lncRNA LOC339524 inhibits the proliferation of bladder cancer cells by targeting the miR‑875‑5p/COPS7A signaling axis

He,Xuan; Xiao,He; Yang,Rui; Chen,Hang; Wang,Bin

doi:10.3892/etm.2021.10636

lncRNA LOC339524 inhibits the proliferation of bladder cancer cells by targeting the miR‑875‑5p/COPS7A signaling axis

Authors:
- Xuan He
- He Xiao
- Rui Yang
- Hang Chen
- Bin Wang
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Affiliations: Department of Oncology, Daping Hospital, Army Medical University, Chongqing 400042, P.R. China, Department of Cell Biology and Genetics, Chongqing Medical University, Chongqing 400016, P.R. China
Published online on: August 23, 2021 https://doi.org/10.3892/etm.2021.10636
Article Number: 1202
Copyright: © He et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

It has been reported that long non‑coding RNAs (lncRNAs) play a crucial role in the progression of various types of cancer. The role of numerous lncRNAs in a variety of cancer types has been investigated. However, the underlying mechanisms of the majority of lncRNAs in bladder cancer (BCa) remain to be elucidated. In the present study, abnormally expressed lncRNAs in BCa and para‑carcinoma tissues were identified through screening the Cancer RNA‑Seq Nexus database and were validated using reverse transcription‑quantitative PCR. It was found that LOC339524 expression levels were markedly downregulated in BCa tissues and cells (J82, T24, UM‑UC‑3 and 5637). LOC339524 overexpression was revealed to suppress the proliferation of BCa cells. LOC339524 was also discovered to act as a sponge for microRNA (miR)‑875‑5p, as identified using dual luciferase reporter assays and biotin pull‑down analysis. LOC339524 downregulated the expression of miR‑875‑5p and knockdown of miR‑875‑5p expression inhibited the proliferation of bladder cancer cells. In addition, COP9 signalosome subunit 7A (COPS7A) was identified to be the target gene of miR‑875‑5p and COPS7A expression level was upregulated following LOC339524 overexpression. lncRNA LOC339524 was proposed to function as a competitive endogenous RNA to facilitate the expression of COPS7A by binding to miR‑875‑5p. In conclusion, the findings of the present study suggested that LOC339524 may inhibit cell proliferation in BCa by targeting the miR‑875‑5p/COPS7A signaling axis.

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