Cited by 47Regulation of Appetite and ObesityHypothalamic control of reproductive hormonesEating Disorders and Behaviors

Estradiol‐Induced Anorexia Is Independent of Leptin and Melanin‐Concentrating Hormone

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Tritos, Nicholas A., Segal‐Lieberman, Gabriella, Vezeridis, Peter S., Maratos‐Flier, Eleftheria·2004·Obesity Research

Abstract

Objective: Treatment of male rodents with estradiol (E 2) is associated with anorexia and weight loss by poorly understood mechanisms. We examined the role of the orexigenic hypothalamic peptide melanin‐concentrating hormone (MCH) and the appetite‐inhibiting, fat‐derived hormone leptin in mediating E 2‐induced anorexia. Research Methods and Procedures: We studied the effect of E 2 treatment (implantation of either E 2 pellet or matching placebo) in male C57Bl/6J mice, as well as in a lean mouse model (MCH knockout mice) and an obese model (leptin‐deficient ob/ob mice). We also studied the effect of E 2 treatment in the context of high‐fat diet. Results: We confirmed E 2 dose‐dependent anorexia in male wild type mice fed a normal chow diet. E 2 treatment was associated with a significant decrease in body fat, serum leptin levels, and arcuate hypothalamic proopiomelanocortin expression. E 2‐implanted mice also showed increased hypothalamic neuropeptide Y and MCH expression. As MCH has been implicated in E 2‐induced hypophagia, we performed E 2 pellet implantation in MCH knockout mice and observed hypophagia and weight loss, indicating that MCH is not an essential mediator of E 2‐induced anorexia. E 2‐implanted ob/ob mice also had hypophagia and weight loss, indicating that leptin is not essential for E 2‐induced anorexia. High‐fat diet significantly exacerbated the effect of E 2 treatment, leading to a 99.6% decrease in food intake at 48 hours and a 30% loss of body weight within 1 week. Discussion: The anorectic effects of E 2 were independent of MCH and leptin. Our results suggested that E 2 may have effects on nutrient preferences.

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  1. Wade GN. Sex steroids and energy balance: sites and mech- anisms of action. Ann N Y Acad Sci. 1986;474:389 -99.
  2. Elias CF, Saper CB, Maratos-Flier E, et al. Chemically defined projections linking the mediobasal hypothalamus and the lateral hypothalamic area. J Comp Neurol. 1998;402:442- 59.

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Authors
Tritos, N. A., Segal‐Lieberman, G., Vezeridis, P. S., & Maratos‐Flier, E.
Affiliations
Joslin Diabetes Center (US)
Venue
Obesity Research
Publisher
Wiley
Published
2004-04
Volume
12
Issue
4
Pages
716-724
ISSN
  • 1071-7323 (ISSN-L)
  • 1550-8528
OpenAlex
W1998870692
Cited by
47
References
50
Citations by year
2024: 1 · 2023: 2 · 2022: 2 · 2021: 1 · 2020: 1 · 2019: 1 · 2018: 3 · 2017: 3 · 2016: 2 · 2015: 2 · 2014: 5 · 2013: 1 · 2012: 2
FWCI
1.27
Type
journal article
Language
en
Open access
Locations
  • Obesity Research (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (1r01dk053978-01, DK46200)
  • National Institute of Diabetes and Digestive and Kidney Diseases (P01DK56116, R01DK056113, P01DK056116, 5R01DK56113, P30DK046200, 5R01DK53978, P30 DK-46200)
Topics
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Regulation of Appetite and Obesity
  • Health Sciences › Medicine › Reproductive Medicine › Hypothalamic control of reproductive hormones
  • Social Sciences › Psychology › Clinical Psychology › Eating Disorders and Behaviors
Keywords
estradiol, anorexia, hypophagia, melanin-concentrating hormone, leptin, hypothalamic neuropeptides, proopiomelanocortin, neuropeptide Y, weight loss, high-fat diet, ob/ob mice, sex differences
MeSH terms
Animals, Anorexia, Dietary Fats, Dose-Response Relationship, Drug, Drug Implants, Estradiol, Hypothalamic Hormones, Male, Melanins, Mice, Inbred C57BL, Mice, Obese, Pituitary Hormones, Mice, Knockout, Leptin, Mice

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