Cellular Pharmacokinetic Aspects of Reversal Effect of Itraconazole on P-Glycoprotein-Mediated Resistance of Anticancer Drugs
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概要
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The reversla effect of itraconazole on P-glycoprotein (P-gp)-mediated resistance of vinblastine, daunorubicin and doxorubicin was analyzed from a cellular pharmacokinetic point of view, namely by [^3H]azidopine photoaffinity labeling, intracellular accumulation and transcellular transport experiments. The LLC-GA5-COL150 cells, which expressed human P-gp selectively on the apical membrane due to transfection of MDR1 cDNA into the porcine kidney epithelial cells (LLC-PK_1 cells), was used here, since this cell line constructs the monolayer with tight junction, being able to characterize the cellular pharmacokinetics. In LLC-GA5-COL150 cells, itraconazole caused a reversal from resistance as shown by a growth inhibition assay. [^3H]Azidopine photoaffinity labeling demonstrated that itraconazole, vinblastine, daunorubicin and doxorubicin showed higher binding ability for P-gp compared with digoxin, suggesting the following results were via P-gp. The intracellular accumulation of [^3H]vinblastine, [^3H]daunorubicin and [^<14>C]doxorubicin after their application on the basal and apical sides was increased by itraconazole. These changes were similar to the dose modifying factors determined by the growth inhibition assay. However, their basal-to-apical transport was hardly affected by itraconazole, and this was explained by the fact that itraconazole inhibited P-gp, and subsequently increased their intracellular concentration and then the non-P-gp mediated transport from the intracellular space to apical side. The apical-to-basal transport of [^3H]vinblastine, [^3H]daunorubicin and [^<14>C]coxorubicin was increased by itraconazole, and this was reasonably explained by the inhibition of P-gp, and partly also by the increase of their intracellular concentration via the inhibition of P-gp.
- 公益社団法人日本薬学会の論文
- 1999-12-15
著者
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TANIGAWARA Yusuke
Department of Pharmacy, School of Medicine, Keio University
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OKUMURA Katsuhiko
Department of Hospital Pharmacy, Kobe University School of Medicine
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SAKAEDA Toshiyuki
Department of Hospital Pharmacy, Kobe University School of Medicine
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Kimura T
Kobe University Graduate School Of Medicine
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Nishiguchi Kohshi
Department of Hospital Pharmacy, School of Medicine, Kobe University
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Takara Kohji
Department of Hospital Pharmacy, Faculty of Pharmaceutical Sciences, Kyoto Pharmaceutical University
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Okumura K
Department Of Clinical Evaluation Of Pharmacotherapy Kobe University Graduate School Of Medicine
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Takara Kohji
Department Of Hospital Pharmacy Faculty Of Pharmaceutical Sciences Kyoto Pharmaceutical University
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Takara Kohji
Department Of Clinical Pharmacy Faculty Of Pharmaceutical Sciences Kyoto Pharmaceutical University
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Takara Kohji
Department Of Hospital Pharmacy School Of Medicine Kobe University
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Sakaeda Toshiyuki
Department Of Hospital Pharmacy Kobe University Hospital
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KOMADA Fusao
Department of Drug Informatics, Faculty of Pharmaceutical Sciences, Josai University
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Shirakawa T
Kobe University School Of Medicine
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Kamiyama Fumio
京都大学再生医科学研究所
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Kodama Fusao
Cosmed Pharmaceutical Co. Ltd.
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Tanigawara Yusuke
Department Of Clinical Pharmacokinetics And Pharmacodynamics School Of Medicine Keio University
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Nishiguchi K
Department Of Hospital Pharmacy Kobe University School Of Medicine
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Nishiguchi Kohshi
Department Of Clinical Pharmacy Faculty Of Pharmaceutical Sciences Kyoto Pharmaceutical University
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Nishiguchi Kohshi
Department Of Hospital Pharmacy School Of Medicine Kobe University
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Okumura Katsuhiko
Department Of Hospital Pharmacy School Of Medicine Kobe University
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Okumura Katsuhiko
Department Of Clinical Evaluation Of Pharmacotherapy Kobe University Graduate School Of Medicine
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Okumura Katsuhiko
Department Of Hospital Pharmacy Kyoto Pharmaceutical University:department Of Hospital Pharmacy Kobe
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Komada F
Department Of Pharmacy Kobe University School Of Medicine
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Nakamura Takeshi
Department Of Gastroenterological Surgery Kobe University Graduate School Of Medical Sciences
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Sakai T
Department Of Internal Medicine And Gastrointestinal Endoscopy Saga Medical School
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Nagahiro Kazumi
Department Of Hospital Pharmacy Kobe University School Of Medicine
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Koishi Tomokazu
Department Of Hospital Pharmacy Faculty Of Pharmaceutical Sciences Kyoto Pharmaceutical University
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