207 results about "Receptor antibody" patented technology

The present invention provides methods of re-engineering or re-shaping an antibody from a first species, wherein the re-engineered or re-shaped antibody does not elicit undesired immune response in a second species, and the re-engineered or re-shaped antibody retains substantially the same antigen binding-ability of the antibody from the first species. In accordance with the present invention, a combinatorial library comprising the CDRs of the antibody from the first species fused in frame with framework regions derived from a second species can be constructed and screened for the desired modified antibody. In particular, the present invention provides methods utilizing low homology acceptor antibody frameworks for efficiently humanizing an antibody or a fragment thereof. The present invention also provides antibodies produced by the methods of the invention.

Antibodies, humanized antibodies, resurfaced antibodies, antibody fragments, derivatized antibodies, and conjugates of same with cytotoxic agents, which specifically bind to, and inhibit, insulin-like growth factor-I receptor, antagonize the effects of IGF-I, IGF-II and serum on the growth and survival of tumor cells, and which are substantially devoid of agonist activity. Said antibodies and fragments thereof may be used, optionally in conjunction with other therapeutic agents, in the treatment of tumors that express elevated levels of IGF-I receptor, such as breast cancer, colon cancer, lung cancer, ovarian carcinoma, synovial sarcoma, prostate cancer and pancreatic cancer, and said derivatized antibodies may be used in the diagnosis and imaging of tumors that express elevated levels of IGF-I receptor.

The present invention relates to compositions and methods for inducing cell death or stasis in cancer cells or other hyperproliferative cells using anti-EphA2 or anti-EphA4 antibodies conjugated to toxins.

The present inventors succeeded in discovering specific amino acid mutations in the variable region, framework region, and constant region of TOCILIZUMAB, and this enables to reduce immunogenicity risk and the heterogeneity originated from disulfide bonds in the hinge region, as well as to improve antigen binding activity, pharmacokinetics, stability under acidic conditions, and stability in high concentration preparations.

The present invention provides a mesothelioma therapeutic agent containing an interleukin-6 (IL-6) antagonist such as antibody to IL-6 receptor (IL-6R), and a mesothelioma cell growth inhibitor containing an IL-6 antagonist such as antibody to IL-6R.

Antibodies, humanized antibodies, resurfaced antibodies, antibody fragments, derivatized antibodies, and conjugates of these molecules with cytotoxic agents, which specifically bind to and inhibit insulin-like growth factor-I receptor, antagonize the effects of IGF-I and are substantially devoid of agonist activity toward the insulin-like growth factor-I receptor. These molecules can be conjugated to cytotoxic agents for use in the treatment of tumors that express elevated levels of IGF-I receptor, such as breast cancer, colon cancer, lung cancer, ovarian carcinoma, synovial sarcoma and pancreatic cancer. These molecules can also be labeled for in vitro and in vivo diagnostic uses, such as in the diagnosis and imaging of tumors that express elevated levels of IGF-I receptor.

A therapeutic agent for myeloma comprising a combined use of a nitrogen mustard anticancer agent and anti-IL-6 receptor antibody. Thus, a therapeutic agent for myeloma comprising anti-IL-6 receptor antibody for use in combination with a nitrogen mustard anticancer agent; a therapeutic agent for myeloma comprising a nitrogen mustard anticancer agent for use in combination with anti-IL-6 receptor antibody; and a therapeutic agent for myeloma comprising a nitrogen mustard anticancer agent and anti-IL-6 receptor antibody.

The present inventors assessed the effect of anti-IL-6 receptor antibodies in suppressing chronic rejection reaction. They assessed the effect of anti-mouse IL-6 receptor antibody (MR16-1) administration in suppressing the chronic rejection reaction using a mouse model for post-heart-transplantation chronic rejection. The result of histopathological analysis of transplanted hearts extirpated 60 days after transplantation revealed that fibrosis of myocardium and vascular stenotic lesions, which are pathological conditions characteristic of the chronic rejection reaction, were significantly suppressed in the MR16-1-treated group as compared to the control group. Thus, MR16-1 administration was demonstrated to have the effect of suppressing chronic rejection reaction. Specifically, the present inventors discovered for the first time that the rejection reaction in the chronic phase after organ transplantation was suppressed by administering an anti-IL-6 receptor antibody.

The present inventors investigated the antitumor effects of anti-IL-6 receptor antibodies against prostate cancer. The result showed that the anti-IL-6 receptor antibodies had both in vivo and in vitro antitumor effects against prostate cancer. It was also revealed that the hPM1 antitumor effect is via IL-6 receptor.

The present application discloses methods for treating an IL-6-mediated disorder such as rheumatoid arthritis (RA), juvenile idiopathic arthritis (JIA), systemic JIA (sJIA), polyarticular course JIA (pcJIA), systemic sclerosis, or giant cell arteritis (GCA), with subcutaneously administered antibody that binds interleukin-6 receptor (anti-IL-6R antibody). In particular, it relates to identification of a fixed dose of anti-IL-6R antibody, e.g. tocilizumab, which is safe and effective for subcutaneous administration in patients with IL-6-mediated disorders. In addition, formulations and devices useful for subcutaneous administration of an anti-IL-6R antibody are disclosed.

The effect of anti-IL-6 receptor antibodies in suppressing cytotoxic T cell induction was examined. The results showed that CTL activity against alloantigens was statistically significantly reduced in mice treated with anti-IL-6 receptor antibodies as compared to mice not treated with antibodies and mice treated with a control antibody. The anti-IL-6 receptor antibody was also administered to recipients of a mouse model for allogenic heart transplantation. As a result, histopathological findings showed that inflammatory cell infiltration into transplanted hearts was suppressed and the survival period of transplanted hearts was significantly prolonged. Thus, the present inventors for the first time discovered that administration of anti-IL-6 receptor antibodies could suppress cytotoxic T cell induction and thereby suppress acute rejection after transplantation.

