Regional, cellular, and ultrastructural distribution of N-methyl-D- aspartate receptor subunit 1 in monkey hippocampus

S. J. Siegel, N. Brose, W. G. Janssen, G. P. Gasic, R. Jahn, S. F. Heinemann, John Morrison

Research output: Contribution to journalArticle

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Abstract

The regional, cellular, and subcellular distributions of N-methyl-D- aspartate (NMDA) receptor subunit 1, NMDAR-1, were investigated in monkey hippocampus by using a monoclonal antibody directed against a fusion protein corresponding to aa 660-811 of NMDAR-1. The data indicate that many neurons in each subfield of the hippocampus contain NMDAR-1 protein, although the intensity and distribution of immunoreactivity varied across regions, strata, and cellular compartments. In stratum lucidum of CA3, mossy fiber axons were immunoreactive for NMDAR-1, which may correspond to previously hypothesized presynaptic receptors. NMDAR-1-labeled postsynaptic profiles were present in stratum radiatum of CA3 but were largely absent from stratum lucidum. Such intraneuronal segregation of glutamate receptor subunits or classes may be spatially correlated with afferent systems that exhibit laminar segregation and terminate in different portions of the postsynaptic dendritic tree. For example, in CA3 pyramidal cells, NMDA receptors are postsynaptic in distal apical dendrites (stratum radiatum), where NMDA-dependent long-term potentiation in rats is mediated by associational/commissural afferents, and are absent from proximal apical dendrites (stratum lucidum), where NMDA- independent long-term potentiation is mediated by the mossy fiber input.

Original languageEnglish (US)
Pages (from-to)564-568
Number of pages5
JournalProceedings of the National Academy of Sciences of the United States of America
Volume91
Issue number2
DOIs
StatePublished - Jan 1 1994
Externally publishedYes

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Hippocampal CA3 Region
Long-Term Potentiation
N-Methylaspartate
Dendrites
N-Methyl-D-Aspartate Receptors
Haplorhini
Hippocampus
Presynaptic Receptors
Pyramidal Cells
Glutamate Receptors
Axons
Proteins
Monoclonal Antibodies
Neurons

ASJC Scopus subject areas

  • General

Cite this

Regional, cellular, and ultrastructural distribution of N-methyl-D- aspartate receptor subunit 1 in monkey hippocampus. / Siegel, S. J.; Brose, N.; Janssen, W. G.; Gasic, G. P.; Jahn, R.; Heinemann, S. F.; Morrison, John.

In: Proceedings of the National Academy of Sciences of the United States of America, Vol. 91, No. 2, 01.01.1994, p. 564-568.

Research output: Contribution to journalArticle

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