PMID: 9004453Dec 1, 1996Paper

Inhibition of tolbutamide 4-methylhydroxylation by a series of non-steroidal anti-inflammatory drugs in V79-NH cells expressing human cytochrome P4502C10

Xenobiotica; the Fate of Foreign Compounds in Biological Systems
W A KappersG J Horbach

Abstract

1. To study the role of cytochrome P4502C10 in the metabolism of the non-steroidal antiinflammatory drugs (NSAIDs) diclofenac, phenylbutazone, fenoprofen, ibuprofen, flurbiprofen, ketoprofen and naproxen, a cell line was developed stably expressing CYP2C10 cDNA. A retroviral vector construct, containing a human CYP2C10 cDNA, was transfected in V79-NH Chinese hamster lung cells by calcium phosphate co-precipitation. Sublines stably expressing human cytochrome P450 cDNA were established by selection with the neomycin analogue G418. 2. Enzymatic activity of CYP2C10 was detected by 4-methylhydroxylation of tolbutamide. This activity was inhibited to background levels by preincubation with the CYP2C9/10 inhibitor sulphaphenazole. 3. Preincubations with the NSAIDs ketoprofen, phenylbutazone, flurbiprofen and diclofenac (all 250 microM) caused a decrease in 4-methylhydroxylation of tolbutamide (500 microM), significantly different from control values (p < 0.05). Inhibition of this activity was not seen in preincubations with the NSAIDs fenoprofen, ibuprofen and naproxen (250 microM). 4. The V79-NH CYP2C10 cell line we have developed has been shown to be a useful tool to predict drug-drug interactions.

References

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Citations

Dec 1, 1998·Toxicology in Vitro : an International Journal Published in Association with BIBRA·M MonshouwerA S van Miert
May 23, 1998·Journal of Veterinary Pharmacology and Therapeutics·W M Zweers-ZeilmakerR F Witkamp

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