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The present study aimed to investigate the hepatoprotective effects of the bioflavonoid quercetin (QR) on cisplatin (CP)‑induced mitochondrial oxidative stress in the livers of rats, to elucidate the role of mitochondria in CP‑induced hepatotoxicity, and its underlying mechanism. Isolated liver mitochondria were incubated with 100 µg/ml CP and/or 50 µM QR in vitro. CP treatment triggered a significant increase in membrane lipid peroxidation (LPO) levels, protein carbonyl (PC) contents, and a decrease in reduced glutathione (GSH) and non‑protein thiol (NP‑SH) levels. In addition, CP caused a marked decline in the activities of enzymatic antioxidants and mitochondrial complexes (I, II, III and V) in liver mitochondria. QR pre‑treatment significantly modulated the activities of enzymatic antioxidants and mitochondrial complex enzymes. Furthermore, QR reversed the alterations in LPO and PC levels, and GSH and NP‑SH contents in liver mitochondria. The results of the present study suggested that QR supplementation may suppress CP‑induced mitochondrial toxicity during chemotherapy, and provides a potential prophylactic and defensive candidate for anticancer agent‑induced oxidative stress.

Ameliorative efficacy of quercetin against cisplatin-induced mitochondrial dysfunction: Study on isolated rat liver mitochondria