Cited by 54Toxoplasma gondii Research Studiesvaccines and immunoinformatics approachesImmunotherapy and Immune Responses

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Characterization of a multi-epitope peptide with selective MHC-binding capabilities encapsulated in PLGA nanoparticles as a novel vaccine candidate against Toxoplasma gondii infection

Abstract

No effective human vaccine against Toxoplasma gondii (T. gondii) has yet been developed; however, a protective vaccine using immunogenic peptides in a safe delivery vehicle system offers promise. Here, we employed bioinformatics to design a multimeric recombinant T. gondii vaccine using predicted T and B cell epitopes of SAG1, AMA1, ROP2, and GRA4 proteins based on their binding capabilities to common major histocompatibility complex (MHC) molecules. Furthermore, we encapsulated the expressed protein in poly lactic-co-glycolic acid (PLGA) nanoparticles as a delivery vehicle and also used alum as an adjuvant to determine the vaccine potency of this multimeric antigen. BALB/c mice were vaccinated and then challenged with T. gondii RH strain, and the survival rate and cytokine profiles were studied. Mice vaccinated with the multi-epitope-based vaccine, both with and without PLGA, had greater Th1 immune responses, survival rates, specific antibody titers, and IFN-γ and IL-2 levels than controls, while the alum-adsorbed vaccine stimulated a Th2-type humoral immune response.

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Crossref · 10.1016/j.vaccine.2018.08.068

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Metadata

Authors
Roozbehani, M., Falak, R., Mohammadi, M., Hemphill, A., Razmjou, E., Meamar, A. R., Masoori, L., Khoshmirsafa, M., Moradi, M., & Gharavi, M. J.
Affiliations
  • Iran University of Medical Sciences (IR)
  • Bushehr University of Medical Sciences (IR)
  • University of Bern (CH)
Corresponding author
  • Razmjou, Elham
  • Gharavi, Mohammad Javad
Venue
Vaccine
Publisher
Elsevier BV
Published
2018-10
Volume
36
Issue
41
Pages
6124-6132
ISSN
0264-410X (ISSN-L)
OpenAlex
W2888923518
Cited by
54
References
0
Citations by year
2026: 1 · 2025: 4 · 2024: 9 · 2023: 4 · 2022: 5 · 2021: 16 · 2020: 9 · 2019: 6
FWCI
6.26
Type
journal article
Language
en
Open access
closed
Locations
  • Vaccine (publishedVersion)
  • PubMed (publishedVersion)
  • BORIS (University Library Bern) (submittedVersion)
Funders
Iran University of Medical Sciences (9221577201)
Topics
  • Life Sciences › Immunology and Microbiology › Parasitology › Toxoplasma gondii Research Studies
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › vaccines and immunoinformatics approaches
  • Life Sciences › Immunology and Microbiology › Immunology › Immunotherapy and Immune Responses
Keywords
Toxoplasma gondii, toxoplasmosis vaccine, multi-epitope peptide, MHC-binding peptides, PLGA nanoparticles, vaccine delivery, SAG1, AMA1, ROP2, T cell epitopes, B-cell epitopes, alum adjuvant, Th1 response, interferon-gamma, interleukin-2, cytokine profile
MeSH terms
Polylactic Acid-Polyglycolic Acid Copolymer, Adjuvants, Immunologic, Animals, Antibodies, Protozoan, Antigens, Protozoan, Female, Interferon-gamma, Interleukin-2, Mice, Inbred BALB C, Peptides, Toxoplasma, Protozoan Proteins, Protozoan Vaccines, Computational Biology, Mice, Nanoparticles, Immunity, Humoral

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