氨基酸是肝脏脂肪生成的主要碳来源
Yilie Liao1, Qishan Chen2, Lei Liu3
1Zhongshan Institute for Drug Discovery (ZIDD), Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Zhongshan, Guangdong 528400, China; School of Life Sciences, Tsinghua University, Beijing 100084, China; Center for Neurometabolism and Regenerative Medicine, Bioland Laboratories, Guangzhou, Guangdong 510530, China; Duke-NUS Medical School, National University of Singapore, Singapore 169857, Singapore.
Cell metabolism
|October 26, 2024
概括
饮食中的蛋白质,而不是碳水化合物或脂肪,是代谢功能障碍相关的脂肪性肝病 (MASLD) 的主要营养风险. 氨基酸为脂肪酸合成提供燃料,低蛋白饮食可以防止体重增加并减少肝损伤.
科学领域:
- 代谢性疾病研究研究.
- 营养科学 营养科学
- 肝病学 肝病学是一种肝病学.
背景情况:
- 增加的新生脂质生成是肥胖中代谢功能障碍相关的脂肪性肝病 (MASLD) 的关键特征.
- 在MASLD中肝脏脂肪酸合成的主要宏观营养素来源尚不清楚.
研究的目的:
- 确定MASLD中肝脏脂肪生成的主要宏观营养素碳来源.
- 调查饮食氨基酸在MASLD病变发生中的作用.
- 评估低蛋白饮食作为对MASLD的潜在干预措施.
主要方法:
- 在小鼠模型中进行了ex vivo和in vivo同位素追踪研究.
- 对肝脏脂肪酸合成途径的分析.
- 评估肥胖,肝硬化和肝损伤.
- 在肥胖小鼠中评估低蛋白饮食 (LPDs).
主要成果:
- 饮食中的蛋白质,而不是碳水化合物或脂肪,是MASLD的主要营养风险因素.
- 氨基酸是TCA循环和脂质生成的主要碳来源.
- 食氨基酸在推动肝脂肪酸合成方面比葡萄糖更有效.
- 肥胖加剧了氨基酸在脂肪酸合成中的利用,这种利用是通过减少性炭化.
- 减少氨基酸流向脂质生成的干预措施可以缓解肝硬化症.
- 在肥胖小鼠中,LPDs防止体重增加,并减少肝脂积累和肝损伤.
结论:
- 饮食中的氨基酸在肝脏脂肪生成中起着重要的,以前不被重视的作用.
- 准氨基酸代谢是MASLD的一种新的营养干预策略.
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