Braine, Belgium
Braine, Belgium

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PubMed | a UCB Biopharma SPRL
Type: Journal Article | Journal: Xenobiotica; the fate of foreign compounds in biological systems | Year: 2016

1.Carbamazepine is an antiepileptic drug which is metabolized by CYP3A4 into carbamazepine-10,11-epoxide. This metabolite is then detoxified by epoxide hydrolase. As carbamazepine-10,11-epoxide has been associated with neurotoxicity, it is critical to identify whether a new antiepileptic drug has the potential to inhibit epoxide hydrolase and therefore increase carbamazepine-10,11-epoxide plasma levels. 2.In this study, an in vitro assay was developed to evaluate epoxide hydrolase activity by using carbamazepine-10,11-epoxide as probe substrate. The ability of this assay to predict drug-drug interactions (DDI) at the epoxide hydrolase level was also investigated. 3.To this aim, known inhibitors of epoxide hydrolase for which in vivo data are available were used. Firstly, carbamazepine-10,11-epoxide hydrolase activity was determined in liver microsomes, cytosol and hepatocytes. Thereafter, the IC

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