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• W1566032349 abstract "Malaria remains a major health problem especially in tropical and subtropical regions of the world, and therefore developing new antimalarial drugs constitutes an urgent challenge. Lipid metabolism has been attracting a lot of attention as an application for malarial chemotherapeutic purposes in recent years. However, little is known about glycosphingolipid biosynthesis in Plasmodium falciparum . In this report we describe for the first time the presence of an active glucosylceramide synthase in the intraerythrocytic stages of the parasite. Two different experiments, using UDP‐[ 14 C]glucose as donor with ceramides as acceptors, or UDP‐glucose as donor and fluorescent ceramides as acceptors, were performed. In both cases, we found that the parasitic enzyme was able to glycosylate only dihydroceramide. The enzyme activity could be inhibited in vitro with low concentrations of d , l ‐ threo ‐phenyl‐2‐palmitoylamino‐3‐morpholino‐1‐propanol (PPMP). In addition, de novo biosynthesis of glycosphingolipids was shown by metabolic incorporation of [ 14 C]palmitic acid and [ 14 C]glucose in the three intraerythrocytic stages of the parasite. The structure of the ceramide, monohexosylceramide, trihexosylceramide and tetrahexosylceramide fractions was analysed by UV‐MALDI‐TOF mass spectrometry. When PPMP was added to parasite cultures, a correlation between arrest of parasite growth and inhibition of glycosphingolipid biosynthesis was observed. The particular substrate specificity of the malarial glucosylceramide synthase must be added to the already known unique and amazing features of P. falciparum lipid metabolism; therefore this enzyme might represent a new attractive target for malarial chemotherapy." @default.
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• W1566032349 date "2004-05-17" @default.
• W1566032349 modified "2023-10-17" @default.
• W1566032349 title "Glycosphingolipids in Plasmodium falciparum" @default.
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• W1566032349 doi "https://doi.org/10.1111/j.1432-1033.2004.04150.x" @default.
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