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:: Volume 28, Issue 3 (8-2020) ::
Journal of Ilam University of Medical Sciences 2020, 28(3): 1-10 Back to browse issues page
The Role of Middle Septal Ghrelin Receptors in the Effects of Morphine on Memory Consolidation in Passive Avoidance Learning
Soudabe Dastjani-Farahani1 , Niloufar Darbandi * 2
1- Department of Biology, Faculty of Science, Arak University, Arak , 38156-8-8349, Iran
2- Dept of Biology, Faculty of Science, Arak University, Arak, Iran , N-Darbandi@araku.ac.ir
Abstract:   (1920 Views)
Introduction: Evidence indicates that morphine impairs memory process. Ghrelin hormone has been linked to learning and memory processes and modulates reward properties of addictive drugs. In this study we examined the role of middle septal ghrelin receptors in the effects of morphine on memory consolidation in passive avoidance learning.
 
Materials & Methods: In this experimental study, 91 male Wistar rats were randomly divided into 13 (n=7) groups: saline (1ml/kg), morphine (0.5- 7.5 mg/kg), ghrelin (0- 1 nmol/μl) plus morphine (7.5 mg/kg) or saline (1ml/kg). In ghrelin treated groups animals received intra- medial Septum injection of ghrelin immediately after training and 5 min later saline or morphine was injected subcutaneously. Testing phase was done 24 h after training. Data were analyzed using ANOVA analysis followed by Tukey multiple comparison test. Ethics code: IR.ARAKMU.REC.1397.215
 
Findings: Post-training administration of morphine reduced step-through latency and increased Total dark chamber compared with saline group (p< 0.001). Intra- medial Septum injection of ghrelin inhibited morphine-induced amnesia (p< 0.001). Administration of ghrelin alone had no significant effect on memory retrieval (P > 0.05).
 
Disscution & Conclusions: Ghrelin is able to prevent the deleterious effects of morphine on memory and learning in the inhibitory avoidance model and the medial septal region may be involved in this effect.
 
Keywords: Ghrelin, Inhibitory avoidance learning, Medial septum, Morphine, Male rat
Full-Text [PDF 985 kb]   (586 Downloads)    
Type of Study: Research | Subject: physiology
Received: 2019/10/27 | Accepted: 2020/02/8 | Published: 2020/08/31
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Dastjani-Farahani S, Darbandi N. The Role of Middle Septal Ghrelin Receptors in the Effects of Morphine on Memory Consolidation in Passive Avoidance Learning. Journal of Ilam University of Medical Sciences 2020; 28 (3) :1-10
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Volume 28, Issue 3 (8-2020) Back to browse issues page
مجله دانشگاه علوم پزشکی ایلام Journal of Ilam University of Medical Sciences
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