. Data shown are representative of three independent experiments, yielding identical results.
- Figure 10 shows the effect of CpG ODN on MHC class I presentation.
- Human CD64-Tg DC were cultured for 7 days in the presence of either GM-CSF or GM-CSF/TNF- ⁇ . These DC were incubated with either 124 ⁇ g/ml SIINFEKL (A), or with different concentrations of OVA-IgG ⁇ OVA immune complexes (B), in the presence or absence of CpG ODN for 24 h at 37°C. Cells were fixed, washed and incubated with MHC class I-restricted OVA-specific RF33 T cells for 24 h at 37°C. IL- 2 released by T cells was determined by CTLL-2 proliferation assays. One representative experiment out-of-four is shown.
- Figure 11 shows the effect of CpG ODN on human CD64-mediated cross presentation.
- Human CD64-Tg and NTg DC were cultured for 7 days in the presence of either GM-CSF (A, B), or GM-CSF/TNF- ⁇ (C, D), and were then incubated with 22- OVA (genetically engineered) (A, C) or 22*OVA (chemically cross-linked) (B, D), either with or without CpG ODN, for 24 h at 37°C.
- Cells were fixed, washed and incubated with MHC class I-restricted OVA-specific RF33 T cells for 24 h at 37°C.
- IL-2 released by T cells was determined by CTLL-2 proliferation assays. One representative experiments out-of-three is shown.
- the present invention uses immunostimulatory CpG-containing oligonucleotides (CpG ODN) to augment FcR-mediated immune responses, particularly Fc ⁇ RI (CD64)-mediated immune responses.
- CpG ODN immunostimulatory CpG-containing oligonucleotides
- Fc ⁇ RI CD64
- the therapeutic effect of the agent is enhanced.
- immunostimulatory CpG-containing oligonucleotides increase CD64 expression and stimulate effector cells, including phagocyte proliferation.
- immunostimulatory oligonucleotide refers to an oligonucleotide which contains a cytosine, guanine nucleotide sequence, which is capable of increasing an FcR-mediated immune response including but not limited to FcR-mediated ADCC, particularly Fc ⁇ RI-mediated ADCC, and FcR-mediated antigen presentation, particularly Fc ⁇ RI-mediated antigen presentation.
- Preferred immunostimulatory oligonucleotides are between 2 and 100 base pairs in size, more preferably between 10 and 50 base pairs, and most preferably between 15-25 base pairs (e.g., about 20 base pairs) in length.
- Immunostimulatory oligonucleotides for use in the present invention can be prepared as described in U.S. Patent No. 6,194,388, the entire contents of which is hereby incorporated by reference herein.
- immunostimulatory oligonucleotides contain a consensus mitogenic CpG motif represented by the formula: 5 X 1 X 2 CGX 3 X 4 3 wherein C and G are unmethylated, X], X 2 , X 3 , and X ⁇ are nucleotides and a GCG trinucleotide sequence is not present at or near the 5' and 3' termini.
- bispecific molecule is intended to include any agent, e.g., a protein, peptide, or protein or peptide complex, which has two different binding specificities.
- the molecule may bind to, or interact with, (a) a cell surface antigen, such as a tumor antigen, and (b) an Fc receptor on the surface of an effector cell, e.g., FcR ⁇ RI (CD64).
- Typical bispecific molecules include "bispecific antibodies” which are composed of two antibodies or antibody fragments having different binding specificities linked together.
- multispecific molecule or “heterospecific molecule” is intended to include any agent, e.g., a protein, peptide, or protein or peptide complex, which has two or more different binding specificities. Accordingly,
- multispecific molecules include bispecific molecules, as well as molecules which have more than two binding specificities.
- the molecule may bind to, or interact with, (a) a cell surface antigen, (b) an Fc receptor on the surface of an effector cell, and (c) at least one other component.
- the invention includes, but is not limited to, bispecific, trispecific, tetraspecific, and other multispecific molecules which are directed to cell surface antigens and to other targets, such as Fc receptors on effector cells.
- Diabodies also include diabodies.
- Diabodies are bivalent, bispecific antibodies in which the NH and NL domains are expressed on a single polypeptide chain, but using a linker that is too short to allow for pairing between the two domains on the same chain, thereby forcing the domains to pair with complementary domains of another chain and creating two antigen binding sites (see e.g., Holliger, P., et al. (1993) Proc. Natl. Acad. Sci. USA 90:6444-6448; Poljak, R.J., et al. (1994) Structure 2:1121-1123).
- multispecific molecules for use in the present invention are directed against Fc receptors (e.g., have one or more binding specificities for an Fc receptor), preferably Fc gamma receptors, such as CD64.
- Fc gamma-directed bispecific molecules and bispecific antibodies can be generated as described in US Patent No. 5,635,600, the entire contents of which is hereby incorporated by reference herein.
- Bispecific molecules directed against Fc alpha receptor (CD89) for use in the present invention can be prepared as described in US Patent No. 6,193,966, the entire contents of which is hereby incorporated by reference herein.
- Other bispecific molecules which can be used in the present invention are described in US Patent No. 5,837,243, the entire contents of which is hereby incorporated by reference herein.
- the binding specificity for an Fc receptor is provided by a human monoclonal antibody against Fc ⁇ RI, the binding of which is not blocked by human immunoglobulin G (IgG).
- IgG human immunoglobulin G
- the production and characterization of these preferred monoclonal antibodies are described by Fanger et al. in PCT application WO 88/00052 and in U.S. Patent No. 4,954,617, the teachings of which are folly incorporated by reference herein.
- These antibodies bind to an epitope of Fc ⁇ RI, Fc ⁇ RII or Fc ⁇ RIII at a site which is distinct from the Fc ⁇ binding site of the receptor and, thus, their binding is not blocked substantially by physiological levels of IgG.
- Anti-Fc ⁇ RI antibodies useful in this invention are mAb 22, mAb 32, mAb 44, mAb 62 and mAb 197.
- the hybridoma producing mAb 32 is available from the American Type Culture Collection, ATCC Accession No. HB9469.
- the anti-Fc ⁇ receptor antibody is a humanized form of monoclonal antibody 22 (H22). The production and characterization of the H22 antibody is described in Graziano, R.F. et al. (1995) J.
- the binding specificity for an Fc receptor is provided by an antibody that binds to a human IgA receptor, e.g., an Fc-alpha receptor (Fc ⁇ RI (CD89)), the binding of which is preferably not blocked by human immunoglobulin A (IgA).
- a human IgA receptor e.g., an Fc-alpha receptor (Fc ⁇ RI (CD89)
- Fc ⁇ RI Fc ⁇ RI
- IgA human immunoglobulin A
- Fc ⁇ RI-specific monoclonal antibodies identified as A3, A59, A62 and A77, which bind Fc ⁇ RI outside the IgA ligand binding domain, have been described (Monteiro, R.C. et al, 1992, J. Immunol. 148:1764).
- Fc ⁇ RI and Fc ⁇ RI are preferred trigger receptors for use in the present invention because they are (1) expressed primarily on immune effector cells, e.g., monocytes, PMNs, macrophages and dendritic cells; (2) expressed at high levels (e.g., 5,000-100,000 per cell); (3) mediators of cytotoxic activities (e.g., ADCC, phagocytosis); (4) mediate enhanced antigen presentation of antigens, including self- antigens, targeted to them.
- immune effector cells e.g., monocytes, PMNs, macrophages and dendritic cells
- mediators of cytotoxic activities e.g., ADCC, phagocytosis
- antibody includes whole antibodies and any antigen binding fragment (i.e., "antigen-binding portion") or single chain thereof.
