Functional identification of a neurocircuit regulating blood glucose.
Proc Natl Acad Sci U S A
; 113(14): E2073-82, 2016 Apr 05.
Article
em En
| MEDLINE
| ID: mdl-27001850
ABSTRACT
Previous studies implicate the hypothalamic ventromedial nucleus (VMN) in glycemic control. Here, we report that selective inhibition of the subset of VMN neurons that express the transcription factor steroidogenic-factor 1 (VMN(SF1) neurons) blocks recovery from insulin-induced hypoglycemia whereas, conversely, activation of VMN(SF1) neurons causes diabetes-range hyperglycemia. Moreover, this hyperglycemic response is reproduced by selective activation of VMN(SF1) fibers projecting to the anterior bed nucleus of the stria terminalis (aBNST), but not to other brain areas innervated by VMN(SF1) neurons. We also report that neurons in the lateral parabrachial nucleus (LPBN), a brain area that is also implicated in the response to hypoglycemia, make synaptic connections with the specific subset of glucoregulatory VMN(SF1) neurons that project to the aBNST. These results collectively establish a physiological role in glucose homeostasis for VMN(SF1) neurons and suggest that these neurons are part of an ascending glucoregulatory LPBNâVMN(SF1)âaBNST neurocircuit.
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Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Núcleo Hipotalâmico Ventromedial
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Glicemia
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Neurônios Aferentes
Tipo de estudo:
Diagnostic_studies
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Prognostic_studies
Limite:
Animals
Idioma:
En
Ano de publicação:
2016
Tipo de documento:
Article