Marked impact of P-glycoprotein on the absorption of TAK-427 in rats
The role of P‐glycoprotein (P‐gp, ABCB1) on the absorption process was investigated by drug–drug interaction studies of TAK‐427 with P‐gp inhibitors (erythromycin, ketoconazole or quinidine) in rats and by transport studies using rat multidrug resistance (MDR1) stably expressing cells and rat small...
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Published in | Biopharmaceutics & drug disposition Vol. 29; no. 6; pp. 311 - 323 |
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Main Authors | , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Chichester, UK
John Wiley & Sons, Ltd
01.09.2008
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Subjects | |
Online Access | Get full text |
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Summary: | The role of P‐glycoprotein (P‐gp, ABCB1) on the absorption process was investigated by drug–drug interaction studies of TAK‐427 with P‐gp inhibitors (erythromycin, ketoconazole or quinidine) in rats and by transport studies using rat multidrug resistance (MDR1) stably expressing cells and rat small intestine mounted in a Ussing‐type chamber. TAK‐427 showed high efflux activity with low permeability in rat MDR1a and MDR1b stably expressing cells and was revealed to be a typical substrate for P‐gps. Although TAK‐427 was mainly absorbed from the small intestine in rats, a large part of the dosed compound remained in the gastrointestinal tract. Orally co‐administered P‐gp inhibitors (50 mg/kg) increased the AUC of TAK‐427 after a 5 mg/kg oral dose 5.4‐ to 18.3‐fold, whereas orally administered P‐gp inhibitors had a minor effect on the increase in the AUC of TAK‐427 (1.3‐ to 2.2‐fold) after a 0.5 mg/kg intravenous dose. Thus, the bioavailability of TAK‐427 after oral administration in rats (7.3%) markedly increased when co‐administered with P‐gp inhibitors (28.6–57.6%). Moreover, the transport of TAK‐427 was predominantly secretory throughout the rat small intestine and was inhibited by P‐gp inhibitors. In conclusion, P‐gp can markedly reduce the absorption of a typical P‐gp substrate by its efflux activity throughout the absorption site. Copyright © 2008 John Wiley & Sons, Ltd. |
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Bibliography: | ArticleID:BDD609 istex:8A906DD2FDD94820C16D4B3E420F7926D11E93F1 ark:/67375/WNG-XV8PW6D2-H |
ISSN: | 0142-2782 1099-081X |
DOI: | 10.1002/bdd.609 |