Home HOME Neoplasma 2021 Neoplasma Vol.68, No.5, p.1052–1062, 2021

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Neoplasma Vol.68, No.5, p.1052–1062, 2021

Title: An oncogenic lncRNA, GLCC1, promotes tumorigenesis in gastric carcinoma by enhancing the c-Myc/IGF2BP1 interaction
Author: Dong-Liang Yang, Lin-Fei Dong, Yin-Bing Qiu, Gen-Yan Luo

Abstract: Accumulating evidence has shown that long non-coding RNAs (lncRNAs) are vital regulators of the expression of various genes in multiple human diseases. The aim of this study was to investigate the role of glycolysis-associated lncRNA of colorectal cancer (GLCC1) in the progression of gastric carcinoma as well as the underlying mechanism. The expression levels of GLCC1 and c-Myc were determined in 47 pairs of gastric carcinoma tissues and cell lines using qRT-PCR (quantitative real-time polymerase chain reaction). Next, the functional roles of GLCC1 and c-Myc in the proliferation, apoptosis, migration and invasion of gastric carcinoma cells (BGC823 and SGC7901 cells) were determined by siRNA-mediated knockdown of these molecules, and the cells were evaluated by Cell Counting Kit-8 (CCK-8), flow cytometry and Transwell assays. In addition, RIP and RNA pull-down assays were used to examine the interaction between GLCC1 and c-Myc/IGF2BP1. Further mechanistic studies were conducted using western blotting. lncRNA GLCC1 and c-Myc were observed to be significantly increased in both gastric carcinoma tissues and cell lines. Knockdown of GLCC1 or c-Myc suppressed cell proliferation, migration and invasion but promoted apoptosis in both the BGC823 and SGC7901 cell lines. Mechanistically, c-Myc was identified as a downstream regulator involved in the GLCC1-mediated biological effects in gastric carcinoma. The RNA pull-down and PIP assays further showed that the up-regulation of lncRNA GLCC1 enhanced the interaction of the IGF2BP1 protein with c-Myc RNA, thus promoting the stabilization of c-Myc mRNA. Altogether, we demonstrated that lncRNA GLCC1 modulates gastric cancer cell migration and invasion by enhancing the c-Myc/IGF2BP1 interaction, and lncRNA GLCC1 may serve as a potential therapeutic target for preventing the development and progression of human gastric carcinoma.

Keywords: lncRNA GLCC1; IGF2BP1; c-Myc; gastric carcinoma; migration; invasion
Published online: 29-Jun-2021
Year: 2021, Volume: 68, Issue: 5 Page From: 1052, Page To: 1062

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