Arteriosclerosis, Thrombosis, and Vascular Biology. 1999;19:2448-2455
© 1999 American Heart Association, Inc.
Atherosclerosis and Lipoproteins |
Gender Difference in Postprandial Lipemia
Importance of Visceral Adipose Tissue Accumulation
Abstract—Insulin resistance, hyperinsulinemia, hypertriglyceridemia, and low HDL-cholesterol concentrations are common features of a plurimetabolic syndrome, which increases the risk of coronary artery disease. Although it has been proposed that the development of atherosclerosis through alterations in plasma lipid levels could be a postprandial phenomenon, most studies on gender differences in plasma lipoprotein-lipid concentrations have reported fasting levels. Therefore, the aim of our study was to examine the response of postprandial triglyceride-rich lipoproteins to a standardized meal in 63 men and 25 women. In addition to the measurement of fasting and postprandial plasma lipid levels, numerous physical and metabolic variables were assessed, including body composition by underwater weighing and body fat distribution by computed tomography. Although no gender difference was noted in total body fat mass, men were characterized by a preferential accumulation of abdominal adipose tissue as revealed by an increased waist circumference and a greater visceral adipose tissue accumulation (50% difference) compared with women (P<0.001). Men also showed a greater plasma triglyceride response (P<0.005) as well as increased postprandial insulin and free fatty acid levels compared with women (P<0.01). Visceral adipose tissue was significantly associated with the postprandial triglyceride response in both genders (men: r=0.49, P<0.0001; women: r=0.43, P<0.05). Finally, when men and women were matched for visceral adipose tissue accumulation, the gender difference in postprandial plasma triglyceride response was eliminated. Thus results of the present study suggest that the well known gender difference in visceral adipose tissue accumulation is an important contributing factor involved in the exaggerated postprandial triglyceride-rich lipoprotein response noted in men compared with women.
Key Words: postprandial lipemia • gender differences • visceral obesity • free fatty acids
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