Spike-in SILAC proteomic approach reveals the vitronectin as an early molecular signature of liver fibrosis in hepatitis C infections with hepatic iron overload

Claudia Montaldo, Simone Mattei, Andrea Baiocchini, Nicolina Rotiroti, Franca Del Nonno, Leopoldo Paolo Pucillo, Angela Maria Cozzolino, Cecilia Battistelli, Laura Amicone, Giuseppe Ippolito, Vera van Noort, Alice Conigliaro, Tonino Alonzi, Marco Tripodi, Carmine Mancone

Research output: Contribution to journalArticlepeer-review

Abstract

Hepatitis C virus (HCV)-induced iron overload has been shown to promote liver fibrosis, steatosis, and hepatocellular carcinoma. The zonal-restricted histological distribution of pathological iron deposits has hampered the attempt to perform large-scale in vivo molecular investigations on the comorbidity between iron and HCV. Diagnostic and prognostic markers are not yet available to assess iron overload-induced liver fibrogenesis and progression in HCV infections. Here, by means of Spike-in SILAC proteomic approach, we first unveiled a specific membrane protein expression signature of HCV cell cultures in the presence of iron overload. Computational analysis of proteomic dataset highlighted the hepatocytic vitronectin expression as the most promising specific biomarker for iron-associated fibrogenesis in HCV infections. Next, the robustness of our in vitro findings was challenged in human liver biopsies by immunohistochemistry and yielded two major results: (i) hepatocytic vitronectin expression is associated to liver fibrogenesis in HCV-infected patients with iron overload; (ii) hepatic vitronectin expression was found to discriminate also the transition between mild to moderate fibrosis in HCV-infected patients without iron overload.

Original languageEnglish
Pages (from-to)1107-1115
Number of pages9
JournalProteomics
Volume14
Issue number9
DOIs
Publication statusPublished - 2014

Keywords

  • Biomedicine
  • Hepatic iron overload
  • Hepatitis C infection
  • Liver fibrosis
  • Vitronectin

ASJC Scopus subject areas

  • Molecular Biology
  • Biochemistry
  • Medicine(all)

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