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  • Title: Characteristics and potency of an acellular pertussis vaccine composed of pertussis toxin, filamentous hemagglutinin, and pertactin.
    Author: Sheu GC, Wo YY, Yao SM, Chou FY, Hsu TC, Ju CL, Cheng Y, Chang SN, Lu CH.
    Journal: J Microbiol Immunol Infect; 2001 Dec; 34(4):243-51. PubMed ID: 11825003.
    Abstract:
    In an attempt to develop a safer pertussis vaccine, we successfully purified 3 pertussis protective antigens-pertussis toxin, filamentous hemagglutinin, and a 69-kDa outer membrane protein (also named pertactin), from Bordetella pertussis strain ATCC 9340. The toxicity of pertussis toxin could be effectively reduced by the treatment with formaldehyde 0.07% while preserving of a high degree of immunogenicity. By mixing purified pertussis antigens with diphtheria and tetanus toxoids (DT), we have formulated a DT acellular pertussis (DTaP) vaccine. Toxicity studies on body-weight gain in mouse, histamine sensitization, lymphocyte promoting, and Chinese hamster ovary cell clustering tests suggested that this DTaP vaccine is safer than a whole cell vaccine produced in France (DTP[F]). The formulated vaccine elicited high levels of anti-pertussis toxin antibodies in both mice and monkeys. In mice, a 2-fold neutralization of anti-pertussis toxin antibodies was produced by DTaP compared with DTP(F) vaccine and an acellular vaccine manufactured in Japan (DTaP[J]). More importantly, in intracerebral challenge assay in mouse, this vaccine also provided a better protection than DTaP(J).
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