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EGF receptor modulates HEV entry in human hepatocytes.

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Hepatitis E virus (HEV) entry into cells is facilitated by the epidermal growth factor receptor (EGFR). Targeting EGFR offers a new strategy for developing antiviral therapies against HEV infection.

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Area of Science:

  • Virology
  • Hepatology
  • Molecular Biology

Background:

  • Hepatitis E virus (HEV) is a major cause of acute viral hepatitis, with millions of cases and thousands of deaths annually.
  • Identifying host factors for HEV entry is crucial for developing antiviral interventions, but none have been identified to date.

Purpose of the Study:

  • To identify novel host factors essential for HEV entry.
  • To investigate the role of the identified host factor in the HEV life cycle.

Main Methods:

  • RNA interference (RNAi) to silence gene expression.
  • Chemical modulation using FDA-approved drugs.
  • Ectopic expression of the epidermal growth factor receptor (EGFR).
  • Assessing HEV infection in HepaRG cells and primary human hepatocytes.

Main Results:

  • The epidermal growth factor receptor (EGFR) was identified as a critical host factor for HEV entry.
  • EGFR is essential for HEV infection, independent of viral RNA replication or assembly.
  • The ligand-binding domain of EGFR, not its signaling function, mediates the proviral effect.
  • Modulating EGF expression impacted HEV infection rates.

Conclusions:

  • EGFR is a key host factor facilitating HEV entry into cells.
  • EGFR represents a potential therapeutic target for developing novel antiviral strategies against HEV.