Analysis of the genetic variability of PvMSP-3α among Plasmodium vivax in Brazilian field isolates
Mem. Inst. Oswaldo Cruz
; 106(supl.1): 27-33, Aug. 2011. ilus, graf, tab
Article
ي En
| LILACS
| ID: lil-597241
المكتبة المسؤولة:
BR1.1
ABSTRACT
Reliable molecular markers are essential for a better understanding of the molecular epidemiology of Plasmodium vivax, which is a neglected human malaria parasite. The aim of this study was to analyze the genetic diversity of P. vivax isolates from the Brazilian Amazon using polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) analysis of the highly polymorphic merozoite surface protein-3alpha (PvMSP-3α) gene. To accomplish this, 60 isolates of P. vivax from different endemic areas in the Brazilian Amazon were collected. The PvMSP-3α gene was amplified by nested-PCR. Three major types of the PvMSP-3α locus were detected at different frequencies type A (68 percent), B (15 percent) and C (17 percent). A single sample showed two PCR fragments, which corresponded to infection with types A and C. PCR-RFLP analysis using the HhaI restriction enzyme for 52 isolates clearly identified 11 haplotypes, eight of which were from type A, two from type B and only one from type C. Seven other isolates did not show a clear pattern using PCR-RFLP. This result might be due to multiple clone infections. This study showed a high diversity of the PvMSP-3α gene among P. vivax isolates from the Brazilian Amazon, but also indicated that the detection performance of PCR-RFLP of the PvMSP-3α gene may not be sufficient to detect multiple clone infections.
Key words
النص الكامل:
1
الفهرس:
LILACS
الموضوع الرئيسي:
Plasmodium vivax
/
Genetic Variation
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Protozoan Proteins
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Antigens, Protozoan
المحددات:
Humans
البلد/الأقليم حسب الموضوع:
America do sul
/
Brasil
اللغة:
En
مجلة:
Mem. Inst. Oswaldo Cruz
موضوع المجلة:
MEDICINA TROPICAL
/
PARASITOLOGIA
السنة:
2011
نوع:
Article
/
Project document