Linking Epitope-Specific T-Cell Receptors to IFNγ Secretion Using Nanovial Technology

Area of Science:

• Immunology
• Molecular Biology
• Biotechnology

Background:

• T-cells play a crucial role in adaptive immunity.
• Understanding the relationship between T-cell receptor (TCR) clonotypes and their secreted cytokines, such as interferon-gamma (IFNγ), is vital for dissecting immune responses.
• Current methods for linking specific TCRs to cytokine secretion profiles are often limited.

Purpose of the Study:

• To develop and validate a novel method for associating single epitope-specific T-cells with their corresponding TCRαβ clonotypes and IFNγ secretion levels.
• To demonstrate the utility of nanovials as a platform for high-throughput immune cell functional profiling.

Main Methods:

• Coating nanovials with peptide-MHC class I (pHLA-I) complexes to capture and activate epitope-specific T-cells.
• Measuring secreted IFNγ within nanovials.
• Performing index-sorting and TCRαβ sequencing on captured T-cells.

Main Results:

• Successfully linked IFNγ secretion levels of epitope-specific T-cells to their unique TCRαβ clonotypes.
• Demonstrated that nanovials can effectively capture, activate, and facilitate the analysis of single T-cells and their secreted products.
• Established a proof-of-concept for associating cellular function with molecular identity at the single-cell level.

Conclusions:

• Nanovials represent a promising technological advancement for linking T-cell receptor clonotypes to their functional characteristics, specifically IFNγ secretion.
• This method provides a powerful tool for detailed analysis of T-cell responses in various immunological contexts.
• The nanovial platform offers potential for broader applications in immune monitoring and therapeutic development.