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Substrate utilization and metabolic profile in response to overfeeding with a high-fat diet in South Asian and white men: a sedentary lifestyle study

南亚和白人男性对高脂饮食过度喂养的底物利用和代谢特征: 一项久坐的生活方式研究

  • 影响因子:4.82
  • DOI:10.1038/s41366-019-0368-2
  • 作者列表:"Wulan, Siti N.","Schrauwen-Hinderling, Vera B.","Westerterp, Klaas R.","Plasqui, Guy
  • 发表时间:2020-01-01
Abstract

Background For the same BMI, South Asians have a higher body fat percentage, a higher liver fat content and a more adverse metabolic profile than whites. South Asians may have a lower fat oxidation than whites, which could result in an unfavorable metabolic profile when exposed to increased high-fat foods consumption and decreased physical activity as in current modern lifestyle. Objective To determine substrate partitioning, liver fat accumulation and metabolic profile in South Asian and white men in response to overfeeding with high-fat diet under sedentary conditions in a respiration chamber. Design Ten South Asian men (BMI, 18–29 kg/m^2) and 10 white men (BMI, 22–33 kg/m^2), matched for body fat percentage, aged 20–40 year were included. A weight maintenance diet (30% fat, 55% carbohydrate, and 15% protein) was given for 3 days. Thereafter, a baseline measurement of liver fat content (1H-MRS) and blood parameters was performed. Subsequently, subjects were overfed (150% energy requirement) with a high-fat diet (60% fat, 25% carbohydrate, and 15% protein) over 3 consecutive days while staying in a respiration chamber mimicking a sedentary lifestyle. Energy expenditure and substrate use were measured for 3 × 24-h. Liver fat and blood parameters were measured again after the subjects left the chamber. Results The 24-h fat oxidation as a percentage of total energy expenditure did not differ between ethnicities ( P  = 0.30). Overfeeding increased liver fat content ( P  = 0.02), but the increase did not differ between ethnicities ( P  = 0.64). In South Asians, overfeeding tended to increase LDL-cholesterol ( P  = 0.08), tended to decrease glucose clearance ( P  = 0.06) and tended to elevate insulin response ( P  = 0.07) slightly more than whites. Conclusions Despite a similar substrate partitioning and similar accretion of liver fat, overfeeding with high-fat under sedentary conditions tended to have more adverse effects on the lipid profile and insulin sensitivity in South Asians.

摘要

背景对于相同的 BMI,南亚人比白人有更高的体脂百分比、更高的肝脏脂肪含量和更不利的代谢特征。南亚人可能比白人脂肪氧化程度低,这可能导致在暴露于高脂食物消费增加和体力活动减少时,代谢状况不利,就像目前的现代生活方式一样。目的测定南亚和白人男性在呼吸室久坐条件下高脂饮食过度喂养时的底物分配、肝脏脂肪堆积和代谢特征。设计 10 名南亚男性 (BMI,18-29 kg/m ^ 2) 和 10 名白人男性 (BMI,22-33 kg/m ^ 2),体脂百分比匹配, 纳入年龄 20-40 岁。给予体重维持饮食 (30% 脂肪、 55% 碳水化合物和 15% 蛋白质) 3 天。此后,进行肝脏脂肪含量 (1H-MRS) 和血液参数的基线测量。随后,受试者被高脂饮食 (150% 脂肪、 60% 碳水化合物和 25% 蛋白质) 过量喂养 (15% 能量需求) 连续 3 天以上,同时呆在呼吸室内,模仿久坐的生活方式。能量消耗和底物使用测定 3 × 24 h。受试者离开腔室后再次测定肝脏脂肪和血液参数。结果 24 h 脂肪氧化占总能量消耗的百分比在种族间无差异 (P = 0.30)。过度喂养增加了肝脏脂肪含量 (P = 0.02),但种族间的增加没有差异 (P = 0.64)。在南亚人,过度喂养倾向于增加 LDL-胆固醇 (P = 0.08),倾向于降低葡萄糖清除率 (P = 0.06) 并且倾向于升高胰岛素反应 (P = 0.07) 略高于白人。结论尽管底物分配相似,肝脏脂肪增加相似,但久坐条件下高脂过度喂养往往对南亚人的血脂和胰岛素敏感性有更多的不良影响。

