细胞间传播的Listeria monocytogenes绕过了复制细胞内细菌的营养限制
Prathima Radhakrishnan1, Julie A Theriot1
1Department of Biology and Howard Hughes Medical Institute, University of Washington, Seattle, WA 98195-1800.
bioRxiv : the preprint server for biology
|February 20, 2025
概括
由于宿主细胞内的营养物质耗尽,Listeria monocytogenes的复制速度会减慢. 细菌向新细胞传播受到宿主细胞结合的限制,平衡生长和资源的可用性.
科学领域:
- 微生物学 微生物学
- 细胞生物学 细胞生物学
- 传染性疾病 传染性疾病
背景情况:
- 李斯特菌 (Listeria monocytogenes) 是一种在宿主细胞内复制的细胞内病原体.
- 感染导致由宿主细胞之间的细菌传播形成的传染性焦点.
- 了解细菌复制动态和传播对于感染控制至关重要.
研究的目的:
- 研究影响Listeria monocytogenes细胞内复制率的因素.
- 确定宿主细胞营养的可用性和细菌的传播如何影响病原体的生长.
- 阐明宿主细胞结点蛋白在限制细菌传播中的作用.
主要方法:
- 时间间隔显微镜被用来监测感染焦点内的细菌生长.
- 细菌生长率的测量与宿主细胞营养水平相关.
- 评估了改变宿主细胞结点蛋白对细菌传播的影响.
主要成果:
- 细胞内Listeria monocytogenes最初的复制是指数级的,随着时间的推移,生长速度会减慢.
- 通过限制宿主细胞葡萄糖和寡进口来降低细菌的复制率.
- 宿主细胞结点蛋白质的改变减少了细菌的传播,但没有影响细胞内生长.
结论:
- 细胞内细菌的复制是一个动态的过程,受营养的可用性和宿主细胞相互作用的影响.
- 细菌细胞间传播使病原体能够获得新鲜的营养,延迟生长限制.
- 宿主细胞结点在控制病原体传播和感染进展方面发挥着重要作用.
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