LINC01572 Regulates Cisplatin Resistance in Gastric Cancer Cells by Mediating miR-497-5p

Onco Targets Ther. 2020 Oct 27;13:10877-10887. doi: 10.2147/OTT.S267915. eCollection 2020.

Abstract

Background: Chemotherapy resistance has long been recognized as a major obstacle to cancer treatment. Therefore, elucidating the underlying mechanisms of chemotherapy resistance is conducive to developing new strategies to improve patients' response to chemotherapy drugs.

Materials and methods: Real-time quantitative PCR (QPCR) was applied to measure the expression levels of lncRNAs. LINC01572 was down-regulated or up-regulated in GC cells transfected with either LINC01572 shRNA or overexpression vectors. In vitro and in vivo experiments were conducted to investigate the role of LINC01572 in autophagy-related chemotherapy resistance.

Results: Compared with the parental cells, drug-resistant GC cells had a higher level of LINC01572. Silencing of LINC01572 inhibited chemotherapy-induced autophagy, while its knockout sensitized GC cells against chemotherapy drugs. As a competitive endogenous RNA of miR-497-5p, LINC01572 weakened the inhibitory effect of miR-497-5p on ATG14, leading to chemically induced autophagy and chemotherapy resistance in GC cells.

Conclusion: A new mechanism of GC autophagy-related chemotherapy resistance regulated by lncRNA was explored in this study, providing a new perspective for understanding chemotherapy resistance.

Keywords: LINC01572; drug resistance; gastric cancer; miR-497-5p.

Grant support

This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.