Silencing of Plasmodium falciparum Genes Linked to Erythrocyte Invasion
Author Information
Author(s): Cortés Alfred, Carret Celine, Kaneko Osamu, Yim Lim Brian Y. S., Ivens Alasdair, Holder Anthony A
Primary Institution: Division of Parasitology, Medical Research Council National Institute for Medical Research (NIMR), London, United Kingdom
Hypothesis
The different invasion phenotypes of 3D7-A and 3D7-B parasite lines might be accounted for by differences in the expression of some invasion-related genes.
Conclusion
The study demonstrates that epigenetic silencing of invasion-related genes in Plasmodium falciparum allows the parasite to adapt to its human host without altering its genetic information.
Supporting Evidence
- The study found that certain genes involved in erythrocyte invasion can be silenced without changes to the DNA.
- Silencing of genes was shown to be clonally transmitted, indicating an epigenetic mechanism.
- The expression of invasion-related genes varied among subclones of the parasite, suggesting a mosaic of gene expression.
Takeaway
The malaria parasite can turn off certain genes that help it invade red blood cells, which helps it avoid the immune system and adapt quickly.
Methodology
Microarray comparison of two isogenic parasite lines, 3D7-A and 3D7-B, to identify invasion-related genes under variant expression.
Limitations
The study did not identify the specific genes responsible for the different invasion phenotypes of the two parasite lines.
Digital Object Identifier (DOI)
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