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Rapid CommunicationShort Communication

Multiplexed Targeted Quantitative Proteomics Predicts Hepatic Glucuronidation Potential

Guillaume Margaillan, Michèle Rouleau, Kathrin Klein, John K. Fallon, Patrick Caron, Lyne Villeneuve, Philip C. Smith, Ulrich M. Zanger and Chantal Guillemette
Drug Metabolism and Disposition September 2015, 43 (9) 1331-1335; DOI: https://doi.org/10.1124/dmd.115.065391
Guillaume Margaillan
Pharmacogenomics Laboratory, Centre Hospitalier Universitaire (CHU) de Québec and Faculty of Pharmacy, Université Laval, Québec, Canada (G.M., M.R., P.C., L.V., C.G.); Dr. Margarete Fischer-Bosch Institute of Clinical Pharmacology, Stuttgart, and University of Tübingen, Tübingen, Germany (K.K., U.M.Z.); Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, North Carolina (J.K.F., P.C.S.); Canada Research Chair in Pharmacogenomics (C.G.)
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Michèle Rouleau
Pharmacogenomics Laboratory, Centre Hospitalier Universitaire (CHU) de Québec and Faculty of Pharmacy, Université Laval, Québec, Canada (G.M., M.R., P.C., L.V., C.G.); Dr. Margarete Fischer-Bosch Institute of Clinical Pharmacology, Stuttgart, and University of Tübingen, Tübingen, Germany (K.K., U.M.Z.); Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, North Carolina (J.K.F., P.C.S.); Canada Research Chair in Pharmacogenomics (C.G.)
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Kathrin Klein
Pharmacogenomics Laboratory, Centre Hospitalier Universitaire (CHU) de Québec and Faculty of Pharmacy, Université Laval, Québec, Canada (G.M., M.R., P.C., L.V., C.G.); Dr. Margarete Fischer-Bosch Institute of Clinical Pharmacology, Stuttgart, and University of Tübingen, Tübingen, Germany (K.K., U.M.Z.); Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, North Carolina (J.K.F., P.C.S.); Canada Research Chair in Pharmacogenomics (C.G.)
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John K. Fallon
Pharmacogenomics Laboratory, Centre Hospitalier Universitaire (CHU) de Québec and Faculty of Pharmacy, Université Laval, Québec, Canada (G.M., M.R., P.C., L.V., C.G.); Dr. Margarete Fischer-Bosch Institute of Clinical Pharmacology, Stuttgart, and University of Tübingen, Tübingen, Germany (K.K., U.M.Z.); Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, North Carolina (J.K.F., P.C.S.); Canada Research Chair in Pharmacogenomics (C.G.)
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Patrick Caron
Pharmacogenomics Laboratory, Centre Hospitalier Universitaire (CHU) de Québec and Faculty of Pharmacy, Université Laval, Québec, Canada (G.M., M.R., P.C., L.V., C.G.); Dr. Margarete Fischer-Bosch Institute of Clinical Pharmacology, Stuttgart, and University of Tübingen, Tübingen, Germany (K.K., U.M.Z.); Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, North Carolina (J.K.F., P.C.S.); Canada Research Chair in Pharmacogenomics (C.G.)
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Lyne Villeneuve
Pharmacogenomics Laboratory, Centre Hospitalier Universitaire (CHU) de Québec and Faculty of Pharmacy, Université Laval, Québec, Canada (G.M., M.R., P.C., L.V., C.G.); Dr. Margarete Fischer-Bosch Institute of Clinical Pharmacology, Stuttgart, and University of Tübingen, Tübingen, Germany (K.K., U.M.Z.); Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, North Carolina (J.K.F., P.C.S.); Canada Research Chair in Pharmacogenomics (C.G.)
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Philip C. Smith
Pharmacogenomics Laboratory, Centre Hospitalier Universitaire (CHU) de Québec and Faculty of Pharmacy, Université Laval, Québec, Canada (G.M., M.R., P.C., L.V., C.G.); Dr. Margarete Fischer-Bosch Institute of Clinical Pharmacology, Stuttgart, and University of Tübingen, Tübingen, Germany (K.K., U.M.Z.); Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, North Carolina (J.K.F., P.C.S.); Canada Research Chair in Pharmacogenomics (C.G.)
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Ulrich M. Zanger
Pharmacogenomics Laboratory, Centre Hospitalier Universitaire (CHU) de Québec and Faculty of Pharmacy, Université Laval, Québec, Canada (G.M., M.R., P.C., L.V., C.G.); Dr. Margarete Fischer-Bosch Institute of Clinical Pharmacology, Stuttgart, and University of Tübingen, Tübingen, Germany (K.K., U.M.Z.); Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, North Carolina (J.K.F., P.C.S.); Canada Research Chair in Pharmacogenomics (C.G.)
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Chantal Guillemette
Pharmacogenomics Laboratory, Centre Hospitalier Universitaire (CHU) de Québec and Faculty of Pharmacy, Université Laval, Québec, Canada (G.M., M.R., P.C., L.V., C.G.); Dr. Margarete Fischer-Bosch Institute of Clinical Pharmacology, Stuttgart, and University of Tübingen, Tübingen, Germany (K.K., U.M.Z.); Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, North Carolina (J.K.F., P.C.S.); Canada Research Chair in Pharmacogenomics (C.G.)
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Abstract

