Passive protection against fasciolosis in mice by immunization with a monoclonal antibody (ES-78 MoAb) |
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Authors: | Marcet Ricardo Díaz Ailen Arteaga Ernesto Finlay Carlos M Sarracent Jorge |
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Affiliation: | Departamento de Parasitología, Instituto de Medicina Tropical 'Pedro Kourí', Ciudad de la Habana, Cuba. marcet@ipk.sld.cu |
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Abstract: | Recently, we reported a partial characterization of the epitope recognized by the ES-78 monoclonal antibody (MoAb). This monoclonal antibody was obtained from spleen lymphocytes of a mouse immunized with excretory-secretory antigens of Fasciola hepatica adult worms. In the present study, we report the results obtained in experiments of passive protection using this MoAb in BALB/c mice infected with 15 Fasciola hepatica metacercariae. The monoclonal antibody was able to reduce the parasite burden when administered 24 h before challenge but not when delivered 7 days after challenge. The antibody recognition of digestive tract structures in 3-week-old parasites was demonstrated by immune histochemical techniques. The antigens purified by affinity chromatography using this antibody had molecular weights of 14-20, 25-29 and 36-45 kDa and demonstrated proteinase activity similar to cathepsin L. These results suggest that the antigens carrying the epitope recognized by the ES-78 MoAb may be used as target in the protection against fasciolosis. |
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Keywords: | fasciolosis Fasciola hepatica passive protection and monoclonal antibody |
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