Status of potential PfATP6 molecular markers for artemisinin resistance in Suriname.

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.

journal_name

Malar J

journal_title

Malaria journal

authors

Adhin MR,Labadie-Bracho M,Vreden SG

doi

10.1186/1475-2875-11-322

subject

Has Abstract

pub_date

2012-09-11 00:00:00

pages

322

issn

1475-2875

pii

1475-2875-11-322

journal_volume

11

pub_type

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