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Melatonin attenuated doxorubicin cardiotoxicity in rats; leaves open whether similar protection applies in patients.
Doxorubicin (DOX) is commonly used for the treatment of hematological and solid tumors. However, there are serious toxic effects on the cardiovascular system, which limits the application of the drug. Recently, melatonin has been reported to have immunomodulatory effect in addition to lowering cholesterol levels as well as inhibiting malignant tumors. In this study, the effect of melatonin against the toxicity of doxorubicin was investigated in rats. Hemodynamic function, pathological and biochemical changes were determined in different treated hearts. Our findings showed that a significant protection by melatonin (6 mg kg(-1) for 15 days, cumulative dose of 90 mg kg(-1)) against the DOX-induced toxicity was observed. Cardiac function was improved and lipid peroxidation decreased after melatonin treatment. It is concluded that melatonin provides protection against doxorubicin toxicity via an attenuation of lipid peroxidation.
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Xu et al. (2001) studied this question.
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