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Role of the Intestinal Bile Acid Transporters in Bile Acid and Drug Disposition

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Dawson, Paul A.·2011·Handbook of Experimental Pharmacology

Abstract

Membrane transporters expressed by the hepatocyte and enterocyte play critical roles in maintaining the enterohepatic circulation of bile acids, an effective recycling and conservation mechanism that largely restricts these potentially cytotoxic detergents to the intestinal and hepatobiliary compartments. In doing so, the hepatic and enterocyte transport systems ensure a continuous supply of bile acids to be used repeatedly during the digestion of multiple meals throughout the day. Absorption of bile acids from the intestinal lumen and export into the portal circulation is mediated by a series of transporters expressed on the enterocyte apical and basolateral membranes. The ileal apical sodium-dependent bile acid cotransporter (abbreviated ASBT; gene symbol, SLC10A2) is responsible for the initial uptake of bile acids across the enterocyte brush border membrane. The bile acids are then efficiently shuttled across the cell and exported across the basolateral membrane by the heteromeric Organic Solute Transporter, OSTα-OSTβ. This chapter briefly reviews the tissue expression, physiology, genetics, pathophysiology, and transport properties of the ASBT and OSTα-OSTα. In addition, the chapter discusses the relationship between the intestinal bile acid transporters and drug metabolism, including development of ASBT inhibitors as novel hypocholesterolemic or hepatoprotective agents, prodrug targeting of the ASBT to increase oral bioavailability, and involvement of the intestinal bile acid transporters in drug absorption and drug-drug interactions.

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Metadata

Authors
Dawson, P. A.
Venue
Handbook of Experimental Pharmacology
Published
2010-10-26
Issue
201
Pages
169-203
ISSN
  • 0171-2004 (ISSN-L)
  • 1865-0325
OpenAlex
W1514132913
Cited by
227
References
9
FWCI
11.10
Type
book chapter
Language
en
Open access
green

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CoChat. (2026). Citation check: Role of the Intestinal Bile Acid Transporters in Bile Acid and Drug Disposition. https://app.cochat.ai/papers/10.1007/978-3-642-14541-4_4
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Dawson, P. A. (2011). Role of the Intestinal Bile Acid Transporters in Bile Acid and Drug Disposition. Handbook of Experimental Pharmacology. https://doi.org/10.1007/978-3-642-14541-4_4

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