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Cited by 1,267

The DOI matches its Crossref record; 2 of the 2 references it cites were found in a registry or an index.

CYTOCHROME P-450 3A4: Regulation and Role in Drug Metabolism

Guengerich, F. Peter·1999·Annual Review of Pharmacology and Toxicology

Abstract

▪ Abstract Cytochrome P-450 (P-450) 3A4 is the most abundant P-450 expressed in human liver and small intestine. P-450 3A4 contributes to the metabolism of approximately half the drugs in use today, and variations in its catalytic activity are important in issues of bioavailability and drug-drug interactions. The gene is known to be inducible by barbiturates, glucocorticoids, and rifampicin in humans and in isolated hepatocytes, although the mechanism remains unclear. The 5′-untranslated region includes putative basal transcription element, hepatocyte nuclear factor, p53, AP-3, glucocorticoid regulatory element, pregnane X receptor, and estrogen receptor element sequences. Recently, the GRE element has been shown to act in a classic glucocorticoid response. Several issues remain to be resolved regarding the catalytic activity of the P-450 3A4 protein, including rate-limiting steps and the need for cytochrome b 5, divalent cations, and acidic phospholipid systems for optimal activity. Another issue involves the basis of the homotropic and heterotropic cooperativity seen with the enzyme. The in vivo significance of these findings remains to be further established. In addition to more basic studies on P-450 3A4, several areas of practical interest to the pharmaceutical industry require development.

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Crossref · 10.1146/annurev.pharmtox.39.1.1

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Metadata

Authors
Guengerich, F. P.
Venue
Annual Review of Pharmacology and Toxicology
Published
1999-04
Volume
39
Issue
1
Pages
1-17
ISSN
  • 0362-1642 (ISSN-L)
  • 1545-4304
OpenAlex
W2127059331
Cited by
1,267
References
2
FWCI
4.14
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: CYTOCHROME P-450 3A4: Regulation and Role in Drug Metabolism. https://app.cochat.ai/papers/10.1146/annurev.pharmtox.39.1.1
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Guengerich, F. P. (1999). CYTOCHROME P-450 3A4: Regulation and Role in Drug Metabolism. Annual Review of Pharmacology and Toxicology. https://doi.org/10.1146/annurev.pharmtox.39.1.1

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Bibliographic data: Semantic Scholar, OpenAlex, Crossref.

Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.