Cited by 183Regulation of Appetite and ObesityAdipokines, Inflammation, and Metabolic DiseasesHypothalamic control of reproductive hormones

Mice lacking inhibitory leptin receptor signals are lean with normal endocrine function

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Björnholm, Marie, Münzberg, Heike, Leshan, Rebecca L., Villanueva, Eneida C., Bates, Sarah H., Louis, Gwendolyn W., Jones, Justin C., Ishida-Takahashi, Ryoko +2 more·2007·Journal of Clinical Investigation

Abstract

The adipose-derived hormone, leptin, acts via its receptor (LRb) to convey the status of body energy stores to the brain, decreasing feeding and potentiating neuroendocrine energy expenditure. The failure of high levels of leptin in most obese individuals to promote weight loss defines a state of diminished responsiveness to increased leptin, termed leptin resistance. Leptin stimulates the phosphorylation of several tyrosine residues on LRb to mediate leptin action. We homologously replaced LRb in mice with a receptor with a mutation in one of these sites (Tyr985) in order to examine its role in leptin action and signal attenuation in vivo. Mice homozygous for this mutation are neuroendocrinologically normal, but females demonstrate decreased feeding, decreased expression of orexigenic neuropeptides, protection from high-fat diet-induced obesity, and increased leptin sensitivity in a sex-biased manner. Thus, leptin activates autoinhibitory signals via LRb Tyr985 to attenuate the anti-adiposity effects of leptin, especially in females, potentially contributing to leptin insensitivity in obesity.

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Crossref · 10.1172/jci30688

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  • Tyr985 attenuates leptin action in vivo, presumably by serving as the SOCS-3 binding site.

    “These results support data from cultured cells (22) suggesting that Tyr985 attenuates leptin action in vivo, presumably by serving as the SOCS-3 binding site (24).”
  • Mice with LepRb Tyr985 mutation (l/l) have a lean phenotype characterized by reduced food intake and adiposity and increased leptin sensitivity.

    “mutation of Tyr985 in these (l/l) mice resulted in a lean phenotype characterized by reduced food intake and adiposity, and increased leptin sensitivity (24).”
  • Mutation of LRb Tyr985 prevents SOCS-3 action on the leptin receptor and results in mice that display increased leptin sensitivity, are lean, and are resistant to diet-induced obesity.

    “mutation of LRb Tyr985 prevents SOCS-3 action on the leptin receptor and thereby results in mice which display increased leptin sensitivity, are lean and are resistant to DIO (24).”

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Authors
Björnholm, M., Münzberg, H., Leshan, R. L., Villanueva, E. C., Bates, S. H., Louis, G. W., Jones, J. C., Ishida-Takahashi, R., Bjørbaek, C., & Myers, M. G.
Affiliations
University of Michigan (US)
Corresponding author
Myers, Martin G.
Venue
Journal of Clinical Investigation
Published
2007-05-01
Volume
117
Issue
5
Pages
1354-1360
ISSN
0021-9738 (ISSN-L)
OpenAlex
W2109717216
Cited by
183
References
48
Citations by year
2026: 2 · 2025: 3 · 2024: 6 · 2023: 3 · 2021: 3 · 2020: 11 · 2019: 7 · 2018: 8 · 2017: 13 · 2016: 3 · 2015: 8 · 2014: 17 · 2013: 16 · 2012: 17
FWCI
7.08
Type
journal article
Language
en
Open access
Locations
  • Journal of Clinical Investigation (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Svenska Sällskapet för Medicinsk Forskning
  • National Institutes of Health
  • National Institute of Diabetes and Digestive and Kidney Diseases (DK56731, R37DK056731, DK 57768, R01DK057768, R01DK056731)
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, leptin receptor, leptin resistance, obesity, high-fat diet-induced obesity, feeding behavior, orexigenic peptides, sex differences, neuroendocrine regulation, energy homeostasis
MeSH terms
Animals, Endocrine System, Female, Male, Mice, Inbred C57BL, Obesity, Receptors, Cell Surface, Sensitivity and Specificity, Sex Factors, Thinness, Tyrosine, Signal Transduction, Amino Acid Substitution, Leptin, Mice, Receptors, Leptin

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