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Structural characterization and cytotoxic properties of an apiose-rich pectic polysaccharide obtained from the cell wall of the marine phanerogam Zostera marina

Abstract : Zosterin, an apiose-rich pectic polysaccharide, was extracted and purified from the sea grass Zostera marina. Structural studies conducted by gas chromatography and NMR spectroscopy on a purified zosterin fraction (AGU) revealed a typical apiogalacturonan structure comprising an α-1,4-d- galactopyranosyluronan backbone substituted by 1,2-linked apiofuranose oligosaccharides and single apiose residues. The average molecular mass of AGU was estimated to be about 4100 Da with a low polydispersity. AGU inhibited proliferation of A431 human epidermoid carcinoma cells with an approximate IC50 value of 3 μg/mL (0.7 μM). In addition, AGU inhibited A431 cell migration and invasion. Preliminary experiments showed that inhibition of metalloproteases expression could play a role in these antimigration and anti-invasive properties. Autohydrolysis of AGU, which eliminated apiose and oligo-apiose substituents, led to a virtual disappearance of cytotoxic properties, thus suggesting a direct structure-function relationship with the apiose-rich hairy region of AGU.
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https://hal.archives-ouvertes.fr/hal-00641637
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Submitted on : Wednesday, November 16, 2011 - 1:04:39 PM
Last modification on : Saturday, March 26, 2022 - 4:22:34 AM

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Vincent Gloaguen, Véronique Brudieux, B. Closs, Aline Barbat-Rogeon, Pierre Krausz, et al.. Structural characterization and cytotoxic properties of an apiose-rich pectic polysaccharide obtained from the cell wall of the marine phanerogam Zostera marina. Journal of Natural Products, American Chemical Society, 2010, 73 (6), pp.1087-1092. ⟨10.1021/np100092c⟩. ⟨hal-00641637⟩

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