Journal
AMERICAN JOURNAL OF TROPICAL MEDICINE AND HYGIENE
Volume 77, Issue 6, Pages 1034-1038Publisher
AMER SOC TROP MED & HYGIENE
DOI: 10.4269/ajtmh.2007.77.1034
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The potential role of polymorphisms in the pfcrt and pfmdr1 genes and in vitro susceptibility to amodiaquine and desethylamodiaquine were explored in 15 chloroquine-resistant Colombian Plasmodium falciparum isolates. Single nucleotide polymorphisms in the pfcrt gene, including a newly reported mutation (S334N), were seen in isolates with decreased susceptibility to amodiaquine and desethylamodiaquine. The lowest susceptibility found to amodiaquine was observed in an isolate carrying a pfcrt and pfmdr1 Dd2-like haplotype, whereas a pfcrt haplotype related to the 7G8 Brazilian strain was found in a Colombian isolate with the lowest susceptibility to desethylamodiaquine. This exploratory study suggests that polymorphisms in the pfcrt and pfmdr1 genes play a role in amodiaquine and desethylamodiaquine resistance and warrants further study.
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