Efficacy of Multivalent Dengue Vaccine Candidates Predicted In Silico

Area of Science:

• Virology
• Immunology
• Vaccine Development

Background:

• Dengue virus (DENV) poses a growing global health threat.
• The immunogenicity of DENV structural proteins remains incompletely understood, hindering vaccine design.

Purpose of the Study:

• To predict and evaluate the immunogenicity of DENV structural proteins, particularly the envelope protein.
• To identify potential vaccine candidates by assessing T-cell mediated immune responses.

Main Methods:

• In silico prediction of B-cell and T-cell epitopes using BepiPred-2.0 and IEDB.
• In vitro validation through T-cell proliferation assays.
• In vivo assessment in mice using ELISpot, qRT-PCR, and plaque reduction neutralization tests.

Main Results:

• Identified nine-amino-acid peptide candidates with high immunogenicity scores.
• Confirmed T-cell stimulation and significant cytokine regulation (IFN-γ, TNF-α, IL-4) in vaccinated mice.
• Demonstrated induction of cellular immunity via plaque reduction neutralization tests.

Conclusions:

• Selected DENV envelope protein peptides elicit robust cellular immune responses.
• These findings support the development of epitope-based vaccines against Dengue virus.