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ORIGINAL ARTICLE
Year : 2014  |  Volume : 3  |  Issue : 1  |  Page : 173

Effects of melatonin on biochemical factors and food and water consumption in diabetic rats


1 Department of Physiology, School of Medicine, North Khorasan University of Medical Sciences, Bojnourd, Iran
2 Neurocognitive Research Center and Department of Physiology, Mashhad University of Medical Sciences, Mashhad, Iran
3 Department of Physiology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
4 Department of Biochemistry, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran

Correspondence Address:
Mousa-Al-Reza Hadjzadeh
Neurocognitive Research Center and Department of Physiology, School of Medicine, Mashhad University of Medical Sciences, Mashhad
Iran
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Source of Support: Council of Research, Mashhad University of Medical Sciences, Conflict of Interest: None


DOI: 10.4103/2277-9175.139191

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Background: Diabetic neuropathy is one of the serious problems due to microvessel vasculopathy in diabetes. It has been reported that hyperglycemia and hypertriglyceridemia are the underlying mechanisms in inducing and progression of diabetic neuropathy. The aim of the present study was to investigate the effects of melatonin on serum glucose and lipid levels, as well as food consumption and water intake in streptozotocin-induced diabetic rats. Materials and Methods: Eighty male Wistar rats were randomly assigned to six groups including; normal control group, diabetic control group and 4 diabetic experimental groups that received melatonin intraperitoneally at doses of 2.5, 5, 10, and 20 mg/kg at the end of sixth week after verification of neuropathy by means of evaluation of sciatic nerve conduction velocity (MNCV), for two weeks. Blood glucose and lipid levels, body weight, the amounts of food consumption, and water intake were determined in all groups at weeks 0 (before diabetes induction), 3, 6, and at the end of eighth week. Results: Treatment with melatonin reduced significantly the serum glucose (P < 0.001) and triglyceride (P < 0.05) levels, food consumption (P < 0.001), and water intake (P < 0.001) in diabetic rats at the end of eighth week. However, melatonin had no significant effect on body weight of diabetic animals. Conclusions: Treatment with melatonin could improve several signs of diabetes, including hyperglycemia, hypertriglyceridemia, polyphagia, and polydipsia. Therefore, melatonin may be used as an adjunct therapy in the treatment of diabetes.


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