Cited by 72Ovarian function and disordersHypothalamic control of reproductive hormonesReproductive Biology and Fertility

Insulin modulation of luteinizing hormone secretion in normal female volunteers and lean polycystic ovary syndrome patients

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Moret, Mallory, Stettler, Rodrigue, Rodieux, Frederique, Gaillard, Rolf C., Waeber, Gérard, Wirthner, Daniel, Giusti, Vittorio, Tappy, Luc +1 more·2009·Neuroendocrinology

Abstract

Background/Aims: Endocrine features of polycystic ovary syndrome (PCOS) include altered ovarian steroidogenesis, hyperinsulinemia and abnormal luteinizing hormone (LH) secretion. This study was undertaken to further evaluate the role of insulin to modulate LH secretion in lean PCOS patients with normal insulin sensitivity and normal volunteers. Methods: The study was performed in five nonobese patients diagnosed with PCOS on the basis of amenorrhea and a polycystic morphology at ovarian ultrasound, and 5 normal controls in early to mid-follicular phase and matched for weight and age. All subjects were phenotyped, and then admitted for 12 h of frequent (q 10’) blood sampling on two separate occasions, once for a baseline study and the other time for a hyperinsulinemic and euglycemic clamp study. LH was measured in samples obtained throughout each admission in order to perform LH pulse analysis. Results: Baseline LH secretion in PCOS subjects was significantly different from controls: they had higher LH levels, higher LH/FSH ratios as well as a faster LH pulse frequency than normal women. Insulin administration did not affect the pattern of LH secretion of PCOS patients, whereas it significantly increased the LH pulse frequency while decreasing the LH interpulse intervals in the controls. Conclusions: These data confirm that an abnormal pattern of LH secretion characteristic of PCOS can be observed in lean patients, and appears independent of peripheral insulin levels. Furthermore, our results in lean controls provide the first direct evidence that peripheral insulin can modulate the activity of hypothalamic gonadotropin-releasing hormone (GnRH) neurons in the human.

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Crossref · 10.1159/000160911

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  • Studies have suggested that insulin acts on the hypothalamic-pituitary-gonadal axis at the level of the hypothalamus to directly or indirectly modulate GnRH secretion (possibly via kisspeptin), as well as at the level of the pituitary gonadotrope.

    “Studies have suggested that insulin acts on the hypothalamic-pituitary-gonadal axis at the level of the hypothalamus to directly or indirectly modulate GnRH secretion (possibly via kisspeptin), as well as at the level of the pituitary gonadotrope.105”

    From Pubertal development and regulation (2016) · cites this paper as [105]

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Authors
Moret, M., Stettler, R., Rodieux, F., Gaillard, R. C., Waeber, G., Wirthner, D., Giusti, V., Tappy, L., & Pralong, F. P.
Affiliations
  • Centre Hospitalier Universitaire Vaudois (CH)
  • University of Lausanne (CH)
  • Centre for Medically Assisted Procreation (CH)
Venue
Neuroendocrinology
Publisher
S. Karger AG
Published
2008-10-02
Volume
89
Issue
2
Pages
131-139
ISSN
  • 0028-3835 (ISSN-L)
  • 1423-0194
OpenAlex
W1992916596
Cited by
72
References
26
Citations by year
2026: 2 · 2025: 4 · 2024: 4 · 2023: 5 · 2022: 4 · 2021: 4 · 2020: 2 · 2019: 4 · 2018: 2 · 2017: 6 · 2016: 6 · 2015: 2 · 2014: 5 · 2013: 9 · 2012: 4
FWCI
3.48
Type
journal article
Language
en
Open access
Locations
  • Neuroendocrinology (publishedVersion)
  • PubMed (publishedVersion)
  • Archive ouverte UNIGE (University of Geneva) (submittedVersion, cc-by)
  • IRIS (submittedVersion)
  • SERVAL (Université de Lausanne) (submittedVersion)
Funders
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung
Topics
  • Health Sciences › Medicine › Reproductive Medicine › Ovarian function and disorders
  • Health Sciences › Medicine › Reproductive Medicine › Hypothalamic control of reproductive hormones
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Reproductive Biology and Fertility
Keywords
polycystic ovary syndrome, luteinizing hormone secretion, insulin, LH pulse frequency, LH/FSH ratio, GnRH neurons, hyperinsulinemic-euglycemic clamp
MeSH terms
Adult, Female, Humans, Hypothalamus, Insulin, Luteinizing Hormone, Gonadotropin-Releasing Hormone, Polycystic Ovary Syndrome, Thinness, Glucose Clamp Technique

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