代谢重编程和渐进性肺纤维化需要PERK/ATF4通路
Jyotsana Pandey1, Jennifer L Larson-Casey1, Mallikarjun H Patil1
1Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA.
JCI insight
|April 10, 2025
概括
蛋白激酶RNA类ER激酶 (PERK) 在肺巨细胞中的激活驱动着石棉诱导的纤维化. 抑制PERK可以逆转已有的纤维化,这表明它是治疗这种渐进性肺病的潜在治疗标.
科学领域:
- 肺纤维化研究研究
- 细胞应激反应的细胞应激反应
- 巨生物学的生物学
背景情况:
- 石棉病是一种渐进的,不可逆转的纤维性肺病.
- 细胞内膜网膜 (ER) 压力与纤维化有关,但其在肺巨细胞中的作用尚不清楚.
研究的目的:
- 研究ER应激和蛋白质激酶RNA类ER激酶 (PERK) 在石棉病期间肺部巨细胞中的作用.
- 探索PERK作为一个潜在的治疗点来逆转已建立的纤维化.
主要方法:
- 在人类和小鼠肺部巨细胞中分析ER压力标志物.
- 在小鼠中遗传删除Eif2ak3 (PERK),以评估其在纤维化中的作用.
- 巨细胞的代谢分析 (氧气消耗率).
- 使用GSK2656157.7进行PERK的药理抑制.
主要成果:
- 在患有石棉病的个体和受石棉伤害的小鼠的肺巨中观察到ER压力和PERK激活.
- 缺乏Eif2ak3的小鼠被保护免受石棉诱导的纤维化.
- PERK的激活导致了对脂肪酸氧化 (FAO) 的代谢重编程,并增加了ATF4和PGC1α的表达.
- 通过减少FAO和关键基因表达,PERK抑制逆转了小鼠中已存在的纤维化.
结论:
- 肺巨细胞中PERK信号传递是石棉诱导的肺纤维化的一个关键驱动因素.
- 准PERK是一种有前途的治疗策略,用于逆转已存在的纤维化肺病.
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