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Cajachalcone: An Antimalarial Compound from Cajanus cajan Leaf Extract.
E O Ajaiyeoba1, O O Ogbole, O O Abiodun
1Department of Pharmacognosy, University of Ibadan, Ibadan 200284, Nigeria.
Journal of Parasitology Research
|August 24, 2013
Summary
A Nigerian plant, Cajanus cajan, contains a compound called cajachalcone with significant antimalarial activity against Plasmodium falciparum. This natural compound shows promise as a potential new lead for antimalarial drug discovery.
Area of Science:
- Ethnobotany
- Pharmacology
- Organic Chemistry
Background:
- Cajanus cajan L. (Fabaceae) is recognized in Nigerian ethnobotany for its antimalarial properties.
- Plasmodium falciparum resistance necessitates novel antimalarial drug discovery.
Purpose of the Study:
- To isolate and identify the antimalarial compound from Cajanus cajan leaves.
- To evaluate the in vitro antimalarial activity of the isolated compound.
Main Methods:
- Bioassay-guided fractionation of C. cajan leaf methanol extract.
- In vitro testing against Plasmodium falciparum (K1 strain) using parasite lactate dehydrogenase assay.
- Compound isolation via chromatography and structure elucidation using spectroscopy.
Main Results:
- A cajachalcone, identified as 2',6'-dihydroxy-4-methoxy chalcone, was isolated from the ethyl acetate fraction.
- Cajachalcone demonstrated significant in vitro antimalarial activity with an IC50 of 2.0 μg/mL (7.4 μM).
Conclusions:
- Cajachalcone is the active antimalarial constituent of Cajanus cajan leaves.
- Cajachalcone represents a promising lead compound for the development of new antimalarial drugs.
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