Phase II metabolism is prominently governed by UDP-glucuronosyltransferases (UGTs) in humans. These enzymes regulate the bioactivity of many drugs and endogenous small molecules in many organs, including the liver, a major site of regulation by the glucuronidation pathway. This study determined the expression of hepatic UGTs by targeted proteomics in 48 liver samples and by measuring the glucuronidation activity using probe substrates. It demonstrates the sensitivity and accuracy of nano-ultra-performance liquid chromatography with tandem mass spectrometry to establish the complex expression profiles of 14 hepatic UGTs in a single analysis. UGT2B7 is the most abundant UGT in our collection of livers, expressed at 69 pmol/mg microsomal proteins, whereas UGT1A1, UGT1A4, UGT2B4, and UGT2B15 are similarly abundant, averaging 30–34 pmol/mg proteins. The average relative abundance of these five UGTs represents 81% of the measured hepatic UGTs. Our data further highlight the strong relationships in the expression of several UGTs. Most notably, UGT1A4 correlates with most measured UGTs, and the expression levels of UGT2B4/UGT2B7 displayed the strongest correlation. However, significant interindividual variability is observed for all UGTs, both at the level of enzyme concentrations and activity (coefficient of variation: 45%–184%). The reliability of targeted proteomics quantification is supported by the high correlation between UGT concentration and activity. Collectively, these findings expand our understanding of hepatic UGT profiles by establishing absolute hepatic concentrations of 14 UGTs and further suggest coregulated expression between most abundant hepatic UGTs. Data support the value of multiplexed targeted quantitative proteomics to accurately assess specific UGT concentrations in liver samples and hepatic glucuronidation potential.

Footnotes

    • Received May 11, 2015.
    • Accepted June 15, 2015.
  • This work was supported by the Canadian Institutes of Health Research (CIHR) [MOP-42392] to CG; the Canada Research Chair in Pharmacogenomics (Tier I) (to C.G.); and supported in part by a National Institutes of Health instrumentation grant [S10 RR024595] to PCS. G.M. was supported by a graduate scholarship from the FER, Laval University.

  • dx.doi.org/10.1124/dmd.115.065391.

  • ↵Embedded ImageThis article has supplemental material available at dmd.aspetjournals.org.

  • Copyright © 2015 by The American Society for Pharmacology and Experimental Therapeutics
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Drug Metabolism and Disposition: 43 (9)
Drug Metabolism and Disposition
Vol. 43, Issue 9
1 Sep 2015
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Rapid CommunicationShort Communication

Quantitative Proteomics Applied to Hepatic Glucuronidation

Guillaume Margaillan, Michèle Rouleau, Kathrin Klein, John K. Fallon, Patrick Caron, Lyne Villeneuve, Philip C. Smith, Ulrich M. Zanger and Chantal Guillemette
Drug Metabolism and Disposition September 1, 2015, 43 (9) 1331-1335; DOI: https://doi.org/10.1124/dmd.115.065391

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Quantitative Proteomics Applied to Hepatic Glucuronidation

Guillaume Margaillan, Michèle Rouleau, Kathrin Klein, John K. Fallon, Patrick Caron, Lyne Villeneuve, Philip C. Smith, Ulrich M. Zanger and Chantal Guillemette
Drug Metabolism and Disposition September 1, 2015, 43 (9) 1331-1335; DOI: https://doi.org/10.1124/dmd.115.065391
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