Immunogenicity of Multi-epitope Vaccine Candidate against Toxoplasma gondii Infection in BALB/c Mice
Abstract
Background: Toxoplasma gondii is a widely prevalent intracellular protozoan parasite which causes serious clinical and veterinary problems. Development of an effective vaccine for controlling toxoplasmosis is an extremely important aim. In the present study, the protective efficacy of recombinant multiepitope antigen (USM.TOXO1) expressing nine potential epitopes identified from SAG1, GRA2, and GRA7 of Toxoplasma gondii was evaluated in BALB/c mice.
Methods: Mice were immunized subcutaneously with three doses of USM.TOXO1 antigen (10 µg/ml). Following the immunization, the IgG antibody, IgG subclass, IFN-γ and IL-4 production were evaluated using ELISA, the study was conducted at Animal Research and Service Center (ARASC), USM Health Campus in 2016.
Results: Mice immunized with USM.TOXO1 significantly induced a mixed Th1/Th2 response polarized toward the IgG1 antibody isotype. While the cytokine analysis revealed a significant release of IFN-γ cytokines.
Conclusion: USM.TOXO1 is a potential vaccine candidate that elicits strong immunity in BALB/c mice. The proven immunogenicity of the generated antigen can serve as a premise for further use of epitope-based vaccine in the immunoprevention of human and animal toxoplasmosis.
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| Files | ||
| Issue | Vol 13 No 2 (2018) | |
| Section | Original Article(s) | |
| Keywords | ||
| Toxoplasma gondii Multiepitope peptide SAG1 GRA2 GRA7 Vaccine | ||
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