- An "antigen-binding fragment” of an antibody refers to one or more fragments of an antibody that retains the ability to specifically bind to an antigen. It has been shown that the antigen-binding function of an antibody can be performed by fragments of a full-length antibody.
- binding fragments encompassed within the term "antigen-binding portion" of an antibody include (i) a Fab fragment, a monovalent fragment consisting of the NL, NH, CL and CHI domains; (ii) a F(ab')2 fragment, a bivalent fragment comprising two Fab fragments linked by a disulfide bridge at the hinge region; (iii) a Fd fragment consisting of the VH and CHI domains; (iv) a Fv fragment consisting of the NL and VH domains of a single arm of an antibody, (v) a dAb fragment (Ward et al, (1989) Nature 341 :544-546), which consists of a NH domain; and (vi) an isolated complementarity determining region (CDR).
- a Fab fragment a monovalent fragment consisting of the NL, NH, CL and CHI domains
- F(ab')2 fragment a bivalent fragment comprising two Fab fragments linked by a dis
- the two domains of the Fv fragment, NL and NH are coded for by separate genes, they can be joined, using recombinant methods, by a synthetic linker that enables them to be made as a single protein chain in which the NL and NH regions pair to form monovalent molecules (known as single chain Fv (scFv); see e.g., Birdet al. (1988) Science 242:423-426; and Huston et al. (1988) Proc. Natl. Acad. Sci. USA 85:5879- 5883).
- single chain Fv single chain Fv
- Such single chain antibodies are also intended to be encompassed within the term "antigen-binding portion" of an antibody.
- the terms “monoclonal antibody” and “monoclonal antibody composition” as used herein refer to a preparation of antibody molecules of single molecular composition.
- a monoclonal antibody composition displays a single binding specificity and affinity for a particular epitope.
- the term “human monoclonal antibody” refers to antibodies displaying a single binding specificity which have variable and constant regions derived from human germline immunoglobulin sequences.
- the human monoclonal antibodies are produced by a hybridoma which includes a B cell obtained from a transgenic non-human animal, e.g., a transgenic mouse, having a genome comprising a human heavy chain transgene and a light chain transgene fused to an immortalized cell.
- Human antibodies can be generated as described in U.S. Patent ⁇ os. 5,545,806; 5,569,825; 5,625,126; 5,633,425; 5,789,650; 5,877,397; 5,661,016; 5,814,318; 5,874,299; and 5,770,429; all to Lonberg and Kay, and GenPharm International; U.S. Patent No. 5,545,807 to Surani et al. ; International Publication Nos.
- FcR-mediated immune responses and FcR-mediated antigen presentation are used interchangeably herein, and include any level of increase in an immune response (e.g., ADCC, cellular lysis, phagocytosis, antibody production and opsonization, cytokine production etc.) or in antigen presentation when an FcR-directed therapeutic of the present invention is administered in conjunction with immunostimulatory oligonucleotides as compared to when it is administered in the absence of immunostimulatory oligonucleotides.
- the term “inhibits growth” is intended to include any measurable decrease in the growth of a cell as compared to a control cell, e.g., the inhibition of growth of a cell by at least about 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, 99%, or 100%.
- the terms “inhibits binding” and “blocks binding” are used interchangeably and encompass both partial and complete inhibition/blocking, e.g., by at least about 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, 99%, or 100%.
- nucleic acid molecule is intended to include DNA molecules and RNA molecules.
- a nucleic acid molecule may be single-stranded or double-stranded, but preferably is double-stranded DNA.
- immunostimulatory oligonucleotides are short nucleic acid molecules.
- nucleic acids For nucleic acids, the term "substantial homology" indicates that two nucleic acids, or designated sequences thereof, when optimally aligned and compared, are identical, with appropriate nucleotide insertions or deletions, in at least about 80% of the nucleotides, usually at least about 90% to 95%, and more preferably at least about 98% to 99.5% of the nucleotides. Alternatively, substantial homology exists when the segments will hybridize under selective hybridization conditions, to the complement of the strand.
- the comparison of sequences and determination of percent identity between two sequences can be accomplished using a mathematical algorithm, as described in the non-limiting examples below.
- the percent identity between two nucleotide sequences can be determined using the GAP program in the GCG software package (available at http://www.gcg.com), using a NWSga ⁇ dna.CMP matrix and a gap weight of 40, 50, 60, 70, or 80 and a length weight of 1, 2, 3, 4, 5, or 6.
- the percent identity between two nucleotide or amino acid sequences can also determined using the algorithm of E. Meyers and W. Miller (Comput. Appl. Biosci., 4:11-17 (1988)) which has been incorporated into the ALIGN program (version 2.0), using a PAM120 weight residue table, a gap length penalty of 12 and a gap penalty of 4.
- the percent identity between two amino acid sequences can be determined using the Needleman and Wunsch (J. Mol. Biol.
- effector cell refers to an immune cell which is involved in the effector phase of an immune response, as opposed to the cognitive and activation phases of an immune response.
- exemplary immune cells include a cell of a myeloid or lymphoid origin, e.g., lymphocytes (e.g., B cells and T cells including cytolytic T cells (CTLs)), killer cells, natural killer cells, macrophages, monocytes, eosinophils, neutrophils, polymorphonuclear cells, granulocytes, mast cells, and basophils.
- lymphocytes e.g., B cells and T cells including cytolytic T cells (CTLs)
- killer cells e.g., natural killer cells, macrophages, monocytes, eosinophils, neutrophils, polymorphonuclear cells, granulocytes, mast cells, and basophils.
- an effector cell is capable of inducing antibody-dependent cell-mediated cytotoxicity (ADCC), e.g., a neutrophil capable of inducing ADCC.
- ADCC antibody-dependent cell-mediated cytotoxicity
- monocytes, macrophages, which express FcR are involved in specific killing of target cells and presenting antigens to other components of the immune system, or binding to cells that present antigens.
- an effector cell can phagocytose a target antigen, target cell, or microorganism.
- the expression of a particular FcR on an effector cell can be regulated by humoral factors such as cytokines.
- Fc ⁇ RI has been found to be up-regulated by interferon gamma (IFN- ⁇ ).
- an effector cell can phagocytose or lyse a target antigen or a target cell.
- target cell refers to any undesirable cell in a subject (e.g., a human or animal) that can be targeted by a composition (e.g., a human monoclonal antibody, a bispecific or a multispecific molecule) of the invention.
- the target cell is a cell expressing or overexpressing a tumor antigen, such as bladder, breast, colon, kidney, ovarian, prostate, renal cell, squamous cell, lung (non-small cell), and head and neck tumor cells.
- Other target cells include synovial fibroblast cells.
- antibodies While human monoclonal antibodies are preferred, other antibodies ⁇ which can be employed in the bispecific or multispecific molecules of the invention are murine, chimeric and humanized monoclonal antibodies.
- Chimeric mouse-human monoclonal antibodies can be produced by recombinant DNA techniques known in the art. For example, a gene encoding the Fc constant region of a murine (or other species) monoclonal antibody molecule is digested with restriction enzymes to remove the region encoding the murine Fc, and the equivalent portion of a gene encoding a human Fc constant region is substituted, (see Robinson et al., International Patent Publication PCT/US 86/02269; Akira, et al., European Patent Application 184,187; Taniguchi, M., European Patent Application 171,496; Morrison et al., European Patent Application 173,494; Neuberger et al., International Application WO 86/01533; Cabilly et al.
