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Immunogenicity and protective efficacy of neonatal vaccination against Bordetella pertussis in a murine model: evidence for early control of pertussis

Bozzotti, Paola
Mielcarek, Nathalie
Locht, Camille
Published in Infection and Immunity. 2002, vol. 70, no. 7, p. 3521-8
Abstract A significant resurgence of early cases of pertussis is being observed in infants too young to have yet completed their three-dose vaccination schedule. In this study, murine models of immunization and Bordetella pertussis challenge were adapted to early life. This allowed comparative evaluation of immunogenicity and protective efficacy of immunization initiated in the neonatal period (7-day-old mice) or in infancy (3-week-old mice) with diphtheria-tetanus-whole-cell pertussis (DTPw) and diphtheria-tetanus-acellular pertussis (DTPa) vaccines. Neonatal DTPa vaccination induced strong pertussis-specific antibody and memory responses. Patterns of bacterial clearance were similar in both age groups. In contrast, as observed in human neonates, neonatal DTPw priming did not induce significant antibody responses to pertussis toxin (PT) and filamentous hemagglutinin (FHA) and even interfered with subsequent antibody responses. However, this did not reflect induction of permanent neonatal tolerance, as antigen-specific antibodies could be elicited by subsequent exposure to DTPa. Furthermore, despite these blunted PT and FHA antibody responses, the protective efficacy of DTPw in neonatal mice proved similar to that in infant mice, resulting in complete bacterial clearance at day 8 after B. pertussis challenge. Thus, neonatal priming with antipertussis vaccines should be considered to reduce the window of vulnerability to pertussis at the time of its greatest severity.
Keywords Adhesins, Bacterial/immunologyAnimalsAnimals, NewbornAntibodies, Bacterial/biosynthesis/immunologyAntigens, Bacterial/immunologyBordetella pertussis/immunologyDiphtheria-Tetanus-Pertussis Vaccine/immunologyDiphtheria-Tetanus-acellular Pertussis Vaccines/immunologyDisease Models, AnimalHemagglutinins/immunologyMiceMice, Inbred BALB CPertussis ToxinVaccinationVirulence Factors, Bordetella/immunologyWhooping Cough/prevention & control
PMID: 12065491
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Research group Centre de Vaccinologie et d'Immunologie néonatale (177)
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RODUIT, Caroline Monique et al. Immunogenicity and protective efficacy of neonatal vaccination against Bordetella pertussis in a murine model: evidence for early control of pertussis. In: Infection and Immunity, 2002, vol. 70, n° 7, p. 3521-8. doi: 10.1128/IAI.70.7.3521-3528.2002 https://archive-ouverte.unige.ch/unige:55966

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Deposited on : 2015-04-30

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