Thromb Haemost 1959; 03(01): 098-109
DOI: 10.1055/s-0038-1654374
Originalarbeiten — Original Articles — Travaux Originaux
Schattauer GmbH

Some Aspects of Kinetics of the First Stages of Blood Thromboplastin Formation

U Fisch
1   Coagulation Laboratory (Prof. F. Koller) of the Department of Medicine (Prof. P. H. Rossier) University of Zurich, Switzerland
,
F Duckert
1   Coagulation Laboratory (Prof. F. Koller) of the Department of Medicine (Prof. P. H. Rossier) University of Zurich, Switzerland
› Institutsangaben
Weitere Informationen

Publikationsverlauf

Publikationsdatum:
08. Juni 2018 (online)

 

Summary

The first stages of blood thromboplastin generation were investigated. Plasma Thromboplastin Antecedent, Prephase Accelerator, and Hageman factor are involved in the reactions taking place during the lag period. This phase is followed by the formation of intermediate product I. Studying the kinetics of this particular reaction it was possible to attribute to factors VIII and IX the rôle of substrates and to Stuart-Prower factor the rôle of an enzyme. It appears that in haemophilia B serum two distinct factors are lacking, the genuine factor IX, and the prephase accelerator (PPA). An hypothesis explaining tentatively the activation of a precursor to PPA and genuine factor IX is offered.