MAIT cells, identified as Vα7.2+ CD161+ cells, and CD4+ CD25− responder T cells were sorted from the peripheral blood of 3 healthy donors. Responder T cells were labeled with 0.5 μM CFSE. 2.5×104 CFSE-labeled responder T cells were stimulated with Dynabeads CD3/CD28 T Cell Expander (Dynal Biotech) and cultured with MAIT cells or responder T cells at a ratio of 1:1, 1:2, 1:4, and 1:8 MAIT:responder in round-bottom 96-well plates for 4 days. After 4 days, CFSE dilution was evaluated by flow cytometry.
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