Chemicals and drugs
AMI and IMI were provided by Al-Kahira Pharmaceuticals (Cairo, Egypt) and Alexandria Pharmaceuticals (Alexandria, Egypt), respectively. Rotenone and dimethyl sulfoxide (DMSO) were purchased from Sigma–Aldrich (St. Louis, MO, USA) and Merck (Darmstadt, Germany), respectively. All other chemicals were of the highest purity and analytical grade.