CyTOF Intracellular Cytokine Assays for Antigen-Specific T Cells

Area of Science:

• Immunology
• Cellular Biology
• Mass Cytometry

Background:

• Antigen-specific T cells are crucial for adaptive immunity but often rare, complicating their study.
• Current methods for detecting antigen-specific T cells, like cytokine staining after in vitro stimulation, have limitations in scope and sensitivity.

Purpose of the Study:

• To present a protocol for high-parameter analysis of antigen-specific T cells.
• To enable detailed dissection of T cell frequency, phenotype, and function.
• To improve the efficiency of rare T cell subset analysis.

Main Methods:

• Utilizes CyTOF (mass cytometry) for single-cell analysis of numerous cytokines, chemokines, and cell-surface proteins.
• Incorporates magnetic bead enrichment targeting CD154 and CD69 expression on antigen-stimulated T cells.
• Combines magnetic enrichment with multiparameter mass cytometry for comprehensive T cell profiling.

Main Results:

• Enables detailed examination of rare antigen-specific T cell subsets.
• Provides deeper insights into T cell frequency, phenotype, and function.
• Minimizes CyTOF run times while maximizing data acquisition.

Conclusions:

• The combined approach of magnetic enrichment and mass cytometry significantly enhances the ability to study antigen-specific T cells.
• This protocol offers a powerful tool for dissecting complex immune responses involving rare T cell populations.
• Facilitates more comprehensive understanding of T cell behavior in various immunological contexts.