141 results about "Fc(alpha) receptor" patented technology

The provided scaffolds have heavy chains that are asymmetric in the various domains (e.g. CH2 and CH3) to accomplish selectivity between the various Fc receptors involved in modulating effector function, beyond those achievable with a natural homodimeric (symmetric) Fc molecule, and increased stability and purity of the resulting variant Fc heterodimers. These novel molecules comprise complexes of heterogeneous components designed to alter the natural way antibodies behave and that find use in therapeutics.

The provided scaffolds have heavy chains that are asymmetric in the various domains (e.g. CH2 and CH3) to accomplish selectivity between the various Fc receptors involved in modulating effector function, beyond those achievable with a natural homodimeric (symmetric) Fc molecule, and increased stability and purity of the resulting variant Fc heterodimers. These novel molecules comprise complexes of heterogeneous components designed to alter the natural way antibodies behave and that find use in therapeutics.

The present invention provides antibodies that bind to the T-cell co-inhibitor programmed death-1 (PD-1) protein, and methods of use. In various embodiments of the invention, the antibodies are fully human antibodies that bind to PD-1. In certain embodiments, the present invention provides multi-specific antigen-binding molecules comprising a first binding specificity that binds to PD-1 and a second binding specificity that binds to an autoimmune tissue antigen, another T-cell co-inhibitor, an Fc receptor, or a T-cell receptor. In some embodiments, the antibodies of the invention are useful for inhibiting or neutralizing PD-1 activity, thus providing a means of treating a disease or disorder such as cancer or a chronic viral infection. In other embodiments, the antibodies are useful for enhancing or stimulating PD-1 activity, thus providing a means of treating, for example, an autoimmune disease or disorder.

The present invention relates to Fc variants with optimized Fc receptor binding properties, methods for their generation, Fc polypeptides comprising Fc variants with optimized Fc receptor binding properties, and methods for using Fc variants with optimized Fc receptor binding properties.

Antibodies, antigen-binding proteins and Fc-fusion proteins that comprise recombinant polypeptides containing a chimeric heavy chain constant region sequence are provided that bind to certain Fc receptors however have reduced effector functions. Methods of making constructs for expression of such chimeric Fc-containing antibodies, antigen-binding proteins and Fc-fusion proteins in cell systems, and methods of producing and isolating the chimeric Fc-containing proteins are provided.

The present invention relates to Fc polypeptides with novel Fc receptor binding sites, and their application, particularly for therapeutic purposes.

IVIG replacement compounds are derived from recombinant and/or biochemical creation of immunologically active biomimetic(s). These replacement compounds are then screened in vitro to assess each replacements compound's efficiency at modulating immune function. Particular replacement compounds are selected for further in vivo validation and dosage/administration optimization. Finally, the replacement compounds are used to treat a wide range of diseases, including inflammatory and autoimmune diseases.

The present invention relates to humanized FcγRIIB antibodies, fragments, and variants thereof that bind human FcγRIIB with a greater affinity than said antibody binds FcγRIIA. The invention encompasses the use of the humanized antibodies of the invention for the treatment of any disease related to loss of balance of Fc receptor mediated signaling, such as cancer, autoimmune and inflammatory disease. The invention provides methods of enhancing the therapeutic effect of therapeutic antibodies by administering the humanized antibodies of the invention to enhance the effector function of the therapeutic antibodies. The invention also provides methods of enhancing the efficacy of a vaccine composition by administering the humanized antibodies of the invention. The invention encompasses methods for treating an autoimmune disease and methods for elimination of cancer cells that express FcγRIIB.

Disclosed herein are methods and compositions for enhancing the immunogenicity of a preselected protein or peptide antigen in a mammal. Immunogenicity is enhanced by fusing the preselected antigen to an immunoglobulin heavy chain constant region to produce an Fc-antigen fusion protein. The Fc-antigen fusion proteins bind Fc receptors on the surface of antigen presenting cells, thereby targeting the antigen to the antigen presenting cells in the mammal. In addition, disclosed is a family of adjuvants, for example, an Fc-adjuvant fusion protein, for use in combination with the Fc-antigen fusion proteins to enhance or modulate a particular immune response against the preselected antigen.

