Role of microRNAs in Hepatic Stellate Cells and Hepatic Fibrosis: An Update.

MicroRNAs (miRNAs) are small non-coding RNA molecules that regulate the expression of targets genes by binding to the 3'-untranslated regions. They play vital roles in diverse biological processes, including the development of hepatic fibrosis (HF). HF is characterized by the accumulation of extracellular matrix (ECM) and hepatic stellate cells (HSCs) are considered a major cell type for producing ECM. Alteration of the HSC phenotype plays a crucial role in the HF pathological process. MiRNAs involved in various biological process, such as differentiation, apoptosis, migration, and their relevant signaling pathways, are expressed in HSCs; however, emerging evidence indicates that numerous miRNAs are abnormally expressed in activated HSCs. In this review, we summarize the categorization of miRNAs in HF and describe the relationships among them. We also discuss miRNAs recently discovered to be related to HF, and attempt to find potential miRNAs that may serve as novel biomarkers for use in HF treatment.

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