Cited by 187Neuroendocrine regulation and behaviorNeuropeptides and Animal PhysiologyReproductive Physiology in Livestock

Cerebrospinal fluid levels of acetylcholinesterase, monoamines and oxytocin during labour, parturition, vaginocervical stimulation, lamb separation and suckling in sheep

Kendrick, Keith M., Keverne, Eric B., Baldwin, Basil A., Sharman, Dennis F.·2008·Neuroendocrinology

Abstract

Acetylcholinesterase (AChE) activity, and concentrations of monoamines, monoamine metabolites and oxytocin (OT) were measured in the cerebrospinal fluid (CSF) of sheep during late pregnancy, labour, parturition, vaginocervical stimulation, lamb separation and suckling. Concentrations of AChE, 4-hydroxy-3 methoxyphenylethan-1,2-diol (MHPG) and OT were significantly elevated during labour and parturition. OT levels were also significantly raised in cycling ewes given vaginocervical stimulation. Separation of the ewes from their lambs (0.5-2 h) caused significant increases in AChE and MHPG, but not in OT. During suckling, following reunion of the ewes and lambs, concentrations of AChE and OT were significantly raised. The dopamine metabolites 3,4-dihydroxyphenylacetic acid and homovanillic acid were significantly lower in CSF during late pregnancy than during parturition and post-partum. Intravenous injections of OT which produced high circulating levels of this hormone in plasma produced significant, but very small, increases in concentrations of OT in the CSF. Our results show that in the sheep, labour, parturition, suckling and vaginocervical stimulation provoke a release of OT in the brain similar to that in the peripheral circulation. Changes in CSF levels of AChE and MHPG during labour, parturition and lamb separation, but not during vaginocervical stimulation, may be related to stress or hypertension.

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Crossref · 10.1159/000124638

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Authors
Kendrick, K. M., Keverne, E. B., Baldwin, B. A., & Sharman, D. F.
Affiliations
University of Cambridge (GB)
Venue
Neuroendocrinology
Publisher
S. Karger AG
Published
2008-04-01
Volume
44
Issue
2
Pages
149-156
ISSN
  • 0028-3835 (ISSN-L)
  • 1423-0194
OpenAlex
W2005665656
Cited by
187
References
0
Citations by year
2026: 2 · 2025: 1 · 2024: 3 · 2023: 4 · 2022: 5 · 2021: 4 · 2020: 2 · 2019: 2 · 2018: 1 · 2017: 4 · 2016: 3 · 2015: 4 · 2014: 8 · 2013: 7 · 2012: 6
FWCI
9.74
Type
journal article
Language
en
Open access
closed
Locations
  • Neuroendocrinology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Social Sciences › Psychology › Social Psychology › Neuroendocrine regulation and behavior
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuropeptides and Animal Physiology
  • Life Sciences › Agricultural and Biological Sciences › Agronomy and Crop Science › Reproductive Physiology in Livestock
Keywords
cerebrospinal fluid, acetylcholinesterase, oxytocin, monoamines, MHPG, dopamine metabolites, labour, childbirth, vaginocervical stimulation, suckling, sheep, neuroendocrine stress response
MeSH terms
Acetylcholinesterase, Animals, Animals, Suckling, Anxiety, Separation, Biogenic Amines, Blood-Brain Barrier, Cervix Uteri, Female, Labor, Obstetric, Oxytocin, Pregnancy, Radioimmunoassay, Sheep, Vagina

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