持续的Yap/Taz激活促进异常的膜上皮细胞分化,并驱动持续的纤维化重塑
Isabella P Gaona1, A Scott McCall1,2, Natalie M Geis1
1Division of Allergy, Pulmonary, and Critical Care Medicine, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN 37232, USA.
bioRxiv : the preprint server for biology
|August 12, 2025
概括
在膜上皮细胞中持续的YAP/TAZ信号驱动失败的肺修复和异常性肺纤维化 (IPF) 中的纤维化. 阻止这种异常信号促进了适应性修复,为肺纤维化 (PF) 提供了潜在的治疗策略.
科学领域:
- 细胞生物学 细胞生物学
- 肺部医学 肺部医学
- 再生医学是一种再生医学.
背景情况:
- YAP/TAZ信号传递对于启动肺气膜修复至关重要.
- 以前的研究表明,在异常性肺纤维化 (IPF) 膜上皮细胞 (AEC) 中,YAP/TAZ信号增加.
- 目前尚不清楚持续的YAP/TAZ信号是否有助于IPF失败的修复和纤维性重塑.
研究的目的:
- 调查AEC中持续的YAP/TAZ信号是否有助于表皮细胞修复和纤维细胞重塑的失败.
- 探索阻断异常YAP/TAZ活性在肺纤维化 (PF) 的治疗潜力.
主要方法:
- 对比了IPF肺中的YAP/TAZ表达和向基因与供体对照.
- 在人类肺部有机体中药理上激活YAP/TAZ,以观察AEC表型变化.
- 产生的小鼠具有针对性Yap/Taz激活 (YTactive) 在膜类型2 (AT2) 细胞和诱导肺损伤 (白素).
- 在YT活性小鼠中评估了纤维细胞重塑,过渡细胞标记物和AT2细胞标记物.
- 在YT活跃小鼠中使用Verteporfin抑制Yap/Taz,并评估肺部的修复.
主要成果:
- 在IPF肺部,YAP+/TAZ+AEC增加,YAP/TAZ目标基因表达升高.
- 药理学YAP/TAZ激活诱导了肺器官中的异常过渡AEC状态.
- YT活性小鼠在受伤后表现出持续的纤维细胞重塑,过渡细胞标记物增加 (Krt19,Hopx,Runx2) 和AT2标记物减少 (Cebpa).
- 维特波芬治疗改善了YTactive小鼠的肺部修复,恢复了Cebpa,并减少了Krt19+过渡细胞.
结论:
- 持续的YAP/TAZ激活驱动异常的气膜修复和肺部持续的纤维化重塑.
- 阻止异常持续的YAP/TAZ活动促进了适应性修复.
- 准YAP/TAZ信号是一种潜在的肺纤维化治疗策略.
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