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Deprecated: Implicit conversion from float 243.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Proc+Natl+Acad+Sci+U+S+A 2016 ; 113 (10): 2732-7 Nephropedia Template TP
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Rhythmic expression of cryptochrome induces the circadian clock of arrhythmic suprachiasmatic nuclei through arginine vasopressin signaling #MMPMID26903624
Edwards MD; Brancaccio M; Chesham JE; Maywood ES; Hastings MH
Proc Natl Acad Sci U S A 2016[Mar]; 113 (10): 2732-7 PMID26903624show ga
Daily cycles of behavior adapt us to the 24-h rhythm of day and night. These rhythms are coordinated by a central clock, the suprachiasmatic nucleus (SCN), in which self-sustaining transcriptional/posttranslational feedback loops define approximately 24-h (circadian) time. Cryptochrome1 (CRY1) and CRY2 are essential clock components, but how they sustain cell-autonomous and circuit-level circadian timing in the SCN is not clear. To explore this, we developed a genetic complementation assay, using virally expressed, fluorescently tagged CRY proteins to test whether molecular pacemaking can be induced in arrhythmic Cry1/2-deficient SCN. We demonstrate protein-specific and robust induction of molecular pacemaking, the efficacy of which depends on the circadian pattern and phase of Cry expression and functional signaling via neuropeptide (AVP) receptors.