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  • Title: Monoclonal antibody produced against partially purified sporozoite antigen inhibits invasion of cells by sporozoites of avian Eimeria species.
    Author: Augustine PC.
    Journal: Proc Soc Exp Biol Med; 1991 Oct; 198(1):606-11. PubMed ID: 1909794.
    Abstract:
    Previous studies showed that molecules of in vitro-cultured primary turkey kidney cells bound to 23-, 40-, and 60- to 65-kDa antigens of sodium dodecyl sulfate-solubilized sporozoites of Eimeria adenoeides. Similar binding to antigens of three other species of avian Eimeria, E. tenella, E. acervulina, and E. meleagrimitis, is now reported. Strips containing the most avidly bound sporozoite antigen (approximately 40 kDa) were excised from the sodium dodecyl sulfate-polyacrylamide gels on which E. adenoeides antigens had been electrophoretically separated. The strips were homogenized and injected into mice to produce hybridoma cell lines. Twelve cell lines secreting monoclonal antibodies (McAb) that reacted with E. adenoeides sporozoites were detected. One of these McAb, H11C3, reacted with structures in the anterior tip of sporozoites of E. adenoeides and five other species of avian Eimeria. When included in the inoculation medium, this McAb significantly inhibited invasion of cultured kidney cells by sporozoites of E. adenoeides and E. tenella. In contrast, when the sporozoites were pretreated with McAb H11C3 and then washed free of the antibody, no inhibition of invasion was observed.
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