Title
Quantitative structure activity relationship studies on the flavonoid mediated inhibition of multidrug resistance proteins 1 and 2
Author
van Zanden, J.J.
Wortelboer, H.M.
Bijlsma, S.
Punt, A.
Usta, M.
Bladeren, P.J.V.
Rietjens, I.M.C.M.
Cnubben, N.H.P.
TNO Kwaliteit van Leven
Publication year
2005
Abstract
In the present study, the effects of a large series of flavonoids on multidrug resistance proteins (MRPs) were studied in MRP1 and MRP2 transfected MDCKII cells. The results were used to define the structural requirements of flavonoids necessary for potent inhibition of MRP1- and MRP2-mediated calcein transport in a cellular model. Several of the methoxylated flavonoids are among the best MRP1 inhibitors (IC50 values, ranging between 2.7 and 14.3 μM) followed by robinetin, myricetin and quercetin (IC50 values ranging between 13.6 and 21.8 μM). Regarding inhibition of MRP2 activity especially robinetin and myricetin appeared to be good inhibitors (IC 50 values of 15.0 and 22.2 μM, respectively). Kinetic characterization revealed that the two transporters differ marginally in the apparent Km for the substrate calcein. For one flavonoid, robinetin, the kinetics of inhibition were studied in more detail and revealed competitive inhibition with respect to calcein, with apparent inhibition constants of 5.0 μM for MRP1 and 8.5 μM for MRP2. For inhibition of MRP1, a quantitative structure activity relationship (QSAR) was obtained that indicates three structural characteristics to be of major importance for MRP1 inhibition by flavonoids: the total number of methoxylated moieties, the total number of hydroxyl groups and the dihedral angle between the B- and C-ring. Regarding MRP2 mediated calcein efflux inhibition, only the presence of a flavonol B-ring pyrogallol group seems to be an important structural characteristic. Overall, this study provides insight in the structural characteristics involved in MRP inhibition and explores the differences between inhibitors of these two transporters, MRP1 and MRP2. Ultimately, MRP2 displays higher selectivity for flavonoid type inhibition than MRP1. © 2004 Elsevier Inc. All rights reserved.
Subject
Nutrition Pharmacology
Analytical research
Calcein
Flavonoids
MRP1
MRP2
QSAR
3 hydroxyflavone
3' hydroxyflavone
3',4' dihydroxyflavone
3,3' dihydroxyflavone
3,3',4' trihydroxyflavone
4' hydroxyflavone
5,7,3',4' tetramethoxyflavone
acacetin
apigenin
baicalein
catechin
chrysin
fisetin
flavone
flavonoid
galangin
kaempferide
kaempferol
luteolin
morin
multidrug resistance protein 1
multidrug resistance protein 2
myricetin
naringenin
protein inhibitor
quercetin
robinetin
taxifolin
unclassified drug
unindexed drug
valspodar
verlukast
animal cell
article
cell kinetics
cell transport
controlled study
drug effect
drug inhibition
drug potency
drug selectivity
genetic transfection
IC 50
nonhuman
priority journal
protein analysis
quantitative structure activity relation
Animals
Cell Line
Dogs
Flavonoids
Fluoresceins
Membrane Transport Modulators
Membrane Transport Proteins
Multidrug Resistance-Associated Proteins
Quantitative Structure-Activity Relationship
To reference this document use:
http://resolver.tudelft.nl/uuid:35814f32-96fb-4c70-baf5-360d81f16769
DOI
https://doi.org/10.1016/j.bcp.2004.11.002
TNO identifier
238347
ISSN
0006-2952
Source
Biochemical Pharmacology, 69 (4), 699-708
Document type
article