Abstract：
:Body weight (BW) is regulated in age-dependent manner; it continues to increase during growth period, and reaches a plateau once reaching adulthood. However, its underlying mechanism remains unknown. Regarding such mechanisms in the brain, we here report that neural circuits from the hypothalamus (paraventricular nucleus: PVN) to the brainstem (dorsal vagal complex: DVC) suppress late-onset BW gain without affecting food intake. The genetic suppression of the PVN-DVC circuit induced BW increase only in aged rats, indicating that this circuit contributes to suppress the BW at a fixed level after reaching adulthood. PVN neurons in the hypothalamus were inactive in younger rats but active in aged rats. The density of neuropeptide Y (NPY) terminal/fiber is reduced in the aged rat PVN area. The differences in neuronal activity, including oxytocin neurons in the PVN, were affected by the application of NPY or its receptor inhibitor, indicating that NPY is a possible regulator of this pathway. Our data provide new insights into understanding age-dependent BW regulation.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Maejima Y,Kato S,Horita S,Ueta Y,Takenoshita S,Kobayashi K,Shimomura Kdoi
10.1038/s41598-019-54870-zsubject
Has Abstractpub_date
2019-12-04 00:00:00pages
18360issue
1issn
2045-2322pii
10.1038/s41598-019-54870-zjournal_volume
9pub_type
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