PMID- 15893583 OWN - NLM STAT- MEDLINE DCOM- 20050802 LR - 20131121 IS - 0169-328X (Print) IS - 0169-328X (Linking) VI - 136 IP - 1-2 DP - 2005 May 20 TI - Contralateral cytokine gene induction after peripheral nerve lesions: dependence on the mode of injury and NMDA receptor signaling. PG - 23-8 AB - There is increasing evidence that unilateral nerve injury evokes contralateral responses, but the underlying mechanisms are largely unknown. In the present investigation, we analyzed cytokine and chemokine gene induction in contralateral, non-lesioned nerves after sciatic nerve crush and chronic constriction injury (CCI) by quantitative reverse transcriptase polymerase chain reaction in mice. After sciatic nerve crush, contralateral changes in cytokine gene expression were restricted to interleukin (IL)-1beta, which showed a monophasic peak at the first postoperative day. Following CCI, contralateral transcripts for IL-1beta, IL-10 and monocyte chemoattractant protein-1 (MCP-1) were significantly increased already at day 1 and upregulation persisted over the next 4 weeks. In contrast, tumor necrosis factor alpha (TNF-alpha) levels remained unchanged. Contralateral gene induction was restricted to the homonymous opposite sciatic nerve, but spared the femoral nerve. NMDA receptor blockade completely abolished contralateral cytokine expression after CCI on the mRNA level. In contralateral dorsal root ganglia, only IL-10 mRNA levels were modified after nerve injury. Sham operation significantly increased the cytokine and chemokine gene expression at the ipsilateral side, but could not mediate contralateral effects. Our study confirms that nerve injury evokes contralateral responses and identifies NMDA-mediated signaling as one underlying mechanism. FAU - Kleinschnitz, C AU - Kleinschnitz C AD - Department of Neurology, Julius-Maximilians Universitat, Josef-Schneider-Str. 11, D-97080 Wurzburg, Germany. FAU - Brinkhoff, J AU - Brinkhoff J FAU - Sommer, C AU - Sommer C FAU - Stoll, G AU - Stoll G LA - eng PT - Comparative Study PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Netherlands TA - Brain Res Mol Brain Res JT - Brain research. Molecular brain research JID - 8908640 RN - 0 (Chemokines) RN - 0 (Cytokines) RN - 0 (RNA, Messenger) RN - 0 (Receptors, N-Methyl-D-Aspartate) RN - 6LR8C1B66Q (Dizocilpine Maleate) SB - IM MH - Analysis of Variance MH - Animals MH - Chemokines/genetics/metabolism MH - Cytokines/genetics/*metabolism MH - Disease Models, Animal MH - Dizocilpine Maleate MH - Female MH - Functional Laterality/*physiology MH - Gene Expression/physiology MH - Mice MH - Mice, Inbred C57BL MH - Nerve Crush/methods MH - Peripheral Nervous System Diseases/*metabolism MH - RNA, Messenger/biosynthesis MH - Receptors, N-Methyl-D-Aspartate/*physiology MH - Reverse Transcriptase Polymerase Chain Reaction/methods MH - Sciatic Neuropathy/metabolism MH - Time Factors EDAT- 2005/05/17 09:00 MHDA- 2005/08/03 09:00 CRDT- 2005/05/17 09:00 PHST- 2004/09/27 00:00 [received] PHST- 2004/12/21 00:00 [revised] PHST- 2004/12/22 00:00 [accepted] PHST- 2005/05/17 09:00 [pubmed] PHST- 2005/08/03 09:00 [medline] PHST- 2005/05/17 09:00 [entrez] AID - S0169-328X(05)00002-1 [pii] AID - 10.1016/j.molbrainres.2004.12.015 [doi] PST - ppublish SO - Brain Res Mol Brain Res. 2005 May 20;136(1-2):23-8. doi: 10.1016/j.molbrainres.2004.12.015.