摄入葡萄糖的微生物群改变了C. elegans的肠表皮,增加了对多种细菌病原体的敏感性
Samuel F Kingsley1, Yonghak Seo1, Alicia Wood1
1Department of Molecular, Cell and Cancer Biology, UMass Chan Medical School, Worcester, MA, 01605, USA.
Scientific reports
|June 7, 2024
概括
高糖饮食通过改变肠道微生物群对健康产生负面影响. 这项研究表明,C. elegans中糖养的微生物群减少了寿命和健康期,增加了疾病易感性.
科学领域:
- 微生物学 微生物学
- 胃肠病学 胃肠病学
- 衰老研究研究 衰老研究
背景情况:
- 饮食糖的过度消费与诸如糖尿病和心血管疾病等众多健康问题有关.
- 人的肠道微生物群在整体健康中起着至关重要的作用,并受到饮食的影响.
- 由于微生物群的复杂性,了解肠道微生物群在慢性摄入糖中的作用具有挑战性.
研究的目的:
- 研究糖改变肠道微生物群对宿主健康的机制影响.
- 探索慢性摄入糖对寿命,健康和疾病易感性的影响.
- 要使用简化的C. elegans/E. 大肠杆菌模型研究宿主微生物群相互作用.
主要方法:
- 使用C. elegans和大肠杆菌 (E. coli) 的跨物种模型被采用.
- 大肠杆菌暴露在高葡萄糖条件下,以模拟富含糖的饮食.
- 然后将这些用葡萄糖养的大肠杆菌引入了C. elegans,以建立一个修饰的肠道微生物群.
主要成果:
- 葡萄糖养的微生物群显著减少了C. elegans的寿命和健康期 (运动).
- 减少寿命的关键因素包括肠道细菌密度增加和活性氧物种.
- 修改后的微生物群加速了与年龄相关的肠道功能障碍,包括增加透性和免疫失调,导致病原体易感性.
结论:
- 慢性摄入糖会通过改变肠道微生物群,深刻影响宿主健康.
- 这些微生物群的变化可能会导致炎症性肠道疾病和与年龄有关的疾病的发病率增加.
- 这种C. elegans/E. 大肠杆菌模型为饮食-微生物群-宿主相互作用提供了宝贵的机械洞察力.
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