126 results about "Antibody block" patented technology

The invention provides antibodies specific for HIV env, including monoclonal antibodies and related hybridomas. The antibodies block CD4 / g120 binding and reduce reverse transcriptase activity in vitro.

Human breast tumors contain hetrogeneous cancer cells. using an animal xenograft model in which human breast cancer cells were grown in immunocompromised mice we found that only a small minority of breast cancer cells had capacity to form new tumors. The ability to form new tumors was not a slochastic property, rather certain populations of cancer cells were depleted for the ability to form new tumors, while other populations were enriched for the ability to form new tumors. Tumorigenic cells could be distinguished from non-tumorigenic cancer cells based on surface marker expression. We prospectively identified and isolated the tumorigenic cells as CD4430CD24− / lowLINEAGE A few as 100 cells from this population were able to form tumors the animal xenograft model, while tens of thousands of cells from non-tumorigenic populations failed to form tumors. The tumorigenic cells could be serially passaged, each time generating new tumors containing and expanded numbers of CD44+CD24 Lineage tumorigenic cells as well as phenotypically mixed populations of non-tumorigenic cancer cells. This is reminiscent of the ability of normal stem cells to self-renew and differentiate. The expression of potential therapeutic targets also differed between the tumorigenic and non-tumorigenic populations. Notch activation promoted the survival of the tumorigenic cells, and a blocking antibody against Notch 4 induced tumorigenic breast cancer cells to undergo apoptosis.

A method for reversing expression of malignant phenotype in cancer cells is described. The method comprises applying beta 1 integrin function-blocking antibody to the cells. The method can be used to assess the progress of cancer therapy. Human breast epithelial cells were shown to be particularly responsive.

Methods for improved targeting of antibody, antibody fragments, peptides hormones, steroid hormones and conjugates thereof are disclosed. Enhanced delivery to target cells of antibodies or fragments thereof or other receptor-mediated delivery system, such as peptide, specific for a population of cells of a mammal comprises steps of administering to said mammal an adequate dosage of blocking antibodies or fragments thereof or other receptor-mediated delivery system, such as peptide, and administering to said mammal an effective dosage of said antibodies or fragments thereof or other receptor-mediated delivery system, such as peptide, specific for said population of cells. In the preferred embodiment, the specific antibodies are monoclonal antibodies directed toward tumor-associated antigen in man.

Anti-glucan antibodies have been found to be protective against systemic fungal infection with C. albicans, but the protective efficacy can be inhibited by blocking antibodies. The invention provides an immunogenic composition comprising a glucan and a pharmaceutically acceptable carrier, characterised in that, when administered to a mammalian recipient, the composition elicits protective anti-glucan antibodies but does not elicit antibodies which inhibit the protective efficacy of the anti-glucan anti-bodies. The glucan may be presented on the surface of a protease-treated microbial cell or may be presented as a protein-glucan conjugate. The glucan may be substituted by a glucan mimotope, a peptidomimetic of a glucan mimotope, or nucleic acid encoding a mimotope. Anti-glucan-antibodies show broad spectrum microbicidal activity. B-glucans are preferred, particularly those containing one or more B-1,6 linkages

The present invention relates to compounds, small interfering RNAs and compositions and methods of inhibiting tumorigenesis using agents that inhibit the sonic hedgehog and GLI signaling pathway, including agents that inhibit GLI expression, synthesis and / or function. The present invention also relates to particular biomarkers that can be used in the diagnosis and prognosis of cancer. Methods of treating cancer, including glioblastomas, medulloblastomas, basal cell carcinomas, prostate cancer and small cell and non-small cell lung cancer are also provided using small organic compounds, siRNAs and blocking antibodies that inhibit or block the SHH / GLI pathway.

Provided is an anticancer agent which comprises an anti-PD-1 antibody or an anti-PD-L1 antibody as an active ingredient, functioning to reverse the unresponsiveness of iNKT cells in which anergy has been induced by administration with an iNKT cell ligand. The anti-PD-1 or anti-PD-L1 antibody blocks the PD-1 / PD-L1-mediated signaling pathway not only to prevent the iNKT cell ligand-induced iNKT cell anergy, but also to reverse the unresponsiveness of already anergic iNKT cells to produce cytokines. In addition, the anti-PD1 or anti-PD-L1 antibody ensures the potent anti-tumor activity of iNKT cells as demonstrated by a significant reduction in the number of metastatic nodules in B16F10 melanoma metastasis models in vivo. Collectively, the anticancer agent can be very useful in the treatment of cancer, particularly metastatic cancer.

