POLYPEPTIDE COMBINATION USED FOR TUMOUR IMMUNOTHERAPY, AND PREPARATION METHOD THEREFOR

• Main Authors: HAN, Lei, ZONG, Huifang, ZHU, Jianwei, WANG, Jing, XIE, Yueqing, JIANG, Hua, CHEN, Junsheng
• Format: Patent
• Language: English; French; German
• Published: 11.10.2023
• Subjects: BEER; BIOCHEMISTRY; CHEMISTRY; COMPOSITIONS THEREOF; CULTURE MEDIA; ENZYMOLOGY; FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIREDCHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERSFROM A RACEMIC MIXTURE; METALLURGY; MICROBIOLOGY; MICROORGANISMS OR ENZYMES; MUTATION OR GENETIC ENGINEERING; ORGANIC CHEMISTRY; PEPTIDES; PROPAGATING, PRESERVING OR MAINTAINING MICROORGANISMS; SPIRITS; VINEGAR; WINE

Provided is a polypeptide combination, a targeting component thereof comprising a shielding peptide, a cleavable part, an antigen-binding part and a first intein fragment, the shielding peptide and the antigen-binding part being connected by means of the cleavable part, and the antigen-binding part being directly or indirectly connected to the first intein fragment; a toxin component thereof comprises a second intein fragment and a toxin, and the second intein fragment is directly or indirectly connected to the toxin; the targeting component and the toxin component form an immunoconjugate by means of the interactive action between the first intein fragment and the second intein fragment; in the immunoconjugate, the shielding peptide and the antigen-binding part are connected by means of the cleavable part, and the antigen-binding part is connected to the toxin. Also provided are a preparation method and a pharmaceutical use for the polypeptide combination.