Neuronal pathway from the liver modulates energy expenditure and systemic insulin sensitivity.

Uno K, Katagiri H, Yamada T, Ishigaki Y, Ogihara T, Imai J, Hasegawa Y, Gao J, Kaneko K, Iwasaki H, Ishihara H, Sasano H, Inukai K, Mizuguchi H, Asano T, Shiota M, Nakazato M, Oka Y
Science. 2006 312 (5780): 1656-9

PMID: 16778057 · DOI:10.1126/science.1126010

Coordinated control of energy metabolism and glucose homeostasis requires communication between organs and tissues. We identified a neuronal pathway that participates in the cross talk between the liver and adipose tissue. By studying a mouse model, we showed that adenovirus-mediated expression of peroxisome proliferator-activated receptor (PPAR)-g2 in the liver induces acute hepatic steatosis while markedly decreasing peripheral adiposity. These changes were accompanied by increased energy expenditure and improved systemic insulin sensitivity. Hepatic vagotomy and selective afferent blockage of the hepatic vagus revealed that the effects on peripheral tissues involve the afferent vagal nerve. Furthermore, an antidiabetic thiazolidinedione, a PPARg agonist, enhanced this pathway. This neuronal pathway from the liver may function to protect against metabolic perturbation induced by excessive energy storage.

MeSH Terms (27)

Adipose Tissue Afferent Pathways Animals Blood Glucose Dietary Fats Efferent Pathways Energy Metabolism Fatty Liver Glucose Glucose Tolerance Test Hypoglycemic Agents Insulin Insulin Resistance Lipolysis Liver Male Mice Mice, Inbred C57BL Muscle, Skeletal Oxygen Consumption PPAR gamma Rats Rats, Sprague-Dawley Sympathetic Nervous System Vagotomy Vagus Nerve Weight Gain

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