Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/107113
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Type: Journal article
Title: Effects of leptin deficiency and replacement on cerebellar response to food-related cues
Author: Berman, S.
Paz-Filho, G.
Wong, M.
Kohno, M.
Licinio, J.
London, E.
Citation: Cerebellum, 2013; 12(1):59-67
Publisher: Springer
Issue Date: 2013
ISSN: 1473-4222
1473-4230
Statement of
Responsibility: 
Steven M. Berman, Gilberto Paz-Filho, Ma-Li Wong, Milky Kohno, Julio Licinio, Edythe D. London
Abstract: Leptin affects eating behavior partly by altering the response of the brain to food-related stimuli. The effects of leptin on brain structure have been observed in the cerebellum, where leptin receptors are most densely expressed, but the function of leptin in the cerebellum remains unclear. We performed a nonrandomized, prospective interventional study of three adults with genetically mediated leptin deficiency. FMRI was recorded three times each year during years 5 and 6 of leptin replacement treatment. Session 1 of each year occurred after 10 months of continuous daily replacement, session 2 after 33-37 days without leptin, and session 3 at 14-23 days after daily replacement was restored. Statistical parametric mapping software (SPM5) was employed to contrast the fMRI blood oxygenation level-dependent response to images of high-calorie foods versus images of brick walls. Covariate analyses quantified the effects of the duration of leptin replacement and concomitant changes in body mass on the cerebral responses. Longer duration of replacement was associated with more activation by food images in a ventral portion of the posterior lobe of the cerebellum, while simultaneous decreases in body mass were associated with decreased activation in a more dorsal portion of the same lobe. These findings indicate that leptin replacement reversibly alters neural function within the posterior cerebellum and modulates plasticity-dependent brain physiology in response to food cues. The results suggest an underexplored role for the posterior cerebellum in the regulation of leptin-mediated processes related to food intake.
Keywords: Obesity; leptin; fMRI; plasticity
Rights: © Springer Science+Business Media, LLC 2012
RMID: 0030048371
DOI: 10.1007/s12311-012-0360-z
Appears in Collections:Molecular and Biomedical Science publications

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