Protease for activating clotting factor VII

Chemistry: molecular biology and microbiology – Enzyme – proenzyme; compositions thereof; process for... – Hydrolase

Reexamination Certificate

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C435S013000, C435S007100, C514S002600, C514S012200, C514S021800, C530S350000, C530S381000

Reexamination Certificate

active

06911334

ABSTRACT:
A protease for activating the blood clotting factor VII is described, wherein the protease is inhibited by the presence of aprotinin and is increased in its activity by calcium ions and/or heparin or heparin-related substances, and wherein in SDS-PAGE, on subsequent staining in the non-reduced state, the protease has one or more brands in the molecular weight range from 50 to 75 kDa, and in the reduced state, the protease has a band at 40 to 55 kDa and one or more bands in the molecular weight range from 10 to 35 kDa. The proenzyme of this protease is also characterized. Further, a process for obtaining this protease and its use in hemorrhage prophylaxis or hemostasis is described. Moreover, a test system for the qualitative and quantitative detection of a protease which activates the blood clotting factor VII is described.

REFERENCES:
patent: 2 504 921 (1982-05-01), None
patent: WO 91/01497 (1991-02-01), None
patent: WO 96/10638 (1996-04-01), None
Harpel et al. , J. Biol. Chem. 265, 11289-11294 (1990).
Kazama, Yoshiaki et al., “Hepsin, a Putative Membrane-Associated Serine Protease, Activates Human Factor VII and Initiates a Pathway of Blood Coagulation on the Cell Surface Leading to Thrombin Formation,”The Journal of Biological Chemistry,vol. 270 (1), pp. 66-72, (1995).
Choi-Miura, Nam-Ho et al., “Purification and Characterization of a Novel Hyaluronan-Binding Protein (PHBP) From Human Plasma: It has Three EGF, a Kringle and a Serine Protease Domain, Similar to Hepatocyte Growth Factor Activator,”J. Biochem,vol. 119 (6), pp. 1157-1165 (1996).
Laake, K. et al., “Activation of Purified Plasma Factor VII By Human Plasmin, Plasma Kallikrein, And Activated Components of the Human Intrinsic Blood Coagulation System,”Thrombosis Research,vol. 5 (6), pp. 759-772 (1974).
Römisch, J. et al., “A Protease Isolated From Plasma Which Activates FVII in a Tissue Factor Independent Manner But Inactivates FV and FVIII,”Annals of Hematology,vol. 78 (1), pp. 24-27 (1999) (Abstract).
Römisch, J. et al., “The FVII Activating Protease Mediates Fibrinolytic Effects Activating Single-Chain Plasminogen Activators,”Annals of Hematology,vol. 78 (1), pp. 24-27 (1999) (Abstract).
Hunfeld, A. et al., “Identification of the Thrombin-Like Activity of PCCs,”Annals of Hematology,vol. 76 (1), pp. 25-28 (1998) (Abstract).
Choay, SA et al., “Pharmaceutical Complex of Plasmin and Aprotinin—With Long Lasting Fibrinolytic Activity,” Derwent Abstract.
Etscheid et al., 43rdAnnual Meeting of the GTH; Supplement 1 to vol. 78 A42, P030 (1999).
Hunfeld et al., 42ndAnnual Meeting of the GTH; Supplement 1 to vol. 76 A101, P294 (1998).
Hunfeld et al., 41stAnnual Meeting of the GTH; Supplement 1 to vol. 74 A87 P113 (1997).
Römisch et al., 43rdAnnual Meeting of the GTH; Supplement 1 to vol. 78 A24, FV079 (1999).
Römisch et al., 43rdAnnual Meeting of the GTH; Supplement 1 to vol. 78 A10, FV024 (1999).
Choi-Miura et al., J. Biochem, vol. 119, No. 6, P1157-1165 (1996).

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