| abstract |
The invention concerns a process for extracting high-purity von Willebrand factor wherein recombinant von Willebrand factor (rvWF) is chromatographically purified by anion exchange chromatography on a quaternary amino-type anion exchanger in a buffer solution comprising buffer substances and optionally salt. The buffer solutions are preferably free from stabilizers, amino acids and other additives. This process produces high-purity recombinant vWF which is free from blood plasma proteins, in particular factor VIII, and is physiologically active. The invention further concerns a pharmaceutical preparation which contains rvWF and is composed of multimers having high structural integrity. |