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- Title
Endothelial HIF-1α Enables Hypothalamic Glucose Uptake to Drive POMC Neurons.
- Authors
Varela, Luis; Suyama, Shigetomo; Yan Huang; Shanabrough, Marya; Tschöp, Matthias H.; Xiao-Bing Gao; Giordano, Frank J.; Horvath, Tamas L.; Huang, Yan; Tschoep, Matthias H; Gao, Xiao-Bing
- Abstract
Glucose is the primary driver of hypothalamic proopiomelanocortin (POMC) neurons. We show that endothelial hypoxia-inducible factor 1α (HIF-1α) controls glucose uptake in the hypothalamus and that it is upregulated in conditions of undernourishment, during which POMC neuronal activity is decreased. Endothelium-specific knockdown of HIF-1α impairs the ability of POMC neurons to adapt to the changing metabolic environment in vivo, resulting in overeating after food deprivation in mice. The impaired functioning of POMC neurons was reversed ex vivo or by parenchymal glucose administration. These observations indicate an active role for endothelial cells in the central control of metabolism and suggest that central vascular impairments may cause metabolic disorders.
- Subjects
HYPOXIA-inducible factor 1; HYPOXIA-inducible factor genetics; ENDOTHELIAL growth factors; HYPOTHALAMIC hormones; PROOPIOMELANOCORTIN; PROTEIN metabolism; GLUCOSE metabolism; ANIMAL behavior; ANIMAL experimentation; CYTOLOGICAL techniques; ELECTRON microscopy; ENDOTHELIUM; ENERGY metabolism; GENETIC techniques; HYPOTHALAMUS; IMMUNOHISTOCHEMISTRY; MICE; MITOCHONDRIA; MOTIVATION (Psychology); NEURONS; POLYMERASE chain reaction; PROTEIN precursors; PROTEINS; RESEARCH funding; WESTERN immunoblotting; HYPERPHAGIA
- Publication
Diabetes, 2017, Vol 66, Issue 6, p1511
- ISSN
0012-1797
- Publication type
journal article
- DOI
10.2337/db16-1106