Protective Immunity Evoked Against Anthrax Lethal Toxin after a Single Intramuscular Administration of an Adenovirus-Based Vaccine Encoding Humanized Protective Antigen Academic Article uri icon


MeSH Major

  • Adenoviridae
  • Anthrax Vaccines
  • Antibodies, Bacterial
  • Antigens, Bacterial
  • Bacterial Toxins


  • Because of the need to develop a vaccine to rapidly protect the civilian population in response to a bioterrorism attack with Bacillus anthracis, we designed AdsechPA, a replication-deficient human serotype 5 adenovirus encoding B. anthracis protective antigen (PA) with codons optimized for expression in mammalian cells. With a single intramuscular administration to mice of 10(9) particle units of AdsechPA, a dose that can be scaled to human use, anti-PA antibodies were evoked more rapidly and at a higher level than with a single administration of the new U.S. military recombinant PA/Alhydrogel vaccine. Importantly, AdsechPA afforded approximately 2.7-fold more protection than the recombinant PA vaccine against B. anthracis lethal toxin challenge 4 weeks after a single vaccination. Even at 11 days postvaccination, AdsechPA provided some survival benefit, whereas the rPA/Alhydrogel vaccine provided none. In the context that equivalent human doses of Ad vectors have already been demonstrated to be safe in humans, a single administration of AdsechPA may provide the means to rapidly protect the civilian population against B. anthracis in response to a bioterrorism attack.

publication date

  • November 20, 2003



  • Academic Article



  • eng

Digital Object Identifier (DOI)

  • 10.1089/104303403322542310

PubMed ID

  • 14633409

Additional Document Info

start page

  • 1673

end page

  • 82


  • 14


  • 17