Cited by 60Hypothalamic control of reproductive hormonesRegulation of Appetite and ObesityReproductive Biology and Fertility

Effects of ovariectomy on the neuroendocrine axes regulating reproduction and energy balance in young cynomolgus macaques

Sandoval‐Guzmán, T., Stalcup, S. T., Krajewski, S. J., Voytko, M. L., Rance, N. E.·2004·Journal of Neuroendocrinology

Abstract

Degeneration of the ovary in middle-aged women results in castrate levels of ovarian steroids and increased gonadotropin secretion from the anterior pituitary gland. Ageing in women is also accompanied by significant changes in energy homeostasis. We have observed alterations in hypothalamic morphology and gene expression in older women, including hypertrophy and increased gene expression of neurokinin B (NKB) neurones, elevated levels of gonadotropin releasing-hormone (GnRH) mRNA and decreased numbers of neurones expressing pro-opiomelanocortin (POMC) mRNA. To determine if loss of ovarian steroids could produce comparable changes in gene expression in young primates, we measured the effects of ovariectomy on NKB, GnRH and POMC gene expression in young cynomolgus monkeys. We also measured serum leptin and body weight to examine the consequences of ovariectomy on energy balance. NKB neurones in the infundibular nucleus of ovariectomized monkeys were larger, more numerous and displayed increased levels of NKB mRNA compared to those of intact controls. Moreover, ovariectomy increased the number of neurones expressing GnRH gene transcripts and elevated serum luteinizing hormone. By contrast, several parameters related to energy balance, including POMC gene expression, serum leptin and body weights, were unchanged by ovariectomy. Thus, the rise in NKB and GnRH gene expression in older women was simulated by ovariectomy in monkeys, but the changes in POMC gene expression and energy balance were not. This study provides strong support for the hypothesis that ovarian failure contributes to the increased NKB and GnRH gene expression observed in postmenopausal women.

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Crossref · 10.1111/j.0953-8194.2004.01143.x

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Authors
Sandoval‐Guzmán, T., Stalcup, S. T., Krajewski, S. J., Voytko, M. L., & Rance, N. E.
Affiliations
  • University of Arizona (US)
  • Wake Forest University Health Sciences (US)
Corresponding author
Rance, N. E.
Venue
Journal of Neuroendocrinology
Publisher
Wiley
Published
2004-02
Volume
16
Issue
2
Pages
146-153
ISSN
  • 0953-8194 (ISSN-L)
  • 1365-2826
OpenAlex
W2055613172
Cited by
60
References
60
Citations by year
2025: 2 · 2024: 1 · 2023: 2 · 2022: 3 · 2021: 1 · 2020: 2 · 2019: 1 · 2018: 6 · 2017: 2 · 2016: 2 · 2015: 4 · 2014: 5 · 2013: 1 · 2012: 6
FWCI
2.60
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Neuroendocrinology (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Oregon National Primate Research Center
  • Wake Forest School of Medicine
  • National Institute on Aging (AG09214)
  • NIH Clinical Center
Topics
  • Health Sciences › Medicine › Reproductive Medicine › Hypothalamic control of reproductive hormones
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Regulation of Appetite and Obesity
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Reproductive Biology and Fertility
Keywords
ovariectomy, ovarian failure, neurokinin B, gonadotropin-releasing hormone, proopiomelanocortin, hypothalamic gene expression, arcuate nucleus, luteinizing hormone, leptin, energy balance, reproductive axis, postmenopausal women, Macaca fascicularis
MeSH terms
Animals, Arcuate Nucleus of Hypothalamus, Body Weight, Disease Models, Animal, Energy Metabolism, Female, Gene Expression Regulation, Hypertrophy, Gonadotropin-Releasing Hormone, Macaca fascicularis, Menopause, Neurons, Neurosecretory Systems, Ovariectomy, Ovary, Pro-Opiomelanocortin, Random Allocation, RNA, Messenger, Neurokinin B, Leptin

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