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Qom Univ Med Sci J 2013, 7(1): 1-10 Back to browse issues page
Evaluation of the Interaction between NMDA Receptors of Nucleus Accumbens and Muscarinic Receptors in Memory
Bahareh Pakpour 1, Shahrbanou Oryan2, Majid Navaeian3, Saba Taheri4, Morteza Piri5
1- Islamic Azad University, Tehran Branch , biopakpour@gmail.com
2- Tarbiat Moallem University
3- Islamic Azad University, Shahre-Ray Branch
4- Islamic Azad University, Islamshahr Branch
5- Islamic Azad University, Ardabil Branch
Abstract:   (3785 Views)

Background and Objectives: Whereas studies have indicated the interaction between NMDA and cholinergic systems, this study was performed with the aim of determining the role of NMDA receptors in the nucleus accumbens (NAc) in scopolamine-induced amnesia.   Methods: In this study, at first rats were anesthetized with intra-peritoneal injection of ketamine hydrochloride plus xylazine, and then placed in a stereotaxic apparatus. Two stainless-steel cannulas were placed 2mm above nucleus accumbens shell. All animals were allowed to recover for one week, before beginning the behavioral testing. Then, animals were trained in a step-through type inhibitory avoidance task. The drugs were injected after successful training and before testing. The animals were tested 24h after training, and the step-through latency time was measured as the memory criterion in male Wistar rats. One-way analysis of variance and Tukey’s test were used for analysis of the data. p<0.05 was considered statistically significant.   Results: Intra-nucleus accumbens (intra-NAc) injection of scopolamine or NMDA caused impairment in memory in rats. Although, co-administration of an ineffective dose of NMDA with an ineffective dose of scopolamine had no significant effect on memory performance, effective doses of NMDA prevented the amnesic effect of scopolamine on inhibitory avoidance memory. On the other hand, intra-NAc injection of NMDA receptor antagonist, i.e., MK-801 caused no change in memory performance by itself, and its co-administration with an effective dose of scopolamine could not prevent the impairing effect of the latter drug.   Conclusion: The finding of this study indicated that NMDA receptors in the nucleus accumbens are involved in the modulation of scopolamine-induced amnesia.

Keywords: Passive Avoidance Learning, N-methylaspartate, Scopolamine Hydrobromide, Dizocilpine Maleate, Rats
Full-Text [PDF 464 kb]   (1187 Downloads)    
Type of Study: Original Article |
Received: 2016/02/13 | Accepted: 2016/02/23 | Published: 2016/02/23
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Pakpour B, Oryan S, Navaeian M, Taheri S, Piri M. Evaluation of the Interaction between NMDA Receptors of Nucleus Accumbens and Muscarinic Receptors in Memory. Qom Univ Med Sci J. 2013; 7 (1) :1-10
URL: http://journal.muq.ac.ir/article-1-131-en.html

Volume 7, Issue 1 (4-2013) Back to browse issues page
مجله دانشگاه علوم پزشکی قم Qom University of Medical Sciences Journal
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