Conversely, IL-2 levels in the SLE-A group were significantly lower than those in the SLE-nA (2.70 ± 2.03 vs. 4.39 ± 2.97, p<0.05) and HC groups (2.70 ± 2.03 vs. 13.27 ± 7.29, p<0.001). Here, IL2 is linked to systemic lupus erythematosus.