Autophagy is induced and supports virus replication in Enterovirus A71-infected human primary neuronal cells

Sci Rep. 2020 Sep 17;10(1):15234. doi: 10.1038/s41598-020-71970-3.

Abstract

Enterovirus A71 (EV-A71), which belongs to the family Picornaviridae, can invade the central nervous system (CNS) and cause severe CNS complications or death. The EV-A71 antigen has been detected in the neurons in the brains of humans who died from EV-A71 infection. However, the effect of EV-A71 infection on human neuronal cells remains poorly understood. Human neural stem cells (NSCs) and IMR-32 neuroblastoma cells were differentiated into neuronal cells for this study. Although the neuronal cells were permissive to EV-A71 infection, EV-A71 infection did not induce an obvious cytopathic effect on the neuronal cells. EV-A71 infection did not induce apoptosis in neuronal cells. However, autophagy and autophagic flux were induced in EV-A71-infected neuronal cells. The production of autophagosomes was shown to be important for EV-A71 viral RNA (vRNA) replication in neuronal cells.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Autophagosomes / virology
  • Autophagy / physiology
  • Caspases / metabolism
  • Cell Differentiation
  • Cells, Cultured
  • Cytopathogenic Effect, Viral / physiology
  • Enterovirus A, Human / genetics
  • Enterovirus A, Human / pathogenicity*
  • Enterovirus A, Human / physiology*
  • Enzyme Activation
  • Host Microbial Interactions / physiology
  • Humans
  • Neural Stem Cells / metabolism
  • Neural Stem Cells / pathology
  • Neural Stem Cells / virology
  • Neurons / metabolism
  • Neurons / pathology
  • Neurons / virology*
  • RNA, Viral / biosynthesis
  • RNA, Viral / genetics
  • Virus Replication / physiology

Substances

  • RNA, Viral
  • Caspases