PMID- 28609560 OWN - NLM STAT- MEDLINE DCOM- 20180608 LR - 20181029 IS - 1097-4547 (Electronic) IS - 0360-4012 (Linking) VI - 95 IP - 12 DP - 2017 Dec TI - Resolving the contributions of anaesthesia, surgery, and nerve injury on brain derived neurotrophic factor expression in the medial prefrontal cortex of male rats in the CCI model of neuropathic pain. PG - 2376-2390 LID - 10.1002/jnr.24095 [doi] AB - The medial prefrontal cortex (mPFC) is critical for selecting and shaping complex behavioral responses. In rodent models of neuropathic pain there is evidence for both structural and functional changes in the mPFC. Brain derived neurotrophic factor (BDNF) plays a critical role in the normal functioning of the mPFC. It has been suggested that the disruption of complex behaviors and mood seen in some neuropathic pain patients is mediated in part by alterations of BDNF in this cortical region. In Sprague-Dawley rats, mPFC levels of BDNF and TrkB mRNA and protein, were quantified and compared to controls (n = 24) 6 days after either: (a) halothane (1.5%) anaesthesia (n = 12), (b) sham surgery under halothane (n = 12), (c) sciatic nerve chronic constriction injury under halothane (n = 48). The social behaviors of the rats were quantified daily during the experimental period. Halothane anaesthesia increased BDNF and TrkB mRNA bilaterally. These increases were reversed in rats that underwent sham surgical and nerve injury procedures. Further, halothane anaesthesia, surgical procedures, and nerve injury each decreased BDNF protein levels. These results reveal a marked and distinct BDNF expression profile in the mPFC of rats that have undergone each stage of the procedure to produce neuropathic pain by chronic constriction injury of the sciatic nerve. The highly sensitive nature of neurotrophic signalling to general anaesthesia in the mature neuronal circuit of the adult rat brain highlights the importance of careful evaluation and interpretation of data evaluating the effects of experimental procedures on neural substrates. CI - (c) 2017 Wiley Periodicals, Inc. FAU - Kang, James W M AU - Kang JWM AUID- ORCID: 0000-0002-8517-5656 AD - Discipline of Anatomy & Histology, School of Medical Sciences, The University of Sydney, New South Wales, 2006, Australia. AD - Discipline of Biomedical Sciences, School of Medical Sciences, The University of Sydney, New South Wales, 2006, Australia. FAU - Keay, Kevin A AU - Keay KA AD - Discipline of Anatomy & Histology, School of Medical Sciences, The University of Sydney, New South Wales, 2006, Australia. FAU - Mor, David AU - Mor D AD - Discipline of Biomedical Sciences, School of Medical Sciences, The University of Sydney, New South Wales, 2006, Australia. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20170613 PL - United States TA - J Neurosci Res JT - Journal of neuroscience research JID - 7600111 RN - 0 (Anesthetics, Inhalation) RN - 0 (Brain-Derived Neurotrophic Factor) RN - UQT9G45D1P (Halothane) SB - IM MH - Anesthetics, Inhalation/*pharmacology MH - Animals MH - Brain-Derived Neurotrophic Factor/*biosynthesis MH - Disease Models, Animal MH - Halothane/pharmacology MH - Male MH - Neuralgia/etiology/*metabolism MH - Prefrontal Cortex/*drug effects/*metabolism MH - Rats MH - Rats, Sprague-Dawley MH - Sciatic Nerve/injuries OTO - NOTNLM OT - BDNF OT - anaesthesia OT - nerve injury OT - neuropathic pain OT - prefrontal cortex EDAT- 2017/06/14 06:00 MHDA- 2018/06/09 06:00 CRDT- 2017/06/14 06:00 PHST- 2017/03/22 00:00 [received] PHST- 2017/05/05 00:00 [revised] PHST- 2017/05/10 00:00 [accepted] PHST- 2017/06/14 06:00 [pubmed] PHST- 2018/06/09 06:00 [medline] PHST- 2017/06/14 06:00 [entrez] AID - 10.1002/jnr.24095 [doi] PST - ppublish SO - J Neurosci Res. 2017 Dec;95(12):2376-2390. doi: 10.1002/jnr.24095. Epub 2017 Jun 13.