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Article Abstract
Background/aims: This research explores the effectiveness of a new cytotoxic T-cell epitope peptide specific for HLA-A2402 in enhancing cellular immune responses to SARS-CoV-2 infections. HLA molecules play a key role in presenting antigenic epitopes to T cells, with genetic polymorphisms resulting in varying immune responses among individuals. The study aimed to investigate whether loading this epitope peptide into dendritic cells (DCs) from HLA-A2402(+) individuals could improve immune responses.
Methods: DCs were sensitized with varying doses of the peptide (2-12 µg/mL), with optimal results observed at 8 µg/mL. T-cell responses, proliferation, differentiation, Th cytokine secretion, CTL function, and apoptotic response were compared among the HLA-A2402(+), HLA-A2402(-), PBS control, DC only, and epitope-only groups.
Results: A significant enhancement in DC maturation, antigen presentation, T-cell activation, and proliferation was observed in the HLA-A2402(+) group compared to the HLA-A2402(-) control.
Conclusion: These findings suggest that HLA-A2402-restricted epitope peptides can enhance cellular immunity, offering potential for improving allele-specific SARS-CoV-2 vaccines and other molecular therapies, advancing precision medicine for infectious diseases.
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