Characterization of proteins of chicken infectious anemia virus with monoclonal antibodies. |
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Authors: | D Chandratilleke P O'Connell K A Schat |
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Institution: | Department of Avian and Aquatic Animal Medicine, College of Veterinary Medicine, Cornell University, Ithaca, New York 14850. |
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Abstract: | Eight monoclonal antibodies (MAbs) against chicken infectious anemia virus (CIAV) were developed. These MAbs identified three isolates adapted to grow in the Marek's disease chicken cell line MSB1 (Cux-1, GA-1, and Conn-B) and the chicken-propagated CIA-1 isolate. All MAbs stained MSB1 in the same way with mostly perinuclear staining, although larger nuclear inclusions and cytoplasmic staining were also detected. None of the MAbs neutralized Cux-1. All MAbs reacted in a direct enzyme-linked immunosorbent assay with Cux-1 antigen treated with 0.5% sodium dodecyl sulfate followed by extraction with chloroform, but not with MSB1 cells infected with Cux-1 or chloroform-extracts of these cells. Three viral proteins--VP1, VP2, and VP3--with estimated sizes of 45, 30, and 16 kilodaltons (kd), respectively, were immunoprecipitated using the MAbs and Cux-1-infected cell lysates. The 16-kd protein was the major VP. In addition, a 79-kd protein was detected in infected cell lysates by immunoprecipitation with CIAV-antibody-positive and -negative chicken serum, and CIAV-specific and non-specific MAbs. |
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