The present invention is related to antibodies with binding affinity to fibroblast growth factor receptor 2 (FGFR2) optionally with binding affinity to other FGF receptors, which block both ligand-dependent and constitutive ligand independent receptor activation. Specifically, the present invention relates to antibodies with high affinity to more than one FGF receptor subtype, and fragments thereof, useful in treating disorders including cell proliferative diseases.

Novel monoclonal antibodies that specifically bind to KAAG1 are described. In some embodiments, the antibodies block the biological activity of KAAG1 and are useful in composition in certain cancers, more particularly in cancers that have increased cell surface expression of KAAG1, such as ovarian, renal, lung, colorectal, breast, brain, and prostate cancer, as well as melanoma. The invention also relates to cells expressing the monoclonal antibodies and antigen binding fragments such as humanized and chimeric antibodies. Additionally, methods of detecting and treating cancer using the antibodies and fragments are also disclosed.

Nanosecond pulsed electric field (nsPEF) treatments of a tumor are used to cause the tumor to express calreticulin and stimulate an immune response against the tumor and other tumors in a subject. An immune response biomarker can be measured, and further nsPEF treatments can be performed if needed to stimulate or further stimulate the immune response. Cancers that have metastasized may be treated. The treatment can be combined with CD47-blocking antibodies, doxorubicin, CTLA-4-blocking antibodies, and / or PD-1-blocking antibodies. Electrical characteristics of nsPEF treatments can be based on the size, type, and / or strength of tumors and / or a quantity of tumors in the subject.

The present invention relates to compounds, small interfering RNAs and compositions and methods of inhibiting tumorigenesis and methods of inhibiting tumor cell growth and proliferation using agents that inhibit the hedgehog and Gli signaling pathway, including agents that inhibit GLI synthesis and / or function. The present invention also relates to particular biomarkers that can be used in the diagnosis and prognosis of prostate cancer. Methods of treating cancer, including prostate cancer are also provided using small organic compounds, siRNAs and blocking antibodies that inhibit or block the SHH / GLI pathway.

The invention concerns a pharmaceutical composition comprising, as the active ingredient, human natural antibodies of the IgG isotype, that neutralize the activity of a human cytokine selected from VEGF, IFNα, IL-4, TNFα and TGFβ, the said neutralizing antibodies inhibiting at least 50% of the maximum biological activity induced by an amount ranging from 0.006 ng to 0.05 ng of the said cytokine in vitro.

Provided is an anticancer agent which comprises an anti-PD-1 antibody or an anti-PD-L1 antibody as an active ingredient, functioning to reverse the unresponsiveness of iNKT cells in which anergy has been induced by administration with an iNKT cell ligand. The anti-PD-1 or anti-PD-L1 antibody blocks the PD-1 / PD-L1-mediated signaling pathway not only to prevent the iNKT cell ligand-induced iNKT cell anergy, but also to reverse the unresponsiveness of already anergic iNKT cells to produce cytokines. In addition, the anti-PD1 or anti-PD-L1 antibody ensures the potent anti-tumor activity of iNKT cells as demonstrated by a significant reduction in the number of metastatic nodules in B16F10 melanoma metastasis models in vivo. Collectively, the anticancer agent can be very useful in the treatment of cancer, particularly metastatic cancer.

The present invention is related to antibodies with binding affinity to fibroblast growth factor receptor 2 (FGFR2) optionally with binding affinity to other FGF receptors, which block both ligand-dependent and constitutive ligand independent receptor activation. Specifically, the present invention relates to antibodies with high affinity to more than one FGF receptor subtype, and fragments thereof, useful in treating disorders including cell proliferative diseases.

Methods of treatment to suppress an immune response are provided. The method comprises administering to a subject in need of treatment a naked blocking antibody that binds selectively iNKT cells in an amount effective to suppress the subject's iNKT cell function. Compositions comprising, an isolated, humanized antibody that binds selectively iNKT cells are also provided.

