Cited by 40Neuroscience and Neuropharmacology ResearchAmino Acid Enzymes and MetabolismReceptor Mechanisms and Signaling

Kainate acts at presynaptic receptors to increase GABA release from hypothalamic neurons

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Liu, Qing-Song, Patrylo, Peter R., Gao, Xiao-Bing, van den Pol, Anthony N.·1999·Journal of Neurophysiology

Abstract

Recent reports suggest that kainate acting at presynaptic receptors reduces the release of the inhibitory transmitter GABA from hippocampal neurons. In contrast, in the hypothalamus in the presence of alpha-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA) and N-methyl-D-aspartate (NMDA) receptor antagonists [1-(4-methyl-7,8-methylenedioxy-5H-2,3-benzodiazepine (GYKI 52466) and D,L-2-amino-5-phosphonopentanoic acid (AP5)], kainate increased GABA release. In the presence of tetrodotoxin, the frequency, but not the amplitude, of GABA-mediated miniature inhibitory postsynaptic currents (IPSCs) was enhanced by kainate, consistent with a presynaptic site of action. Postsynaptic activation of kainate receptors on cell bodies/dendrites was also found. In contrast to the hippocampus where kainate increases excitability by reducing GABA release, in the hypothalamus where a much higher number of GABAergic cells exist, kainate-mediated activation of transmitter release from inhibitory neurons may reduce the level of neuronal activity in the postsynaptic cell.

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Crossref · 10.1152/jn.1999.82.2.1059

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  • Agonism of presynaptic kainate receptors in hypothalamic neurons facilitates inhibitory GABAergic signaling.

    “Similarly, agonism of presynaptic kainate receptors in hypothalamic neurons facilitates inhibitory GABAergic signaling (Liu et al., 1999).”

    From Glutamate receptors in domestication and modern human evolution (2020) · cites this paper as Liu et al., 1999

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Authors
Liu, Q.-S., Patrylo, P. R., Gao, X.-B., & van den Pol, A. N.
Affiliations
  • Yale University (US)
  • Department of Neurosurgery, Yale University Medical School, New Haven, Connecticut 06520
Venue
Journal of Neurophysiology
Published
1999-08-01
Volume
82
Issue
2
Pages
1059-1062
ISSN
  • 0022-3077 (ISSN-L)
  • 1522-1598
OpenAlex
W2216130557
Cited by
40
References
26
Citations by year
2021: 2 · 2019: 2 · 2018: 1 · 2015: 1 · 2013: 1 · 2012: 1
FWCI
1.33
Type
journal article
Language
en
Open access
Locations
  • Journal of Neurophysiology (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Science Foundation
  • Yale University (CT 06520)
  • National Institutes of Health (1r01ns031573-01a3)
  • National Institute of Neurological Disorders and Stroke (NS37788, NS31573, NS 34887, R01NS037788, R01NS034887)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biochemistry › Amino Acid Enzymes and Metabolism
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Receptor Mechanisms and Signaling
Keywords
kainate receptors, presynaptic inhibition, GABA release, hypothalamic neurons, inhibitory postsynaptic currents, miniature IPSCs, tetrodotoxin, neuronal excitability
MeSH terms
Animals, Benzodiazepines, Cells, Cultured, gamma-Aminobutyric Acid, Hypothalamus, Kainic Acid, Neurons, Anti-Anxiety Agents, Rats, Sprague-Dawley, Receptors, Presynaptic, Patch-Clamp Techniques, Excitatory Amino Acid Antagonists, Rats, In Vitro Techniques

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