However, treatment with blue-AuNPs or purple-AuNPs, 200 mg/kg/day, IP) respectively, for 14 successive days in rats with isoproterenol-induced myocardial infarction resulted in a significant increase in the activity of antioxidant enzymes GSH, and SOD when compared to the ISO-treatment alone (p < 0.05), Figure 7. The gene discussed is SOD1; the disease is myocardial infarction.