PMID- 23054634 OWN - NLM STAT- MEDLINE DCOM- 20130326 LR - 20211021 IS - 1995-8218 (Electronic) IS - 1673-7067 (Print) IS - 1995-8218 (Linking) VI - 28 IP - 5 DP - 2012 Oct TI - Combined action of MK-801 and ceftriaxone impairs the acquisition and reinstatement of morphine-induced conditioned place preference, and delays morphine extinction in rats. PG - 567-76 LID - 10.1007/s12264-012-1269-8 [doi] AB - OBJECTIVE: It is well established that glutamate and its receptors, particularly the N-methyl-D-aspartate receptor (NMDAR), play a significant role in addiction and that the inhibition of glutamatergic hyperfunction reduces addictive behaviors in experimental animals. Specifically, NMDAR antagonists such as MK-801, and an inducer of the expression of glutamate transporter subtype-1 (GLT-1) (ceftriaxone) are known to inhibit addictive behavior. The purpose of this study was to determine whether the combined action of a low dose of MK-801 and a low dose of ceftriaxone provides better inhibition of the acquisition, extinction, and reinstatement of morphine-induced conditioned place preference (CPP) than either compound alone. METHODS: A morphine-paired CPP experiment was used to study the effects of low doses of MK-801, ceftriaxone and a combination of both on reward-related memory (acquisition, extinction, and reinstatement of morphine preference) in rats. RESULTS: A low dose of neither MK-801 (0.05 mg/kg, i.p.) nor ceftriaxone (25 mg/kg, i.p.) alone effectively impaired CPP behaviors. However, when applied in combination, they reduced the acquisition of morphine-induced CPP and completely prevented morphine reinstatement. Their combination also notably impaired the extinction of morphine-induced CPP. CONCLUSION: The combined action of a low dose of an NMDAR antagonist (MK-801) and GLT-1 activation by ceftriaxone effectively changed different phases of CPP behavior. FAU - Fan, Yaodong AU - Fan Y AD - Department of Neurosurgery, Third Affiliated Hospital of Kunming Medical University, Kunming, 650118, China. FAU - Niu, Haichen AU - Niu H FAU - Rizak, Joshua D AU - Rizak JD FAU - Li, Ling AU - Li L FAU - Wang, Guimei AU - Wang G FAU - Xu, Liqi AU - Xu L FAU - Ren, He AU - Ren H FAU - Lei, Hao AU - Lei H FAU - Yu, Hualin AU - Yu H LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20121003 PL - Singapore TA - Neurosci Bull JT - Neuroscience bulletin JID - 101256850 RN - 6LR8C1B66Q (Dizocilpine Maleate) RN - 75J73V1629 (Ceftriaxone) RN - 76I7G6D29C (Morphine) SB - IM MH - Animals MH - Ceftriaxone/*administration & dosage MH - Conditioning, Psychological/*drug effects/physiology MH - Dizocilpine Maleate/*administration & dosage MH - Drug Therapy, Combination MH - Extinction, Psychological/*drug effects/physiology MH - Memory/drug effects/physiology MH - Morphine/*antagonists & inhibitors/*pharmacology MH - Rats MH - Rats, Sprague-Dawley MH - Time Factors PMC - PMC5561921 EDAT- 2012/10/12 06:00 MHDA- 2013/03/27 06:00 PMCR- 2013/10/01 CRDT- 2012/10/12 06:00 PHST- 2012/03/02 00:00 [received] PHST- 2012/04/23 00:00 [accepted] PHST- 2012/10/12 06:00 [entrez] PHST- 2012/10/12 06:00 [pubmed] PHST- 2013/03/27 06:00 [medline] PHST- 2013/10/01 00:00 [pmc-release] AID - 1269 [pii] AID - 10.1007/s12264-012-1269-8 [doi] PST - ppublish SO - Neurosci Bull. 2012 Oct;28(5):567-76. doi: 10.1007/s12264-012-1269-8. Epub 2012 Oct 3.