Inhibitory effect of valsartan on the intestinal absorption and renal excretion of bestatin in rats.

Abstract:

:Peptidomimetic drugs have favorable bioavailability owing to H(+)/peptide transporter 1 (PEPT1) located in the intestine. Sartans are commonly used and likely coadministered with peptidomimetic drugs in the clinic; however, in vivo interactions between sartans and peptidomimetic drugs have not been systemically understood. Herein, the effect and mechanism of sartans on the intestinal absorption and renal excretion of the dipeptide-like drug bestatin were investigated. Following oral combination with valsartan, the plasma concentration and area under the plasma concentration-time curve of bestatin in rats decreased significantly. Bestatin absorption in rat-everted intestinal sacs was dramatically reduced by valsartan. Sartans exhibited concentration-dependent inhibition on the uptake of bestatin in human PEPT1 (hPEPT1)-HeLa cells. The cumulative urinary excretion and renal clearance of the two drugs in rats decreased after intravenous coadministration. Moreover, decreased uptake of the two drugs was observed in rats' kidney slices and human organic anion transporter (hOAT)1/hOAT3-transfected cells when coadministered. The results suggest that the intestinal absorption and renal excretion of bestatin in rats were inhibited by coadministered valsartan. Interestingly, the half-maximal inhibitory concentration (IC50) values of valsartan for PEPT1 and OAT1/3 were comparable to the theoretically estimated local drug concentration and the clinical unbound concentration, respectively, proposing possible drug-drug interaction in humans via PEPT1 and OAT1/3, which should be paid particular attention when bestatin and valsartan are coadministrated clinically.

journal_name

J Pharm Sci

authors

Huo X,Liu Q,Wang C,Meng Q,Sun H,Peng J,Ma X,Sun P,Liu K

doi

10.1002/jps.23805

subject

Has Abstract

pub_date

2014-02-01 00:00:00

pages

719-29

issue

2

eissn

0022-3549

issn

1520-6017

pii

S0022-3549(15)30703-6

journal_volume

103

pub_type

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