肠道透性,肠道炎症和肠道免疫系统反应与与衰老相关的肠道微生物群组成变化有关:一项对雌性小鼠的研究
Paola Elizabeth Gámez-Macías1,2, Elisa Félix-Soriano1,2, Mirian Samblas2
1Faculty of Pharmacy and Nutrition, Department of Nutrition, Food Science, and Physiology, University of Navarra, Pamplona, Spain.
概括
衰老会改变肠道微生物群的多样性和组成,增加炎症并损害小鼠的肠道屏障. 这些微生物变化与与年龄相关的肠道功能障碍和疾病风险相关.
科学领域:
- 微生物学 微生物学
- 免疫学 免疫学 免疫学
- 胃肠病学 胃肠病学
背景情况:
- 衰老与细胞变化和疾病风险增加有关.
- 肠道微生物群的组成与与年龄相关的疾病有关.
研究的目的:
- 分析便微生物群随着年龄的增长而发生的变化.
- 将这些变化与参与免疫反应,肠道炎症和肠道屏障功能的基因联系起来.
主要方法:
- 分析来自雌性小鼠2,6,12,18个月龄的便样本.
- 结肠组织中的基因表达分析.
主要成果:
- 年龄较大的小鼠表现出增加的微生物群多样性.
- 特定的细菌群体 (例如,蓝色细菌,蛋白质细菌,细菌类) 随着年龄的增长而增加,而其他细菌群体 (例如,Clostridiaceae,Lactobacillaceae) 则减少.
- 微生物群的不平衡与结肠炎症标志物 (Tnf-α,Ccl2,Ccl12) 的升高以及紧密结和免疫反应基因的减少表达相关.
结论:
- 老化小鼠肠道微生物群多样性的增加与改善的健康状况无关.
- 与年龄相关的肠道细菌失衡可能会导致免疫衰老,肠道炎症和漏肠.
- 这些发现凸显了肠道微生物群失生症在与衰老相关的疾病中的作用.
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