Abstract：
:The neurobiology underlying obesity is not fully understood. The neurotransmitter serotonin (5-HT) is established as a satiety-generating signal, but its rewarding role in feeding is less well elucidated. From animal experiments there is now evidence that the 5-HT(4) receptor (5-HT(4)R) is involved in food intake, and that pharmacological or genetic manipulation of the receptor in reward-related brain areas alters food intake. Here, we used positron emission tomography in humans to examine the association between cerebral 5-HT(4)Rs and common obesity. We found in humans a strong positive association between body mass index and the 5-HT(4)R density bilaterally in the two reward ‘hot spots’ nucleus accumbens and ventral pallidum, and additionally in the left hippocampal region and orbitofrontal cortex. These findings suggest that the 5-HT(4)R is critically involved in reward circuits that regulate people's food intake. They also suggest that pharmacological stimulation of the cerebral 5-HT(4)R may reduce reward-related overeating in humans.
journal_name
Neuroimagejournal_title
NeuroImageauthors
Haahr ME,Rasmussen PM,Madsen K,Marner L,Ratner C,Gillings N,Baaré WF,Knudsen GMdoi
10.1016/j.neuroimage.2012.03.050subject
Has Abstractpub_date
2012-07-16 00:00:00pages
884-8issue
4eissn
1053-8119issn
1095-9572pii
S1053-8119(12)00331-Xjournal_volume
61pub_type
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