Acellular pertussis vaccines containing genetically detoxified pertussis toxin induce long-lasting humoral and cellular responses in adults

被引:32
作者
DiTommaso, A [1 ]
Bartalini, M [1 ]
Peppoloni, S [1 ]
Podda, A [1 ]
Rappuoli, R [1 ]
DeMagistris, MT [1 ]
机构
[1] CHIRON VACCINES IMMUNOBIOL RES INST, IRIS, I-53100 SIENA, ITALY
关键词
whooping cough; pertussis toxin; acellular pertussis vaccines;
D O I
10.1016/S0264-410X(97)00023-6
中图分类号
R392 [医学免疫学]; Q939.91 [免疫学];
学科分类号
100102 ;
摘要
New generation pertussis vaccines, containing only purified Bordetella pertussis antigens, have been proven safe, immunogenic and efficacious. They have, however, raised new questions regarding the mechanism of protection from whooping cough and the duration of the immune response following vaccination. In addition to the antibody (Ab) titer, the level of pertussis toxin (PT) neutralizing antibodies may be very important in protection and the role of cell-ediated immunity needs to be defined. We have previously reported the safety and immunogenicity results of two phase I trials in adult volunteers with two acellular pertussis vaccines containing genetically detoxified PT alone or in combination with filamentous hemagglutinin (FHA) and 69K protein. In this work, we present the results of a long term follow-up study of the immune response in the same vac cinees. We evaluated the Ab response, the PT neutrealizing titer and the peripheral blood T cell response up to 4 years following vaccination. Our results show that in adults the level of antibodies to PT, FHA and 69K and the PT neutralizing titers slightly decline between 2.5 and 12 months after the last vaccine dose, but they remain high in the following 2-4 years, showing levels 10-100 times higher than pre-vaccination values. The T cell responses were more heterogeneous among vaccines but they did not show any significant decline throughout the period monitored. (C) 1997 Elsevier Science Ltd.
引用
收藏
页码:1218 / 1224
页数:7
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