甲基醇对老年小鼠肠道和微生物组合的影响
Emanuela Tirelli1, Mariachiara Pucci1, Margherita Squillario2
1Department of Molecular and Translational Medicine, University of Brescia, Italy.
概括
饮食中的甲基醇 (MGO) 通过增加炎症和改变微生物群,破坏了老年小鼠的肠道健康. 这种葡萄糖毒素会影响紧密结合蛋白和粘液层厚度,影响肠道屏障功能.
科学领域:
- 胃肠病学 胃肠病学
- 微生物学 微生物学
- 毒理学 毒理学 毒理学
背景情况:
- 甲基醇 (MGO) 是加工食品中发现的反应性化合物,与糖尿病和神经退行性疾病有关.
- 虽然MGO在全身性疾病中的作用已知,但其对肠道的具体影响仍未得到充分探索.
- 这项研究研究了饮食中MGO对老鼠肠道健康的影响.
研究的目的:
- 为了研究慢性口服甲基醇 (MGO) 对老年小鼠肠道健康的影响.
- 分析MGO暴露后肠道炎症,屏障功能,形态和微生物群组成的变化.
主要方法:
- 年老的小鼠被给予MGO (100毫克/公斤/天) 持续4周.
- 用RT-PCR和免疫组织化学分析了肠道组织的炎症标记物,透性和紧结蛋白 (zonulin-1,ocludin).
- 使用16S rRNA基因测序来描述肠道微生物群的组成和代谢潜力.
主要成果:
- MGO治疗增加了MGO糖化蛋白,诱导了肠道炎症,并破坏了紧紧的结节 (松林-1,奥克卢丁).
- 肠道形态的变化包括帕内斯细胞的过度增殖和更厚的粘液层.
- 转基因转基因改变了微生物群,减少了酸盐生产者 (例如,鲁米诺可可科科) 和增加了阿克尔曼西亚和拉克诺斯皮拉科.
结论:
- 饮食中的甲基醇 (MGO) 对老年小鼠的肠道平衡有负面影响.
- 暴露于MGO会影响肠道屏障的完整性,诱导炎症,并重塑肠道微生物群.
- 这些发现表明,饮食中的葡萄糖毒素,肠道功能失调和肠道功能受损之间存在联系.
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