PMID- 17044032 OWN - NLM STAT- MEDLINE DCOM- 20070313 LR - 20091119 IS - 0360-4012 (Print) IS - 0360-4012 (Linking) VI - 84 IP - 8 DP - 2006 Dec TI - Mitogen-activated protein kinase pathway mediates effects of brain-derived neurotrophic factor on differentiation of basal forebrain oligodendrocytes. PG - 1692-702 AB - Previous studies indicate that brain-derived neurotrophic factor (BDNF), through the mediation of the trkB receptor, modulates the expression of differentiated traits in basal forebrain (BF) oligodendrocytes (OLGs). Specifically, BDNF up-regulates the expression of myelin basic protein (MBP), proteolipid protein (PLP), and myelin associated glycoprotein (MAG; Du et al. [2006] Mol. Cell. Neurosci. 31:366-375). However, the signaling cascades mediating the effects of BDNF have not been defined. The current study employs biochemical and molecular biological approaches to examine the involvements of the mitogen-activated protein kinase (MAPK) pathway, the phosphatidylinositol-3 kinase (PI3K) pathway, and the phospholipase C-gamma (PLC-gamma) pathway. Our results indicate that, in BF OLGs, BDNF activates the MAPK pathway and the PLC-gamma pathway but not the PI3K-Akt signaling cascade. By using specific inhibitors and mutated dominant negative or constitutively active forms of MAPK kinase, we demonstrate that the MAPK pathway is mediating the effects of BDNF on expression of differentiated traits in BF OLGs. FAU - Du, Yangzhou AU - Du Y AD - Department of Neuroscience and Cell Biology, UMDNJ/Robert Wood Johnson Medical School, Piscataway, NJ 08854, USA. FAU - Lercher, Lauren D AU - Lercher LD FAU - Zhou, Renping AU - Zhou R FAU - Dreyfus, Cheryl F AU - Dreyfus CF LA - eng GR - 36647/PHS HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't PL - United States TA - J Neurosci Res JT - Journal of neuroscience research JID - 7600111 RN - 0 (Brain-Derived Neurotrophic Factor) RN - 0 (Enzyme Inhibitors) RN - 0 (Estrenes) RN - 0 (Pyrrolidinones) RN - 112648-68-7 (1-(6-((3-methoxyestra-1,3,5(10)-trien-17-yl)amino)hexyl)-1H-pyrrole-2,5-dione) RN - EC 2.7.12.2 (Mitogen-Activated Protein Kinase Kinases) SB - IM MH - Adenoviridae/physiology MH - Analysis of Variance MH - Animals MH - Animals, Newborn MH - Blotting, Western/methods MH - Brain-Derived Neurotrophic Factor/*pharmacology MH - Cell Differentiation/*drug effects MH - Cells, Cultured MH - Enzyme Inhibitors/pharmacology MH - Estrenes/pharmacology MH - Female MH - Immunohistochemistry/methods MH - Mitogen-Activated Protein Kinase Kinases/*metabolism MH - Oligodendroglia/*drug effects MH - Pregnancy MH - Prosencephalon/*cytology MH - Pyrrolidinones/pharmacology MH - Rats MH - Rats, Sprague-Dawley MH - Signal Transduction/*physiology MH - Time Factors MH - Transcription, Genetic EDAT- 2006/10/18 09:00 MHDA- 2007/03/14 09:00 CRDT- 2006/10/18 09:00 PHST- 2006/10/18 09:00 [pubmed] PHST- 2007/03/14 09:00 [medline] PHST- 2006/10/18 09:00 [entrez] AID - 10.1002/jnr.21080 [doi] PST - ppublish SO - J Neurosci Res. 2006 Dec;84(8):1692-702. doi: 10.1002/jnr.21080.