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A Hypothalamic Phosphatase Switch Coordinates Energy Expenditure with Feeding.

Cell metabolism | Aug 1, 2017

Beige adipocytes can interconvert between white and brown-like states and switch between energy storage versus expenditure. Here we report that beige adipocyte plasticity is important for feeding-associated changes in energy expenditure and is coordinated by the hypothalamus and the phosphatase TCPTP. A fasting-induced and glucocorticoid-mediated induction of TCPTP, inhibited insulin signaling in AgRP/NPY neurons, repressed the browning of white fat and decreased energy expenditure. Conversely feeding reduced hypothalamic TCPTP, to increase AgRP/NPY neuronal insulin signaling, white adipose tissue browning and energy expenditure. The feeding-induced repression of hypothalamic TCPTP was defective in obesity. Mice lacking TCPTP in AgRP/NPY neurons were resistant to diet-induced obesity and had increased beige fat activity and energy expenditure. The deletion of hypothalamic TCPTP in obesity restored feeding-induced browning and increased energy expenditure to promote weight loss. Our studies define a hypothalamic switch that coordinates energy expenditure with feeding for the maintenance of energy balance.

Pubmed ID: 28768176 RIS Download

Mesh terms: Agouti-Related Protein | Animals | Eating | Energy Metabolism | Hypothalamus | Mice | Mice, Transgenic | Neuropeptide Y | Obesity | Protein Tyrosine Phosphatase, Non-Receptor Type 2

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