316 results about "Immunoglobulin Fc" patented technology

The present invention relates to a single-chain, multiple antigen-binding molecule with diverse variable domains of a heavy and of a light chain of an immunoglobulin, which are connected in the form of a VH-VL construct, which are in turn connected together via a peptide, and to the preparation and use thereof as pharmaceutical or diagnostic aid.

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.

Design and production of immunoglobulin Fc domains including variants to stabilize their monomeric forms are provided.

The present invention relates to a method of reducing the numbers of eosinophils in a human subject comprising administration to a subject an IL-5R binding molecule that comprises (a) a region that specifically binds to the IL-5R and (b) an immunoglobulin Fc region. In a specific embodiment, a method of the invention reduces the number of eosinophils in blood, bone marrow, gastrointestinal tract (e g, esophagus, stomach, small intestine and colon), or lung.

The invention provides compositions and methods for inhibiting fractionation of immunoglobulins comprising a lambda light chain based on the observation that iron, in the presence of histidine, results in increased fragmentation of a recombinant fully human IgG molecule containing a lambda light chain due to cleavage in the hinge region. The invention further provides an aqueous pharmaceutical formulation comprising an antibody, or antigen-binding portion thereof, that binds the p40 subunit of IL-12/IL-23 and a buffer system comprising histidine, wherein the formulation has enhanced stability, including enhanced resistance to fragmentation.

Disclosed are a protein conjugate with improved in vivo duration and stability and the use thereof. The protein conjugate includes a physiologically active polypeptide, a non-peptide polymer and an immunoglobulin Fc fragment. Since the three components are covalently linked, the protein conjugate has extended in vivo duration and enhanced stability for the physiologically active polypeptide. The protein conjugate maintains the in vivo activity at relatively high levels and remarkably increases the serum half-life for the physiologically active polypeptide, with less risk of inducing undesirable immune responses. Thus, the protein conjugate is useful for developing long-acting formulations of various polypeptide drugs.

The current invention involves a series of fully recombinant multimerized forms of immunoglobulin Fc which thereby present polyvalent immunoglobulin Fc to immune cell receptors. The fusion proteins exist as both homodimeric and highly ordered multimeric fractions, termed stradomers. In comparison to the homodimeric fraction, purified multimeric stradomers have higher affinity and avidity for Fc Rs with slower dissociation and are useful in the treatment and prevention of disease. The current invention demonstrates that directly linking IgG1 Fc regions to multimerization domains leads to enhanced multimerization and biological activity.

The present invention relates to a composition for the prevention or treatment of diabetes comprising a long-acting insulin conjugate and a long-acting insulinotropic peptide conjugate, and a therapeutic method for the treatment of diabetes, and more particularly, concurrent administration of the long-acting insulin conjugate and the long-acting insulinotropic peptide conjugate inhibits weight gain caused by insulin treatment, and vomiting and nausea caused by insulinotropic peptide treatment, and reduces the required dose of insulin, thereby remarkably improving drug compliance. Moreover, each of the long-acting insulin conjugate and the long-acting insulinotropic peptide conjugate of the present invention is prepared by linking insulin or insulinotropic peptide with an immunoglobulin Fc region via a non-peptidyl linker, thereby showing improved in-vivo duration of efficacy and stability.

Disclosed are nucleic acid sequences, for example, DNA or RNA sequences, which encode an immunoglobulin Fc-Interferon-alpha fusion protein. The nucleic acid sequences can be inserted into a suitable expression vector and expressed in mammalian cells. Also disclosed is a family of immunoglobulin Fc-Interferon-alpha fusion proteins that can be produced by expression of such nucleic acid sequences. Also disclosed are methods of using such nucleic acid sequences and/or fusion proteins for treating conditions, for example, hepatitis, which are alleviated by the administration of interferon-alpha.

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.

