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Nesfatin-1 in the Lateral Parabrachial Nucleus Inhibits Food Intake, Modulates
Excitability of Glucosensing Neurons, and Enhances UCP1 Expression in Brown
Adipose Tissue
#MMPMID28484396
Yuan JH
; Chen X
; Dong J
; Zhang D
; Song K
; Zhang Y
; Wu GB
; Hu XH
; Jiang ZY
; Chen P
Front Physiol
2017[]; 8
(?): 235
PMID28484396
show ga
Nesfatin-1, an 82-amino acid neuropeptide, has been shown to induce anorexia and
energy expenditure. Food intake is decreased in ad libitum-fed rats following
injections of nesfatin-1 into the lateral, third, or fourth ventricles of the
brain. Although the lateral parabrachial nucleus (LPBN) is a key regulator of
feeding behavior and thermogenesis, the role of nesfatin-1 in this structure has
not yet been delineated. We found that intra-LPBN microinjections of nesfatin-1
significantly reduced nocturnal cumulative food intake and average meal sizes
without affecting meal numbers in rats. Because glucose sensitive neurons are
involved in glucoprivic feeding and glucose homeostasis, we examined the effect
of nesfatin-1 on the excitability of LPBN glucosensing neurons. In vivo
electrophysiological recordings from LPBN glucose sensitive neurons showed that
nesfatin-1 (1.5 × 10(-8) M) excited most of the glucose-inhibited neurons.
Chronic administration of nesfatin-1 into the LPBN of rats reduced body weight
gain and enhanced the expression of uncoupling protein 1 (UCP1) in brown adipose
tissue (BAT) over a 10-day period. Furthermore, the effects of nesfatin-1 on food
intake, body weight, and BAT were attenuated by treatment with the melanocortin
antagonist SHU9119. These results demonstrate that nesfatin-1 in LPBN inhibited
food intake, modulated excitability of glucosensing neurons and enhanced UCP1
expression in BAT via the melanocortin system.