T2D had lower expression of SOD1 (−62%; p < 0.001) and ETC complex V (−34%; p = 0.003), along with higher expression of ETC complex IV (+66%; p = 0.007), MFN2 (+62%; p = 0.001), and DRP1 (+30%; p = 0.028) compared to ND. This evidence concerns the gene MFN2 and type 2 diabetes mellitus.