An expression library comprising a repertoire of nucleic acid sequences cloned from a non-immunized source, each nucleic acid sequence encoding at least part of a variable domain of a heavy chain derived from an immunoglobulin naturally devoid of light chains (VHH) wherein the extent of sequence variability in the library is enhanced compared to the corresponding naive expression library by introducing mutations in one or more of the complementarity determining regions (CDRs) of the nucleic acid sequences or by generating alternative combinations of CDR and framework sequences not naturally present in the naive library repertoire. Also disclosed is the use of such a library in preparing antibodies, more particularly antibody fragments.

The present invention relates to an insulinotropic peptide conjugate having improved in-vivo duration of efficacy and stability, comprising an insulinotropic peptide, a non-peptide polymer and a carrier substance, which are covalently linked to each other, and a use of the same. The insulinotropic peptide conjugate of the present invention has the in-vivo activity which is maintained relatively high, and has remarkably increased blood half-life, and thus it can be desirably employed in the development of long acting formulations of various peptide drugs.

Disclosed is a novel use of an immunoglobulin Fc fragment, and more particularly, a pharmaceutical composition comprising an immunoglobulin Fc fragment as a carrier. The pharmaceutical composition comprising an immunoglobulin Fc fragment as a carrier remarkably extends the serum half-life of a drug while maintaining the in vivo activity of the drug at relatively high levels. Also, when the drug is a polypeptide drug, the pharmaceutical composition has less risk of inducing immune responses compared to a fusion protein of the immunoglobulin Fc fragment and a target protein, and is thus useful for developing long-acting formulations of various polypeptide drugs.

The present invention relates to one kind of angiogenesis inhibiting fusion protein and its use. The fusion proteins of the present invention are produced through fusing FLT-1 segment, KDR segment and immunoglobulin Fc segment, and are named as FP1, FP2, FP3, FP4, FP5 and FP6. The amino acid sequences FLT-1 D2, FLT-1 D4, KDR, D1, KDR D3, KDR D4 and FP3 in the immunoglobulin-like area of FLT-1 and KDR are shown in the sequence lists 1-6, and FP3 coded DNA sequence is shown in the sequence list 7.

The invention relates to a method for manufacturing a recombinant polyclonal protein composition, in particular a recombinant polyclonal antibody composition. The method comprises obtaining a collection of cells transfected with a library of variant nucleic acid sequences, wherein each cell in the collection is transfected with and capable of expressing one member of the library, which encodes a distinct member of a polyclonal protein that binds a particular antigen and which is located at the same single site in the genome of individual cells in said collection, wherein said nucleic acid sequence is not naturally associated with said cell in the collection. The cells are cultured under suitable conditions for expression of the polyclonal protein, which is obtained from the cells or culture supernatant. The nucleic acid sequence id introduced into the cells by transfection with a library of vectors for site-specific integration. The present method is suitable for manufacturing recombinant polyclonal antibodies, thereby mailing available a superior replacement of plasma-derived therapeutic immunoglobulin products.

CTLA4-immunoglobulin fusion proteins having modified immunoglobulin constant region-mediated effector functions, and nucleic acids encoding the fusion proteins, are described. The CTLA4-immunoglobulin fusion proteins comprise two components: a first peptide having a CTLA4 activity and a second peptide comprising an immunoglobulin constant region which is modified to reduce at least one constant region-mediated biological effector function relative to a CTLA4-IgG1 fusion protein. The nucleic acids of the invention can be integrated into various expression vectors, which in turn can direct the synthesis of the corresponding proteins in a variety of hosts, particularly eukaryotic cells. The CTLA4-immunoglobulin fusion proteins described herein can be administered to a subject to inhibit an interaction between a CTLA4 ligand (e.g., B7-1 and/or B7-2) on an antigen presenting cell and a receptor for the CTLA4 ligand (e.g. CD28 and/or CTLA4) on the surface of T cells to thereby suppress an immune response in the subject, for example to inhibit transplantation rejection graft versus host disease or autoimmune responses.

The invention relates to binding proteins or polypeptides of a member of the immunoglobulin superfamily, specifically relates to an anti-human B7-H3 monoclonal antibodies 4H7 and 21D4, a preparation method of the monoclonal antibodies, and the applications of the monoclonal antibodies in tumor (gastric cancer) prognostic evaluation and in being used as a marked molecule for identification of human dendritic cells (DC).