Home Bratislava Medical Journal 2018 Bratislava Medical Journal Vol.119, No.1, p.41-46, 2018

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Published Monthly, in English
Founded: 1919
ISSN 0006-9248
(E)ISSN 1336-0345

Impact factor 1.564


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Bratislava Medical Journal Vol.119, No.1, p.41-46, 2018

Title: Blockade of miR-663b inhibits cell proliferation and induces apoptosis in osteosarcoma via regulating TP73 expression
Author: Y. Shu, W. Ye, Y. L. Gu, P. Sun

Abstract: OBJECTIVE: This study aimed to investigate the exact role of miR-663b in osteosarcoma (OS) progression and further explore the underlying molecular mechanisms.
MATERIALS AND METHODS: The miR-663b expression in human OS cell lines was determined by qRT-PCR, and the results suggested that miR-663b was highly expressed in human OS cells. TargetScan was used to predict the potential targets of miR-663b, and the prediction was confirmed by dual-luciferase reporter assay. To investigate the role of miR-663b in OS, miR-663b was down-regulated in U2OS cells using miR-663b inhibitor. CCK8 and flow cytometry were preformed to investigate the proliferation and apoptosis of U2OS cells. Moreover, qRT-PCR and western blot analysis were performed to measure the mRNA and protein expression.
RESULTS: We found that miR-663b directly targets TP73 and negatively regulates TP73 expression. MiR-663b inhibitor significantly decreased the proliferation ability of U2OS cells, while the percentage of apoptotic cells was markedly increased. The level of Bcl-2 was notably inhibited by miR-663b inhibitor, while Bax expression was significantly enhanced. Moreover, miR-663b down-regulation promoted p53 and p21 expression in U2OS cells.
CONCLUSIONS: MiR-663b down-regulation represses proliferation and induces apoptosis in OS by targeting TP73. Therefore, we provide a potential therapeutic target for OS treatment (Fig. 6, Ref. 27).

Keywords: osteosarcoma, miR-663b, TP73, proliferation, apoptosis
Published online: 22-Jan-2018
Year: 2018, Volume: 119, Issue: 1 Page From: 41, Page To: 46

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