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KMID : 0811720100140050345
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Korean Journal of Physiology & Pharmacology
2010 Volume.14 No. 5 p.345 ~ p.352
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Effects of Erythropoietin on Memory Deficits and Brain Oxidative Stress in the Mouse Models of Dementia
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Kumar Rohit
Jaggi Amteshwar Singh
Singh Nirmal
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Abstract
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The present study was undertaken to explore the potential of erythropoietin in memory deficits of mice. Memory impairment was produced by scopolamine (0.5 mg/kg, i.p.) and intracerebroventricular streptozotocin (i.c.v STZ, 3 mg/kg, 10?l, 1st and 3rd day) in separate groups of animals. Morris water- maze test was employed to assess learning and memory. The levels of brain thio-barbituric acid reactive species (TBARS) and reduced glutathione (GSH) were estimated to assess degree of oxidative stress. Brain acetylcholinesterase enzyme (AChE) activity was also measured. Scopolamine/streptozotocin administration induced significant impairment of learning and memory in mice as indicated by marked decrease in Morris water-maze performance. Scopolamine/streptozotocin administration also produced a significant enhancement of brain AChE activity and brain oxidative stress (an increase in TBARS and a decrease in GSH) levels. Treatment of erythropoietin (500 and 1,000 IU/Kg i.p.) significantly reversed scopolamine- as well as streptozotocin-induced learning and memory deficits along with attenuation of those-induced rise in brain AChE activity and brain oxidative stress levels. It may be concluded that erythropoietin exerts a beneficial effect in memory deficits of mice possibly through its multiple actions including potential anti-oxidative effect.
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KEYWORD
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Erythropoietin, Memory, Scopolamine, Streptozotocin, Morris water-maze
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