Metabolism of Fentanyl and Acetylfentanyl in Human-Induced Pluripotent Stem Cell-Derived Hepatocytes

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<p>To evaluate the capability of human-induced pluripotent stem cell-derived hepatocytes (h-iPS-HEP) in drug metabolism, the profiles of the metabolites of fentanyl, a powerful synthetic opioid, and acetylfentanyl, an N-acetyl analog of fentanyl, in the cells were determined and analyzed. Commercially available h-iPS-HEP were incubated with fentanyl or acetylfentanyl for 24 or 48 h. After enzymatic hydrolysis, the medium was deproteinized with acetonitrile, then analyzed by LC/MS. Desphenethylated metabolites and some hydroxylated metabolites, including 4′-hydroxy-fentanyl and β-hydroxy-fentanyl, were detected as metabolites of fentanyl and acetylfentanyl in the medium. The main metabolite of fentanyl with h-iPS-HEP was the desphenethylated metabolite, which was in agreement with in vivo results. These results suggest that h-iPS-HEP may be useful as a tool for investigating drug metabolism.</p>

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