TY - JOUR
T1 - Sympathetic activity controls fat-induced oleoylethanolamide signaling in small intestine
AU - Fu, Jin
AU - di Patrizio, Nicholas V.
AU - Guijarro, Ana
AU - Schwartz, Gary J.
AU - Li, Xiaosong
AU - Gaetani, Silvana
AU - Astarita, Giuseppe
AU - Piomelli, Daniele
PY - 2011/4/13
Y1 - 2011/4/13
N2 - Ingestion of dietary fat stimulates production of the small-intestinal satiety factors oleoylethanolamide (OEA) and N-palmitoyl-phosphatidylethanolamine (NPPE), which reduce food intake through a combination of local (OEA) and systemic (NPPE) actions. Previous studies have shown that sympathetic innervations of the gut is necessary for duodenal infusions of fat to induce satiety, suggesting that sympathetic activity may engage small-intestinal satiety signals such as OEA and NPPE. In the present study, we show that surgical resection of the sympathetic celiac-superior mesenteric ganglion complex, which sends projections to the upper gut, abolishes feeding-induced OEA production in rat small-intestinal cells. These effects are accounted for by suppression of OEA biosynthesis, and are mimicked by administration of the selective β2-adrenergic receptor antagonist ICI-118,551. We further show that sympathetic gan-glionectomy or pharmacological blockade of β2-adrenergic receptors prevents NPPE release into the circulation. In addition, sympathetic ganglionectomy increases meal frequency and lowers satiety ratio, and these effects are corrected by pharmacological administration of OEA. The results suggest that sympathetic activity controls fat-induced satiety by enabling the coordinated production of local (OEA) and systemic (NPPE) satiety signals in the small intestine.
AB - Ingestion of dietary fat stimulates production of the small-intestinal satiety factors oleoylethanolamide (OEA) and N-palmitoyl-phosphatidylethanolamine (NPPE), which reduce food intake through a combination of local (OEA) and systemic (NPPE) actions. Previous studies have shown that sympathetic innervations of the gut is necessary for duodenal infusions of fat to induce satiety, suggesting that sympathetic activity may engage small-intestinal satiety signals such as OEA and NPPE. In the present study, we show that surgical resection of the sympathetic celiac-superior mesenteric ganglion complex, which sends projections to the upper gut, abolishes feeding-induced OEA production in rat small-intestinal cells. These effects are accounted for by suppression of OEA biosynthesis, and are mimicked by administration of the selective β2-adrenergic receptor antagonist ICI-118,551. We further show that sympathetic gan-glionectomy or pharmacological blockade of β2-adrenergic receptors prevents NPPE release into the circulation. In addition, sympathetic ganglionectomy increases meal frequency and lowers satiety ratio, and these effects are corrected by pharmacological administration of OEA. The results suggest that sympathetic activity controls fat-induced satiety by enabling the coordinated production of local (OEA) and systemic (NPPE) satiety signals in the small intestine.
UR - http://www.scopus.com/inward/record.url?scp=79955767686&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=79955767686&partnerID=8YFLogxK
U2 - 10.1523/JNEUROSCI.5668-10.2011
DO - 10.1523/JNEUROSCI.5668-10.2011
M3 - Article
C2 - 21490214
AN - SCOPUS:79955767686
SN - 0270-6474
VL - 31
SP - 5730
EP - 5736
JO - Journal of Neuroscience
JF - Journal of Neuroscience
IS - 15
ER -