Changes of anti-Trypanosoma cruzi antibodies after gamma-irradiation of mice in the chronic phase of the infection.
The effect of sublethal whole body irradiation (800 rads) on the level and biological activities of antibodies in mice chronically infected with the CL strain of Trypanosoma cruzi was studied. Irradiated mice died, although a high parasitemia did not always preceded death. Before and after irradiation, a constant level of antibodies was detected by enzyme-linked immunosorbent assay and complement mediated lysis, but after irradiation the level of clearance antibodies was decreased. These results suggest that clearance antibodies are important in the control of the chronic phase of the infection.
Umekita
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LF
Laboratório de Imunopatologia, Instituto Butantan, Av. Vital Brasil 1500, CEP 05503-900, São Paulo, Brazil. umekita@amcham.com.br
Leite
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RA
Barbaro
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KC
Mota
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I
D000818:Animals; D000913:Antibodies, Protozoan / Q000097:blood* / Q000528:radiation effects; D000918:Antibody Specificity; D014355:Chagas Disease / Q000097:blood / Q000276:immunology* / Q000469:parasitology; D002908:Chronic Disease; D004307:Dose-Response Relationship, Radiation; D004797:Enzyme-Linked Immunosorbent Assay; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D018512:Parasitemia; D014349:Trypanosoma cruzi / Q000276:immunology*; D014916:Whole-Body Irradiation
D000913:Antibodies, Protozoan