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  • Title: MicroRNA-101-3p inhibits proliferation in retinoblastoma cells by targeting EZH2 and HDAC9.
    Author: Jin Q, He W, Chen L, Yang Y, Shi K, You Z.
    Journal: Exp Ther Med; 2018 Sep; 16(3):1663-1670. PubMed ID: 30186385.
    Abstract:
    Retinoblastoma is the most frequent intraocular malignant tumor type to occur in childhood. MicroRNA (miR)-101-3p has been reported to function as a tumor suppressor in various types of cancer. However, the biological function and underlying mechanisms of miR-101-3p in retinoblastoma are largely unknown. In the present study, it was identified that miR-101-3p was downregulated in retinoblastoma. MTT and flow cytometry assays demonstrated that ectopic overexpression of miR-101-3p significantly inhibited cell viability and cell cycle progression in WERI-Rb-1 and Y79 cells. In vivo mouse experiments further confirmed the anti-proliferative role of miR-101-3p in retinoblastoma. Additionally, predictions with TargetScan software indicated that the 3'-untranslated regions of enhancer of zeste homolog 2 (EZH2) and histone deacetylase (HDAC9) mRNAs are targeted by miR-101-3p. Accordingly, a dual luciferase reporter gene assay demonstrated that miR-101-3p directly targeted EZH2 and HDAC9 to suppress the proliferation of retinoblastoma cells. Meanwhile, the restoration of EZH2 or HDAC9 expression countered the anti-proliferative effect of miR-101-3p on WERI-Rb-1 and Y79 cells. Collectively, these data highlight the role of miR-101-3p in the tumorigenesis of retinoblastoma, and indicate its suitability as a novel therapeutic target.
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