Abstract
Treatment with cisplatin, a chemotherapeutic agent commonly used in glioma patients, often results in chemoresistance. Increasing evidence has shown that microRNAs (miRNAs) are implicated in the drug resistance of gliomas. However, the function of miR‑873 in cisplatin resistance of gliomas remains unknown. In this study, we found that many miRNAs, including miR‑873, are differentially expressed in cisplatin-resistant glioma cells compared to wild-type glioma cells. Moreover, cisplatin reduced the expression of miR‑873 in a time-dependent manner. Overexpression of miR‑873 decreased the cell proliferation, migration and invasion while increased apoptosis of cisplatin-resistant glioma cells and sensitized the cells to cisplatin-induced cell growth arrest and apoptosis. Furthermore, miR‑873 was downregulated while Bcl-2 was upregulated in the tissues of twelve high-grade glioma patients compared to seven normal brain tissues, and the miR‑873 level was negatively correlated with the Bcl-2 protein level. A luciferase reporter assay further confirmed that Bcl-2 was a direct target of miR‑873, and miR‑873 decreased the level of the Bcl-2 protein in cisplatin-resistant glioma cells. Notably, re-expression of Bcl-2 attenuated the functio...Continue Reading
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