Thrombin generation in plasma: its assessment via the endogenous thrombin potential.
Thrombin generation is a pivotal function of plasma in haemostasis and thrombosis. Its mechanism is essentially the classical cascade, the velocity of which is governed by the availability of factors Va and VIIIa and that is confined to the surface of the procoagulant membranes which appear at the site of injury. There is no routine test that quantitatively renders the thrombin forming capacity of a plasma sample. Clotting times (PT-prothrombin time, APTT-activated partial tromboplastin time) do not reflect the over all thrombin generation and are insensitive to hypercoagulative states. The endogenous thrombin potential (ETP), i.e. the area under the thrombin generation curve, better represents this function. We developed a method to assess the ETP in the routine laboratory. The first results suggest that it is a sensitive indicator for every form of anticoagulation. It is increased in hypercoagulable states thus far studied, both congenital and acquired and can be designed to indicate deficiencies in protein C and S and APC (activated protein C) resistance.
Hemker
H C
HC
Department of Biochemistry, Cardiovascular Research Institute and Medical Faculty, Rijksuniversiteit Limburg, Maastricht, The Netherlands.
Béguin
S
S
D000818:Animals; D001779:Blood Coagulation Factors / Q000378:metabolism; D001780:Blood Coagulation Tests; D001798:Blood Proteins / Q000378:metabolism; D004789:Enzyme Activation; D004790:Enzyme Induction; D005260:Female; D006487:Hemostasis / Q000502:physiology; D006801:Humans; D008297:Male; D011516:Prothrombin / Q000378:metabolism; D051381:Rats; D013917:Thrombin / Q000096:biosynthesis*; D013927:Thrombosis / Q000097:blood
D001779:Blood Coagulation Factors; D001798:Blood Proteins; D011516:Prothrombin; D013917:Thrombin