Cited by 552Regulation of Appetite and ObesityAdipokines, Inflammation, and Metabolic DiseasesHypothalamic control of reproductive hormones

Diet-Induced Obesity Causes Severe but Reversible Leptin Resistance in Arcuate Melanocortin Neurons

Open access
Enriori, Pablo J., Evans, Anne E., Sinnayah, Puspha, Jobst, Erin E., Tonelli-Lemos, Luciana, Billes, Sonja K., Glavas, Maria M., Grayson, Bernadette E. +4 more·2007·Cell Metabolism

Abstract

Despite high leptin levels, most obese humans and rodents lack responsiveness to its appetite-suppressing effects. We demonstrate that leptin modulates NPY/AgRP and alpha-MSH secretion from the ARH of lean mice. High-fat diet-induced obese (DIO) mice have normal ObRb levels and increased SOCS-3 levels, but leptin fails to modulate peptide secretion and any element of the leptin signaling cascade. Despite this leptin resistance, the melanocortin system downstream of the ARH in DIO mice is over-responsive to melanocortin agonists, probably due to upregulation of MC4R. Lastly, we show that by decreasing the fat content of the mouse's diet, leptin responsiveness of NPY/AgRP and POMC neurons recovered simultaneously, with mice regaining normal leptin sensitivity and glycemic control. These results highlight the physiological importance of leptin sensing in the melanocortin circuits and show that their loss of leptin sensing likely contributes to the pathology of leptin resistance.

Integrity signals

Registry

Crossref · 10.1016/j.cmet.2007.02.004

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  • In one study, only about half of male C57/BL6J mice became obese on a palatable high-fat diet, but reward functions were not assessed.

    “In one such study, only about half of male C57/BL6J mice became obese on a palatable high-fat diet ([55](#B55)), but reward functions were not assessed.”

    From Food reward, hyperphagia, and obesity (2011) · cites this paper as [55]

  • The ability of leptin to activate pSTAT3 is impaired in rodent models of diet-induced obesity, specifically in the hypothalamic arcuate nucleus.

    “the ability of leptin to activate pSTAT3, a marker of leptin signaling (49), is impaired in rodent models of DIO, specifically in the hypothalamic ARC (56, 124).”

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Authors
Enriori, P. J., Evans, A. E., Sinnayah, P., Jobst, E. E., Tonelli-Lemos, L., Billes, S. K., Glavas, M. M., Grayson, B. E., Perello, M., Nillni, E. A., Grove, K. L., & Cowley, M. A.
Affiliations
  • Oregon National Primate Research Center (US)
  • Brown University (US)
Corresponding author
Cowley, Michael A.
Venue
Cell Metabolism
Publisher
Elsevier BV
Published
2007-03
Volume
5
Issue
3
Pages
181-194
ISSN
1550-4131 (ISSN-L)
OpenAlex
W2169342042
Cited by
552
References
54
Citations by year
2026: 9 · 2025: 18 · 2024: 7 · 2023: 20 · 2022: 28 · 2021: 32 · 2020: 34 · 2019: 27 · 2018: 33 · 2017: 30 · 2016: 28 · 2015: 36 · 2014: 48 · 2013: 34 · 2012: 39
FWCI
12.64
Type
journal article
Language
en
Open access
Locations
  • Cell Metabolism (publishedVersion)
  • PubMed (publishedVersion)
  • Victoria University Research Repository (Victoria University) (submittedVersion)
Funders
  • National Institute of Neurological Disorders and Stroke (DK 62202, RR 0163, R01 NS 045231, DK 60685 NIH RR 0163)
  • National Institute of Diabetes and Digestive and Kidney Diseases (R01 DK 58148)
Topics
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Regulation of Appetite and Obesity
  • Health Sciences › Medicine › Epidemiology › Adipokines, Inflammation, and Metabolic Diseases
  • Health Sciences › Medicine › Reproductive Medicine › Hypothalamic control of reproductive hormones
Keywords
leptin resistance, diet-induced obesity, arcuate nucleus, melanocortin system, NPY/AgRP neurons, POMC neurons, alpha-melanocyte-stimulating hormone, SOCS3, melanocortin-4 receptor, leptin signaling, high-fat diet, obesity reversal, appetite regulation, glycemic control
MeSH terms
alpha-MSH, Animals, Arcuate Nucleus of Hypothalamus, Body Composition, Diet, Dietary Fats, Dose-Response Relationship, Drug, Gene Expression Regulation, Hypothalamus, Male, Mice, Inbred C57BL, Neurons, Neuropeptide Y, Obesity, Pro-Opiomelanocortin, RNA, Messenger, Signal Transduction, Weight Loss, Leptin, Intercellular Signaling Peptides and Proteins, Mice, Melanocortins, Agouti-Related Protein, In Vitro Techniques

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