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- W2945927717 abstract "Liver dysfunction reduces systemic clearance of drugs that are primarily eliminated by the liver. However, liver dysfunction can cause a reduction in the plasma concentration profiles of certain drugs, including several tyrosine kinase inhibitors, after oral administration. The aim of the present study was to clarify the reduction in oral absorption of a tyrosine kinase inhibitor, imatinib, and the mechanisms of action involved under conditions of hepatic dysfunction, focusing on intestinal transporters. The maximum plasma concentration of imatinib after oral administration in mice subjected to bile duct ligation (BDL) was lower than that in sham-operated mice, whereas the plasma concentration profile after intravenous administration was essentially unaffected by BDL. The change in maximum plasma concentration was compatible with a reduction in small intestinal permeability of imatinib observed in the in situ closed loop. Gene expression of abcg2 was increased in BDL mice compared with that in sham-operated mice. Expression of breast cancer resistance protein and P-glycoprotein in the small intestinal brush border membrane fraction from BDL mice was also increased compared with that in sham-operated mice. In summary, the intestinal absorption and permeability of imatinib was decreased in BDL mice, and this may be attributed to the up-regulation of the efflux transporter(s)." @default.
- W2945927717 created "2019-05-29" @default.
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- W2945927717 date "2019-09-01" @default.
- W2945927717 modified "2023-09-25" @default.
- W2945927717 title "Bile Duct Obstruction Leads to Increased Intestinal Expression of Breast Cancer Resistance Protein With Reduced Gastrointestinal Absorption of Imatinib" @default.
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- W2945927717 doi "https://doi.org/10.1016/j.xphs.2019.05.017" @default.
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