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  • Rodent blood-stage Plasmodium survive in dendritic cells that infect naive mice

    Author(s)
    Wykes, MN
    Kay, JG
    Manderson, A
    Liu, XQ
    Brown, DL
    Richard, DJ
    Wipasa, J
    Jiang, SH
    Jones, MK
    Janse, CJ
    Waters, AP
    Pierce, SK
    Miller, LH
    Stow, JL
    Good, MF
    Griffith University Author(s)
    Good, Michael F.
    Year published
    2011
    Metadata
    Show full item record
    Abstract
    Plasmodium spp. parasites cause malaria in 300 to 500 million individuals each year. Disease occurs during the blood-stage of the parasite's life cycle, where the parasite is thought to replicate exclusively within erythrocytes. Infected individuals can also suffer relapses after several years, from Plasmodium vivax and Plasmodium ovale surviving in hepatocytes. Plasmodium falciparum and Plasmodium malariae can also persist after the original bout of infection has apparently cleared in the blood, suggesting that host cells other than erythrocytes (but not hepatocytes) may harbor these blood-stage parasites, thereby assisting ...
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    Plasmodium spp. parasites cause malaria in 300 to 500 million individuals each year. Disease occurs during the blood-stage of the parasite's life cycle, where the parasite is thought to replicate exclusively within erythrocytes. Infected individuals can also suffer relapses after several years, from Plasmodium vivax and Plasmodium ovale surviving in hepatocytes. Plasmodium falciparum and Plasmodium malariae can also persist after the original bout of infection has apparently cleared in the blood, suggesting that host cells other than erythrocytes (but not hepatocytes) may harbor these blood-stage parasites, thereby assisting their escape from host immunity. Using blood stage transgenic Plasmodium berghei-expressing GFP (PbGFP) to track parasites in host cells, we found that the parasite had a tropism for CD317+ dendritic cells. Other studies using confocal microscopy, in vitro cultures, and cell transfer studies showed that blood-stage parasites could infect, survive, and replicate within CD317+ dendritic cells, and that small numbers of these cells released parasites infectious for erythrocytes in vivo. These data have identified a unique survival strategy for blood-stage Plasmodium, which has significant implications for understanding the escape of Plasmodium spp. from immune-surveillance and for vaccine development.
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    Journal Title
    Proceedings of the National Academy of Sciences
    Volume
    108
    Issue
    27
    DOI
    https://doi.org/10.1073/pnas.1108579108
    Subject
    Infectious agents
    Publication URI
    http://hdl.handle.net/10072/44612
    Collection
    • Journal articles

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