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Influence of Muscarinic Receptor Modulators on Interacerebroventricular Injection of Arachydonylcyclopropylamide Induced Antinociception in Mice Publisher Pubmed



Jafari MR1 ; Onsori S1 ; Fekrmandi F2 ; Tabrizian P1 ; Alipour M1 ; Zarrindast MR3
Authors
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Authors Affiliations
  1. 1. Department of Physiology and Pharmacology, School of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran
  2. 2. Department of Medicine, McGill University, McIntyre Medical Bldg., Rm. 1112, 3655 Drummond St., Montreal, H3G 1Y6, QC, Canada
  3. 3. Department of Pharmacology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran

Source: Physiology and Behavior Published:2015


Abstract

The interaction between antinociception induced by CB1 agonist and muscarinic receptor modulators has not been studied yet. In the present study, the effect of pilocarpine (a muscarinic agonist) and atropine (a muscarinic antagonist) on arachidonylcyclopropylamide (ACPA, a CB1 agonist) induced antinociception was studied in mice. In this study the antinociceptive effect of intracerebroventricular administration of ACPA (0.001-2. μg/mice) or intraperitoneal injection of pilocarpine (2.5-20. mg/kg) or atropine (1 and 5. mg/kg) were studied individually. Then the effect of co-administration of pilocarine (2.5. mg/kg) or atropine (5. mg/kg) and ACPA (0.001-2. μg/mice) were studied as well. ACPA and pilocarpine induced antinociception in mice but atropine did not. Pilocarpine potentiated but atropine antagonized the antinociceptive effect of ACPA. It is concluded that ACPA induced antinociception is influenced by muscarinic receptor modulators in mice. © 2014 Elsevier Inc.
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