Anion exchange process for the purification of Factor VIII

Details Anion exchange process for the purification of Factor VIII Anion exchange process for the purification of Factor VIII

1995-11-07

1997-08-19

Schain, Howard E.

Chemistry: natural resins or derivatives; peptides or proteins;

Proteins, i.e., more than 100 amino acid residues

Blood proteins or globulins, e.g., proteoglycans, platelet...

C07K 14755

Patent

active

056590172

ABSTRACT:
A new method for purifying Factor VIII complex from an impure protein fraction, usually cryoprecipitate, is disclosed. The cryoprecipitate is dissolved in a heparin solution. Then Factor VIII complex is initially purified by polyethylene glycol precipitation. The Factor VIII containing supernatant collected after the precipitation is loaded into an anion exchange column that has a quaternary amino ethyl group. The Factor VIII complex is then eluted from the column with a buffer comprising from about 0.14M to about 0.20M CaCl.sub.2. The final step in the purification is to precipitate the Factor VIII complex in the presence of glycine and sodium chloride. The precipitated Factor VIII complex is then reconstituted and stabilized. The reconstituted Factor VIII complex can then be lyophilized and dry heated to obtain a final Factor VIII product.

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