Antibodies are disclosed which bind specifically to P-selectin and which block the binding of PSGL-1 to P-selectin. These anti-P-selectin antibodies may also cause dissociation of preformed P-selectin / PSGL-1 complexes. The disclosure identifies a heretofore unrecognized, near N-terminal, antibody binding domain (a conformational epitope) of P-selectin to which the function-blocking antibodies (which may be chimeric, human or humanized antibodies for example) bind. Antibodies are disclosed which bind to the conformational epitope of P-selectin and which have a dual function in blocking binding of PSGL-1 to P-selectin, and in causing dissociation of preformed P-selectin / PSGL-1 complexes. Such single and dual function anti-P-selectin antibodies and binding fragments thereof may be used in the treatment of a variety of inflammatory and thrombotic disorders and conditions. Screening methods for identifying such antibodies are also disclosed.

Antibodies are disclosed which bind specifically to P-selectin and which block the binding of PSGL-1 to P-selectin. These anti-P-selectin antibodies may also cause dissociation of preformed P-selectin / PSGL-1 complexes. The disclosure identifies a heretofore unrecognized, near N-terminal, antibody binding domain (a conformational epitope) of P-selectin to which the function-blocking antibodies (which may be chimeric, human or humanized antibodies for example) bind. Antibodies are disclosed which bind to the conformational epitope of P-selectin and which have a dual function in blocking binding of PSGL-1 to P-selectin, and in causing dissociation of preformed P-selectin / PSGL-1 complexes. Such single and dual function anti-P-selectin antibodies and binding fragments thereof may be used in the treatment of a variety of inflammatory and thrombotic disorders and conditions. Screening methods for identifying such antibodies are also disclosed.

Novel monoclonal antibodies that specifically bind to KAAG1 are described. In some embodiments, the antibodies block the biological activity of KAAG1 and are useful in composition in certain cancers, more particularly in cancers that have increased cell surface expression of KAAG1, such as ovarian, renal, lung, colorectal, breast, brain, and prostate cancer, as well as melanoma. The invention also relates to cells expressing the monoclonal antibodies and antigen binding fragments such as humanized and chimeric antibodies. Additionally, method of detecting and treating cancer using the antibodies and fragments are also disclosed.

The structure, formation and use of blocked antibodies, especially those blocked with Protein A, or active fragments of Protein A, are disclosed as well as processes of producing such antibodies. The uses of such blocked antibodies to achieve significant reduction in both specific cross-reaction and non-specific interaction thereby increasing specificity and reactivity with targeted antigenic sites is also described.

Antibodies are disclosed which bind specifically to P-selectin and which block the binding of PSGL-1 to P-selectin. These anti-P-selectin antibodies may also cause dissociation of preformed P-selectin / PSGL-1 complexes. The disclosure identifies a heretofore unrecognized, near N-terminal, antibody binding domain (a conformational epitope) of P-selectin to which the function-blocking antibodies (which may be chimeric, human or humanized antibodies for example) bind. Antibodies are disclosed which bind to the conformational epitope of P-selectin and which have a dual function in blocking binding of PSGL-1 to P-selectin, and in causing dissociation of preformed P-selectin / PSGL-1 complexes. Such single and dual function anti-P-selectin antibodies and binding fragments thereof may be used in the treatment of a variety of inflammatory and thrombotic disorders and conditions. Screening methods for identifying such antibodies are also disclosed.

The invention provides a combined medication combination for tumor immunotherapy. The combined medication combination contains an effective dose of an acyl coenzyme A: cholesterol acyltransferase ACAT1 inhibitor and an effective dose of an immune detection point blocking antibody. The invention further provides a combined medication method for the tumor immunotherapy. By inhibiting the acyl coenzyme A: cholesterol acyltransferase ACAT1, the killing activity of CD8 T cells to tumors can be enhanced, and the acyl coenzyme A: cholesterol acyltransferase ACAT1 and the immune detection point blocking antibody can generate a synergic effect in combined medication, so that the inhibition to the tumors can be further enhanced.

Biomarkers are described for predicting the efficacy, risk of relapse, risk of an immune related adverse event (irAE), or combination thereof for a CTLA-4 blockade treatment, such as ipilimumab, in a subject with melanoma. Biomarkers are also described for predicting the efficacy and clinical benefit for a PD-1 blockade treatment, such as a PD-1 blocking antibody, in a subject with melanoma.

The invention discloses an indirect blocking ELISA (Enzyme-Linked Immuno Sorbent Assay) detection kit of an antibody of porcine torque teno virus type II, which comprises an antibody detecting board, an enzyme conjugate working solution, a sample diluent, a coloration solution A, a coloration solution B, a termination solution, a blocking antibody and a washing buffer solution, wherein the blocking antibody is a polyclonal antibody which is obtained in rabbits after purified TTV2 (Torque Teno Virus type II) -ORF1 (Open Reading Frame1) gene antigen epitope area protein immunizes the rabbits. The kit has the beneficial effects of strong specificity and simpleness in operation, is suitable for large-scale clinical popularization and application, and has a good market prospect.

