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  NMDA receptor subunit NR2A is required for rapidly acquired spatial working memory but not incremental spatial reference memory

Bannerman, D. M., Niewoehner, B., Lyon, L., Romberg, C., Schmitt, W. B., Taylor, A., et al. (2008). NMDA receptor subunit NR2A is required for rapidly acquired spatial working memory but not incremental spatial reference memory. European Journal of Neuroscience: European Neuroscience Association, 28(14), 3623-3630. doi:10.1523/JNEUROSCI.3639-07.2008.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002B-BF02-4 Version Permalink: http://hdl.handle.net/21.11116/0000-0000-DBA9-B
Genre: Journal Article

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JNeurosci_28_2008_3623.pdf (Any fulltext), 207KB
 
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Bannerman, David M., Author
Niewoehner, Burkhard, Author
Lyon, Louisa, Author
Romberg, Carola, Author
Schmitt, Wolfram B., Author
Taylor, Amy, Author
Sanderson, David J., Author
Cottam, James, Author
Sprengel, Rolf1, Author              
Seeburg, Peter H.1, Author              
Köhr, Georg1, Author              
Rawlins, John Nicholas P., Author
Affiliations:
1Department of Molecular Neurobiology, Max Planck Institute for Medical Research, Max Planck Society, ou_1497704              

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Free keywords: hippocampus; long-term potentiation; synaptic plasticity; water maze; radial maze; T-maze
 Abstract: NMDA receptors (NMDARs) containing NR2A (epsilon1) subunits are key contributors to hippocampal long-term potentiation (LTP) induction in adult animals and have therefore been widely implicated in hippocampus-dependent spatial learning. Here we show that mice lacking the NR2A subunit or its C-terminal intracellular domain exhibit impaired spatial working memory (SWM) but normal spatial reference memory (SRM). Both NR2A mutants acquired the SRM version of the water maze task, and the SRM component of the radial maze, as well as controls. They were, however, impaired on a non-matching-to-place T-maze task, and on the SWM component of the radial maze. In addition, NR2A knock-out mice displayed a diminished spatial novelty preference in a spontaneous exploration Y-maze task, and were impaired on a T-maze task in which distinctive inserts present on the floor of the maze determined which goal arm contained the reward, but only if there was a discontiguity between the conditional cue and the place at which the reward was delivered. This dissociation of spatial memory into distinctive components is strikingly similar to results obtained with mice lacking glutamate receptor-A (GluR-A)-containing AMPA receptors, which support long-term potentiation expression. These results identify a specific role for a NMDAR-dependent signaling pathway that leads to the activation of a GluR-A-dependent expression mechanism in a rapidly acquired, flexible form of spatial memory. This mechanism depends on the C-terminal intracellular domain of the NR2A subunit. In contrast, the ability to associate a particular spatial location with the water maze escape platform or food reward is NR2A independent, as well as GluR-A independent.

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Language(s): eng - English
 Dates: 2007-11-092007-05-142007-12-042008-04-02
 Publication Status: Published in print
 Pages: 8
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
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Title: European Journal of Neuroscience : European Neuroscience Association
  Other : Eur. J. Neurosci
Source Genre: Journal
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Publ. Info: Oxford, UK : Published on behalf of the European Neuroscience Association by Oxford University Press
Pages: - Volume / Issue: 28 (14) Sequence Number: - Start / End Page: 3623 - 3630 Identifier: ISSN: 0953-816X
CoNE: https://pure.mpg.de/cone/journals/resource/954925575988