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Aristolochic acid (AA) is a component identified in traditional Chinese remedies for the treatment of arthritic pain, coughs and gastrointestinal symptoms. However, previous studies have indicated that AA can induce oxidative stress in renal cells leading to nephropathy. α‑tocopherol exists in numerous types of food, such as nuts, and belongs to the vitamin E isoform family. It possesses antioxidant activities and has been used previously for clinical applications. Therefore, the aim of the present study was to determine whether α‑tocopherol could reduce AA‑induced oxidative stress and renal cell cytotoxicity, determined by cell survival rate, reactive oxygen species detection and apoptotic features. The results indicated that AA markedly induced H2O2 levels and caspase‑3 activity in renal tubular epithelial cells. Notably, the presence of α‑tocopherol inhibited AA‑induced H2O2 and caspase‑3 activity. The present study demonstrated that antioxidant mechanisms of α‑tocopherol may be involved in the increased survival rates from AA‑induced cell injury.

molecular medicine reports

Vitamin E (α‑tocopherol) ameliorates aristolochic acid‑induced renal tubular epithelial cell death by attenuating oxidative stress and caspase‑3 activation