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Characterization of porcine hepatic and intestinal drug metabolizing CYP450 : comparison with human orthologues from a quantitative, activity and selectivity perspective

Wim Schelstraete (UGent) , Laura De Clerck (UGent) , Elisabeth Govaert (UGent) , Joske Millecam (UGent) , Mathias Devreese (UGent) , Dieter Deforce (UGent) , Jan Van Bocxlaer (UGent) and Siska Croubels (UGent)
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Abstract
Over the past two decades, the pig has gained attention as a potential model for human drug metabolism. Cytochrome P450 enzymes (CYP450), a superfamily of biotransformation enzymes, are pivotal in drug metabolism. Porcine CYP450 has been demonstrated to convert typical substrates of human CYP450. Nevertheless, knowledge and insight into porcine CYP450 quantity and substrate selectivity is scant, especially regarding intestinal CYP450. The current study aimed to map the quantities of hepatic and intestinal CYP450 in the conventional pig by using a proteomic approach. Moreover, the selectivity of the six most common used probe substrates (phenacetin, coumarin, midazolam, tolbutamide, dextromethorphan, and chlorzoxazone) for drug metabolizing enzyme subfamilies (CYP1A, CYP2A, CYP3A, CYP2C, CYP2D and CYP2E respectively), was investigated. Hepatic relative quantities were 4% (CYP1A), 31% (CYP2A), 14% (CYP3A), 10% (CYP2C), 28% (CYP2D) and 13% (CYP2E), whereas for the intestine only duodenal CYP450 could be determined with 88% for CYP3A and 12% for CYP2C. Furthermore, the results indicate that coumarin (CYP2A), midazolam (CYP3A), tolbutamide (CYP2C), and dextromethorphan (CYP2D) are as selective for porcine as for human CYP450. However, phenacetin (CYP1A2) and chlorzoxazone (CYP2E1) are less selective for the specific enzyme, despite similarities in selectivity towards the different enzymes involved compared to humans.
Keywords
HUMAN-LIVER-MICROSOMES, MESSENGER-RNA EXPRESSION, CYTOCHROME-P450 ENZYMES, IN-VITRO, TOLBUTAMIDE HYDROXYLATION, BETA-NAPHTHOFLAVONE, TISSUE DISTRIBUTION, EXPERIMENTAL-MODELS, O-DEETHYLATION, P-GLYCOPROTEIN

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Chicago
Schelstraete, Wim, Laura De Clerck, Elisabeth Govaert, Joske Millecam, Mathias Devreese, Dieter Deforce, Jan Van Bocxlaer, and Siska Croubels. 2019. “Characterization of Porcine Hepatic and Intestinal Drug Metabolizing CYP450 : Comparison with Human Orthologues from a Quantitative, Activity and Selectivity Perspective.” Scientific Reports 9.
APA
Schelstraete, W., De Clerck, L., Govaert, E., Millecam, J., Devreese, M., Deforce, D., Van Bocxlaer, J., et al. (2019). Characterization of porcine hepatic and intestinal drug metabolizing CYP450 : comparison with human orthologues from a quantitative, activity and selectivity perspective. SCIENTIFIC REPORTS, 9.
Vancouver
1.
Schelstraete W, De Clerck L, Govaert E, Millecam J, Devreese M, Deforce D, et al. Characterization of porcine hepatic and intestinal drug metabolizing CYP450 : comparison with human orthologues from a quantitative, activity and selectivity perspective. SCIENTIFIC REPORTS. 2019;9.
MLA
Schelstraete, Wim et al. “Characterization of Porcine Hepatic and Intestinal Drug Metabolizing CYP450 : Comparison with Human Orthologues from a Quantitative, Activity and Selectivity Perspective.” SCIENTIFIC REPORTS 9 (2019): n. pag. Print.
@article{8621628,
  abstract     = {Over the past two decades, the pig has gained attention as a potential model for human drug metabolism. Cytochrome P450 enzymes (CYP450), a superfamily of biotransformation enzymes, are pivotal in drug metabolism. Porcine CYP450 has been demonstrated to convert typical substrates of human CYP450. Nevertheless, knowledge and insight into porcine CYP450 quantity and substrate selectivity is scant, especially regarding intestinal CYP450. The current study aimed to map the quantities of hepatic and intestinal CYP450 in the conventional pig by using a proteomic approach. Moreover, the selectivity of the six most common used probe substrates (phenacetin, coumarin, midazolam, tolbutamide, dextromethorphan, and chlorzoxazone) for drug metabolizing enzyme subfamilies (CYP1A, CYP2A, CYP3A, CYP2C, CYP2D and CYP2E respectively), was investigated. Hepatic relative quantities were 4% (CYP1A), 31% (CYP2A), 14% (CYP3A), 10% (CYP2C), 28% (CYP2D) and 13% (CYP2E), whereas for the intestine only duodenal CYP450 could be determined with 88% for CYP3A and 12% for CYP2C. Furthermore, the results indicate that coumarin (CYP2A), midazolam (CYP3A), tolbutamide (CYP2C), and dextromethorphan (CYP2D) are as selective for porcine as for human CYP450. However, phenacetin (CYP1A2) and chlorzoxazone (CYP2E1) are less selective for the specific enzyme, despite similarities in selectivity towards the different enzymes involved compared to humans.},
  articleno    = {9233},
  author       = {Schelstraete, Wim and De Clerck, Laura and Govaert, Elisabeth and Millecam, Joske and Devreese, Mathias and Deforce, Dieter and Van Bocxlaer, Jan and Croubels, Siska},
  issn         = {2045-2322},
  journal      = {SCIENTIFIC REPORTS},
  keywords     = {HUMAN-LIVER-MICROSOMES,MESSENGER-RNA EXPRESSION,CYTOCHROME-P450 ENZYMES,IN-VITRO,TOLBUTAMIDE HYDROXYLATION,BETA-NAPHTHOFLAVONE,TISSUE DISTRIBUTION,EXPERIMENTAL-MODELS,O-DEETHYLATION,P-GLYCOPROTEIN},
  language     = {eng},
  pages        = {14},
  title        = {Characterization of porcine hepatic and intestinal drug metabolizing CYP450 : comparison with human orthologues from a quantitative, activity and selectivity perspective},
  url          = {http://dx.doi.org/10.1038/s41598-019-45212-0},
  volume       = {9},
  year         = {2019},
}

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