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A recombinant, catalytically inactive Clostridium botulinum neurotoxin A1 holoprotein (ciBoNT/A1 HP) was constructed by introducing amino acid substitutions H223A, E224A, and H227A in the active site to ablate proteolytic activity. ciBoNT/A1 HP was produced in the yeast Pichia pastoris and the purified product was evaluated as a vaccine candidate by comparison against recombinant BoNT/A1 LC, LC-belt,...
The development of multiagent vaccines offers the advantage of eliciting protection against multiple diseases with minimal inoculations over a shorter time span. We report here the results of using formulations of individual Venezuelan equine encephalitis (VEE) virus replicon-vectored vaccines against a bacterial disease, anthrax; a viral disease, Marburg fever; and against a toxin-mediated disease,...
Botulism is a potentially lethal disease caused by one of seven homologous neurotoxic proteins usually produced by the bacterium, Clostridium botulinum. This neuromuscular disorder occurs through an exquisite series of molecular events, ultimately ending with the arrest of acetylcholine release and hence, flaccid paralysis. The development of vaccines that protect against botulism dates back to the...
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