A preventive and / or therapeutic agent for systemic lupus erythematosus comprising an anti-interleukin-6 (IL-6) receptor antibody as an active ingredient.

The present inventors investigated the effects of anti-IL-6 receptor antibodies on improving the condition of infarcted areas in myocardial infarction, and on suppressing left ventricular remodeling after myocardial infarction. As a result, the administration of anti-IL-6 receptor antibodies significantly suppressed the increase of MPO activity in the infarcted area and suppressed myocardial MCP-1 expression in both the infarcted area and the non-infarcted area. Furthermore, echocardiography and histological examinations revealed that cardiac hypertrophy is also suppressed.

The present inventors used a model of intrasplenically induced liver metastasis to determine whether or not NF-κB activation in the liver is involved in the onset of metastatic tumors. When IKKβ was deleted from both liver cells and hematopoietically-derived cells, the onset of tumors was reduced remarkably. Tumor cells activated neighboring bone marrow cells (Kupffer cells) and produced mitogens such as interleukin (IL)-6, and this promoted angiogenesis and growth of tumors. The mitogen production depended on NF-κB in hematopoietically-derived Kupffer cells. Furthermore, treatment with an anti-IL-6 receptor antibody decreased the degree of metastatic tumor development. That is, the present inventors showed that tumor metastasis depends on inflammation, and proinflammatory intervention that targets Kupffer cells is useful for chemical prevention of metastatic tumors. Furthermore, it was shown that inhibition of the IKKβ / NF-κB signal transduction pathway, in particular IL-6 inhibition, can be utilized for anti-metastasis agents.

Methods and compositions comprising GnRH-I and GnRH-II, GnRH-I and GnRH-II antibodies, anti-receptor antibodies, polynucleotide constructs and GnRH-I and GnRH-II analogs for immune enhancement and suppression, prevention and treatment of diseases and conditions characterized by abnormal T-cell activity, treatment of viral and prion-related diseases, and treatment of T-cell related neoplastic diseases are disclosed.

The present invention is directed to the production and use of monoclonal antibodies, or antigen binding fragments thereof, that specifically bind the T cell antigen receptor (TCR) and their use for immunomodulation. In preferred embodiments, the antibody or antigen binding fragment of the invention specifically binds the constant region of the α chain of the TCR, or otherwise specifically binds the α chain regardless of TCR clonal origin (i.e., is pan specific for TCR). The antibodies of the invention may be used, for example, in immunosuppressive therapies for transplant maintenance and the treatment of autoimmune diseases, and / or as targeting molecules for use in the treatment of T-cell malignancies.

This invention relates to compositions and methods comprising “lymphotoxin-β receptor blocking agents”, which block lymphotoxin-β receptor signalling. Lymphotoxin-β receptor blocking agents are useful for treating lymphocyte-mediated immunological diseases, and more particularly, for inhibiting Th1 cell-mediated immune responses. This invention relates to soluble forms of the lymphotoxin-β receptor extracellular domain that act as lymphotoxin-β receptor blocking agents. This invention also relates to the use of antibodies directed against either the lymphotoxin-β receptor or its ligand, surface lymphotoxin, that act as lymphotoxin-β receptor blocking agents. A novel screening method for selecting soluble receptors, antibodies and other agents that block LT-β receptor signalling is provided.

This invention provides an agonist antibody to a human thrombopoietin receptor (alias: human c-Mpl). More particularly, this invention provides an agonist antibody to a human thrombopoietin receptor, wherein the agonist antibody comprises: antibody constant regions comprising (1) amino acid sequences in a heavy chain constant region and a light chain constant region of a human antibody, (2) an amino acid sequence of a heavy chain constant region with a domain substituted between human antibody subclasses, and an amino acid sequence of a light chain constant region of a human antibody, or (3) amino acid sequences comprising a deletion(s), substitution(s), addition(s), or insertion(s) of one or several amino acid residues in the amino acid sequences of (1) or (2) above; and antibody variable regions capable of binding to and activating a human thrombopoietin receptor; and wherein the agonist antibody has the properties: (a) that the antibody induces colony formation at a concentration of 10,000 ng / ml or lower as determined by the CFU-MK colony formation assay using human umbilical-cord-blood-derived CD34+ cells; and (b) that the antibody has a maximal activity at least 50% higher than that of PEG-rHuMGDF and an 50% effective concentration (EC50) of 100 nM or less in the cell proliferation assay using UT7 / TPO cell. Also provided is a pharmaceutical composition for treating thrombocytopenia comprising said antibody.

Disclosed are immunogenic Nogo receptor-1 polypeptides, Nogo receptor-1 antibodies, antigen-binding fragments thereof, soluble Nogo receptors and fusion proteins thereof and nucleic acids encoding the same. Also disclosed are compositions comprising, and methods for making and using, such Nogo receptor antibodies, antigen-binding fragments thereof, soluble Nogo receptors and fusion proteins thereof and nucleic acids encoding the same.

Use of antagonists to IL-31Ra and OSMRb are used to treat inflammation and pain by inhibiting, preventing, reducing, minimizing, limiting or minimizing stimulation in neuronal tissues. Such antagonists include soluble receptors, antibodies and fragments, derivative, or variants thereof. Symptoms such as pain, tingle, sensitization, tickle associated with neuropathies are ameliorated.