33 results about "ERBB2 Antibody" patented technology

The invention belongs to a biomedical technology field. The invention provides an anti-human ErbB2 antibody and ansamitocin conjugate, comprising: substituting lysine at 30 or/and 65 position in a heavy chain variable region of Trastuzumab with a hydrophilic amino acid, and then coupling with ansamitocin (DM1). On basis of maintaining coupling Pharmaceutical activity, a proportion of ansamitocin in a coupling medicament is reduced, thereby reducing toxic and side effect of the coupling medicament. The invention further provides applications of the anti-human ErbB2 antibody and ansamitocin conjugate for preparing antitumor drugs.

An erbB2 antibody is provided that binds preferentially to disease cells having an erbB2 density greater than a normal erbB2 density. The erbB2 antibody comprises a heavy chain and a light chain. Each chain has a constant region and a variable region. Each variable region comprises framework regions and complementarity determining regions (CDRs), wherein the CDRs have an amino acid sequence set forth below: For the heavy chain: CDR1 GFNIKDTYIH (SEQ ID No. 1) CDR2 RIYPTNGY⁵⁷TR⁵⁹ YADSVKG (SEQ ID No. 2) CDR3 WGGDGFYAMDY (SEQ ID No. 3) For the light chain: CDR1 RASQDVN³⁰TAVA (SEQ ID No. 4) CDR2 SASF⁵³LYS (SEQ ID No. 5) CDR3 QQHY⁹²TTPPT (SEQ ID No. 6). At least one of Y57, R59, N30, F53, and Y92 is substituted by an amino acid that confers on said antibody a reduced erbB2 binding affinity (Kd) that is in the range from 0.1 nM to 100 nM. The substitution is other than N30A, F53N, Y92A and Y92F when there is a single substitution in the antibody light chain.

The present invention relates to antibodies including human antibodies and antigen-binding portions thereof that specifically bind to ErbB2, preferably human ErbB2. In another embodiment, the antibodies or antigen-binding portions thereof inhibit ErbB2. The invention also relates to antibodies that are chimeric, bispecific, derivatized, single chain antibodies or portions of fusion proteins. The invention also relates to isolated heavy and light chain immunoglobulins or portions thereof derived from human anti-ErbB2 antibodies and nucleic acid molecules encoding such immunoglobulins. The present invention also relates to methods of using the antibodies and compositions for diagnosis and treatment. The invention also provides gene therapy methods using nucleic acid molecules encoding the heavy and/or light immunoglobulin molecules that comprise the human anti-ErbB2 antibodies. The invention also relates to transgenic animals or plants comprising nucleic acid molecules of the present invention.

The present invention concerns the treatment of disorders characterized by the overexpression of ErbB2. More specifically, the invention concerns the treatment of human patients susceptible to or diagnosed with cancer overexpressing ErbB2 with anti-ErbB2 antibody.

The invention discloses an ErbB2 antigen epitope peptide bonded with an E9 antibody. The ErbB2 antigen epitope peptide disclosed by the invention is an antigen epitope peptide respectively named as A1and/or B1, wherein A1 contains amino acid residues as follows: Arg at a site 136 of a sequence 6 in a sequence table, Pro at a site 138, Cys at a site 141, Tyr at a site 142 and Asp at a site 144; and B2 contains amino acid residues as follows: Asn at a site 141 of the sequence 6 in the sequence table, Arg at a site 167, Cys at a site 171, His at a site 172 and Glu at a site 186. Compared with abonding region between chA21 and ErbB2, an ErbB2 antibody, antigen epitope peptide bonded with the ErbB2 antibody and antigen epitope have the advantages that the bonding sequences between E9 and ErbB2 are reduced, and the preparation of new ErbB2 antibody is promoted.

The invention relates to a combined application of ErbB2 antibody and Saracatinib in preparation of a medicine for treating the breast cancer. The ErbB2 antibody and the Saracatinib have the effect ofsynergistically inhibiting growth of ErbB2 positive tumors when being combined for use, thereby having a wide application prospect.