Cited by 184Neuroscience and Neuropharmacology ResearchCircadian rhythm and melatoninHypothalamic control of reproductive hormones

GABA and glutamate mediate rapid neurotransmission from suprachiasmatic nucleus to hypothalamic paraventricular nucleus in rat

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Hermes, M L, Coderre, E M, Buijs, R M, Renaud, L P·1996·The Journal of Physiology

Abstract

1. Intracellular sharp electrode and whole-cell patch-clamp recording from characterized paraventricular nucleus (PVN) neurones in rat hypothalamic slices were used to study the synaptic mechanism and associated neurotransmitters that mediate their response to suprachiasmatic nucleus (SCN) stimulation. 2. Electrical stimulation restricted to SCN evoked short-latency inhibitory postsynaptic potentials (IPSPs) or combinations of IPSPs and excitatory postsynaptic potentials (EPSPs) in all (n = 59) PVN neurones tested. Type I neurones (n = 18) were magnocellular and a majority (13/18) demonstrated monosynaptic IPSPs that reversed polarity at the chloride equilibrium potential and were sensitive to bicuculline. 3. Type II (n = 10) and III parvocellular (n = 13), and unclassifiable neurones (n = 18) displayed combinations of IPSPs and EPSPs following similar stimuli applied to SCN. IPSP blockade with bicuculline uncovered SCN-evoked monosynaptic dual-component EPSPs that were sensitive to N-methyl-D-aspartate (NMDA) and non-NMDA receptor antagonists. In addition, chemical microstimulation within SCN was associated with transient increases in spontaneous EPSPs recorded from these PVN neurones. 4. These data imply that the amino acids GABA and glutamate are important mediators of fast monosynaptic transmission from SCN to defined neurones in PVN, and are candidates for conveying circadian rhythmicity to PVN regulation of neuroendocrine and autonomic processes.

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Crossref · 10.1113/jphysiol.1996.sp021724

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Research works printed but not linked: 1

  1. König A., Martin B. Tagesperiodische Schwankungen des neurohypophysären Oxytocingehaltes bei männlichen Wistar-Ratten. Acta Endocrinol (Copenh) 1968 May;58(1):98–100. [PubMed] [Google Scholar]

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Authors
Hermes, M. L., Coderre, E. M., Buijs, R. M., & Renaud, L. P.
Affiliations
University of Ottawa (CA)
Venue
The Journal of Physiology
Publisher
Wiley
Published
1996-11
Volume
496
Issue
3
Pages
749-757
ISSN
  • 0022-3751 (ISSN-L)
  • 1469-7793
OpenAlex
W2023286290
Cited by
184
References
33
Citations by year
2026: 1 · 2024: 1 · 2023: 1 · 2022: 3 · 2021: 3 · 2020: 2 · 2019: 6 · 2018: 5 · 2017: 2 · 2016: 4 · 2015: 4 · 2014: 7 · 2013: 7 · 2012: 6
FWCI
2.16
Type
journal article
Language
en
Open access
Locations
  • The Journal of Physiology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • KNAW Research Portal (The Royal Netherlands Academy of Arts and Sciences) (publishedVersion)
  • Data Archiving and Networked Services (DANS) (submittedVersion, other-oa)
Funders
Heart and Stroke Foundation of Canada
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
  • Health Sciences › Medicine › Reproductive Medicine › Hypothalamic control of reproductive hormones
Keywords
suprachiasmatic nucleus, paraventricular nucleus, GABA, glutamate, monosynaptic transmission, inhibitory postsynaptic potentials, excitatory postsynaptic potentials, circadian rhythm, hypothalamus, magnocellular neurons, parvocellular neurons, NMDA receptor, non-NMDA receptors, bicuculline, chloride equilibrium potential, neuroendocrine regulation
MeSH terms
Animals, Bicuculline, Electric Stimulation, Evoked Potentials, gamma-Aminobutyric Acid, Male, Synaptic Transmission, Neurons, Paraventricular Hypothalamic Nucleus, Suprachiasmatic Nucleus, Time Factors, Patch-Clamp Techniques, Glutamic Acid, Rats, In Vitro Techniques

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