Role of autophagy in Zika virus infection and pathogenesis.

Abhilash I Chiramel, Sonja M Best
Author Information
  1. Abhilash I Chiramel: Laboratory of Virology, Rocky Mountain Laboratories, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, MT, USA. Electronic address: abhilash.chiramel@nih.gov.
  2. Sonja M Best: Laboratory of Virology, Rocky Mountain Laboratories, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, MT, USA. Electronic address: sbest@niaid.nih.gov.

Abstract

Autophagy is an evolutionarily conserved cellular pathway that culminates in lysosomal degradation of selected substrates. Autophagy can serve dual roles in virus infection with either pro- or antiviral functions depending on the virus and the stage of the viral replication cycle. Recent studies have suggested a role for autophagy in Zika virus (ZIKV) replication by demonstrating the accumulation of autophagic vesicles following ZIKV infection in both in vitro and in vivo models. In human fetal neural stem cells, ZIKV inhibits Akt-mTOR signaling to induce autophagy, increase virus replication and impede neurogenesis. However, autophagy also has the potential to limit ZIKV replication, with separate studies demonstrating antiviral roles for autophagy at the maternal-placental-fetal interface, and more specifically, at the endoplasmic reticulum where virus replication is established in an infected cell. Interestingly, ZIKV (and related flaviviruses) has evolved specific mechanisms to overcome autophagy at the ER, thus demonstrating important roles for these autophagic pathways in virus replication and host response. This review summarizes the known roles of autophagy in ZIKV replication and how they might influence virus tissue tropism and disease.

Keywords

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Grants

  1. Z99 AI999999/Intramural NIH HHS
  2. ZIA AI001125/Intramural NIH HHS
  3. ZIA AI001125-01/NULL
  4. Z99 AI999999/NULL

MeSH Term

Animals
Autophagy
Female
Humans
Models, Biological
Neurogenesis
Pregnancy
Viral Proteins
Virus Replication
Zika Virus
Zika Virus Infection

Chemicals

Viral Proteins