tetano
Editor, Senior Moderator
Carbohydr Polym. 2014 Oct 13;111:633-44. doi: 10.1016/j.carbpol.2014.05.032. Epub 2014 May 23.
Mekabu fucoidan: Structural complexity and defensive effects against avian influenza A viruses.
Synytsya A1, Bleha R2, Synytsya A3, Pohl R4, Hayashi K5, Yoshinaga K6, Nakano T6, Hayashi T7.
Author information
Abstract
Fucoidan from the sporophyll (Mekabu) of brown seaweed Undaria pinnatifida (wakame) is interesting due to its various biological activities. Mekabu fucoidan (Mw ∼9kDa) of this study (MF) was previously isolated and characterized by chemical and separation methods including GPC and methylation analysis (Lee, Hayashi, Hashimoto, Nakano, & Hayashi, 2004). It was found that this fucoidan composed of partially sulphated (DS ∼0.72) fucose and galactose at approximately equal amounts. Methylation analyses revealed complex structure of MF. However, it has been still unclear about the linkages between units and substitution patterns. To solve these structural tasks, spectroscopic methods (FTIR, FT Raman and NMR) were used in the analysis of native MF and its deesterified derivatives. According to obtained results, this polysaccharide was defined as O-acetylated sulphated fucogalactan. The defensive effects of MF were evaluated on mice infected with avian influenza A viruses (H5N3 and H7N2 subtypes); its efficacy was determined in reducing viral replication and increasing antibody production. Oral administration of MF resulted in suppressing virus yields. In addition, the production of neutralizing antibodies and mucosal IgA in the animals inoculated with the avian influenza A viruses was significantly increased. These results suggested that MF could be used for the prevention of viral infection.
Copyright ? 2014 Elsevier Ltd. All rights reserved.
KEYWORDS:
Avian influenza A virus; Immunostimulating effect; Mekabu fucoidan; Spectroscopic methods; Sporophyll Undaria pinnatifida
PMID:
25037398
[PubMed - in process]
http://www.ncbi.nlm.nih.gov/pubmed/25037398
Mekabu fucoidan: Structural complexity and defensive effects against avian influenza A viruses.
Synytsya A1, Bleha R2, Synytsya A3, Pohl R4, Hayashi K5, Yoshinaga K6, Nakano T6, Hayashi T7.
Author information
Abstract
Fucoidan from the sporophyll (Mekabu) of brown seaweed Undaria pinnatifida (wakame) is interesting due to its various biological activities. Mekabu fucoidan (Mw ∼9kDa) of this study (MF) was previously isolated and characterized by chemical and separation methods including GPC and methylation analysis (Lee, Hayashi, Hashimoto, Nakano, & Hayashi, 2004). It was found that this fucoidan composed of partially sulphated (DS ∼0.72) fucose and galactose at approximately equal amounts. Methylation analyses revealed complex structure of MF. However, it has been still unclear about the linkages between units and substitution patterns. To solve these structural tasks, spectroscopic methods (FTIR, FT Raman and NMR) were used in the analysis of native MF and its deesterified derivatives. According to obtained results, this polysaccharide was defined as O-acetylated sulphated fucogalactan. The defensive effects of MF were evaluated on mice infected with avian influenza A viruses (H5N3 and H7N2 subtypes); its efficacy was determined in reducing viral replication and increasing antibody production. Oral administration of MF resulted in suppressing virus yields. In addition, the production of neutralizing antibodies and mucosal IgA in the animals inoculated with the avian influenza A viruses was significantly increased. These results suggested that MF could be used for the prevention of viral infection.
Copyright ? 2014 Elsevier Ltd. All rights reserved.
KEYWORDS:
Avian influenza A virus; Immunostimulating effect; Mekabu fucoidan; Spectroscopic methods; Sporophyll Undaria pinnatifida
PMID:
25037398
[PubMed - in process]
http://www.ncbi.nlm.nih.gov/pubmed/25037398