Discovering the targets of drugs that stop malaria parasites invading red blood cells

Research Opportunity
Honours
Number of Honour Places Available
1
Department
Medicine and Radiology
Location
Burnet Institute
Primary Supervisor Email Number Webpage
Dr Paul Gilson paul.gilson@burnet.edu.au 0433685205
Co-supervisor Email Number Webpage
A. Prof. Freya Fowkes freya.fowkes@burnet.edu.au

Summary This project will involve discovering the mechanism of action of several compounds that inhibit the invasion of human red blood cells by malaria parasites. The protein targets of the inhibitory compounds will be discovered in parasites along with the role the target proteins play during the invasion process.

Project Details

Malaria caused by the blood-stage of Plasmodium falciparum, remains a major global health problem with about 40% of the world’s population at risk of infection. Although there have been major reductions in disease impact over the last 10 years due to increased malaria control, this downward trajectory has recently stalled. Of particular concern is the spread of multi-drug resistant parasites in regions of Asia, including to artemisinin combination therapies, the current frontline treatments. This emphasizes the critical need to discover novel drug targets with different and known mechanisms of action (MoA) to produce highly potent treatments refractory to resistance. After the invasive merozoite parasite stage invades a red blood cell (RBC) the parasite grows and replicates to yield ~20 new merozoites that egress from the old RBC to infect new cells. This exponential amplification of infected RBCs results in symptomatic malaria and as such merozoites are an ideal therapeutic target since any new drug or vaccine that could block merozoite invasion would dramatically reduce the parasite load. This project will involve discovering the MoA of several invasion inhibiting drugs identified in a library of parasite killing compounds called the MMV Malaria Box. Bioluminescent parasites treated with the MMV compounds will be assayed to discover which step in the complex egress and RBC invasion process is being blocked. Live cell imaging of invading merozoites will be further performed to validate which invasion step is being affected by the MMV compounds. Finally, parasites will be repeatedly treated with the MMV compounds to attempt to select for genetic resistance in genes for the target proteins of the drugs. If time permits target gene mutations will be identified through genome sequencing. Laboratory techniques learned will include tissue culturing, parasites growth experiments, assay development, fluorescence microscopy and CRISPR/Cas9 engineering of resistance mutations.



Faculty Research Themes

Infection and Immunology

School Research Themes

Women's Health



Research Opportunities

Honours
Students who are interested in joining this project will need to consider their elegibility as well as other requirements before contacting the supervisor of this research

Graduate Research application

Honours application

Key Contact

For further information about this research, please contact a supervisor.

Department

Medicine and Radiology

Research Node

Burnet Institute

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