IL4 and systemic lupus erythematosus: As shown in Figure 5, the percentages of γδ T cells that express intracellular IFN-γ, IL-4, IL-10, and TGF-β in SLE patients (33.19 ± 20.20%, 1.04 ± 0.93%, 1.91 ± 0.98%, and 2.20 ± 1.97%, resp).