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Pf155/RESA antigen is localized in dense granules of Plasmodium falciparum merozoites
M Aikawa1, M Torii, A Sjölander
1Institute of Pathology, Case Western Reserve University, Cleveland, Ohio 44106.
Abstract:
Immunoelectron microscopy demonstrated the presence of Pf155/RESA in dense granules of Plasmodium falciparum merozoites rather than in micronemes as previously suggested. Since the dense granules are released after the merozoite enters the parasitophorous vacuole, the role of Pf155/RESA in invasion and subsequent steps of parasite development may differ from that of a molecule located in the micronemes.
Insights
The Plasmodium falciparum protein Pf155/RESA is located in dense granules, not micronemes. This finding suggests a different role for Pf155/RESA in malaria parasite invasion and development.
Area of Science:
- Malariology
- Cell Biology
- Parasitology
Background:
- The Plasmodium falciparum merozoite invasion process is crucial for malaria pathogenesis.
- The precise localization of merozoite surface proteins influences their function during invasion.
Purpose of the Study:
- To determine the accurate subcellular localization of the Plasmodium falciparum protein Pf155/RESA.
Main Methods:
- Immunoelectron microscopy was employed to visualize the localization of Pf155/RESA within Plasmodium falciparum merozoites.
Main Results:
- Pf155/RESA was identified within the dense granules of Plasmodium falciparum merozoites.
- Contrary to previous hypotheses, Pf155/RESA was not found in the micronemes.
Conclusions:
- The dense granule localization of Pf155/RESA suggests its release post-invasion into the parasitophorous vacuole.
- The function of Pf155/RESA in parasite development may differ from proteins localized in micronemes.