Immunopositivity for Histone MacroH2A1 Isoforms Marks Steatosis-Associated Hepatocellular Carcinoma

Francesca Rappa, Azzura Greco, Christine Podrini, Francesco Cappello, Michelangelo Foti, Lucie Bourgoin, Marion Peyrou, Arianna Marino, Nunzia Scibetta, Roger Williams, Gianluigi Mazzoccoli, Massimo Federici, Valerio Pazienza, Manlio Vinciguerra

Research output: Contribution to journalArticle

Abstract

Background: Hepatocellular carcinoma (HCC) is one of the most common cancers worldwide. Prevention and risk reduction are important and the identification of specific biomarkers for early diagnosis of HCC represents an active field of research. Increasing evidence indicates that fat accumulation in the liver, defined as hepatosteatosis, is an independent and strong risk factor for developing an HCC. MacroH2A1, a histone protein generally associated with the repressed regions of chromosomes, is involved in hepatic lipid metabolism and is present in two alternative spliced isoforms, macroH2A1.1 and macroH2A1.2. These isoforms have been shown to predict lung and colon cancer recurrence but to our knowledge, their role in fatty-liver associated HCC has not been investigated previously. Methods: We examined macroH2A1.1 and macroH2A1.2 protein expression levels in the liver of two murine models of fat-associated HCC, the high fat diet/diethylnistrosamine (DEN) and the phosphatase and tensin homolog (PTEN) liver specific knock-out (KO) mouse, and in human liver samples of subjects with steatosis or HCC, using immunoblotting and immunohistochemistry. Results: Protein levels for both macroH2A1 isoforms were massively upregulated in HCC, whereas macroH2A1.2 was specifically upregulated in steatosis. In addition, examination of human liver samples showed a significant difference (p

Original languageEnglish
Article numbere54458
JournalPLoS One
Volume8
Issue number1
DOIs
Publication statusPublished - Jan 29 2013

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Medicine(all)

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    Rappa, F., Greco, A., Podrini, C., Cappello, F., Foti, M., Bourgoin, L., Peyrou, M., Marino, A., Scibetta, N., Williams, R., Mazzoccoli, G., Federici, M., Pazienza, V., & Vinciguerra, M. (2013). Immunopositivity for Histone MacroH2A1 Isoforms Marks Steatosis-Associated Hepatocellular Carcinoma. PLoS One, 8(1), [e54458]. https://doi.org/10.1371/journal.pone.0054458