Researcher ORCID Identifier

0009-0000-0485-3359

Graduation Year

2025

Document Type

Open Access Senior Thesis

Degree Name

Bachelor of Arts

Department

Chemistry

Reader 1

Professor Daniel J. O'Leary

Reader 2

Professor Matthew H. Sazinsky

Rights Information

© 2025 Leandre Nsabimana Ndisanze

Abstract

Malaria remains one of the most devastating parasitic diseases globally, disproportionately affecting sub-Saharan Africa, where Rwanda continues to face high transmission rates and rising resistance to conventional interventions. Despite decades of control efforts, the emergence of drug-resistant Plasmodium falciparum and insecticide-resistant Anopheles mosquitoes threatens to reverse recent gains. This research responds to the urgent need for sustainable and culturally relevant alternatives by exploring the therapeutic potential of Rwandan traditional medicinal plants. These indigenous remedies, long used by local healers, offer an underexplored reservoir of bioactive compounds that may provide the basis for novel antimalarial drugs.

The central hypothesis of this thesis is that Rwandan ethnobotanical knowledge, when combined with modern pharmacological and analytical methods, can yield effective, low-cost antimalarial agents. To test this, the study will begin with in vitro screening of traditionally used plant extracts using the SYBR Green I fluorescence assay to evaluate their inhibitory effects on P. falciparum. Extracts meeting potency thresholds (IC with ₅₀ < 50 µg/mL) will advance to secondary validation, and extraction techniques will ensure the efficient and selective isolation of active phytochemicals.

Subsequent steps will include chromatographic purification and structural characterization of lead compounds via spectroscopic (NMR, MS) and computational (docking, AlphaFold) methods. These approaches will elucidate the interaction of active molecules with known parasite targets, such as heme detoxification pathways. The research further incorporates ecological and economic assessments to determine the sustainability of plant-based drug development and promote community-based cultivation strategies.

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