MAOA and diabetes mellitus: In the aorta, diabetes-induced the protein expression levels of glutathione peroxidase 1 (3.22 fold, p = 0.041) and 3 (2.12 fold, p = 0.004), glutathione S-transferase Pi 1 (2.04 fold, p = 0.021) and Mu 3 (16.78 fold, p = 0.039), monoamine oxidase A (2.67 fold, p = 0.049) and reduced the expression of superoxide dismutase 1 (0.7 fold, p = 0.044) compared to levels in aorta of control normal rats (Table A in S1 File).