MEF2A抑制了引发DDX41依赖的IFN生产的压力反应
Julian R Smith1, Jack W Dowling2, Matthew I McFadden3
1Department of Immunology, University of Washington, Seattle, WA 98109, USA.
Cell reports
|July 19, 2023
概括
细胞压力通过干扰素触发炎症. 这项研究揭示了肌细胞增强因子2A (MEF2A) 通过维持转录性稳态来防止R循环积累,这是这些炎症反应的关键驱动因素.
科学领域:
- 分子生物学分子生物学
- 免疫学 免疫学 免疫学
- 细胞应激反应的应激反应
背景情况:
- 细胞应激,包括转录中断和核酸损伤,可以激活通常用于对抗病原体的炎症信号通路.
- 无法控制的细胞应激会导致干扰素的不适当激活,导致自身炎症状况.
- R环,DNA-RNA杂交的结构,涉及触发炎症反应时,他们积累.
研究的目的:
- 研究转录因子肌细胞增强因子2A (MEF2A) 在调节细胞对转录应激反应中的作用.
- 确定MEF2A如何影响R循环积累和随后的炎症信号.
- 阐明ATM和RAD3相关 (ATR) 激酶在R环介导炎症中的参与.
主要方法:
- 在MEF2A函数的背景下分析细胞应激反应.
- 研究R环形成及其对炎症通路的影响.
- 评估ATR激酶在压力诱导的炎症中的作用.
主要成果:
- MEF2A的损失导致R循环积累的增加.
- R环积累诱导干扰素和炎症反应以DDX41-,cGAS-和STING-依赖的方式.
- 缺少MEF2A激活ATR激酶,这对于STING激活和随后的炎症至关重要.
结论:
- MEF2A在维持转录的平衡和防止异常炎症反应方面发挥着至关重要的作用.
- ATR激酶是积极调节R循环相关炎症信号的关键调解剂.
- 了解MEF2A-ATR轴为控制由细胞压力驱动的自身炎症提供了洞察力.
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