PMID- 17320080 OWN - NLM STAT- MEDLINE DCOM- 20070626 LR - 20181113 IS - 0014-4886 (Print) IS - 0014-4886 (Linking) VI - 204 IP - 2 DP - 2007 Apr TI - Neurotrophin ligand-receptor systems in somatosensory cortex of adult rat are affected by repeated episodes of ethanol. PG - 680-92 AB - Ethanol exposure profoundly affects learning and memory and neural plasticity. Key players underlying these functions are neurotrophins. The present study explored the effects of ethanol on the distribution of neurotrophins in the cerebral cortex of the adult rat. Age- and weight-matched pairs of adult male, Long-Evans rats were fed a liquid, ethanol-containing (6.7% v/v) diet or pair-fed an isocaloric control diet three consecutive days per week for 6, 12, 18, or 24 weeks. Brains were processed immunohistochemically for nerve growth factor (NGF) and brain-derived neurotrophic factor (BDNF) expression and for the expression of three neurotrophin receptors, p75, trkA, and trkB. Total numbers of immunolabeled neurons in specific layers of somatosensory cortex of ethanol- and control-fed animals were determined stereologically. Ethanol exposure induced an increase in the numbers of NGF- or BDNF-expressing neurons and in neurotrophin content per somata. These changes were (a) time and (b) laminar dependent. In contrast, the number of receptor-expressing neurons did not change due to ethanol exposure or to length of time on the ethanol diet. Thus, ethanol induces the recruitment of cortical neurons to express neurotrophins and an increase in the amount of neurotrophin expression per neuron. FAU - Bruns, Marla B AU - Bruns MB AD - Department of Neuroscience and Physiology, State University of New York-Upstate Medical University, 750 East Adams Street, Syracuse, NY 13210, USA. FAU - Miller, Michael W AU - Miller MW LA - eng GR - F30 AA015245/AA/NIAAA NIH HHS/United States GR - R01 AA007568/AA/NIAAA NIH HHS/United States GR - AA 06916/AA/NIAAA NIH HHS/United States GR - R01 AA006916/AA/NIAAA NIH HHS/United States GR - R37 AA007568/AA/NIAAA NIH HHS/United States GR - AA 15245/AA/NIAAA NIH HHS/United States GR - AA 07568/AA/NIAAA NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, U.S. Gov't, Non-P.H.S. DEP - 20070108 PL - United States TA - Exp Neurol JT - Experimental neurology JID - 0370712 RN - 0 (Central Nervous System Depressants) RN - 0 (Nerve Growth Factors) RN - 0 (Receptors, Nerve Growth Factor) RN - 3K9958V90M (Ethanol) RN - EC 4.2.1.11 (Phosphopyruvate Hydratase) SB - IM MH - Animals MH - Central Nervous System Depressants/*pharmacology MH - Ethanol/*pharmacology MH - Male MH - Nerve Growth Factors/*metabolism MH - Phosphopyruvate Hydratase/metabolism MH - Rats MH - Rats, Long-Evans MH - Receptors, Nerve Growth Factor/*metabolism MH - Somatosensory Cortex/*drug effects MH - Time Factors PMC - PMC1995597 MID - NIHMS21542 EDAT- 2007/02/27 09:00 MHDA- 2007/06/27 09:00 PMCR- 2008/04/01 CRDT- 2007/02/27 09:00 PHST- 2006/10/30 00:00 [received] PHST- 2006/12/19 00:00 [revised] PHST- 2006/12/28 00:00 [accepted] PHST- 2007/02/27 09:00 [pubmed] PHST- 2007/06/27 09:00 [medline] PHST- 2007/02/27 09:00 [entrez] PHST- 2008/04/01 00:00 [pmc-release] AID - S0014-4886(07)00002-7 [pii] AID - 10.1016/j.expneurol.2006.12.022 [doi] PST - ppublish SO - Exp Neurol. 2007 Apr;204(2):680-92. doi: 10.1016/j.expneurol.2006.12.022. Epub 2007 Jan 8.