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Effect of Dequalinium on the Oxidative Stress in Plasmodium Berghei-infected Erythrocytes

Overview
Journal Parasitol Res
Specialty Parasitology
Date 2009 Feb 12
PMID 19205739
Citations 11
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Abstract

The bisquinoline drug dequalinium (DQ) has demonstrated remarkable activity against some infection diseases, including malaria. Oxidative stress represents a biochemical target for potential antimalarials. In this work, we have tested the ability of this compound to modify the oxidative status in Plasmodium berghei-infected erythrocytes. After hemolysis, activities of superoxide dismutase (SOD), catalase (CAT), glutathione cycle, and dehydrogenase enzymes were investigated. The activity of glucose-6-phosphate dehydrogenase (G6PD) and 6-phosphogluconate dehydrogenase (6PGLD) in infected cells were diminished by this drug compared to controls (300% and 80% approximately, respectively), while glutathione peroxidase (GPx), glutathione transferase (GST), and glutathione levels were also lowered. As a compensatory response, we could appreciate an increase of SOD activity (20% approximately) in infected cells treated with DQ; however, catalase was not affected by the compound. Lipid peroxidation was also decreased by this drug, protecting the cells from the hemolysis caused by the infection. In conclusion, oxidative stress represents a biochemical event which is modulated by DQ, interfering with the antioxidant regular activities in P. berghei infection.

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