TNF and diabetes mellitus: Diabetes resulted in a noticeable increase in IL-6 (26.5 ± 6.3 vs 17.1 ± 4.7 pg/mg protein, P < 0.05) and TNF-α (89.7 ± 10.2 vs 55.9 ± 9.5 pg/mg protein, P < 0.05) compared with the control group.