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Research ArticleArticle

Induction of Cytochrome P450: Assessment in an Immortalized Human Hepatocyte Cell Line (Fa2N4) Using a Novel Higher Throughput Cocktail Assay

Kuresh A. Youdim, Christine A. Tyman, Barry C. Jones and Ruth Hyland
Drug Metabolism and Disposition February 2007, 35 (2) 275-282; DOI: https://doi.org/10.1124/dmd.106.012864
Kuresh A. Youdim
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Christine A. Tyman
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Barry C. Jones
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Ruth Hyland
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Abstract

Over recent years the application of cocktail studies to measure biological markers has become increasingly popular. The current study investigated a novel approach in assessing cytochrome P450 (P450) enzyme induction in an immortalized cell line using a cocktail of five P450 substrate probes compared with the traditional single-probe approach. The findings reported herein support use of a cocktail approach to assess the induction of the major P450s, namely, CYP3A4, CYP1A2, and CYP2C9. CYP2C19 and CYP2D6 could also be followed as part of the cocktail approach reported. Response to prototypical inducers did not differ to those observed in the presence of the specific probes alone. Consequently, this approach requires significantly fewer sample numbers if screening the induction potential of more than one P450. Moreover, these studies highlight the utility of the immortalized cell line Fa2N4 as a robust model system for induction studies. In conclusion, the current experimental setup is an improvement on current approaches used to assess P450 induction, significantly increasing sample throughput.

Footnotes

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

  • doi:10.1124/dmd.106.012864.

  • ABBREVIATIONS: DDI, drug-drug interaction(s); NCE, new chemical entity; P450, cytochrome P450; PXR, pregnane X receptor; AhR, aryl hydrocarbon receptor; CAR constitutive androstane receptor; PBS, phosphate-buffered saline; KHB, Krebs-Henseleit bicarbonate; ANOVA, analysis of variance; CI, confidence interval(s).

    • Received September 11, 2006.
    • Accepted November 10, 2006.
  • The American Society for Pharmacology and Experimental Therapeutics
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Drug Metabolism and Disposition: 35 (2)
Drug Metabolism and Disposition
Vol. 35, Issue 2
1 Feb 2007
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Research ArticleArticle

Induction of Cytochrome P450: Assessment in an Immortalized Human Hepatocyte Cell Line (Fa2N4) Using a Novel Higher Throughput Cocktail Assay

Kuresh A. Youdim, Christine A. Tyman, Barry C. Jones and Ruth Hyland
Drug Metabolism and Disposition February 1, 2007, 35 (2) 275-282; DOI: https://doi.org/10.1124/dmd.106.012864

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Research ArticleArticle

Induction of Cytochrome P450: Assessment in an Immortalized Human Hepatocyte Cell Line (Fa2N4) Using a Novel Higher Throughput Cocktail Assay

Kuresh A. Youdim, Christine A. Tyman, Barry C. Jones and Ruth Hyland
Drug Metabolism and Disposition February 1, 2007, 35 (2) 275-282; DOI: https://doi.org/10.1124/dmd.106.012864
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