MiR-145 functions as a tumor suppressor by directly targeting histone deacetylase 2 in liver cancer

Cancer Lett. 2013 Jul 28;335(2):455-62. doi: 10.1016/j.canlet.2013.03.003. Epub 2013 Mar 14.

Abstract

Aberrant regulation of histone deacetylase 2 (HDAC2) plays a pivotal role in the development of hepatocellular carcinoma (HCC), but, the underlying mechanism leading to HDAC2 overexpression is not well understood. We performed microRNA (miRNA) profiling analysis in a subset of HCCs, and identified four down-regulated miRNAs that may target HDAC2 in HCC. Ectopic expression of miRNA mimics evidenced that miR-145 suppresses HDAC2 expression in HCC cells. This treatment repressed cancer cell growth and recapitulated HDAC2 knockdown effects on HCC cells. In conclusion, we suggest that loss or suppression of miR-145 may cause aberrant overexpression of HDAC2 and promote HCC tumorigenesis.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Carcinoma, Hepatocellular / genetics*
  • Cell Line, Tumor
  • Cell Proliferation
  • Genes, Tumor Suppressor*
  • Histone Deacetylase 2 / genetics*
  • Histone Deacetylase 2 / metabolism
  • Humans
  • Liver Neoplasms / genetics*
  • Mice
  • Mice, Nude
  • MicroRNAs / genetics
  • MicroRNAs / metabolism*
  • Neoplasm Transplantation
  • RNA Interference
  • RNA, Small Interfering
  • Xenograft Model Antitumor Assays

Substances

  • MIRN145 microRNA, human
  • MicroRNAs
  • RNA, Small Interfering
  • HDAC2 protein, human
  • Histone Deacetylase 2