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Avicenna Journal of Phytomedicine، جلد ۱۲، شماره ۲، صفحات ۱۶۳-۱۷۴
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عنوان انگلیسی Olea europaea L. (olive) leaf extract ameliorates learning and memory deficits in streptozotocin-induced diabetic rats
چکیده انگلیسی مقاله Objective: The aim of the present study was to assess olive leaf extract (OLE) effects on learning and memory deficits in a model of diabetes induced by streptozotocin (STZ) in rats.Materials and methods: The rats were divided as: (1) control rats, (2) diabetic rats, and (3–6) diabetic rats treated by 100, 200, and 400 mg/kg of OLE or metformin. Using the passive avoidance test (PA), we investigated fear learning and memory behaviors. In cortical and hippocampus tissues, total levels of malondialdehyde (MDA) and thiol were measured along with the activity of catalase (CAT) and superoxide dismutase (SOD).Results: Learning and memory behavior impairment were significantly developed in diabetic rats as shown by the impairment of the PA task compared to the control group (p< 0.001). In addition, elevated levels of MDA and reduced overall concentrations of thiol, CAT and SOD activity were obvious in diabetic rats’ cortex and hippocampus tissues (p< 0.01–p< 0.001). Meanwhile, OLE in a dose-dependent manner, improved memory deficit and cognitive performance that was attributed to a reduction of lipid peroxidation and elevation of total thiol concentration, and CAT and SOD activity levels in the brain tissues (p< 0.05–p< 0.001).Conclusion: OLE could be effective in improving cognitive impairment in STZ-induced diabetes by oxidative stress depression.
کلیدواژه‌های انگلیسی مقاله Diabetes, Oxidative stress, Memory, Olive leaf extract
نویسندگان مقاله | Ali Akbar Asghari
Department of Physiology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran


| Mahmoud Hosseini
Division of Neurocognitive Sciences, Psychiatry and Behavioral Sciences Research Center, Mashhad University of Medical Sciences, Mashhad, Iran


| Soleyman Bafdam
Department of Physiology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran


| Hasan Rakhshandeh
Pharmacological Research Center of Medicinal Plants, Mashhad University of Medical Sciences, Mashhad. Iran


| Maryam Farazandeh
Department of Physiology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran


| Maryam Mahmoudabady
Department of Physiology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran. Applied Biomedical Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
نشانی اینترنتی https://ajp.mums.ac.ir/article_18989.html
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نوع مقاله منتشر شده Original Research Article
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