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© Artur Scherf
Scanning Electron Microscopy of Red Blood Cell infected by Plasmodium falciparum.
Publication : The American journal of tropical medicine and hygiene

Polymorphisms in pfcrt, pfmdr1, dhfr genes and in vitro responses to antimalarials in Plasmodium falciparum isolates from Bangui, Central African Republic

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in The American journal of tropical medicine and hygiene - 01 Sep 2006

Menard D, Yapou F, Manirakiza A, Djalle D, Matsika-Claquin MD, Talarmin A

Link to Pubmed [PMID] – 16968910

Am. J. Trop. Med. Hyg. 2006 Sep;75(3):381-7

Drug resistance is probably the greatest challenge to most malaria-control programs. Given the limited resources for other malarial-control measures, rational drug used is crucial. Molecular markers for parasite resistance such as pfcrt, pfmdr-1, and dhfr have the potential to be used in an integrated fashion to provide timely information that is useful to policy makers. Therefore, we evaluated polymorphisms in these genes from Plasmodium falciparum and their association with in vitro antimalarial drug resistance to 135 parasites samples collected in Bangui in 2004. For the dhfr gene, we found a strong association between the dhfr genotype and chemosensitivity to pyrimethamine. For the pfcrt gene, we found that haplotypes with mutant-type alleles led to significant changes in the IC50 values for chloroquine, monodesethylamodiaquine, and quinine. We found no correlations for the pfmdr1 gene. These findings suggest that a regular monitoring and screening for resistance markers for antifolates and for chloroquine could act as an adjunct to in vivo trials.

https://www.ncbi.nlm.nih.gov/pubmed/16968910