Retrograde axonal transport: A major transmission route of enterovirus 71 in mice

Che Szu Chen, Yi Chuan Yao, Shin Chao Lin, Yi Ping Lee, Ya Fang Wang, Jen Ren Wang, Ching Chuan Liu, Huan Yao Lei, Chun Keung Yu

Research output: Contribution to journalArticlepeer-review

123 Citations (Scopus)

Abstract

Inoculation of enterovirus 71 (EV71) by the oral (p.o.), intramuscular (i.m.), or intracranial route resulted in brain infection, flaccid paralysis, pulmonary dysfunction, and death of 7-day-old mice. The lag time of disease progression indicated that neuroinvasion from the inoculation sites was a prerequisite for the development of the clinical signs. Although EV71 p.o. inoculation led to a persistent viremia and a transient increase in blood-brain barrier permeability at the early stage of the infection, only low levels of virus, which led to neither severe infection nor clinical illness, could be detected in the brain, suggesting that hematogenous transport might not represent a major transmission route. In the spinal cord, following both p.o. and hind limb i.m. inoculation, the virus first appeared and increased rapidly in the lower segments, especially at the anterior horn areas, and then spread to the upper segments and brain in the presence of viremia. A reverse pattern, with the virus being first detected in the upper segment, was observed when the virus was i.m. inoculated in the forelimb. Colchicine, a fast axonal transport inhibitor, but not sciatic nerve transection reduced EV71 neuroinvasion in a dose-dependent manner, indicating a neuronal transmission of the virus.

Original languageEnglish
Pages (from-to)8996-9003
Number of pages8
JournalJournal of Virology
Volume81
Issue number17
DOIs
Publication statusPublished - 2007 Sep

All Science Journal Classification (ASJC) codes

  • Microbiology
  • Immunology
  • Insect Science
  • Virology

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