Plasmodium falciparum transmission stages accumulate in the human bone marrow.

Plasmodium falciparum transmission stages accumulate in the human bone marrow.
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DOI:
10.1126/scitranslmed.3008882
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发表时间:
2014-07-09
影响因子:
17.1
通讯作者:
Marti M
Marti M
中科院分区:
医学1区
文献类型:
--
作者:
Joice R;Nilsson SK;Montgomery J;Dankwa S;Egan E;Morahan B;Seydel KB;Bertuccini L;Alano P;Williamson KC;Duraisingh MT;Taylor TE;Milner DA;Marti M

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恶性疟疾寄生虫的传播需要配子体的形成和发育,但除了最成熟的这些性寄生虫形式外,所有这些形式都没有出现在血液循环中。我们在致命性疟疾的儿科病例中进行了系统的器官调查,以表征人类宿主配子体发育的空间动力学。组织学研究显示,在人类骨髓的血管外空间中有一个壁龛,在那里配子细胞在红系前体细胞中形成,并在重新进入循环之前经历发育。在人类骨髓的造血系统中,配子细胞的积累并不像隔离无性阶段的寄生虫那样依赖于细胞对血管的黏附。这表明了另一种隔离配子体的机制,这种机制可能被用来阻止疟疾的传播。
Transmission of Plasmodium falciparum malaria parasites requires formation and development of gametocytes, yet all but the most mature of these sexual parasite forms are absent from the blood circulation. We performed a systematic organ survey in pediatric cases of fatal malaria to characterize the spatial dynamics of gametocyte development in the human host. Histological studies revealed a niche in the extravascular space of the human bone marrow where gametocytes formed in erythroid precursor cells and underwent development before reentering the circulation. Accumulation of gametocytes in the hematopoietic system of human bone marrow did not rely on cytoadherence to the vasculature as does sequestration of asexual-stage parasites. This suggests a different mechanism for the sequestration of gametocytes that could potentially be exploited to block malaria transmission.
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发表时间: 2013-04-01
影响因子: 3.4
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