菌根菌 LacI型转录调节器 Rv3575c 通过调节细菌mce4运营器介导的胆固醇运输来影响宿主天生的免疫力
Junfeng Zhen1, Yuerigu Abuliken1, Yaru Yan1
1Institute of Modern Biopharmaceuticals, State Key Laboratory Breeding Base of Eco-Environment and Bio-Resource of the Three Gorges Area, Key Laboratory of Eco-environments in Three Gorges Reservoir Region, Ministry of Education, School of Life Sciences, Southwest University, Chongqing 400715, China.
ACS infectious diseases
|September 5, 2024
概括
结核菌使用宿主胆固醇来生存. Rv3575c调节了这一过程,影响了细菌病原和宿主免疫反应.
科学领域:
- 微生物学 微生物学
- 分子生物学分子生物学
- 免疫学 免疫学 免疫学
背景情况:
- 结核菌利用宿主胆固醇作为碳源,在颗粒瘤内生存.
- 胆固醇代谢对于M.结核病原体的产生至关重要,涉及细胞壁重塑.
- 胆固醇吸收的调节机制及其对宿主-病原体相互作用的影响尚未完全理解.
研究的目的:
- 调查Rv3575c在M.结核病胆固醇代谢中的调节作用.
- 阐明Rv3575c对细菌生存和宿主免疫反应的影响.
主要方法:
- 研究了M.结核病中Rv3575c对mce4基因的转录调节.
- 使用Mycobacterium smegmatis作为模型生物来研究Rv3575c及其同类MSMEG6044.的功能.
- 评估了Rv3575c/MSMEG6044对胆固醇利用,细胞壁特性,耐药性和宿主免疫反应 (热,细胞因子产生) 的影响.
主要成果:
- Rv3575c在M.结核病中负面调节mce4基因转录.
- 在M. smegmatis中Rv3575c的过度表达损害了胆固醇利用,激活了宿主天生的免疫力,并触发了热.
- 在M. smegmatis中,MSMEG6044敲除增强了细胞壁的疏水性和透性,增加了乙胺醇耐药性,抑制了宿主免疫反应,并促进了巨细胞和小鼠中的细菌存活.
结论:
- Rv3575c在菌根菌病原发生过程中起着重要作用.
- Rv3575c 是胆固醇运输和利用在菌根菌中的关键调节者.
- 调节Rv3575c会影响细菌的健康状况和宿主免疫逃避策略.
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