的多糖化合物通过向肠道微生物群和肠道屏障完整性来改善高脂肪饮食的小鼠中与肥胖相关的认知功能障碍
Ling Mo1,2, Jingjing Li1,2, Hangsun Lu2
1Guangxi Key Laboratory of Environmental Exposomics and Entire Lifecycle Health, School of Public Health, Guilin Medical University, Guilin 541199, China. 2559341252@QQ.com.
Food & function
|July 11, 2024
概括
的多糖 (APs) 通过重塑肠道微生物群和增强肠道屏障完整性来改善高脂肪饮食引起的认知障碍. 这项研究揭示了APs作为潜在的治疗对认知衰退.
科学领域:
- 微生物学 微生物学
- 神经科学是一个神经科学.
- 营养科学 营养科学
背景情况:
- 的多糖 (AP) 显示了对认知增强的潜力,但机制尚不清楚.
- 高脂肪饮食 (HF) 诱导认知缺陷和肠道失调.
- 了解AP对肠道微生物群和认知功能的影响至关重要.
研究的目的:
- 研究AP补充剂对高脂肪饮食引起的认知障碍的影响.
- 阐明涉及肠道微生物群,肠道屏障完整性和神经炎症的潜在机制.
主要方法:
- 在高脂肪饮食模型中,在24周内补充AP.
- 使用测序分析肠道微生物群组成.
- 评估肠道屏障功能,LPS泄漏,氧化应激和炎症标志物.
- 对认知和炎症途径的基因表达分析.
主要成果:
- APs显著改善了HF养受试者的认知行为障碍.
- APs调节了肠道微生物群,增加了有益的属 (例如,Akkermansia),减少了有害的属.
- AP恢复了肠道屏障的完整性,减少了LPS泄漏,改善了氧化应激和炎症.
- APs上调了与认知相关的基因 (CREB,BDNF,TrkB) 和下调的炎症基因 (IL-1β,IL-6,TNF-α).
结论:
- APs通过积极改变肠道微生物群组成来改善HF诱导的认知障碍.
- 改善肠道屏障完整性和减少炎症是调解AP认知益处的关键机制.
- APs代表了一种有前途的治疗策略,针对认知健康的肠-大脑轴.
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