Effect of high glucose and PKC inhibitor Ro-31-8220, NF-κB inhibitor BAY11-7082 on nuclear NF-κB expression in cardiomyocytes. Cardiomyocytes cultured in high glucose levels showed higher nuclear protein expression and activity of NF-κB compared with control group. After adding PKC inhibitor Ro-31-8220(50 nmol/L) and NF-κB inhibitor BAY11-7082(5 μmol/L) the expression and activity of nuclear NF-κB decreased as shown in figure 4. Treatment with mannital, used as an osmotic control, had no significant effect on the nuclear expression of NF-κB in cardiomyocytes. The results were expressed as means ± SE (n = 4 or 5). * P < 0.05 vs control group, #P < 0.05 vs high glucose group.