ZEB1-induced LINC01559 expedites cell proliferation, migration and EMT process in gastric cancer through recruiting IGF2BP2 to stabilize ZEB1 expression

Cell Death Dis. 2021 Apr 6;12(4):349. doi: 10.1038/s41419-021-03571-5.

Abstract

Gastric cancer (GC) is a common type of tumor that is characterized with high metastatic rate. In recent years, increasing studies have indicated that lncRNAs are involved in the regulation on cancer cell proliferation and migration. However, the functional role of long intergenic non-protein coding RNA 1559 (LINC01559) in GC is still unclear. In this study, we applied quantitative real-time polymerase chain reaction (RT-qPCR) and examined that LINC01559 expression was significantly enhanced in GC cells. Functional assays such as EdU, colony formation, JC-1 and transwell assays displayed that silencing LINC01559 inhibited cell proliferation and migration while promoted cell apoptosis in GC. Besides, western blot analysis and immunofluorescence assays examined the expression of factors related to epithelial-mesenchymal transition (EMT) and indicated that EMT process was blocked by LINC01559 knockdown in GC cells. Besides, LINC01559 silencing inhibited tumor growth in vivo. In addition, Chromatin immunoprecipitation (ChIP) assays demonstrated that zinc finger E-box binding homeobox 1 (ZEB1) served as a transcription factor to combine with LINC01559 promoter and activated the expression of LINC01559 in GC cells. In return, LINC01559 recruited insulin like growth factor 2 mRNA binding protein 2 (IGF2BP2) to stabilize ZEB1 mRNA to up-regulate ZEB1 in GC cells. In short, the findings in this research might provide a novel target for GC treatment.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Cell Line, Tumor
  • Cell Movement / genetics
  • Cell Proliferation / genetics*
  • Cell Proliferation / physiology
  • Epithelial-Mesenchymal Transition / genetics
  • Gene Expression Regulation, Neoplastic / genetics
  • Humans
  • RNA, Long Noncoding / genetics*
  • RNA-Binding Proteins / metabolism*
  • Stomach Neoplasms / genetics*
  • Stomach Neoplasms / metabolism
  • Stomach Neoplasms / pathology
  • Zinc Finger E-box-Binding Homeobox 1 / genetics
  • Zinc Finger E-box-Binding Homeobox 1 / metabolism*

Substances

  • IGF2BP2 protein, human
  • RNA, Long Noncoding
  • RNA-Binding Proteins
  • ZEB1 protein, human
  • Zinc Finger E-box-Binding Homeobox 1