[Evaluation of resistance to activated protein C in myocardial infarction patients].

Abstract:

BACKGROUND:It is known that resistance to activated protein C (APCR), often associated with a single point mutation (Arg506-->Gln) in the coagulation factor V gene (factor V Leiden), is the most frequent inherited abnormality of blood coagulation. It plays a key role as pathogenetic factor of venous thromboembolism, but its association with an increased risk of arterial thrombosis is uncertain. Aim of the present study was to evaluate the prevalence of APCR in men, who suffered myocardial infarction more than 6 months earlier and without cardiovascular risk factors (hypercholesterolemia, smoking, diabetes, obesity and hypertension). METHODS:The study was carried on 20 men aged <65 years who have suffered myocardial infarction. Twenty healthy subjetcs matched for sex and age were recruited as controls. We determined: PTT, PTT-PCA (Activated Protein C), PTT-PCA/PTT, AntiThrombin III, Protein C, Protein S, Fibrinogen, Glucose, Triglycerides, Cholesterol, HDL-C, LDL-C, APO A1, APO B100, Lp(a), oxizided LDL antibody and some components of the complement system (C3c, C4). RESULTS:In the group of patients there were six subjects (30%) with APCR, while there were no subjects in the control group (0%) with APCR. Patients were subdivided into two groups: with and without APCR. Patients with APCR displayed significantly higher levels of fibrinogen (367.5+/-48.4 vs 268.3+/-37.7), LDL-C (147.0 +/-20.7 vs 125.8+/-25,6), APO B100 (133.8+/-29.8 vs 121.8+/-31.5), oxizide LDL antibody (596.8+/-357 vs 315.3+/-179.6) and C4 (45.6+/-10 vs 37.85+/-11,3). Significant positive correlations (p<0.05) were observed between PTT-PCA/PTT ratio and fibrinogen (r=0.68) and between PTT-PCA/PTT ratio and oxidized LDL antibody (r=0.61). CONCLUSIONS:In conclusion, the high prevalence of APCR (30%) in our patients seems to be important in order to carry out a primary prevention of arterial thrombosis and a secondary prevention of new thromboembolic complications.

journal_name

Minerva Cardioangiol

authors

Avellone G,Di Garbo V,Di Raimondo D,Bono M,Abruzzese G,De Simone R,Raneli G

keywords:

subject

Has Abstract

pub_date

2001-12-01 00:00:00

pages

363-8

issue

6

eissn

0026-4725

issn

1827-1618

journal_volume

49

pub_type

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