PMID- 26362885 OWN - NLM STAT- MEDLINE DCOM- 20160719 LR - 20211203 IS - 1873-7544 (Electronic) IS - 0306-4522 (Linking) VI - 308 DP - 2015 Nov 12 TI - mTOR signaling controls VGLUT2 expression to maintain pain hypersensitivity after tissue injury. PG - 169-79 LID - S0306-4522(15)00823-4 [pii] LID - 10.1016/j.neuroscience.2015.09.013 [doi] AB - Mammalian target of rapamycin (mTOR) is a serine-threonine protein kinase that controls protein synthesis in the nervous system. Here, we characterized the role of protein synthesis regulation due to mTOR signaling in rat dorsal root ganglion (DRG) following plantar incision. The number of phosphorylated mTOR (p-mTOR)-positive neurons was increased 2-4days after the incision. Rapamycin inhibited p-mTOR expression in the DRG and thermal hypersensitivity 3days but not 1day after the incision. Vesicular glutamate transporter 2 (VGLUT2) expression was increased after the plantar incision, which was inhibited by rapamycin. These results demonstrated that tissue injury induces phosphorylation of mTOR and increased protein level of VGLUT2 in the DRG neurons. mTOR phosphorylation involves in maintenance of injury-induced thermal hypersensitivity. CI - Copyright (c) 2015 IBRO. Published by Elsevier Ltd. All rights reserved. FAU - Izumi, Y AU - Izumi Y AD - Department of Anesthesiology, Kyoto Prefectural University of Medicine, Japan. FAU - Sasaki, M AU - Sasaki M AD - Department of Anesthesiology, Kyoto Prefectural University of Medicine, Japan. FAU - Hashimoto, S AU - Hashimoto S AD - Department of Anesthesiology, Kyoto Prefectural University of Medicine, Japan. FAU - Sawa, T AU - Sawa T AD - Department of Anesthesiology, Kyoto Prefectural University of Medicine, Japan. FAU - Amaya, F AU - Amaya F AD - Department of Anesthesiology, Kyoto Prefectural University of Medicine, Japan. Electronic address: ama@koto.kpu-m.ac.jp. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20150908 PL - United States TA - Neuroscience JT - Neuroscience JID - 7605074 RN - 0 (Analgesics) RN - 0 (Slc17a6 protein, rat) RN - 0 (TRPV Cation Channels) RN - 0 (Trpv1 protein, rat) RN - 0 (Vesicular Glutamate Transport Protein 2) RN - EC 2.7.1.1 (mTOR protein, rat) RN - EC 2.7.11.1 (TOR Serine-Threonine Kinases) RN - W36ZG6FT64 (Sirolimus) SB - IM MH - Analgesics/pharmacology MH - Animals MH - Disease Models, Animal MH - Foot Injuries MH - Ganglia, Spinal/drug effects/*metabolism/pathology MH - Hindlimb/injuries MH - Hot Temperature MH - Hyperalgesia/drug therapy/etiology/*metabolism/pathology MH - Male MH - Neurons/drug effects/*metabolism/pathology MH - Pain/drug therapy/*metabolism/pathology MH - Pain Threshold/drug effects/physiology MH - Phosphorylation MH - Posterior Horn Cells/drug effects/metabolism/pathology MH - Rats, Sprague-Dawley MH - Signal Transduction/drug effects MH - Sirolimus/pharmacology MH - TOR Serine-Threonine Kinases/antagonists & inhibitors/*metabolism MH - TRPV Cation Channels/metabolism MH - Vesicular Glutamate Transport Protein 2/*metabolism OTO - NOTNLM OT - VGLUT2 OT - hyperalgesia OT - incision OT - mTOR EDAT- 2015/09/13 06:00 MHDA- 2016/07/20 06:00 CRDT- 2015/09/13 06:00 PHST- 2015/05/20 00:00 [received] PHST- 2015/08/16 00:00 [revised] PHST- 2015/09/03 00:00 [accepted] PHST- 2015/09/13 06:00 [entrez] PHST- 2015/09/13 06:00 [pubmed] PHST- 2016/07/20 06:00 [medline] AID - S0306-4522(15)00823-4 [pii] AID - 10.1016/j.neuroscience.2015.09.013 [doi] PST - ppublish SO - Neuroscience. 2015 Nov 12;308:169-79. doi: 10.1016/j.neuroscience.2015.09.013. Epub 2015 Sep 8.