Bile acid sulfation: A pathway of bile acid elimination and detoxification

Research output: Contribution to journalReview article

135 Citations (Scopus)

Abstract

Sulfotransferase-2A1 catalyzes the formation of bile acid-sulfates (BA-sulfates). Sulfation of BAs increases their solubility, decreases their intestinal absorption, and enhances their fecal and urinary excretion. BA-sulfates are also less toxic than their unsulfated counterparts. Therefore, sulfation is an important detoxification pathway of BAs. Major species differences in BA sulfation exist. In humans, only a small proportion of BAs in bile and serum are sulfated, whereas more than 70% of BAs in urine are sulfated, indicating their efficient elimination in urine. The formation of BA-sulfates increases during cholestatic diseases. Therefore, sulfation may play an important role in maintaining BA homeostasis under pathologic conditions. Farnesoid X receptor, pregnane X receptor, constitutive androstane receptor, and vitamin D receptor are potential nuclear receptors that may be involved in the regulation of BA sulfation. This review highlights current knowledge about the enzymes and transporters involved in the formation and elimination of BA-sulfates, the effect of sulfation on the pharmacologic and toxicologic properties of BAs, the role of BA sulfation in cholestatic diseases, and the regulation of BA sulfation.

Original languageEnglish (US)
Pages (from-to)225-246
Number of pages22
JournalToxicological Sciences
Volume108
Issue number2
DOIs
StatePublished - Apr 17 2009

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Detoxification
Bile Acids and Salts
Urine
Sulfotransferases
Calcitriol Receptors
Poisons
Intestinal Absorption
Cytoplasmic and Nuclear Receptors
Bile
Solubility
Homeostasis
bile acid sulfates
Enzymes
Serum

Keywords

  • Bile acids
  • Cholestasis
  • Gender difference
  • Homeostasis
  • Nuclear receptors
  • Regulation
  • SULT
  • Sulfate
  • Sulfation
  • Sulfonate
  • Sulfonation
  • Sulfotransferase

ASJC Scopus subject areas

  • Toxicology

Cite this

Bile acid sulfation : A pathway of bile acid elimination and detoxification. / Alnouti, Yazen.

In: Toxicological Sciences, Vol. 108, No. 2, 17.04.2009, p. 225-246.

Research output: Contribution to journalReview article

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