Effects of free fatty acids on glucose uptake and utilization in healthy women

被引:56
|
作者
Homko, CJ
Cheung, P
Boden, G
机构
[1] Temple Univ, Sch Med, Div Endocrinol Diabet Metab, Philadelphia, PA 19122 USA
[2] Temple Univ, Sch Med, Gen Clin Res Ctr, Philadelphia, PA 19122 USA
关键词
D O I
10.2337/diabetes.52.2.487
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
To study effects of sex on free fatty acid (FFA)-induced insulin resistance, we have examined the effects of acute elevations of plasma FFA levels on insulin-stimulated total body glucose uptake in nine healthy young women. Euglycemic-hyperinsulinemic (similar to500 pmol/l) clamps were performed for 4 It with coinfusion of either lipid/heparin (L/H) to acutely raise plasma FFA levels (from similar to600 to similar to1,200 mumol/l) or saline/glycerol to lower fatty acids (from similar to600 to similar to50 mumol/l). L/H infusion inhibited insulin-stimulated glucose uptake (determined with [3(-3)H]glucose) and glycogen synthesis by 31 and 40%, respectively (P < 0.01), almost completely abolished insulin suppression of endogenous glucose production (EGP) (13.6 vs. 10.0 mumol (.) kg(-1) . min(-1), NS), prevented the insulin induced increase in carbohydrate oxidation (8.1 vs. 7.4 mumol (.) kg(-1) (.) min(-1), NS), and stimulated fat oxidation (from 3.6 to 5.1 mumol (.) kg(-1) min(-1), P < 0.01). These data showed that acute increases in plasma FFA levels inhibited the actions of insulin on glucose uptake, glycogen synthesis, and EGP in women to a degree similar to that previously reported in men. We conclude that at insulin and FFA levels in the postprandial range, women and men were susceptible to FFA-induced peripheral and hepatic insulin resistance.
引用
收藏
页码:487 / 491
页数:5
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