Neurochemical Research

, Volume 11, Issue 7, pp 1073–1082 | Cite as

The distribution of [3H]kainate binding sites in primate hippocampus is similar to the distribution of both Ca2+-sensitive and Ca2+-insensitive [3H]kainate binding sites in rat hippocampus

  • Daniel T. Monaghan
  • Long Nguyen
  • Carl W. Cotman
Original Articles

Abstract

The distribution of [3H]kainate binding sites was determined by quantitative autoradiography in three vertebrate species: rat, monkey, and human. These animals displayed a similar pattern of binding site density in the hippocampus. Highest levels were found within the stratum lucidum and moderate levels in the inner portion of the dentate gyrus molecular layer. Although the distribution is similar, there is a lower density of binding sites in the stratum lucidum of primates than in rodents. Experiments using rat brain synaptic plasma membrane fractions indicated that inclusion of Ca2+ ions results in a selective reduction in binding at the high affinity sites. The Ca2+-inhibited and Ca2+-insensitive binding sites in the rat hippocampus exhibited a similar distribution. Together, these results suggest that in a variety of mammalian species kainate receptors exhibit similar regional distributions, and that the high anf loe affinity kainate binding sites also exhibit similar regional distributions.

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Copyright information

© Plenum Publishing Corporation 1986

Authors and Affiliations

  • Daniel T. Monaghan
    • 1
  • Long Nguyen
    • 1
  • Carl W. Cotman
    • 1
  1. 1.Department of PsychobiologyUniversity of CaliforniaIrvine

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