Abstract: The invention pertains to a recombinant polypeptide comprising a truncated von Willebrand Factor (VWF) for use in the treatment or prophylaxis of a blood coagulation disorder, said treatment or prophylaxis comprising administering the recombinant polypeptide and a Factor VIII protein (FVIII) extravascular to a subject having a blood coagulation disorder, wherein said recombinant polypeptide is capable of binding to said FVIII, and wherein the molar ratio of the recombinant polypeptide to be administered to the FVIII to be administered is higher than 50.

Abstract: A process for purifying a recombinant protein comprising the steps of: i) providing a solution comprising the recombinant protein; ii) adding an alkyl glycoside to the solution; and iii) purifying the recombinant protein. The addition of the alkyl glycoside provides improved clearance of process-related impurities. The purified recombinant protein of the invention has low levels of host cell DNA, host cell protein and viral contamination.

Abstract: The present invention relates to a recombinant polypeptide comprising a truncated von Willebrand Factor (VWF) capable of binding to blood coagulation Factor VIII (FVIII) for use in reducing the immunogenicity of Factor VIII (FVIII) wherein said recombinant polypeptide and a blood coagulation Factor VIII (FVIII) protein are co-administered to a subject suffering from a 10 blood coagulation disorder. The invention further relates to pharmaceutical compositions and kits for said use.

Abstract: The present invention provides a modified polypeptide which binds Factor VIII. The modified polypeptide comprises a sequence as shown in SEQ ID NO:3 in which the sequence comprises at least a modification at position 1 or 3 such that the modified polypeptide binds to Factor VIII with an off rate at least 5 fold lower than a reference polypeptide comprising an unmodified SEQ ID NO:3.