- the chimeric antibody can be further humanized by replacing sequences of the Fv variable region which are not directly involved in antigen binding with equivalent sequences from human Fv variable regions.
- General reviews of humanized chimeric antibodies are provided by Morrison, S. L., 1985, Science 229:1202-1207 and by Oi et al, 1986, BioTechniques 4:214. Those methods include isolating, manipulating, and expressing the nucleic acid sequences that encode all or part of immunoglobulin Fv variable regions from at least one of a heavy or light chain. Sources of such nucleic acid are well known to those skilled in the art and, for example, may be obtained from 7E3, an anti-GPIIbIII a antibody producing hybridoma. The recombinant
- DNA encoding the chimeric antibody, or fragment thereof, can then be cloned into an appropriate expression vector.
- Suitable humanized antibodies can alternatively be produced by CDR substitution U.S. Patent 5,225,539; Jones et al. 1986 Nature 321:552- 525; Nerhoeyan et al. 1988 Science 239:1534; and Beidler et al. 1988 J. Immunol. 141:4053-4060.
- All of the CDRs of a particular human antibody may be replaced with at least a portion of a non-human CDR or only some of the CDRs may be replaced with non-human CDRs. It is only necessary to replace the number of CDRs required for binding of the humanized antibody to the Fc receptor.
- An antibody can be humanized by any method, which is capable of replacing at least a portion of a CDR of a human antibody with a CDR derived from a non-human antibody.
- Winter describes a method which may be used to prepare the humanized antibodies of the present invention (UK Patent Application GB 2188638A, filed on March 26, 1987), the contents of which is expressly incorporated by reference.
- the human CDRs may be replaced with non-human CDRs using oligonucleotide site- directed mutagenesis as described in International Application WO 94/10332 entitled, Humanized Antibodies to Fc Receptors for Immunoglobulin G on Human Mononuclear Phagocytes.
- chimeric and humanized antibodies in which specific amino acids have been substituted, deleted or added.
- preferred humanized antibodies have amino acid substitutions in the framework region, such as to improve binding to the antigen.
- amino acids located in the human framework region can be replaced with the amino acids located at the corresponding positions in the mouse antibody. Such substitutions are known to improve binding of humanized antibodies to the antigen in some instances.
- Antibodies in which amino acids have been added, deleted, or substituted are referred to herein as modified antibodies or altered antibodies.
- modified antibody is also intended to include antibodies, such as monoclonal antibodies, chimeric antibodies, and humanized antibodies which have been modified by, e.g., deleting, adding, or substituting portions of the antibody.
- an antibody can be modified by deleting the constant region and replacing it with a constant region meant to increase half-life, e.g., serum half-life, stability or affinity of the antibody. Any modification is within the scope of the invention so long as the bispecific and multispecific molecule has at least one antigen binding region specific for an Fc ⁇ R and triggers at least one effector function.
- Bispecific and multispecific molecules of the present invention can be made using chemical techniques (see e.g., D. M. Kranz et al. (1981) Proc. Natl. Acad. Sci. USA 78:5807), "polydoma” techniques (See U.S. Patent 4,474,893, to Reading), or recombinant DNA techniques.
- bispecific and multispecific molecules of the present invention can be prepared by conjugating the constituent binding specificities, e.g., the anti-FcR and anti-HER-2/neu binding specificities, using methods known in the art and described in the examples provided herein. For example, each binding specificity of the bispecific and multispecific molecule can be generated separately and then conjugated to one another.
- cross-linking agents include protein A, carbodiimide, N-succinimidyl-S-acetyl- thioacetate (SATA), 5,5'-dithiobis(2-nitrobenzoic acid) (DTNB), o- phenylenedimaleimide (oPDM), N-succinimidyl-3-(2-pyridyldithio)propionate (SPDP), and sulfosuccinimidyl 4-(N-maleimidomethyl) cyclohaxane-1-carboxylate (sulfo- SMCC) (see e.g., Karpovsky et al.
- the binding specificities are antibodies (e.g., two humanized antibodies), they can be conjugated via sulfhydryl bonding of the C-terminus hinge regions of the two heavy chains.
- the hinge region is modified to contain an odd number of sulfhydryl residues, preferably one, prior to conjugation.
- both binding specificities can be encoded in the same vector and expressed and assembled in the same host cell. This method is particularly useful where the bispecific and multispecific molecule is a mAb x mAb, mAb x Fab, Fab x F(ab')2 or ligand x Fab fusion protein.
- a bispecific and multispecific molecule of the invention e.g., a bispecific molecule can be a single chain molecule, such as a single chain bispecific antibody, a single chain bispecific molecule comprising one single chain antibody and a binding determinant, or a single chain bispecific molecule comprising two binding determinants.
- Bispecific and multispecific molecules can also be single chain molecules or may comprise at least two single chain molecules. Methods for preparing bi- and multspecific molecules are described for example in U.S. Patent Number 5,260,203; U.S. Patent Number 5,455,030; U.S. Patent Number 4,881,175; U.S. Patent Number 5,132,405; U.S. Patent Number 5,091,513; U.S.
- pharmaceutically acceptable carrier includes any and all solvents, dispersion media, coatings, antibacterial and antifongal agents, isotonic and abso ⁇ tion delaying agents, and the like that are physiologically compatible.
- the carrier is suitable for intravenous, intramuscular, subcutaneous, parenteral, spinal or epidermal administration (e.g., by injection or infusion).
- the active compound i.e., antibody, bispecific and multispecific molecule, may be coated in a material to protect the compound from the action of acids and other natural conditions that may inactivate the compound.
- compositions of the present invention can be administered by a variety of methods known in the art. As will be appreciated by the skilled artisan, the route and/or mode of administration will vary depending upon the desired results.
- the active compounds can be prepared with carriers that will protect the compound against rapid release, such as a controlled release formulation, including implants, transdermal patches, and microencapsulated delivery systems.
- Biodegradable, biocompatible polymers can be used, such as ethylene vinyl acetate, polyanhydrides, polyglycolic acid, collagen, polyorthoesters, and polylactic acid. Many methods for the preparation of such formulations are patented or generally known to those skilled in the art. See, e.g., Sustainedand Controlled Release Drug Delivery Systems, J.R. Robinson, ed., Marcel Dekker, Inc., New York, 1978.
- the compound may be administered to a subject in an appropriate carrier, for example, liposomes, virosomes, or a diluent.
- suitable diluents include saline and aqueous buffer solutions.
- Liposomes include water-in-oil-in-water CGF emulsions as well as conventional liposomes (Strejan et al. (1984) J Neuroimmunol. 7:27).
- Pharmaceutically acceptable carriers include sterile aqueous solutions or dispersions and sterile powders for the extemporaneous preparation of sterile injectable solutions or dispersion.
- sterile aqueous solutions or dispersions and sterile powders for the extemporaneous preparation of sterile injectable solutions or dispersion.
- the use of such media and agents for pharmaceutically active substances is known in the art. Except insofar as any conventional media or agent is incompatible with the active compound, use thereof in the pharmaceutical compositions of the invention is contemplated. Supplementary active compounds can also be incorporated into the compositions.
- compositions typically must be sterile and stable under the conditions of manufacture and storage.
- the composition can be formulated as a solution, microemulsion, liposome, or other ordered structure suitable to high drug concentration.
- the carrier can be a solvent or dispersion medium containing, for example, water, ethanol, polyol (for example, glycerol, propylene glycol, and liquid polyethylene glycol, and the like), and suitable mixtures thereof.
