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Area of Science:

  • Hepatology
  • Virology
  • Immunology

Background:

  • Hepatitis E virus (HEV) causes acute liver illness, but chronic infections occur in immunocompromised individuals.
  • HEV exists as quasi-enveloped (eHEV) and naked virions, with distinct roles in transmission and infection.
  • The gut-to-bloodstream entry mechanism of HEV remains poorly understood.

Purpose of the Study:

  • To review current knowledge on HEV cell entry mechanisms for both virion types.
  • To identify potential therapeutic targets for HEV infection.
  • To inform the development of personalized treatment and prevention strategies.

Main Methods:

  • This is a narrative review synthesizing existing research.
  • It discusses findings from cell culture and animal models.
  • Focuses on the distinct entry pathways of eHEV and naked HEV.

Main Results:

  • Both eHEV and naked HEV virions are infectious but utilize different cellular entry mechanisms.
  • eHEV is associated with blood and cell culture supernatants, while naked virions are found in feces and bile.
  • Understanding these distinct entry routes is key to targeting HEV.

Conclusions:

  • Deciphering HEV cell entry mechanisms is essential for public health.
  • Targeting virion-specific entry pathways offers potential for novel therapies.
  • Further research using cell culture and animal models is needed.