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Research Paper|Volume 13, Issue 10|pp 14469—14481

Silencing lncRNA XIST exhibits antiproliferative and proapoptotic effects on gastric cancer cells by up-regulating microRNA-132 and down-regulating PXN

Ping Li1,2, Liuhua Wang3, Pengfei Li1, Fangyong Hu1, Yi Cao2, Dong Tang3, Gang Ye4, Hongbo Li4, Daorong Wang3
  • 1Department of General Surgery, Huaian Tumor Hospital, Huaian Hospital of Huaian City, Huaian, 223200, P.R. China
  • 2Department of Experimental Surgery-Cancer Metastasis, Medical Faculty Mannheim, Ruprecht Karls University, Mannheim 68167, Germany
  • 3Department of General Surgery, Northern Jiangsu Province Hospital, Clinical Medical College, Institute of General Surgery - Yangzhou, Yangzhou University, Yangzhou 225000, P.R. China
  • 4Department of General Surgery, Jiangdu People's Hospital of Yangzhou, Yangzhou 225200, P.R. China
* Equal contribution
Received: October 11, 2019Accepted: June 25, 2020Published: November 5, 2020
https://doi.org/10.18632/aging.103635

Copyright: © 2021 Li et al. This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Abstract

The present study aims to elucidate the potential therapeutic role of lncRNA XIST in gastric cancer through regulation of microRNA-132 (miR-132) and paxillin (PXN) expression. The study employed 65 gastric cancer tissue specimens and SGC7901 cell lines. Our results demonstrated that expression of lncRNA XIST and PXN was significantly elevated while the expression of miR-132 was significantly reduced in gastric cancer tissues. Dual-luciferase, RNA pull-down and RIP assays demonstrated that lncRNA XIST up-regulated the PXN expression by competitively binding to miR-132. Moreover, silencing of lncRNA XIST and up-regulation of miR-132 could suppress tumor formation ability, cell proliferation and migration, but enhanced apoptosis in gastric cancer. However, the overexpression of PXN achieved the opposite tumor-promotive effect. Meanwhile, rescue experiments suggested that silencing of lncRNA XIST could reverse the tumor-promotive effect exerted by either miR-132 inhibitor or PXN. Taken together, the present study demonstrates lncRNA XIST as a novel oncogenic lncRNA in gastric cancer, highlighting its therapeutic role in this disease.