- the proper fluidity can be maintained, for example, by the use of a coating such as lecithin, by the maintenance of the required particle size in the case of dispersion and by the use of surfactants.
- isotonic agents for example, sugars, polyalcohols such as mannitol, sorbitol, or sodium chloride in the composition.
- Prolonged absorption of the injectable compositions can be brought about by including in the composition an agent that delays absorption, for example, monostearate salts and gelatin.
- Sterile injectable solutions can be prepared by incorporating the active compound in the required amount in an appropriate solvent with one or a combination of ingredients enumerated above, as required, followed by sterilization microfiltration.
- dispersions are prepared by incorporating the active compound into a sterile vehicle that contains a basic dispersion medium and the required other ingredients from those enumerated above.
- the preferred methods of preparation are vacuum drying and freeze- drying (lyopliilization) that yield a powder of the active ingredient plus any additional desired ingredient from a previously sterile-filtered solution thereof.
- Dosage regimens are adjusted to provide the optimum desired response (e.g., a therapeutic response). For example, a single bolus may be administered, several divided doses may be administered over time or the dose may be proportionally reduced or increased as indicated by the exigencies of the therapeutic situation. It is especially advantageous to formulate parenteral compositions in dosage unit form for ease of administration and uniformity of dosage.
- Dosage unit form as used herein refers to physically discrete units suited as unitary dosages for the subjects to be treated; each unit contains a predetermined quantity of active compound calculated to produce the desired therapeutic effect in association with the required pharmaceutical carrier.
- antioxidants include: (1) water soluble antioxidants, such as ascorbic acid, cysteine hydrochloride, sodium bisulfate, sodium metabisulf ⁇ te, sodium sulfite and the like; (2) oil-soluble antioxidants, such as ascorbyl palmitate, butylated hydroxyanisole (BHA), butylated hydroxytoluene (BHT), lecithin, propyl gallate, alpha-tocopherol, and the like; and (3) metal chelating agents, such as citric acid, ethylenediamine tetraacetic acid (EDTA), sorbitol, tartaric acid, phosphoric acid, and the like.
- water soluble antioxidants such as ascorbic acid, cysteine hydrochloride, sodium bisulfate, sodium metabisulf ⁇ te, sodium sulfite and the like
- oil-soluble antioxidants such as ascorbyl palmitate, butylated hydroxyanisole (BHA), butylated hydroxytoluene (B
- formulations of the present invention include those suitable for oral, nasal, topical (including buccal and sublingual), rectal, vaginal and/or parenteral administration.
- the formulations may conveniently be presented in unit dosage form and may be prepared by any methods known in the art of pharmacy.
- the amount of active ingredient which can be combined with a carrier material to produce a single dosage form will vary depending upon the subject being treated, and the particular mode of administration.
- the amount of active ingredient which can be combined with a carrier material to produce a single dosage form will generally be that amount of the composition which produces a therapeutic effect. Generally, out of one hundred per cent, this amount will range from about 0.01 per cent to about ninety-nine percent of active ingredient, preferably from about 0.1 per cent to about 70 per cent, most preferably from about 1 per cent to about 30 per cent.
- parenteral administration and “administered parenterally” as used herein means modes of administration other than enteral and topical administration, usually by injection, and includes, without limitation, intravenous, intramuscular, intraarterial, intrathecal, intracapsular, intraorbital, intracardiac, intradermal, intraperitoneal, transtracheal, subcutaneous, subcuticular, intraarticular, subcapsular, subarachnoid, intraspinal, epidural and intrasternal injection and infusion.
- aqueous and nonaqueous carriers examples include water, ethanol, polyols (such as glycerol, propylene glycol, polyethylene glycol, and the like), and suitable mixtures thereof, vegetable oils, such as olive oil, and injectable organic esters, such as ethyl oleate.
- polyols such as glycerol, propylene glycol, polyethylene glycol, and the like
- vegetable oils such as olive oil
- injectable organic esters such as ethyl oleate.
- Proper fluidity can be maintained, for example, by the use of coating materials, such as lecithin, by the maintenance of the required particle size in the case of dispersions, and by the use of surfactants.
- These compositions may also contain adjuvants such as preservatives, wetting agents, emulsifying agents and dispersing agents.
- Prevention of presence of microorganisms may be ensured both by sterilization procedures, supra, and by the inclusion of various antibacterial and antifungal agents, for example, paraben, chlorobutanol, phenol sorbic acid, and the like. It may also be desirable to include isotonic agents, such as sugars, sodium chloride, and the like into the compositions. In addition, prolonged absorption of the injectable pharmaceutical form may be brought about by the inclusion of agents which delay absorption such as aluminum monostearate and gelatin.
- the compounds of the present invention When the compounds of the present invention are administered as pharmaceuticals, to humans and animals, they can be given alone or as a pharmaceutical composition containing, for example, 0.01 to 99.5% (more preferably, 0.1 to 90%) of active ingredient in combination with a pharmaceutically acceptable carrier. Regardless of the route of administration selected, the compounds of the present invention, which may be used in a suitable hydrated form, and/or the pharmaceutical compositions of the present invention, are formulated into pharmaceutically acceptable dosage forms by conventional methods known to those of skill in the art.
- Actual dosage levels of the active ingredients in the pharmaceutical compositions of the present invention may be varied so as to obtain an amount of the active ingredient which is effective to achieve the desired therapeutic response for a particular patient, composition, and mode of administration, without being toxic to the patient.
- the selected dosage level will depend upon a variety of pharmacokinetic factors including the activity of the particular compositions of the present invention employed, or the ester, salt or amide thereof, the route of administration, the time of administration, the rate of excretion of the particular compound being employed, the duration of the treatment, other drugs, compounds and/or materials used in combination with the particular compositions employed, the age, sex, weight, condition, general health and prior medical history of the patient being treated, and like factors well known in the medical arts.
- a physician or veterinarian having ordinary skill in the art can readily determine and prescribe the effective amount of the pharmaceutical composition required.
- the physician or veterinarian could start doses of the compounds of the invention employed in the pharmaceutical composition at levels lower than that required in order to achieve the desired therapeutic effect and gradually increase the dosage until the desired effect is achieved.
- a suitable daily dose of a compositions of the invention will be that amount of the compound which is the lowest dose effective to produce a therapeutic effect.
- Such an effective dose will generally depend upon the factors described above. It is preferred that administration be intravenous, intramuscular, intraperitoneal, or subcutaneous, preferably administered proximal to the site of the target.
- the effective daily dose of a therapeutic compositions may be administered as two, three, four, five, six or more sub-doses administered separately at appropriate intervals throughout the day, optionally, in unit dosage forms. While it is possible for a compound of the present invention to be administered alone, it is preferable to administer the compound as a pharmaceutical formulation (composition).
- compositions can be administered with medical devices known in the art.
- a therapeutic composition of the invention can be administered with a needleless hypodermic injection device, such as the devices disclosed in U.S. Patent Nos. 5,399,163; 5,383,851; 5,312,335; 5,064,413; 4,941,880; 4,790,824; or 4,596,556.
- a needleless hypodermic injection device such as the devices disclosed in U.S. Patent Nos. 5,399,163; 5,383,851; 5,312,335; 5,064,413; 4,941,880; 4,790,824; or 4,596,556.
- Examples of well-known implants and modules useful in the present invention include: U.S. Patent No. 4,487,603, which discloses an implantable micro-infosion pump for dispensing medication at a controlled rate; U.S. Patent No. 4,486,194, which discloses a therapeutic device for administering medicants through the skin; U.S. Patent No.
