NDLI: Fish reovirus GCReV-109 VP33 protein elicits protective immunity in rare minnows

Content Provider	Springer Nature Link
Author	Liu, Jia Pei, Chao Gao, Xiao chan Chen, Zhong yuan Zhang, Qi Ya
Copyright Year	2015
Abstract	Grass carp reovirus strain 109 (GCReV-109) was previously isolated from a grass carp (Ctenopharyngodon idellus) with hemorrhagic disease, and its complete genome has been sequenced. However, the infectivity of GCReV-109 has not been studied, and the viral protein VP33, encoded on genome segment S11, had no detectable sequence homology to other known reovirus proteins. In this study, we characterized GCReV-109 infections in vivo and in vitro, as well as the VP33 protein. Infectivity analysis showed that GCReV-109 caused severe hemorrhagic disease and 100 % mortality at dilutions up to 10-4 in rare minnows (Gobiocypris rarus) by 8 days postinfection, but no visible cytopathic effect was observed in GCReV-109-infected subcultured grass carp muscle (GCM) cells. To confirm that GCReV-109 could be propagated in GCM cells, three virus genome segments were detected by RT-PCR, and large numbers of virus particles were observed by transmission electron microscopy in samples from the infected GCM cells. The suspension of GCReV-109-infected GCM cells was pathogenic to rare minnows. VP33 protein was expressed and purified for generation of an anti-VP33 antiserum. In western blot analysis of purified GCReV-109 particles, the antiserum specifically recognized a protein band (approximately 33 kDa). This revealed that VP33 is a major structural protein of GCReV-109 that might have immunogenic properties. The protective efficacy of the anti-VP33 antiserum against GCReV-109 infection was tested. The death of infected fish was delayed and the mortality fell to 10 % when fish were treated with the anti-VP33 antiserum, suggesting that it might be useful for the prevention and control of fish reoviral disease.
Starting Page	573
Ending Page	582
Page Count	10
File Format	PDF
ISSN	03048608
Journal	Archives of Virology
Volume Number	161
Issue Number	3
e-ISSN	14328798
Language	English
Publisher	Springer Vienna
Publisher Date	2015-11-28
Publisher Place	Vienna
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Virology Medical Microbiology Infectious Diseases
Content Type	Text
Resource Type	Article
Subject	Virology Medicine

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