Identifying survival-associated ceRNA clusters in cholangiocarcinoma

Oncol Rep. 2016 Sep;36(3):1542-50. doi: 10.3892/or.2016.4934. Epub 2016 Jul 12.

Abstract

Competing endogenous RNAs (ceRNAs) represent a novel layer regulations of long non-coding RNAs (lncRNAs) and genes that play important roles in cancer pathogenesis by binding microRNAs (miRNAs). However, the competition mechanism of ceRNAs in cholangiocarcinoma (CHOL) is not fully understood. In this study, we constructed a dysregulated ceRNA competitive network (CCEN) to globally characterize the competing difference between CHOL and normal tissues. Then, we integrated affinity propagation and Kaplan‑Meier (K-M) methods to identify functional clusters associated with survival. A total of 7 key ceRNA clusters were identified. Further functional annotation analyses found that Cluster23 and Cluster32 involved cell based functions, and the loss of ceRNA competitive relations in clusters may contribute to CHOL, by disturbing important biological processes, such as 'Pathway in cancer', MAPK and Neurotrophin signaling pathway. This study provides further insights into understanding the competitive mechanism of ceRNAs in CHOL.

MeSH terms

  • Bile Duct Neoplasms / genetics*
  • Bile Ducts, Intrahepatic / pathology*
  • Cholangiocarcinoma / genetics*
  • Gene Expression Regulation, Neoplastic
  • Gene Regulatory Networks / genetics*
  • Humans
  • Kaplan-Meier Estimate
  • Multigene Family
  • RNA, Long Noncoding / genetics*

Substances

  • RNA, Long Noncoding