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    The plasma membrane calcium ATPase 4 does not influence parasite levels but partially promotes experimental cerebral malaria during murine blood stage malaria

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    Authors
    Villegas-Mendez, A.
    Stafford, N.
    Haley, M. J.
    Pravitasari, N. E.
    Baudoin, F.
    Ali, Adnan
    Asih, P. B. S.
    Siregar, J. E.
    Baena, Esther
    Syafruddin, D.
    Couper, K. N
    Oceandy, D.
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    Affiliation
    The Lydia Becker Institute of Immunology and Inflammation, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, M13 9PT,ac.oceandy@manchester.ac.uk.
    Issue Date
    2021
    
    Metadata
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    Abstract
    Background: Recent genome wide analysis studies have identified a strong association between single nucleotide variations within the human ATP2B4 gene and susceptibility to severe malaria. The ATP2B4 gene encodes the plasma membrane calcium ATPase 4 (PMCA4), which is responsible for controlling the physiological level of intracellular calcium in many cell types, including red blood cells (RBCs). It is, therefore, postulated that genetic differences in the activity or expression level of PMCA4 alters intracellular Ca2+ levels and affects RBC hydration, modulating the invasion and growth of the Plasmodium parasite within its target host cell. Methods: In this study the course of three different Plasmodium spp. infections were examined in mice with systemic knockout of Pmca4 expression. Results: Ablation of PMCA4 reduced the size of RBCs and their haemoglobin content but did not affect RBC maturation and reticulocyte count. Surprisingly, knockout of PMCA4 did not significantly alter peripheral parasite burdens or the dynamics of blood stage Plasmodium chabaudi infection or reticulocyte-restricted Plasmodium yoelii infection. Interestingly, although ablation of PMCA4 did not affect peripheral parasite levels during Plasmodium berghei infection, it did promote slight protection against experimental cerebral malaria, associated with a minor reduction in antigen-experienced T cell accumulation in the brain. Conclusions: The finding suggests that PMCA4 may play a minor role in the development of severe malarial complications, but that this appears independent of direct effects on parasite invasion, growth or survival within RBCs.
    Citation
    Villegas-Mendez A, Stafford N, Haley MJ, Pravitasari NE, Baudoin F, Ali A, et al. The plasma membrane calcium ATPase 4 does not influence parasite levels but partially promotes experimental cerebral malaria during murine blood stage malaria. Malar J. 2021 Jul 2;20(1).
    Journal
    Malaria Journal
    URI
    http://hdl.handle.net/10541/624484
    DOI
    10.1186/s12936-021-03832-w
    PubMed ID
    34215257
    Additional Links
    https://dx.doi.org/10.1186/s12936-021-03832-w
    Type
    Article
    Language
    en
    ae974a485f413a2113503eed53cd6c53
    10.1186/s12936-021-03832-w
    Scopus Count
    Collections
    All Paterson Institute for Cancer Research

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