LXRα fuels fatty acid-stimulated oxygen consumption in white adipocytes.
J Lipid Res
; 55(2): 247-57, 2014 Feb.
Article
en En
| MEDLINE
| ID: mdl-24259533
ABSTRACT
Liver X receptors (LXRs) are transcription factors known for their role in hepatic cholesterol and lipid metabolism. Though highly expressed in fat, the role of LXR in this tissue is not well characterized. We generated adipose tissue LXRα knockout (ATaKO) mice and showed that these mice gain more weight and fat mass on a high-fat diet compared with wild-type controls. White adipose tissue (WAT) accretion in ATaKO mice results from both a decrease in WAT lipolytic and oxidative capacities. This was demonstrated by decreased expression of the ß2- and ß3-adrenergic receptors, reduced level of phosphorylated hormone-sensitive lipase, and lower oxygen consumption rates (OCRs) in WAT of ATaKO mice. Furthermore, LXR activation in vivo and in vitro led to decreased adipocyte size in WAT and increased glycerol release from primary adipocytes, respectively, with a concomitant increase in OCR in both models. Our findings show that absence of LXRα in adipose tissue results in elevated adiposity through a decrease in WAT oxidation, secondary to attenuated FA availability.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Consumo de Oxígeno
/
Adipocitos Blancos
/
Ácidos Grasos
/
Receptores Nucleares Huérfanos
/
Lipólisis
Tipo de estudio:
Prognostic_studies
Límite:
Animals
Idioma:
En
Revista:
J Lipid Res
Año:
2014
Tipo del documento:
Article