Hepatol Res:在HSCs中,通过维生素a偶联脂质体靶向治疗游离胆固醇积累,是一良好的治疗策略

2018-04-23 MedSci MedSci原创

研究结果表明,在HSCs中,游离胆固醇作为一种促进HSC激活的细胞内调解器的积累,导致了与血清胆固醇水平无关的人类和小鼠肝纤维化的激活。在HSCs中通过维生素a偶联脂质体系统靶向治疗FC积累,是肝纤维化的一种良好的治疗策略。

研究背景:肝纤维化是一种危及生命的疾病,目前并没有批准的治疗方法。最近,研究报道了小鼠肝星状细胞(HSC)的激活增加了游离胆固醇(FC)的积累,部分原因是通过增加甾醇调节元素结合蛋白2 (SREBP2)和microRNA-33a (miR-33a)的信号,从而使得HSC对转化生长因子-β (TGFbeta)诱导的肝纤维化的激活敏感化。

研究方法:从对照组患者和肝纤维化患者的手术肝脏标本中分离出人类的HSCs。C57BL/6小鼠经四氯化碳处理4周,同时给予SREBP2-siRNA-或抗mir -33a结合的维生素a脂质体。

研究结果:从肝纤维化患者肝脏中获得的人类激活的HSCs,游离胆固醇(FC)积累增加通过SREBP2和miR-33a信号的增强,可以独立于血清胆固醇水平。在肝星状细胞(HSC),FC水平的增高,增强了toll样受体4(TLR4)蛋白水平,降低了HSCs中TGF-β-pseudoreceptor Bambi(骨形态发生蛋白和激活膜结合抑制剂)的mRNA水平。值得注意的是,在小鼠肝纤维化模型中,通过抑制SREBP2或miR-33a表达方式,减少FC的积累,特别是在激活的HSCs中使用SREBP2-sirna-或抗miR-33a-结合的含维生素a-耦合脂质体,降低了TLR4信号水平,增加了Bambi表达,减轻了肝纤维化水平。

研究结论:研究结果表明,在HSCs中,游离胆固醇作为一种促进HSC激活的细胞内调解器的积累,导致了与血清胆固醇水平无关的人类和小鼠肝纤维化的激活。在HSCs中通过维生素a偶联脂质体系统靶向治疗FC积累,是肝纤维化的一种良好的治疗策略。

原始出处:

Furuhashi H1, Tomita K1, Teratani T, et al. Vitamin A-coupled liposome system targeting free cholesterol accumulation in hepatic stellate cells offers a beneficial therapeutic strategy for liver fibrosis. Hepatol Res, 2018 Apr;48(5):397-407. doi: 10.1111/hepr.13040.

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    2019-02-05 wjcjjian
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    2018-07-14 sjq035
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    2018-04-25 wwzzly
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    2018-04-25 gwc384
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    2018-04-25 飛歌

    厉害了我的哥

    0

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    2018-04-25 青山颖钰

    学习了

    0

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    2018-04-24 changjiu

    学习一下谢谢

    0

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