Cited by 101Pharmacogenetics and Drug MetabolismDrug Transport and Resistance MechanismsDrug-Induced Hepatotoxicity and Protection

COMPARISON OF MOUSE AND RAT CYTOCHROME P450-MEDIATED METABOLISM IN LIVER AND INTESTINE

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Martignoni, Marcella, Groothuis, Geny, de Kanter, Ruben·2006·Drug Metabolism and Disposition

Abstract

The liver is considered to be the major site of first-pass metabolism, but the small intestine is also able to contribute significantly. The improvement of existing in vitro techniques and the development of new ones, such as intestinal slices, allow a better understanding of the intestine as a metabolic organ. In this paper, the formation of metabolites of several human CYP3A substrates by liver and intestinal slices from rat and mouse was compared. The results show that liver slices exhibited a higher metabolic rate for the majority of the studied substrates, but some metabolites were produced at a higher rate by intestinal slices, compared with liver slices. Coincubation with ketoconazole inhibited the metabolic conversion in intestinal slices almost completely, but inhibition was variable in liver slices. To better understand the role of CYP3A in mice, we studied the relative mRNA expression of different CYP3A isoforms in intestine and liver from mice because, in this species, CYP3A expression has not been well described in these organs. It was found that in mice, CYP3A13 is more expressed in the intestine, whereas CYP3A11, CYP3A25, and CYP3A41 are more expressed in the liver, comparable to similar findings in the rat. Altogether, these data demonstrate that, in addition to liver, the intestine from mouse and rat may have an important role in the process of first-pass metabolism, depending on the substrate. Moreover, we show that intestinal slices are a useful in vitro technique to study gut metabolism.

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Crossref · 10.1124/dmd.105.009035

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Authors
Martignoni, M., Groothuis, G., & de Kanter, R.
Affiliations
Nerviano Medical Sciences (IT)
Venue
Drug Metabolism and Disposition
Publisher
Elsevier BV
Published
2006-06
Volume
34
Issue
6
Pages
1047-1054
ISSN
0090-9556 (ISSN-L)
OpenAlex
W2098037006
Cited by
101
References
23
Citations by year
2026: 4 · 2025: 3 · 2024: 4 · 2023: 2 · 2022: 8 · 2021: 5 · 2020: 1 · 2019: 7 · 2018: 8 · 2017: 2 · 2016: 7 · 2015: 6 · 2014: 5 · 2013: 4 · 2012: 7
FWCI
5.13
Type
journal article
Language
en
Open access
Locations
  • Drug Metabolism and Disposition (publishedVersion)
  • PubMed (publishedVersion)
  • University of Groningen research database (University of Groningen / Centre for Information Technology) (submittedVersion, other-oa)
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 › Pharmacology › Drug-Induced Hepatotoxicity and Protection
Keywords
CYP3A, first-pass metabolism, liver slices, CYP3A11, ketoconazole inhibition, mouse-rat comparison, CYP3A substrates, mRNA expression
MeSH terms
Animals, Carbamazepine, Cytochrome P-450 Enzyme System, Enzyme Inhibitors, Hydroxytestosterones, Intestinal Mucosa, Intestines, Ketoconazole, Liver, Male, Membrane Proteins, Mice, Nude, Microsomes, Midazolam, Oxidoreductases, RNA, Messenger, Substrate Specificity, Rats, Sprague-Dawley, Mice, Rats, Cytochrome P-450 CYP3A, Cytochrome P-450 Enzyme Inhibitors, Cytochrome P-450 CYP3A Inhibitors, In Vitro Techniques

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