Frontiers in Genetics (Nov 2019)

Identification of an Endoglin Variant Associated With HCV-Related Liver Fibrosis Progression by Next-Generation Sequencing

  • Frédégonde About,
  • Frédégonde About,
  • Stéphanie Bibert,
  • Emmanuelle Jouanguy,
  • Emmanuelle Jouanguy,
  • Bertrand Nalpas,
  • Lazaro Lorenzo,
  • Lazaro Lorenzo,
  • Vimel Rattina,
  • Vimel Rattina,
  • Mohammed Zarhrate,
  • Sylvain Hanein,
  • Sylvain Hanein,
  • Mona Munteanu,
  • Beat Müllhaupt,
  • David Semela,
  • Nasser Semmo,
  • Jean-Laurent Casanova,
  • Jean-Laurent Casanova,
  • Jean-Laurent Casanova,
  • Jean-Laurent Casanova,
  • Jean-Laurent Casanova,
  • Ioannis Theodorou,
  • Philippe Sultanik,
  • Thierry Poynard,
  • Thierry Poynard,
  • Stanislas Pol,
  • Pierre-Yves Bochud,
  • Aurélie Cobat,
  • Aurélie Cobat,
  • Laurent Abel,
  • Laurent Abel,
  • Laurent Abel,
  • The Swiss Hepatitis C Cohort Study Group,
  • The French ANRS HC EP 26 Genoscan Study Group,
  • Francesco Negro,
  • Antoine Hadengue,
  • Laurent Kaiser,
  • Laura Rubbia-Brandt,
  • Darius Moradpour,
  • Cristina Cellerai,
  • Martin Rickenbach,
  • Andreas Cerny,
  • Gladys Martinetti,
  • Jean-François Dufour,
  • Meri Gorgievski,
  • Virginie Masserey Spicher,
  • Markus Heim,
  • Hans Hirsch,
  • Beat Helbling,
  • Stephan Regenass,
  • Raffaele Malinverni,
  • Guenter Dollenmaier,
  • Gieri Cathomas

DOI
https://doi.org/10.3389/fgene.2019.01024
Journal volume & issue
Vol. 10

Abstract

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Despite the astonishing progress in treating chronic hepatitis C virus (HCV) infection with direct-acting antiviral agents, liver fibrosis remains a major health concern in HCV infected patients, in particular due to the treatment cost and insufficient HCV screening in many countries. Only a fraction of patients with chronic HCV infection develop liver fibrosis. While there is evidence that host genetic factors are involved in the development of liver fibrosis, the common variants identified so far, in particular by genome-wide association studies, were found to have limited effects. Here, we conducted an exome association study in 88 highly selected HCV-infected patients with and without fibrosis. A strategy focusing on TGF-β pathway genes revealed an enrichment in rare variants of the endoglin gene (ENG) in fibrosis patients. Replication studies in additional cohorts (617 patients) identified one specific ENG variant, Thr5Met, with an overall odds ratio for fibrosis development in carriers of 3.04 (1.39–6.69). Our results suggest that endoglin, a key player in TGF-β signaling, is involved in HCV-related liver fibrogenesis.

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