[HTML][HTML] The VPAC2 receptor is essential for circadian function in the mouse suprachiasmatic nuclei
Cell, 2002•cell.com
The neuropeptides pituitary adenylate cyclase-activating polypeptide (PACAP) and
vasoactive intestinal peptide (VIP) are implicated in the photic entrainment of circadian
rhythms in the suprachiasmatic nuclei (SCN). We now report that mice carrying a null
mutation of the VPAC 2 receptor for VIP and PACAP (Vipr2−/−) are incapable of sustaining
normal circadian rhythms of rest/activity behavior. These mice also fail to exhibit circadian
expression of the core clock genes mPer1, mPer2, and mCry1 and the clock-controlled gene …
vasoactive intestinal peptide (VIP) are implicated in the photic entrainment of circadian
rhythms in the suprachiasmatic nuclei (SCN). We now report that mice carrying a null
mutation of the VPAC 2 receptor for VIP and PACAP (Vipr2−/−) are incapable of sustaining
normal circadian rhythms of rest/activity behavior. These mice also fail to exhibit circadian
expression of the core clock genes mPer1, mPer2, and mCry1 and the clock-controlled gene …
Abstract
The neuropeptides pituitary adenylate cyclase-activating polypeptide (PACAP) and vasoactive intestinal peptide (VIP) are implicated in the photic entrainment of circadian rhythms in the suprachiasmatic nuclei (SCN). We now report that mice carrying a null mutation of the VPAC2 receptor for VIP and PACAP (Vipr2−/−) are incapable of sustaining normal circadian rhythms of rest/activity behavior. These mice also fail to exhibit circadian expression of the core clock genes mPer1, mPer2, and mCry1 and the clock-controlled gene arginine vasopressin (AVP) in the SCN. Moreover, the mutants fail to show acute induction of mPer1 and mPer2 by nocturnal illumination. This study highlights the role of intercellular neuropeptidergic signaling in maintenance of circadian function within the SCN.
cell.com