Viruses (Apr 2021)

Genetic Determinants in a Critical Domain of NS5A Correlate with Hepatocellular Carcinoma in Cirrhotic Patients Infected with HCV Genotype 1b

  • Mohammad Alkhatib,
  • Velia Chiara Di Maio,
  • Valentina De Murtas,
  • Ennio Polilli,
  • Martina Milana,
  • Elisabetta Teti,
  • Gianluca Fiorentino,
  • Vincenza Calvaruso,
  • Silvia Barbaliscia,
  • Ada Bertoli,
  • Rossana Scutari,
  • Luca Carioti,
  • Valeria Cento,
  • Maria Mercedes Santoro,
  • Alessandro Orro,
  • Ivana Maida,
  • Ilaria Lenci,
  • Loredana Sarmati,
  • Antonio Craxì,
  • Caterina Pasquazzi,
  • Giustino Parruti,
  • Sergio Babudieri,
  • Luciano Milanesi,
  • Massimo Andreoni,
  • Mario Angelico,
  • Carlo Federico Perno,
  • Francesca Ceccherini-Silberstein,
  • Valentina Svicher,
  • Romina Salpini,
  • on behalf of HIRMA (Hepatocarcinoma Innovative Research MArkers) and Fondazione Vironet C (HCV Virology Italian Resistance

DOI
https://doi.org/10.3390/v13050743
Journal volume & issue
Vol. 13, no. 5
p. 743

Abstract

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HCV is an important cause of hepatocellular carcinoma (HCC). HCV NS5A domain-1 interacts with cellular proteins inducing pro-oncogenic pathways. Thus, we explore genetic variations in NS5A domain-1 and their association with HCC, by analyzing 188 NS5A sequences from HCV genotype-1b infected DAA-naïve cirrhotic patients: 34 with HCC and 154 without HCC. Specific NS5A mutations significantly correlate with HCC: S3T (8.8% vs. 1.3%, p = 0.01), T122M (8.8% vs. 0.0%, p p p 1 of them independently correlates with HCC (OR (95%CI): 21.8 (5.7–82.3); p p = 0.02) and lower ALT (35 (30–71) vs. 83 (48–108) U/L, p = 0.004), suggesting a role in enhancing viral fitness without affecting necroinflammation. Notably, these mutations reside in NS5A regions known to interact with cellular proteins crucial for cell-cycle regulation (p53, p85-PIK3, and β-catenin), and introduce additional phosphorylation sites, a phenomenon known to ameliorate NS5A interaction with cellular proteins. Overall, these results provide a focus for further investigations on molecular bases of HCV-mediated oncogenesis. The role of theseNS5A domain-1 mutations in triggering pro-oncogenic stimuli that can persist also despite achievement of sustained virological response deserves further investigation.

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