- mice transgenic for hFc ⁇ RI were crossed back into Balb/C. 30 F12 littermates and C3H/HeN mice were used for these studies. In all experiments with hFc ⁇ RI-Tg animals, the Tg mice were matched with their non-transgenic (NTg) littermates.
- Female CH3/HeN mice were obtained from Harlan-Sprague-Dawley (Indianapolis, IN). Mice were bred and maintained either in the Transgenic Mouse Facility of the Centtal Laboratory Animal Facility (Utrecht, The Netherlands) or in the Animal Care Unit at the University of Iowa (Iowa City, IA) and were used at 8-16 weeks of age. All experiments were approved by the Utrecht, or University of Iowa animal ethics committees.
- SK-BR-3 a breast carcinoma cell line over-expressing HER-2/neu
- a TCC American Type Culture Collection
- MA Manassas, NA, HTB- 30
- 31 Cells were cultured in medium consisting of RPMI 1640 medium (Gibco BRL, Life Technologies, Paisley, Scotland), supplemented with 10% heat-inactivated fetal bovine serum (FBS) (Hyclone, Logan, UT), 50 ⁇ g/ml streptomycin, 50 IU/ml penicillin, and 4 mM L-glutamine (all Gibco BRL), hereby called complete medium.
- FBS heat-inactivated fetal bovine serum
- the 3- methylcholantrene-induced murine fibrosarcoma cell line, CMS7HE, stably transfected with human HER-2/neu, together with a control cell line, transfected with an empty vector, CMS7neo, were provided by Dr. Hiroshi Shiku (Mie University School of Medicine, Mie, Japan). 32 ' 33 These cells were maintained in complete medium, supplemented with 462 ⁇ g/ml Geneticin (G418 sulphate; Gibco BRL).
- Antibodies A panel of anti-mouse mAb, unlabeled or labeled with either fluorescein isothiocyanate (FITC)-, R-phycoerythrin (RPE), or biotin, was used to detect the different murine effector cell populations.
- FITC fluorescein isothiocyanate
- RPE R-phycoerythrin
- biotin biotin
- CD3-FITC (clone 17-2a; rat IgG2b ⁇ ), CD4- RPE (rat IgG2b ⁇ ), CD8a-FITC (rat IgG2a ⁇ ), CD25-RPE (rat IgGl), GDI lc-biotin- labeled (clone HL3; hamster IgGl), CDllb- FITC (rat IgG2b), CD45R-FITC (clone B220; rat IgG2a), murine Fc ⁇ RII/III-RPE (clone 2.4G2; rat IgG2b), GR-I-RPE (clone RB6-8C5; rat IgG2b), Streptavedine-RPE, CD80 (clone 16-10A1; hamster IgG2), and CD86 (clone GL1; rat IgG2) were all purchased from PharMingen (BD Biosciences, BD PharMingen,
- F4/80-FITC (clone Cl: A3-1; rat IgG2b), was obtained from Serotec (Oxford, UK). Monoclonal antibodies M5/114, anti-mouse MHC II was provided by Dr. Georg Kraal (Nrije Universiteit, Amsterdam, the Netherlands), and 4D 11 (clone mLGl-1 ; rat IgG2a) was produced the hybridoma in our own laboratory.
- FITC-conjugated mouse anti-human Fc ⁇ RI CD64; mAb 22; murine IgGl
- mAb 32.2 murine IgGl
- unconjugated murine mAb against HER-2/neu 520C9; murine IgGl
- Medarex Medarex Inc., Annandale, NJ
- mAbs primary mAb were used, including: F(ab')2 goat-anti-mouse IgG (H+L) (Protos Immunoresearch, San Francisco CA), F(ab')2 donkey-anti-rat IgG (H+L)-FITC, and F(ab')2 goat-anti-human IgG-FITC (Jackson ImmunoResearch, West Grace, PA), c-neu (Ab5; clone TA-1; murine IgGl) was used to assess HER-2/neu expression levels on tumor cell lines (Oncogene, Cambridge, England).
- Murine IgGl and IgG2a anti-idiotype mAb (clone MS5A10 and MSI 1G6) have been described previously and were purified from cell culture supernatant by affinity chromatography using protein A. 38 " 39 BsAb MDX-H210 (hFc ⁇ RI x HER-2/neu) was produced by chemically cross-linking F(ab') fragments of the target antibodies H22 (hFc ⁇ RI), and 520C9 (HER-2/neu) (Medarex). 40
- CpG ODN were provided by Coley Pharmaceutical Group (Wellesley, MA).
- CpG ODN 1826 (sequence TCCATGACGTTCCTGACGTT), was used as the immunostimulatory CpG ODN and CpG ODN 1982 (sequence TCCAGGACTTCTCTCAGGTT), in which the CpG motifs were mutated, served as its control.
- CpG ODN were tested and proved to contain ⁇ 12.5 ng/mg of lipopoly saccharides levels by Limulus assays (LAL-assay BioWhittaker, Walkersville, MD). 5
- Flow cytometry Whole murine blood, isolated human or murine white blood cells, or murine tumor cells were incubated for 30 minutes with either labeled or unlabeled mAb. Subsequently, cells were washed thrice in PBS supplemented with 1 % bovine serum albumin (BSA) and 0.01 % azide. When unlabeled primary mAb were used, counter- l o staining was performed with FITC- or RPE- 1 abeled F(ab')2 fragments of a goat anti- mouse antibody. Whole blood samples were lysed and fixed by using FACS® lysing solution (Becton Dickinson, San Jose, CA). All samples were analyzed on a FA CSCalibur flow cytometer (Becton Dickinson).
- Cytotoxicity assay Tumor cells were plated in 6 well plates at a concentration of 5 x 10 3 cells/well and CpG ODN were added at different concentrations (2.8, 5, 7.5, 10, and 20 ⁇ g/ml). Plates were incubated at 37°C in a humidified incubator and cells were inspected daily by microscopy for proliferation and morphology. At day four, cells were detached with trypsin-EDTA and tested for viability and HER-2/neu expression by
- a Chromium-51 ( 51 Cr) release assay slightly modified from Nalerius et al, was used. 24 Briefly, tumor cells were incubated with 200 ⁇ Ci 51 Cr (Amersham, Buckinghamshire, UK) for two hours. After washing thrice with culture medium, 5 x 10 3 target cell were added to round-bottomed microtiter plates containing sensitizing mAb / BsAb, CpG OD ⁇ , and 50 ⁇ l of whole blood. Murine whole blood was used as
- mice were treated for three days with 150 ⁇ g of murine granulocyte colony-stimulating factor (G-CSF) subcutaneous (s.c.) (Amgen, Thousand Oaks, CA), to increase circulating numbers of leukocytes prior to blood collection via orbital puncture.
- G-CSF murine granulocyte colony-stimulating factor
- the effector to target cell ratio was approximately 80:1 in a final volume of 200 ⁇ l.
- assays were stopped by centrifugation. 51 Cr-release was measured in supernatants from triplicate wells. Percentage of cellular cytotoxicity was calculated using the formula: Experimental, cpm - basal cpm
- Tumor models In the 38C13 murine B cell lymphoma model, 5 x 10 38C13 T3C tumor cells, which grow rapidly and consistently in immunocompetent C3H/HeN mice, were injected intraperitoneally (i.p.) and CpG ODN and mAb were injected according to the study protocol.
