Abstract:
:Signaling by the corticotropin-releasing factor receptor type 1 (CRFR1) plays an important role in mediating the autonomic response to stressful challenges. Multiple hypothalamic nuclei regulate sympathetic outflow. Although CRFR1 is highly expressed in the arcuate nucleus (Arc) of the hypothalamus, the identity of these neurons and the role of CRFR1 here are presently unknown. Our studies show that nearly half of Arc-CRFR1 neurons coexpress agouti-related peptide (AgRP), half of which originate from POMC precursors. Arc-CRFR1 neurons are innervated by CRF neurons in the hypothalamic paraventricular nucleus, and CRF application decreases AgRP(+)CRFR1(+) neurons' excitability. Despite similar anatomy in both sexes, only female mice selectively lacking CRFR1 in AgRP neurons showed a maladaptive thermogenic response to cold and reduced hepatic glucose production during fasting. Thus, CRFR1, in a subset of AgRP neurons, plays a regulatory role that enables appropriate sympathetic nervous system activation and consequently protects the organism from hypothermia and hypoglycemia.
journal_name
Cell Metabjournal_title
Cell metabolismauthors
Kuperman Y,Weiss M,Dine J,Staikin K,Golani O,Ramot A,Nahum T,Kühne C,Shemesh Y,Wurst W,Harmelin A,Deussing JM,Eder M,Chen Adoi
10.1016/j.cmet.2016.04.017subject
Has Abstractpub_date
2016-06-14 00:00:00pages
1185-1199issue
6eissn
1550-4131issn
1932-7420pii
S1550-4131(16)30169-3journal_volume
23pub_type
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