Journal
VACCINE
Volume 18, Issue 22, Pages 2323-2330Publisher
ELSEVIER SCI LTD
DOI: 10.1016/S0264-410X(00)00024-4
Keywords
human; nasal pertussis vaccine; T cell proliferation
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We have studied the ability of an intranasally administered whole-cell pertussis vaccine (WCP) without adjuvant to induce antigen-specific T cell responses in humans. Six adult volunteers were given a vaccine dose (corresponding to 250 mu g protein) by nasal spray four times at weekly intervals, and peripheral blood mononuclear cells were assayed for antigen-specific proliferative T cell responses. All six vaccinees had a WCP-specific response, which in four of them remained elevated throughout the 2 month study. All participants also responded to the filamentous haemagglutinin (FHA) antigen, and four of them responded to inactivated pertussis toxin (PTd). A significant correlation between T cell proliferation against WCP and WCP-specific IgA antibody levels in nasal secretions was observed. This demonstrates that intranasal administration of a non-proliferating bacterial vaccine without any additional mucosal adjuvant can induce vaccine-specific T cell responses related to mucosal IgA secretion. (C) 2000 Elsevier Science Ltd. All rights reserved.
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