Abstract:
:Objective: Chemotherapy is a major therapeutic method for bladder urothelial carcinoma (BUC), which can effectively improve the prognosis of BUC patients, but the chemoresistance often leads to chemotherapy failure. This study will research the regulatory roles and molecular mechanism of miR-101-3p in BUC chemoresistance. Materials and Methods: The quantitative real-time PCR was used to detect the expression of miRNA-101-3p and EZH2. The proliferation and chemoresistance were analyzed by CCK8 assay. Luciferase reporter assay was used to verify the combination between miR-101-3p and EZH2. Protein expression was detected by Western blotting. Flow cytometry was used to examine apoptosis rate. Results: The miR-101-3p expression was down-regulated in cisplatin (CDDP) resistant BUC cell line (T24/CDDP) and tissues, and was positively related to sensitivity of BUC to CDDP. In T24/CDDP cells, the up-regulation of miR-101-3p decreased the half maximal inhibitory concentration (IC50) to CDDP, depressed the expression of MRP1 protein, promote the CDDP-induced cytotoxicity, and advanced CDDP sensitivity. A series of in vitro experiments certified the EZH2 gene was a target gene of miR-101-3p, including luciferase reporter assay, western blotting and so on. Up-regulation of EZH2 largely reversed the regulatory effects of miR-101-3p enhancement on CDDP sensitivity in T24/CDDP cells. Conclusion: The expression of miR-101-3p is positively related to CDDP sensitivity of BUC, miR-101-3p advances sensitivity of BUC to CDDP through targeted silencing EZH2.
journal_name
J Cancerjournal_title
Journal of Cancerauthors
Li B,Xie D,Zhang Hdoi
10.7150/jca.33117subject
Has Abstractpub_date
2019-06-02 00:00:00pages
2628-2634issue
12issn
1837-9664pii
jcav10p2628journal_volume
10pub_type
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journal_title:Journal of Cancer
pub_type: 杂志文章
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