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首页> 外文期刊>Parasitology >Quantification of Plasmodium falciparum malaria from complex infections in the Peruvian Amazon using quantitative PCR of the merozoite surface protein 1, block 2 (PfMSP1-B2): In vitro dynamics reveal density-dependent interactions
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Quantification of Plasmodium falciparum malaria from complex infections in the Peruvian Amazon using quantitative PCR of the merozoite surface protein 1, block 2 (PfMSP1-B2): In vitro dynamics reveal density-dependent interactions

机译:使用裂殖子表面蛋白1区域2(PfMSP1-B2)的定量PCR对秘鲁亚马逊河中复杂感染的恶性疟原虫疟疾进行定量:体外动力学揭示了密度依赖性相互作用

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摘要

The majority of Plasmodium falciparum field isolates are defined as complex infections because they contain multiple genetically distinct clones. Studying interactions between clones in complex infections in vivo and in vitro could elucidate important phenomena in malaria infection, transmission and treatment. Using quantitative PCR (qPCR) of the P. falciparum merozoite surface protein 1, block 2 (PfMSP1-B2), we provide a sensitive and efficient genotyping method. This is important for epidemiological studies because it makes it possible to study genotype-specific growth dynamics. We compared 3 PfMSP1-B2 genotyping methods by analysing 79 field isolates from the Peruvian Amazon. In vivo observations from other studies using these techniques led to the hypothesis that clones within complex infections interact. By co-culturing clones with different PfMSP1-B2 genotypes, and measuring parasitaemia using qPCR, we found that suppression of clonal expansion was a factor of the collective density of all clones present in a culture. PfMSP1-B2 qPCR enabled us to find in vitro evidence for parasite-parasite interactions and could facilitate future investigations of growth trends in naturally occurring complex infections.
机译:由于大多数恶性疟原虫野外分离株含有多个遗传上不同的克隆,因此它们被定义为复杂感染。研究体内和体外复杂感染中克隆之间的相互作用可以阐明疟疾感染,传播和治疗中的重要现象。使用定量PCR(qPCR)的恶性疟原虫裂殖子表面蛋白1,块2(PfMSP1-B2),我们提供了一种灵敏而有效的基因分型方法。这对于流行病学研究很重要,因为它使研究基因型特定的生长动力学成为可能。我们通过分析来自秘鲁亚马逊的79种田间分离株,比较了3种PfMSP1-B2基因分型方法。使用这些技术进行的其他研究在体内的观察结果得出这样的假说,即复杂感染中的克隆相互作用。通过共培养具有不同PfMSP1-B2基因型的克隆,并使用qPCR测量寄生虫血症,我们发现抑制克隆扩增是培养物中存在的所有克隆的集体密度的一个因素。 PfMSP1-B2 qPCR使我们能够找到寄生虫-寄生虫相互作用的体外证据,并可能有助于将来对自然发生的复杂感染的生长趋势进行调查。

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