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首页> 外文期刊>Journal of cellular biochemistry. >Overexpression of microRNA-122 enhances in vitro hepatic differentiation of fetal liver-derived stem/progenitor cells
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Overexpression of microRNA-122 enhances in vitro hepatic differentiation of fetal liver-derived stem/progenitor cells

机译:microRNA-122的过表达增强胎儿肝源性干/祖细胞的体外肝分化

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摘要

MicroRNAs (miRNAs) are a versatile class of tiny non-coding RNAs involved in regulation of various biological processes. miRNA-122 (miR-122) is specifically and abundantly expressed in human liver. However, the role of miR-122 in differentiation of fetal liver stem/progenitor cells into hepatocytes remains unclear. In this study, dual positive CD34+/CD117+ expressing human fetal liver stem/progenitor cells was enriched by magnetic cell sorting and cultured in vitro. The level of miR-122 was found to be increased at specific time intervals. Interestingly, during the differentiation process of hepatocyte-like cells, the increase in expression of miR-122 was positively correlated with expression of hepatocyte-specific genes. The status of differentiation process was improved by transfection of miR-122 into enriched stem/progenitor cells. The expression level of hepatic-specific genes as well as liver-enriched transcription factors (LETFs) was significantly increased by overexpression of miR-122 in fetal liver stem/progenitor cells. Thus, the study delineated the role of hepato-specific miR-122 in differentiation of fetal liver stem/progenitor cells into hepatocyte-like cells which could be used as a therapeutic target molecule to generate abundant hepatocytes.
机译:微小RNA(miRNA)是一类通用的微小非编码RNA,涉及各种生物过程的调控。 miRNA-122(miR-122)在人类肝脏中特异性表达并大量表达。但是,miR-122在胎儿肝干/祖细胞分化为肝细胞中的作用仍不清楚。在这项研究中,通过磁性细胞分选富集了双重表达CD34 + / CD117 +阳性的人胎儿肝干/祖细胞,并进行了体外培养。发现miR-122的水平在特定的时间间隔增加。有趣的是,在肝细胞样细胞分化过程中,miR-122表达的增加与肝细胞特异性基因的表达呈正相关。通过将miR-122转染到富集的干/祖细胞中,可以改善分化过程的状态。胎儿肝干/祖细胞中miR-122的过表达显着提高了肝特异性基因以及肝富集的转录因子(LETF)的表达水平。因此,该研究描述了肝特异性miR-122在胎儿肝干/祖细胞分化为类肝细胞中的作用,该类肝细胞可用作治疗靶分子以产生大量肝细胞。

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