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Verfasst von:Slijepcevic, Davor [VerfasserIn]   i
 Blank, Antje [VerfasserIn]   i
Titel:Hepatic uptake of conjugated bile acids is mediated by both sodium taurocholate cotransporting polypeptide and organic anion transporting polypeptides and modulated by intestinal sensing of plasma bile acid levels in mice
Verf.angabe:Davor Slijepcevic, Reinout L.P. Roscam Abbing, Takeshi Katafuchi, Antje Blank, Joanne M. Donkers, Stéphanie van Hoppe, Dirk R. de Waart, Dagmar Tolenaars, Jonathan H.M. van der Meer, Manon Wildenberg, Ulrich Beuers, Ronald P.J. Oude Elferink, Alfred H. Schinkel, Stan F.J. van de Graaf
E-Jahr:2017
Jahr:12 May 2017
Umfang:13 S.
Teil:volume:66
 year:2017
 number:5
 pages:1631-1643
 extent:13
Fussnoten:Gesehen am 18.10.2018
Titel Quelle:Enthalten in: Hepatology
Ort Quelle:New York [u.a.] : Wiley Interscience, 1981
Jahr Quelle:2017
Band/Heft Quelle:66(2017), 5, Seite 1631-1643
ISSN Quelle:1527-3350
Abstract:The Na+-taurocholate cotransporting polypeptide (NTCP/SLC10A1) is believed to be pivotal for hepatic uptake of conjugated bile acids. However, plasma bile acid levels are normal in a subset of NTCP knockout mice and in mice treated with myrcludex B, a specific NTCP inhibitor. Here, we elucidated which transport proteins mediate the hepatic uptake of conjugated bile acids and demonstrated intestinal sensing of elevated bile acid levels in plasma in mice. Mice or healthy volunteers were treated with myrcludex B. Hepatic bile acid uptake kinetics were determined in wild-type (WT), organic anion transporting polypeptide (OATP) knockout mice (lacking Slco1a/1b isoforms), and human OATP1B1-transgenic mice. Effects of fibroblast growth factor 19 (FGF19) on hepatic transporter mRNA levels were assessed in rat hepatoma cells and in mice by peptide injection or adeno-associated virus-mediated overexpression. NTCP inhibition using myrcludex B had only moderate effects on bile acid kinetics in WT mice, but completely inhibited active transport of conjugated bile acid species in OATP knockout mice. Cholesterol 7α-hydroxylase Cyp7a1 expression was strongly down-regulated upon prolonged inhibition of hepatic uptake of conjugated bile acids. Fgf15 (mouse counterpart of FGF19) expression was induced in hypercholanemic OATP and NTCP knockout mice, as well as in myrcludex B-treated cholestatic mice, whereas plasma FGF19 was not induced in humans treated with myrcludex B. Fgf15/FGF19 expression was induced in polarized human enterocyte-models and mouse organoids by basolateral incubation with a high concentration (1 mM) of conjugated bile acids. Conclusion: NTCP and OATPs contribute to hepatic uptake of conjugated bile acids in mice, whereas the predominant uptake in humans is NTCP mediated. Enterocytes sense highly elevated levels of (conjugated) bile acids in the systemic circulation to induce FGF15/19, which modulates hepatic bile acid synthesis and uptake. (Hepatology 2017;66:1631-1643).
DOI:doi:10.1002/hep.29251
URL:Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.

kostenfrei: Volltext ; Verlag: http://dx.doi.org/10.1002/hep.29251
 kostenfrei: Volltext: https://aasldpubs.onlinelibrary.wiley.com/doi/abs/10.1002/hep.29251
 DOI: https://doi.org/10.1002/hep.29251
Datenträger:Online-Ressource
Sprache:eng
K10plus-PPN:1582057583
Verknüpfungen:→ Zeitschrift

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