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  • Title: Protective monoclonal antibody against Schistosoma mansoni: antigen isolation, characterization, and suitability for active immunization.
    Author: Hazdai RT, Levi-Schaffer F, Brenner V, Horowitz S, Eshhar Z, Arnon R.
    Journal: J Immunol; 1985 Oct; 135(4):2772-9. PubMed ID: 4031500.
    Abstract:
    Monoclonal antibodies that bind to the surface of developing schistosomula were generated from the spleens of chronically infected mice that were boosted with cercarial glycoproteins. The two most reactive monoclonal antibodies, denoted 152-66-9B and 152-66-1C, were used for identification of surface antigens. The antigen detected by these monoclonal antibodies persisted on the surface of the developing larva for 72 hr posttransformation. This monoclonal antibody effected complement-mediated killing of schistosomula in vitro as efficiently as infected mouse sera. It was also very efficient in inhibiting the infectivity of both cercariae and schistosomula. The antigen reactive with the 152-66-9B monoclonal antibody contains two major polypeptides (45 and 30 KD). These polypeptide chains might have originated from the same protein, because they have the same isoelectric point in two-dimensional gel electrophoresis. Moreover, the affinity-purified antigen migrated as only one protein band of approximately 200 KD in SDS-PAGE in nonreducing conditions. The 9B antigen was isolated, purified, and used for immunization, resulting in an antigen dose-dependent partial protection against S. mansoni infection.
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