在MCP-1/CCR2轴调节M2巨细胞极化和免疫抑制在mycobacterium结核病
Guizeng Zhao1, Can Guo1,2, Xiaoyang Li1
1The First Affiliated Hospital of Xinxiang Medical University, Weihui, Xinxiang, China.
Frontiers in immunology
|January 21, 2026
概括
准MCP-1/CCR2通路通过逆转免疫逃避来对抗Mycobacterium结核病. 这种方法减少了M2巨细胞的两极化和免疫抑制,恢复了宿主对结核病的防御能力.
科学领域:
- 免疫学 免疫学 免疫学
- 微生物学 微生物学
- 病变的发生和发病.
背景情况:
- 结核菌 (MTB) 通过重编程巨细胞功能来逃避宿主免疫力.
- 化学基因MCP-1及其受体CCR2与单细胞招募和免疫调节有关.
- MCP-1/CCR2轴在MTB病原体中的确切作用尚不清楚.
研究的目的:
- 调查MCP-1/CCR2轴在MTB病原发生中的作用.
- 评估针对MCP-1/CCR2在MTB感染期间对巨细胞功能和宿主免疫反应的影响.
主要方法:
- 利用感染H37Ra的小鼠模型来评估MTB毒性和自标志物.
- 进行了转录组分析,以确定与CCR2相关的基因表达变化.
- 通过各种分子和细胞测试,评估了CCR2抗剂和MCP-1敲击对巨细胞亡,极化和细胞因子产生的影响.
主要成果:
- 抑制CCR2降低了MTB ESAT-6表达,并恢复了Beclin-1水平,缓解了肺炎.
- H37Ra感染激活了参与免疫反应和亡的CCR2依赖基因 (例如,Trim30,Fas,PD-1).
- 抑制MCP-1增强了巨细胞亡,逆转了M2极化,抑制了免疫抑制信号,并调节了促炎和抗炎细胞因子配置.
结论:
- MCP-1/CCR2轴促进M2巨细胞的两极分化,抑制细胞亡,并在H37Ra感染期间增强免疫抑制信号.
- 针对CCR2/MCP-1轴提供了一种潜在的治疗策略,以克服MTB感染中的免疫逃避.
- 通过MCP-1/CCR2调制恢复宿主防御机制可能对控制结核病至关重要.
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