Ets-2 regulates cell apoptosis via the Akt pathway, through the regulation of urothelial cancer associated 1, a long non-coding RNA, in bladder cancer cells

PLoS One. 2013 Sep 12;8(9):e73920. doi: 10.1371/journal.pone.0073920. eCollection 2013.

Abstract

The majority of the human genome is transcribed and generates non-coding RNAs (ncRNAs) that fail to encode protein information. Long non-coding RNAs (lncRNAs) are emerging as a novel class of ncRNAs, but our knowledge about these ncRNAs is limited. Previously, our laboratory has identified that a lncRNA, Urothelial cancer associated 1 (UCA1), played an important role in bladder cancer. Despite the recent interest in UCA1 as a diagnostic marker for bladder cancer, little is known about its transcriptional regulation. To elucidate the regulation of UCA1 gene expression, we have characterized the human UCA1 gene promoter. A 2.0-kb fragment of its 5' flanking region was cloned into a luciferase reporter vector. Deletion and mutation analysis suggested that an Ets-2 binding site was critical for UCA1 gene promoter activity. Further analysis of this site by gel shifting, chromatin immune precipitation (ChIP), and co-transfection experiments showed that transcription factor Ets-2 directly bound to the UCA1 promoter region and stimulated UCA1 promoter activity in bladder cancer cells. Taking into account the anti-apoptosis function of Ets-2, our data suggested that Ets-2 regulates apoptosis process by regulating the expression of UCA1, moreover UCA1 may be involved in the activation of Akt signaling pathway by Ets-2 in bladder cancer cells.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Apoptosis / genetics*
  • Base Sequence
  • Binding Sites
  • Cell Line
  • Cloning, Molecular
  • Computational Biology / methods
  • Gene Expression Regulation, Neoplastic
  • Gene Knockdown Techniques
  • Humans
  • Models, Biological
  • Molecular Sequence Data
  • Promoter Regions, Genetic
  • Protein Binding
  • Proto-Oncogene Protein c-ets-2 / metabolism*
  • Proto-Oncogene Proteins c-akt / metabolism*
  • RNA, Long Noncoding / genetics*
  • RNA, Long Noncoding / metabolism
  • Signal Transduction*
  • Transcription, Genetic
  • Transcriptional Activation
  • Urinary Bladder Neoplasms / genetics*
  • Urinary Bladder Neoplasms / metabolism*

Substances

  • Proto-Oncogene Protein c-ets-2
  • RNA, Long Noncoding
  • UCA1 RNA, human
  • Proto-Oncogene Proteins c-akt

Grants and funding

This work was supported by the grant from the Natural Science Foundation of China (Grant No. 81072104). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.