A poor anticoagulant response to activated protein C (APC r&stance) induced hy the ArglGln8g8 mutation of the Factor V gene is, in ssversl countries, the most oommon genetic defect sssootatsd with thmmbophilic disorders. Frequencies of APC resistance between 2050% have teen observed in pstients with deep venous thrombosis, SugQedinQ the importance of the Pmtein C System acttvity. Also, in other...

A poor anticoagulant response to activated protein C (APC r&stance) induced hy the ArglGln8g8 mutation of the Factor V gene is, in ssversl countries, the most oommon genetic defect sssootatsd with thmmbophilic disorders. Frequencies of APC resistance between 2050% have teen observed in pstients with deep venous thrombosis, SugQedinQ the importance of the Pmtein C System acttvity. Also, in other...

A new factor V mutation associated with resistance to activated protein C and thrombosis (factor V Cambridge, Arg306-->Thr) was found in one patient from a carefully selected group of 17 patients with venous thrombosis and confirmed APC resistance in the absence of the common Gln506 mutation. The Arg306 mutation was also present in a first degree relative who also had APC resistance. Other pote...

A common mutation in the factor V gene, the Leiden mutation, is the most frequent genetic cause of resistance to activated protein C (APC). Recent studies have shown that the prevalence of APC resistance is associated with severe pregnancy-induced hypertension (PIH). Our objective was to determine whether the factor V Leiden mutation is more prevalent in patients who developed severe PIH than i...

OBJECTIVE The aim of our study was to determine the frequency of resistance to activated protein C (APC), factor V Leiden (FVL) and the prothrombin G20210A variant in patients with colorectal cancer. METHODS 74 patients with colorectal cancer and 192 colonoscopically selected controls were prospectively investigated for the presence of APC resistance, FVL and the prothrombin G20210A variant. ...

OBJECTIVE To confirm the relationship between resistance to activated protein C (APC), factor V Leiden, and central retinal vein occlusion in young adults as reported in a recent study of patients younger than 50 years. PATIENTS AND METHODS Patients younger than 50 years with central retinal vein occlusion were identified from the medical records of the Wills Eye Hospital Retina and Retina Va...

Gln=-factor V (W) was purified from plasma of an individual homozygous for an Arg506Gln mutation in FV that is associated with activated protein C (APC) resistance. Purified GlnW-FV, as well as Glnm-FVa generated by either th ombin or FXa, conveyed APC resistance to FV-deficient plasma in coagulation assays. Clotting assay studies also suggested that APC resistance does not involve any abnorm...

OBJECTIVE Activated protein C (APC) resistance not related to the factor V Leiden mutation is a risk factor for venous thrombosis. Oral estrogen replacement therapy (ERT) has been reported to induce APC resistance. Little is known about the effect of transdermal estrogen. METHODS AND RESULTS We enrolled 196 postmenopausal women who were randomly allocated to receive either 1 mg 17beta-estradi...