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Related Experiment Videos

Erythrocyte aging and malaria.

I W Sherman1, S Eda, E Winograd

  • 1Department of Biology, University of California, Riverside, CA 92521, USA. sherman@mail.ucr.edu

Cellular and Molecular Biology (Noisy-Le-Grand, France)
|April 21, 2004
PubMed
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Plasmodium falciparum infection causes red blood cells to age, altering their shape, membrane, and permeability. These changes help the parasite evade immune destruction by sequestering infected cells in deep tissues.

Area of Science:

  • Cell Biology
  • Parasitology
  • Immunology

Background:

  • Plasmodium falciparum infection induces premature aging (senescence) in red blood cells.
  • Parasitized erythrocytes exhibit altered biophysical and biochemical properties.

Purpose of the Study:

  • To detail the age-dependent changes in red blood cells during Plasmodium falciparum infection.
  • To elucidate the mechanisms by which infected cells evade splenic clearance.

Main Methods:

  • Analysis of red blood cell morphology, deformability, and membrane composition.
  • Investigation of ion flux, permeability changes, and surface molecule expression.
  • Examination of parasite-induced alterations and their role in immune evasion.

Main Results:

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  • Parasitized cells become less dense, less deformable, and develop surface knobs.
  • Externalization of phosphatidylserine (PS) and altered membrane permeability (new permeation pathways) are observed.
  • Clustering of band 3 protein, neoantigen exposure, and deposition of hemichromes occur, contributing to sequestration and immune evasion.

Conclusions:

  • Plasmodium falciparum actively modifies red blood cells, inducing senescence-like changes.
  • These alterations facilitate parasite survival by promoting sequestration in microvasculature and avoiding splenic clearance.