The clinical use of arsenic trioxide (ATO) is often limited because of its adverse effects. We examined whether α-lipoic acid (LA) protects against the ATO-induced cardiac toxicity. In the chronic study, two of four rats suddenly died by the repeated dosing of ATO, whereas no deaths were observed in combination with LA. In the acute study, continuous ECG recording revealed that intravenous injection of ATO caused transient ST-T change, whereas preresults with LA abolished the ATO-induced ECG abnormality in all animals. These results suggest that LA protects against the ATO-induced acute cardiac toxicity and subsequent sudden death in rats.
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