Finally, Teff from untreated RA and PsA patients according to their DAS28-CRP or CRP level, respectively, showed enhanced IFN-γ and IL-17A production by CD73+ Teff in patients with active RA (DAS28-CRP ≥ 3.2), although not reaching statistical significance (Figure 2C). Here, IL17A is linked to rheumatoid arthritis.