Cholesterol and bile acids regulate xenosensor signaling in drug-mediated induction of cytochromes P450

Handschin, C. and Podvinec, M. and Amherd, R. and Looser, R. and Ourlin, J. -C. and Meyer, U. A.. (2002) Cholesterol and bile acids regulate xenosensor signaling in drug-mediated induction of cytochromes P450. Journal of Biological Chemistry, 277 (33). pp. 29561-29567.

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Official URL: http://edoc.unibas.ch/dok/A5259316

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Cytochromes P450 (CYP) constitute the major enzymatic system for metabolism of xenobiotics. Here we demonstrate that transcriptional activation of CYPs by the drug-sensing nuclear receptors pregnane X receptor, constitutive androstane receptor, and the chicken xenobiotic receptor (CXR) can be modulated by endogenous cholesterol and bile acids. Bile acids induce the chicken drug-activated CYP2H1 via CXR, whereas the hydroxylated metabolites of bile acids and oxysterols inhibit drug induction. The cholesterol-sensing liver X receptor competes with CXR, pregnane X receptor, or constitutive androstane receptor for regulation of drug-responsive enhancers from chicken CYP2H1, human CYP3A4, or human CYP2B6, respectively. Thus, not only cholesterol 7 alpha-hydroxylase (CYP7A1), but also drug-inducible CYPs, are diametrically affected by these receptors. Our findings reveal new insights into the increasingly complex network of nuclear receptors regulating lipid homeostasis and drug metabolism.
Faculties and Departments:03 Faculty of Medicine > Departement Biomedizin > Associated Research Groups > Pharmakologie (Handschin)
05 Faculty of Science > Departement Biozentrum > Growth & Development > Growth & Development (Handschin)
05 Faculty of Science > Departement Biozentrum > Services Biozentrum > Research IT (Podvinec)
UniBasel Contributors:Handschin, Christoph and Podvinec, Michael
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Society for Biochemistry and Molecular Biology
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:21 Nov 2017 12:55
Deposited On:22 Mar 2012 13:22

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