IL7 and Arthritis: Further, IL-7 demonstrated statistically significant higher levels at baseline (mean change 4.85 [IQR2.93–8.05], p = 0.017) compared to IL-17Ai non-responders (mean change 2.77 [1.60–4.90], p = 0.017) (Table S1) suggesting the inflammatory character of IL-7 that has been associated with Th1 cytokine secretion in joints of patients with arthritis [23].