血管内皮细胞和肝细胞之间的EGFR介导的交联促进了依赖Piezo1的肝脏再生
Yuelei Hu1,2,3, Guifang Du2,3, Chao Li2,3
1Department of Hepatobiliary and Pancreatic Surgery, The First Hospital of Jilin University, Jilin University, Changchun, Jilin 130021, China.
Genes & diseases
|March 14, 2025
概括
机械刺激激活了血管内皮细胞 (VEC) 中的Piezo1通道,促进了肝脏再生 (LR). 这一过程通过特定的信号通路增强了肝细胞的增殖,帮助肝功能在受伤后恢复.
科学领域:
- 肝病学 肝病学是一种肝病学.
- 细胞生物学 细胞生物学
- 机械生物学 机械生物学
背景情况:
- 肝细胞的增殖对于受伤后的肝功能恢复至关重要.
- 肝脏手术中的血液动力学变化的机械刺激诱导了血管内皮细胞 (VEC) 的细胞因子分泌,促进了肝细胞的增殖和肝脏再生 (LR).
- 机械传感性离子通道Piezo1在LR期间的VEC中的作用尚不清楚.
研究的目的:
- 研究VEC中的Piezo1在肝脏再生过程中调解肝细胞增殖的机制.
- 为了阐明参与Piezo1-依赖性肝脏再生的信号通路.
主要方法:
- 一个由门静脉绑定诱导的肝脏再生的小鼠模型.
- 分析肝细胞增殖分布 (Ki67染色) 在肝叶中.
- 研究Piezo1激活,细胞因子分泌 (epiregulin,amphiregulin) 和下游信号 (PKC/ERK1/2,EGFR/ERK1/2) 在VEC和肝细胞中.
- 使用表皮生长因子受体 (EGFR) 抑制剂 (gefitinib) 来评估其对LR的影响.
主要成果:
- 肝细胞增殖主要在手术后24-48小时的肝叶片区1和2观察到.
- 在VEC中Piezo1的激活通过PKC/ERK1/2通路增加了epiregulin和ampiregulin的分泌.
- 这些细胞因子激活了肝细胞中的EGFR和ERK1/2信号,促进了细胞的增殖.
- 与区域3相比,EGFR表达在1区和2区肝细胞中较高.
- 盖菲提尼布治疗通过抑制中间区域的肝细胞增殖来抑制LR.
结论:
- 肝门血液动力学的早期变化激活了Piezo1在VEC中,启动了信号级联,促进了肝细胞的增殖.
- 通过Piezo1介导的途径涉及Epiregulin和Amphiregulin的VEC分泌,它们作用于肝细胞EGFR信号,推动肝脏再生.
- 这项研究揭示了一种新的机制,将机械刺激与化学信号联系起来,以调节肝脏再生.
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