Genetic profiling of Plasmodium falciparum antigenic biomarkers among asymptomatic pregnant women on intermittent preventive treatment with sulfadoxine-pyrimethamine from southwest Nigeria.

IF 3 2区医学 Q2 DEVELOPMENTAL BIOLOGY Placenta Pub Date : 2024-12-22 DOI:10.1016/j.placenta.2024.12.016

R I Funwei, A Olaleye, G N Uyaiabasi, W Hammed, M M Obadimeji, C J Elikwu, A Adepoju, C Okangba, A Akinyede, O Ojurongbe, C Falade, O Walker

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引用次数: 0

Abstract

Introduction: The genetic complexity of Plasmodium falciparum is contributory to the emergence of drug resistant-parasites. Intermittent preventive treatment of malaria in pregnancy with sulfadoxine-pyrimethamine (IPTp-SP) in malaria endemic settings is recommended by WHO. This study evaluated the prevalence of Plasmodium falciparum multidrug resistance-1 gene (Pfmdr-1), genetic diversity of merozoite surface proteins (msp-1, msp-2) and glutamate-rich protein (glurp) among pregnant women with sub-patent parasitaemia from southwest Nigeria.

Methods: One hundred PCR-confirmed Plasmodium falciparum isolates, collected at first visit-V-1 (n = 52), delivery (n = 31) and cord blood (n = 17), were selected for analysis. The Pfmdr-1 alleles was evaluated using restriction fragment length polymorphism (RLFP), while msp-1, msp-2 and glurp genes were genotyped. Allelic frequency distribution and multiplicity of infection were calculated at p-value ≤0.05.

Results: The Pfmdr-1 (N86/N86Y) combination was detected in 11.8 %, 61.3 % and 58.8 % (p ≤ 0.05) in V-1, Delivery and Cord isolates respectively. The N86Y haplotype was detected only in cord (5.9 %). The allelic frequency distribution for msp-1 was 244 (K1 = 81, MAD20 = 84 and RO33 = 79), and msp-2; 110 alleles, representing 43.6 % (FC27) and 56.4 % (3D7). While glurp expressed 25 alleles, 84 % (V-1), 12 % (delivery) and 4 % (cord), respectively (p ≤ 0.05). The msp-1 and msp-2 recorded higher MOIs than glurp.

Discussion: Genetically diverse P. falciparum strains with Pfmdr-1 mutant alleles were detected in pregnant women with sub-patent parasitaemia in southwest Nigeria, which may reduce IPTp-SP effectiveness. Thus, continuous molecular surveillance of resistant-parasites to sulphadoxine-pyrimethamine and ACTs is essential.

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来源期刊

Placenta 医学-发育生物学

CiteScore

6.30

自引率

10.50%

发文量

391

审稿时长

78 days

期刊介绍： Placenta publishes high-quality original articles and invited topical reviews on all aspects of human and animal placentation, and the interactions between the mother, the placenta and fetal development. Topics covered include evolution, development, genetics and epigenetics, stem cells, metabolism, transport, immunology, pathology, pharmacology, cell and molecular biology, and developmental programming. The Editors welcome studies on implantation and the endometrium, comparative placentation, the uterine and umbilical circulations, the relationship between fetal and placental development, clinical aspects of altered placental development or function, the placental membranes, the influence of paternal factors on placental development or function, and the assessment of biomarkers of placental disorders.