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  • Title: Production and preliminary characterization of monoclonal antibodies to Actinobacillus sp isolated from epididymitis lesions in a ram.
    Author: Healey MC, Kleinschuster SJ, Gharpure HM, Johnston AV.
    Journal: Am J Vet Res; 1985 Jun; 46(6):1297-302. PubMed ID: 3896068.
    Abstract:
    A panel of 55 monoclonal antibodies to an Actinobacillus sp isolate (As8C strain) cultured from the epididymides of an infected ram was produced. Cell lines producing 5 of these antibodies were cloned and expanded by hybridoma tumor production in Balb/c mice. An isotype profile revealed that 1 cloned antibody belonged to the immunoglobulin (Ig) M class and the 4 remaining antibodies belonged to the IgG class. Within the IgG class, 1 clone produced IgG1, 1 clone produced IgG2a, and 2 clones produced IgG2b. Ascites fluid antibody titers from the cloned hybridomas ranged from 6,400 to 51,200, as determined by enzyme-linked immunosorbent assay. Specificity of the antibodies to target As8C antigens could be demonstrated by enzyme-linked immunosorbent assay inhibition. Ascites fluid from 2 clones contained antibodies that agglutinated As8C. Two additional clones produced antibodies capable of only partial agglutination, whereas 1 clone produced antibody that did not agglutinate As8C. The indirect fluorescent antibody test revealed that target antigens for at least 4 of the 5 monoclonal antibodies were most likely located on the bacterial cell surface. Antigens were extracted from As8C, using 5 surface active chemicals. An attempt to immunoprecipitate these antigens in agarose by reacting individual extracts with each of the antibodies was unsuccessful.
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