ApoC-III and visceral adipose tissue contribute to paradoxically normal triglyceride levels in insulin-resistant African-American women.

ApoC-III and visceral adipose tissue contribute to paradoxically normal triglyceride levels in insulin-resistant African-American women.
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DOI:
10.1186/1743-7075-10-73
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发表时间:
2013-12-23
影响因子:
4.5
通讯作者:
Sacks FM
Sacks FM
中科院分区:
医学3区
文献类型:
--
作者:
Sumner AE;Furtado JD;Courville AB;Ricks M;Younger-Coleman N;Tulloch-Reid MK;Sacks FM

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非洲裔美国人比白人更耐胰岛素,但甘油三酯(TG)浓度较低。这一现象的代谢基础尚不清楚。我们的目标是在一项横断面研究中确定胰岛素抵抗、内脏脂肪组织(VAT)和载脂蛋白B、C-III和E对极低密度脂蛋白(VLDL)甘油三酯含量的种族差异的影响。31名女性(16名非裔美国人,15名白人)年龄相近(37 ± 9比38 ± 11Y(平均 ± SD),P= 0.72),体重指数(32.4 ± 7.2比29.3 ± 6.0g/m2,P= 0.21)。给予标准饮食(33%脂肪、52%碳水化合物、15%蛋白质),连续7天,然后在第8天进食试验餐(40%脂肪、40%碳水化合物、20%蛋白质)。根据最小模型计算胰岛素敏感指数(SI)。增值税在L2-3测量。用随机效应模型(REM)分析RACE、SI、VAT和载脂蛋白对极低密度脂蛋白甘油三酯含量的影响。非洲裔美国人的胰岛素抵抗程度更高(SI:3.6 ± 1.3vs.5.6 ± 2.6mU/L-1.min-1,P< 0.01),增值税更低(75 ± 59vs.102 ± 71 mm2,P< 0.01)。轻密度极低密度脂蛋白中的甘油三酯、载脂蛋白B和载脂蛋白C-Ⅲ含量在非裔美国人中较低(除载脂蛋白C-Ⅲ外,其余P< 均为0.05,P= 0.11)。载脂蛋白E的含量不因种族而异。在快速眼动阶段,VAT影响极低密度脂蛋白的甘油三酯浓度,而SI对其无影响。在有RACE、SI、VAT和所有载脂蛋白进入的模型中,RACE并不显著,但apoC-III和VAT仍然是轻和密集极低密度脂蛋白中甘油三酯浓度的显著决定因素。非裔美国人低浓度的载脂蛋白C-III和增值税导致了甘油三酯浓度的种族差异。ClinicalTrials.gov标识:NCT00484861
African-Americans are more insulin-resistant than whites but have lower triglyceride (TG) concentrations. The metabolic basis for this is unknown. Our goal was to determine in a cross-sectional study the effect of insulin resistance, visceral adipose tissue (VAT) and the apolipoproteins, B, C-III and E, on race differences in TG content of very low density lipoproteins (VLDL). The participants were 31 women (16 African-American, 15 white) of similar age (37 ± 9 vs. 38 ± 11y (mean ± SD), P = 0.72) and BMI (32.4 ± 7.2 vs. 29.3 ± 6.0 kg/m2, P = 0.21). A standard diet (33% fat, 52% carbohydrate, 15% protein) was given for 7 days followed by a test meal (40% fat, 40% carbohydrate, 20% protein) on Day 8. Insulin sensitivity index (SI) was calculated from the minimal model. VAT was measured at L2-3. The influence of race, SI, VAT and apolipoproteins on the TG content of VLDL was determined by random effects models (REM). African-Americans were more insulin-resistant (SI: 3.6 ± 1.3 vs. 5.6 ± 2.6 mU/L-1.min-1, P < 0.01) with less VAT (75 ± 59 vs. 102 ± 71 cm2, P < 0.01). TG, apoB and apoC-III content of light and dense VLDL were lower in African-Americans (all P < 0.05 except for apoC-III in light VLDL, P = 0.11). ApoE content did not vary by race. In REM, VAT but not SI influenced the TG concentration of VLDL. In models with race, SI, VAT and all apolipoproteins entered, race was not significant but apoC-III and VAT remained significant determinants of TG concentration in light and dense VLDL. Low concentrations of apoC-III and VAT in African-Americans contribute to race differences in TG concentrations. ClinicalTrials.gov Identifier: NCT00484861
DOI: 10.1089/152091503322641060
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Boston, Ray C;Stefanovski, Darko;Bergman, Richard N
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