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  • Title: A controlled clinical trial comparing the safety and immunogenicity of a new adjuvanted hepatitis B vaccine with a standard hepatitis B vaccine.
    Author: Dupont J, Altclas J, Lepetic A, Lombardo M, Vázquez V, Salgueira C, Seigelchifer M, Arndtz N, Antunez E, von Eschen K, Janowicz Z.
    Journal: Vaccine; 2006 Nov 30; 24(49-50):7167-74. PubMed ID: 16884836.
    Abstract:
    A randomised trial was conducted in 285 adults not immune to hepatitis B (HB) to compare the safety and immunogenicity of a commercial aluminium-adjuvanted HB vaccine with and without an additional new adjuvant (AgB/RC-210-04 or AgB study groups, respectively). The additional adjuvant RC-529 is a fully synthetic monosaccharide mimetic of monophosphoryl lipid A. Subjects in the AgB/RC-210-04 (n=136) and AgB (n=149) groups were vaccinated intramuscularly on days 0, 30, and 180, according to the standard vaccination schedule for hepatitis B vaccines. Serum levels of anti-HBs were measured on days 30, 60, 90, 180, and 210. Standard safety assessments were made throughout the study period. The rates of seroprotection (anti-HBs > or =10.0 mIU/ml) were significantly greater for the AgB/RC-210-04 group at all time points: at day 90, the seroprotection rate, the primary endpoint of the trial, was 99% for AgB/RC-210-04 compared with 84% for AgB (p<0.0001). Similarly, geometric mean anti-HBs titres were significantly higher at all time points for the AgB/RC-210-04 group. There were more local reactions in the AgB/RC-210-04 group, however they were transient and this double-adjuvanted formulation was well tolerated. We conclude that the addition of a synthetic adjuvant to the AgB vaccine significantly enhanced the immunogenicity of the commercial vaccine AgB. The results indicate furthermore that a two-dose regime of the double-adjuvanted vaccine (schedule: 0-1 month) may be sufficient to achieve seroprotection in nearly 100% of individuals.
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