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Advax-adjuvanted recombinant protective antigen provides protection against inhalational anthrax that is further enhanced by addition of murabutide adjuvant.
- Source :
-
Clinical and vaccine immunology : CVI [Clin Vaccine Immunol] 2014 Apr; Vol. 21 (4), pp. 580-6. Date of Electronic Publication: 2014 Feb 19. - Publication Year :
- 2014
-
Abstract
- Subunit vaccines against anthrax based on recombinant protective antigen (PA) potentially offer more consistent and less reactogenic anthrax vaccines but require adjuvants to achieve optimal immunogenicity. This study sought to determine in a murine model of pulmonary anthrax infection whether the polysaccharide adjuvant Advax or the innate immune adjuvant murabutide alone or together could enhance PA immunogenicity by comparison to an alum adjuvant. A single immunization with PA plus Advax adjuvant afforded significantly greater protection against aerosolized Bacillus anthracis Sterne strain 7702 than three immunizations with PA alone. Murabutide had a weaker adjuvant effect than Advax when used alone, but when murabutide was formulated together with Advax, an additive effect on immunogenicity and protection was observed, with complete protection after just two doses. The combined adjuvant formulation stimulated a robust, long-lasting B-cell memory response that protected mice against an aerosol challenge 18 months postimmunization with acceleration of the kinetics of the anamnestic IgG response to B. anthracis as reflected by ∼4-fold-higher anti-PA IgG titers by day 2 postchallenge versus mice that received PA with Alhydrogel. In addition, the combination of Advax plus murabutide induced approximately 3-fold-less inflammation than Alhydrogel as measured by in vivo imaging of cathepsin cleavage resulting from injection of ProSense 750. Thus, the combination of Advax and murabutide provided enhanced protection against inhalational anthrax with reduced localized inflammation, making this a promising next-generation anthrax vaccine adjuvanting strategy.
- Subjects :
- Acetylmuramyl-Alanyl-Isoglutamine administration & dosage
Alum Compounds administration & dosage
Animals
Anthrax Vaccines administration & dosage
Antibodies, Bacterial blood
Antigens, Bacterial administration & dosage
Bacterial Toxins administration & dosage
Female
Immunoglobulin G blood
Immunologic Memory
Inulin administration & dosage
Mice
Survival Analysis
Vaccines, Subunit administration & dosage
Vaccines, Subunit immunology
Acetylmuramyl-Alanyl-Isoglutamine analogs & derivatives
Adjuvants, Immunologic administration & dosage
Anthrax prevention & control
Anthrax Vaccines immunology
Antigens, Bacterial immunology
Bacterial Toxins immunology
Inulin analogs & derivatives
Subjects
Details
- Language :
- English
- ISSN :
- 1556-679X
- Volume :
- 21
- Issue :
- 4
- Database :
- MEDLINE
- Journal :
- Clinical and vaccine immunology : CVI
- Publication Type :
- Academic Journal
- Accession number :
- 24554695
- Full Text :
- https://doi.org/10.1128/CVI.00019-14