Recombinant bi-functional fusion proteins, preparations and methods for treating disease
First Claim
1. A recombinant bi-functional fusion protein, comprising an Ig-like region of an extracellular domain of a signal-regulatory protein alpha (SIRPα
- ), linked via a linker, to an Ig-like region of an extracellular domain of vascular endothelial growth factor (VEGF) Receptor (VEGFR), wherein the protein can bind to Cluster of Differentiation 47 (CD47) and YEW blocking the binding of CD47 to the SIRP on the cell surface of macrophages to stimulate the phagocytosis of tumor cells by macrophages, and inhibiting the growth of vascular endothelial cells induced by VEGF.
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Accused Products
Abstract
A recombinant bi-functional fusion protein, comprising an Ig region of an extracellular domain of a signal-regulator protein (SIRP), linked via a Fc fragment of an Ig, to an Ig region of an extracellular domain of VEGFR, wherein the protein can bind to CD47 and VEGF simultaneously, blocking the binding of CD47 with the SIRP on the cell surface of macrophages to stimulate the phagocytosis of tumor cells by macrophages, and inhibiting the growth of vascular endothelial cells induced by VEGF. The present application also provides a nucleic acid molecule encoding the recombinant bi-functional fusion protein and an expression vector expressing the protein, a method for producing the protein and a method for treating a disease over-expressing CD47 or VEGF.
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Citations
28 Claims
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1. A recombinant bi-functional fusion protein, comprising an Ig-like region of an extracellular domain of a signal-regulatory protein alpha (SIRPα
- ), linked via a linker, to an Ig-like region of an extracellular domain of vascular endothelial growth factor (VEGF) Receptor (VEGFR), wherein the protein can bind to Cluster of Differentiation 47 (CD47) and YEW blocking the binding of CD47 to the SIRP on the cell surface of macrophages to stimulate the phagocytosis of tumor cells by macrophages, and inhibiting the growth of vascular endothelial cells induced by VEGF.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
Specification