- a s.c. solid tumor documented in detail elsewhere , was established by inoculating 2 x 10 CMS7HE cells s.c. in the right flank of male F12 Tg- hFc ⁇ Rl and NTg mice. These tumors grew uniform and could easily be measured using calipers. Tumor volume was reported as length x width x height (mm 3 ). BsAb were injected twice-daily i.p.
- Tumor cells were tested for stable HER-2/neu expression after in vivo passage by FACS analyses. Mice were checked three times a week for signs of toxicity and discomfort, including level of activity, ruffled fur, diarrhea, and general appearance.
- hFcyRI Tg FVB/N mice constitatively express hFcyRI on monocytes, macrophages, immature dendritic cells (DC), and in low numbers on polymorphonuclear cells (PMN). 30 Expression of hFcyRI on PMN can be upregulated in vivo upon stimulation with IFN-y or G-CSp 41 ' 42 F12 mice showed identical expression patterns and hFcyRI regulation.
- hFcyRI expression levels were upregulated by CpG ODN in a dose-dependent manner (Fig. 2B).
- the kinetics of hFcyRI expression after a single s.c. dose of CpG ODN 1826 was assessed.
- a clear time-response curve was observed, with upregulation of hFcyRI expression for up to 5 days after a single dose of CpG ODN 1826 (Fig. 3).
- Example 3 Immunostimulatory Effects of CpG ODN on Phagocytic Cells
- hFc ⁇ RI Tg and NTg mice were injected with a single dose of CpG ODN 1826 at day 0.
- 100 ⁇ l of whole blood were obtained and PMN, monocyte, DC, T cell, and B cell populations were analyzed by flow cytometry.
- a clear increase was observed in the percentage of PMN at day 1, which then returned to baseline by day 3.
- Monocytes showed a comparable pattern, with maximal cell numbers reached at day 3.
- both Tg and NTg mice showed an increase, although to a different extent. There was no change in B cell and T cells numbers (Fig. 4A-E).
- activation markers MHC II, B7-1, B7-2 were also studied, and murine FcyRII/III. FcyRII/III expression assessed in the Tg animals showed a slight increase (in MFI) on day 3 (Fig. 4F). No changes were observed in any of the other activation markers.
- MDX-H210 is a bispecific antibody (BsAb) directed against hFcyRI (CD64) and the tumor antigen, HER2/neu. It was investigated whether MDX-H210- mediated ADCC by G-CSF stimulated murine PMN was affected by CpG ODN 1826. Transgenic PMN exhibited enhanced tumor cell killing via MDX-H210 following addition of CpG ODN 1826. Furthermore, the combination of MDX-H210 and CpG ODN 1826 was effective at very low BsAb concentrations (Fig. 5). No enhanced specific lysis was observed with a control CpG ODN 1982 in combination with MDX- H210. NTg PMN were unable to mediate lysis except via mAb 520C9, an anti-HER- 2/neu murine IgGl mAb that initiates cytotoxicity via murine FcyRII/III. 43
- mice bearing a murine fibrosarcoma were treated with a combination of MDX-H210 and CpG ODN 1826.
- a clear reduction in the growth of tumors was observed in Tg mice treated with the combination of MDX- H210 and CpG ODN 1826, whereas in all other treatment groups (and in NTg mice) tumors grew progressively (Fig. 6).
- Experiments performed with inactive CpG ODN 1982 did not show any therapeutic effects.
- Examples 1-5 show that CpG ODN increase expression of Fc ⁇ RI.
- absolute numbers of PMN, monocytes, and DC were increased with no apparent changes in T- and B cell numbers.
- CpG ODN are known to induce a Thl- instead of a Th2-type response. This results in a cytokine profile which favors hFc ⁇ RI-upregulation.
- Examples 1-5 demonstrate that the CpG ODN compositions of the present invention induce both direct anti-tumor effects and active anti-tumor immune responses. Enhancement of both ADCC and the development of active anti- tumor immune responses was accomplished through the use of CpG ODN in combination with hFc ⁇ RI-directed approaches.
- mice Human CD64 Tg animals 8 crossed with C57B16 (FI) or Balb/c mice (F12) were bred and maintained at the Transgenic Mouse Facility of the Central Animal Laboratory, Utrecht University, the Netherlands. C57B16 and Balb/c mice were obtained from Harlan (Horst, The Netherlands). 8-12 wk old human CD64-expressing animals were used in the experiments, as well as their NTg littermates. All experiments were approved by the Utrecht University animal ethics committee.
- the RF33 cell line expressing a TCR recognizing the H-2 b -restricted OVA epitope SIINFEKL 44 , and the OVA-specific DO 11.10 cell line, that recognizes the OVA peptide in an Ia d restricted way 45 , were cultured in RPMI 1640 medium (Gibco BRL, Life Technologies, Paisley, Scotland), supplemented with 10% heat-inactivated fetal bovine serum (FBS) (Fetalclone I, Hyclone, Logan, UT), 50 IU/ml penicillin (Gibco BRL) and 50 ⁇ g/ml streptomycin (Gibco BRL).
- FBS heat-inactivated fetal bovine serum
- the interleukin 2 (IL-2) dependent CTLL-2 cell line 46 was propagated in RPMI 1640 culture medium, with 10% FBS, 50 IU/ml penicillin, 50 ⁇ g/ml streptomycin and 100 U/ml IL-2 (Immunokine, Boehringer Ingelheim, Alkmaar, The Netherlands).
- Antibodies CD80 (clone 16-10A1), CD86 (clone GLl), CDl lc biotin (clone HL3), CD32/16 PE (clone 2.4G2), Gr-1 PE (clone RB6-8C5), CD45R/B220 biotin (clone RA3-6B2), CD3 FITC (clone 17A2) were obtained from PharMingen (BD Biosciences, BD PharMingen, San Diego, CA). CD64 PE and SA-PE were purchased from Becton Dickinson (BD Biosciences, San Jose, CA). F4/80 biotin (clone Cl: A3-1) was obtained from Serotec (Oxford, UK).
- CD40 PE (clone 3.23) was purchased from Immunotech (Marseille, France), and F(ab') 2 fragment mouse anti-rat IgG (H+L) was purchased from Jackson Immunoresearch (West Grace, PA).
- NLDC-145 47 and M5/114 anti-class II 48 were kindly provided by Dr. Georg Kraal (Vrije Universiteit, Amsterdam, The Netherlands).
- OVA 257-264 The immunodominant peptide of OVA, SIINFEKL (OVA 257-264), was obtained from Isogen (Maarssen, The Netherlands). Ovalbumin complexes were generated by incubation of 40 ⁇ g/ml chicken egg OVA (Sigma, StXouis, MO) with 80 ⁇ g/ml specific rabbit IgG serum (Sigma) for 20 min at 37°C. 22 ⁇ OVA conjugates were prepared using N-succinimidyl S-acetylthioactetate (S ATA) (Pierce, Rockford, IL) and SPDP (Pierce) as chemical cross-linkers. 49 22-OVA fusion protein was generated as follows.
- the N H and N L encoding regions of anti-CD64 monoclonal antibody H22 were obtained by PCR.
- the primers (purchased from GenoSys Biotechnologies, The Woodlands, TX) for N H were GATCGATCGATATCCAACTGGTGGAGAGCGGTG for the forward primer and GTACTCAGTCCGGAGCCGCCACCTCCTGAGCTCACGGTGACCGGGGTCCCTT G for the reverse primer.
