OMIP‐060: 30‐Parameter Flow Cytometry Panel to Assess T Cell Effector Functions and Regulatory T Cells

Abstract We developed this comprehensive 28‐color flow cytometry panel with the aim to measure a variety of T cell effector functions in combination with T cell differentiation markers (CCR7, CD27, CD28, CD45RO, CD95) in γδ T cells and CD4+ and CD8+ αβ T cells (Table 1). The effector functions measured in this panel include activation and co‐stimulatory molecules (CD69, CD137, and CD154), cytokines (IL‐2, IL‐13, IL‐17A, IL‐21, IL‐22, TNF, and IFNγ), the chemokine IL‐8, cytotoxic molecules (perforin and granzyme B), and the degranulation marker CD107a. In addition, Ki67 enables the identification and analysis of recently activated T cells. To characterize regulatory T cells (Tregs), we included CD25, CD39, and the canonical Tregs transcription factor FoxP3. We developed and optimized this panel for cryopreserved human peripheral blood mononuclear cells (PBMC) and stimulation with phorbol 12‐myristate 13‐acetate (PMA) and ionomycin. However, we successfully tested other types of stimulation such as staphylococcus enterotoxin B (SEB) or a mix of immunodominant peptides (CEF peptide pool) from cytomegalovirus (CMV), Epstein–Barr virus (EBV) and influenza. Published 2019. This article is a U.S. Government work and is in the public domain in the USA.