Medicinal Plants and Antimalarial Activity

Malaria remains a major global health burden, particularly in tropical and subtropical regions where Plasmodium parasites exhibit rising drug resistance. Throughout history, traditional medical systems have drawn upon the rich pharmacopeia of medicinal plants to treat malaria, most notably leading to the discovery of quinine from Cinchona bark and artemisinin from Artemisia annua. Contemporary research continues to explore a diversity of botanical sources for antiplasmodial compounds, emphasising ethnopharmacological knowledge as a guide. Investigation of plant extracts and purified secondary metabolites, such as alkaloids, flavonoids and terpenoids, has yielded promising leads with in vitro efficacy against Plasmodium falciparum and in vivo activity in murine models. Methodological advances in bioassay‐guided fractionation, coupled with improvements in analytical techniques for compound identification, have accelerated the characterisation of active phytochemicals and elucidation of their mechanisms of action. In parallel, efforts to assess cytotoxicity and selectivity indices underpin the development of safe and effective plant‐derived antimalarials. The integration of ethnobotanical surveys with modern pharmacological assays advances the discovery pipeline, bridging traditional wisdom and laboratory science to address the urgent need for novel antimalarial therapies.

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Medicinal Plants and Antimalarial Activity publication trend

The graph below shows the total number of articles in medicinal plants and antimalarial activity across all publications each year (not limited to Nature Index journals).

Technical terms

Plasmodium falciparum: The protozoan parasite species responsible for the most severe form of human malaria.

IC50: The concentration of a compound required to inhibit 50% of parasite growth in vitro, indicating its potency.

Selectivity index (SI): The ratio of a compound’s cytotoxic concentration to its antiplasmodial IC50, reflecting therapeutic window.

Alkaloids: Nitrogen‐containing secondary metabolites in plants, many of which have pharmacological activity.

Ethnopharmacology: The interdisciplinary study of traditional medicinal practices and the bioactive agents they employ.

References

1. In vitro and in vivo anti-malarial activity of plants from the Brazilian Amazon. Malaria Journal (2015).
2. Anti-malarial activity of indole alkaloids isolated from Aspidosperma olivaceum. Malaria Journal (2014).
3. Aspidosperma species as sources of anti-malarials: uleine is the major anti-malarial indole alkaloid from Aspidosperma parvifolium (Apocynaceae). Malaria Journal (2015).