PMID- 22858595 OWN - NLM STAT- MEDLINE DCOM- 20130501 LR - 20141120 IS - 1873-7544 (Electronic) IS - 0306-4522 (Linking) VI - 223 DP - 2012 Oct 25 TI - Tumor suppressor menin mediates peripheral nerve injury-induced neuropathic pain through potentiating synaptic plasticity. PG - 473-85 LID - S0306-4522(12)00761-0 [pii] LID - 10.1016/j.neuroscience.2012.07.036 [doi] AB - Synaptic plasticity is a crucial step in the development of central sensitization in the pathogenesis of neuropathic hyperalgesia. Menin, the product of the multiple endocrine neoplasia type 1 (MEN1) gene, possesses the property of synaptogenesis which plays an essential role in neuronal activity. We tested the contributing role of spinal menin in peripheral nerve injury-induced neuropathic hypersensitivity through modulating neuronal synaptic plasticity. After approval by the Institutional Animal Care and Use Committee, nociceptive responses were detected with von Frey filaments and thermal plate after spared nerve injury in C57BL/6 mice who were treated with either intrathecal antisense oligonucleotide of MEN1 (ASO) or vehicle. Extracellular spontaneous discharge frequency, field excitatory postsynaptic potential (fEPSP), and monosynaptic excitatory postsynaptic currents (EPSCs) were measured electrophysiologically. Intrathecal ASO alleviated nerve injury-induced mechanical and thermal hypersensitivity. Upregulated spinal menin after nerve injury colocalized with NeuN in the superficial laminae; genetic knockdown of spinal menin reduced nerve injury induced in vivo spontaneous activity and instantaneous frequency and in vitro field potentials; ASO decreased the frequency and amplitude of monosynaptic EPSCs, and reduced synaptic strength and total charge. Collectively, these findings highlight the role of upregulated neuronal menin in the spinal cord in potentiating spinal synaptic plasticity in peripheral nerve injury-induced neuropathic hypersensitivity. CI - Copyright (c) 2012 IBRO. Published by Elsevier Ltd. All rights reserved. FAU - Xu, S AU - Xu S AD - State Key Laboratory of Reproductive Medicine, Department of Anesthesiology and Critical Care Medicine, Nanjing Maternity and Child Health Care Hospital, Nanjing Medical University, Nanjing 210004, China. FAU - Wu, H AU - Wu H FAU - Wang, X AU - Wang X FAU - Shen, X AU - Shen X FAU - Guo, X AU - Guo X FAU - Shen, R AU - Shen R FAU - Wang, F AU - Wang F LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20120731 PL - United States TA - Neuroscience JT - Neuroscience JID - 7605074 RN - 0 (Men1 protein, mouse) RN - 0 (Oligonucleotides, Antisense) RN - 0 (Proto-Oncogene Proteins) RN - 0 (RNA, Messenger) RN - EC 4.2.1.11 (Phosphopyruvate Hydratase) SB - IM MH - Action Potentials/drug effects/genetics MH - Analysis of Variance MH - Animals MH - Area Under Curve MH - Disease Models, Animal MH - Drug Delivery Systems MH - Electric Stimulation MH - Embryo, Mammalian MH - Excitatory Postsynaptic Potentials/drug effects/physiology MH - Gene Expression Regulation/drug effects/*physiology MH - Hyperalgesia/drug therapy/etiology MH - In Vitro Techniques MH - Male MH - Mice MH - Mice, Inbred C57BL MH - Neuralgia/drug therapy/*etiology/*metabolism MH - Neurons/physiology MH - Oligonucleotides, Antisense/therapeutic use MH - Pain Measurement MH - Pain Threshold/drug effects MH - Peripheral Nerve Injuries/*complications MH - Phosphopyruvate Hydratase/metabolism MH - Proto-Oncogene Proteins/genetics/*metabolism MH - RNA, Messenger/metabolism MH - Spinal Cord/cytology/drug effects/metabolism EDAT- 2012/08/04 06:00 MHDA- 2013/05/02 06:00 CRDT- 2012/08/04 06:00 PHST- 2012/05/17 00:00 [received] PHST- 2012/07/21 00:00 [revised] PHST- 2012/07/24 00:00 [accepted] PHST- 2012/08/04 06:00 [entrez] PHST- 2012/08/04 06:00 [pubmed] PHST- 2013/05/02 06:00 [medline] AID - S0306-4522(12)00761-0 [pii] AID - 10.1016/j.neuroscience.2012.07.036 [doi] PST - ppublish SO - Neuroscience. 2012 Oct 25;223:473-85. doi: 10.1016/j.neuroscience.2012.07.036. Epub 2012 Jul 31.