- the primers for N were GTACTCAGTCCGGAGGTGGAGG
- the forward primer: ATAAGAATGCGGCCGCAGGCTCCATCGGCGCAGC and the reverse primer: ATAAGAATGCGGCCGCAGGGGAAACACATCTGC were used to perform PCR on the cDNA encoding the OVA sequence.
- the product was then digested and inserted into the 22 sFv containing pJG225 plasmid, producing a 22 sFv and ONA gene fusion (22-ONA).
- Trichopluscia ⁇ i Hi-5 insect cells (Invitrogen) were infected with high titer baculovirus encoding 22-ONA at a multiplicity of infection of 10. After four days, the supernatant was collected and concentrated and the protein construct was purified using a protein L column (Clontech, Palo Alto, CA). Purified protein constructs were run out on 6% acrylamide gels and stained with Coomassie brilliant blue to test for purity. In addition, all protein constructs were tested for lipopolysaccharide (LPS) contamination by the Limulus Amebocyte Lysate QCL-1000 assay kit (BioWhittaker, Walkersville, MD).
- LPS lipopolysaccharide
- CpG ODN Synthetic ODN were provided by Coley Pharmaceutical Corporation (Wellesley, MA). CpG ODN 1826 with the following sequence was used: TCCATGACGTTCCTGACGTT. In addition, CpG ODN were tested for LPS contamination by the Limulus Amebocyte Lysate QCL-1000 assay kit (BioWhittaker, Walkersville, MD).
- Bone-marrow derived DC were obtained as described by Inaba. 50 Briefly, bone marrow was flushed from mouse femurs, erythrocytes were lysed and cells were grown at l l0 6 /ml in filtered RPMI + (RPMI 1640 medium with 10% FBS, 50 IU/ml penicillin and 50 ⁇ g/ml streptomycin) in the presence of either 10 ng/ml granulocyte / macrophage colony-stimulating factor (GM-CSF; Immunex, Seattle, WA) or 10 ng/ml GM-CSF + 50 ng/ml tumor necrosis factor alpha (TNF- ⁇ ; Hycult, Uden, The Netherlands).
- GM-CSF granulocyte / macrophage colony-stimulating factor
- TNF- ⁇ tumor necrosis factor alpha
- Non-adherent cells were replated on day 1, and non-adherent cells were removed on days 2 and 4 from the cultures, with concomitant refreshment of culture media.
- Non-adherent and loosely adherent DC were harvested on days 7, 8, or 9.
- MHC class II antigen presentation assay DC7 or DC9 (1 x 10 5 cells) were washed twice in RPMI + and resuspended in 100 ⁇ l RPMI + /well. DC were incubated with various concentrations of ONA-IgG ⁇ ONA complexes and lxlO 5 DO 11.10 T cells for 24 h at 37°C. An excess of ONA (0.4 mg/ml) was used as a positive control. The presence of IL-2 released by the DO 11.10 cells was determined by culturing 5*10 3 IL-2 dependent CTLL-2 cells with various culture supernatants.
- DC7 (1 x 10 5 ) were washed twice in RPMI + medium and resuspended in 150 ⁇ l RPMlVwell. DC were incubated with ONA-IgG ⁇ ONA complexes, 22-ONA or 22 x ONA, either with or without 10 ⁇ g/ml CpG OD ⁇ 1826 for 24 h at 37°C.
- the SIINFEKL peptide (0.29 mg/ml) served as a positive control.
- cells were washed once with RPMI " medium (RPMI 1640 medium only) and fixed using 1.5 % paraformaldehyde for 20 min at RT.
- RF33 cells 1 10 5 , were added in a volume of 50 ⁇ l, and incubated for 36 h at 37°C. Hundred ⁇ l culture supernatant were harvested from each well. The presence of IL-2 released by the RF33 cells in culture supernatants was determined as above.
- Murine DC can be obtained in large numbers by culturing bone marrow cells with growth factors such as GM-CSF, GM-CSF/IL-4, or GM-CSF/TNF- ⁇ . Time of culture and specific types of growth factors used are critical for the maturation state and FcR expression profiles of DC. 50 ' 51,52 Immature DC, which are efficient in (receptor-mediated) uptake of antigens, are characterized by low/intermediate expression of co-stimulatory- and MHC class II molecules. When DC mature, co- stimulatory and MHC class II molecules are up-regulated, with concomitant down regulation of the capacity of receptor-mediated uptake and processing of exogenous antigens.
- growth factors such as GM-CSF, GM-CSF/IL-4, or GM-CSF/TNF- ⁇ .
- Immature DC can be triggered to develop into mature DC by inflammatory stimuli such as LPS. 55
- inflammatory stimuli such as LPS. 55
- Both GM- CSF (Fig. 7C) and GM-CSF/TNF- ⁇ DC showed maturation as reflected by up regulation of co-stimulatory molecules (such as CD40, CD80 and CD86), MHC class II, and DC markers (i.e. CDl lc and DEC-205).
- co-stimulatory molecules such as CD40, CD80 and CD86
- MHC class II MHC class II
- DC markers i.e. CDl lc and DEC-205
- DC maturation state is characterized not only by phenotype but also by function
- the MHC class II antigen-presenting capacity of DC7 and DC9 were tested.
- DC were either incubated with excess ONA (400 ⁇ g/ml), to assess the capacity of fluid phase antigen uptake and subsequent processing, or with 100 ng/ml ONA-IgG ⁇ ONA immune complexes, to study FcR-mediated uptake/processing.
- ONA-specific MHC class Il-restricted DO 11.10 T cells were used.
- ONA was administered at high concentrations, both human CD64-Tg (Fig.
- DC7 and DC9 were capable of fluid phase-triggered internalization and processing of ONA.
- levels of FcR-mediated ONA uptake, and subsequent MHC class II presentation were significantly lower in DC9. This indicated that a more mature DC phenotype (upon culture for 9 days) resulted in down- regulated receptor-mediated uptake and processing.
- GM-CSF DC7 were more effective in MHC class II antigen presentation, than GM-CSF/T ⁇ F- ⁇ DC7 (Fig. 8). This may be attributable to the fact that T ⁇ F- ⁇ triggers activation and functional maturation of DC 51 , which was reflected in less efficient FcR-mediated MHC class II antigen presentation.
- GM-CSF and GM- CSF/ T ⁇ F- ⁇ DC7 were used to study human CD64-mediated cross presentation in detail.
- CpG OD ⁇ can exhibit direct effects on DC differentiation and maturation and enhance cross presentation of MHC class I-restricted peptides and fluid phase- internalized antigens. 41
- CpG OD ⁇ activated DC7 as reflected by up regulation of co-stimulatory and MHC class II molecules and down regulation of FcR, such as human CD64, and mouse CD32/CD16 (Fig. 9).
- the DEC-205 molecule was down-regulated on DC by CpG OD ⁇ (Fig. 9), whereas LPS led to its up regulation (Fig. 7C). This finding may be attributable to the fact that DC are differentially sensitive to CpG OD ⁇ and LPS. 41
- Example 10 CpG OD ⁇ enhance cross presentation of human CD64-targeted antigens
- OVA was chemically cross-linked to whole IgG of monoclonal antibody H22 (22x0 V A) which results in a molecule targeting OVA to human CD64 that cross-links the receptor.
- DC7 were incubated with either 22 ⁇ OVA, or 22-OVA, with or without CpG ODN for 24 h.
- DC were fixed and subsequently incubated with MHC class I-restricted OVA-specific RF33 T cells for 36 h.
- Levels of IL-2 production by RF33 T cells were determined by CTLL proliferation. No human CD64-triggered cross presentation of OVA was observed with either Tg GM-CSF or GM-CSF/TNF- ⁇ DC7.
