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Age-related changes in glutamate receptors: an autoradiographic analysis.

Authors
  • Wardas, J
  • Pietraszek, M
  • Schulze, G
  • Ossowska, K
  • Wolfarth, S
Type
Published Article
Journal
Polish journal of pharmacology
Publication Date
Jan 01, 1997
Volume
49
Issue
6
Pages
401–410
Identifiers
PMID: 9566043
Source
Medline
License
Unknown

Abstract

The aim of the present study was to evaluate age-related changes in NMDA and AMPA receptors in old female rats. To this end a quantitative autoradiography of [3H]-MK-801 and [3H]-AMPA binding was performed in the brain of young (3-month-old), middle-aged (12-month-old) and old (36-month-old) rats. Moreover, the binding of [3H]-spiperone to D2 dopamine receptors was also examined. No changes were observed in the binding of [3H]-MK-801 or [3H]-AMPA in middle-aged rats compared to young ones. In the caudate-putamen and shell and core of the nucleus accumbens septi of old rats, a pronounced decrease in the [3H]-MK-801 binding and a decreasing tendency in the [3H]-AMPA binding were observed. Furthermore, the binding of [3H]-MK-801 and [3H]-AMPA was reduced in the hippocampal formation and, additionally, a marked decline in the [3H]-MK-801 binding in different parts of the cerebral cortex including the frontal, parietal, cingulate, pyriform and insular cortices was found. The [3H]-spiperone binding progressively decreased with age in the dorsolateral, ventrolateral and medial caudate-putamen. The present results show that aging processes lead to changes in the binding of both [3H]-MK-801 to NMDA and [3H]-AMPA to AMPA receptors in a number of structures, a phenomenon which may reflect motor and memory disturbances found in old rats and elderly humans.

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