A human phase 1 vaccine clinical trial of the Plasmodium falciparum malaria vaccine candidate apical membrane antigen 1 in Montanide ISA720 adjuvant Academic Article uri icon

abstract

  • A dose escalating, placebo-controlled phase 1 trial was conducted to test the safety and immunogenicity of a vaccine containing recombinant Plasmodium falciparum apical membrane antigen 1 (AMA1) formulated in Montanide ISA720. Three groups of volunteers were vaccinated intramuscularly with 5 microg, 20 microg or 80 microg of AMA1, respectively, in 0.5 mL of formulation at 0, 3 and 6 months. Anti-AMA1 antibody levels and T cell stimulation indices were measured before and after each vaccination. No vaccine-related serious adverse events were recorded. Most subjects generated a mild to moderate, transient local reaction after the first vaccination. Three subjects developed a local reaction approximately 10 days following vaccination. Six of the 29 subjects seroconverted. Only one of these developed a high antibody titre. However, the interpretation of this trial was compromised by a loss of potency of the formulated vaccine during the course of the study.

authors

  • Saul, Allan
  • Lawrence, Greg
  • Allworth, Anthony
  • Elliott, Suzanne
  • Anderson, Karen
  • Rzepczyk, Christine
  • Martin, Laura B
  • Taylor, Darrin
  • Eisen, Damon P
  • Irving, David O
  • Pye, David
  • Crewther, Pauline E
  • Hodder, Anthony N
  • Murphy, Vincent J
  • Anders, Robin F

publication date

  • April 2005