多不和脂肪酸通过微生物群-肠-大脑轴促进食欲
Yi Jia Liow1,2, Shusei Eshima3, Mustafa Talay4
1Department of Human Evolutionary Biology, Harvard University, Cambridge, MA, USA.
bioRxiv : the preprint server for biology
|August 6, 2025
概括
工业化的饮食破坏了食欲的调节. 多不和脂肪酸 (PUFA) 通过改变肠道微生物群和大脑血清素代谢来增加食欲,影响饮食-微生物群-肠道-大脑轴.
科学领域:
- 神经科学是一个神经科学.
- 营养科学 营养科学
- 微生物学 微生物学
背景情况:
- 食欲调节涉及营养感应,整合长期的能量储存和短期的饮食线索.
- 工业化饮食破坏了这种调节,导致代谢和饮食障碍.
- 这些饮食改变饮食行为的神经机制仍然不清楚.
研究的目的:
- 研究工业化饮食的特定特性如何影响大脑神经化学和食欲.
- 为了确定神经通路和微生物机制,导致饮食诱导的食欲变化.
主要方法:
- 对西方与对照饮食,丰富的宏观营养素 (脂肪与糖) 和同热量权衡 (和多不和脂肪酸[PUFA]) 的比较分析.
- 对大脑神经化学的测量,特别是5-基酸 (5-HIAA).
- 将便微生物群移植给无菌小鼠,以评估肠道微生物群的作用.
主要成果:
- 多不和脂肪酸 (PUFA) 显著增加了食欲.
- 这种食欲增加是由大脑中高水平的5-氨酸 (5-HIAA) 介导的,这是一种与肠道微生物组相关的血清代谢物.
- 经过PUFA调节的肠道微生物群在没有细菌的小鼠中显示出增强食欲的特征.
结论:
- 工业化饮食中的饮食成分可以通过饮食-微生物组-肠道-大脑轴调节食欲.
- 多不和脂肪酸 (PUFA) 通过改变肠道微生物群和中枢血清素代谢促进食欲.
- 了解这些途径对于解决与现代饮食相关的改变饮食行为至关重要.
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