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Neuroanatomy of body weight control: lessons learned from leptin
Diana L. Williams, Michael W. Schwartz
Diana L. Williams, Michael W. Schwartz
Published May 23, 2011
Citation Information: J Clin Invest. 2011;121(6):2152-2155. https://doi.org/10.1172/JCI58027.
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Commentary

Neuroanatomy of body weight control: lessons learned from leptin

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Abstract

Rather than arising from the passive accumulation of excess calories, obesity is a state in which the biologically defended level of body fat stores increases due to defects in the homeostatic process that matches food intake and energy expenditure over time. By deleting leptin receptors from distinct brain regions and neuronal subsets, researchers are beginning to identify the neuroanatomical substrates responsible for this regulation. In this issue of the JCI, Scott et al. demonstrate that loss of leptin receptors in a subset of hindbrain neurons increases food intake in mice, but, unlike what is observed when leptin receptors are deleted from hypothalamic neurons, these mice compensate by increasing energy expenditure and hence do not become obese. Although many brain areas can regulate energy intake and/or energy expenditure, it is likely that only a small subset of neurons actively matches the two over time. It is vital to clarify how this works if we are to improve our understanding of obesity pathogenesis and options available for its treatment.

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Diana L. Williams, Michael W. Schwartz

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