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The influence of cholesterol and lipid metabolism on host cell structure and hepatitis C virus replication

Academic Article
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Overview

authors

  • Sagan, S. M.
  • Rouleau, Y.
  • Leggiadro, C.
  • Supekova, L.
  • Schultz, Peter
  • Su, Andrew
  • Pezacki, J. P.

publication date

  • February 2006

journal

  • Biochemistry and Cell Biology-Biochimie Et Biologie Cellulaire  Journal

abstract

  • The hepatitis C virus (HCV) replicates on a membrane protein complex composed of viral proteins, replicating RNA, and altered cellular membranes. Small-molecule inhibitors of cellular lipid-cholesterol metabolism such as 25-hydroxycholesterol, cerulenin, lovastatin, and GGTI-286 all show a negative effect on HCV replication. Perturbation of host cell lipid and cholesterol metabolism can disrupt replication complexes by altering membranous structures where replication occurs. Changes in cholesterol and (or) lipid composition can have a general effect on membrane structure. Alternatively, metabolic changes can exert a more subtle influence over replication complexes by altering localization of host proteins through alterations in lipid anchoring. Here, we use Huh-7 cells harboring subgenomic HCV replicons to demonstrate that 25-hydroxycholesterol, cerulenin, lovastatin, and GGTI-286 do not disrupt the membranous web where replication occurs, whereas cholesterol-depleting agents such as beta-cyclodextrin do. Cellular imaging suggests that the HCV RNA can remain associated with subcellular compartments connected with replication complexes in the presence of metabolic inhibitors. Therefore, at least 2 different molecular mechanisms are possible for the inhibition of HCV replication through the modulation of cellular lipid and cholesterol metabolism.

subject areas

  • Anticholesteremic Agents
  • Carcinoma, Hepatocellular
  • Cells, Cultured
  • Cellular Structures
  • Cholesterol
  • Genome, Viral
  • Hepacivirus
  • Host-Parasite Interactions
  • Humans
  • Hydroxycholesterols
  • Lipid Metabolism
  • Lipids
  • RNA, Viral
  • Replicon
  • Virus Replication
  • beta-Cyclodextrins
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Research

keywords

  • electron microscopy
  • fluorescence microscopy
  • hepatitis C virus
  • lipid metabolism
  • membranous web
  • statins
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Identity

International Standard Serial Number (ISSN)

  • 0829-8211

Digital Object Identifier (DOI)

  • 10.1139/o05-149

PubMed ID

  • 16462891
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Additional Document Info

start page

  • 67

end page

  • 79

volume

  • 84

issue

  • 1

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