在IPF衍生的纤维细胞中,PGC-1α调节了内细胞网膜应激
Qinghua Xu1, Huarui Liu1, Xiaorui Ding Shiwen Fan1
1Department of Pulmonary and Critical Care Medicine, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, Jiangsu, China; Lung Transplant Center, The Affiliated Wuxi People's Hospital of Nanjing Medical University, Wuxi, Jiangsu, China.
International immunopharmacology
|June 29, 2024
概括
过氧体增殖器激活受体马协作激活剂1-α (PGC-1α) 缺乏会促进内质网膜 (ER) 应激和肺纤维化. 恢复PGC-1α表达减轻ER压力和肺纤维化,将其确定为治疗点.
科学领域:
- 肺部医学 肺部医学
- 细胞生物学 细胞生物学
- 衰老研究研究 衰老研究
背景情况:
- 异形性肺纤维化 (IPF) 与衰老有关,其发病因子包括内质网膜 (ER) 应激和未折叠蛋白反应 (UPR).
- ER压力和衰老共享机制,老年IPF患者肺细胞的p16和p21增加证明了这一点.
- 在IPF纤维细胞中ER应激的确切作用仍然不完全理解.
研究的目的:
- 研究ER应激在IPF衍生纤维细胞中的作用.
- 阐明ER应激在肺纤维化中的调节机制.
主要方法:
- 在人类IPF组织和白素诱导的小鼠模型中评估了ER压力和纤维化标志物.
- 利用腺相关病毒 (AAV-6) 载体用于有条件的PGC-1α淘汰和纤维细胞中的过度表达.
- 在体内给予4-酸 (4-PBA),一种ER压力抑制剂.
主要成果:
- 在IPF肺部和模型中,ER压力和纤维化标志物 (例如α-SMA,原-I) 升高.
- 纤维细胞中PGC-1α表达的减少加剧了ER压力和肺纤维化.
- 纤维细胞特异性PGC-1α淘汰会使纤维化恶化,而4-PBA治疗或PGC-1α过度表达会减轻纤维化.
结论:
- 在IPF纤维细胞中,PGC-1α在调节ER压力方面发挥着关键作用.
- 减少PGC-1α表达有助于肺纤维化的发展.
- PGC-1α代表了治疗肺纤维化的潜在治疗标.
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