糖甘-Chi3l1相互作用塑造了肠道粘液层中的肠道微生物群
Yan Chen1, Ruizhi Yang1, Bin Qi1
1Southwest United Graduate School, Yunnan Key Laboratory of Cell Metabolism and Diseases, State Key Laboratory of Conservation and Utilization of Bio-resources in Yunnan, Center for Life Sciences, School of Life Sciences, Yunnan University, Kunming, China.
主体蛋白质基因酶3样蛋白1 (Chi3l1) 调节粘液中的肠道细菌. 缺少1会破坏肠道微生物群的平衡,恶化结肠炎,而其恢复会改善肠道健康.
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:
- 肠道粘液层中的肠道微生物群对宿主健康至关重要.
- 肠道粘液微生物群落宿主调节的机制在很大程度上是未知的.
研究的目的:
- 研究宿主产生的蛋白质在调节肠道菌群组成中的作用,在肠道粘液层内.
- 阐明基因酶3样蛋白1 (Chi3l1) 在宿主微生物相互作用中的功能及其对肠道平衡和疾病的影响.
主要方法:
- 由肠道微生物群刺激肠道上皮细胞以诱导Chi3l1的表达.
- 对1分泌到粘液层的分析及其与细菌酸糖的相互作用.
- 对1缺乏对肠道微生物群和硫酸诱导的大肠炎的影响的评估.
- 便微生物群移植和有针对性的细菌补充 (Lactobacillus) 以恢复肠道平衡.
主要成果:
- 肠道粘液层中受宿主调节的细菌殖民是通过Chi3l1.1进行的.
- Chi3l1与细菌酸糖相互作用,促进殖民,特别是像乳酸菌这样的格兰阳性细菌.
- 缺1导致肠道失调并加剧结肠炎.
- 恢复乳酸菌或便微生物群移植改善了小鼠Chi3l1缺乏的大肠炎.
结论:
- 提出了微生物群恒温的"支架模型",涉及Chi3l1-细菌细胞壁相互作用.
- 肠道粘液中的肠道微生物群不平衡有助于结肠炎的发展.
- Chi3l1是维持肠道屏障功能和微生物平衡的关键宿主因素.
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