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Bile acid-induced inflammatory signaling in mice lacking Foxa2 in the liver leads to activation of mTOR and age-onset obesity.

Abstract：

:Cytokine signaling has been connected to regulation of metabolism and energy balance. Numerous cytokine gene expression changes are stimulated by accumulation of bile acids in livers of young Foxa2 liver-conditional null mice. We hypothesized that bile acid-induced inflammation in young Foxa2 mutants, once chronic, affects metabolic homeostasis. We found that loss of Foxa2 in the liver results in a premature aging phenotype, including significant weight gain, reduced food intake, and decreased energy expenditure. We show that Foxa2 antagonizes the mammalian target of rapamycin (mTOR) pathway, resulting in increased hepatic lipogenesis and adiposity. While much prior work has focused on adipose tissue in obesity, we discovered a novel age-onset obesity phenotype in a model where gene deletion occurs only in the liver, underscoring the importance of the role hepatic lipogenesis plays in the development of obesity.

journal_name

Mol Metab

journal_title

Molecular metabolism

authors

Bochkis IM,Shin S,Kaestner KH

doi

10.1016/j.molmet.2013.08.005

subject

Has Abstract

pub_date

2013-08-24 00:00:00

pages

447-56

issue

4

issn

2212-8778

pii

S2212-8778(13)00088-4

journal_volume

2

pub_type

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