- CpG ODN enhance this cross- presentation.
- CpG ODN When co-cultured with DC, CpG ODN enhanced expression of co- stimulatory molecules, but triggered down regulation of FcR DC expression in vitro.
- CpG ODN also enhanced MHC class I-restricted peptide presentation, which was positively correlated with a more mature phenotype, as CpG ODN exhibited the largest effect on peptide presentation by GM-CSF/TNF- ⁇ DC.
- FcR-mediated cross presentation of OVA-IgG ⁇ OVA immune complexes was two- to four-fold up-regulated upon CpG ODN activation, in spite of the fact that CpG ODN down-regulated FcR expression levels (Fig. 9).
- FcR-mediated antigen presentation has been reported to be 100- to 1000-fold more efficient, compared to fluid- phase-mediated presentation.
- the results described in Examples 6-10 document for the first time the capacity of CpG ODN to further enhance FcR-mediated cross- presenting processes, in spite of inducing maturation (and concomitant down regulation of FcR).
- CpG ODN activation can improve DC-based vaccine therapies.
- Human CD64 exhibits the capacity to efficiently internalize antigens, without a need for massive receptor cross-linking. 34 ' 62
- the data shown in Examples 6- 10 also show that such cross-linking appeared also unnecessary for cross presentation. This shows that human CD64 has relatively easy access to the cross-presenting machinery.
- DC represent the most potent initiators of immune responses 25 ' 40 , and are capable of funneling exogenous antigens through the MHC class I-restricted antigen presentation pathway 29 ' 41 , they represent important tools for the development of new therapeutic concepts.
- the data obtained from the studies described in Examples 6-10 confirms that human CD64 is capable of triggering DC cross presentation and that CpG ODN enhance this effect.
- the data also show that CD64 expression is restricted to myeloid cells (in contrast to other FcR family members) 31 . Accordingly, CpG ODN in combination with CD64-targeting approaches offers a significant improvement over previous DC-based immunotherapies.
- Fc receptors modulate in vivo cytoxicity against tumor targets. Nat.Med., 6: 443-446,
- IgG FcyRI; CD64
- tumor necrosis factor D in modulating the quantity of peripheral blood- derived, cytokine-driven human dendritic cells and its role in enhancing the quality of dendritic cell function in presenting soluble antigens to CD4+ T cells in vitro.
- IL-10 stimulates monocyte FcD R surface expression and cytotoxic activity. Distinct regulation of antibody-dependent cellular cytotoxicity by IF ⁇ -gamma, IL-4, and IL-10. J. Immunol. 149:4048.
Abstract
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EP1628531A2 (en) * | 2003-05-16 | 2006-03-01 | Hybridon, Inc. | Synergistic treatment of cancer using immunomers in conjunction with chemotherapeutic agents |
WO2006079291A1 (en) * | 2005-01-27 | 2006-08-03 | Changchun Huapu Biotechnology Co., Ltd. | Artificial synthetic single strand deoxynucleotide and vaccine composition thereof and the use |
US7956043B2 (en) | 2002-12-11 | 2011-06-07 | Coley Pharmaceutical Group, Inc. | 5′ CpG nucleic acids and methods of use |
US7998492B2 (en) | 2002-10-29 | 2011-08-16 | Coley Pharmaceutical Group, Inc. | Methods and products related to treatment and prevention of hepatitis C virus infection |
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US6977245B2 (en) | 1999-04-12 | 2005-12-20 | The United States Of America As Represented By The Department Of Health And Human Services | Oligodeoxynucleotide and its use to induce an immune response |
US20010044416A1 (en) * | 2000-01-20 | 2001-11-22 | Mccluskie Michael J. | Immunostimulatory nucleic acids for inducing a Th2 immune response |
US7666674B2 (en) | 2001-07-27 | 2010-02-23 | The United States Of America As Represented By The Secretary Of The Department Of Health And Human Services | Use of sterically stabilized cationic liposomes to efficiently deliver CPG oligonucleotides in vivo |
WO2003020884A2 (en) * | 2001-08-14 | 2003-03-13 | The Government Of The United States Of America As Represented By The Secretary Of Health And Human Services | Method for rapid generation of mature dendritic cells |
AU2002366710A1 (en) | 2001-12-20 | 2003-07-09 | The Government Of The United States Of America As Represented By The Secretary Of The Department Of | USE OF CpG OLIGODEOXYNUCLEOTIDES TO INDUCE ANGIOGENESIS |
US8466116B2 (en) | 2001-12-20 | 2013-06-18 | The Unites States Of America As Represented By The Secretary Of The Department Of Health And Human Services | Use of CpG oligodeoxynucleotides to induce epithelial cell growth |
US8263091B2 (en) * | 2002-09-18 | 2012-09-11 | The United States Of America As Represented By The Secretary Of The Department Of Health And Human Services | Method of treating and preventing infections in immunocompromised subjects with immunostimulatory CpG oligonucleotides |
US20060121023A1 (en) * | 2004-12-07 | 2006-06-08 | George Weiner | Method to decrease nonspecific staining by Cy5 |
EP3552625A1 (en) | 2008-06-27 | 2019-10-16 | Zoetis Services LLC | Novel adjuvant compositions |
PT2560658T (en) | 2010-04-21 | 2017-05-26 | Ventirx Pharmaceuticals Inc | Enhancing antibody-dependent cellular cytotoxicity |
EP2611834B1 (en) | 2010-09-01 | 2018-03-07 | Biogen MA Inc. | Rapid generation of anti-idiotypic antibodies |
EP3049105B1 (en) | 2013-09-19 | 2020-12-30 | Moredun Research Institute | Vaccine |
CN114699518A (en) | 2015-01-16 | 2022-07-05 | 硕腾服务有限责任公司 | Foot and mouth disease vaccine |
JP6602958B2 (en) * | 2015-05-20 | 2019-11-06 | イミュンワーク インク. | Molecular constructs having targeting and effector components and uses thereof |
WO2022192268A1 (en) * | 2021-03-10 | 2022-09-15 | University Of Iowa Research Foundation | Methods of enhancing antibody therapies |
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Cited By (5)
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US7998492B2 (en) | 2002-10-29 | 2011-08-16 | Coley Pharmaceutical Group, Inc. | Methods and products related to treatment and prevention of hepatitis C virus infection |
US7956043B2 (en) | 2002-12-11 | 2011-06-07 | Coley Pharmaceutical Group, Inc. | 5′ CpG nucleic acids and methods of use |
EP1628531A2 (en) * | 2003-05-16 | 2006-03-01 | Hybridon, Inc. | Synergistic treatment of cancer using immunomers in conjunction with chemotherapeutic agents |
EP1628531A4 (en) * | 2003-05-16 | 2010-06-30 | Idera Pharmaceuticals Inc | Synergistic treatment of cancer using immunomers in conjunction with chemotherapeutic agents |
WO2006079291A1 (en) * | 2005-01-27 | 2006-08-03 | Changchun Huapu Biotechnology Co., Ltd. | Artificial synthetic single strand deoxynucleotide and vaccine composition thereof and the use |
Also Published As
Publication number | Publication date |
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CA2456193A1 (en) | 2003-03-27 |
EP1501359A2 (en) | 2005-02-02 |
WO2003025119A3 (en) | 2004-12-02 |
US20030072762A1 (en) | 2003-04-17 |
EP1501359A4 (en) | 2007-04-18 |
JP2005518343A (en) | 2005-06-23 |
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