内皮RUNX3控制LSEC功能障碍和血管性LRG1信号,以防止肝纤维化
Uttam Ojha1, Somi Kim2, Chang Yun Rhee1
1Vessel-Organ Interaction Research Center, VOICE (MRC), Research Institute of Pharmaceutical Sciences, Department of Molecular Pathophysiology, College of Pharmacy, Kyungpook National University, Daegu, Republic of Korea.
Hepatology (Baltimore, Md.)
|July 23, 2024
概括
肝脏内皮细胞中的RUNX3缺乏导致功能障碍并促进肝纤维化. 富含白的α-2-糖蛋白1 (LRG1) 被确定为一个关键的媒介,为肝纤维化提供了潜在的治疗标.
科学领域:
- 肝病学和血管生物学
- 纤维化分子机制的分子机制
- 肝脏疾病中的细胞信号传递
背景情况:
- 肝纤维化是一个重要的全球健康问题,治疗选择有限.
- 肝脏的鼻状内皮细胞 (LSEC) 对于肝脏的平衡和疾病至关重要.
- 在肝纤维化期间LSEC中RUNX3的作用以前是未知的.
研究的目的:
- 调查RUNX3在调节LSEC守门功能中的作用.
- 为了确定参与肝纤维化的新型血管分泌调节剂.
- 阐明RUNX3缺乏影响LSEC功能和肝纤维化的机制.
主要方法:
- 使用了内皮特异性的Runx3缺陷小鼠模型.
- 机理学研究涉及人类永生和小鼠初级LSECs.
- 单细胞RNA测序和定量RT-PCR确定了关键的分子参与者.
- 在体外和共同培养实验中评估了LRG1的分泌和功能.
- 在小鼠模型和人类患者中测量了循环LRG1水平.
主要成果:
- 内皮Runx3缺乏导致自发性肝纤维化和LSEC功能障碍.
- IL-6/JAK/STAT3通路的激活与没有RUNX3.3的LSEC功能障碍有关.
- 在RUNX3缺陷的LSEC中,富含白的α-2-糖蛋白1 (LRG1) 的上调.
- 通过TGFBR1-SMAD2/3信号传递分泌的LRG1激活的肝星细胞 (HSCs).
- 在肝纤维化模型和患者中观察到循环LRG1水平升高.
结论:
- 内皮细胞RUNX3对于维持LSEC守门功能至关重要.
- 由于RUNX3缺乏,通过LSEC功能障碍和LRG1分泌促进肝纤维化.
- 菌性血管性LRG1代表了肝纤维化的潜在治疗标.
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