The invention discloses a PCR amplification detection method, which comprises the following steps: 1) constructing a PCR reaction system including: a buffer solution, a dATP solution, a dCTP solution, a dGTP solution and a dTTP solution, an upstream primer, a downstream primer and a probe, that are complementary with a detection sample, and a bis-hot-start DNA polymerase, which is formed by mixing chemical-modified hot-start Taq enzyme and nano-antibody-blocked hot-start Taq enzyme according to concentration ratio of 1:1; 2) blending the PCR reaction system with a detection sample to perform PCR amplification; 3) acquiring circulation threshold value after the PCR amplification, and according to the circulation threshold value, determining the quantity of a to-be-detected substance in the detection sample. In the invention, the nano-antibody is selected for preparing the hot-start Taq enzyme to form the bis-hot-start DNA polymerase, so that the PCR amplification detection method not only can simulate a polymerase monoclonal antibody for application in hot-start PCR, but also can functionally replace the monoclonal antibody, which is poor in stability and is greatly reduced in preparation cost.

The invention discloses a targeted Claudin-4 developer without influences on permeability between epithelial cells for positron emission computed tomography, which is a F marked polypeptide consisting of 16 amino acid residues. With shortened peptide chain, the polypeptide developer of the invention have importance biological properties of avoiding influence on the permeability between the epithelial cells, increasing the basement membrane permeability of the epithelial cells, reducing antigenicity and the like. The properties enable the developer to detect tumor lesion under the condition of constant tumor tissue microenvironments (such as blood flow, oxygenation, bioactive molecule distribution, pH value and cell apoptosis body removal) and to reduce interference from repeatedly used and inducible blocking antibodies at the same time.

The invention discloses an A-type H1 subtype influenza virus antibody blocking ELISA kit. The kit comprises: a) an A-type H1 subtype influenza virus A-Influ / JML-F9; b) a monoclonal antibody with strong specificity of an A-type H1 subtype influenza virus-resistant hemagglutinin protein; c) an antibody blocking ELISA core kit prepared from the monoclonal antibody of the A-type H1 subtype influenza virus-resistant hemagglutinin protein; and d) a sample diluting liquid, 10 times of a washing liquid, a substrate liquid A, a substrate liquid B, a reaction stop solution, a positive control sample and a negative control sample in the kit. The invention also discloses applications of the A-type H1 subtype influenza virus antibody blocking ELISA kit in A-type H1 subtype influenza virus antibody detection. The kit has strong specificity, high sensitivity, short detection time, easy and practical operation, and no need of being operated by a professional person. The kit is good in stability and long in retention period, and solves a problem of the A-type H1 subtype influenza virus antibody detection.

This invention relates, e.g., to methods for inhibiting or stimulating an activity of an adrenomedullin (AM) or gastrin releasing peptide (GRP) peptide hormone, comprising contacting the peptide with a small molecule, non-peptide, modulatory agent of the invention. Complexes of these modulatory agents with other components, such as the peptides or blocking antibodies specific for the peptides, are also described, as are pharmaceutical compositions comprising the modulatory agents, and methods for using the modulatory agents to diagnose or treat patients.

The invention discloses a method for treating septicemia with human neutrophil peptide (HNP) blocking agents. The method comprises the following steps of: preparing small interfering RNA (siRNA) and anti-HNP antibody blocking agents and the like, and blocking, neutralizing and reducing the yield, the function and the biological activity of HNP. The siRNA is prepared in vitro through a design and a chemical synthesis method. A HNP-1 polypeptide is produced through a design to be cross-linked with KLH (Keyhole Limpet Hemocyanin) and then to immunize an experimental rabbit, and a rabbit immune globulin is obtained. The same one HNP-1 polypeptide is used for immunizing a mouse, an anti-HNP antibody variable region is prepared, and then a humanized monoclonal anti-HNP-1 antibody is prepared. Both of the siRNA and the anti-HNP-1 antibody can effectively block, neutralize and reduce the yield, the function and the biological activity of HNP, so that the method can be used for treating septicemia and other related diseases caused by bacterial infections.