Fig. 6.

Effect of leptin on superoxide dismutase (SOD) activity. Monocytes were incubated with leptin (16 ng/ml and 160 ng/ml) for 30 min and 1 and 2 h/37 °C, lysed and assayed for SOD activity. The arithmetic means of at least six experiments are shown. Error bars indicate standard deviations (SDs). The level of significance of the differences between the samples was calculated by ANOVA with a Student–Newman–Keuls post-test. *P < 0.05 versus the respective control sample of the appropriate time point