A Parabrachial-Hypothalamic Cholecystokinin Neurocircuit Controls Counterregulatory Responses to Hypoglycemia
Year: 2014
Type: article
Abstract: Hypoglycemia engenders an autonomically mediated counterregulatory (CR)-response that stimulates endogenous glucose production to maintain concentrations within an appropriate physiological range. Although the involvement of the brain in preserving normoglycemia has been established, the neurocircuitry underlying centrally mediated CR-responses remains unclear. Here we demonstrate that lateral parabrachial nucleus cholecystokinin (CCK(LPBN)) neurons are a population of glucose-sensing cells (glucose inhibited) with counterregulatory capacity. Furthermore, we reveal that steroidogenic-factor 1 (SF1)-expressing neurons of the ventromedial nucleus of the hypothalamus (SF1(VMH)) are the specific target of CCK(LPBN) glucoregulatory neurons. This discrete CCK(LPBN)→SF1(VMH) neurocircuit is both necessary and sufficient for the induction of CR-responses. Together, these data identify CCK(LPBN) neurons, and specifically CCK neuropeptide, as glucoregulatory and provide significant insight into the homeostatic mechanisms controlling CR-responses to hypoglycemia.
Source: Cell Metabolism
Language: English
Subfield: Endocrine and Autonomic Systems
Field: Neuroscience
Domain: Life Sciences
Open Access status: hybrid
Estimated APC paid: $4,550
Awards: G117257630, G2019238319, G2282780651, G301048564, G3780613414, Vanderbilt Mouse Metabolic Phenotyping Center, Metabolic consequence of in vivo modulation of discrete serotonergic pathways., A Leptin-Regulated Brainstem Pathway That Controls Glucose and Energy Homeostasis, G5436572433, G571482118, G6215251796, AgRP neurons: circadian control and interactions with the HPA axis, G8458495882, G9000313039, Michigan Diabetes Research Center (MDRC), Vanderbilt Diabetes Research Center
OpenAlex ID: W2099715459