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Synthesis and evaluation of dihydropyrroloquinolines that selectively antagonize P-glycoprotein.

Abstract：

:In a search for improved multiple drug resistance (MDR) modulators, we identified a novel series of substituted pyrroloquinolines that selectively inhibits the function of P-glycoprotein (Pgp) without modulating multidrug resistance-related protein 1 (MRP1). These compounds were evaluated for their toxicity toward drug-sensitive tumor cells (i.e. MCF-7, T24) and for their ability to antagonize Pgp-mediated drug-resistant cells (i.e. NCI/ADR) and MRP1-mediated resistant cells (i.e. MCF-7/VP). Cytotoxicity and drug accumulation assays demonstrated that the dihydropyrroloquinolines inhibit Pgp to varying degrees, without any significant inhibition of MRP1. The compound termed PGP-4008 was the most effective at inhibiting Pgp in vitro and was further evaluated in vivo. PGP-4008 inhibited tumor growth in a murine syngeneic Pgp-mediated MDR solid tumor model when given in combination with doxorubicin. PGP-4008 was rapidly absorbed after intraperitoneal administration, with its plasma concentrations exceeding the in vitro effective dose for more than 2 h. PGP-4008 did not alter the plasma distribution of concomitantly administered anticancer drugs and did not cause systemic toxicity as was observed for cyclosporin A. Because of their enhanced selectivity toward Pgp, these substituted dihydropyrroloquinolines may be effective MDR modulators in a clinical setting.

journal_name

J Med Chem

journal_title

Journal of medicinal chemistry

authors

Lee BD,Li Z,French KJ,Zhuang Y,Xia Z,Smith CD

doi

10.1021/jm0303204

keywords:

subject

Has Abstract

pub_date

2004-03-11 00:00:00

pages

1413-22

issue

6

eissn

0022-2623

issn

1520-4804

journal_volume

47

pub_type

杂志文章

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