Survivin inhibition is critical for Bcl-2 inhibitor-induced apoptosis in hepatocellular carcinoma cells

PLoS One. 2011;6(8):e21980. doi: 10.1371/journal.pone.0021980. Epub 2011 Aug 1.

Abstract

Our study aims to study the therapeutic effects of a novel Bcl-2 inhibitor, ABT-263, on hepatocellular carcinoma (HCC) and to provide primary preclinical data for future clinical trial with ABT-263. In this study we showed that Bcl-xL and survivin were up-regulated in HCC cell lines and human liver cancer tissues. Clinic used ABT-263 single treatment had no apoptotic effects on HCC cells whereas higher doses of ABT-263 did. Interestingly, the combination treatment of ABT-263 with survivin inhibitor YM-155 could result in significant apoptosis in HCC cells. Survivin inhibition through gene silencing significantly enhanced ABT-263 to induce apoptosis in HCC cells. We found that low dose of ABT-263 single treatment resulted in ERK activation and survivin up-regulation, which might be involved in the resistance of HCC cells to ABT-263 since blockade of ERK activation sensitized ABT-263-induced apoptosis. Importantly, ABT-263 and YM-155 combination treatment had no apoptotic effects on normal human hepatocytes. Taken together, these data suggest the combination treatment of Bcl-2 inhibitor and survivin inhibition may have a great potential for liver cancer therapy.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Aniline Compounds / pharmacology
  • Apoptosis / drug effects*
  • Carcinoma, Hepatocellular / pathology*
  • Cell Line, Tumor
  • Enzyme Activation
  • Extracellular Signal-Regulated MAP Kinases / metabolism
  • Gene Silencing
  • Hepatocytes / drug effects
  • Humans
  • Imidazoles / pharmacology
  • Inhibitor of Apoptosis Proteins / antagonists & inhibitors*
  • Inhibitor of Apoptosis Proteins / genetics
  • Liver Neoplasms / pathology*
  • Naphthoquinones / pharmacology
  • Proto-Oncogene Proteins c-bcl-2 / antagonists & inhibitors*
  • Sulfonamides / pharmacology
  • Survivin

Substances

  • Aniline Compounds
  • BIRC5 protein, human
  • Imidazoles
  • Inhibitor of Apoptosis Proteins
  • Naphthoquinones
  • Proto-Oncogene Proteins c-bcl-2
  • Sulfonamides
  • Survivin
  • Extracellular Signal-Regulated MAP Kinases
  • sepantronium
  • navitoclax