Intranasal Immunization withToxoplasma gondiiSAG1 Induces Protective Cells into Both NALT and GALT Compartments
Open Access
- 1 February 2000
- journal article
- Published by American Society for Microbiology in Infection and Immunity
- Vol. 68 (2), 969-972
- https://doi.org/10.1128/iai.68.2.969-972.2000
Abstract
Intranasal (i.n.) immunization with the SAG1 protein ofToxoplasma gondiiplus cholera toxin (CT) provides protective immunity. The aim of this study was to analyze the cellular activation of several mucosal compartments after i.n. immunization. Cervical and mesenteric lymph node (CLN and MLN, respectively) lymphoid cell and intraepithelial lymphocyte (IEL) passive transfer experiments were performed with CBA/J mice immunized i.n. with SAG1 plus CT. CLN and MLN cells and IEL isolated 42 days after immunization conferred protective immunity on naive recipient mice challenged with strain 76KT. gondii, as assessed by the reduction in the number of brain cysts. There were proliferative specific responses in nose-associated lymphoid tissue and the CLN and MLN cells from mice immunized with SAG1 plus CT, but no cytokine was detectable. Thus, protective immunity is associated with a specific cellular response in the nasal and mesenteric compartments after i.n. immunization.Keywords
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