在TLR2激活后,TGFβ启动状巨细胞诱导I型IFN
Sean M Thomas1, Laurisa M Ankley1, Kayla N Conner1
1Department of Microbiology, Genetics, and Immunology, College of Osteopathic Medicine, Michigan State University, East Lansing, MI.
bioRxiv : the preprint server for biology
|September 16, 2024
概括
转化生长因子β (TGFβ) 调节膜巨细胞 (AMs) 的新陈代谢和炎症. 这项研究揭示了TGFββ.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 呼吸系统医学 呼吸系统医学
背景情况:
- 膜巨细胞 (AMs) 对肺免疫和功能至关重要.
- 转化生长因子β (TGFβ) 影响AM分化,但其在先天免疫中的直接作用尚不清楚.
- 针对AMs可以改善呼吸道感染疗法.
研究的目的:
- 调查TGFβ在调节AM先天免疫反应中的直接作用.
- 定义TGFβ如何调节AMS中的基因表达和炎症信号.
- 探索TGFβ对AM代谢状态和对免疫刺激的反应的影响.
主要方法:
- 利用一个优化的胎儿肝脏衍生膜状巨细胞 (FLAMs) 的ex vivo模型.
- 进行了转录分析,以确定休息FLAM中TGFβ调节的基因表达.
- 在不同的TGFβ条件下对TLR2激动剂评估FLAM和初级AM反应.
主要成果:
- TGFβ通过氧化酸化促进脂质代谢并抑制炎症来维持AM代谢平衡.
- TGFβ信号传递出乎意料地增强了对TLR2激动剂的I型干扰素 (IFN) 反应,这种反应取决于MAVS,IRF3和IRF7.
- 无论是TGFβ阳性还是TGFβ阴性FLAM,都对TLR2激动剂表现出强有力的反应.
结论:
- TGFβ在AM中起着双重作用,维持代谢平衡,同时增强特定的炎症途径,如I型IFN信号传递.
- 这些发现突出了TGFβ对AMs的复杂调节,影响其代谢和免疫功能.
- 了解TGFβ对AMs的调制,为肺部疾病和感染提供了新的治疗策略.
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