Cited by 79Pharmacogenetics and Drug MetabolismDrug Transport and Resistance MechanismsDrug Solubulity and Delivery Systems

In vitro and in vivo small intestinal metabolism of CYP3A and UGT substrates in preclinical animals species and humans: species differences

Komura, Hiroshi, Iwaki, Masahiro·2011·Drug Metabolism Reviews

Abstract

Intestinal first-pass metabolism has a great impact on the bioavailability of cytochrome P450 3A4 (CYP3A) and/or uridine 5'-diphosphate (UDP)-glucoronosyltranferase (UGT) substrates in humans. In vitro and in vivo intestinal metabolism studies are essential for clarifying pharmacokinetics in animal species and for predicting the effects of human intestinal metabolism. We review species differences in intestinal metabolism both in vitro and in vivo. Based on mRNA expression levels, the major intestinal CYP3A isoform is CYP3A4 for humans, CYP3A4 (3A8) for monkeys, CYP3A9 for rats, cyp3a13 for mice, and CYP3A12 for dogs. Additionally, the intestinal-specific UGT would be UGT1A10 for humans, UGT1A8 for monkeys, and UGT1A7 for rats. In vitro and in vivo intestinal metabolism of CYP3A substrates were larger in monkeys than in humans, although a correlation in intestinal availability between monkeys and humans has been reported. Little information is available regarding species differences in in vitro and in vivo UGT activities; however, UGT-mediated in vivo intestinal metabolism has been demonstrated for raloxifene in humans and for baicalein in rats. Further assessment of intestinal metabolism, particularly for UGT substrates, is required to clarify the entire picture of species differences.

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Crossref · 10.3109/03602532.2011.597401

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Authors
Komura, H., & Iwaki, M.
Affiliations
  • Japan Tobacco (Japan) (JP)
  • Kindai University (JP)
Corresponding author
Komura, Hiroshi
Venue
Drug Metabolism Reviews
Published
2011-08-23
Volume
43
Issue
4
Pages
476-498
ISSN
  • 0360-2532 (ISSN-L)
  • 1097-9883
OpenAlex
W1970211838
Cited by
78
References
173
Citations by year
2026: 2 · 2025: 5 · 2024: 1 · 2023: 3 · 2022: 6 · 2021: 7 · 2020: 5 · 2019: 8 · 2018: 5 · 2017: 4 · 2016: 10 · 2015: 5 · 2014: 7 · 2013: 5 · 2012: 5
FWCI
0.79
Type
journal article
Language
en
Open access
closed
Locations
  • Drug Metabolism Reviews (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Pharmacology, Toxicology and Pharmaceutics › Pharmacology › Pharmacogenetics and Drug Metabolism
  • Health Sciences › Medicine › Oncology › Drug Transport and Resistance Mechanisms
  • Life Sciences › Pharmacology, Toxicology and Pharmaceutics › Pharmaceutical Science › Drug Solubulity and Delivery Systems
Keywords
intestinal first-pass metabolism, CYP3A4, CYP3A substrates, UDP-glucuronosyltransferase, species differences, preclinical animal models, UGT1A10, UGT1A8, UGT1A7, raloxifene, baicalein, bioavailability, pharmacokinetics
MeSH terms
Animals, Humans, Intestines, Pharmacokinetics, Species Specificity, Substrate Specificity, Glucuronosyltransferase, Gene Expression Regulation, Enzymologic, Cytochrome P-450 CYP3A

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