• Xintai Zhong, Zhaolin Long, Shihao Wu, Meiling Xiao, and Weilie Hu.
• Southern Medical University, Guangzhou, Guangdong, China; 2Department of Urology, Shunde Hospital of Southern Medical University, Foshan, Guangdong, China.
• J Buon. 2018 May 1; 23 (3): 776-781.

PurposeThe purpose of this study was to investigate the expression of long-chain non-coding RNA (lncRNA) SNHG7 in bladder cancer tissues and cell lines, and to explore its impact on bladder cancer cell proliferation, apoptosis and invasion processes.MethodsBladder cancer tissues and near-cancer tissues were collected. The expression of lncRNA-SNHG7 in tissues and cell lines was detected by real-time PCR (RT-PCR). The expression of lncRNA-SNHG7 was downregulated by RNA interference (siRNA) as detected by RT-PCR that was used to detect the interference efficiency. CCK-8, flow cytometry and Transwell assays were used to evaluate the effect of lncRNASNHG7 on the proliferation, apoptosis and invasion capability of bladder cancer cells. The downregulation effect of lncRNA-SNHG7 on Epithelial-Mesenchymal Transition (EMT) related markers was tested by westernblot.ResultslncRNA-SNHG7 was upregulated in bladder cancer cell lines. After the expression of lncRNA-SNHG7 was downregulated, the proliferation of bladder cancer cells was decreased, the apoptosis was increased, and the invasion ability of cells was decreased. The expression of E-cadherin was increased, but the expression of N-cadherin, vimentin and snail were decreased. Increased expression of lncRNASNHG7 in cancer tissues was significantly related to tumor size, metastasis and stage.ConclusionsThis study showed that lncRNA -SNHG7 is overexpressed in bladder cancer tissues and cells. Downregulation of lncRNA-SNHG7 can inhibit the proliferation of bladder cancer cells and promote apoptosis, as well as inhibit cell invasion, which provides a potential molecular target for future tumor targeted therapy.

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