PMID- 26808640 OWN - NLM STAT- MEDLINE DCOM- 20160804 LR - 20220317 IS - 1872-7972 (Electronic) IS - 0304-3940 (Linking) VI - 616 DP - 2016 Mar 11 TI - The effects of an intraperitoneal single low dose of ketamine in attenuating the postoperative skin/muscle incision and retraction-induced pain related to the inhibition of N-methyl-D-aspartate receptors in the spinal cord. PG - 211-7 LID - S0304-3940(15)30328-1 [pii] LID - 10.1016/j.neulet.2015.12.045 [doi] AB - BACKGROUND: Chronic postoperative pain (CPOP) is a common clinical problem which might be related to central sensitization. It has been widely accepted that NMDA (N-methyl-D-aspartate) receptors are among the triggers of central sensitization. Ketamine is a non-competitive NMDA receptor antagonist that is widely used in alleviating postoperative pain, but its effect on CPOP has been rarely reported. In the present study, the skin/muscle incision and retraction (SMIR) model was used to investigate the role of NMDARs in chronic postoperative pain and the effect of an intraperitoneal single low dose ketamine (10mg/kg) of attenuating SMIR-induced CPOP. METHODS: We assessed pain behaviours after a SMIR operation by paw withdrawal threshold (PWMT) and paw withdrawal latency (PWMTL). Western blotting were performed to examine the role of NMDARs in SMIR-induced CPOP and the effect of ketamine on the expression and phosphorylation of NMDARs. RESULTS: The SMIR operation induced long-lasting mechanical hyperalgesia, and the up-regulation of phosphorylated NMDARs and total NMDARs at the spinal level. A single intraperitoneal administration of low dose ketamine (10mg/kg) during surgery alleviated pain behaviors and inhibited the up-regulation of phosphorylated NMDARs and total NMDARs. CONCLUSIONS: Our datas suggested that NMDARs play important roles in SMIR-induced CPOP. A single intraperitoneal low dose of ketamine could attenuate SMIR-induced CPOP, which might be associated with the inhibition of NMDARs. Our finding might provide a new, simple method of addressing CPOP. CI - Copyright (c) 2016 Elsevier Ireland Ltd. All rights reserved. FAU - Shen, Yu AU - Shen Y AD - Department of Anesthesiology, Affiliated Drum Tower Hospital of Medical Department of Nanjing University, Nanjing, Jiangsu, China. Electronic address: feather0417@sina.com. FAU - Xu, Li AU - Xu L AD - Department of Anesthesiology, Affiliated Drum Tower Hospital of Medical Department of Nanjing University, Nanjing, Jiangsu, China. Electronic address: 275585794@qq.com. FAU - Liu, Ming AU - Liu M AD - Department of Anesthesiology, Affiliated Drum Tower Hospital of Medical Department of Nanjing University, Nanjing, Jiangsu, China. Electronic address: liuming0225@126.com. FAU - Lei, Yishan AU - Lei Y AD - Department of Anesthesiology, Affiliated Drum Tower Hospital of Medical Department of Nanjing University, Nanjing, Jiangsu, China. Electronic address: mikunichan@sina.com. FAU - Gu, Xiaoping AU - Gu X AD - Department of Anesthesiology, Affiliated Drum Tower Hospital of Medical Department of Nanjing University, Nanjing, Jiangsu, China. Electronic address: 13813996903@126.com. FAU - Ma, Zhengliang AU - Ma Z AD - Department of Anesthesiology, Affiliated Drum Tower Hospital of Medical Department of Nanjing University, Nanjing, Jiangsu, China. Electronic address: mazhengliang1964@nju.edu.cn. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20160122 PL - Ireland TA - Neurosci Lett JT - Neuroscience letters JID - 7600130 RN - 0 (Analgesics) RN - 0 (Receptors, N-Methyl-D-Aspartate) RN - 690G0D6V8H (Ketamine) SB - IM MH - Analgesics/*administration & dosage MH - Animals MH - Injections, Intraperitoneal MH - Ketamine/*administration & dosage MH - Male MH - Muscle, Skeletal/surgery MH - Pain, Postoperative/*drug therapy MH - Rats, Sprague-Dawley MH - Receptors, N-Methyl-D-Aspartate/*antagonists & inhibitors/metabolism MH - Spinal Cord/*drug effects/metabolism OTO - NOTNLM OT - Central sensitization OT - Chronic postoperative pain OT - N-methyl-d-aspartate OT - Skin/muscle incision and retraction EDAT- 2016/01/26 06:00 MHDA- 2016/08/05 06:00 CRDT- 2016/01/26 06:00 PHST- 2015/07/19 00:00 [received] PHST- 2015/11/18 00:00 [revised] PHST- 2015/12/17 00:00 [accepted] PHST- 2016/01/26 06:00 [entrez] PHST- 2016/01/26 06:00 [pubmed] PHST- 2016/08/05 06:00 [medline] AID - S0304-3940(15)30328-1 [pii] AID - 10.1016/j.neulet.2015.12.045 [doi] PST - ppublish SO - Neurosci Lett. 2016 Mar 11;616:211-7. doi: 10.1016/j.neulet.2015.12.045. Epub 2016 Jan 22.