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首页> 外文期刊>Journal of Agricultural and Food Chemistry >Threonine, but Not Lysine and Methionine, Reduces Fat Accumulation by Regulating Lipid Metabolism in Obese Mice
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Threonine, but Not Lysine and Methionine, Reduces Fat Accumulation by Regulating Lipid Metabolism in Obese Mice

机译:苏氨酸,但不是赖氨酸和蛋氨酸,通过调节肥胖小鼠的脂质代谢来降低脂肪积累

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摘要

Some amino acids (AAs) have been proven to suppress fat mass and improve insulin sensitivity. However, the impact of important essential AAs, threonine, lysine, and methionine, on obesity has not been clarified. In the present study, after an 8 week period of obesity induction, mice were grouped to receive either a high-fat diet (HFD) or HFD supplemented with lysine, threonine, or methionine (3% in drinking water) for another 10 weeks. The results showed that dietary supplementation with threonine significantly decreased body weight, epididymal and perirenal fat pad weights, serum concentrations of glucose, triacylglycerols, total cholesterol, and LDL-cholesterol compared to the HFD group. HOMA-IR and serum leptin and adiponectin were improved by threonine supplementation. In epididymal adipose tissue, threonine treatment significantly down-regulated the expression levels of lipogenesis and up-regulated expressions of lipolysis compared to the HFD group. Threonine addition stimulated the expression of UCP-1 and related genes in brown adipose tissue. However, lysine or methionine supplementation showed little effect on body weight, WAT weight, serum lipid profiles, and lipid-metabolism-related gene expressions of HFD-fed mice. These findings suggest that threonine inhibited fat mass and improved lipid metabolism of already obese mice, providing a potential agent in treating obesity.
机译:已经证明了一些氨基酸(AAS)以抑制脂肪质量并改善胰岛素敏感性。然而,尚未澄清重要的必需AAS,苏氨酸,赖氨酸和蛋氨酸的影响。在本研究中,在8周的肥胖诱导期后,将小鼠分组,以获得补充有赖氨酸,苏氨酸或蛋氨酸的高脂饮食(HFD)或HFD(在饮用水中为3%)10周。结果表明,与HFD组相比,苏氨酸的膳食补充剂与苏氨酸显着降低,血清浓度,葡萄糖,三酰基甘油,总胆固醇和LDL-胆固醇的血清浓度。通过苏氨酸补充剂改善了HOMA-IR和血清瘦蛋白和脂联素。在附睾脂肪组织中,苏氨酸处理显着下调了与HFD组相比的脂肪生成和上调表达的表达水平。苏氨酸添加刺激了棕色脂肪组织中UCP-1和相关基因的表达。然而,赖氨酸或蛋氨酸补充对体重,Wat重量,血清脂质谱和脂质 - 代谢相关的HFD-FED小鼠的脂质 - 代谢相关的基因表达而言。这些发现表明,苏氨酸抑制了已经肥胖小鼠的脂肪肿大和改善的脂质代谢,提供了治疗肥胖症的潜在试剂。

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