STAT3 signalling is required for leptin regulation of energy balance but not reproduction (original) (raw)
- Letter
- Published: 20 February 2003
- Walter H. Stearns1,
- Trevor A. Dundon1,
- Markus Schubert1,
- Annette W. K. Tso1,
- Yongping Wang2,
- Alexander S. Banks1,
- Hugh J. Lavery1,
- Asma K. Haq1,
- Eleftheria Maratos-Flier1,
- Benjamin G. Neel2,
- Michael W. Schwartz3 &
- …
- Martin G. Myers Jr1
Nature volume 421, pages 856–859 (2003)Cite this article
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Abstract
Secretion of leptin from adipocytes communicates body energy status to the brain by activating the leptin receptor long form (LRb). LRb regulates energy homeostasis and neuroendocrine function; the absence of LRb in db/db mice results in obesity, impaired growth, infertility and diabetes1,2,3,4. Tyr 1138 of LRb mediates activation of the transcription factor STAT3 during leptin action5,6,7,8. To investigate the contribution of STAT3 signalling to leptin action in vivo, we replaced the gene encoding the leptin receptor (lepr) in mice with an allele coding for a replacement of Tyr 1138 in LRb with a serine residue (_lepr_S1138) that specifically disrupts the LRb–STAT3 signal. Here we show that, like db/db mice, _lepr_S1138 homozygotes (s/s) are hyperphagic and obese. However, whereas db/db mice are infertile, short and diabetic, s/s mice are fertile, long and less hyperglycaemic. Furthermore, hypothalamic expression of neuropeptide Y (NPY) is elevated in db/db mice but not s/s mice, whereas the hypothalamic melanocortin system is suppressed in both db/db and s/s mice. LRb–STAT3 signalling thus mediates the effects of leptin on melanocortin production and body energy homeostasis, whereas distinct LRb signals regulate NPY and the control of fertility, growth and glucose homeostasis.
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Acknowledgements
We thank G. Leiberman, D. Trombly and M. Seifert for assistance. This work was supported by grants from the NIH (to M.G.M. and M.W.S.), and an ADA/EASD Transatlantic Fellowship (to S.H.B.).
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Authors and Affiliations
- Research Division, Joslin Diabetes Center, 1 Joslin Place, Boston, Massachusetts, 02215, USA
Sarah H. Bates, Walter H. Stearns, Trevor A. Dundon, Markus Schubert, Annette W. K. Tso, Alexander S. Banks, Hugh J. Lavery, Asma K. Haq, Eleftheria Maratos-Flier & Martin G. Myers Jr - Cancer Biology Program, Beth Israel Deaconess Medical Center and Harvard Medical School, 1 Joslin Place, Boston, Massachusetts, 02215, USA
Yongping Wang & Benjamin G. Neel - Harborview Medical Center, University of Washington, Seattle, Washington, 98122, USA
Michael W. Schwartz
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Correspondence toMartin G. Myers Jr.
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Bates, S., Stearns, W., Dundon, T. et al. STAT3 signalling is required for leptin regulation of energy balance but not reproduction.Nature 421, 856–859 (2003). https://doi.org/10.1038/nature01388
- Received: 20 November 2002
- Accepted: 10 December 2002
- Issue Date: 20 February 2003
- DOI: https://doi.org/10.1038/nature01388