Hepatitis C Virus Particles and Lipoprotein Metabolism

Patrice André; Gabriel Perlemuter; Agata Budkowska; Christian Bréchot; Vincent Lotteau

doi:10.1055/s-2005-864785

Seminars in Liver Disease, Table of Contents

Semin Liver Dis 2005; 25(1): 93-104
DOI: 10.1055/s-2005-864785

Hepatitis C Virus Particles and Lipoprotein Metabolism

Patrice André¹ , Gabriel Perlemuter² , Agata Budkowska³ , Christian Bréchot⁴ , Vincent Lotteau⁵

¹Professeur, INSERM, Lyon, France
²INSERM Avenir, Clarmart, France
³Chef de laboratoire, Unité des Hepacivirus, Institut Pasteur, Paris, France
⁴Professeur, Unité Mixte Pasteur/INSERM, Faculté de Médecine Necker Enfants malades, Paris, France
⁵Directeur de Recherche, INSERM, Lyon, France

Abstract

ABSTRACT

The majority of infectious hepatitis C particles are present in the low-density fractions from plasma of infected patients, suggesting an association of the virus with lipoproteins and the use of lipoprotein receptors for cell entry. Although classical hepatitis C virus (HCV) virions have been reported by some investigators, their role in the HCV life cycle has not been clearly identified. Moreover, two other forms of particles have been characterized: low-density lipo-viro-particles (LVPs) and high-density particles. The latter are nonenveloped nucleocapsids that have immunoglobulin G Fcγ binding capacity. LVPs are spherical particles enriched in triglycerides. At a minimum, they contain apolipoprotein B, HCV RNA, and core protein. The main source of LVPs is likely to be the enterocytes rather than the hepatocytes, suggesting an interaction between chylomicron and LVP assembly. In experimental systems, HCV core protein inhibits the microsomal triglyceride transfer protein, binds to apolipoprotein AII, and induces accumulation of cytoplasmic lipid droplets. A model of LVP and HCV core-lipid droplet generation is proposed.

KEYWORDS

HCV - lipoprotein - lipo-viro-particle - steatosis

Full Text

References

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Patrice AndréM.D.

Professeur, INSERM U503, IFR 128 Biosciences Lyon Gerland

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