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2017 ; 7
(ä): 45819
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English Wikipedia
Fibroblast growth factor 21, assisted by elevated glucose, activates
paraventricular nucleus NUCB2/Nesfatin-1 neurons to produce satiety under fed
states
#MMPMID28374855
Santoso P
; Nakata M
; Shiizaki K
; Boyang Z
; Parmila K
; Otgon-Uul Z
; Hashimoto K
; Satoh T
; Mori M
; Kuro-O M
; Yada T
Sci Rep
2017[Apr]; 7
(ä): 45819
PMID28374855
show ga
Fibroblast growth factor 21 (FGF21), liver-derived hormone, exerts diverse
metabolic effects, being considered for clinical application to treat obesity and
diabetes. However, its anorexigenic effect is debatable and whether it involves
the central mechanism remains unclarified. Moreover, the neuron mediating FGF21's
anorexigenic effect and the systemic energy state supporting it are unclear. We
explored the target neuron and fed/fasted state dependence of FGF21's
anorexigenic action. Intracerebroventricular (ICV) injection of FGF21 markedly
suppressed food intake in fed mice with elevated blood glucose. FGF21 induced
c-Fos expression preferentially in hypothalamic paraventricular nucleus (PVN),
and increased mRNA expression selectively for nucleobindin 2/nesfatin-1
(NUCB2/Nesf-1). FGF21 at elevated glucose increased [Ca(2+)](i) in PVN
NUCB2/Nesf-1 neurons. FGF21 failed to suppress food intake in PVN-preferential
Sim1-Nucb2-KO mice. These findings reveal that FGF21, assisted by elevated
glucose, activates PVN NUCB2/Nesf-1 neurons to suppress feeding under fed states,
serving as the glycemia-monitoring messenger of liver-hypothalamic network for
integrative regulation of energy and glucose metabolism.