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Nmda Receptor Adjusted Co-Administration of Ecstasy and Cannabinoid Receptor-1 Agonist in the Amygdala Via Stimulation of Bdnf/Trk-B/Creb Pathway in Adult Male Rats Publisher Pubmed



Ashabi G1 ; Sadatshirazi MS2, 3 ; Khalifeh S4 ; Elhampour L2 ; Zarrindast MR2, 4, 5, 6, 7, 8
Authors
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Authors Affiliations
  1. 1. Department of Physiology, Faculty of Medicine, Tehran University of Medical Sciences, Tehran, Iran
  2. 2. Iranian National Center for Addiction Studies (INCAS), Tehran University of Medical Sciences, Tehran, Iran
  3. 3. Department of Neuroscience, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
  4. 4. Cognitive and Neuroscience Research Center (CNRC), Tehran Medical Sciences Branch, Islamic Azad University, Tehran, Iran
  5. 5. Institute for Cognitive Science Studies (ICSS), Tehran, Iran
  6. 6. Department of Pharmacology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
  7. 7. Cognitive Sciences, Institute for Research in Fundamental Sciences (IPM), Tehran, Iran
  8. 8. Medical Genomics Research Center, Tehran Medical Sciences Branch, Islamic Azad University, Tehran, Iran

Source: Brain Research Bulletin Published:2017


Abstract

Consumption of cannabinoid receptor-1 (CB-1) agonist such as cannabis is widely taken in 3,4- methylenedioxymethamphetamine (MDMA) or ecstasy users; it has been hypothesized that co-consumption of CB-1 agonist might protect neurons against MDMA toxicity. N-methyl-D-aspartate (NMDA) receptors regulate neuronal plasticity and firing rate in the brain through Tyrosine-kinase B (Trk-B) activation. The molecular and electrophysiological association among NMDA and MDMA/Arachidonylcyclopropylamide (ACPA, a selective CB-1 receptor agonist) co-consumption was not well-known. Here, neuronal spontaneous activity, Brain-derived neurotrophic factor (BDNF), Trk-B and cAMP response element binding protein (CREB) phosphorylation levels were recognized in ACPA and MDMA co-injected rats. Besides, we proved the role of NMDA receptor on MDMA and ACPA combination on neuronal spontaneous activity and Trk-B/BDNF pathway in the central amygdala (CeA). Male rats were anesthetized with intra-peritoneal injections of urethane; MDMA, D-2-amino-5-phosphonopentanoate (D-AP5, NMDA receptor antagonist) were injected into CeA. ACPA was administrated by intra-cerebroventricular injection. Thirty minutes following injections, neuronal firing rate was recorded from CeA. Two hours after drug injection, amygdala was collected from brain for molecular evaluations. Single administration of MDMA and/or ACPA reduced firing rates compared with sham group in the CeA dose-dependently. Injection of D-AP5, ACPA and MDMA reduced firing rate compared with sham group (P < 0.001). Interestingly, injection of ACPA + MDMA enhanced BDNF, Trk-B and CREB phosphorylation compared with MDMA groups. D-AP5, ACPA and MDMA co-injection decreased BDNF, Trk-B and CREB phosphorylation levels compared with ACPA + MDMA in the amygdala (P < 0.01). Probably, NMDA receptors are involved in the protective role of acute MDMA + ACPA co-injection via BDNF/Trk-B/CREB pathways. © 2017 Elsevier Inc.
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