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Protective effect of melatonin in the diabetic rat retina
Author(s) -
Mehrzadi Saeed,
Motevalian Manijeh,
Rezaei Kanavi Mozhgan,
Fatemi Iman,
Ghaznavi Habib,
Shahriari Mansoor
Publication year - 2018
Publication title -
fundamental and clinical pharmacology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.655
H-Index - 73
eISSN - 1472-8206
pISSN - 0767-3981
DOI - 10.1111/fcp.12361
Subject(s) - diabetes mellitus , diabetic retinopathy , streptozotocin , melatonin , medicine , malondialdehyde , retina , endocrinology , fluorescein angiography , retinal , fluorescein , ophthalmology , oxidative stress , biology , physics , quantum mechanics , neuroscience , fluorescence
Diabetic retinopathy ( DR ) is one of the most common and serious microvascular complications of diabetes. The aim of this study was to evaluate the effects of melatonin ( MEL ) on retinal injury in diabetic rats. In this study, 21 rats were randomly divided into three groups: control, diabetic, and diabetic + MEL . Streptozotocin was used to induce diabetes at a dose of 50 mg/kg, i.p., and blood glucose was measured to choose the diabetic rats for the study. MEL (20 mg/kg) was given orally for 7 weeks in diabetic rats starting 1 week after induction of diabetes. After 8 weeks, the groups were compared in terms of mean scores of fluorescein leakage, using fluorescein angiography. Reactive oxygen species ( ROS ) and malondialdehyde ( MDA ) levels were estimated in retina using commercially available assays. Structural changes in retinas were evaluated by light microscopy. Results showed that diabetes significantly increased the mean scores of fluorescein leakage, and MDA and ROS levels compared to control group. Treatment of the diabetic rats with MEL for 7 weeks prevented the alterations induced by diabetes in comparison with the diabetic control group.Based on these findings, it can be concluded that MEL might have beneficial effects in prevention of DR .