Down‐Regulation of Hypothalamic Kisspeptin and its Receptor, Kiss1r , mRNA Expression is Associated with Stress‐Induced Suppression of Luteinising Hormone Secretion in the Female Rat
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Identification of kisspeptin (Kiss1) and its G protein‐coupled receptor 54 (Kiss1r) as an essential component of the hypothalamic‐pituitary‐gonadal (HPG) axis controlling gonadotrophin secretion raises the possibility that kisspeptin‐Kiss1r signalling may play a critical role in the transduction of stress‐induced suppression of reproduction. We examined the effects of: (i) three different stressors, known to suppress pulsatile luteinising hormone (LH) secretion; (ii) corticotrophin‐releasing factor (CRF); and (iii) corticosterone on Kiss1 and Kiss1r expression in key hypothalamic sites regulating gonadotrophin secretion: the medial preoptic area (mPOA) and arcuate nucleus (ARC). Ovariectomised oestrogen‐replaced rats were implanted with i.v., subcutaneous or i.c.v. cannulae. Blood samples were collected at 5‐min intervals for 5–6 h for detection of LH. Quantitative reverse transcriptase‐polymerase chain reaction was used to determine Kiss1 and Kiss1r mRNA levels in brain punches of the mPOA and ARC collected 6 h after restraint, insulin‐induced hypoglycaemia or lipopolysaccharide stress, or after i.c.v. administration of CRF, or acute or chronic subcutaneous administration of corticosterone. We observed down‐regulation of at least one component of the kisspeptin‐Kiss1r signalling system by each of the stress paradigms within the mPOA and ARC. CRF decreased Kiss1 and Kiss1r expression in both the mPOA and ARC. Both acute and chronic stress levels of corticosterone resulted in a concomitant decrease in Kiss1 and an increase in kiss1r mRNA expression in the mPOA and ARC. This differential regulation of Kiss1 and Kiss1r might account for the lack of effect corticosterone has on pulsatile LH secretion. Considering the pivotal role for kisspeptin‐Kiss1r signalling in the control of the HPG axis, these results suggest that the reduced Kiss1‐Kiss1r expression may be a contributing factor in stress‐related suppression of LH secretion.
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In multiple species, psychosocial stress exposure or exogenous CORT inhibited pulsatile LH release.
“In multiple species, psychosocial stress exposure or treatment with exogenous CORT inhibited the pulsatile release of LH79–81”
From Emerging insights into hypothalamic‐pituitary‐gonadal axis regulation and interaction with stress signalling (2018) · cites this paper as [80]
The Results (p. 4) report that restraint, hypoglycaemic and LPS stress suppressed pulsatile LH secretion in female rats. The Discussion (pp. 6–7) says the opposite for exogenous corticosterone at physiological stress levels: neither acute nor chronic administration suppressed LH pulsatility in these rats. It discusses glucocorticoid-related suppression in other species, but that does not support the claim as stated for corticosterone treatment in this study. (LLM, conf=0.88)
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- Authors
- Kinsey‐Jones, J. S., Li, X. F., Knox, A. M. I., Wilkinson, E. S., Zhu, X. L., Chaudhary, A. A., Milligan, S. R., Lightman, S. L., & O’Byrne, K. T.
- Affiliations
- King's College London (GB)
- University of Bristol (GB)
- Corresponding author
- O’Byrne, K. T.
- ORCID
- Lightman, S. L.
- Venue
- Journal of Neuroendocrinology
- Publisher
- Wiley
- Published
- 2008-12-15
- Volume
- 21
- Issue
- 1
- Pages
- 20-29
- ISSN
- 0953-8194 (ISSN-L)
- 1365-2826
- OpenAlex
- W2009659460
- Cited by
- 196
- References
- 67
- Citations by year
- 2026: 7 · 2025: 7 · 2024: 10 · 2023: 9 · 2022: 15 · 2021: 11 · 2020: 9 · 2019: 9 · 2018: 13 · 2017: 10 · 2016: 5 · 2015: 16 · 2014: 13 · 2013: 18 · 2012: 11
- FWCI
- 12.78
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Journal of Neuroendocrinology (publishedVersion)
- PubMed (publishedVersion)
- UCL Discovery (University College London) (submittedVersion)
- Research Portal (King's College London) (submittedVersion)
- Bristol Research (University of Bristol) (submittedVersion)
- Explore Bristol Research (submittedVersion)
- Funders
- Wellcome Trust
- Home Office
- Biotechnology and Biological Sciences Research Council (BB/F007396/1)
- Topics
- Health Sciences › Medicine › Reproductive Medicine › Hypothalamic control of reproductive hormones
- Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuropeptides and Animal Physiology
- Life Sciences › Neuroscience › Behavioral Neuroscience › Stress Responses and Cortisol
- Keywords
- kisspeptin, KISS1R, hypothalamic-pituitary-gonadal axis, corticotropin-releasing factor, corticosterone, medial preoptic area, arcuate nucleus, insulin-induced hypoglycemia, restraint stress, pulsatile LH secretion, female reproduction
- MeSH terms
- Receptors, Kisspeptin-1, Animals, Corticosterone, Corticotropin-Releasing Hormone, Estradiol, Female, Hypothalamus, Luteinizing Hormone, Ovariectomy, Proteins, Restraint, Physical, Stress, Psychological, Down-Regulation, Rats, Sprague-Dawley, Tumor Suppressor Proteins, Receptors, G-Protein-Coupled, Rats, Kisspeptins
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
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