Abstract:
:Neuropsychiatric disorders, such as addiction, are associated with cognitive impairment, including learning and memory deficits. Previous research has demonstrated that the chronic use of methamphetamine (METH) induces long-term cognitive impairment and cannabidiol (CBD), as a neuroprotectant, can reverse spatial memory deficits induced by drug abuse. The study aimed to evaluate the effect of CBD on METH-induced memory impairment in rats chronically exposed to METH (CEM). For the induction of CEM, animals received METH (2 mg/kg, twice/day) for 10 days. Thereafter, the effect of intracerebroventricular (ICV) administration of CBD (32 and 160 nmol) during the (10 days) abstinence period on spatial memory was evaluated using the Y-Maze test, while recognition memory was examined using the novel object recognition (NOR) test. The results revealed a significant increase in the motor activity of METH-treated animals compared with the control group and, after the 10-day abstinence period, motor activity returned to baseline. Notably, the chronic administration of METH had impairing effects on spontaneous alternation performance and recognition memory, which was clearly observed in the NOR test. Additionally, although the ICV administration of CBD (160 nmol) could reverse long-term memory, a lower dose (32 nmol) did not result in any significant increase in exploring the novel object during short-term memory testing. These novel findings suggest that the chronic administration of METH induces memory impairment and presents interesting implications for the potential use of CBD in treating impairment deficits after chronic exposure to psychostimulant drugs such as METH.
journal_name
Behav Pharmacoljournal_title
Behavioural pharmacologyauthors
Razavi Y,Shabani R,Mehdizadeh M,Haghparast Adoi
10.1097/FBP.0000000000000544subject
Has Abstractpub_date
2020-06-01 00:00:00pages
385-396issue
4eissn
0955-8810issn
1473-5849journal_volume
31pub_type
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