However, CAT level decreased in diabetes (P<0.001), groups IV (P<0.01), VI (P<0.001), VIII and IX (P<0.05) when compared to control, but this variable increased in groups II (P<0.001), IV (P<0.05), V (P<0.001), VII, VIII (P<0.01), and IX (P<0.01) versus diabetes group (Figure 1D). This evidence concerns the gene CAT and diabetes mellitus.