PROCESS FOR PURIFYING FACTOR VIII

摘要

PCT No. PCT/SE95/01351 Sec. 371 Date May 30, 1997 Sec. 102(e) Date May 30, 1997 PCT Filed Nov. 14, 1995 PCT Pub. No. WO96/15150 PCT Pub. Date May 23, 1996A process for reducing degradation of recombinant coagulation factor VIII caused by metal-dependent proteases requiring Zn2+ for activity or containing Zn2+ as an integral part of their structure comprises adding an inhibitor of Zn2+ dependent proteases to a recombinant factor VIII solution. The recombinant factor VIII solution is obtained after harvesting a conditioned medium from a cell culture used for producing the recombinant coagulation factor VIII. The inhibitor is selected from complexing agents with a stronger affinity for the Zn2+ ion of the protease than for the ion or ions stabilizing the factor VIII molecule, and compounds structurally related to the natural substrate of the protease and containing an electronegative moiety.