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Immunogenicity and Protective Efficacy of a Multi-Antigen Subunit Vaccine in Mice. | LitMetric

AI Article Synopsis

Article Abstract

There is an urgent need for an effective TB vaccine capable of controlling both acute and chronic infection in populations with diverse genetic backgrounds. In this study, we characterised the immunogenicity and protective efficacy of a novel protein-in-adjuvant subunit vaccine. The protein component is a fusion protein of three different antigens, which we termed CysVac5: CysD, a major component of the sulfate activation pathway that is highly expressed during the chronic stage of infection, is fused with two major secreted mycobacterial antigens, Ag85B and MPT83. Vaccination of C57BL/6 mice with CysVac5, formulated in a monophosphoryl lipid A (MPLA) and dimethyldioctadecylammonium (DDA) adjuvant combination, resulted in the potent generation of polyfunctional CD4 T cells secreting multiple cytokines, including IFN-γ, IL-2, TNF and IL-17, against each of the three components of the fusion protein. Furthermore, vaccination with CysVac5-MPLA/DDA conferred significant protection against infection in mouse lungs, which was greater than that afforded by BCG at extended time points post-challenge. The generation of antigen-specific and protective immunity was also observed in CysVac5 vaccinated BALB/c mice, indicating the vaccine could display efficacy across multiple genetic backgrounds. These results indicate that the CysVac5 vaccine has broad immunogenicity, is effective in controlling both acute and chronic phases of infection in mice, and warrants further investigation to assess its potential to control pulmonary TB.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11435920PMC
http://dx.doi.org/10.3390/vaccines12090997DOI Listing

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