Kisspeptin and seasonality in sheep
Open accessAbstract
Sheep are seasonal breeders, experiencing a period of reproductive quiescence during spring and early summer. During the non-breeding period, kisspeptin expression in the arcuate nucleus is markedly reduced. This strongly suggests that the mechanisms that control seasonal changes in reproductive function involve kisspeptin neurons. Kisspeptin cells appear to regulate GnRH neurons and transmit sex-steroid feedback to the reproductive axis. Since the non-breeding season is characterized by increased negative feedback of estrogen on GnRH secretion, the kisspeptin neurons seem to be fundamentally involved in the determination of breeding state. The reduction in kisspeptin neuronal function during the non-breeding season can be corrected by infusion of kisspeptin, which causes ovulation in seasonally acyclic females.
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In mammals, the pulsatile secretion of GnRH is reduced in the nonbreeding (anestrous) season, and the reactivation of the hypothalamic-pituitary-gonadal axis is dictated by a seasonal-dependent increase in kisspeptin expression and a concomitant reduction in Gonadotropin-inhibitory hormone (GnIH) production.
“In mammals, the pulsatile secretion of GnRH is reduced in the nonbreeding (anestrous) season, and the reactivation of the hypothalamic–pituitary–gonadal axis is dictated by a seasonal-dependent increase in kisspeptin expression and a concomitant reduction in Gonadotropin-inhibitory hormone (GnIH) production (26–28).”
From Corazonin signaling integrates energy homeostasis and lunar phase to regulate aspects of growth and sexual maturation in <i>Platynereis</i> (2020) · cites this paper as [27]
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Kisspeptin Signaling in the Brain
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- Authors
- Clarke, I. J., Smith, J. T., Caraty, A., Goodman, R. L., & Lehman, M. N.
- Affiliations
- Monash University (AU)
- Université de Tours (FR)
- West Virginia University (US)
- Western University (CA)
- Corresponding author
- Clarke, Iain J.
- Venue
- Peptides
- Publisher
- Elsevier BV
- Published
- 2009-01
- Volume
- 30
- Issue
- 1
- Pages
- 154-163
- ISSN
- 0196-9781 (ISSN-L)
- PMC
- PMC3712824
- OpenAlex
- W2066860383
- Cited by
- 96
- References
- 43
- Citations by year
- 2026: 5 · 2025: 6 · 2024: 4 · 2023: 4 · 2022: 6 · 2021: 5 · 2020: 7 · 2019: 3 · 2018: 2 · 2017: 1 · 2016: 4 · 2015: 2 · 2014: 1 · 2013: 8 · 2012: 7
- FWCI
- 1.44
- Type
- journal article
- Language
- en
- Open access
- green
- www.ncbi.nlm.nih.gov
- Locations
- Peptides (publishedVersion)
- PubMed (publishedVersion)
- Europe PMC (PubMed Central) (acceptedVersion)
- PubMed Central (acceptedVersion)
- UWA Profiles and Research Repository (UWA) (submittedVersion)
- HAL (submittedVersion)
- Funders
- Eunice Kennedy Shriver National Institute of Child Health and Human Development (R01HD039916)
- Topics
- Health Sciences › Medicine › Reproductive Medicine › Hypothalamic control of reproductive hormones
- 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
- kisspeptin, seasonal variation, sheep, seasonal reproduction, reproductive quiescence, arcuate nucleus, GnRH neurons, estrogen negative feedback, sex steroid feedback, ovulation
- MeSH terms
- Animals, Gonadotropins, Hypothalamus, Gonadotropin-Releasing Hormone, Melatonin, Reproduction, Seasons, Sheep, Gene Expression, Photoperiod, Tumor Suppressor Proteins
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