Isfahan University of Medical Sciences

Science Communicator Platform

Stay connected! Follow us on X network (Twitter):
Share this content! On (X network) By
The Influence of Electrical Stimulation on Dorsal Raphe Nucleus With Different Current Intensities on Morphine-Induced Conditioned Place Preference in Male Rats Publisher Pubmed



Ghavipanjeh GR1 ; Pourshanazari AA1 ; Alaei H1 ; Karimi S2
Authors
Show Affiliations
Authors Affiliations
  1. 1. Department of Physiology, Faculty of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
  2. 2. Department of Physiology, Faculty of Sciences, Payam Noor Isfahan University, Isfahan, Iran

Source: Pharmacological Reports Published:2015


Abstract

Introduction The dorsal raphe nucleus (DRN) influences a wide range of behavioral and physiological processes. The purpose of the present study was to test the effects of electrical stimulation of the DRN with different current intensities on morphine-induced conditioned place preference (CPP). Materials and methods Male Wistar rats were divided for experimental groups (n = 7). Stimulating electrodes were stereotaxically implanted into the DRN in anesthetized rats. We investigated the influences of electrical stimulation of the DRN with different current intensities with ineffective and effective dose of morphine (0.5 and 2.5 mg/kg, respectively) on morphine-induced CPP. Result Subcutaneous administration of morphine 2.5 mg/kg produced significant CPP in comparison with saline group. The stimulation of the DRN with different current intensities (10, 25, 50 and 100 μA) in combination with an effective dose of morphine did not show significant differences on acquisition phases, whereas there were significant decreases on expression phases versus to the morphine group on CPP only in current intensity 100 μA. The stimulation of the DRN with different current intensities in combination with an ineffective dose of morphine showed significant increases in current intensities (50 and 100 μA) on acquisition phases of CPP, but did not show significant differences on expression phases versus to the morphine group on CPP. Conclusion It is possible that electrical stimulation of the DRN with changes in concentration of serotonin or involving other transmitters such as glutamate and GABA would be involved with these changes of CPP. © 2015 Institute of Pharmacology, Polish Academy of Sciences. Published by Elsevier Sp. z o.o. All rights reserved.
Experts (# of related papers)
Other Related Docs
11. Blockade of Prelimbic Glutamate Receptor Reduces the Reinforcing Effect of Morphine, Canadian Journal of Physiology and Pharmacology (2018)
12. Effects of Angiotensin Ii and Captopril on Rewarding Propreties of Morphine, Indian Journal of Experimental Biology (2007)
17. The Role of Gabab Receptors in Morphine Self-Administration, International Journal of Preventive Medicine (2013)
31. Forced Exercise Improves Passive Avoidance Memory in Morphine-Exposed Rats, Pakistan Journal of Biological Sciences (2009)
50. Effect of Morphine Self-Administration on Water and Food Intake in Rat, Iranian Journal of Basic Medical Sciences (2007)