Abstract:
:Systemic bile acid (BA) homeostasis is a critical determinant of dietary fat digestion, enterohepatic function, and postprandial thermogenesis. However, major checkpoints for the dynamics and the molecular regulation of BA homeostasis remain unknown. Here we show that hypothalamic-pituitary-adrenal (HPA) axis impairment in humans and liver-specific deficiency of the glucocorticoid receptor (GR) in mice disrupts the normal changes in systemic BA distribution during the fasted-to-fed transition. Fasted mice with hepatocyte-specific GR knockdown had smaller gallbladder BA content and were more susceptible to developing cholesterol gallstones when fed a cholesterol-rich diet. Hepatic GR deficiency impaired liver BA uptake/transport via lower expression of the major hepatocyte basolateral BA transporter, Na(+)-taurocholate transport protein (Ntcp/Slc10a1), which affected dietary fat absorption and brown adipose tissue activation. Our results demonstrate a role of the HPA axis in the endocrine regulation of BA homeostasis through the liver GR control of enterohepatic BA recycling.
journal_name
Cell Metabjournal_title
Cell metabolismauthors
Rose AJ,Berriel Díaz M,Reimann A,Klement J,Walcher T,Krones-Herzig A,Strobel O,Werner J,Peters A,Kleyman A,Tuckermann JP,Vegiopoulos A,Herzig Sdoi
10.1016/j.cmet.2011.04.010subject
Has Abstractpub_date
2011-07-06 00:00:00pages
123-30issue
1eissn
1550-4131issn
1932-7420pii
S1550-4131(11)00210-5journal_volume
14pub_type
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