Cryptotanshinone protects against adriamycin-induced mitochondrial dysfunction in cardiomyocytes

AbstractContext: The serious side effect of Adriamycin (ADR) is cardiomyopathy. Cryptotanshinone (CRY) is widely and safely used as antioxidant with MTD more than 5 mg/g in rats (p.o).Objective: The objective of this study is to study the protection effects of CRY against ADR-induced mitochondrial dysfunction in cardiomyocytes.Materials and methods: The chemical administration lasted for 20 days with an effective dose of CRY (p.o.) at 50 mg/kg in rats. Mitochondrial respiratory chain complex activities, ATP generation, mitochondrial membrane potential (MMP), superoxide anion free radical, oxidative stress-relative enzymes, and mitochondrial biogenesis-relative factors in normal control, ADR (i.p., 1.25 mg/kg), and ADR (i.p., 1.25 mg/kg) + CYP (p.o., 50 mg/kg) groups were detected.Results: 50 mg/kg CRY significantly promoted the energy production of ATP (16.99 ± 2.38 nmol/g Pro) (Pro: Protein) by increasing the complexes activities except II (p > 0.05). After the treatment of CRY, the suppressed MMP was in...