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Red blood cell tension protects against severe malaria in the Dantu blood group

机译:红细胞张力可防止丹图血集团的严重疟疾

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摘要

The rare blood group Dantu is known to protect against severe malaria, and a mechanism is proposed here: Dantu red blood cells have a high membrane tension that prevents invasion by malaria parasites.Malaria has had a major effect on the human genome, with many protective polymorphisms-such as the sickle-cell trait-having been selected to high frequencies in malaria-endemic regions(1,2). The blood group variant Dantu provides 74% protection against all forms of severe malaria in homozygous individuals(3-5), a similar degree of protection to that afforded by the sickle-cell trait and considerably greater than that offered by the best malaria vaccine. Until now, however, the protective mechanism has been unknown. Here we demonstrate the effect of Dantu on the ability of the merozoite form of the malaria parasitePlasmodium falciparumto invade red blood cells (RBCs). We find that Dantu is associated with extensive changes to the repertoire of proteins found on the RBC surface, but, unexpectedly, inhibition of invasion does not correlate with specific RBC-parasite receptor-ligand interactions. By following invasion using video microscopy, we find a strong link between RBC tension and merozoite invasion, and identify a tension threshold above which invasion rarely occurs, even in non-Dantu RBCs. Dantu RBCs have higher average tension than non-Dantu RBCs, meaning that a greater proportion resist invasion. These findings provide both an explanation for the protective effect of Dantu, and fresh insight into why the efficiency ofP. falciparuminvasion might vary across the heterogenous populations of RBCs found both within and between individuals.
机译:众所周知,罕见的血液组甘蓝用于防止严重的疟疾,这里提出了一种机制:丹田红细胞具有高膜张力,可防止疟疾寄生虫患者对人类基因组有重大影响,具有许多保护性多态性 - 例如被选中到疟疾 - 地方性区域(1,2)中的高频频率。血液组变异DATTU对纯合体(3-5)的所有形式的严重疟疾进行74%,对镰状细胞特征提供相似程度的保护程度,比最好的疟疾疫苗提供的程度相似。然而,直到现在,保护机制已经未知。在这里,我们展示了DANTU对MEROZOITE形式的疟疾寄生虫FALCIPARUMTO侵入红细胞(RBC)的能力的影响。我们发现DATTU与RBC表面上发现的蛋白质的曲目的大量变化有关,但出乎意料地,侵袭抑制与特定的RBC-寄生虫受体 - 配体相互作用不相关。通过使用视频显微镜进行侵袭,我们在RBC张力和MEROZOITE入侵之间找到了一个强大的联系,并识别上述侵入阈值,即使在非DATTU RBC中也是很少发生的侵袭。 DANTU RBCS的平均张力高于非DATTU RBC,这意味着更大的比例抗蚀剂入侵。这些发现提供了对DATUU的保护作用和新洞察力的解释,以及对PP的效率的新洞察力。 Falciparumevasion可能因个人内部和之间发现的RBC的异质群体而异。

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  • 来源
    《Nature》 |2020年第7826期|579-583|共5页
  • 作者单位

    KEMRI Wellcome Trust Res Programme Dept Epidemiol & Demog Kilifi Kenya;

    Wellcome Sanger Inst Wellcome Genome Campus Cambridge England;

    Univ Cambridge Cavendish Lab Cambridge England;

    Univ Cambridge Cambridge Inst Med Res Sch Clin Med Cambridge England;

    Univ Cambridge Cavendish Lab Cambridge England;

    KEMRI Wellcome Trust Res Programme Dept Epidemiol & Demog Kilifi Kenya;

    KEMRI Wellcome Trust Res Programme Dept Epidemiol & Demog Kilifi Kenya;

    KEMRI Wellcome Trust Res Programme Dept Epidemiol & Demog Kilifi Kenya;

    KEMRI Wellcome Trust Res Programme Dept Epidemiol & Demog Kilifi Kenya;

    Univ Cambridge Cavendish Lab Cambridge England;

    Wellcome Sanger Inst Wellcome Genome Campus Cambridge England;

    Univ Edinburgh Inst Immunol & Infect Res Sch Biol Sci Edinburgh Midlothian Scotland;

    Univ Oxford Wellcome Ctr Human Genet Oxford England;

    Wellcome Sanger Inst Wellcome Genome Campus Cambridge England|Univ Oxford Big Data Inst Oxford England;

    Univ Cambridge Cambridge Inst Med Res Sch Clin Med Cambridge England;

    Univ Cambridge Cavendish Lab Cambridge England;

    KEMRI Wellcome Trust Res Programme Dept Epidemiol & Demog Kilifi Kenya|Imperial Coll London Inst Global Hlth Innovat London England|Imperial Coll London Dept Infect Dis London England;

    Wellcome Sanger Inst Wellcome Genome Campus Cambridge England|Univ Cambridge Cambridge Inst Med Res Sch Clin Med Cambridge England;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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  • 正文语种 eng
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