Neuronal pathway from the liver modulates energy expenditure and systemic insulin sensitivity.
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.
Uno
Kenji
K
Division of Molecular Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan.
Katagiri
Hideki
H
Yamada
Tetsuya
T
Ishigaki
Yasushi
Y
Ogihara
Takehide
T
Imai
Junta
J
Hasegawa
Yutaka
Y
Gao
Junhong
J
Kaneko
Keizo
K
Iwasaki
Hiroko
H
Ishihara
Hisamitsu
H
Sasano
Hironobu
H
Inukai
Kouichi
K
Mizuguchi
Hiroyuki
H
Asano
Tomoichiro
T
Shiota
Masakazu
M
Nakazato
Masamitsu
M
Oka
Yoshitomo
Y
D000273:Adipose Tissue / Q000294:innervation / Q000378:metabolism*; D000344:Afferent Pathways / Q000502:physiology; D000818:Animals; D001786:Blood Glucose / Q000032:analysis; D004041:Dietary Fats / Q000008:administration & dosage; D004525:Efferent Pathways / Q000502:physiology; D004734:Energy Metabolism; D005234:Fatty Liver / Q000473:pathology; D005947:Glucose / Q000378:metabolism; D005951:Glucose Tolerance Test; D007004:Hypoglycemic Agents / Q000494:pharmacology; D007328:Insulin / Q000097:blood / Q000502:physiology*; D007333:Insulin Resistance; D008066:Lipolysis; D008099:Liver / Q000294:innervation* / Q000378:metabolism* / Q000473:pathology; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL; D018482:Muscle, Skeletal / Q000378:metabolism; D010101:Oxygen Consumption; D047495:PPAR gamma / Q000235:genetics / Q000378:metabolism; D051381:Rats; D017207:Rats, Sprague-Dawley; D013564:Sympathetic Nervous System / Q000502:physiology; D014628:Vagotomy; D014630:Vagus Nerve / Q000502:physiology*; D015430:Weight Gain
D001786:Blood Glucose; D004041:Dietary Fats; D007004:Hypoglycemic Agents; D007328:Insulin; D047495:PPAR gamma; D005947:Glucose