Data/hora: 11/06/2024 06:47:41

Provedor de dados: | 3
País: | Brazil

Título:

Mild-acid hydrolysis of a native polysulfated fraction from Acanthophora muscoides generates sulfated oligosaccharides displaying in vitro thrombin generation inhibition

Mild-acid hydrolysis of a native polysulfated fraction from Acanthophora muscoides generates sulfated oligosaccharides displaying in vitro thrombin generation inhibition

Autores: | Rodrigues, José Ariévilo Gurgel; Queiroz, Ismael Nilo Lino de; Quinderé, Ana Luíza Gomes; Benevides, Norma Maria Barros; Tovar, Ana Maria Freire; Mourão, Paulo Antônio de Souza.
Data: | 2016-07-21
Ano: | 2016
Palavras-chave: | Ciências Biológicas e Ambientais Rhodophyceae; Poli-aniônicos; Depolimerização; Trombina. Química de macromoléculas Rhodophyceae; Polyanionics; Depolymerization; Thrombin.
Resumo: | Acanthophora muscoides (Rhodophyta) has three polysulfated fractions    (Am-1, Am-2 and Am-3). Am-2 displayed anti-inflammation and serpin-independent anticoagulation; however, no effect of oligomers on thrombin-generation (TG) assay has been demonstrated. This study employed mild-acid hydrolysis to obtain low-molecular-size derivatives from Am-2 and compared in vitro inhibitory effects between intact Am-2 and its hydrolysates on a TG assay. The enzymatic extract was fractionated by DEAE-cellulose that revealed Am-2 eluted with 0.75-M NaCl containing sulfate (23%), hexoses (51%) and devoid of proteins, and indicating, by one-dimension nuclear magnetic resonance, structure of galactan similar to that of extract. The depolymerization with HCl (0.02 or 0.04-M, 60°C) for different times progressively reduced the charge density and the molecular-size of Am-2 based on electrophoreses in agarose and polyacrylamide gels, respectively, where at higher acid concentration and critical time up to 5 h yielded fragment of  ̴ 10-kDa similar to that of unfractionated heparin (UHEP). Regarding the TG assay, intact Am-2 inhibited concentration-dependent the intrinsic pathway, whereas its hydrolysates abolished it like UHEP, when in 60-fold diluted human plasma using chromogenic method by a continuous system. The results reveal an alternative approach for producing oligosaccharides from A. muscoides with TG inhibition.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês

Identificador:

http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/28257

10.4025/actascibiolsci.v38i1.28257

Editor: | Universidade Estadual De Maringá
Relação: | http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/28257/pdf
Formato: | application/pdf

Fonte:

Acta Scientiarum. Biological Sciences; v. 38, n. 1 (2016); 7-15

Acta Scientiarum. Biological Sciences; v. 38, n. 1 (2016); 7-15

1807-863X

1679-9283