TY - JOUR ID - 18027 TI - The bidirectional effect of prelimbic 5-hydroxytryptamine type-4 (5-HT4) receptors on ACPA-mediated aversive memory impairment in adult male Sprague-Dawley rats JO - Iranian Journal of Basic Medical Sciences JA - IJBMS LA - en SN - 2008-3866 AU - Ahmadi-Mahmoodabadi, Nargol AU - Emamghoreishi, Masoumeh AU - Nasehi, Mohammad AU - Zarrindast, Mohammad-Reza AD - Institute for Cognitive Science Studies, Tehran, Iran AD - Department of Pharmacology, School of Medicine and Department of Neuroscience, School of Advanced Medical Sciences and Technologies, Shiraz University of Medical Sciences, Shiraz, Iran AD - Cognitive and Neuroscience Research Center, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran Y1 - 2021 PY - 2021 VL - 24 IS - 6 SP - 726 EP - 733 KW - ACPA KW - Pre-limbic cortex KW - Passive avoidance memory KW - RS23597-190 KW - RS67333 DO - 10.22038/ijbms.2021.49501.11317 N2 - Objective(s): This study aimed at investigating the effect of serotonergic 5-HT4 receptor agonist/antagonist on memory consolidation deficit induced by ACPA (a potent, selective CB1 cannabinoid receptor agonist) in the pre-limbic (PL) cortex. Materials and Methods: We used the step-through passive avoidance test to evaluate memory consolidation of male Sprague-Dawley (SD) rats. Bilateral post-training microinjections of the drugs were done in a volume of 0.6 μl/rat into the PL area (0.3 μl per side).Results: The results showed a significant interaction between RS67333 hydrochloride (5-HT4 receptor agonist) or RS23597-190 hydrochloride (5-HT4 receptor antagonist) and ACPA on consolidation of aversive memory. RS67333 hydrochloride (0.5 μg/rat) enhanced consolidation of memory and its co-administration at the ineffective dose of 0.005 μg/rat with ineffective (0.001 μg/rat) or effective (0.1 μg/rat) doses of ACPA improved and prevented impairment of memory caused by ACPA, respectively. In other words, RS67333 had a bidirectional effect on ACPA-caused amnesia. While RS23597-190 hydrochloride had no effect on memory at the doses used (0.005, 0.01, 0.1, or 0.5 μg/rat); but its concomitant use with an effective dose of ACPA (0.1 μg/rat) potentiated amnesia. None of the drugs had an effect on locomotor activity.Conclusion: This study revealed that activation or deactivation of the 5-HT4 receptors in the PL may mediate the IA memory impairment induced by ACPA indicating a modulatory role for the 5-HT4 serotonergic receptors. UR - https://ijbms.mums.ac.ir/article_18027.html L1 - https://ijbms.mums.ac.ir/article_18027_bcb712d262db07eac50ee759f447fc98.pdf ER -