» Articles » PMID: 15972492

Oral Spore Vaccine Based on Live Attenuated Nontoxinogenic Bacillus Anthracis Expressing Recombinant Mutant Protective Antigen

Overview
Journal Infect Immun
Date 2005 Jun 24
PMID 15972492
Citations 15
Authors
Affiliations
Soon will be listed here.
Abstract

An attenuated nontoxinogenic nonencapsulated Bacillus anthracis spore vaccine expressing high levels of recombinant mutant protective antigen (PA), which upon subcutaneous immunization provided protection against a lethal B. anthracis challenge, was found to have the potential to serve also as an oral vaccine. Guinea pigs immunized per os with the recombinant spore vaccine were primed to B. anthracis vegetative antigens as well as to PA, yet only a fraction of the animals (30% to 50%) mounted a humoral response to all of these antigens. Protective immunity provided by per os immunization correlated with a threshold level of PA neutralizing antibody titers and was long-lasting. Protection conferred by per os immunization was attained when the vaccine was administered in the sporogenic form, which, unlike the vegetative cells, survived passage through the gastrointestinal tract. A comparison of immunization of unirradiated spores with immunization of gamma-irradiated spores demonstrated that germination and de novo synthesis of PA were prerequisites for mounting an immune protective response. Oral immunization of guinea pigs with attenuated B. anthracis spores resulted in a characteristic anti-PA immunoglobulin isotype profile (immunoglobulin [G1 IgG1] versus IgG2), as well as induction of specific anti-PA secretory IgA, indicating development of mucosal immunity.

Citing Articles

Immunological Evidence of Variation in Exposure and Immune Response to in Herbivores of Kruger and Etosha National Parks.

Ochai S, Crafford J, Hassim A, Byaruhanga C, Huang Y, Hartmann A Front Immunol. 2022; 13:814031.

PMID: 35237267 PMC: 8882864. DOI: 10.3389/fimmu.2022.814031.


A Comprehensive Overview on the Production of Vaccines in Plant-Based Expression Systems and the Scope of Plant Biotechnology to Combat against SARS-CoV-2 Virus Pandemics.

Kumar M, Kumari N, Thakur N, Bhatia S, Saratale G, Ghodake G Plants (Basel). 2021; 10(6).

PMID: 34203729 PMC: 8232254. DOI: 10.3390/plants10061213.


Protective antibody response following oral vaccination with microencapsulated Sterne strain 34F2 spores.

Benn Felix J, Chaki S, Xu Y, Ficht T, Rice-Ficht A, Cook W NPJ Vaccines. 2020; 5:59.

PMID: 32685200 PMC: 7351773. DOI: 10.1038/s41541-020-0208-3.


Next-Generation Bacillus anthracis Live Attenuated Spore Vaccine Based on the htrA(-) (High Temperature Requirement A) Sterne Strain.

Chitlaru T, Israeli M, Bar-Haim E, Elia U, Rotem S, Ehrlich S Sci Rep. 2016; 6:18908.

PMID: 26732659 PMC: 4702213. DOI: 10.1038/srep18908.


The Exosporium Layer of Bacterial Spores: a Connection to the Environment and the Infected Host.

Stewart G Microbiol Mol Biol Rev. 2015; 79(4):437-57.

PMID: 26512126 PMC: 4651027. DOI: 10.1128/MMBR.00050-15.


References
1.
Pezard C, Berche P, Mock M . Contribution of individual toxin components to virulence of Bacillus anthracis. Infect Immun. 1991; 59(10):3472-7. PMC: 258908. DOI: 10.1128/iai.59.10.3472-3477.1991. View

2.
Marcus H, Danieli R, Epstein E, Velan B, Shafferman A, Reuveny S . Contribution of immunological memory to protective immunity conferred by a Bacillus anthracis protective antigen-based vaccine. Infect Immun. 2004; 72(6):3471-7. PMC: 415724. DOI: 10.1128/IAI.72.6.3471-3477.2004. View

3.
Duc L, Hong H, Fairweather N, Ricca E, Cutting S . Bacterial spores as vaccine vehicles. Infect Immun. 2003; 71(5):2810-8. PMC: 153275. DOI: 10.1128/IAI.71.5.2810-2818.2003. View

4.
Little S, Ivins B, Fellows P, Friedlander A . Passive protection by polyclonal antibodies against Bacillus anthracis infection in guinea pigs. Infect Immun. 1997; 65(12):5171-5. PMC: 175745. DOI: 10.1128/iai.65.12.5171-5175.1997. View

5.
Guillobel H, Carinhanha J, Cardenas L, Clements J, de Almeida D, Ferreira L . Adjuvant activity of a nontoxic mutant of Escherichia coli heat-labile enterotoxin on systemic and mucosal immune responses elicited against a heterologous antigen carried by a live Salmonella enterica serovar Typhimurium vaccine strain. Infect Immun. 2000; 68(7):4349-53. PMC: 101767. DOI: 10.1128/IAI.68.7.4349-4353.2000. View