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肝纤维化是由肝炎病毒、酒精摄入过量或代谢紊乱引起的急性/慢性肝损伤的一种病理伤口愈合反应,也是慢性肝病发病率和病死率高的主要原因[1, 2]。肝纤维化的特点是I 型胶原和纤维连接蛋白等细胞外基质(ECM)成分的过多聚集,形成纤维疤痕扭曲肝脏结构,最终造成肝脏器官功能损伤[2]。研究显示,肝星状细胞(HSCs)的过度激活是肝纤维化进程中的关键环节,也是肝纤维化防治研究的重要靶点[3, 4]。
全反式维甲酸(ATRA)是维生素A主要的生物活性形式,已是急性早幼粒细胞白血病的标准治疗方案[5]。近期研究证实,ATRA可逆转HSCs的活化,并对肝纤维化具有抑制作用,但其具体机制尚未完全阐明[6]。本文拟在细胞水平探索ATRA抑制HSCs增殖及活化的作用和机制,为ATRA的临床应用提供理论和实验基础。
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