CD38 expression on myeloid, natural killer (NK) and T cells in peripheral blood mononuclear cells (PBMC) from healthy donors and patients with systemic lupus erythematosus (SLE) and rheumatoid arthritis (RA). a Quantification of CD38 MFI on CD56 + CD16 + NK cells, CD11c + classical DC, and BDCA2 + plasmacytoid dendritic cells (DC). b Quantification of CD38 MFI on CD45RA + naïve T cells, CD62L hi CD27 hi CCR7 + CD45RA − central memory T cells (T CM ) and CD62L − CD45RA − effector memory T cell (T EM ). c Representative fluorescence-activated cell sorting (FACS) plot of CD38 expression on CD4 + CD127 low CD25 hi T regulatory cells (Tregs). d Proportion of the CD38 bri subset in peripheral Tregs from healthy controls and donors with SLE or RA
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