The present invention relates to humanized FcγRIIB antibodies, fragments, and variants thereof that bind human FcγRIIB with a greater affinity than said antibody binds FcγRIIA. The invention encompasses the use of the humanized antibodies of the invention for the treatment of any disease related to loss of balance of Fc receptor mediated signaling, such as cancer, autoimmune and inflammatory disease. The invention provides methods of enhancing the therapeutic effect of therapeutic antibodies by administering the humanized antibodies of the invention to enhance the effector function of the therapeutic antibodies. The invention also provides methods of enhancing the efficacy of a vaccine composition by administering the humanized antibodies of the invention. The invention encompasses methods for treating an autoimmune disease and methods for elimination of cancer cells that express FcγRIIB.

Rationally designed antibodies and polypeptides that comprise multiple Fc region amino acid substitutions that synergistically provide enhanced selectivity and binding affinity to a target Fc receptor are provided. The polypeptides are mutated at multiple positions to make them more effective when incorporated in antibody therapeutics than those having wild-type Fc components.

The invention provides a natural killer cell, NK-92, modified to express an Fc receptor on the surface of the cell, such as CD16 (FcγRIII-A), or other Fcγ or Fc receptors. The modified NK-92 cell can be further modified to concurrently express an associated accessory signaling protein, such as FcεRI-γ, TCR-ζ, or to concurrently express interleukin-2 (IL-2) or other cytokines. Additional methods are disclosed for various assays, assessments, and therapeutic treatments with the modified NK-92 cells.

Disclosed are methods for the genetic construction and expression of antibody-based fusion proteins with enhanced circulating half-lives. The fusion proteins of the present invention lack the ability to bind to immunoglobulin Fc receptors, either as a consequence of the antibody isotype used for fusion protein construction, or through directed mutagenesis of antibody isotypes that normally bind Fc receptors. The fusion proteins of the present invention may also contain a functional domain capable of binding an immunoglobulin protection receptor.

The present disclosure relates to a novel class of anti-CD20 monoclonal antibodies comprising a homogeneous population of anti-CD20 IgG molecules having the same N-glycan on each of Fc. The antibodies of the invention can be produced from anti-CD20 monoclonal antibodies by Fc glycoengineering. Importantly, the antibodies of the invention have improved therapeutic values with increased ADCC activity and increased Fc receptor binding affinity compared to the corresponding monoclonal antibodies that have not been glycoengineered.

A disease characterized by amyloid aggregation in a patient may be prevented or treated by causing antibodies against a peptide component of the amyloid deposit to come into contact with the aggregated or soluble amyloid. In order to decrease the risk of inflammation in such a method, the Fc receptors of the patient are blocked, preferably by administration of an effective amount of IVIg, prior to the procedure of causing the antibodies to come into contact with the amyloid.

This invention relates to whole antibodies of neutral isotype having specificity for E-selectin, process for their preparation (using vectors), pharmaceutical compositions containing them, and their use in therapy and diagnosis. Said antibodies are variants of natural antibodies altered in the Fc region, especially in the CH2 domain, so that the interactions with antibodies Fc receptors and complement are very low.

The present invention relates to a method for the production and the selection of human or chimaeric or humanized antibodies or molecules that comprise the Fc region of human IgG, capable of modulating the activity of one or several particular Fc receptors, such as the triggering of inhibitory functions through the human type IIB receptors of IgG (FcgammaRIIB/CD32).

The present disclosure provides a method for enhancing the anti-tumor efficacy of an Fc fusion protein which binds specifically to a target, e.g., a co-inhibitory or co-stimulatory receptor of ligand, on a T cell in a subject afflicted with a cancer or a disease caused by an infectious agent and alters the activity of the immunomodulatory target, thereby potentiating an endogenous immune response against cells of the cancer or the infectious agent, wherein the method comprises selecting, designing or modifying the Fc region of the Fc fusion protein so as to enhance the binding of said Fc region to an activating Fc receptor (FcR). The disclosure also provides an Fc fusion protein produced by said method which has an enhanced ability to potentiate an endogenous immune response against cells of a cancer or an infectious agent in a subject. The disclosure further provides a method for treating a subject which comprises administering to the subject a therapeutically effective amount of an Fc fusion protein, wherein the Fc region of the Fc fusion protein has been selected, designed or modified so as to increase the binding of said Fc region to an activating FcR.