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Infect Immun, August 1998, p. 3796-3801, Vol. 66, No. 8
National Public Health Institute,
Received 19 February 1998/Returned for modification 15 April
1998/Accepted 28 April 1998
Pertussis infection is increasingly recognized in older children
and adults, indicating the need of booster immunizations in these age
groups. We investigated the induction of pertussis-specific immunity in
schoolchildren and adults after booster immunization and natural
infection. The expression of mRNA of gamma interferon (IFN-
0019-9567/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.
Cytokine mRNA Expression and Proliferative Responses Induced
by Pertussis Toxin, Filamentous Hemagglutinin, and Pertactin of
Bordetella pertussis in the Peripheral Blood Mononuclear
Cells of Infected and Immunized Schoolchildren and Adults
),
interleukin-2 (IL-2), IL-4, and IL-5 in the peripheral blood
mononuclear cells (PBMCs) was assayed by reverse transcription-PCR. The
PBMCs of 17 children immunized with one dose of an acellular vaccine
containing pertussis toxin (PT), filamentous hemagglutinin (FHA), and
pertactin (PRN) significantly proliferated in vitro after stimulation
with the vaccine antigens. The PBMCs of seven infected individuals
markedly proliferated in the presence of PT and FHA, but the cells of
only two of these subjects responded to PRN. At least one of the
antigens induced mRNA for IL-4 and/or IL-5 in the cells of 93% of
tested vaccinees and patients, and FHA induced IFN-
mRNA in the
cells of two-thirds of them. Expression of mRNA for IFN-
correlated
with the production of the cytokine protein. Anti-FHA immunoglobulin G
antibodies significantly correlated with FHA-induced proliferative
responses both before and after immunization. These results show that
booster immunization with acellular pertussis vaccine induces both
antibody- and cell-mediated immune responses in schoolchildren.
Further, booster immunization and natural infection seem to induce the
expression of mRNA of T-helper 1 (Th1) and Th2 type cytokines in
similar manners. This observation supports the use of acellular
pertussis vaccines for booster immunizations of older children,
adolescents, and adults.
*
Corresponding author. Mailing address: National Public
Health Institute, Department in Turku, Kiinamyllynkatu 13, FIN-20520 Turku, Finland. Phone: 358-2-251 9255. Fax: 358-2-251 9254. E-mail: qiuhe{at}utu.fi.
Infect Immun, August 1998, p. 3796-3801, Vol. 66, No. 8
0019-9567/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.
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