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Natural triterpenic phenolic esters target PfA-M17 in Plasmodium falciparum
Lúcia Mamede1,2, Gabriel W Rangel3, Marjorie Schmitt4
1Pharmacognosy Research Group, Louvain Drug Research Institute (LDRI), UCLouvain, Brussels, Belgium.
Malaria Journal
|January 4, 2026
Summary
A mixture of eight triterpenic esters (8TTE) shows anti-malarial activity by inhibiting the Plasmodium falciparum aminopeptidase PfA-M17. This discovery offers potential for developing new malaria treatments.
Area of Science:
- Parasitology
- Medicinal Chemistry
- Drug Discovery
Background:
- Malaria necessitates novel therapeutic strategies.
- Eight triterpenic esters (8TTE) from Keetia leucantha exhibit antiplasmodial properties.
- The precise molecular targets of 8TTE remain unidentified.
Purpose of the Study:
- To elucidate the mode of action of 8TTE against Plasmodium falciparum.
- To identify the molecular targets and metabolic pathways affected by 8TTE.
Main Methods:
- Phenotypic analysis of parasite growth.
- Enzymatic assays targeting key parasite proteins.
- Molecular docking simulations.
- Metabolomic profiling to assess metabolic perturbations.
Main Results:
- 8TTE demonstrated activity against the early-ring stage of Plasmodium falciparum.
- Inhibition of the aminopeptidase PfA-M17 (PlasmoDB PF3D7_1446200) was identified as a key mechanism.
- Perturbations in parasite hemoglobin metabolism were observed.
Conclusions:
- 8TTE exhibits a distinct antiplasmodial profile targeting aminopeptidase PfA-M17.
- These findings support further investigation into 8TTE analogs for antimalarial drug development.
- Structure-activity relationship studies are recommended to optimize 8TTE-based therapeutics.
