J Mol Med:miR-96-5p通过ATG7抑制自噬来阻止肝星状细胞的活化。

2017-10-27 fengxiangxin MedSci原创

作为细胞外基质主要来源的肝星状细胞(HSC)的激活在肝纤维化发生中起着关键作用。近期的研究表明,肝星状细胞的自噬与肝纤维化发生有关,但对这一过程中肝星状细胞自噬的调节仍然知之甚少。

作为细胞外基质主要来源的肝星状细胞(HSC)的激活在肝纤维化发生中起着关键作用。近期的研究表明,肝星状细胞的自噬与肝纤维化发生有关,但对这一过程中肝星状细胞自噬的调节仍然知之甚少。

在本研究中,作者首先确定了miR-96-5p为在纤维化肝组织中异常表达的miRNA。接下来,作者将miR-96-5p模拟物转染到人肝星状细胞系LX-2中,观察到α-SMA(α-平滑肌肌动蛋白)和Col1A1(I型胶原基因)的蛋白和mRNA水平均降低。

miR-96-5p模拟物的转染显著降低了LX-2细胞的自噬活性,而miR-96-5p转染抑制剂的使用则促进了LX-2细胞的自噬水平。此外,研究者预测自噬相关蛋白7(ATG7)为miR-96-5p的潜在靶标,荧光素酶测定证实了其与miR-96-5p的直接相互作用。最后,研究者将ATG7重新引入LX-2细胞,发现miR-96-5p介导的自噬抑制以及α-SMA和Col1A1的表达发生了逆转。

总之,作者的研究证明miR-96-5p可以通过调节ATG7阻断自噬来抑制肝星状细胞的活化。这些发现为基于miRNA的抗纤维化治疗策略的发展提供了新的见解。

原始出处:

Yu K, Li N, Cheng Q.et al.miR-96-5p prevents hepatic stellate cell activation by inhibiting autophagy via ATG7.J Mol Med (Berl). 2017 Oct 19. doi: 10.1007/s00109-017-1593-6.

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    2018-04-27 smallant2002
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    2017-10-27 惠映实验室

    学习了.谢谢.

    0

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