Vaccine · 2002
DDA adjuvant induces a mixed Th1/Th2 immune response when associated with BBG2Na, a respiratory syncytial virus potential vaccine.
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Klinguer-Hamour Christine, Libon Christine, Plotnicky-Gilquin Hélène, Bussat Marie Claire, Revy Lydie, Nguyen Thien, Bonnefoy Jean Yves, Corvaïa Nathalie, Beck Alain
Аннотация
Human respiratory syncytial virus (hRSV) is one of the most common causes of respiratory infection in infants and the elderly. Previous attempts to vaccinate children against RSV failed and the induction of an aberrant Th2-type immune response was shown to induce severe to fatal pulmonary disease characterised in part by eosinophilia. BBG2Na is a promising human RSV subunit vaccine candidate which successfully passed phase II clinical trials in adults in association with Adju-Phos((R)). However, this formulation is not the most suitable for use in children since aluminium salts are known to induce a Th2-based immune response. In this study, we describe a potent and safe adjuvant formulation for BBG2Na in dimethyldioctadecylammonium bromide (DDA) that induces a mixed Th1/Th2 immune response in BALB/c mice. Furthermore, BBG2Na showed the same protective efficacy against RSV challenge when formulated either in DDA or in alum in mice and cotton rats.