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Research ArticleArticle

Expression of Hepatic UDP-Glucuronosyltransferase 1A1 and 1A6 Correlated with Increased Expression of the Nuclear Constitutive Androstane Receptor and Peroxisome Proliferator-Activated Receptor α in Male Rats Fed a High-Fat and High-Sucrose Diet

Makoto Osabe, Junko Sugatani, Tomoaki Fukuyama, Shin-ichi Ikushiro, Akira Ikari and Masao Miwa
Drug Metabolism and Disposition February 2008, 36 (2) 294-302; DOI: https://doi.org/10.1124/dmd.107.017731
Makoto Osabe
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Junko Sugatani
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Tomoaki Fukuyama
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Shin-ichi Ikushiro
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Akira Ikari
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Masao Miwa
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Abstract

Rats that consumed a high-fat and high-sucrose (HF1) diet or a high-fat (HF2) diet developed hepatic steatosis. The alteration in nutritional status affected hepatic cytochrome P450 and UDP-glucuronosyltransferase (UGT) levels. Messenger RNA and protein levels of UGT1A1 and UGT1A6 in the liver but not the jejunum were increased in male rats fed the HF1 diet. These protein levels did not increase in HF2-fed male rats or HF1-fed female rats. In contrast, the CYP1A2 protein level was decreased in the HF1 but not HF2 diet group, whereas CYP2E1 and CYP4A protein levels were elevated in the HF2 but not HF1 diet group. No significant difference in the organic anion transporter polypeptide (Oatp) 1, Oatp2, multidrug resistance-associated protein (Mrp) 2, or Mrp3 protein levels was found between the standard and HF1 diet groups of male rats. Consumption of the HF1 diet affected the in vivo metabolism of acetaminophen (APAP) such that the area under the APAP-glucuronide plasma concentration-time curve was elevated 2.1-fold in male rats but not female rats. In liver cell nuclei of male rats but not female rats, constitutive androstane receptor (CAR) and proliferator-activated receptor α (PPARα) protein levels were significantly enhanced by intake of the HF1 diet. Additionally, administration of the PPARα agonist clofibrate to male rats up-regulated UGT1A1 and UGT1A6 and down-regulated CYP1A2 in the liver. Taken together, these results indicate that nutritional status may gender-specifically influence the expression and activation of CAR and PPARα in liver cell nuclei, and this effect appears to be associated with alterations in UGT1A1 and UGT1A6 expression.

Footnotes

  • This work was in part supported by the COE21 Program, Global COE, Grant-in-Aid for Scientific Research (19590070, 19590151), and Cooperation of Innovative Technology and Advanced Research in Evolutional Area (CITY AREA) from the Ministry of Education, Culture, Sports, Science and Technology, Japan.

  • Article, publication date, and citation information can be found at http://dmd.aspetjournals.org.

  • doi:10.1124/dmd.107.017731.

  • ABBREVIATIONS: HF1 diet, high-fat and high-sucrose diet; PB, phenobarbital; APAP, acetaminophen; NAPQI, N-acetyl-p-benzoquinoneimine; UGT, UDP-glucuronosyltransferase; AG, acetaminophen glucuronide; SD diet, standard diet; CAR, constitutive androstane receptor; gtPBREM, UGT1A1 phenobarbital responsive enhancer module; PXR, pregnane X receptor; AhR, aryl hydrocarbon receptor; PPAR, peroxisome proliferator-activated receptor; Nrf2, nuclear factor E2-related factor 2; HNF, hepatocyte nuclear factor; PGC, peroxisome proliferator-activated receptor-coactivator; HF2 diet, high-fat diet; PH, 1,7-phenanthroline; CFB, clofibrate; P450, cytochrome P450; Mrp, multidrug resistance-associated protein; RXR, retinoid X receptor; ARNT, AhR nuclear translocator; Oatp, organic anion transporter polypeptide; AUC, area under plasma concentration-time curve; XRE, xenobiotic response element.

  • ↵s⃞ The online version of this article (available at http://dmd.aspetjournals.org) contains supplemental material.

    • Received July 24, 2007.
    • Accepted October 26, 2007.
  • The American Society for Pharmacology and Experimental Therapeutics
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Drug Metabolism and Disposition: 36 (2)
Drug Metabolism and Disposition
Vol. 36, Issue 2
1 Feb 2008
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Expression of Hepatic UDP-Glucuronosyltransferase 1A1 and 1A6 Correlated with Increased Expression of the Nuclear Constitutive Androstane Receptor and Peroxisome Proliferator-Activated Receptor α in Male Rats Fed a High-Fat and High-Sucrose Diet
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Research ArticleArticle

Expression of Hepatic UDP-Glucuronosyltransferase 1A1 and 1A6 Correlated with Increased Expression of the Nuclear Constitutive Androstane Receptor and Peroxisome Proliferator-Activated Receptor α in Male Rats Fed a High-Fat and High-Sucrose Diet

Makoto Osabe, Junko Sugatani, Tomoaki Fukuyama, Shin-ichi Ikushiro, Akira Ikari and Masao Miwa
Drug Metabolism and Disposition February 1, 2008, 36 (2) 294-302; DOI: https://doi.org/10.1124/dmd.107.017731

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Research ArticleArticle

Expression of Hepatic UDP-Glucuronosyltransferase 1A1 and 1A6 Correlated with Increased Expression of the Nuclear Constitutive Androstane Receptor and Peroxisome Proliferator-Activated Receptor α in Male Rats Fed a High-Fat and High-Sucrose Diet

Makoto Osabe, Junko Sugatani, Tomoaki Fukuyama, Shin-ichi Ikushiro, Akira Ikari and Masao Miwa
Drug Metabolism and Disposition February 1, 2008, 36 (2) 294-302; DOI: https://doi.org/10.1124/dmd.107.017731
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