PHYSIOLOGICALLY ACTIVE POLYPEPTIDE CONJUGATE SHOWING PROLONGED HALF-TIME INDEX IN VIVO Russian patent published in 2007 - IPC C07K19/00 C07K16/46 C07K14/00 C12P21/00 A61K38/00 

FIELD: medicine, genetic engineering.

SUBSTANCE: invention relates to a method for preparing protein conjugates. Method involves adding immunoglobulin or physiologically active polypeptide to a single end of nonpeptide polymer having two reactive terminal groups in the presence of reducing agent. From a prepared reaction mixture the complex containing nonpeptide polymer bound with immunoglobulin or physiologically active polypeptide is isolated. Then free reactive terminal group of nonpeptide polymer of the complex is added covalently to immunoglobulin or physiologically active polypeptide in the presence of reducing agent to obtain a protein conjugate. Protein conjugate containing physiologically active polypeptide bound, nonpeptide polymer and immunoglobulin that are added one to another covalently in indicated order is isolated. Invention provides preparing a protein conjugate useful for manufacturing a polypeptide drug owing to its enhanced stability in vivo, prolonged blood half-time index and decreased immunogenic properties.

EFFECT: valuable medicinal properties of conjugate, improved preparing method.

21 cl, 16 dwg, 14 tbl, 12 ex