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Virus Res. 2014 Aug 30;189:1-7. doi: 10.1016/j.virusres.2014.04.014. Epub 2014 May 1.

Association of viral replication capacity with the pathogenicity of enterovirus 71.

Author information

  • 1Department of Virology, School of Public Health, Shandong University, Jinan, Shandong 250012, People's Republic of China.
  • 2Laiwu City Center for Disease Control and Prevention, Shandong Province 271100, People's Republic of China.
  • 3Shanghai City Center for Disease Control and Prevention, Shanghai 200336, People's Republic of China.
  • 4Shandong Medical Equipment Quality Supervision and Inspection Center, Jinan, Shandong 250101, People's Republic of China.
  • 5Department of Virology, School of Public Health, Shandong University, Jinan, Shandong 250012, People's Republic of China. Electronic address: wenhongling@sdu.edu.cn.

Abstract

Enterovirus 71 (EV71) is a major cause of hand-foot-and-mouth disease, which is associated with fatal neurological disease. The mechanism of EV71 pathogenesis remains obscure. We compared the replication capacity of the severe and mild enterovirus 71 isolates. The replication kinetics of EV71 in RD cells and ICR mice was determined by qRT-PCR. The lung, muscular, brain, intestine tissues were used for histopathological and immunohistochemical assays. The growth curves of EV71 strains in RD cells showed that the severe EV71 strains (SDLY107 and SDLY52) replicated faster and generated more viral RNA than the mild EV71 strains (SDLY11 and SDLY1). The mice infected by the severe EV71 strains (SDLY107) showed more severe clinical symptoms, pathological changes and higher viral load than the mice infected by the mild EV71 strains (SDLY11). These results suggest that there was a difference in replication capacity between the severe and mild EV71 strains, which was possibly associated with EV71 pathogenesis.

Copyright © 2014 Elsevier B.V. All rights reserved.

KEYWORDS:

EV71; Pathogenicity; Replication

PMID:
24792876
[PubMed - indexed for MEDLINE]
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