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Abstract The purpose of this study was to thoroughly characterize the efflux transporters involved in the intestinal permeability of the oral microtubule polymerization inhibitor colchicine and to evaluate the role of these transporters in limiting its oral absorption. The effects of...
Abstract The UDP-glucuronosyltransferase (UGT) 1A9 has been shown to play an important role in the detoxification of several carcinogens and clearance of anticancer and pain medications. The goal of the present study was to identify novel polymorphisms in UGT1A9 and characterize their effect on...
Abstract Multidrug resistance-associated protein (MRP) 3/ ABCC3 and MRP4/ ABCC4 are ATP-binding cassette (ABC) transporters expressed in the sinusoidal membrane of hepatocytes. The purpose of the present study was to establish organic anion-transporting polypeptide (OATP) 1B1/MRP2/MRP3 and...
Abstract CYP2B6 plays an important role in metabolizing various drugs in common clinical use. Increasing interest in CYP2B6 genetic polymorphism was stimulated by revelations of a specific CYP2B6 genotype significantly affecting the metabolism of efavirenz, an anti-HIV type-1 agent. The present...
Abstract Milnacipran (Savella) inhibits both norepinephrine and serotonin reuptake and is distinguished by a nearly 3-fold greater potency in inhibiting norepinephrine reuptake in vitro compared with serotonin. We evaluated the ability of milnacipran to inhibit and induce human cytochrome P450...
Abstract Leflunomide is a disease-modifying antirheumatic drug used for the treatment of rheumatoid arthritis (RA). Cytochromes P450, mainly CYP1A2 and CYP2C19, may be involved in the transformation of leflunomide to leflunomide metabolite (A77 1726, 2-cyano-3-hydroxy- N...
Abstract The mechanism by which the recreational drug (±)-3,4-methylenedioxymethamphetamine (MDMA) destroys brain serotonin (5-HT) axon terminals is not understood. Recent studies have implicated MDMA metabolites, but their precise role remains unclear. To further evaluate the relative...
Abstract Mammalian flavin-containing monooxygenase (FMO) enzymes catalyze oxidation at nucleophilic, heteroatom centers and are important for drug, xenobiotic, and endogenous substrate metabolism. In human liver, human FMO3 (hFMO3) is the most abundant FMO isoform and is known to contribute to...
Abstract The dopamine agonist rotigotine was developed for the treatment of Parkinson's disease and restless legs syndrome. Disposition, metabolism, elimination, and absolute bioavailability of rotigotine were determined in six healthy male subjects by using two different forms of administration...
Abstract 3-Methylindole (3MI), a respiratory tract toxicant, can be metabolized by a number of cytochromes P450 (P450), primarily through either dehydrogenation or epoxidation of the indole. In the present study, we assessed the bioactivation of 3MI by recombinant CYP2A13, a human P450...
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