MicroRNA-125a-5p Contributes to Hepatic Stellate Cell Activation through Targeting FIH1 - PubMed (original) (raw)

doi: 10.1159/000443095. Epub 2016 Apr 14.

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MicroRNA-125a-5p Contributes to Hepatic Stellate Cell Activation through Targeting FIH1

Guojun Li et al. Cell Physiol Biochem. 2016.

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Abstract

Background/aims: Emerging evidence shows that microRNAs (miRNAs) play a crucial role in the regulation of activation, proliferation and apoptosis of hepatic stellate cells (HSCs). Previous studies have indicated that miR-125a-5p is correlated with hepatitis B virus replication and disease progression. However, little is known about the biological role and underlying mechanism of miR-125a-5p in liver fibrosis.

Methods: We analyzed the level of miR-125a-5p in carbon tetrachloride-induced liver fibrosis and activated HSCs. We analyzed the effects of miR-125a-5p down-regulation on HSC activation and proliferation. We also analyzed the binding of miR-125a-5p to the 3'-untranslated region of factor inhibiting hypoxia-inducible factor 1 (FIH1) mRNA.

Results: Up-regulation of miR-125a-5p was observed in the liver tissues of fibrotic mice and activated HSCs. Down-regulation of miR-125a-5p prevented the activation and proliferation of HSCs. FIH1, a negative modulator of hypoxia inducible factor 1, was confirmed to be a target of miR-125a-5p using the luciferase reporter assay. Further studies demonstrated that miR-125a-5p prompted the activation and proliferation of HSCs, at least in part, by down-regulating FIH1.

Conclusion: Our findings shed new light on miRNAs as a promising therapeutic target in liver fibrosis.

© 2016 The Author(s) Published by S. Karger AG, Basel.

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