MiR-1180 promotes apoptotic resistance to human hepatocellular carcinoma via activation of NF-κB signaling pathway

Sci Rep. 2016 Mar 1:6:22328. doi: 10.1038/srep22328.

Abstract

Apoptosis resistance in human hepatocellular carcinoma (HCC) is a significant factor in carcinogenesis. Therefore, understanding the molecular mechanisms involved in apoptosis resistance is crucial for developing anticancer therapies. Importantly, small non-coding microRNAs (miRNAs) have been reported as key biomarkers for detecting tumour onset and progression. In the present study, we demonstrate that miR-1180 is upregulated in HCC. Ectopic expression of miR-1180 has an anti-apoptotic effect in HCC, while miR-1180 inhibition increases cell apoptosis, both in vitro and in vivo. Moreover, our results show that miR-1180 directly targets key inhibitors of the nuclear factor (NF)-κB signaling pathway (i.e., OTUD7B and TNIP2) and the pro-apoptotic Bcl-2 associated death promoter (BAD) protein by post-transcriptional downregulation. Therefore, the anti-apoptotic function of miR-1180 in HCC may occur through NF-κB pathway activation via downregulation of its negative regulators. In conclusion, our study reveals the critical role of miR-1180 during apoptosis resistance in HCC.

MeSH terms

  • Adaptor Proteins, Signal Transducing / genetics
  • Adaptor Proteins, Signal Transducing / metabolism
  • Apoptosis / genetics
  • Biomarkers, Tumor / genetics*
  • Carcinogenesis / genetics
  • Carcinoma, Hepatocellular / genetics*
  • Carcinoma, Hepatocellular / pathology
  • Cell Line, Tumor
  • Down-Regulation
  • Endopeptidases / genetics
  • Endopeptidases / metabolism
  • Gene Expression Regulation, Neoplastic
  • Humans
  • Liver Neoplasms / genetics*
  • Liver Neoplasms / pathology
  • MicroRNAs / genetics*
  • NF-kappa B / metabolism*
  • Signal Transduction / genetics
  • bcl-Associated Death Protein / genetics
  • bcl-Associated Death Protein / metabolism

Substances

  • Adaptor Proteins, Signal Transducing
  • BAD protein, human
  • Biomarkers, Tumor
  • MIRN1180 microRNA, human
  • MicroRNAs
  • NF-kappa B
  • TNIP2 protein, human
  • bcl-Associated Death Protein
  • Endopeptidases
  • OTUD7B protein, human