1- Associate Professor, Neurophysiology Research Center, Hamadan University of medical Science, Hamadan, Iran 2- Professor, Department of Physiology and Neurophysiology Research Center, Hamadan University of medical Science, Hamadan, Iran. 3- Assistant Professor, Neurophysiology Research Center, Hamadan University of medical Science, Hamadan, Iran 4- Assistant Professor, Department of Physiology, Hamadan University of medical Science, Iran 5- Assistant Professor, Anatomical Sciences, Hamadan University of medical Science, Hamadan, Iran , m.ramezani@umsha.ac.ir
Abstract: (1425 Views)
Background and Aim: Serotonergic system has a role in morphine dependence and withdrawal symptomsvia its receptors. On the other hand, the effect of 5-HT2A receptor on withdrawal symptomshas not been evaluated completely. The aim of this study was to investigate the effect of 5-HT2A receptor stimulation on morphine withdrawal symptomsin male mice. Materials and Methods:This experimental study included twenty eight male NMRI mice (20-25g). Morphine dependency was induced in a five- day schedule by 6, 16, 26, 36, 46, 56 and 66 mg/kg doses respectively. On the fifth day, 2 hours after a single dose of morphine, naloxone was injected (3 mg/kg) and the scores (from 0 to 3) of withdrawal symptomsincluding number of jumps, teeth chattering, writing, head shakes, limbs shakes, and percentage of body weight loss were recorded for 30min.The treatment group received different doses of TCB-2 (03, and 2.5mg/kg; Intraperitoneally). Results: Withdrawal symptoms in the morphine-dependent mice were significantly more frequent than those in the control mice. Different doses of TCB-2 significantly increased some of the morphine withdrawal symptomsin the experimental groups. Conclusion: The present study indicated that stimulation of 5-HT2A receptor via its agonist exacerbated the morphine withdrawal symptoms. Further studies are recommended to better understand the role of the 5-HT2A receptor in morphine dependence and withdrawal.
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Hashemi-Firouzi N, Shahidi S, Afshar S, habibi P, Ramezani M. The effect of 5-HT2A receptor stimulation on morphine withdrawal symptoms in mice. SJKU 2023; 28 (2) :40-50 URL: http://sjku.muk.ac.ir/article-1-7320-en.html