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. 1983;2(2):193–198. doi: 10.1002/j.1460-2075.1983.tb01404.x

Anti-schistosome monoclonal antibodies of different isotypes--correlation with cytotoxicity.

S Horowitz 1, R Tarrab-Hazdai 1, Z Eshhar 1, R Arnon 1
PMCID: PMC555112  PMID: 11894925

Abstract

Five monoclonal antibodies specific towards Schistosoma mansoni antigens were prepared by fusion of spleen cells of infected and immunized mouse with the murine myeloma NS-1 cells. Three of the five antibodies belonged to the IgG1 class, one was an IgM and the fifth one was an IgE. The IgE monoclonal antibody designated 54.10, induced antigen-specific degranulation of rat basophilic cell line, a property which served as the basis for the screening assay. Its biological function was demonstrated by a specific macrophage activation that led to killing of schistosomula; no such killing was obtained with anti-schistosome antibodies of other classes or with IgE of different antigenic specificity. The second monoclonal antibody of biological significance was an IgG1, designated 27.21 which is reactive in the immunofluorescence staining of surface antigens on intact schistosomula. All three monoclonal antibodies that belonged to the IgG1 class were effective in mediating killing of schistosomula by complement, with the highest effect exerted by 27.21. It is thus apparent that the 27.21 monoclonal antibody is directed against a densely distributed surface antigen on the schistosomula membrane which is possibly involved in the protective immunity. Preliminary data showed that immunoprecipitation with the 27.21 antibodies results in the isolation of three major protein bands, of 60 kd, 50 kd, 19 kd, respectively.

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Selected References

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