Postprandial plasma PYY concentrations are associated with increased regional gray matter volume and rCBF declines in caudate nuclei — A combined MRI and H215O PET study

The anorexigenic gastrointestinal hormone Peptide YY plays an important role in the communication between the gastrointestinal tract and the central nervous system. PYY has been shown to modulate brain activity in regions implicated in reward and food related behavior. Its effects on brain structure...

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Bibliographic Details
Published in:NeuroImage (Orlando, Fla.) Fla.), 2012-03, Vol.60 (1), p.592-600
Main Authors: Weise, Christopher M., Thiyyagura, Pradeep, Reiman, Eric M., Chen, Kewei, Krakoff, Jonathan
Format: Article
Language:English
Subjects:
Behavior
Body fat
Brain
Brain research
Caudate nucleus
Diabetes
Food
Gastrointestinal surgery
Gray matter
MRI
Obesity
PET
Plasma
PYY
rCBF
Rodents
Striatum
Studies
VBM
Weight control
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Summary:The anorexigenic gastrointestinal hormone Peptide YY plays an important role in the communication between the gastrointestinal tract and the central nervous system. PYY has been shown to modulate brain activity in regions implicated in reward and food related behavior. Its effects on brain structure however, remain unknown. Voxel-based morphometry was used to investigate the relationship between fasting and postprandial plasma PYY concentrations and regional gray matter volume (GMV). For this analysis twenty adult, non diabetic Caucasians were included (18F/2M, age 31±9y, percentage of body fat [PFAT] 32±8%) who had volumetric brain magnetic resonance images and underwent H215O positron emission tomographic (PET) measurements of regional cerebral blood flow (rCBF), a marker of local neuronal activity, and measurements of plasma total PYY, prior to (fasting) and following a satiating liquid meal. Voxel-wise analysis revealed a regional positive association between postprandial PYY and gray matter volume bilaterally in the caudate nuclei. These associations remained significant (p
ISSN:1053-8119
1095-9572
DOI:10.1016/j.neuroimage.2011.12.023