Cited by 485Neonatal and fetal brain pathologyNeuroscience and Neuropharmacology ResearchNeuroendocrine regulation and behavior

Maternal Oxytocin Triggers a Transient Inhibitory Switch in GABA Signaling in the Fetal Brain During Delivery

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Tyzio, Roman, Cossart, Rosa, Khalilov, Ilgam, Minlebaev, Marat, Hübner, Christian A., Represa, Alfonso, Ben-Ari, Yehezkel, Khazipov, Rustem·2006·Science

Abstract

We report a signaling mechanism in rats between mother and fetus aimed at preparing fetal neurons for delivery. In immature neurons, gamma-aminobutyric acid (GABA) is the primary excitatory neurotransmitter. We found that, shortly before delivery, there is a transient reduction in the intracellular chloride concentration and an excitatory-to-inhibitory switch of GABA actions. These events were triggered by oxytocin, an essential maternal hormone for labor. In vivo administration of an oxytocin receptor antagonist before delivery prevented the switch of GABA actions in fetal neurons and aggravated the severity of anoxic episodes. Thus, maternal oxytocin inhibits fetal neurons and increases their resistance to insults during delivery.

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Crossref · 10.1126/science.1133212

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  • Oxytocin supports the critical transition from excitatory to inhibitory GABA functioning, catalyzing neurons to undergo electrophysical changes, critical for the infant's survival because the oxytocin-dependent GABA transition protects the fetal brain from hypoxic conditions that otherwise might take place during parturition.

    “Oxytocin supports the critical transition from excitatory to inhibitory functioning, catalyzing neurons to undergo electrophysical changes, critical for the infant’s survival because the oxytocin-dependent GABA transition protects the fetal brain from hypoxic conditions that otherwise might take place during parturition.”

    From The evolved nest, oxytocin functioning, and prosocial development (2023) · cites this paper as Tyzio et al., 2006

  • Shortly before delivery a reduction in the intracellular chloride concentration of neurons induced by oxytocin leads to a transitory excitatory-to-inhibitory switch of GABA actions.

    “Shortly before delivery a reduction in the intracellular chloride concentration of neurons induced by oxytocin leads to a transitory excitatory-to-inhibitory switch of GABA actions 29 .”
  • The transitory excitatory-to-inhibitory switch of GABA actions shortly before delivery is thought to increase the resistance of neurons to hypoxia and ischemic damage during delivery.

    “This is thought to increase the resistance of neurons to hypoxia and ischemic damage during delivery.”

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Authors
Tyzio, R., Cossart, R., Khalilov, I., Minlebaev, M., Hübner, C. A., Represa, A., Ben-Ari, Y., & Khazipov, R.
Affiliations
  • Inserm (FR)
  • Institut de Neurobiologie de la Méditerranée, INSERM U29, Université de la Méditerranée, Campus Scientifique de Luminy, Boite Postale 13, 13273 Marseille Cedex 09, France.
Venue
Science
Published
2006-12-15
Volume
314
Issue
5806
Pages
1788-1792
ISSN
  • 0036-8075 (ISSN-L)
  • 1095-9203
OpenAlex
W2052465889
Cited by
485
References
32
Citations by year
2026: 4 · 2025: 18 · 2024: 16 · 2023: 11 · 2022: 28 · 2021: 29 · 2020: 36 · 2019: 29 · 2018: 42 · 2017: 31 · 2016: 31 · 2015: 24 · 2014: 30 · 2013: 26 · 2012: 23
FWCI
20.12
Type
journal article
Language
en
Open access
Licence
other-oa
Locations
  • Science (publishedVersion)
  • PubMed (publishedVersion)
  • HAL (submittedVersion, other-oa)
Topics
  • Health Sciences › Medicine › Pediatrics, Perinatology and Child Health › Neonatal and fetal brain pathology
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Social Sciences › Psychology › Social Psychology › Neuroendocrine regulation and behavior
Keywords
fetal brain, GABA signaling, intracellular chloride, oxytocin receptor, labor, anoxia, fetal neurons, neuroprotection
MeSH terms
Action Potentials, Animals, Animals, Newborn, Benzamides, Chlorides, Female, Fetal Hypoxia, Fetus, gamma-Aminobutyric Acid, Hippocampus, Indoles, Maternal-Fetal Exchange, Neural Inhibition, Neurons, Oxytocin, Pregnancy, Receptors, GABA-A, Vasotocin, Signal Transduction, Rats, Wistar, Receptors, Oxytocin, Patch-Clamp Techniques, Sodium-Potassium-Chloride Symporters, Parturition, Sodium Potassium Chloride Symporter Inhibitors, Rats, GABA-A Receptor Agonists, GABA-A Receptor Antagonists, Solute Carrier Family 12, Member 2, In Vitro Techniques

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