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Cerebral malaria and immunogenetics.

D Mazier1, J Nitcheu, M Idrissa-Boubou

  • 1INSERM U 511, Immunobiologie Cellulaire et Moléculaire des Infections Parasitaires, CHU Pitié-Salpêtrière (Université Paris 6), Paris, France.

Parasite Immunology
|December 21, 2000
PubMed
Summary

Genetic variations in Plasmodium falciparum infected red blood cells influence cerebral malaria severity. Polymorphisms in adhesion molecules and immune response genes show inconsistent associations, highlighting the need for further research.

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Area of Science:

  • Immunogenetics
  • Malariology
  • Vascular Biology

Background:

  • Cerebral malaria pathogenesis involves Plasmodium falciparum infected red blood cells adhering to microvessel endothelia, causing occlusion.
  • Endothelial receptors, cytokines, nitric oxide (NO), and cellular elements like platelets, monocytes, and lymphocytes contribute to this adhesion and occlusion.
  • Genetic variations (polymorphisms) in molecules regulating adhesion and endothelial responses are potential factors in cerebral malaria susceptibility and severity.

Purpose of the Study:

  • To investigate the role of genetic polymorphisms in key molecules involved in cerebral malaria pathogenesis.
  • To explore associations between specific gene variants and the risk or severity of cerebral malaria.

Main Methods:

  • Candidate gene approach, primarily using case-control studies.

Related Experiment Videos

  • Exploration of polymorphisms in ICAM-1, TNF-alpha, IL-1-beta, inducible NOS, complement receptor-1 (CR-1), mannose binding protein (MBP), and HLA-B53.
  • Consideration of family studies to overcome limitations in establishing control cohorts.

    • Main Results:

    • A clear association was found only for Tumor Necrosis Factor-alpha (TNF-alpha) gene polymorphism.
    • No association was found for Interleukin-1 receptor antagonist (IL-1RA), CR-1, and MBP polymorphisms.
    • Geographically heterogeneous results were observed for ICAM-1 and HLA-B53, while iNOS2 results were contradictory.

    Conclusions:

    • The genetic contribution to cerebral malaria is complex, with inconsistent findings for most candidate gene polymorphisms studied.
    • TNF-alpha polymorphism appears to be a significant genetic factor, while others require further investigation.
    • Family-based studies offer a robust approach for future research into the genetic underpinnings of cerebral malaria.