Fucans
Mostrando 1-12 de 13 artigos, teses e dissertações.
-
1. Algal polysaccharides as source of plant resistance inducers
Algal compounds exhibit great potential to enhance plant growth and resistance to abiotic and biotic stresses. This review focuses on aspects concerning the physical-chemical properties, function and biological activity of macroalgae polysaccharides. Updated results of the main poly- and oligosaccharides studied for the control of plant diseases are discusse
Trop. plant pathol.. Publicado em: 2014-04
-
2. Structure versus anticoagulant and antithrombotic actions of marine sulfated polysaccharides
Marine sulfated polysaccharides (MSP), such as sulfated fucans (SF), sulfated galactans (SG) and glycosaminoglycans (GAG) isolated from either algae or invertebrate animals, are highly anionic polysaccharides capable of interacting with certain cationic proteins, such as (co)-factors of the coagulation cascade during clotting-inhibition processes. These mole
Revista Brasileira de Farmacognosia. Publicado em: 24/05/2012
-
3. Sulfated fucans extracted from algae Padina gymnospora have anti-inflammatory effect
Sulfated polysaccharides were extracted with acetone from brown algae Padina gymnospora. The fraction precipitated with 1.5 volumes of acetone (F1.5) purified in Sephadex G-75 was characterized by infrared and nuclear magnetic resonance of 13C and ¹H, through which the presence of sulfate groups on the C4 of α-L-fucose could be observed. This polysaccharid
Revista Brasileira de Farmacognosia. Publicado em: 21/11/2011
-
4. A carbohydrate-based mechanism of species recognition in sea urchin fertilization
In the present review, we describe a systematic study of the sulfated polysaccharides from marine invertebrates, which led to the discovery of a carbohydrate-based mechanism of sperm-egg recognition during sea urchin fertilization. We have described unique polymers present in these organisms, especially sulfated fucose-rich compounds found in the egg jelly c
Brazilian Journal of Medical and Biological Research. Publicado em: 2007-01
-
5. Atividade antiinflamatória de uma heterofucana da alga marrom Padina gymnospora
Fucanas, polissacarídeos sulfatados extraídos de alga marrom e alguns equinodermos, têm sido extensivamente estudadas devido as suas diversas atividades biológicas e pela sua interferência com mecanismos moleculares de reconhecimento celular, incluindo o tráfego de leucócitos dos vasos sanguíneos para o interior de sítios inflamatórios medi
Publicado em: 2007
-
6. Ação de polissacarídeos sulfatados de Fucus Vesiculosus na Hemostasia e no sistema complemento
Fucans are a family of sulfated homo and teropolysaccharides respectively, composed mainly of a- (12) and a- (13) linked by L-fucose residues. Properties such as the ability to act as an anti-contraceptive, to reduce cholesterol levels, and to act as an anti-tumor agent are much related. We have focused our attention on the anticoagulant properties, platelet
Publicado em: 2006
-
7. Partial characterization and anticoagulant activity of a heterofucan from the brown seaweed Padina gymnospora
The brown algae Padina gymnospora contain different fucans. Powdered algae were submitted to proteolysis with the proteolytic enzyme maxataze. The first extract of the algae was constituted of polysaccharides contaminated with lipids, phenols, etc. Fractionation of the fucans with increasing concentrations of acetone produced fractions with different proport
Brazilian Journal of Medical and Biological Research. Publicado em: 2005-04
-
8. Purificação e caracterização parcial de uma Fucana C de Dictyota mentrualis e estudo do seu efeito antiinflamatório e nociceptivo
In recent years, sulfated polysaccharides from marine algae have emerged as an important class of natural biopolymers with potential application in human and veterinary health care, while taking advantage of the absence of potential risk of contamination by animal viruses. Among these, fucans isolated from the cell walls of marine brown alga have been study
Publicado em: 2005
-
9. Heterofucans from Dictyota menstrualis have anticoagulant activity
Fucan is a term used to denote a family of sulfated L-fucose-rich polysaccharides which are present in the extracellular matrix of brown seaweed and in the egg jelly coat of sea urchins. Plant fucans have several biological activities, including anticoagulant and antithrombotic, related to the structural and chemical composition of polysaccharides. We have e
Brazilian Journal of Medical and Biological Research. Publicado em: 2004-02
-
10. A fucan from the brown seaweed Spatoglossum schröederi inhibits Chinese hamster ovary cell adhesion to several extracellular matrix proteins
Fucans, a family of sulfated polysaccharides present in brown seaweed, have several biological activities. Their use as drugs would offer the advantage of no potential risk of contamination with viruses or particles such as prions. A fucan prepared from Spatoglossum schröederi was tested as a possible inhibitor of cell-matrix interactions using wild-type Ch
Brazilian Journal of Medical and Biological Research. Publicado em: 2001-05
-
11. Cell Wall Assembly in Fucus Zygotes: I. Characterization of the Polysaccharide Components 12
Fertilization triggers the assembly of a cell wall around the egg cell of three brown algae, Fucus vesiculosus, F. distichus, and F. inflatus. New polysaccharide polymers are continually being added to the cell wall during the first 24 hours of synchronous embryo development. This wall assembly involves the extracellular deposition of fibrillar material by c
-
12. Mobilization of stem/progenitor cells by sulfated polysaccharides does not require selectin presence
Employing carbohydrate ligands, which have been extensively used to block selectin function in vitro and in vivo, we have examined the involvement of such ligands in stem/progenitor cell mobilization in mice and monkeys. We found that sulfated fucans, branched and linear, are capable of increasing mature white cells in the periphery and mobilizing stem/proge
National Academy of Sciences.