Proteome analysis of a hepatocyte-specific BIRC5 (survivin)-knockout mouse model during liver regeneration

J Proteome Res. 2014 Jun 6;13(6):2771-82. doi: 10.1021/pr401188r. Epub 2014 May 27.

Abstract

The Baculoviral IAP repeat-containing protein 5 (BIRC5), also known as inhibitor of apoptosis protein survivin, is a member of the chromosomal passenger complex and a key player in mitosis. To investigate the function of BIRC5 in liver regeneration, we analyzed a hepatocyte-specific BIRC5-knockout mouse model using a quantitative label-free proteomics approach. Here, we present the analyses of the proteome changes in hepatocyte-specific BIRC5-knockout mice compared to wildtype mice, as well as proteome changes during liver regeneration induced by partial hepatectomy in wildtype mice and mice lacking hepatic BIRC5, respectively. The BIRC5-knockout mice showed an extensive overexpression of proteins related to cellular maintenance, organization and protein synthesis. Key regulators of cell growth, transcription and translation MTOR and STAT1/STAT2 were found to be overexpressed. During liver regeneration proteome changes representing a response to the mitotic stimulus were detected in wildtype mice. Mainly proteins corresponding to proliferation, cell cycle and cytokinesis were up-regulated. The hepatocyte-specific BIRC5-knockout mice showed impaired liver regeneration, which had severe consequences on the proteome level. However, several proteins with function in mitosis were found to be up-regulated upon the proliferative stimulus. Our results show that the E3 ubiquitin-protein ligase UHRF1 is strongly up-regulated during liver regeneration independently of BIRC5.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • CCAAT-Enhancer-Binding Proteins
  • Gene Expression
  • Gene Knockout Techniques
  • Hepatocytes / metabolism*
  • Inhibitor of Apoptosis Proteins / genetics*
  • Liver / cytology
  • Liver / physiology
  • Liver Regeneration*
  • Mice, Knockout
  • Nuclear Proteins / genetics
  • Nuclear Proteins / metabolism*
  • Proteome / genetics
  • Proteome / metabolism*
  • Repressor Proteins / genetics*
  • Survivin
  • Ubiquitin-Protein Ligases
  • Up-Regulation

Substances

  • Birc5 protein, mouse
  • CCAAT-Enhancer-Binding Proteins
  • Inhibitor of Apoptosis Proteins
  • Nuclear Proteins
  • Proteome
  • Repressor Proteins
  • Survivin
  • Ubiquitin-Protein Ligases
  • Uhrf1 protein, mouse