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Updated: Feb 24, 2026

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Induction and Analysis of Epithelial to Mesenchymal Transition
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通过激活 EPAC-RAP1A 信号轴,ESRP1 驱动了表皮细胞-介质细胞过渡
Ruixin Qi1, Jiaqi Wang1, Guocang Cheng2
1Ningxia Key Laboratory of Clinical and Pathogenic Microorganisms, Institute of Medical Science, General Hospital of Ningxia Medical University, Yinchuan, China.
Frontiers in medicine
|February 23, 2026
概括
表皮剪接调节蛋白1 (ESRP1) 的上调促进异常性肺纤维化 (IPF),通过驱动表皮-介质细胞过渡 (EMT). 这通过Epac-Rap1a信号通路发生,突出显示ESRP1是IPF的潜在治疗标.
科学领域:
- 肺部医学 肺部医学
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
背景情况:
- 异形性肺纤维化 (IPF) 是一种致命的肺病,其中上皮-介质细胞过渡 (EMT) 是一个关键的病理特征.
- 在IPF中驱动EMT的精确分子机制仍然不完全理解.
- 这项研究调查了表皮剪接调节蛋白1 (ESRP1) 在IPFEMT病变发生过程中的作用.
研究的目的:
- 阐明ESRP1在IPF发病过程中调节EMT的功能.
- 为了确定ESRP1下游的分子参与者,参与EMT.
- 在IPF中建立ESRP1,EPAC和Rap1a之间的监管层次.
主要方法:
- 使用白素 (BLM) 建立的IPF小鼠模型和通过单细胞RNA测序 (scRNA-seq) 分析的肺组织.
- 在EMT中验证ESRP1功能,使用qPCR,西部斑,以及体外和体内免疫光.
- 利用lentivirus和siRNA调节TGF-β1治疗的MLE-12细胞中的ESRP1表达,以研究其在EMT中的机械作用.
主要成果:
- 与对照组相比,scRNA-seq在IPF小鼠的膜上皮细胞中发现了ESRP1的显著上调.
- 通过ESRP1 knockdown抑制了EMT标记物 (Epac,Rap1a,N-cad),而过度表达则增强了它们.
- 同免疫沉证实了ESRP1,Epac和Rap1a之间的相互作用,Epac和Rap1a是ESRP1的下游.
结论:
- 在膜上皮细胞中ESRP1上调促进IPF的进展,通过诱导EMT.
- Epac-Rap1a信号轴是IPF相关EMT中ESRP1调节的关键下游通路.
- ESRP1代表了一种潜在的治疗点,用于减轻异常性肺纤维化病的EMT.
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