Duodenal lipid sensing activates vagal afferents to regulate non-shivering brown fat thermogenesis in rats.

Duodenal lipid sensing activates vagal afferents to regulate non-shivering brown fat thermogenesis in rats.
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DOI:
10.1371/journal.pone.0051898
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发表时间:
2012
期刊:
影响因子:
3.7
通讯作者:
Schwartz GJ
Schwartz GJ
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Blouet C;Schwartz GJ

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Previous evidence indicates that duodenal lipid sensing engages gut-brain neurocircuits to determine food intake and hepatic glucose production, but a potential role for gut-brain communication in the control of energy expenditure remains to be determined. Here, we tested the hypothesis that duodenal lipid sensing activates a gut–brain–brown adipose tissue neuraxis to regulate thermogenesis. We demonstrate that direct administration of lipids into the duodenum increases brown fat temperature. Co-infusion of the local anesthetic tetracaine with duodenal lipids abolished the lipid-induced increase in brown fat temperature. Systemic administration of the CCKA receptor antagonist devazepide blocked the ability of duodenal lipids to increase brown fat thermogenesis. Parenchymal administration of the N-methyl-d-aspartate receptor blocker MK-801 directly into the caudomedial nucleus of the solitary tract also abolished duodenal lipid-induced activation of brown fat thermogenesis. These findings establish that duodenal lipid sensing activates a gut–brain–brown fat axis to determine brown fat temperature, and thereby reveal a previously unappreciated pathway that regulates thermogenesis.
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