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Infection and Immunity, February 2000, p. 969-972, Vol. 68, No. 2
Equipe Associée INRA d'Immunologie
Parasitaire-EA 2637, UFR des Sciences Pharmaceutiques, 37200 Tours,
France
Received 21 July 1999/Returned for modification 20 October
1999/Accepted 10 November 1999
Intranasal (i.n.) immunization with the SAG1 protein of
Toxoplasma gondii plus 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 76K
T. 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.
0019-9567/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.
Intranasal Immunization with Toxoplasma
gondii SAG1 Induces Protective Cells into Both NALT and GALT
Compartments
*
Corresponding author. Mailing address: Equipe
Associée INRA d'Immunologie Parasitaire-EA 2637, UFR des
Sciences Pharmaceutiques, 31 avenue Monge, 37200 Tours, France. Phone:
33 02 47 36 71 86. Fax: 33 02 47 36 72 52. E-mail:
velge{at}univ-tours.fr.
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