GM-CSF action in the CNS decreases food intake and body weight
Jacquelyn A. Reed, … , Lara S. Picard, Randy J. Seeley
Jacquelyn A. Reed, … , Lara S. Picard, Randy J. Seeley
Published November 1, 2005
Citation Information: J Clin Invest. 2005;115(11):3035-3044. https://doi.org/10.1172/JCI25681.
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Research Article Metabolism

GM-CSF action in the CNS decreases food intake and body weight

Abstract

Many proinflammatory cytokines, such as leptin, play key roles in dynamic regulation of energy expenditure and food intake. The present work tested a role for the proinflammatory cytokine GM-CSF. Central but not peripheral administration of GM-CSF to adult rats significantly decreased food intake and body weight for at least 48 hours. Similar results were observed following central administration of GM-CSF in mice. GM-CSF receptor immunoreactivity was found on neurons within the paraventricular and arcuate nuclei of the hypothalamus. GM-CSF–deficient (GM–/–) mice weighed more and had significantly higher total body fat than wild-type (GM+/+) mice. Energy expenditure in GM–/– mice was decreased compared with that in GM+/+ mice. Taken together, these findings demonstrate that GM-CSF signaling in the CNS can regulate energy homeostasis.

Authors

Jacquelyn A. Reed, Deborah J. Clegg, Kathleen Blake Smith, Emeline G. Tolod-Richer, Emily K. Matter, Lara S. Picard, Randy J. Seeley

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Plasma leptin and hypothalamic AgRP and NPY expression were decreased fo...
Plasma leptin and hypothalamic AgRP and NPY expression were decreased following GM-CSF treatment. (A) Rats were given i3vt injections of vehicle or GM-CSF and then fed, fasted (Fast), or pair-fed (Prfed) for 24 hours. In fed rats, GM-CSF treatment decreased leptin levels compared with vehicle treatment. Fasted groups did not differ despite treatment and were similar to a pair-fed group. *P < 0.05; n = 7–9; mean ± SEM. (B) AgRP and NPY expression in hypothalamus was decreased in fasted rats killed after receiving 2 daily injections of GM-CSF. *P < 0.05; n = 5–7; mean ± SEM.