Cited by 484Seaweed-derived Bioactive CompoundsPolysaccharides Composition and ApplicationsPolysaccharides and Plant Cell Walls

Fucoidans from the brown seaweed Adenocystis utricularis: extraction methods, antiviral activity and structural studies

Ponce, Nora M.A., Pujol, Carlos A., Damonte, Elsa B., Flores, Marı&#x;a L., Stortz, Carlos A.·2003·Carbohydrate Research

Abstract

The brown seaweed Adenocystis utricularis (family Adenocystaceae, order Ectocarpales sensu lato) was extracted in parallel with three solvents usually utilized for obtaining fucoidans: distilled water, 2% calcium chloride solution and diluted hydrochloric acid (pH 2) solution. In each case, the extraction was effected at room temperature and then at 70 degrees C. The extraction yields and characteristics of the products were similar in the three cases, with only minor differences. The analytical features of the products indicate that two different types of fucoidans are present in this seaweed. One of them, mostly extracted at room temperature, is composed mainly of L-fucose, D-galactose and ester sulfate (the 'galactofucan'). The other product (the 'uronofucoidan') is the major component of the extracts obtained at 70 degrees C. It is composed mainly of fucose, accompanied by other monosaccharides (mostly Man, but also Glc, Xyl, Rha and Gal), significant amounts of uronic acids and low proportions of sulfate ester. Fractionation with the cationic detergent cetrimide has allowed achieving a better separation of the galactofucan and uronofucoidan components. The galactofucans show a high inhibitory activity against herpes simplex virus 1 and 2, with no cytotoxicity, whereas the uronofucoidans carry no antiviral activity. Structural studies on the galactofucan fractions were carried out by methylation analysis, desulfation and NMR spectroscopy. The fucan constituent is mainly composed of 3-linked alpha-L-fucopyranosyl backbone, mostly sulfated at C-4, and branched at C-2 with non-sulfated fucofuranosyl and fucopyranosyl units, and 2-sulfated fucopyranosyl units. The galactan moiety is more heterogeneous, with predominant D-galactopyranose units linked on C-3 and C-6, and sulfation mostly on C-4, even in terminal non-reducing units. It may be inferred that at least some of these galactose units carry the alpha-configuration.

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Crossref · 10.1016/s0008-6215(02)00403-2

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Authors
Ponce, N. M. A., Pujol, C. A., Damonte, E. B., Flores, M. L., & Stortz, C. A.
Affiliations
Universidad de Buenos Aires (AR)
Corresponding author
Stortz, Carlos A.
Venue
Carbohydrate Research
Publisher
Elsevier BV
Published
2003-01
Volume
338
Issue
2
Pages
153-165
ISSN
0008-6215 (ISSN-L)
OpenAlex
W1981755056
Cited by
484
References
56
Citations by year
2026: 5 · 2025: 21 · 2024: 20 · 2023: 14 · 2022: 40 · 2021: 40 · 2020: 32 · 2019: 23 · 2018: 24 · 2017: 25 · 2016: 18 · 2015: 24 · 2014: 22 · 2013: 23 · 2012: 21
FWCI
11.76
Type
journal article
Language
en
Open access
closed
Locations
  • Carbohydrate Research (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Agricultural and Biological Sciences › Aquatic Science › Seaweed-derived Bioactive Compounds
  • Life Sciences › Agricultural and Biological Sciences › Food Science › Polysaccharides Composition and Applications
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Polysaccharides and Plant Cell Walls
Keywords
fucoidan, brown algae, antiviral activity, herpes simplex virus type 1, herpes simplex virus type 2, sulfate esters, uronic acid, extraction methods, sulfated polysaccharides
MeSH terms
Animals, Antiviral Agents, Cell Survival, Chlorocebus aethiops, Chemical Fractionation, Polysaccharides, Seaweed, Vero Cells, Molecular Structure, Herpesvirus 2, Human, Herpesvirus 1, Human, Inhibitory Concentration 50

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