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Morphological changes in erythrocytes induced by malarial parasites.
1Institute of Pathology, Case Western Reserve University, Cleveland, OH 44106.
Biology of the Cell
|January 1, 1988
Summary
Host cell alterations during Plasmodium infection facilitate malaria antigen transport to the erythrocyte membrane. These changes, including knobs and clefts, vary by Plasmodium species, impacting disease pathogenesis.
Area of Science:
- Cell Biology
- Parasitology
- Immunology
Background:
- Malaria, caused by Plasmodium parasites, significantly alters host erythrocyte structure and function.
- Understanding these host cell modifications is crucial for deciphering parasite-host interactions and disease mechanisms.
Purpose of the Study:
- To investigate and compare host cell alterations induced by different Plasmodium species (P. falciparum, P. brasilianum, P. vivax, P. malariae).
- To elucidate the role of these alterations in the trafficking of parasite antigens to the erythrocyte surface.
Main Methods:
- Electron microscopy (EM) and post-embedding immunoelectron microscopy were employed.
- Detailed morphological analysis of infected erythrocytes was performed for each Plasmodium species.
Main Results:
- P. falciparum induces knobs, electron-dense material, and clefts involved in antigen export and adherence to endothelial cells, potentially causing cerebral malaria.
- P. brasilianum also induces knobs, clefts, and electron-dense material, suggesting independent antigen trafficking.
- P. vivax and P. malariae exhibit distinct alterations, including caveola-vesicle complexes and caveolae, respectively, also implicated in antigen transport.
Conclusions:
- Host cell modifications are a conserved strategy across Plasmodium species to facilitate antigen presentation on the erythrocyte membrane.
- These alterations play a role in parasite adhesion and pathogenesis, though their full significance requires further investigation.