Induction of CYP2C genes in human hepatocytes in primary culture.
Article Details
-
Citation
Copy to clipboard -
Gerbal-Chaloin S, Pascussi JM, Pichard-Garcia L, Daujat M, Waechter F, Fabre JM, Carrere N, Maurel P
Induction of CYP2C genes in human hepatocytes in primary culture.
Drug Metab Dispos. 2001 Mar;29(3):242-51.
- PubMed ID
-
11181490 [View in PubMed]
- Abstract
-
The expression and inducibility of four CYP2C genes, including CYP2C8, -2C9, -2C18, and -2C19, was investigated in primary cultures of human hepatocytes. By the use of RNase protection assay and specific antibodies, each CYP2C mRNA and protein were quantified unequivocally. The four CYP2C mRNAs were expressed in human livers and cultured primary hepatocytes, but only the CYP2C18 protein was not detected. Compounds known to activate the pregnane X receptor (PXR) such as rifampicin, or the constitutively activated receptor (CAR) such as phenobarbital, induced CYP2C8, CYP2C9, and to a lesser extent CYP2C19 mRNAs and proteins. CYP2C18 mRNA was expressed but not inducible. The concentration dependence of CYP2C8 and CYP2C9 mRNAs in response to rifampicin and phenobarbital paralleled that of CYP3A4 and CYP2B6, the maximum accumulation being reached with 10 microM rifampicin and 100 microM phenobarbital. In contrast, dexamethasone produced maximum induction of CYP2C8 and CYP2C9 mRNAs at 0.1 microM while in these conditions neither CYP3A4 nor CYP2B6 was significantly induced. Moreover, the concentration dependence of CYP2C8 and CYP2C9 mRNAs in response to dexamethasone paralleled that of tyrosine aminotransferase. Furthermore, dexamethasone, which has been recently shown to up-regulate PXR and CAR expression through the glucocorticoid receptor, potentiated CYP2C8 and CYP2C9 mRNA induction in response to rifampicin and phenobarbital. Collectively, these results suggest the possible implication of at least three receptors in the regulation of CYP2C8 and CYP2C9 expression, i.e., glucocorticoid receptor, PXR, and/or CAR.
DrugBank Data that Cites this Article
- Drug Enzymes
-
Drug Enzyme Kind Organism Pharmacological Action Actions Dexamethasone Cytochrome P450 2C8 Protein Humans UnknownInducerDetails Dexamethasone acetate Cytochrome P450 2C8 Protein Humans UnknownInducerDetails Phenobarbital Cytochrome P450 2C18 Protein Humans UnknownSubstrateDetails Phenobarbital Cytochrome P450 2C8 Protein Humans UnknownInducerDetails Rifampicin Cytochrome P450 2C8 Protein Humans UnknownInhibitorInducerDetails Secobarbital Cytochrome P450 2C9 Protein Humans UnknownInducerDetails - Drug InteractionsLearn More" title="" id="structured-interactions-info" class="drug-info-popup" href="javascript:void(0);">
-
Drugs Interaction Integrate drug-drug
interactions in your software
Identify potential medication risksEasily compare up to 40 drugs with our drug interaction checker.Get severity rating, description, and management advice.Learn more
