Document Detail


Predominant expression of GluR2 among the AMPA receptor subunits in neuronal progenitor cells of the rat hippocampus.
MedLine Citation:
PMID:  15351509     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Cells derived from the hippocampus of embryonic day 18 (E18) rats were cultured in B27-supplemented Neurobasal medium without serum. We found the presence of numerous small cells with round or elliptical somata and fine processes in this primary culture. These cells were first detectable on culture day 8 and gradually increased in number that reached the maximum on approximately day 14. They incorporated bromodeoxyuridine (BrdU) and expressed nestin, a marker of stem cells and progenitor cells. Furthermore, nearly a half of these cells also expressed neuron-specific beta tubulin. On the other hand, they did not express O4 and glial fibrillary acid protein (GFAP), markers of oligodendrocytes and astrocytes, respectively. Thus, these small cells are most likely to be neuronal progenitor cells. The whole-cell patch clamp studies revealed that these cells expressed voltage-gated Na+, Ca2+ and K+ channels. With regard to ligand-gated channels, these cells were sensitive to alpha-amino-3-hydroxy-5-methyl-4-isoxazolepropionate (AMPA), but not to N-methyl-D-aspartate (NMDA). The current-voltage relationship of the AMPA-induced current was slightly outwardly rectifying, suggesting that the AMPA receptors contained the GluR2 subunit in their oligomeric assemblies. The single-cell reverse transcription (RT)-PCR analysis revealed that GluR2 is predominant over the other AMPA receptor subunits in these cells. Furthermore, GluR2 was expressed mainly in the flip form.
Authors:
Norikazu Hagimura; Keisuke Tsuzuki; Masae Iino; Yusuke Takatsuru; Yukari Yoshida; Shoji Kishi; Seiji Ozawa
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Brain research. Developmental brain research     Volume:  152     ISSN:  0165-3806     ISO Abbreviation:  Brain Res. Dev. Brain Res.     Publication Date:  2004 Sep 
Date Detail:
Created Date:  2004-09-07     Completed Date:  2005-11-08     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8908639     Medline TA:  Brain Res Dev Brain Res     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  213-23     Citation Subset:  IM    
Affiliation:
Department of Neurophysiology, Gunma University Graduate School of Medicine, 3-39-22 Showa-machi, Maebashi 371-8511, Japan.
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MeSH Terms
Descriptor/Qualifier:
Animals
Biological Markers / metabolism
Cell Differentiation / physiology
Cells, Cultured
Excitatory Amino Acid Agonists / pharmacology
Hippocampus / embryology*,  metabolism*
Intermediate Filament Proteins / metabolism
Ion Channels / drug effects,  metabolism
Nerve Tissue Proteins / metabolism
Neurons / drug effects,  metabolism*
Patch-Clamp Techniques
RNA, Messenger / metabolism
Rats
Rats, Wistar
Receptors, AMPA / drug effects,  genetics,  metabolism*
Stem Cells / drug effects,  metabolism*
Tubulin / metabolism
Chemical
Reg. No./Substance:
0/Biological Markers; 0/Excitatory Amino Acid Agonists; 0/Intermediate Filament Proteins; 0/Ion Channels; 0/Nerve Tissue Proteins; 0/RNA, Messenger; 0/Receptors, AMPA; 0/Tubulin; 0/glutamate receptor ionotropic, AMPA 2; 0/nestin

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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