4EBP1酸化介导TGF-β1诱导的肝纤维化,并上调HIF-1α表达
Yue Shi1, Zhandong Lin1,2,3, Congyue Zhang1,2,3
1Department of Internal Medicine, Hebei Medical University, Shijiazhuang, Hebei, China.
iScience
|September 29, 2025
概括
向化真核转化启动因子4E结合蛋白1 (p-4E-BP1) 可能治疗肝纤维化. 这项研究揭示了p-4E-BP1是肝星细胞激活和纤维化发展的关键因素.
科学领域:
- 生物化学 生物化学
- 细胞生物学 细胞生物学
- 病理学 病理学 病理学
背景情况:
- 化真核转化启动因子4E结合蛋白1 (p-4E-BP1) 与过度的细胞外基质产生和器官纤维化有关.
- 转化生长因子β1 (TGF-β1) 是纤维化过程中的关键媒介.
研究的目的:
- 研究p-4E-BP1在TGF-β1诱导的肝纤维化中的作用.
- 探索将p-4E-BP1作为抗纤维菌策略的潜在目标.
主要方法:
- 在TGF-β1激活的LX-2细胞和人类纤维性肝脏样本中证实了高的p-4E-BP1和HIF-1α表达.
- 在体内和体外实验涉及基因或药物向抑制p-4E-BP1活性.
- 评估细胞反应,包括激活,增殖,迁移,上皮细胞-介质细胞过渡 (EMT),亡和HIF-1α表达.
主要成果:
- 在激活的LX-2细胞和纤维性肝组织中,p-4E-BP1和HIF-1α的表达显著增加.
- 向p-4E-BP1在体外减少了TGF-β1诱导的LX-2细胞激活,增殖,迁移,EMT和HIF-1α表达,同时促进了亡.
- 在体内研究表明,向肝脏中的p-4E-BP1具有抗纤维作用.
- 使用短毛RNA对4E-BP1进行淘汰,产生了相反的效果.
结论:
- 在TGF-β1诱导的肝纤维化中,p-4E-BP1充当关键信号节点.
- 在肝星细胞纤维化转化中发现了一种以前未被识别的p-4E-BP1/HIF-1α信号通路.
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