Volume 28, Issue 7 pp. 1078-1090
ORIGINAL ARTICLE

Variability in molecular characteristics of Hepatitis E virus quasispecies could modify viral surface properties and transmission

Cédric Hartard

Cédric Hartard

Laboratoire de Virologie, CHRU de Nancy Brabois, Vandoeuvre-lès-Nancy, France

Université de Lorraine, CNRS, LCPME, Nancy, France

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Honorine Fenaux

Honorine Fenaux

Laboratoire de Virologie, CHRU de Nancy Brabois, Vandoeuvre-lès-Nancy, France

Université de Lorraine, CNRS, LCPME, Nancy, France

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Alexis Gentilhomme

Alexis Gentilhomme

Laboratoire de Virologie, CHRU de Nancy Brabois, Vandoeuvre-lès-Nancy, France

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John M. Murray

John M. Murray

School of Mathematics and Statistics, UNSW Sydney, Sydney, NSW, Australia

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Elma Akand

Elma Akand

School of Mathematics and Statistics, UNSW Sydney, Sydney, NSW, Australia

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Elodie Laugel

Elodie Laugel

Laboratoire de Virologie, CHRU de Nancy Brabois, Vandoeuvre-lès-Nancy, France

Université de Lorraine, CNRS, LCPME, Nancy, France

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Sibel Berger

Sibel Berger

Laboratoire de Virologie, CHRU de Nancy Brabois, Vandoeuvre-lès-Nancy, France

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Armand Maul

Armand Maul

LIEC (Laboratoire Interdisciplinaire des Environnements Continentaux), Université de Lorraine, CNRS, Metz, France

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Alexis de Rougemont

Alexis de Rougemont

CHU de Dijon, Centre national de référence des virus entériques, Dijon, France

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Hélène Jeulin

Hélène Jeulin

Laboratoire de Virologie, CHRU de Nancy Brabois, Vandoeuvre-lès-Nancy, France

Université de Lorraine, CNRS, LCPME, Nancy, France

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Thomas Remen

Thomas Remen

DRCI, Délégation à la Recherche Clinique et à l'Innovation, Unité de Méthodologie, Data Management et Statistique, CHRU de Nancy Brabois, Vandoeuvre-lès-Nancy, France

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Mouni Bensenane

Mouni Bensenane

Service d'hépato-gastro-entérologie, CHRU de Nancy Brabois, Vandoeuvre-lès-Nancy, France

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Jean-Pierre Bronowicki

Jean-Pierre Bronowicki

Service d'hépato-gastro-entérologie, CHRU de Nancy Brabois, Vandoeuvre-lès-Nancy, France

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Christophe Gantzer

Christophe Gantzer

Université de Lorraine, CNRS, LCPME, Nancy, France

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Isabelle Bertrand

Isabelle Bertrand

Université de Lorraine, CNRS, LCPME, Nancy, France

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Evelyne Schvoerer

Corresponding Author

Evelyne Schvoerer

Laboratoire de Virologie, CHRU de Nancy Brabois, Vandoeuvre-lès-Nancy, France

Université de Lorraine, CNRS, LCPME, Nancy, France

Correspondence

Evelyne Schvoerer, Laboratoire de Virologie-CHRU de Nancy Brabois, Rue Morvan, 54511 Vandoeuvre-lès-Nancy, France.

Email: [email protected]

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First published: 20 April 2021
Citations: 1

Cédric Hartard and Honorine Fenaux contributed equally to this work.

Abstract

Hepatitis E virus (HEV) usually causes self-limited liver diseases but can also result in severe cases. Genotypes 1 (G1) and 2 circulate in developing countries are human-restricted and waterborne, while zoonotic G3 and G4 circulating in industrialized countries preferentially infect human through consumption of contaminated meat. Our aims were to identify amino acid patterns in HEV variants that could be involved in pathogenicity or in transmission modes, related to their impact on antigenicity and viral surface hydrophobicity. HEV sequences from human (n = 37) and environmental origins (wild boar [n = 3], pig slaughterhouse effluent [n = 6] and urban wastewater [n = 2]) were collected for the characterization of quasispecies using ultra-deep sequencing (ORF2/ORF3 overlap). Predictive and functional assays were carried out to investigate viral particle antigenicity and hydrophobicity. Most quasispecies showed a major variant while a mixture was observed in urban wastewater and in one chronically infected patient. Amino acid signatures were identified, as a rabbit-linked HEV pattern in two infected patients, or the S68L (ORF2) / H81C (ORF3) residue mostly identified in wild boars. By comparison with environmental strains, molecular patterns less likely represented in humans were identified. Patterns impacting viral hydrophobicity and/or antigenicity were also observed, and the higher hydrophobicity of HEV naked particles compared with the enveloped forms was demonstrated. HEV variants isolated from human and environment present molecular patterns that could impact their surface properties as well as their transmission. These molecular patterns may concern only one minor variant of a quasispecies and could emerge under selective pressure.

CONFLICT OF INTEREST

All authors report no conflicts of interest.

DATA AVAILABILITY STATEMENT

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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