Differential drug-induced mRNA expression of human CYP3A4 compared to CYP3A5, CYP3A7 and CYP3A43.

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Krusekopf S, Roots I, Kleeberg U

Differential drug-induced mRNA expression of human CYP3A4 compared to CYP3A5, CYP3A7 and CYP3A43.

Eur J Pharmacol. 2003 Apr 11;466(1-2):7-12. doi: 10.1016/s0014-2999(03)01481-x.

PubMed ID

12679136 [ View in PubMed

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Abstract

Drug-mediated regulation of mRNA expression of all members of the cytochrome P450 3A (CYP3A) subfamily has been measured by reverse transcription-polymerase chain reaction (RT-PCR) in the human hepatocellular carcinoma cell line, HepG2. Transcriptional regulation was proved by inhibition of induction with actinomycin D. Besides the positive control dexamethasone, the H(+)/K(+)-ATPase inhibitors omeprazole, lansoprazole, pantoprazole, and rabeprazole, and the herbal antidepressant St. John's wort (Hypericum extract) were studied. All CYP3A mRNAs were induced by dexamethasone. CYP3A4 was the only CYP3A isoform that was induced by all of the four benzimidazole derivatives, while CYP3A5, CYP3A7, and CYP3A43 were unaffected or even slightly downregulated by these drugs. St. John's wort also increased CYP3A4 mRNA exclusively, leaving CYP3A5 and CYP3A43 unaffected, whereas CYP3A7 was decreased. Depending on the inducer, expression of CYP3A4 is differently regulated from CYP3A5, CYP3A7, and CYP3A43.

DrugBank Data that Cites this Article

Drug Enzymes

Drug	Enzyme	Kind	Organism	Pharmacological Action	Actions
Dexamethasone	Cytochrome P450 3A43	Protein	Humans	Unknown	Inducer	Details
Dexamethasone acetate	Cytochrome P450 3A43	Protein	Humans	Unknown	Inducer	Details