A whole cell pathway screen reveals seven novel chemosensitizers to combat chloroquine resistant malaria

Ch'ng, Jun-Hong and Mok, Sachel and Bozdech, Zbynek and Lear, Martin James and Boudhar, Aicha and Russell, Bruce and Nosten, Francois and Tan, Kevin Shyong-Wei (2013) A whole cell pathway screen reveals seven novel chemosensitizers to combat chloroquine resistant malaria. Scientific Reports, 3 (1734). ISSN 2045-2322

Full content URL: http://dx.doi.org/10.1038/srep01734

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A whole cell pathway screen reveals seven novel chemosensitizers to combat chloroquine resistant malaria
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Abstract

Due to the widespread prevalence of resistant parasites, chloroquine (CQ) was removed from front-line
antimalarial chemotherapy in the 1990s despite its initial promise of disease eradication. Since then,
resistance-conferring mutations have been identified in transporters such as the PfCRT, that allow for the
efflux of CQ from its primary site of action, the parasite digestive vacuole. Chemosensitizing/
chemoreversing compounds interfere with the function of these transporters thereby sensitizing parasites to
CQ once again. However, compounds identified thus far have disappointing in vivo efficacy and screening for alternative candidates is required to revive this strategy. In this study, we propose a simple and direct means to rapidly screen for such compounds using a fluorescent-tagged CQ molecule. When this screen was applied to a small library, seven novel chemosensitizers (octoclothepin, methiothepin, metergoline, loperamide, chlorprothixene, L-703,606 and mibefradil) were quickly elucidated, including two which showed greater potency than the classical chemosensitizers verapamil and desipramine.

Keywords:phenotypic screening, parasitology, High-throughput, cell death, fluorescent-tagged drug probes
Subjects:F Physical Sciences > F165 Biomolecular Chemistry
C Biological Sciences > C111 Parasitology
F Physical Sciences > F163 Bio-organic Chemistry
C Biological Sciences > C500 Microbiology
Divisions:College of Science > School of Chemistry
ID Code:17101
Deposited On:17 Apr 2015 08:54

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