How Plasmodium falciparum's var genes affect malaria immunity
Author Information
Author(s): Mario Recker, Nimalan Arinaminpathy, Caroline O. Buckee
Primary Institution: Department of Zoology, University of Oxford
Hypothesis
How do recombination hierarchies within the var gene repertoire of Plasmodium falciparum influence antigenic diversity and the acquisition of clinical immunity?
Conclusion
Recombination hierarchies within the var gene repertoire of P. falciparum severely limit strain diversity and the process of acquiring immunity against clinical malaria.
Supporting Evidence
- The partitioning of the var gene repertoire limits the total diversity attainable through recombination.
- A small number of infections can protect against severe malaria despite a large number of possible gene combinations.
- Immunity to malaria is acquired early in life after only a few infections.
Takeaway
The malaria parasite has many different genes that help it avoid the immune system, and how these genes are grouped affects how well people can build immunity to malaria.
Methodology
Mathematical analysis and stochastic simulations were used to investigate how recombination hierarchies affect diversity and immunity acquisition.
Limitations
The study assumes all possible combinations of var genes exist within the population, which may not reflect reality.
Digital Object Identifier (DOI)
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