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Antimalarial Activity of Axidjiferosides, New β-Galactosylceramides from the African Sponge Axinyssa djiferi

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Author(s): Fereshteh Farokhi | Philippe Grellier | Monique Clément | Christos Roussakis | Philippe M. Loiseau | Emilie Genin-Seward | Jean-Michel Kornprobst | Gilles Barnathan | Gaëtane Wielgosz-Collin

Journal: Marine Drugs
ISSN 1660-3397

Volume: 11;
Issue: 4;
Start page: 1304;
Date: 2013;
Original page

Keywords: Axinyssa | marine sponge glycolipids | glycosphingolipids | antimalarial activity | cytotoxicity

ABSTRACT
The marine sponge, Axinyssa djiferi, collected on mangrove tree roots in Senegal, was investigated for glycolipids. A mixture containing new glycosphingolipids, named axidjiferoside-A, -B and -C, accounted for 0.07% of sponge biomass (dry weight) and for 2.16% of total lipids. It showed a significant antimalarial activity, with a 50% inhibitory concentration (IC50) of 0.53 ± 0.2 μM against a chloroquine-resistant strain of Plasmodium falciparum. They were identified as homologous β-galactopyranosylceramides composed of 2-amino-(6E)-octadec-6-en-1,3,4-triol, and the major one, axidjiferoside-A (around 60%), contained 2-hydroxytetracosanoic acid. Cytotoxicity was studied in vitro on human cancer cell lines (multiple myeloma, colorectal adenocarcinoma, glioblastoma and two lung cancer NSCLC-N6 and A549). Results of this investigation showed that axidjiferosides are of interest, because they proved a good antiplasmodial activity, with only a low cytotoxicity against various human cell lines and no significant antitrypanosomal and antileishmanial activity. Thus, it seems that galactosylceramides with a β anomeric configuration may be suitable in searching for new antimalarial drugs.
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