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  • Title: A genetically engineered cell line resistant to subgroup J avian leukosis virus infection (C/J).
    Author: Hunt HD, Lee LF, Foster D, Silva RF, Fadly AM.
    Journal: Virology; 1999 Nov 10; 264(1):205-10. PubMed ID: 10544146.
    Abstract:
    A cell line (DF-1¿J) expressing the envelope protein isolated from the ADOL-Hc1 strain of the avian leukosis virus subgroup J (ALV-J) was used to analyze receptor interference to six different isolates of ALV-J as well as ALV subgroups A-D. The traditional gag-specific enzyme-linked immunosorbent assay (ELISA) as well as flow cytometry was used to evaluate viral infection. The parental cell line (DF-1) was susceptible to all ALV subgroups tested while the DF-1¿J cell line was selectively resistant to the subgroup J isolates. The DF-1¿J cell line was resistant to infection by all six ALV-J isolates as determined using the gag-specific ELISA. There was no interference with the other ALV subgroups (A-D) induced by the expression of the ADOL-Hcl envelope. The ALV-J isolates used in this analysis are serologically distinct when analyzed by flow cytometry. Convalescent sera to ADOL-Hcl cross-reacts with all of the ALV-J isolates tested; however, sera to HPRS-103 did not bind to four of the six isolates. Based on the intensity and differential binding of these antisera using flow cytometry, the six ALV-J isolates used can be grouped into four categories. Thus the DF-1¿J cell line is resistant to infection by a serologically and genetically diverse group of ALV-J isolates and should be useful as a diagnostic tool.
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