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Antiplasmodial activity of extracts of tridax procumbens and phyllanthus amarus in in vitro plasmodium falciparum culture systems

Show simple item record Appiah-Opong, R. Nyarko, A.K. Dodoo, D. Gyang, F.N. Ayisi, N.K. Koram, K.A. 2021-07-12T13:00:40Z 2021-07-12T13:00:40Z 2011
dc.identifier.issn 23105496
dc.description 8p:, ill. en_US
dc.description.abstract Background: Aqueous extracts of Tridax procumbens (TP) (Compositae) and Phyllanthus amarus (PA) (Euphorbiaceae) are used in traditional medicine in Ghana to treat malaria. Previous studies have demonstrated the anti-trypanosoma, anti-bacterial and anti-HIV effects of TP and PA. Objective: To assess the antiplasmodial activity of extracts of TP and PA. Method: Aqueous extracts of TP and PA were prepared. A portion of each was freeze-dried and the remaining extracted sequentially with ethyl acetate and chloroform. Ethanolic extracts were also prepared. The antiplasmodial activity of the extracts was assessed with the 3H-hypoxanthine assay using chloroquine resistant (Dd2) Plasmodium falciparum parasites. Chloroquine was used as the reference drug. The modified tetrazolium-based colorimetric assay was also used to evaluate the red blood cell (RBC)- protective/antiplasmodial activities and cytotoxicities of the extracts. Results: Results showed that TP and PA have antiplasmodial activities. The aqueous and ethanolic extracts of PA were the most active, yielding EC50 values of 34.9μg/ml and 31.2μg/ml, respectively in the tetrazolium-based assay. The TP and PA produced and IC50 values of 24.8μg/ml and 11.7μg/ml, respectively in the hypoxanthine assay. Protection of human RBCs against P. falciparum damage by the extracts highly correlated with their antiplasmodial activities. None of the extracts, within the concentration range (1.9- 500μg/ml) studied produced any overt toxicity to human RBCs. Conclusion: The results indicate that both PA and TP have activities against chloroquine-resistant P. falciparum (Dd2) parasites. The antiplasmodial principles extracted into water and ethanol but not chloroform or ethyl acetate en_US
dc.language.iso en en_US
dc.publisher University of Cape Coast en_US
dc.subject Antiplasmodial en_US
dc.subject Tridax procumbens en_US
dc.subject Phyllanthus amarus en_US
dc.subject Tetrazolium-based assay en_US
dc.subject H-hypoxanthine uptake assays en_US
dc.title Antiplasmodial activity of extracts of tridax procumbens and phyllanthus amarus in in vitro plasmodium falciparum culture systems en_US
dc.type Article en_US

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