Bispecific recombinant protein and use thereof

Provided is a bispecific recombinant protein, comprising a high affinity tumor-targeting arm and a low affinity fusion protein blocking the interaction of CD47 with SIRPα. The antibody corresponding to the high affinity tumor-targeting arm does not bind to CD47, and its binding affinity to the targe...

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Bibliographische Detailangaben
Hauptverfasser:	Long, Kai, Song, Liping, Wang, Jian, Cui, Xiaotian, She, Yisha, Zhang, Ganliang, Li, Tao, Xu, Hong, Wu, Haixiang, Jia, Jiana, Fan, Yi
Format:	Patent
Sprache:	eng
Schlagworte:	AGRICULTURE ANIMAL HUSBANDRY BEER BIOCHEMISTRY CARE OF BIRDS, FISHES, INSECTS CHEMISTRY COMPOSITIONS THEREOF CULTURE MEDIA ENZYMOLOGY FISHING FORESTRY HUMAN NECESSITIES HUNTING HYGIENE MEDICAL OR VETERINARY SCIENCE METALLURGY MICROBIOLOGY MICROORGANISMS OR ENZYMES MUTATION OR GENETIC ENGINEERING NEW BREEDS OF ANIMALS ORGANIC CHEMISTRY PEPTIDES PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES PROPAGATING, PRESERVING OR MAINTAINING MICROORGANISMS REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS ORMEDICINAL PREPARATIONS SPIRITS TRAPPING VINEGAR WINE
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Beschreibung
Zusammenfassung:	Provided is a bispecific recombinant protein, comprising a high affinity tumor-targeting arm and a low affinity fusion protein blocking the interaction of CD47 with SIRPα. The antibody corresponding to the high affinity tumor-targeting arm does not bind to CD47, and its binding affinity to the target antigen on the tumor cell is at least 6 times as great as the binding affinity of monomer fusion protein homodimer corresponding to the low affinity fusion protein blocking the interaction of CD47 with SIRPα, to a CD47 on the tumor cell, wherein the low affinity fusion protein blocking the interaction of CD47 with SIRPα comprises a SIRPα extracellular truncation. Also provided are nucleic acid molecules encoding recombinant proteins and the use of the recombinant proteins and nucleic acid molecules in the manufacture of a medicament for treating tumors.