Functional analyses and single cell immunoprofiling uncover sex-specific differences in SARS-CoV2 immune memory...

Area of Science:

• Immunology
• Virology
• Genetics

Background:

• SARS-CoV-2 infection elicits diverse immune responses, with neutralizing antibodies crucial for protection.
• Understanding T cell and antibody dynamics is key to characterizing COVID-19 immunity.

Approach:

• Characterized neutralizing activity and T cell responses in mild SARS-CoV-2 cases from a single outbreak.
• Employed single-cell immunoprofiling for matched transcriptome and T-cell receptor (TCR) analysis.
• Investigated sex-specific associations between T cell responses, cytokine production, and antibody neutralization.

Key Points:

• Observed sex-specific links between nucleoprotein-specific T cell responses and antibody neutralization.
• Pro-inflammatory cytokines correlated with higher antibody titers exclusively in males.
• Identified differences in type I interferon signaling potentially influencing antibody generation.
• Discovered specific T-cell receptors (TCRs) associated with cytokine-producing T cells.

Conclusions:

• SARS-CoV-2 infection outcomes and immune responses show significant sex-specific variations.
• Sex-specific feedback loops may play a critical role in the generation of neutralizing antibodies.
• This research provides insights into the immunological landscape of SARS-CoV-2 infection.