干扰素α刺激DEXH盒酶58,以防止肝细胞铁化
Kai-Wei Jia1, Ren-Qi Yao2,3, Yi-Wen Fan1
1National Key Laboratory of Medical Immunology & Institute of Immunology, Naval Medical University, Shanghai, 200433, China.
Military Medical Research
|April 15, 2024
概括
干扰素-α (IFN-α) 刺激DExH盒酶58 (DHX58) 来增强谷氨过氧化酶4 (GPX4) 的转化,防止肝脏缺血/再输液 (I/R) 损伤中的铁亡. 这一发现表明IFN-α是肝脏I/R损伤的潜在治疗方法.
科学领域:
- 肝病学 肝病学是一种肝病学.
- 分子生物学分子生物学
- 免疫学 免疫学 免疫学
背景情况:
- 肝脏缺血/再输 (I/R) 损伤是一个重要的临床问题,通常是手术,创伤或战争伤口造成的.
- 肝细胞铁亡是肝脏I/R损伤的关键因素,但其通过DEAD/DExH-box酶 (DDX/DHX) 家族成员的调节并未得到充分理解.
研究的目的:
- 调查DDX/DHX家族成员在肝脏I/R损伤中的作用.
- 阐明DExH盒酶58 (DHX58) 调节肝细胞铁亡的机制.
主要方法:
- 转录组分析以选肝脏I/R损伤中的DDX/DHX家族成员.
- 产生肝细胞特异的 Dhx58 淘汰赛小鼠和部分肝脏 I/R 的性能.
- 单细胞RNA测序 (scRNA-seq),RNA免疫沉测序 (RIP-seq) 和IP质谱 (IP-MS) 用于识别DHX58-相互作用分子.
主要成果:
- 活性氧物种 (ROS) 降低了Dhx58表达,促进了铁亡;IFN-α治疗增加了DHX58并防止了铁亡.
- DHX58结合Gpx4mRNA并招募YTHDC2以一种m6A依赖的方式促进Gpx4的翻译.
- 增强的DHX58表达导致GPX4蛋白水平增加,抑制铁亡.
结论:
- IFN-α刺激DHX58,从而促进m6A修饰的Gpx4mRNA的翻译,从而防止肝脏铁亡.
- 在肝脏I/R损伤时,DHX58作为铁亡的关键调节剂.
- IFN-α在预防肝脏I/R损伤期间的肝脏ferroptosis方面具有临床应用的潜力.
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