杆菌亚种 (Mycobacterium avium) 结核病通过与β1整合素的相互作用,准体衍生单层中的M细胞
Grace Baruta1,2, Kyle L Flannigan1,2, Laurie Alston1,2
1Department of Physiology and Pharmacology, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada.
概括
菌 (Mycobacterium avium) 亚种结核病 (MAP) 首选感染肠表皮中的M细胞. 这种进入机制涉及纤维素结合,突出了研究宿主-病原体相互作用的新体外模型.
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:
- 结核病是一种传染性消耗性疾病,在反动物中是由Mycobacterium avium亚种结核病 (MAP) 引起的.
- MAP感染带来经济挑战和动物感染风险,其上皮细胞进入机制尚不清楚.
- 目前的理解表明,MAP的点是肠细胞和M细胞,可能更喜欢M细胞.
研究的目的:
- 开发和验证一种基于体的体外模型,以识别MAP在肠表皮中的细胞.
- 阐明MAP与肠道上皮细胞相互作用并进入肠道上皮细胞的机制.
- 调查纤维素和整体素在MAP的M细胞热流中的作用.
主要方法:
- 开发和验证使用功能M细胞进行基于体的体外测定.
- 模型暴露于MAP和随后的定量图像分析以确定细菌进入.
- 使用Caco-2/Raji-B共同培养系统进行的补充研究.
- 测试纤维素和整合素阻断对MAP-M细胞相互作用的影响.
主要成果:
- 在肠细胞和M细胞中检测到MAP,M细胞具有显著的热带性.
- 结合纤维蛋白和整体素的纤维蛋白结合过程被确定为MAPM细胞进入的关键机制.
- MAP的M细胞热带性被纤维素蛋白增强,并被整合素阻断取消.
结论:
- MAP优先准并进入肠表皮中的M细胞.
- 纤维内素桥梁机制在MAP的M细胞热流中起着至关重要的作用.
- 含有M细胞的体体是一种有价值的体外模型,用于研究肠道屏障中的宿主-病原体相互作用.
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