A Viral Nanoparticle with Dual Function as an Anthrax Antitoxin and Vaccine
نویسندگان
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.
منابع مشابه
Evaluation the Efficacy of Anthrax Vaccine against Challenge with a Highly Virulent Strain of Bacillus anthracis Isolated from Soil in Sheep, Goats and Guinea Pigs in Iran
Protection of animals immunized against Bacillus anthracis is usually demonstrated by challenging with an appropriate dose of a strain of Bacillus anthracis that is lethal to unvaccinated animals inoculated at the same time. In this study the protective efficacy in anthrax vaccine (34F2 sterne strain spore) was evaluated in sheep, goats and guinea pigs challenged with subcutaneous inoculation...
متن کاملConstruction of a Eukaryotic Plasmid Encoding Bacillus anthracis Protective Antigen, a Candidate for DNA Vaccine
Background: DNA immunization with plasmid DNA encoding bacterial, viral, parasitic and tumor antigens has been reported to trigger protective immunity. Objective: To evaluate the use of a DNA immunization strategy for protection against anthrax, a plasmid was constructed. Methods: The partialsequence of protective antigen of Bacillus anthracis, amino acids 175-764, as a potent immunogenic targe...
متن کاملImmunization of Cattle and Buffaloes With a Combined Anthrax, Haemorrhagic septicaemia and Blackleg Vaccine in Iran
متن کامل
Stability and potency studies of anthrax vaccine (Bacillus anthracis 34F2 Sterne strain) in Iran
For evaluation the stability and potency of anthrax vaccine prepared in Razi Vaccine and Serum Research Institute in Iran, samples of different batches of vaccine were kept at 4-8 °C (refrigerator), 20-25 °C (room temperature) and 37 °C (incubator).The viable spores/ml of vaccines were determined using plate–counting method before and after holding at different temperatures monthly. Vaccine p...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- PLoS Pathogens
دوره 3 شماره
صفحات -
تاریخ انتشار 2007