Abstract
The aim of our study was to compare the effect of simvastatin on a range of hemostatic variables in subjects with impaired fasting glucose (IFG) and isolated hypercholesterolemia. We enrolled 28 subjects with IFG, 25 primary hypercholesterolemic patients and 24 age-, sex- and weight-matched control subjects with normal lipid profile and glucose metabolism. The tested parameters (lipid profile, fasting and 2-h post-glucose load plasma glucose levels, the homeostasis model assessment (HOMA) ratio, glycated hemoglobin, the prothrombin and partial thromboplastin time, plasma fibrinogen, PAI-1 levels and factor VII coagulant activity) were determined at baseline and after 4 and 12 weeks of simvastatin treatment (20mg/daily). Compared to the control subjects, hypercholesterolemic and IFG patients exhibited increased plasma levels of fibrinogen and PAI-1 and increased factor VII activity. PAI-1 was higher in hypercholesterolemic than in IFG patients. Simvastatin improved lipid profile in both groups of patients, but it did not influence glucose metabolism. In both IFG and hypercholesterolemic patients, simvastatin reduced fibrinogen and PAI-1 levels and factor VII activity, and it prolonged the prothrombin and partial thromboplastin time in a lipid- and glucose-independent manner. The main conclusion of our study is that early glucose metabolism abnormalities are associated with disturbed coagulation and fibrinolysis, which contribute to the development and progression of atherosclerosis. Treatment with a lipid lowering agent may bring multidirectional beneficial effects on hemostasis in IFG patients.
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