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Research ArticleArticle

Human Pharmacokinetic Prediction of UDP-Glucuronosyltransferase Substrates with an Animal Scale-Up Approach

Tsuneo Deguchi, Nobuaki Watanabe, Atsushi Kurihara, Katsuhiro Igeta, Hidenori Ikenaga, Keiichi Fusegawa, Norio Suzuki, Shinji Murata, Masakazu Hirouchi, Yoshitake Furuta, Masaru Iwasaki, Osamu Okazaki and Takashi Izumi
Drug Metabolism and Disposition May 2011, 39 (5) 820-829; DOI: https://doi.org/10.1124/dmd.110.037457
Tsuneo Deguchi
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Nobuaki Watanabe
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Atsushi Kurihara
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Katsuhiro Igeta
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Hidenori Ikenaga
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Keiichi Fusegawa
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Norio Suzuki
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Shinji Murata
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Masakazu Hirouchi
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Yoshitake Furuta
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Masaru Iwasaki
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Osamu Okazaki
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Takashi Izumi
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Abstract

The aim of the current study was to evaluate the accuracy of allometric scaling methods for drugs metabolized by UDP-glucuronosyltransferases (UGTs), such as ketoprofen, imipramine, lorazepam, levofloxacin, zidovudine, diclofenac, furosemide, raloxifene, gemfibrozil, mycophenolic acid, indomethacin, and telmisartan. Human plasma clearance (CL) predictions were conducted from preclinical in vivo data by using multiple-species allometry with the rule of exponents and single-species allometric scaling (SSS) of mice, rats, monkeys, or dogs. Distribution volume at a steady state (Vss) was predicted by multiple-species allometry or SSS of Vss. Oral plasma clearance (CLpo) was calculated under the assumption that Fa × Fg was equivalent across species. Each of the results was compared with the observed parameter calculated from the clinical data after intravenous or oral administration. Multiple-species allometry and SSS of mice, rats, and dogs resulted in a similar accuracy of CL and CLpo predictions. Monkeys tended to provide the most accurate predictions of human CL and CLpo. The ability to predict the half-life, which was determined from CL and Vss predictions, was more accurate in SSS of rats and monkeys. The in vivo fraction metabolized by glucuronidation (fm,UGT) in bile duct-cannulated monkeys was relatively similar to that of humans compared with other animal species, which likely contributed to the highest accuracy of SSS prediction of monkeys. On the basis of the current results, monkeys would be more reliable than other animal species in predicting human pharmacokinetics and fm,UGT for drugs metabolized by UGTs.

Footnotes

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

    doi:10.1124/dmd.110.037457.

  • ABBREVIATIONS:

    UGT
    UDP-glucuronosyltransferase
    CL
    clearance
    CLB
    blood clearance
    CLpo
    oral plasma clearance
    F
    oral bioavailability
    fm,UGT
    fraction metabolized by glucuronidation
    fu
    unbound fraction of plasma protein binding
    LC/MS/MS
    liquid chromatography/tandem mass spectrometry
    P450
    cytochrome P450
    PK
    pharmacokinetics
    RB
    blood-to-plasma concentration ratio
    ROE
    rule of exponent
    SSS
    single-species allometric scaling
    Vss
    distribution volume at steady state.

  • Received November 29, 2010.
  • Accepted January 31, 2011.
  • Copyright © 2011 by The American Society for Pharmacology and Experimental Therapeutics
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Drug Metabolism and Disposition: 39 (5)
Drug Metabolism and Disposition
Vol. 39, Issue 5
1 May 2011
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Research ArticleArticle

Human Pharmacokinetic Prediction of UDP-Glucuronosyltransferase Substrates with an Animal Scale-Up Approach

Tsuneo Deguchi, Nobuaki Watanabe, Atsushi Kurihara, Katsuhiro Igeta, Hidenori Ikenaga, Keiichi Fusegawa, Norio Suzuki, Shinji Murata, Masakazu Hirouchi, Yoshitake Furuta, Masaru Iwasaki, Osamu Okazaki and Takashi Izumi
Drug Metabolism and Disposition May 1, 2011, 39 (5) 820-829; DOI: https://doi.org/10.1124/dmd.110.037457

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Research ArticleArticle

Human Pharmacokinetic Prediction of UDP-Glucuronosyltransferase Substrates with an Animal Scale-Up Approach

Tsuneo Deguchi, Nobuaki Watanabe, Atsushi Kurihara, Katsuhiro Igeta, Hidenori Ikenaga, Keiichi Fusegawa, Norio Suzuki, Shinji Murata, Masakazu Hirouchi, Yoshitake Furuta, Masaru Iwasaki, Osamu Okazaki and Takashi Izumi
Drug Metabolism and Disposition May 1, 2011, 39 (5) 820-829; DOI: https://doi.org/10.1124/dmd.110.037457
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