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Andrographolide effect on both Plasmodium falciparum infected and noninfected RBCs membranes

Asian Pacific Journal of Tropical Medicine 2015年第7期8卷 505-510页

作者： Zaid O Ibraheem Abd Majid R Sabariah MN Hasidah MS Al-Zihiry K yam mf Basir R Pharmacology Unit Department of Human Anatomy Faculty of Medicine and Health Sciences Universiti Putra Malaysia Department of Medical Microbiology and Parasitology Faculty of Medicine and Health Sciences Universiti Putra Malaysia Department of Hematology Faculty of Medicine and Health Sciences Universiti Putra Malaysia School of Bioscience and Biotechnology Faculty of Science and Technology Universiti Kebangsaan Malaysia School of pharmaceutical science Universiti Sains Malaysia

Objective: To explore whether its antiplasmodium effect of andrographolide is attributed to its plausible effect on the plasma membrane of both Plasmodium falciparum infected and noninfected RBCs. Methods: Anti-plasmodium effect of andrographolide against Plasmodium falciparum strains was screened using the conventional malaria drug sensitivity assay. The drug was incubated with uninfected RBCs to monitor its effect on their morphology, integrity and osmotic fragility. It was incubated with the plasmodium infected RBCs to monitor its effect on the parasite induced permeation pathways. Its effect on the potential of merozoites to invade new RBCs was tested using merozoite invasion assay. Results: It showed that at andrographolide was innocuous to RBCs at concentrations approach its therapeutic level against plasmodia. Nevertheless, this inertness was dwindled at higher concentrations. Conclusions: In spite of its success to inhibit plasmodium induced permeation pathway and the potential of merozoites to invade new RBCs, its anti-plasmodium effect can't be attributed to these functions as they were attained at concentrations higher than what is required to eradicate the parasite. Consequently, other mechanisms may be associated with its claimed actions.

关键词： Andrographolide Terpenoid Plasmodium falciparum Merozoites Permeation & Osmotic fragility

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