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Age-related alterations in GABA A receptor subunits in the nonhuman primate hippocampus
Journal article   Peer reviewed

Age-related alterations in GABA A receptor subunits in the nonhuman primate hippocampus

Robert A. Rissman, Romy Nocera, Laura M. Fuller, Jeffrey H. Kordower and David M. Armstrong
Brain research, v 1073, pp 120-130
2006
PMID: 16430870

Abstract

Aging Benzodiazepine Densitometry GABA receptor subunit Hippocampus Immunohistochemistry Nonhuman primate
Pharmacological studies have documented that altered drug responses, particularly to benzodiazepines, are common in elderly populations. While numerous factors may contribute to changes in drug response, age-related alterations in the molecular composition of GABA A receptors may be a key factor in regulating these responses. We employed quantitative densitometry to examine the cytological features and density of highly prevalent hippocampal GABA A receptor subunits (α1 and β2/3) in young and aged rhesus monkeys. α1 and β2/3 subunit immunostaining was differentially distributed throughout the hippocampus. In addition, β2/3 immunolabeling in aged monkeys was characterized by marked intersubject variability in labeling intensity, with dramatic reductions present in 3 of 5 samples. α1 immunolabeling in aged monkeys was significantly reduced in the CA2 and CA3 subregions, and in hilus/polymorphic layer of the dentate gyrus. Collectively, our findings demonstrate that not only are GABA A receptor subunits differentially distributed throughout the hippocampus, but they are also differentially altered with increased age—changes that may have an important impact on the binding properties of GABA A receptor pharmacological agents.

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Domestic collaboration
Web of Science research areas
Neurosciences
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