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翻译标题与摘要 下载文献
影响因子:4.32
发表时间:2020-01-24
DOI:10.3390/ijms21010123
作者列表:["Tzi-Peng Yang","Hsiao-Mei Chen","Chao-Chin Hu","Li-Yuan Chen","Fen-Fen Shih","Disline Manli Tantoh","Kuan-Jung Lee","Yi-Chia Liaw","Rong-Tzong Tsai","Yung-Po Liaw"]

METHODS:Leptin (LEP) regulates glucose metabolism and energy storage in the body. Osteoarthritis (OA) is associated with the upregulation of serum LEP. LEP promoter methylation is associated with obesity. So far, few studies have explored the association of BMI and OA with LEP methylation. We assessed the interaction between body mass index (BMI) and OA on LEP promoter methylation. Data of 1114 participants comprising 583 men and 558 women, aged 30−70 years were retrieved from the Taiwan Biobank Database (2008−2015). Osteoarthritis was self-reported and cases were those who reported having ever been clinically diagnosed with osteoarthritis. BMI was categorized into underweight, normal weight, overweight, and obesity. The mean LEP promoter methylation level in individuals with osteoarthritis was 0.5509 ± 0.00437 and 0.5375 ± 0.00101 in those without osteoarthritis. The interaction between osteoarthritis and BMI on LEP promoter methylation was significant (p-value = 0.0180). With normal BMI as the reference, the mean LEP promoter methylation level was significantly higher in obese osteoarthritic individuals (β = 0.03696, p-value = 0.0187). However, there was no significant association between BMI and LEP promoter methylation in individuals without osteoarthritis, regardless of BMI. In conclusion, only obesity was significantly associated with LEP promoter methylation (higher levels) specifically in osteoarthritic patients.

翻译标题与摘要 下载文献
影响因子:4.82
发表时间:2020-01-01
DOI:10.1038/s41366-019-0368-2
作者列表:["Wulan, Siti N.","Schrauwen-Hinderling, Vera B.","Westerterp, Klaas R.","Plasqui, Guy"]

METHODS:Background For the same BMI, South Asians have a higher body fat percentage, a higher liver fat content and a more adverse metabolic profile than whites. South Asians may have a lower fat oxidation than whites, which could result in an unfavorable metabolic profile when exposed to increased high-fat foods consumption and decreased physical activity as in current modern lifestyle. Objective To determine substrate partitioning, liver fat accumulation and metabolic profile in South Asian and white men in response to overfeeding with high-fat diet under sedentary conditions in a respiration chamber. Design Ten South Asian men (BMI, 18–29 kg/m^2) and 10 white men (BMI, 22–33 kg/m^2), matched for body fat percentage, aged 20–40 year were included. A weight maintenance diet (30% fat, 55% carbohydrate, and 15% protein) was given for 3 days. Thereafter, a baseline measurement of liver fat content (1H-MRS) and blood parameters was performed. Subsequently, subjects were overfed (150% energy requirement) with a high-fat diet (60% fat, 25% carbohydrate, and 15% protein) over 3 consecutive days while staying in a respiration chamber mimicking a sedentary lifestyle. Energy expenditure and substrate use were measured for 3 × 24-h. Liver fat and blood parameters were measured again after the subjects left the chamber. Results The 24-h fat oxidation as a percentage of total energy expenditure did not differ between ethnicities ( P  = 0.30). Overfeeding increased liver fat content ( P  = 0.02), but the increase did not differ between ethnicities ( P  = 0.64). In South Asians, overfeeding tended to increase LDL-cholesterol ( P  = 0.08), tended to decrease glucose clearance ( P  = 0.06) and tended to elevate insulin response ( P  = 0.07) slightly more than whites. Conclusions Despite a similar substrate partitioning and similar accretion of liver fat, overfeeding with high-fat under sedentary conditions tended to have more adverse effects on the lipid profile and insulin sensitivity in South Asians.

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