PMID- 11953750 OWN - NLM STAT- MEDLINE DCOM- 20020513 LR - 20220309 IS - 1097-6256 (Print) IS - 1097-6256 (Linking) VI - 5 IP - 5 DP - 2002 May TI - Extrasynaptic NMDARs oppose synaptic NMDARs by triggering CREB shut-off and cell death pathways. PG - 405-14 AB - Here we report that synaptic and extrasynaptic NMDA (N-methyl-D-aspartate) receptors have opposite effects on CREB (cAMP response element binding protein) function, gene regulation and neuron survival. Calcium entry through synaptic NMDA receptors induced CREB activity and brain-derived neurotrophic factor (BDNF) gene expression as strongly as did stimulation of L-type calcium channels. In contrast, calcium entry through extrasynaptic NMDA receptors, triggered by bath glutamate exposure or hypoxic/ischemic conditions, activated a general and dominant CREB shut-off pathway that blocked induction of BDNF expression. Synaptic NMDA receptors have anti-apoptotic activity, whereas stimulation of extrasynaptic NMDA receptors caused loss of mitochondrial membrane potential (an early marker for glutamate-induced neuronal damage) and cell death. Specific blockade of extrasynaptic NMDA receptors may effectively prevent neuron loss following stroke and other neuropathological conditions associated with glutamate toxicity. FAU - Hardingham, G E AU - Hardingham GE AD - MRC Laboratory of Molecular Biology, Hills Road, Cambridge CB2 2QH, UK. FAU - Fukunaga, Y AU - Fukunaga Y FAU - Bading, H AU - Bading H LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Nat Neurosci JT - Nature neuroscience JID - 9809671 RN - 0 (Brain-Derived Neurotrophic Factor) RN - 0 (Calcium Channels, L-Type) RN - 0 (Cyclic AMP Response Element-Binding Protein) RN - 0 (Enzyme Inhibitors) RN - 0 (Excitatory Amino Acid Antagonists) RN - 0 (NR2B NMDA receptor) RN - 0 (Piperidines) RN - 0 (RNA, Messenger) RN - 0 (Receptors, N-Methyl-D-Aspartate) RN - 3KX376GY7L (Glutamic Acid) RN - R8OE3P6O5S (ifenprodil) RN - SY7Q814VUP (Calcium) SB - IM CIN - Nat Neurosci. 2002 May;5(5):389-90. PMID: 11976696 MH - Brain-Derived Neurotrophic Factor/genetics/metabolism MH - Calcium/metabolism MH - Calcium Channels, L-Type/metabolism MH - Calcium Signaling/drug effects MH - Cell Death/drug effects/physiology MH - Cell Hypoxia/physiology MH - Cell Survival/drug effects/physiology MH - Cells, Cultured MH - Cyclic AMP Response Element-Binding Protein/antagonists & inhibitors/*metabolism MH - Enzyme Inhibitors/pharmacology MH - Excitatory Amino Acid Antagonists/pharmacology MH - Gene Expression Regulation/drug effects/physiology MH - Glutamic Acid/pharmacology MH - Intracellular Membranes/physiology MH - Membrane Potentials/physiology MH - Mitochondria/physiology MH - Neurons/cytology/drug effects/*metabolism MH - Piperidines/pharmacology MH - RNA, Messenger/metabolism MH - Receptors, N-Methyl-D-Aspartate/antagonists & inhibitors/*metabolism MH - Signal Transduction/drug effects/*physiology MH - Synapses/*metabolism EDAT- 2002/04/16 10:00 MHDA- 2002/05/15 10:01 CRDT- 2002/04/16 10:00 PHST- 2001/11/26 00:00 [received] PHST- 2002/03/13 00:00 [accepted] PHST- 2002/04/16 10:00 [pubmed] PHST- 2002/05/15 10:01 [medline] PHST- 2002/04/16 10:00 [entrez] AID - nn835 [pii] AID - 10.1038/nn835 [doi] PST - ppublish SO - Nat Neurosci. 2002 May;5(5):405-14. doi: 10.1038/nn835.