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The Role of Ca3 Gabab Receptors on Anxiolytic-Like Behaviors and Avoidance Memory Deficit Induced by D-Ap5 With Respect to Ca2 + Ions Publisher Pubmed



Zarrabian S1 ; Nasehi M1, 2 ; Farrahizadeh M1 ; Zarrindast MR1, 2, 3, 4, 5, 6
Authors
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Authors Affiliations
  1. 1. Cognitive and Neuroscience Research Center (CNRC), Tehran Medical Sciences Branch, Islamic Azad University, Tehran, Iran
  2. 2. Institute for Cognitive Science Studies (ICSS), Tehran, Iran
  3. 3. Department of Pharmacology School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
  4. 4. Iranian National Center for Addiction Studies, Tehran University of Medical Sciences, Tehran, Iran
  5. 5. School of Cognitive Sciences, Institute for Research in Fundamental Sciences (IPM), Tehran, Iran
  6. 6. Medical Genomics Research Center, Tehran Medical Sciences Branch, Islamic Azad University, Tehran, Iran

Source: Progress in Neuro-Psychopharmacology and Biological Psychiatry Published:2017


Abstract

Glutamatergic and GABAergic systems play key roles in the hippocampus and affect the pathogenesis of anxiety- and memory-related processes. Some investigations have assessed the role of balancing the function of these two systems in different areas of the central nervous system (CNS) as an approach to manage the related disorders. We investigated the anxiety and avoidance memory states using the test-retest protocol in the elevated plus maze to understand the role of GABAB receptors (GABABRs) in relation to the NMDA receptor blockade by D-AP5 (an NMDA receptor antagonist). Also, we examined the function of Ca2 + ions by blocking its entrance to the cell using SKF96365 (a Ca2 + channel blocker). The drugs were injected into the CA3 region before the test. Our data showed that D-AP5 induced anxiolytic-like behaviors and impaired the avoidance memory. Injection of baclofen (a GABABR agonist), but not phaclofen (a GABABR antagonist) induced anxiolytic-like behaviors. Neither baclofen nor phaclofen altered avoidance memory-related behaviors. When baclofen was injected before D-AP5, it potentiated the anxiolytic-like behaviors induced by D-AP5, but counteracted its effect on avoidance memory. Phaclofen pretreatment attenuated D-AP5-induced anxiolytic-like behaviors, but potentiated its effect on avoidance memory. The effect of baclofen application before D-AP5 on anxiety and phaclofen application before D-AP5 on avoidance memory at the heist doses were accompanied by a decrease in locomotion. The application of SKF96365 did not alter anxiety-like behaviors but induced avoidance memory impairment. SKF96365 application before the combination of baclofen and D-AP5 counteracted the effects produced by the combination of baclofen and D-AP5 on anxiety and memory states. Our findings showed that the CA3 GABABRs had a critical role in anxiolytic-like behaviors and avoidance memory deficit induced by D-AP5 and confirmed the role of Ca2 + ions in the observed results. © 2017 Elsevier Inc.
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