Apart from the anticancer, antioxidant, anti-inflammatory effects, and inhibition of aromatase, chrysin is involved in the protection of cardiovascular disorders. Cardiovascular complications are the main cause of death induced by aluminum phosphide (AlP) which is related to oxidative stress and mitochondrial damages. For this purpose, we investigated the effect of chrysin as an antioxidant and mitochondrial protective agent against AlP-induced toxicity in isolated cardiomyocytes and mitochondria obtained from rat heart ventricular. Using by biochemical and flow cytometry, cell viability, reactive oxygen species (ROS) formation, mitochondria membrane potential (MMP), lysosomal membrane integrity, malondialdehyde (MDA) content, and glutathione (GSH) and oxidized glutathione (GSSG) content were measured in isolated cardiomyocytes. Also, mitochondrial toxicity parameters such as mitochondrial NADH/succinate dehydrogenase activity, mitochondrial swelling, ROS formation, MMP collapse, and lipid peroxidation were analyzed in isolated mitochondria. Our results showed that the administration of chrysin (up to 10 μM) efficiently decreased (P < 0.05) cytotoxicity, oxidative, lysosomal, and mitochondrial damages induced by AlP, in isolated cardiomyocytes. Also, our finding in isolated mitochondria showed that chrysin (up to 10 μM) significantly (P < 0.05) decreased AlP-induced mitochondrial toxicity. These findings demonstrated that chrysin as an antioxidant and mitochondrial protective agent exert protective effect in wild-type cardiomyocyte treated with AlP. It was concluded that chrysin significantly reduced the toxicity of AlP in isolated cardiomyocytes and mitochondria. Due to the very low toxicity of chrysin for humans, it could be a promising agent in treatment of AlP poisoning.
Keywords: aluminum phosphide; cardiomyocytes; cardiotoxicity; chrysin; mitochondria.
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