alexa Development of Recombinant Domains of Protective Antigen of Bacillus anthracis and Evaluation of their Immune Response in Mouse Model for Use as Vaccine Candidates for Anthrax | Abstract
ISSN: 2157-2526

Journal of Bioterrorism & Biodefense
Open Access

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Research Article

Development of Recombinant Domains of Protective Antigen of Bacillus anthracis and Evaluation of their Immune Response in Mouse Model for Use as Vaccine Candidates for Anthrax

Anshul Varshney and Goel AK *

Biotechnology Division, Defence Research and Development Establishment, Jhansi Road, Gwalior, India

Corresponding Author:
Goel AK
Biotechnology Division
Defence Research and Development Establishment
Jhansi Road, Gwalior, India
Tel: 91-751-2233742
E-mail: [email protected]

Received date: May 25, 2016; Accepted date: June 06, 2016; Published date: June 12, 2016

Citation: Varshney A, Goel AK (2016) Development of Recombinant Domains of Protective Antigen of Bacillus anthracis and Evaluation of their Immune Response in Mouse Model for Use as Vaccine Candidates for Anthrax. J Bioterror Biodef 7:147. doi: 10.4172/2157-2526.1000147

Copyright: © 2016 Vashney A, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Abstract

Bacillus anthracis, the causative agent of anthrax is considered as the most important biological warfare agent. This Gram-positive, spore forming bacterium has three modes of infection i.e. cutaneous, inhalational and gastrointestinal in human. The principal virulence factors of this bacterium consist of an anti-phagocytic capsule composed of poly-D-glutamic acid and a secreted tripartite bacterial toxin composed of protective antigen (PA), lethal factor (LF) and edema factor (EF). PA is the pivotal protein of the anthrax toxin complex and immune response to PA is central to protection against B. anthracis. In this study, overlapping portions of four different domains of PA were cloned and expressed. The recombinant proteins were purified and used for immunization in mice. The ELISA results showed that all the domains elicited high antibody titres in vaccinated animals. However domain PAD3-4 showed the highest immune response against PA. Among the IgG subtypes, IgG1 response was predominant in all the immunized groups followed by IgG2. This indicated the induction of Th2 type immune responses against all the recombinant protein vaccine candidates. The study showed that the individual domains have also the potential as vaccine candidates for anthrax.

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