Report

Modulation of Acetaminophen-Induced Hepatotoxicity by the Xenobiotic Receptor CAR

Science  11 Oct 2002:
Vol. 298, Issue 5592, pp. 422-424
DOI: 10.1126/science.1073502

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Abstract

We have identified the xenobiotic receptor CAR (constitutive androstane receptor) as a key regulator of acetaminophen metabolism and hepatotoxicity. Known CAR activators as well as high doses of acetaminophen induced expression of three acetaminophen-metabolizing enzymes in wild-type but not in CAR null mice, and the CAR null mice were resistant to acetaminophen toxicity. Inhibition of CAR activity by administration of the inverse agonist ligand androstanol 1 hour after acetaminophen treatment blocked hepatotoxicity in wild type but not in CAR null mice. These results suggest an innovative therapeutic approach for treating the adverse effects of acetaminophen and potentially other hepatotoxic agents.

  • * These authors contributed equally to this work.

  • Present address: X-Ceptor Therapeutics Inc., 4757 Nexus Centre Drive, San Diego, CA 92121, USA.

  • To whom correspondence should be addressed. E-mail: moore{at}bcm.tmc.edu

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