The following Abs were used for culture or surface and intracellular cytokine staining for flow cytometry: CD28 (CD28.2, BD), CD49d (9F10, BD), CD3-PECY7 (SP34-2, BD), CD3-PB (SP34-2, BD), CD4-APC (L200, BD, used for measuring CD4 expression after CD4 depleting Ab treatment), CD8-PB (RPA-T8, BD), CD8-APC (RPA-T8, BD), CD8-PE (RPA-T8, BD), IFN-γ-Allophycocyanin (4S.B3, BD), IFN-γ-PE (4S.B3, BD), TNF-α-PE (MAb11, BD), TNF-α-APC (MAb11, BD), TNF-α-PB (MAb11, eBioscience), IL-17-PE (eBio64CAP17, eBioscience), IL-17-Alexa647 (eBio64CAP17, eBioscience), IL-22-biotinylated (anti-human IL-22, RD, see reference(44 (link))), Streptavidin-Pacific blue (invitrogen). IL-4-APC (8D4-8, eBioscience), Perforin-biotinylated (Pf-344, Mabtech)