Hepatitis C virus alters the morphology and function of peroxisomes

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  • Esther Martin de Fourchambault
  • Nathalie Callens
  • Jean Michel Saliou
  • Marie Fourcot
  • Oceane Delos
  • Nicolas Barois
  • Quentin Thorel
  • Ramirez Almeida, Santseharay
  • Bukh, Jens
  • Laurence Cocquerel
  • Justine Bertrand-Michel
  • Guillemette Marot
  • Yasmine Sebti
  • Jean Dubuisson
  • Yves Rouillé

Despite the introduction of effective treatments for hepatitis C in clinics, issues remain regarding the liver disease induced by chronic hepatitis C virus (HCV) infection. HCV is known to disturb the metabolism of infected cells, especially lipid metabolism and redox balance, but the mechanisms leading to HCV-induced pathogenesis are still poorly understood. In an APEX2-based proximity biotinylation screen, we identified ACBD5, a peroxisome membrane protein, as located in the vicinity of HCV replication complexes. Confocal microscopy confirmed the relocation of peroxisomes near HCV replication complexes and indicated that their morphology and number are altered in approximately 30% of infected Huh-7 cells. Peroxisomes are small versatile organelles involved among other functions in lipid metabolism and ROS regulation. To determine their importance in the HCV life cycle, we generated Huh-7 cells devoid of peroxisomes by inactivating the PEX5 and PEX3 genes using CRISPR/Cas9 and found that the absence of peroxisomes had no impact on replication kinetics or infectious titers of HCV strains JFH1 and DBN3a. The impact of HCV on peroxisomal functions was assessed using sub-genomic replicons. An increase of ROS was measured in peroxisomes of replicon-containing cells, correlated with a significant decrease of catalase activity with the DBN3a strain. In contrast, HCV replication had little to no impact on cytoplasmic and mitochondrial ROS, suggesting that the redox balance of peroxisomes is specifically impaired in cells replicating HCV. Our study provides evidence that peroxisome function and morphology are altered in HCV-infected cells.

Original languageEnglish
Article number1254728
JournalFrontiers in Microbiology
Volume14
ISSN1664-302X
DOIs
Publication statusPublished - 2023

Bibliographical note

Publisher Copyright:
Copyright © 2023 Martin de Fourchambault, Callens, Saliou, Fourcot, Delos, Barois, Thorel, Ramirez, Bukh, Cocquerel, Bertrand-Michel, Marot, Sebti, Dubuisson and Rouillé.

    Research areas

  • APEX2, CRISPR-Cas9, HCV genotype, hepatitis C virus, peroxisome, proximity biotinylation, ROS

ID: 373888556