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*Syphilis

The Journal of Immunology, Vol 141, Issue 12 4363-4369, Copyright © 1988 by American Association of Immunologists

ARTICLES

Development of cellular immunity to individual soluble antigens of Treponema pallidum during experimental syphilis

SA Baker-Zander, MJ Fohn and SA Lukehart
Department of Medicine, School of Medicine, University of Washington, Seattle 98195.

The contribution of individual specific molecules of Treponema pallidum subspecies pallidum to cellular immunity in experimental syphilis was evaluated by combining the techniques of Ag identification and purification with the lymphocyte proliferation assay. Proliferative responses of splenic lymphocytes from syphilitic rabbits to complex treponemal Ag and Con A were vigorous throughout the course of intratesticular infection (6, 10, 17, 30, and 210 days). Normal rabbits did not respond to any treponemal preparations and all rabbits failed to respond to normal rabbit testicular Ag (NRT). Seven defined treponemal Ag (47 kDa, 37 kDa, 35, 33-kDa, 30-kDa, 14 kDa, and 12 kDa) stimulated lymphocytes from infected rabbits. Cellular responses to the 37-kDa and 30-kDa fractions were evident by day 6 of infection and responses to the 35, 33-kDa and 14-kDa Ag were first detected on day 10; responsiveness to these Ag continued throughout the observation period. Cellular responses to the 47-kDa molecule were detectable but lower when compared with other individual Ag. Responsiveness to the 12- kDa Ag was not evident until 7 mo postinfection. Specific immunoblot reactivity of serum from rabbits used in this study generally correlated with the development of cellular reactivity to individual Ag of T. pallidum.


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