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Polysaccharides from Gracilaria corticata: Sulfation, chemical characterization and anti-HSV activities

By Kausik Chattopadhyay, Tuhin Ghosh, Carlos Alberto Pujol, Maria Josefina Carlucci, Elsa Beatriz Damonte and Bimalendu Ray

Abstract

In this study, we have analyzed water-extracted polysaccharides of Gracilaria corticata. The water extract (WE), a galactan-containing sub-fraction (F3) and their hyper sulfated derivatives (WES1, WES2, F3S1 and F3S2) had anti-HSV activity with inhibitory concentration 50% (IC50) from 1.1 to 27.4 μg/ml. Sub-fraction F3, which has a molecular mass of 30 kDa, consists of a backbone of β-(1 → 3) and α-(1 → 4)-linked-galactopyranosyl residues. This linear galactan contained Gal2Xyl1, Gal2AnGal2, Gal4 and Me-Gal3AnGal2 as oligomeric building subunits. Sulfate group was located at C-4 of (1 → 3)-linked galactopyranosyl residues of the native galactan, and appeared to be very important for the anti-herpetic activity.Fil: Chattopadhyay, Kausik. The University of Burdwan; IndiaFil: Ghosh, Tuhin. The University of Burdwan; IndiaFil: Pujol, Carlos Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Biológica. Laboratorio de Virología; ArgentinaFil: Carlucci, Maria Josefina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Biológica. Laboratorio de Virología; ArgentinaFil: Damonte, Elsa Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Biológica. Laboratorio de Virología; ArgentinaFil: Ray, Bimalendu. The University of Burdwan; Indi

Topics: ANTI-HSV ACTIVITY, GALACTAN SULFATE, GRACILARIA CORTICATA, Virología, Ciencias Biológicas, CIENCIAS NATURALES Y EXACTAS
Publisher: Elsevier Science
Year: 2008
DOI identifier: 10.1016/j.ijbiomac.2008.07.009
OAI identifier: oai:ri.conicet.gov.ar:11336/83538
Provided by: CONICET Digital
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