In diabetic mice, low-dose IL-2 increased Foxp3+ cells in the retina compared with non-diabetic and diabetic controls (untreated diabetes: 3.01 ± 0.41 vs diabetes + low-dose Il-2: 5.90 ± 1.25 cells per field, p<0.001) (Fig. 6). Here, IL2 is linked to diabetes mellitus.