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Digestive Diseases and Sciences

, Volume 58, Issue 4, pp 959–969 | Cite as

Preclinical Efficacy of Melatonin to Reduce Methotrexate-Induced Oxidative Stress and Small Intestinal Damage in Rats

  • Viswa Kalyan Kolli
  • Premila Abraham
  • Bina Isaac
  • N. Kasthuri
Original Article

Abstract

Background

Methotrexate is widely used as a chemotherapeutic agent for leukemia and other malignancies. The efficacy of this drug is often limited by mucositis and intestinal injury, which are the major causes of morbidity in children and adults.

Aim

The present study investigates whether melatonin, a powerful antioxidant, could have a protective effect.

Method

Rats were pretreated with melatonin (20 and 40 mg/kg body weight) daily 1 h before methotrexate (7 mg/kg body weight) administration for three consecutive days. After the final dose of methotrexate, the rats were sacrificed and the small intestine was used for light microscopy and biochemical assays. Intestinal homogenates were used for assay of oxidative stress parameters malondialdehyde and protein carbonyl content, and myeloperoxidase activity, a marker of neutrophil infiltration as well as for the activities of the antioxidant enzymes.

Result

Pretreatment with melatonin had a dose-dependent protective effect on methotrexate (MTX)-induced alterations in small intestinal morphology. Morphology was saved to some extent with 20 mg melatonin pretreatment and near normal morphology was achieved with 40 mg melatonin pretreatment. Biochemically, pretreatment with melatonin significantly attenuated MTX-induced oxidative stress (P < 0.01 for MDA, P < 0.001 for protein carbonyl content) and restored the activities of the antioxidant enzymes (glutathione reductase P < 0.05, superoxide dismutase P < 0.01).

Conclusion

The results of the present study demonstrate that supplementation by exogenous melatonin significantly reduces MTX-induced small intestinal damage, indicating that it may be beneficial in ameliorating MTX-induced enteritis in humans.

Keywords

Methotrexate Melatonin Small intestinal damage Oxidative stress Rat 

Notes

Acknowledgment

The authors acknowledge the Council for Scientific and Industrial Research (CSIR), New Delhi for the financial support for the study. Mr. Viswa Kalyan Kolli is a senior research fellow on the present study.

Conflict of interest

None.

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Copyright information

© Springer Science+Business Media New York 2012

Authors and Affiliations

  • Viswa Kalyan Kolli
    • 1
  • Premila Abraham
    • 1
  • Bina Isaac
    • 2
  • N. Kasthuri
    • 1
  1. 1.Department of BiochemistryChristian Medical CollegeBagayam, VelloreIndia
  2. 2.Department of AnatomyChristian Medical CollegeBagayam, VelloreIndia

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