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01.12.2012 | Research | Ausgabe 1/2012 Open Access

Malaria Journal 1/2012

Status of potential Pf ATP6 molecular markers for artemisinin resistance in Suriname

Zeitschrift:
Malaria Journal > Ausgabe 1/2012
Autoren:
Malti R Adhin, Mergiory Labadie-Bracho, Stephen G Vreden
Wichtige Hinweise

Competing interests

The authors declare that they have no competing interests.

Authors’ contributions

MRA conceived of the study and participated in its design and coordination and drafted the manuscript. MLB participated in writing of the manuscript and the laboratory testing. SV participated in the design of the study and aided in the collection of the samples. All authors read and approved the final manuscript.

Abstract

Background

Polymorphisms within the PfATP6 gene have been indicated as potential molecular markers for artemisinin efficacy. Since 2004, the use of artemisinin combination therapy (ACT) was introduced as first-line treatment of the uncomplicated malaria cases in Suriname. The aim of this research was to determine changes in Suriname in the status of the polymorphic markers in the PfATP6 gene before and after the adoption of the ACT-regimen, particularly of the S769N mutation, which was reported to be associated with in vitro Artemether resistance in the neighboring country French Guiana.

Methods

The PfATP6 gene from Plasmodium falciparum parasites in Suriname was investigated in 28 samples using PCR amplification and restriction enzyme analysis, to assess and determine the prevalence of potentially interesting single nucleotide polymorphisms. The polymorphisms [L263E; A623E; S769N], which may be associated with the artemisinin resistant phenotype were characterized in parasites from three endemic regions before and after the adoption of the ACT-regimen. In addition, the status of these molecular markers was compared in paired P. falciparum isolates from patients with recurring malaria after controlled ACT.

Results

All the investigated samples exhibit the wild-type genotype at all three positions; L263, A623, S769.

Conclusion

All investigated isolates before and after the adoption of the ACT-regimen and independent of endemic region harbored the wild-type genotype for the three investigated polymorphisms. The study revealed that decreased artemisinin susceptibility could occur independent from PfATP6 mutations, challenging the assumption that artemisinin resistance is associated with these mutations in the PfATP6 gene.
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