METHOD OF PURIFYING THERAPEUTIC PROTEINS
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United States of America Patent
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Mar 14, 2013
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Dec 5, 2012
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Abandoned
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Abstract
The present invention relates generally to a method of reducing the level of plasminogen and/or tissue plasminogen activator and/or other protease(s) in a solution comprising fibrinogen and/or Factor VIII and/or von Willebrand factor (VWF), the method comprising: (i) passing a feedstock comprising fibrinogen and/or Factor VIII and/or VWF through a hydrophobic charge-induction chromatographic resin under conditions selected such that the plasminogen and/or tissue plasminogen activator and/or other protease(s) is bound to the resin; and (ii) recovering the solution comprising fibrinogen and/or Factor VIII and/or VWF which passes through the resin; wherein the concentration of the plasminogen and/or tissue plasminogen activator and/or protease(s) in the recovered solution is reduced by at least 50% compared to the feedstock. Also provided are solutions and pharmaceutical formulations comprising the fibrinogen and/or Factor VIII and/or VWF recovered by such methods, and uses thereof.
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