Abstract: An anti-Epidermal Growth Factor Receptor (EGFR) and anti-Cluster-of-Differentiation (CD3) bispecific antibody and uses thereof are provided. The bispecific antibody can specifically bind to antigen epidermal growth factor receptor (EGFR) on tumor cell surface and antigen CD3 molecule on immune cell surface. The single-chain antibody (ScFv) of an anti-CD3 antibody is located at the C terminal of the constant region of the anti-EGFR antibody. Further provided are a preparation method of the bispecific antibody and clinical applications of the bispecific antibody. The bispecific antibody has high affinity, and is used for treating tumor diseases caused by high expression or abnormal expression of the EGFR and other diseases caused by other overexpression of the EGFR.

Abstract: The application discloses an anti-Proprotein Convertase Subtilisin/Kexin Type 9 (PCSK9) monoclonal antibody, an amino acid sequence comprising coded antibody variable regions and Complementarity-Determining Regions (CDR), the obtaining method, and application of monoclonal antibody. The anti-PCSK9 monoclonal antibodies are screened from a phage antibody library; affinity maturation is achieved by using a method that the phage antibody library is established by means of chain displacement; After screening the light chain CDR1, 2, 3 Mutant Library of monoclonal antibodies obtained from primary screening; monoclonal antibodies having high affinity are selected; then screening the mutant libraries of heavy chain CDR1, 2, 3 regions; and finally the monoclonal antibodies having high affinity are screened.

Abstract: The application discloses an anti-Proprotein Convertase Subtilisin/Kexin Type 9 (PCSK9) monoclonal antibody, an amino acid sequence comprising coded antibody variable regions and Complementarity-Determining Regions (CDR), the obtaining method, and application of monoclonal antibody. The anti-PCSK9 monoclonal antibodies are screened from a phage antibody library; affinity maturation is achieved by using a method that the phage antibody library is established by means of chain displacement; After screening the light chain CDR1, 2, 3 Mutant Library of monoclonal antibodies obtained from primary screening; monoclonal antibodies having high affinity are selected; then screening the mutant libraries of heavy chain CDR1, 2, 3 regions; and finally the monoclonal antibodies having high affinity are screened.

Abstract: An art-Epidermal Growth Factor Receptor (EGFR) and anti-Cluster-of-Differentiation (CD3) bispecific antibody and uses thereof are provided. The bispecific antibody can specifically bind to antigen epidermal growth factor receptor (EGFR) on tumor cell surface and antigen CD3 molecule on immune cell surface. The single-chain antibody (ScFv) of an anti-CD3 antibody is located at the C terminal of the constant region of the anti-EGFR antibody. Further provided are a preparation method of the bispecific antibody and clinical applications of the bispecific antibody. The bispecific antibody has high affinity, and is used for treating tumor diseases caused by high expression or abnormal expression of the EGFR and other diseases caused by other overexpression of the EGFR.