Armour Pharmaceutical Company

Joseph D Fisher

Michael E Hrinda

Chin C Huang

Willie M Curry

This invention relates to a method for producing a plasminogen preparation which has been pasteurized to produce a hepatitis safe injectable plasminogen. The method comprises: adding to an aqueous solution of plasminogen the protective agent of methyl lysine ester, or ethyl lysine ester or a hydrochloride salt thereof which has antifibrinolytic acitivity to thereby attach the agent to plasminogen and form a modified plasminogen; and subjecting the resulting modified agent to a heat treatment of at least 60.degree. C. for at least 10 hours. Further, the protective agent may be separated from the modified plasminogen by affinity chromatography.

Preparation of pasteurized human plasminogen

Antihemophilic factor (AHF), a blood component necessary for clotting of normal whole blood, is extracted from cryoprecipitate containing AHF and fibrinogen as its principal components by: rapidly raising and thereafter lowering the temperature of the cryoprecipitate suspension to selectively denature the fibrinogen in the suspension; and separating the AHF-rich supernatant from the denatured fibrinogen.

Heat defibrinogenation of AHF preparation

Purified plasma albumin is obtained by ion exchange chromatographic procedures and in the absence of process steps involving precipitation or desorption of the albumin.

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Chicago Heights, IL, United States of America

Joseph D Fisher