CD4⁺CD8α⁺ T cells exhibit suppressor activity.

<p>Purified CD4⁺CD8α⁺ or CD4⁺CD8α⁻ T cells were co-cultured with CFSE-labeled CD4⁺ effector T cells. Six days after culture, effector T cell CFSE dilution (<b>A</b>) and IFN-γ, IL-2 and IL-4 production were determined (<b>B</b>). Data is representative of at least 2 independent experiments, n = 3..