[EN] QUINOLINE COMPOUNDS CONTAINING A DIBEMETHIN GROUP<br/>[FR] COMPOSÉS DE QUINOLÉINE CONTENANT UN GROUPE DIBÉMÉTHINE
申请人:UNIV CAPE TOWN
公开号:WO2010018555A4
公开(公告)日:2010-09-10
Quinoline Antimalarials Containing a Dibemethin Group Are Active against Chloroquinone-Resistant <i>Plasmodium falciparum</i> and Inhibit Chloroquine Transport via the <i>P. falciparum</i> Chloroquine-Resistance Transporter (PfCRT)
作者:Vincent K. Zishiri、Mukesh C. Joshi、Roger Hunter、Kelly Chibale、Peter J. Smith、Robert L. Summers、Rowena E. Martin、Timothy J. Egan
DOI:10.1021/jm2009698
日期:2011.10.13
A series of 4-amino-7-chloroquinolines with dibenzylmethylamine (dibemethin) side chains were shown to inhibit synthetic hemozoin formation. These compounds were equally active against cultures of chloroquine-sensitive (D10) and chloroquine-resistant (K1) Plasmodium falciparum. The most active compound had an IC50 value comparable to that of chloroquine, and its potency was undiminished when tested in three additional chloroquine-resistant strains. The three most active compounds exhibited little or no cytotoxicity in a mammalian cell line. When tested in vivo against mouse malaria via oral administration, two of the dibemethin derivatives reduced parasitemia by over 99%, with mice treated at 100 mg/kg surviving the full length of the experiment. Three of the compounds were also shown to inhibit chloroquine transport via the parasite's chloroquine-resistance transporter (PfCRT) in a Xenopus oocyte expression system. This constitutes the first example of a dual-function antimalarial for which the ability to inhibit both hemozoin formation and PfCRT has been demonstrated directly.