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miR-17 regulates the proliferation and differentiation of retinal progenitor cells by targeting CHMP1A.

Biochem Biophys Res Commun. 2020 Mar 05;523(2):493-499. Epub 2019 Dec 29
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摘要


MicroRNAs have a vital effect on the differentiation of many types of progenitor cells. Recent studies have suggested that miR-17 plays an important role in the differentiation process of brain neural progenitor cells (NPC). Nevertheless, its detailed functions in regulating retinal progenitor cells (RPC) remain unclear. In our study, overexpression and knockdown of miR-17 were performed by transfecting RPC with mimics and inhibitors, respectively. Next, we investigated the role of miR-17 in RPC proliferation and differentiation by the following experiments: qPCR, CCK8, Edu staining, immunostaining and Western blot. The results revealed that miR-17 inhibited RPC proliferation but enhanced differentiation. Furthermore, according to a web-based database analysis, we identified charged multivesicular body protein 1A (CHMP1A) as a target gene. A dual luciferase reporter system showed that miR-17 specifically binds to the CHMP1A 3' untranslated region (UTR). Next, our data showed upregulation of miR-17 decreased CHMP1A protein level, causing reduced proliferation and enhanced differentiation of RPC. Downregulation of miR-17 led to enhanced CHMP1A protein expression, increased RPC proliferation and decreased differentiation. Taken together, our data provide a proven pathway by which miR-17 regulates RPC proliferation and differentiation by targeting CHMP1A.

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