A functional genomic screen identifies cellular cofactors of hepatitis C virus replication

Cell Host Microbe. 2009 Mar 19;5(3):298-307. doi: 10.1016/j.chom.2009.02.001.


Hepatitis C virus (HCV) chronically infects 3% of the world's population, and complications from HCV are the leading indication for liver transplantation. Given the need for better anti-HCV therapies, one strategy is to identify and target cellular cofactors of the virus lifecycle. Using a genome-wide siRNA library, we identified 96 human genes that support HCV replication, with a significant number of them being involved in vesicle organization and biogenesis. Phosphatidylinositol 4-kinase PI4KA and multiple subunits of the COPI vesicle coat complex were among the genes identified. Consistent with this, pharmacologic inhibitors of COPI and PI4KA blocked HCV replication. Targeting hepcidin, a peptide critical for iron homeostasis, also affected HCV replication, which may explain the known dysregulation of iron homeostasis in HCV infection. The host cofactors for HCV replication identified in this study should serve as a useful resource in delineating new targets for anti-HCV therapies.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Antimicrobial Cationic Peptides / antagonists & inhibitors
  • Antimicrobial Cationic Peptides / genetics
  • Cell Line
  • Coat Protein Complex I / antagonists & inhibitors
  • Coat Protein Complex I / genetics
  • Gene Knockdown Techniques
  • Genes, Reporter
  • Hepacivirus / physiology*
  • Hepcidins
  • Host-Pathogen Interactions*
  • Humans
  • Minor Histocompatibility Antigens
  • Phosphotransferases (Alcohol Group Acceptor) / antagonists & inhibitors
  • Phosphotransferases (Alcohol Group Acceptor) / genetics
  • RNA, Small Interfering / genetics
  • Virus Replication*


  • Antimicrobial Cationic Peptides
  • Coat Protein Complex I
  • HAMP protein, human
  • Hepcidins
  • Minor Histocompatibility Antigens
  • RNA, Small Interfering
  • Phosphotransferases (Alcohol Group Acceptor)
  • phosphatidylinositol phosphate 4-kinase