Original Paper

Parasitology Research

, Volume 100, Issue 3, pp 487-493

No variation in the prevalence of point mutations in the Pfcrt and Pfmdr1 genes in isolates from Gabonese patients with uncomplicated or severe Plasmodium falciparum malaria

  • Pembe Issamou MayengueAffiliated withMedical Research Unit, Albert Schweitzer HospitalDepartment of Parasitology, Institute for Tropical Medicine, University of Tübingen
  • , Yvonne KalmbachAffiliated withDepartment of Parasitology, Institute for Tropical Medicine, University of Tübingen
  • , Saadou IssifouAffiliated withMedical Research Unit, Albert Schweitzer Hospital
  • , Peter G. KremsnerAffiliated withMedical Research Unit, Albert Schweitzer HospitalDepartment of Parasitology, Institute for Tropical Medicine, University of Tübingen
  • , Francine NtoumiAffiliated withMedical Research Unit, Albert Schweitzer HospitalDepartment of Parasitology, Institute for Tropical Medicine, University of Tübingen Email author 

Rent the article at a discount

Rent now

* Final gross prices may vary according to local VAT.

Get Access

Abstract

In Lambaréné (Gabon), where a high level of Plasmodium falciparum resistance to chloroquine has been reported, we assessed the relationship between polymorphisms in the P. falciparum chloroquine resistance transporter (Pfcrt) and multidrug resistance-1 (Pfmdr1) genes and the clinical severity of malaria. Ninety-one and 60 P. falciparum isolates from children with uncomplicated or severe malaria were collected in 1996 and 2002, respectively. Single nucleotide mutations at codon 76 in the Pfcrt gene and at codons 86, 184, 1034, 1042, and 1246 in the Pfmdr1 gene were assessed by PCR-RFLP. All P. falciparum isolates presented the Pfcrt K76T mutation, whatever the clinical status. A high prevalence (>80%) of the Pfmdr1 86Tyr and 184Phe mutations was detected at both time points and in both clinical groups. We did not identify any specific mutation in the Pfmdr1 gene associated with the severity of disease, and the multiplicity of P. falciparum infection was also similar in both groups. Our results showed no change in the polymorphism of Pfcrt and Pfmdr1 genes in P. falciparum isolates collected in 1996 and 2002, and the severity of the disease was not associated with specific mutations neither in the Pfcrt nor in the Pfmdr1 genes in the study site.