Role of Toxoplasma gondii HSP70 and Toxoplasma gondii HSP30/bag1 in antibody formation and prophylactic immunity in mice experimentally infected with Toxoplasma gondii.
Production of antibodies against Toxoplasma gondii (T. gondii)-derived stress proteins, T. gondii HSP70 (T.g.HSP70) and T.g.HSP30/bagl, in C57BL/6 and BALB/c mice perorally infected with cysts of the avirulent Fukaya strain of T. gondii was analyzed. Production of anti-T.g.HSP70 IgG antibodies was transient, whereas production of anti-T.g.HSP30/bag1 IgG antibodies persisted after infection in both C57BL/6 and BALB/c mice. C57BL/6 mice, a susceptible strain, predominantly produced IgG antibodies specific for T.g.HSP70, whereas BALB/c mice, a resistant strain, predominantly produced IgG antibodies specific for T.g.HSP30/bag1, after T. gondii infection. Immunization with rT.g.HSP30/bag1 enhanced, whereas immunization with rT.g.HSP70 reduced host protective immunity against T. gondii infection with a cyst-forming avirulent strain, Fukaya, and a virulent strain, RH.
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Department of Parasitology, Chiba University School of Medicine, Japan.
Aosai
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Yano
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D000818:Animals; D000913:Antibodies, Protozoan / Q000097:blood; D000953:Antigens, Protozoan; D005260:Female; D006183:H-2 Antigens; D050890:HSP30 Heat-Shock Proteins; D018840:HSP70 Heat-Shock Proteins / Q000276:immunology; D006360:Heat-Shock Proteins / Q000276:immunology*; D007074:Immunoglobulin G / Q000097:blood; D008565:Membrane Proteins / Q000276:immunology; D051379:Mice; D008807:Mice, Inbred BALB C; D008810:Mice, Inbred C57BL; D015800:Protozoan Proteins / Q000276:immunology; D016052:Protozoan Vaccines; D014122:Toxoplasma / Q000276:immunology*; D014124:Toxoplasmosis, Animal / Q000401:mortality / Q000517:prevention & control*; D014611:Vaccination
D000913:Antibodies, Protozoan; D000953:Antigens, Protozoan; C106179:BAG1 protein, Toxoplasma; D006183:H-2 Antigens; D050890:HSP30 Heat-Shock Proteins; D018840:HSP70 Heat-Shock Proteins; D006360:Heat-Shock Proteins; D007074:Immunoglobulin G; D008565:Membrane Proteins; D015800:Protozoan Proteins; D016052:Protozoan Vaccines; C047168:SAG1 antigen, Toxoplasma