Contribution of 3CD Region to the Virulence of Enterovirus 71.
- Author:
Jing LI
1
,
2
;
Feng GAO
3
;
Shu Bin HAO
4
;
Dong CHENG
5
;
Wen Qiang ZHANG
5
;
Bin LIN
5
;
Li ZHAO
6
;
Xue Jie YU
1
;
Zhi Yu WANG
6
;
Hong Ling WEN
6
Author Information
- Publication Type:Journal Article
- MeSH: Animals; Cytopathogenic Effect, Viral; Enterovirus A, Human; genetics; pathogenicity; Enterovirus Infections; pathology; virology; Gene Expression Regulation, Viral; Mice; Mice, Inbred ICR; Mutation; Viral Load; Viral Proteins; genetics; metabolism; Virulence; Virus Replication
- From: Biomedical and Environmental Sciences 2017;30(10):767-771
- CountryChina
- Language:English
- Abstract: Enterovirus 71 is a neuroinvasive virus that is associated with severe neurological complications. We had earlier suggested that the replication capacity of a severe strain was higher than that of a mild strain. The recombinant 3CRV and 3CDRV virus strains were successfully rescued in our previous study. In the present study, we found no difference in virulence between 3CRV and severe strains. However, the capacity of replication and to cause cell injury of 3CDRV strain decreased in vitro, especially at 39.5 °C. Replacement of 3CD region in the severe strain led to milder symptoms, less body weight loss, and lower viral load in ICR mice. Histopathological findings indicated less severe injury in mice infected with 3CDRV strain. This study suggests that the 3CD region contributes to the attenuation of the severe strain, including its replication capacity and temperature sensitivity.
