© 1996 American Heart Association, Inc.
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Visceral Fat Accumulation and Its Relation to Plasma Hemostatic Factors in Healthy Men
From the Institute of Clinical Medicine (M.C., M.T., G.A., G. De S.), the Department of Metabolic Diseases (G.T.), and the Institute of Radiology (I.A.B.A.), University of Verona, Verona, Italy.
Correspondence to Massimo Cigolini, MD, Institute of Clinical Medicine, University of Verona, I-37134 Verona, Italy.
Abstract The associations between abdominal visceral fat and the plasma hemostatic system were examined in 38-year-old healthy men (n=52) with a wide range of fatness and fat distribution. Plasma hemostatic factors and metabolic parameters, including glucose tolerance, were measured, and body fatness and adipose tissue distribution were assessed by using computed tomography. The men with more visceral fat (ie, higher than the median value [n=26]) had a less favorable metabolic profile than the men with less visceral fat (n=26). They also had significantly (P<.05) higher plasma fibrinogen, factor VIII clotting activity, tissue-type plasminogen activator antigen, and plasminogen activator inhibitor–1 (PAI-1) activity (19.2±2.4 versus 8.5±1.6 AU/mL, P<.001) and lower basal tissue-type plasminogen activator activity. After adjustment for plasma insulin, the men with larger abdominal visceral fat area still had significantly higher plasma PAI-1 activity, but no difference was found in any of the other hemostatic factors. In multiple linear regression analysis, abdominal visceral fat area was a positive predictor of plasma PAI-1 activity, but it failed to show any significant association with other hemostatic factors after controlling for plasma insulin. These results suggest the presence of relationships between abdominal visceral fat and several plasma hemostatic factors that are largely mediated by concomitant alterations in plasma insulin concentration. In addition, our results suggest that abdominal accumulation of visceral fat is an independent predictor of plasma PAI-1 activity.
Key Words: visceral fat • insulin • plasminogen activator inhibitor–1 • fibrinogen • hemostatic factors
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