霍乱病毒通过对T6SS依赖的骨形态遗传蛋白通路的激活来阻止肠道上皮的增殖
1Department of Medical Microbiology and Immunology, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, AB T6G 2E1, Canada.
Cell reports
|February 10, 2024
概括
霍乱病毒感染通过激活骨形态遗传蛋白 (BMP) 途径阻断肠道修复,阻止原始细胞分裂. 这种保存机制在感染期间破坏了肠道屏障.
科学领域:
- 微生物学 微生物学
- 细胞生物学 细胞生物学
- 发展生物学 发展生物学
背景情况:
- 肠道原生细胞对于通过取代丢失的细胞来维持上皮屏障至关重要.
- 如果无法修复上皮层损伤,可能会导致肠道微生物的全身感染.
- 肠道病原体可以通过破坏组织修复机制来逃避宿主防御.
研究的目的:
- 调查Vibrio cholerae阻断肠道上皮质修复的机制.
- 为了确定参与V.霍乱中介抑制原生细胞增殖的宿主途径.
- 为了确定这种机制是否在整个物种中得到保护.
主要方法:
- 利用Drosophila模型研究V. cholerae感染和肠道修复.
- 研究了骨形态遗传蛋白 (BMP) 途径在V. cholerae诱导的增殖停止中的作用.
- 研究了V. cholerae对斑马鱼肠道前代细胞增殖的影响.
主要成果:
- 霍乱病毒通过激活祖先细胞中的BMP通路来阻断肠道上皮的修复.
- 霍乱和肠道共生体之间的相互作用通过宿主天生的免疫启动BMP信号传递.
- 霍乱病毒还激活了BMP信号,并阻止了斑马鱼的繁殖,这表明了进化的保护.
结论:
- 肠道病原体如V. cholerae利用宿主生长调节通路,特别是BMP通路,以损害肠道修复.
- 这种破坏组织修复是病原体用来克服宿主防御的进化保守策略.
- 了解这些病原体与宿主相互作用对于制定打击影响肠道的传染病的策略至关重要.
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