Abstract:
:In the present study, we investigated the possible participation of the endocannabinoid system in the basolateral amygdala and N-methyl-d-aspartate (NMDA) or GABA-A receptor neurotransmission in the ventral tegmental area in the memory consolidation impairment induced by morphine administration. To measure memory formation, step-through type passive avoidance apparatus was used with adult male Wistar rats. The results showed that intraperitoneal (i.p.) administration of morphine (3 and 6mg/kg) after the successful training phase had an amnestic effect and induced memory consolidation impairment. After training, injection of a selective cannabinoid CB1 receptor agonist, arachydonilcyclopropylamide (ACPA; 0.4-0.6ng/rat) plus systemic injection of an ineffective dose of morphine (0.5mg/kg, i.p.) into the basolateral amygdala impaired memory consolidation suggesting the facilitatory effect of ACPA on morphine response. Also, the results showed that the injection of bicuculline, a GABA-A receptor antagonist (0.3-0.5µg/rat) or NMDA (0.005-0.02µg/rat) into the ventral tegmental area reversed ACPA-induced potentiation of morphine response and improved memory consolidation. It should be considered that the injection of ACPA into the basolateral amygdala and the injection of bicuculline or NMDA into the ventral tegmental area alone could not affect memory consolidation. Taken together, it seems that there is a functional interaction between the basolateral amygdala endocannabinoid system and the ventral tegmental area GABAergic- or glutamatergic neurotransmission in the modulation of morphine-induced memory consolidation impairment.
journal_name
Neurosciencejournal_title
Neuroscienceauthors
Sharifi KA,Rezayof A,Torkaman-Boutorabi A,Zarrindast MRdoi
10.1016/j.neuroscience.2017.03.036subject
Has Abstractpub_date
2017-06-14 00:00:00pages
7-16eissn
0306-4522issn
1873-7544pii
S0306-4522(17)30202-6journal_volume
353pub_type
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