title: Cytotoxic activities of hexane, ethyl acetate and butanol extracts of marine sponges from Mauritian Waters on human cancer cell lines.
abstract: The ocean is an exceptional source of natural products with many of them exhibiting novel structural features and bioactivity. As one of the most interesting phylum with respect to pharmacological active marine compounds, Poriferas have been investigated widely in the last few decades. A total of 60 organic extracts (hexane, ethyl acetate and butanol) from 20 species of marine sponges from Mauritius were screened at 50μg/ml in an in vitro screening assay against 9 human cancer cell lines. From these tested extracts, many exhibited pronounced cytotoxic effect at least in one of the cell lines and cell type cytotoxic specificity was observed. 27% of ethyl acetate, 11% of hexane and 2% of butanol extracts were found to possess a cytotoxicity ≥75% on 9 different cancer cell lines with the sponges Petrosia sp. 1, Petrosia sp. 2, Pericharax heteroraphis and Jaspis sp. being the most active. Overall, the HL-60cells were much more sensitive to most of the extracts than the other cell lines. We further evaluated the properties of the ethyl acetate (JDE) and hexane extract (JDH) of one sponge, Jaspis sp. on KB cells. JDE displayed a smaller IC(50) than JDH. Clonogenic assay confirmed the antiproliferative effect of both extracts while mitochondrial membrane potential change and microscopic analysis demonstrated extracts-induced apoptosis. Treatment with 100ng/ml of JDE led to a significant increase of cells (24h: 4.02%; 48h: 26.23%) in sub-G1 phase. The cytotoxic properties of the tested extracts from these sponges suggest the presence of compounds with pharmacological potential and are currently undergoing fractionation to isolate the active constituents.
authors: Mauritius Oceanography Institute, France Centre, Quatre-Bornes, Mauritius.
authors: Girish
authors: G
authors: Beedessee
authors: Mauritius Oceanography Institute, France Centre, Quatre-Bornes, Mauritius.
authors: Avin
authors: A
authors: Ramanjooloo
authors: Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Centre de Recherche de Gif, Gif sur Yvette, France.
authors: Geneviève
authors: G
authors: Aubert
authors: Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Centre de Recherche de Gif, Gif sur Yvette, France.
authors: Laure
authors: L
authors: Eloy
authors: Mauritius Oceanography Institute, France Centre, Quatre-Bornes, Mauritius.
authors: Rashmee
authors: R
authors: Surnam-Boodhun
authors: Netherlands Centre for Biodiversity Naturalis, Leiden, The Netherlands.
authors: Rob W M van
authors: RWMV
authors: Soest
authors: Institut de Chimie des Substances Naturelles, CNRS UPR 2301, Centre de Recherche de Gif, Gif sur Yvette, France.
authors: Thierry
authors: T
authors: Cresteil
authors: Mauritius Oceanography Institute, France Centre, Quatre-Bornes, Mauritius. Electronic address: depmarie@moi.intnet.mu.
authors: Daniel E P
authors: DEP
authors: Marie
mesh_terms: D020001:1-Butanol / Q000737:chemistry; D000085:Acetates / Q000737:chemistry; D000818:Animals; D000970:Antineoplastic Agents / Q000494:pharmacology*; D017209:Apoptosis / Q000187:drug effects; D001688:Biological Products / Q000494:pharmacology*; D002453:Cell Cycle / Q000187:drug effects; D045744:Cell Line, Tumor; D002470:Cell Survival / Q000187:drug effects; D045424:Complex Mixtures / Q000494:pharmacology*; D006586:Hexanes / Q000737:chemistry; D006801:Humans; D020128:Inhibitory Concentration 50; D008436:Mauritius; D053078:Membrane Potential, Mitochondrial / Q000187:drug effects; D011161:Porifera; D012997:Solvents / Q000737:chemistry
chemical_list: D000085:Acetates; D000970:Antineoplastic Agents; D001688:Biological Products; D045424:Complex Mixtures; D006586:Hexanes; D012997:Solvents; C026385:n-hexane; C007650:ethyl acetate; D020001:1-Butanol