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针对细胞外线粒体阿斯巴提尔-tRNA合成酶的向降解调节免疫反应
Benjamin S Johnson1, Daniela Farkas1, Rabab El-Mergawy1
1Department of Internal Medicine, Division of Pulmonary, Critical Care, and Sleep Medicine, The Ohio State University, Columbus, OH, USA.
Nature communications
|July 22, 2024
概括
阿斯巴提尔-tRNA合成酶 (DARS2),一种线粒体蛋白质,在细菌性肺炎期间增强先天免疫力和细胞修复. 它的水平由FBXO24调节,为免疫增强疗法提供了一个目标.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 生物化学 生物化学
背景情况:
- 细菌性肺炎的严重程度与受损的先天免疫力和不有效的病原体清除有关.
- 线粒体蛋白质可以具有影响宿主防御的细胞外功能.
- 了解新型免疫调节剂对于治疗传染病至关重要.
研究的目的:
- 调查阿斯巴提尔-tRNA合成酶 (DARS2) 在细菌性肺炎中的作用.
- 阐明控制DARS2活动和稳定的分子机制.
- 探索DARS2作为增强宿主免疫力的潜在治疗点.
主要方法:
- 在人类细菌性肺炎中检测循环DARS2.
- 对DARS2与FBXO24的相互作用进行分析,FBXO24是一种全方位素E3结合酶.
- 对DARS2无处不在和降解途径的评估.
- 在实验性肺炎期间对Fbxo24绝杀小鼠进行表型分析.
- 在模拟中识别FBXO24抑制剂.
主要成果:
- DARS2是一种线粒体酶,在细菌性肺炎期间释放到循环中,并表现出先天的免疫和细胞修复功能.
- FBXO24针对DARS2进行降解,该过程被DARS2乙化抑制.
- Fbxo24淘汰赛小鼠显示肺DARS2水平增加,细胞透和细胞因子的产生.
- 在模型中确定了一种具有免疫刺激性质的FBXO24抑制剂,可以延长DARS2的寿命.
结论:
- 细胞外DARS2在对抗细菌性肺炎的宿主防御中起着重要作用.
- 通过FBXO24,无素-蛋白酶体系统调节DARS2的稳定性和功能.
- 针对DARS2-FBXO24相互作用,为开发免疫刺激疗法提供了一个新的策略.
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