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TRPM2-AS Promotes Bladder Cancer by Targeting miR-22-3p and Regulating GINS2 mRNA Expression

Authors Tian Y, Guan Y, Su Y, Yang T, Yu H

Received 15 September 2020

Accepted for publication 19 January 2021

Published 23 February 2021 Volume 2021:14 Pages 1219—1237


Checked for plagiarism Yes

Review by Single anonymous peer review

Peer reviewer comments 4

Editor who approved publication: Professor Gaetano Romano

Yudong Tian,1 Yanbin Guan,2 Yang Su,1 Tao Yang,1 Haizhou Yu1

1Department of Urology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, 450000, People’s Republic of China; 2School of Pharmacy, Henan University of Traditional Chinese Medicine, Zhengzhou, Henan, 450046, People’s Republic of China

Correspondence: Yudong Tian
Department of Urology, The First Affiliated Hospital of Zhengzhou University, No. 1 Longhu Middle Ring Road, Zhengzhou, Henan, 450000, People’s Republic of China
Tel +86 15037183651

Background: Bladder cancer (BLCA) refers to the malignancy growth that spreads from the bladder linings to the bladder muscles. However, the impact of miR-22-3p and lncRNA TRPM2-AS on this tumor has generated divergent views in the literature. This research aimed to study the effects of lncRNA TRPM2-AS on BLCA and its interaction with miR-22-3p and GINS2 mRNA.
Methods: qRT-PCR was employed to measure the expression of TRPM2-AS, miR-22-3p and GINS2 mRNA in bladder tissues and cells. The subcellular localization of TRPM2-AS in T24 and 5637 cell lines was identified using a cell fractionation system. Luciferase assay, RIP assay and RNA pull-down assay were later performed to validate the direct binding relationship between TRPM2-AS, miR-22-3p and GINS2 mRNA. Several experiments were conducted to determine the viability, proliferation, colony formation and apoptosis of the cell lines.
Results: Findings indicated that TRPM2-AS was significantly upregulated in BLCA tissues and cell lines. Apart from that, it was observed that TRPM2-AS knockdown significantly inhibited the viability, proliferation and colony formation of BCLA cells, but it promoted the apoptosis of the BCLA cells. A significant downstream target of TRPM2-AS, miR-22-3p was found to show a lower expression level in BLCA tissues and cell lines. However, the inhibition of miR-22-3p considerably enhanced BLCA cell phenotypes. As well as discovering that GINS2 mRNA was a downstream target of miR-22-3p and was significantly upregulated in BLCA, experimental results also indicated that the knockdown of GINS2 suppressed BLCA cell phenotypes.
Conclusion: This research confirmed that TRPM2-AS could promote BCLA by binding to miR-22-3p to increase GINS2 expression. This novel interactome in BLCA cell lines might provide more insights into BLCA therapy.

Keywords: TRPM2-AS, miR-22-3p, GINS2, bladder cancer

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