Abstract
The present study investigated the protective efficacy of DL-α-lipoic acid on the cyclophosphamide (CP)-induced clastogenicity using the in vivo micronucleus assay. Male Wistar rats of 140 ± 20 g were categorized into eight groups. Five groups were administered CP (40 mg/kg body weight, intraperitonealy) to induce genotoxicity; four of these groups received a single intraperitoneal injection of lipoic acid at a dose of either 100 or 200 mg/kg body weight, and either 30 or 60 min prior to CP administration. A vehicle-treated control group and lipoic acid control groups were also included. The number of micronucleated polychromatic erythrocytes (MNPCEs) was determined at 24 h after CP administration. In rats injected with CP, the frequency of MNPCEs in bone marrow and peripheral blood was increased significantly in comparison with the controls, and in rats treated with lipoic acid and CP, the number of MNPCEs was decreased significantly in comparison to those given CP alone. The chemoprotective effect was found to be stronger after the administration of lipoic acid at a dose of 200 mg/kg body weight than 100 mg/kg body weight dosage, indicating the dose-dependent protective effect of lipoic acid. However, the protection by lipoic acid was not dependent on the time intervals between lipoic acid and CP administration. Our results illustrate the protective effect of lipoic acid on the in vivo clastogenicity induced by CP.
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Acknowledgments
The authors, Selvakumar and Prahalathan gratefully acknowledge the financial assistance in the form of Senior Research Fellowship by the Indian Council of Medical Research (ICMR), New Delhi, India. We are grateful to Dr. P.R. Deepa for her valuable assistance in preparing this manuscript.
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Selvakumar, E., Prahalathan, C., Sudharsan, P.T. et al. Protective effect of lipoic acid on micronuclei induction by cyclophosphamide. Arch Toxicol 80, 115–119 (2006). https://doi.org/10.1007/s00204-005-0015-7
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DOI: https://doi.org/10.1007/s00204-005-0015-7