Abstract:
:N-methyl-D-aspartate receptors (NMDA-Rs) activation has been implicated in various forms of synaptic plasticity depending on the receptor subtypes involved. However, the contribution of NR2A and NR2B subunits in glycine-induced long-term potentiation (LTP) of miniature excitatory postsynaptic currents (mEPSCs) in layer II/III pyramidal neurons of the rat visual cortex remains unclear. The present study used whole-cell patch-clamp recordings in vitro to investigate the role of NR2A-containing and NR2B-containing NMDA-Rs in glycine-induced LTP in visual cortical slices from 13-15 day old rats. We found that glycine-induced LTP of mEPSCs was readily induced in layer II/III pyramidal neurons of the rat visual cortex with glycine. D-APV, a selective NMDA-R antagonist, blocked the glycineinduced LTP. Moreover, the selective NR2B-containing NMDA-R antagonists (Ro 25-6981) displayed no influence on the glycine-induced LTP. However, Zn2+, a voltage-independent NR2A-containing NMDA-R antagonist, prevented glycine-induced LTP. These results suggest that the glycine-induced LTP in layer II/III pyramidal neurons of the rat visual cortex is NMDA-R-dependent and requires NR2A-containing NMDA-Rs, not NR2B-containing NMDA-Rs.
journal_name
Curr Neurovasc Resjournal_title
Current neurovascular researchauthors
Li YH,Wang Jdoi
10.2174/156720213804805927subject
Has Abstractpub_date
2013-02-01 00:00:00pages
70-5issue
1eissn
1567-2026issn
1875-5739pii
CNR-EPUB-20121112-9journal_volume
10pub_type
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