High resolution sequencing of hepatitis C virus reveals limited intra-hepatic compartmentalization in end stage liver disease

Peter Balfe, Jane McKeating, Ditte Hedegaard, Gary Reynolds, Ke Hu, Annika Wilhelm, Deidre Kelly

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)
182 Downloads (Pure)

Abstract

Background and Aims: The high replication and mutation rate of hepatitis C virus (HCV) results in a heterogeneous population of viral sequences in vivo. HCV replicates in the liver and infected hepatocytes occur as foci surrounded by uninfected cells that may promote compartmentalization of viral variants. Given recent reports showing interferon stimulated gene (ISG) expression in chronic hepatitis C, we hypothesized that local interferon responses may limit HCV replication and evolution. Methods: To investigate the spatial influence of liver architecture on viral replication we measured HCV RNA and ISG mRNA from each of the 8 Couinaud segments of the liver from 21 patients undergoing liver transplant. Results: HCV RNA and ISG mRNA levels were comparable across all sites from an individual liver but showed up to 500-fold difference between patients. Importantly, there was no association between ISG and HCV RNA expression across all sites in the liver or plasma. Deep sequencing of HCV RNA isolated from the 8 hepatic sites from two subjects showed a similar distribution of viral quasispecies across the liver and uniform sequence diversity. Single genome amplification of HCV E1E2-envelope clones from 6 selected patients at 2 hepatic sites supported these data and showed no evidence for HCV compartmentalization. Conclusions: We found no differences between the hepatic and plasma viral quasispecies in all patients sampled. We conclude that in end- stage liver disease HCV RNA levels and the genetic pool of HCV envelope sequences are indistinguishable between distant sites in the liver and plasma, arguing against viral compartmentalization.
Original languageEnglish
Pages (from-to)28-38
Number of pages11
JournalJournal of Hepatology
Volume66
Early online date13 Aug 2016
DOIs
Publication statusPublished - 1 Jan 2017

Keywords

  • Hepatitis C
  • ESLD
  • Evolution
  • Compartmentalization
  • Innate Immunity

ASJC Scopus subject areas

  • General Immunology and Microbiology
  • Virology
  • Immunology
  • Hepatology
  • Infectious Diseases
  • Transplantation
  • Microbiology (medical)
  • Oncology

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