814 results about "Target antigen" patented technology

This invention relates to monovalent and multivalent, monospecific binding proteins and to multivalent, multispecific binding proteins. One embodiment of these binding proteins has one or more binding sites where each binding site binds with a target antigen or an epitope on a target antigen. Another embodiment of these binding proteins has two or more binding sites where each binding site has affinity towards different epitopes on a target antigen or has affinity towards either a target antigen or a hapten. The present invention further relates to recombinant vectors useful for the expression of these functional binding proteins in a host. More specifically, the present invention relates to the tumor-associated antigen binding protein designated RS7, and other EGP-1 binding-proteins. The invention further relates to humanized, human and chimeric RS7 antigen binding proteins, and the use of such binding proteins in diagnosis and therapy.

This invention relates to monovalent and multivalent, monospecific antibodies and to multivalent, multispecific antibodies. One embodiment of these antibodies has one or more identical binding sites where each binding site binds with a target antigen or an epitope on a target antigen. Another embodiment of these antibodies has two or more binding sites where these binding sites have affinity towards different epitopes on a target antigen or different target antigens, or have affinity towards a target antigen and a hapten. The present invention further relates to recombinant vectors useful for the expression of these functional antibodies in a host. More specifically, the present invention relates to the tumor-associated antibody designated PAM4. The invention further relates to humanized and human PAM4 antibodies, and the use of such antibodies in diagnosis and therapy.

This invention discloses methods and compositions for modulating immune responses, which involve particulate delivery of agents to immune cells, wherein the agents comprise an inhibitor of the NF-κB signaling pathway and an antigen that corresponds to a target antigen. The methods and compositions of the present invention are particularly useful in the treatment or prophylaxis of an undesirable immune response associated with the target antigen, including autoimmune diseases, allergies and transplantation associated diseases.

Nanoparticles that activate complement in the absence of biological molecules are described. The nanoparticles are shown to specifically target antigen presenting cells in specifically in lymph nodes, without the use of a biological molecule for targeting. These particles are useful vehicles for delivering immunotherapeutics.

Nanoparticles that activate complement in the absence of biological molecules are described. The nanoparticles are shown to specifically target antigen presenting cells in specifically in lymph nodes, without the use of a biological molecule for targeting. These particles are useful vehicles for delivering immunotherapeutics. Surface chemistries and chemical formulations for the nanoparticles are described.

Antibody variants of parent antibodies are disclosed which have one or more amino acids inserted in a hypervariable region of the parent antibody and a binding affinity for a target antigen which is at least about two fold stronger than the binding affinity of the parent antibody for the antigen.

This invention relates to monovalent and multivalent, monospecific antibodies and to monovalent and multivalent, multispecific antibodies. One embodiment of these antibodies has one or more identical binding sites where each binding site binds with a target antigen or an epitope on a target antigen. Another embodiment of these antibodies has two or more binding sites where these binding sites have affinity towards different epitopes on a target antigen or different target antigens, or have affinity towards a target antigen and a hapten. The present invention further relates to recombinant vectors useful for the expression of these functional antibodies in a host. More specifically, the present invention relates to the tumor-associated antibody designated PAM4. The invention further relates to chimeric PAM4 antibodies, and the use of such antibodies in diagnosis and therapy.

Disclosed are a CH3 domain variant pair of an antibody, a method for preparing same, and a use thereof. A mutation is induced in the CH3 domain so as to improve a yield of forming a heterodimer heavy chain constant region of an antibody. The CH3 domain heterodimer forms a heterodimer heavy chain constant region with a high efficiency of 90 to 95% or more and also has outstanding heat stability. A heterodimer heavy chain constant region including the CH3 domain heterodimer can construct a bispecific monoclonal antibody which simultaneously recognizes two kinds of antigens. The CH3 domain heterodimer and the bispecific antibody or fusion protein of an antibody constant region comprising same can be usefully applied to the treatment or prevention of a disease associated with a target antigen or a target protein.

The present invention is a recombinant vector encoding and expressing at least three or more costimulatory molecules. The recombinant vector may additionally contain a gene encoding one or more target antigens or immunological epitope thereof. The synergistic effect of them costimulatory molecules on the enhanced activation of T cells is demonstrated. The degree of T-cell activation using recombinant vectors containing genes encoding three costimulatory molecules was far greater than the sum of recombinant vector constructs containing one costimulatory molecule and greater that the use of two costimulatory molecules. Results employing the triple costimulatory vectors were most dramatic under conditions of either low levels of first signal or low stimulator to T-cell ratios. This phenomenon was observed with both isolated CD4⁺and CD8⁺T cells. The recombinant vectors of the present invention are useful as immunogenes and vaccines against cancer and pathogenic micro-organisms, and in providing host cells, including dendritic cells and splenocytes with enhanced and antigen-presenting functions.

