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Research ArticleArticle

Trovafloxacin-Induced Gene Expression Changes in Liver-Derived in Vitro Systems: Comparison of Primary Human Hepatocytes to HepG2 Cells

Michael J. Liguori, Eric A.G. Blomme and Jeffrey F. Waring
Drug Metabolism and Disposition February 2008, 36 (2) 223-233; DOI: https://doi.org/10.1124/dmd.107.017608
Michael J. Liguori
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Eric A.G. Blomme
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Jeffrey F. Waring
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Abstract

Primary human hepatocytes (PHH) are a main instrument in drug metabolism research and in the prediction of drug-induced phase I/II enzyme induction in humans. The HepG2 liver-derived cell line is commonly used as a surrogate for human hepatocytes, but its use in absorption, distribution, metabolism, and excretion and toxicity studies can be limited because of lowered basal levels of metabolizing enzymes. Despite the widespread use of HepG2 cells, a comparison of their transcriptomes with those of PHH has not been well characterized. In this study, microarray analysis was conducted to ascertain the differences and similarities in mRNA expression between HepG2 cells and human hepatocytes before and after exposure to a panel of fluoroquinolone compounds. Comparison of the naive HepG2 cell and PHH transcriptomes revealed a substantial number of basal gene expression differences. When HepG2 cells were dosed with a series of fluoroquinolones, trovafloxacin (TVX), which has been associated with human idiosyncratic hepatotoxicity, induced substantially more gene expression changes than the other quinolones, similar to previous observations with PHH. Although TVX-treatment resulted in many gene expression differences between HepG2 cells and PHH, there were also a number of TVX-induced commonalities, including genes involved in RNA processing and mitochondrial function. Taken together, these results provide insight for interpretation of results from drug metabolism and toxicity studies conducted with HepG2 cells in lieu of PHH and could provide further insight into the mechanistic evaluation of TVX-induced hepatotoxicity.

Footnotes

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

  • doi:10.1124/dmd.107.017608.

  • ABBREVIATIONS: ADME, absorption, distribution, metabolism, and excretion; PHH, primary human hepatocyte(s); P450, cytochrome P-450; IDR, idiosyncratic drug reaction; TVX, trovafloxacin; MTS, 3-(4,5-dimethylthiazol-2-yl)-5-(3-carboxymethoxyphenyl)-2-(4-sulfophenyl)-2H-tetrazolium; NCBI, National Center for Biotechnology Information; UGT, UDP-glucuronosyltransferase; ANOVA, analysis of variance; IL-8, interleukin 8.

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

    • Received July 12, 2007.
    • Accepted October 25, 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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Research ArticleArticle

Trovafloxacin-Induced Gene Expression Changes in Liver-Derived in Vitro Systems: Comparison of Primary Human Hepatocytes to HepG2 Cells

Michael J. Liguori, Eric A.G. Blomme and Jeffrey F. Waring
Drug Metabolism and Disposition February 1, 2008, 36 (2) 223-233; DOI: https://doi.org/10.1124/dmd.107.017608

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Research ArticleArticle

Trovafloxacin-Induced Gene Expression Changes in Liver-Derived in Vitro Systems: Comparison of Primary Human Hepatocytes to HepG2 Cells

Michael J. Liguori, Eric A.G. Blomme and Jeffrey F. Waring
Drug Metabolism and Disposition February 1, 2008, 36 (2) 223-233; DOI: https://doi.org/10.1124/dmd.107.017608
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