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The VP5 protein of infectious bursal disease virus promotes virion release from infected cells and is not involved in cell death

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Abstract

The VP5 protein of infectious bursal disease virus (IBDV) was shown in previous reports to be involved in the cytopathogenicity of IBDV. Here, using a rescued VP5-deficient IBDV infectious clone, it was demonstrated that a lack of VP5 expression significantly hinders the release of viral progeny from infected cells but does not block intracellular virus production. Monoclonal VP5-expressing Vero cells did not exhibit induction of cell death. Using VP5-specific mAbs generated in our laboratory as a tool, it was shown by flow cytometry analysis that VP5 was detectable on the surface of IBDV-infected and monoclonal VP5-expressing Vero cells and bursal cells in IBDV-infected chickens. Taken together, these data suggest that the VP5 protein is involved in regulation of the release of intracellular IBDV virions and may be used as a cell-surface marker for detecting IBDV-infected cells in FCM analysis. This study contributes to the further characterization of the VP5 protein, which will allow a better understanding of the mechanism of IBDV pathogenicity.

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Acknowledgments

This work was supported by grants from the National Key Technology R & D Program of China (Grant 2006BAD06A04), from the National Key Basic Research Program of China (Grant 2005CB523203), from the National Natural Science Foundation of China (Grant No. 30625030, 30870117) and from the National Modern Agro-Industry Technology Research System of China.

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Authors and Affiliations

  1. Key Laboratory of Animal Epidemic Etiology & Immunological Prevention, Ministry of Agriculture, Zhejiang University, 310029, Hangzhou, Zhejiang, People’s Republic of China

    Yongping Wu, Lianlian Hong, Juxiu Ye, Zhenyu Huang & Jiyong Zhou

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  1. Yongping Wu
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  2. Lianlian Hong
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  3. Juxiu Ye
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  4. Zhenyu Huang
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  5. Jiyong Zhou
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Correspondence to Jiyong Zhou.

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Y. Wu and L. Hong contributed equally to this work.

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Wu, Y., Hong, L., Ye, J. et al. The VP5 protein of infectious bursal disease virus promotes virion release from infected cells and is not involved in cell death. Arch Virol 154, 1873–1882 (2009). https://doi.org/10.1007/s00705-009-0524-4

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  • DOI: https://doi.org/10.1007/s00705-009-0524-4

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