The present invention includes compositions and methods for increasing the effectiveness of antigen presentation using a DCIR-specific antibody or fragment thereof to which an antigen is attached that forms an antibody-antigen complex, wherein the antigen is processed and presented by a dendritic cell that has been contacted with the antibody-antigen complex.

The present invention relates to rapid clearance molecules that bind target antigens and FcγRIIb with increased affinity as compared to parent molecules, said compositions being capable of causing accelerated clearance of such antigens. Such compositions are useful for treating a variety of disorders, including allergic diseases, atherosclerosis, and a variety of other conditions.

The present invention relates to the field of therapeutic antibodies. The invention especially relates to a method of detecting the target antigen of a therapeutic antibody in a sample comprising the steps of a) providing the sample to be analyzed, b) incubating said sample with said therapeutic antibody under conditions appropriate for binding of said therapeutic antibody to said target antigen, whereby a target antigen-therapeutic antibody-complex is formed, and c) detecting the complex formed in (b).

A redirected Treg cell is endowed with specificity toward a selected target antigen or ligand. The cell contains a chimeric receptor polypeptide that is expressed in a single, continuous chain, with an extracellular recognition region displayed on the surface of the cell, a transmembrane region and an intracellular signaling region. The extracellular recognition region is specific for the selected target antigen or ligand. The intracellular signaling region includes a combination of T-cell signaling polypeptide moieties, which combination, upon binding of the extracellular recognition region to the selected target antigen or ligand, triggers activation of the redirected Treg cells to cause suppression of T-cell mediated immunity. Such redirected Treg cells may be used to suppress undesired activity of T effector cells thereby mediating an immune or inflammatory response. They are particularly useful in treating T effector cell-mediated diseases, such as inflammatory bowel disease, transplant rejection and GVH disease.

The present invention relates to rapid clearance molecules that bind target antigens and FcγRIIb with increased affinity as compared to parent molecules, said compositions being capable of causing accelerated clearance of such antigens. Such compositions are useful for treating a variety of disorders, including allergic diseases, atherosclerosis, and a variety of other conditions.

A piezoelectric cantilever with a non-piezoelectric, or piezoelectric tip useful as mass and viscosity sensors. The change in the cantilever mass can be accurately quantified by monitoring a resonance frequency shift of the cantilever. For bio-detection, antibodies or other specific receptors of target antigens may be immobilized on the cantilever surface, preferably on the non-piezoelectric tip. For chemical detection, high surface-area selective absorbent materials are coated on the cantilever tip. Binding of the target antigens or analytes to the cantilever surface increases the cantilever mass. Detection of target antigens or analytes is achieved by monitoring the cantilever's resonance frequency and determining the resonance frequency shift that is due to the mass of the adsorbed target antigens on the cantilever surface. The use of a piezoelectric unimorph cantilever allows both electrical actuation and electrical sensing. Incorporating a non-piezoelectric tip (14) enhances the sensitivity of the sensor. In addition, the piezoelectric cantilever can withstand damping in highly viscous liquids and can be used as a viscosity sensor in wide viscosity range.

This invention discloses methods and compositions for modulating immune responses, which involve particulate delivery of agents to immune cells, wherein the agents comprise an inhibitor of the NF-kappa B signaling pathway and an antigen that corresponds to a target antigen. The methods and compositions of the present invention are particularly useful in the treatment or prophylaxis of an undesirable immune response associated with the target antigen, including autoimmune diseases, allergies and transplantation associated diseases.

The invention is based in part on the finding that suppressing regulatory T cell function is needed in order to convert passive immunity into active antigen-specific immunity. Generally, the methods of the invention comprise at least the combination of: (1) increasing the amount of immune complexes in the subject, wherein the immune complex comprises a target antigen and a immunoglobulin molecule comprising (i) a variable region specific to the target antigen and (ii) a Fc receptor binding region; and (2) inhibiting regulatory T cell function or decreasing/depleting the regulatory T cell population in the subject.