Haematologica, Vol 91, Issue 3, 431-432
Copyright © 2006 by Ferrata Storti Foundation
Prothrombin Suresnes: a case of homozygous F299V mutation responsible for hypodysprothrombinemia
D Francois,
C Chevreaud,
D Vignon,
and
P de Mazancourt
A patient with a severe prothrombin deficiency and a hemorrhagic diathesis was found to have positive cross-reactive material in plasma and a homozygous F299V mutation (F7V in the A chain). This mutation reinforces the previous conclusion that the A chain affects the geometry of the catalytic triad. Marked prolongation of the Taipan venom and Russell venom clotting times also demonstrated a defective activation mechanism and a defective interaction with factor Xa.