Partial Purification and Characterization of Urinary Procoagulant

N Aoki; K. N von Kaulla

doi:10.1055/s-0038-1653672

Thrombosis and Haemostasis, Table of Contents

Thromb Haemost 1971; 26(02): 235-250
DOI: 10.1055/s-0038-1653672

Originalarbeiten – Original Articles – Travaux Originaux

Schattauer GmbH

Partial Purification and Characterization of Urinary Procoagulant

N Aoki M. D.

¹Belle Bonfils Memorial Blood Bank and Department of Medicine, University of Colorado Medical Center, 4200 East Ninth Avenue, Denver/Colorado 80220, U.S.A

,

K. N von Kaulla M. D.

¹Belle Bonfils Memorial Blood Bank and Department of Medicine, University of Colorado Medical Center, 4200 East Ninth Avenue, Denver/Colorado 80220, U.S.A

› Author Affiliations

Abstract

Summary

Partial purification of the human urinary procoagulant was achieved and some of its properties characterized. Purification was accomplished by adsorption of urine with BaSO₄, citrate elution, isoelectric precipitation followed by (NH₄)₂SO₄ precipitation and chromatography on hydroxylapatite and Sephadex G-200. Sucrose gradient ultracentrifugation yielded two active components with different sedimentation rates. On electrophoresis the heavier component did not enter the polyacrylamide gel, and the smaller one gave no precipitin band with antihuman serum on immunodiffusion, indicating that the procoagulant does not originate from blood. The purified procoagulant required phospholipids or platelets to activate prothrombin in the presence of coagulation factors V, VII, X and Ca⁺⁺, while the crude procoagulant preparations activated prothrombin to some extent without an addition of phospholipids or platelets. Thus, the purified urinary procoagulant does not act as a typical tissue thromboplastin whereas the crude preparation may contain it as a component or contaminant. Phosphorus-containing material which may be part of a moiety endowing crude procoagulant with tissue thromboplastin-like activity is largely removed by the purification procedure resulting in low levels in the purified procoagulant.

The possible identity (relationship ? ) of urinary procoagulant with the protein component of tissue thromboplastin is discussed.

Full Text

References

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