Abstract
The viral protein 22 (VP22) in the tegument of Marek’s disease virus serotype 1 (MDV-1) plays an important role in cell-to-cell spread and viral propagation. Antiserum against the carboxyl terminus of VP22 was prepared by immunizing mice with recombinant VP22 expressed in E. coli, and used to investigate its expression in chicken embryo fibroblast (CEF) cells infected with different MDV-1 strains. At an infection dose of PFU=50, intercellular trafficking of the VP22 into the nuclei of the surrounding receipt cells was detected as early as 3 hours post infection. By 6 hours after infection (before viral plague formation), the protein was detected in the whole nuclei of the recipient cells with no difference among MDV-1 strains CVI988/Rispens, GA and RB1B. Intra-nuclear accumulation of the VP22 protein was further increased when the viral plagues started to form. These results indicate that, albeit the existence of the 201TKSERT206 deletion, the VP22 of the CVI988/Rispens vaccine strain has also intercelular-trafficking function, which might serve as a potential alternative delivering protein instead of virulent strains VP22.
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Supported by the National Natural Science Foundation of China (Grant No. 30371070)
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Chen, H., Song, C., Qin, A. et al. Expression and intercellular trafficking of the VP22 protein of CVI988/Rispens vaccine strain of Marek’s disease virus. SCI CHINA SER C 50, 75–79 (2007). https://doi.org/10.1007/s11427-007-2038-1
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DOI: https://doi.org/10.1007/s11427-007-2038-1