Comparison of Memory Impairment and Oxidative Stress Following Single or Repeated Doses Administration of Scopolamine in Rat Hippocampus.

Content Provider	Europe PMC
Author	Rahimzadegan, Milad Soodi, Maliheh
Copyright Year	2018
Abstract	Introduction:Scopolamine, a muscarinic cholinergic receptor antagonist, is widely used to induce memory impairment in experimental animals. The present study aims to compare memory impairment and oxidative stress following single and repeated doses administration of scopolamine.Methods:A group of rats received a single shot of scopolamine in different doses (0.5, 1, or 3 mg/kg, IP) 24 hours after the passive avoidance training. Then the memory retrieval test was performed 30 minutes and 7 days after the injection. In the other experiment, rats received similar doses of scopolamine for 7 consecutive days, 24 hours after the training session. Then the memory retrieval test was performed 30 minutes and 7 days after the last injection. Acetylcholinesterase (AChE) activity and lipid peroxidation were measured in their hippocampus tissue, too.Results:Scopolamine administered in repeated doses caused more impairment in memory function compared to single dose injection based on the evaluation 30 minutes after injection. Moreover, the memory impairment persisted for 7 days only in repeated doses treated groups. Increase in acetylcholinesterase activity and lipid peroxidation in both groups was observed 30 minutes after scopolamine administration. These abnormal increases persisted for 7 days only in repeated doses treated groups. Increased AChE activity and lipid peroxidation was well correlated with behavioral deficit. Also AChE activity was well associated with lipid peroxidation.Conclusion:The results of present study showed that repeated administration of scopolamine induced results in memory impairment. This effect can be due to long-lasting oxidative stress which may damage the hippocampus tissue.
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ISSN	2008126X
Journal	Basic and Clinical Neuroscience [Basic Clin Neurosci]
Volume Number	9
PubMed Central reference number	PMC6015638
Issue Number	1
PubMed reference number	29942435
e-ISSN	22287442
DOI	10.29252/nirp.bcn.9.1.5
Language	English
Publisher	Iranian Neuroscience Society
Publisher Date	2018-01-01
Access Restriction	Open
Rights License	This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Copyright© 2018 Iranian Neuroscience Society
Subject Keyword	Scopolamine Oxidative stress Acetylcholinesterase Memory
Content Type	Text
Resource Type	Article
Subject	Neurology (clinical) Cellular and Molecular Neuroscience