Protocol to evaluate virus-specific CD4⁺ and CD8⁺ T cell responses by spectral flow cytometry

Area of Science:

• Immunology
• Virology
• Biotechnology

Background:

• T cell responses are crucial for controlling viral infections and preventing disease.
• Accurate detection of virus-specific T cell responses is essential for vaccine development and disease monitoring.
• Existing methods may have limitations in sensitivity or throughput for comprehensive T cell analysis.

Purpose of the Study:

• To establish a detailed protocol for detecting severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2)-specific T cell responses.
• To utilize spectral flow cytometry for sensitive and multiplexed analysis of T cell immunity.
• To provide a reproducible method applicable to other viral T cell response studies.

Main Methods:

• Peripheral blood mononuclear cells (PBMCs) were thawed and stimulated with SARS-CoV-2 spike peptide pools.
• Spectral flow cytometry was employed for high-parameter cell analysis.
• Detailed procedures for cell fixation, staining, and confinement were optimized.

Main Results:

• The protocol successfully enabled the detection of SARS-CoV-2 specific T cell responses.
• Spectral flow cytometry provided detailed insights into T cell populations and functions.
• The described methodology is robust and reproducible for T cell immune profiling.

Conclusions:

• This protocol offers a valuable tool for assessing T cell immunity against SARS-CoV-2.
• The method has broad applicability for studying T cell responses to other viral pathogens.
• Spectral flow cytometry is a powerful platform for advancing infectious disease research.