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  • Characterization of the Antibody Response against Plasmodium falciparum Erythrocyte Membrane Protein 1 in Human Volunteers

    Author(s)
    Krause, Darren R.
    Gatton, Michelle L.
    Frankland, Sarah
    Eisen, Damon P.
    Good, Michael F.
    Tilley, Leann
    Cheng, Qin
    Griffith University Author(s)
    Good, Michael F.
    Year published
    2007
    Metadata
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    Abstract
    The immune response against the Plasmodium falciparum variant surface antigen P. falciparum erythrocyte membrane protein 1 (PfEMP1) is a key component of clinical immunity against falciparum malaria. In this study, we used sera from human volunteers who had been infected with the P. falciparum 3D7 strain to investigate the development, specificity, and dynamics of anti-PfEMP1 antibodies measured against six different strain 3D7 Duffy binding-like domain 1{alpha} (DBL1{alpha}) fusion proteins. We observed that a parasitemia of 20 to 200 infected erythrocytes per 嬠was required to trigger an antibody response to DBL1{alpha} and ...
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    The immune response against the Plasmodium falciparum variant surface antigen P. falciparum erythrocyte membrane protein 1 (PfEMP1) is a key component of clinical immunity against falciparum malaria. In this study, we used sera from human volunteers who had been infected with the P. falciparum 3D7 strain to investigate the development, specificity, and dynamics of anti-PfEMP1 antibodies measured against six different strain 3D7 Duffy binding-like domain 1{alpha} (DBL1{alpha}) fusion proteins. We observed that a parasitemia of 20 to 200 infected erythrocytes per 嬠was required to trigger an antibody response to DBL1{alpha} and that antibodies against one DBL1{alpha} variant cross-react with other DBL1{alpha} variants. Both serum and purified immunoglobulin Gs (IgGs) were able to agglutinate infected erythrocytes, and purified anti-DBL1{alpha} IgGs bound to the live infected red blood cell surface in a punctate surface pattern, confirming that the IgGs recognize native PfEMP1. Analysis of sera from tourists naturally infected with P. falciparum suggests that the anti-PfEMP1 antibodies often persisted for more than 100 days after a single infection. These results help to further our understanding of the development of acquired immunity to P. falciparum infections.
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    Journal Title
    Infection and Immunity
    Volume
    75
    Issue
    12
    DOI
    https://doi.org/10.1128/IAI.00327-07
    Subject
    Clinical Sciences not elsewhere classified
    Biological Sciences
    Agricultural and Veterinary Sciences
    Medical and Health Sciences
    Publication URI
    http://hdl.handle.net/10072/54990
    Collection
    • Journal articles

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