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Identification of vulnerable antimalarial targets using conditional loss of function mutants
Philip J Shaw1, Parichat Prommana1, Chayaphat Wongsombat1
1National Center for Genetic Engineering and Biotechnology (BIOTEC), 113 Thailand Science Park, National Science and Technology Development Agency, Phahonyothin Road, Khlong Nueng, Khlong Luang, Pathum Thani, Thailand.
New antimalarial drug discovery focuses on novel targets to combat resistance. Researchers identified UGT1, DHFS-FPGS, and GAT as vulnerable targets in Plasmodium falciparum, offering new avenues for fast-acting treatments.
Area of Science:
- Malariology
- Drug Discovery
- Molecular Biology
Background:
- Drug-resistant malaria parasites pose a significant threat to global health.
- Novel antimalarial compounds with new modes of action are crucial.
- Identifying vulnerable parasite targets can lead to fast-acting drugs with reduced resistance.
- Phenotypic assessment of conditional loss-of-function mutants is a method to identify vulnerable targets.
Purpose of the Study:
- To identify novel, vulnerable targets in Plasmodium falciparum for antimalarial drug development.
- To develop a method for assessing target vulnerability using conditional gene knockdown.
- To discover new drug targets that are essential for parasite survival and may lead to fast-acting antimalarials.
Main Methods:
- Edited 16 Plasmodium falciparum genes using the glmS ribozyme tool for conditional target expression and epitope tagging.
- Assessed target protein localization via confocal microscopy.
- Generated conditional loss-of-function mutants and assessed knockdown via transcriptomic RNA sequencing and western blotting.
- Performed target vulnerability assays on the generated mutants.
Main Results:
- Successfully generated conditional knockdown mutants for 16 Plasmodium falciparum genes.
- Identified UGT1, DHFS-FPGS, and GAT as new vulnerable targets in Plasmodium falciparum.
- Demonstrated the utility of phenotypic assessment of conditional loss-of-function mutants for target discovery.
Conclusions:
- UGT1, DHFS-FPGS, and GAT represent promising new targets for antimalarial drug development.
- Conditional gene knockdown coupled with phenotypic assessment is an effective strategy for identifying vulnerable parasite targets.
- This approach can accelerate the discovery of novel antimalarials with improved efficacy and reduced resistance potential.
