Linked Life Data

11640931

Source:http://linkedlifedata.com/resource/pubmed/id/11640931

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6
pubmed:dateCreated
2001-10-19
pubmed:abstractText
The NMDA receptor (NMDAR) is a heteromer comprised of NR1 and NR2 subunits. Mice that overexpress the NR2B subunit exhibit enhanced hippocampal LTP, prolonged NMDAR currents, and improved memory ( Tang et al., 1999). In the current study, we explored visual cortex plasticity and NMDAR function in NR2B overexpressing transgenic mice. Unlike the hippocampus, in vitro synaptic plasticity of the visual cortex was unaltered by NR2B overexpression. Consistent with the plasticity findings, NMDAR excitatory postsynaptic current (EPSC) durations from layer 2/3 pyramidal cells were similar in wild-type (wt) and transgenic (tg) mice. Furthermore, temporal summation of NMDAR EPSCs to 10, 20, and 40 Hz stimulation did not differ between cells from wt and tg mice. Finally, although in situ studies clearly demonstrate overexpression of NR2B mRNA in visual cortex, we failed to observe a significant elevation in the synaptic expression of NR2B protein. We conclude that the synaptic ratio of NR2B over NR2A in the NMDA receptor complex in the visual cortex is not significantly influenced by the transgene overexpression. These data suggest that mRNA availability is not a limiting factor for the synthesis of NR2B protein in the visual cortex, and support the hypothesis that levels of NR2A, rather than NR2B, normally determine the subunit composition of NMDARs in visual cortex.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Nov
pubmed:issn
0028-3908
pubmed:author
pubmed:issnType
Print
pubmed:volume
41
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
762-70
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
2001
pubmed:articleTitle
Effect of transgenic overexpression of NR2B on NMDA receptor function and synaptic plasticity in visual cortex.
pubmed:affiliation
Howard Hughes Medical Institute, Department of Neuroscience, Brown University, Box 1953, Providence, RI 02912, USA.
pubmed:publicationType
Journal Article, In Vitro, Research Support, U.S. Gov't, P.H.S., Research Support, U.S. Gov't, Non-P.H.S., Research Support, Non-U.S. Gov't