Abstract：
:Tissue culture adaptation of infectious bursal disease virus (IBDV) results in alternation of three residues on its major capsid protein VP2 and these residues may engage in receptor binding. Although the key of successful infection of tissue culture adapted IBDV in tissue cultures was defined as the virus entering steps, mechanism of the adaptation is poorly understood. In this study, recombinant VP2s of an attenuated strain (D78) and a very virulent strain (HK46) of IBDV tagged with rabbit immunoglobulin G heavy chain were expressed in mammalian cells, generating RAVP2 and RVVP2, respectively, in high purity. Using flow cytometry, both RAVP2 and RVVP2 were demonstrated to bind with Vero cells while these bindings were blocked by D78 viral particles, implying both very virulent IBDVs (vvIBDVs) and attenuated IBDVs bind to Vero cells through the same receptor(s). Since vvIBDVs cannot be propagated directly in tissue cultures, the specific binding between RVVP2 and Vero cells suggests the barrier for tissue culture adaptation may be beyond the virus attachment process.
journal_name
Virus Resjournal_title
Virus researchauthors
Yip CW,Yeung YS,Ma CM,Lam PY,Hon CC,Zeng F,Leung FCdoi
10.1016/j.virusres.2006.08.001subject
Has Abstractpub_date
2007-01-01 00:00:00pages
50-6issue
1eissn
0168-1702issn
1872-7492pii
S0168-1702(06)00253-Xjournal_volume
123pub_type
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