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Plos One : Immunogenic and Invasive Properties of Brucella Melitensis 16M Outer Membrane Protein Vaccine Candidates Identified Via a Reverse Vaccinology Approach, Volume 8

By Bansal, P. Geetha

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Book Id: WPLBN0003950154
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Reproduction Date: 2015

Title: Plos One : Immunogenic and Invasive Properties of Brucella Melitensis 16M Outer Membrane Protein Vaccine Candidates Identified Via a Reverse Vaccinology Approach, Volume 8  
Author: Bansal, P. Geetha
Volume: Volume 8
Language: English
Subject: Journals, Science, Medical Science
Collections: Periodicals: Journal and Magazine Collection (Contemporary)
Historic
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Publisher: Plos

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Bansal, P. G. (n.d.). Plos One : Immunogenic and Invasive Properties of Brucella Melitensis 16M Outer Membrane Protein Vaccine Candidates Identified Via a Reverse Vaccinology Approach, Volume 8. Retrieved from http://netlibrary.net/


Description
Description : Brucella is the etiologic agent of brucellosis, one of the most common and widely distributed zoonotic diseases. Its highly infectious nature, the insidious, systemic, chronic, debilitating aspects of the disease and the lack of an approved vaccine for human use in the United States are features that make Brucella a viable threat to public health. One of the main impediments to vaccine development is identification of suitable antigens. In order to identify antigens that could potentially be used in a vaccine formulation, we describe a multi-step antigen selection approach. We initially used an algorithm (Vaxign) to predict ORF encoding outer membrane proteins with antigenic determinants. Differential gene expression during acute infection and published evidence for a role in virulence were used as criteria for down-selection of the candidate antigens that resulted from in silico prediction. This approach resulted in the identification of nine Brucella melitensis outer membrane proteins, 5 of which were recombinantly expressed and used for validation. Omp22 and Hia had the highest in silico scores for adhesin probability and also conferred invasive capacity to E. coli overexpressing recombinant proteins. With the exception of FlgK in the goat, all proteins reacted to pooled sera from exposed goats, mice, and humans. BtuB, Hia and FlgK stimulated a mixed Th1–Th2 response in splenocytes from immunized mice while BtuB and Hia elicited NO release from splenocytes of S19 immunized mice. The results support the applicability of the current approach to the identification of antigens with immunogenic and invasive properties. Studies to assess immunogenicity and protective efficacy of individual proteins in the mouse are currently underway.

 

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