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2016 ; 6
(ä): 33500
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SCOP/PHLPP1? in the basolateral amygdala regulates circadian expression of mouse
anxiety-like behavior
#MMPMID27640726
Nakano JJ
; Shimizu K
; Shimba S
; Fukada Y
Sci Rep
2016[Sep]; 6
(ä): 33500
PMID27640726
show ga
While disruption of the circadian clock triggers a spectrum of affective
abnormalities, how the clock regulates mammalian emotionality remains unclear.
Here, we characterized the time-of-day-dependent regulation of mouse anxiety-like
behaviors. We show that anxiety-like behaviors are expressed in a circadian
manner in mice and demonstrate that the clock machineries in the dorsal
telencephalon (dTel) are required for the time-of-day-dependent regulation of
anxiety-like behaviors. We identify suprachiasmatic nucleus circadian oscillatory
protein (SCOP/PHLPP1?) as an essential intracellular signaling molecule mediating
this temporal regulation downstream of the clock. Using viral-mediated,
basolateral amygdala (BLA)-specific knockout of Scop, we demonstrate that
deletion of SCOP in the BLA exerts anxiolytic effects on the elevated plus maze
at early subjective night, thereby blunting the circadian variation in the
anxiety-like behavior. We conclude that the circadian expression of SCOP in the
BLA plays a key role in generating circadian rhythmicity in the anxiety-like
behavior. Our results demonstrate SCOP as a regulator of anxiety-like behaviors
and reveal its key roles in the anxiogenic functions of the BLA.