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  • Title: Single gene substitution rotavirus reassortants containing the major neutralization protein (VP7) of human rotavirus serotype 4.
    Author: Midthun K, Hoshino Y, Kapikian AZ, Chanock RM.
    Journal: J Clin Microbiol; 1986 Nov; 24(5):822-6. PubMed ID: 3021814.
    Abstract:
    A series of reassortants was isolated from coinfection of cell cultures with wild-type bovine rotavirus (UK strain [serotype 6]) or rhesus rotavirus (strain MMU18006 [serotype 3]) and a tissue culture-adapted human rotavirus strain, ST3 (serotype 4). Monospecific antiserum or a set of monoclonal antibodies to the major outer capsid neutralization glycoprotein, VP7, of the animal rotavirus parent was used to select for reassortants with human rotavirus serotype 4 neutralization specificity. The majority of reassortants contained only gene 9 of the human rotavirus parent, ST3, whereas the remaining genes were derived from the animal rotavirus parent. These single human rotavirus gene substitution reassortants were neutralized to high titer by hyperimmune serum directed at ST3, thus demonstrating that gene 9 of ST3 codes for the major neutralization protein of this strain. Moreover, these single gene substitution, reassortants were also neutralized to low titer by antiserum directed at their animal rotavirus parent, probably because they derived gene 4, which codes for another outer capsid protein, VP3, from their animal rotavirus parent. None of the reassortants derived gene 4, which had previously been shown to be responsible for host range restriction of human rotaviruses in tissue culture, from ST3, despite the fact that the ST3 strain used for gene reassortment had been tissue culture adapted.
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