IL6 and type 2 diabetes mellitus: Compared with normal control group, the levels of TNF-α and IL-2 in serum were increased significantly in T2DM + OU group (P < 0.01), and the levels of IL-1β, IL-2, IL-6 and TNF-α presented obviously high in T2DM + SH + OU group (P < 0.05).