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Science 4 October 2002:
Vol. 298. no. 5591, pp. 210 - 213
DOI: 10.1126/science.1074045
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Reports

Chloroquine Resistance in Plasmodium falciparum Malaria Parasites Conferred by pfcrt Mutations

Amar Bir Singh Sidhu, Dominik Verdier-Pinard, David A. Fidock*

Plasmodium falciparum chloroquine resistance is a major cause of worldwide increases in malaria mortality and morbidity. Recent laboratory and clinical studies have associated chloroquine resistance with point mutations in the gene pfcrt. However, direct proof of a causal relationship has remained elusive and most models have posited a multigenic basis of resistance. Here, we provide conclusive evidence that mutant haplotypes of the pfcrt gene product of Asian, African, or South American origin confer chloroquine resistance with characteristic verapamil reversibility and reduced chloroquine accumulation. pfcrt mutations increased susceptibility to artemisinin and quinine and minimally affected amodiaquine activity; hence, these antimalarials warrant further investigation as agents to control chloroquine-resistant falciparum malaria.

Department of Microbiology and Immunology, Albert Einstein College of Medicine, Bronx, NY 10461, USA.
*   To whom correspondence should be addressed. E-mail: dfidock{at}aecom.yu.edu

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(2002)
Journal Watch Infectious Diseases 2002, 6
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Science 298, 124-126
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