Pre-existing SARS-2-specific T cells are predicted to cross-recognize BA.2.86

Area of Science:

• Immunology
• Virology
• Computational Biology

Background:

• Monitoring evolving SARS-CoV-2 variants is crucial for understanding immune evasion.
• Mutations in SARS-CoV-2 can impact T cell recognition and immune responses.

Purpose of the Study:

• To predict the impact of BA.2.86 mutations on SARS-CoV-2-specific T cell responses.
• To assess the conservation of T cell epitopes across SARS-CoV-2 variants.

Main Methods:

• Computational prediction of T cell epitope conservation.
• Analysis of mutations in SARS-CoV-2 spike protein.
• Simulation of immune responses to viral variants.

Main Results:

• A high percentage of CD4 (72%) and CD8 (89%) T cell epitopes are conserved in the BA.2.86 variant.
• Most mutated spike epitopes retained binding to HLA-restricting alleles.
• Novel BA.2.86 epitopes were identified through comparative analysis.

Conclusions:

• SARS-CoV-2 T cell responses show significant conservation against the BA.2.86 variant.
• Conserved epitopes may provide a stable T cell response across evolving variants.
• Variant-specific epitopes induced by infection or vaccination can bridge immunity gaps.