PMID- 38430788 OWN - NLM STAT- MEDLINE DCOM- 20240422 LR - 20240422 IS - 1879-0046 (Electronic) IS - 0376-8716 (Linking) VI - 257 DP - 2024 Apr 1 TI - 3,4-Methylenedioxymethamphetamine (MDMA) impairs cognitive function during withdrawal via activation of the arachidonic acid cascade in the hippocampus. PG - 111139 LID - S0376-8716(24)00060-7 [pii] LID - 10.1016/j.drugalcdep.2024.111139 [doi] AB - BACKGROUND: The recreational drug +/-3,4-methylenedioxymethamphetamine (MDMA; also known as "ecstasy") has unusual subjective prosocial and empathogenic effects, and has exhibited potential as an adjunct to psychotherapy in recent years. However, there has been some concern regarding possible neuropsychiatric symptoms, such as cognitive impairment and dependence, emerging after abstinence. Therefore, this study aimed to evaluate the mechanism underlying cognitive impairment during MDMA withdrawal. To achieve this, we focused on the arachidonic acid cascade, which is related to addiction to some abusive drugs. METHODS: A novel object recognition task was used to investigate cognitive function in mice. Furthermore, we quantified prostaglandin E(2) during MDMA withdrawal. RESULTS: The recognition index significantly decreased during withdrawal after repeated administration of MDMA (10mg/kg, i.p., once daily for 7 days), but not following co-administration of diclofenac (10mg/kg, i.p.), a cyclooxygenase inhibitor. On day 1, following repeated MDMA treatment, prostaglandin E(2) content significantly increased in the hippocampus but not in the prefrontal cortex and striatum. CONCLUSIONS: Our findings indicate that activation of the arachidonic acid cascade at least in the hippocampus is likely involved in the development of recognition memory impairment during MDMA withdrawal. Therefore, co-use of cyclooxygenase inhibitors with MDMA may reduce concerns regarding MDMA-induced impairment of recognition memory. CI - Copyright (c) 2024. Published by Elsevier B.V. FAU - Nawata, Yoko AU - Nawata Y AD - Department of Pharmacology, Faculty of Pharmaceutical Science, Nagasaki International University, 2825-7 Huis Ten Bosch, Sasebo, Nagasaki 859-3298, Japan. FAU - Nishioku, Tsuyoshi AU - Nishioku T AD - Department of Pharmacology, Faculty of Pharmaceutical Science, Nagasaki International University, 2825-7 Huis Ten Bosch, Sasebo, Nagasaki 859-3298, Japan. FAU - Yamamoto, Tsuneyuki AU - Yamamoto T AD - Department of Pharmacotherapeutics and Neuropsychopharmacology, Faculty of Pharmaceutical Science, Nagasaki International University, 2825-7 Huis Ten Bosch, Sasebo, Nagasaki 859-3298, Japan. FAU - Yamaguchi, Taku AU - Yamaguchi T AD - Department of Pharmacotherapeutics and Neuropsychopharmacology, Faculty of Pharmaceutical Science, Nagasaki International University, 2825-7 Huis Ten Bosch, Sasebo, Nagasaki 859-3298, Japan. Electronic address: ytaku@niu.ac.jp. LA - eng PT - Journal Article DEP - 20240224 PL - Ireland TA - Drug Alcohol Depend JT - Drug and alcohol dependence JID - 7513587 RN - KE1SEN21RM (N-Methyl-3,4-methylenedioxyamphetamine) RN - 27YG812J1I (Arachidonic Acid) RN - 0 (Prostaglandins) SB - IM MH - Mice MH - Animals MH - *N-Methyl-3,4-methylenedioxyamphetamine/adverse effects MH - Arachidonic Acid/pharmacology MH - Cognition MH - Hippocampus MH - Prostaglandins/pharmacology OTO - NOTNLM OT - Cognitive impairment OT - Cyclooxygenase OT - MDMA OT - Novel object recognition task OT - Prostaglandin E(2) COIS- Declaration of Competing Interest On behalf of all authors, the corresponding author states that there are no conflicts of interest. EDAT- 2024/03/03 17:42 MHDA- 2024/04/22 06:42 CRDT- 2024/03/02 18:12 PHST- 2023/08/18 00:00 [received] PHST- 2024/02/14 00:00 [revised] PHST- 2024/02/19 00:00 [accepted] PHST- 2024/04/22 06:42 [medline] PHST- 2024/03/03 17:42 [pubmed] PHST- 2024/03/02 18:12 [entrez] AID - S0376-8716(24)00060-7 [pii] AID - 10.1016/j.drugalcdep.2024.111139 [doi] PST - ppublish SO - Drug Alcohol Depend. 2024 Apr 1;257:111139. doi: 10.1016/j.drugalcdep.2024.111139. Epub 2024 Feb 24.