title: Acellular pertussis vaccines: evaluation of reversion in a nude mouse model.
abstract: An animal model has been developed to assess the safety of acellular pertussis vaccines in terms of reversion to toxicity. Adsorbed pertussis toxoid preparations, alone or combined in a DTP formulation, were administered to nude mice intraperitoneally. In parallel, groups of positive and negative control mice received pertussis toxin and buffer, respectively. The circulating white blood cells of the animals were monitored for 28 days. Mice immunized with glutaraldehyde toxoid preparations did not develop a lymphocytosis during the observation period, whereas mice immunized with an experimental formalin pertussis toxoid vaccine exhibited a high lymphocytosis six days after vaccine administration, demonstrating, in this model, a reversion of the toxoid. The nude mouse model thus appears to reveal the in-vivo reversion of pertussis toxoids and could be included in the quality control panel for the assessment of the safety of acellular pertussis vaccine.
authors.affiliation: Institut Mérieux, Marcy l'Etoile, Charbonnières, France.
authors.forename: M J
authors.initials: MJ
authors.lastname: Quentin-Millet
authors.forename: F
authors.initials: F
authors.lastname: Arminjon
authors.forename: B
authors.initials: B
authors.lastname: Danve
authors.forename: M
authors.initials: M
authors.lastname: Cadoz
authors.forename: J
authors.initials: J
authors.lastname: Armand
mesh_terms: D000818:Animals; D004168:Diphtheria Toxoid / Q000592:standards / Q000633:toxicity; D015721:Diphtheria-Tetanus-Pertussis Vaccine; D004338:Drug Combinations / Q000592:standards / Q000633:toxicity; D005260:Female; D008218:Lymphocytosis / Q000209:etiology; D051379:Mice; D008819:Mice, Nude; D037342:Pertussis Toxin; D010567:Pertussis Vaccine / Q000592:standards / Q000633:toxicity*; D013745:Tetanus Toxoid / Q000592:standards / Q000633:toxicity; D014121:Toxoids / Q000592:standards / Q000633:toxicity*; D010566:Virulence Factors, Bordetella / Q000633:toxicity
chemical_list: D004168:Diphtheria Toxoid; D015721:Diphtheria-Tetanus-Pertussis Vaccine; D004338:Drug Combinations; D010567:Pertussis Vaccine; D013745:Tetanus Toxoid; D014121:Toxoids; D010566:Virulence Factors, Bordetella; C051093:pertussis toxoid; D037342:Pertussis Toxin