SSAO activity and Cu levels in visceral fat. (A) The activity of SSAO in the visceral fat of obese patients is significantly higher than in lean controls. (B) The activity of SSAO is plotted against BMI values. (C) Cu levels measured per tissue weight are lower in obese subjects. (D) Cu levels normalized per protein content of visceral fat are higher in obese patients compared to lean controls. (E) Cu levels normalized to protein are plotted against BMI. (F) SSAO activity is plotted against the visceral fat Cu normalized to protein. (B, E, F, Pearson’s r and p values were calculated by using a linear regression analysis. Student’s t-test, ****p < 0.0001, ***p < 0.001, **p<0.01, *p<0.05, ns p>0.05. The data are presented as mean ± SEM.)