A Viral Nanoparticle with Dual Function as an Anthrax Antitoxin and Vaccine

نویسندگان

  • Darly J Manayani
  • Diane Thomas
  • Kelly A Dryden
  • Vijay Reddy
  • Marc E Siladi
  • John M Marlett
  • G. Jonah A Rainey
  • Michael E Pique
  • Heather M Scobie
  • Mark Yeager
  • John A. T Young
  • Marianne Manchester
  • Anette Schneemann
چکیده

The recent use of Bacillus anthracis as a bioweapon has stimulated the search for novel antitoxins and vaccines that act rapidly and with minimal adverse effects. B. anthracis produces an AB-type toxin composed of the receptor-binding moiety protective antigen (PA) and the enzymatic moieties edema factor and lethal factor. PA is a key target for both antitoxin and vaccine development. We used the icosahedral insect virus Flock House virus as a platform to display 180 copies of the high affinity, PA-binding von Willebrand A domain of the ANTXR2 cellular receptor. The chimeric virus-like particles (VLPs) correctly displayed the receptor von Willebrand A domain on their surface and inhibited lethal toxin action in in vitro and in vivo models of anthrax intoxication. Moreover, VLPs complexed with PA elicited a potent toxin-neutralizing antibody response that protected rats from anthrax lethal toxin challenge after a single immunization without adjuvant. This recombinant VLP platform represents a novel and highly effective, dually-acting reagent for treatment and protection against anthrax.

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عنوان ژورنال:
  • PLoS Pathogens

دوره 3  شماره 

صفحات  -

تاریخ انتشار 2007