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Antiviral Activities of Sulfated Polysaccharides Isolated from Sphaerococcus coronopifolius (Rhodophytha, Gigartinales) and Boergeseniella thuyoides (Rhodophyta, Ceramiales) ArchiMer
Bouhlal, Rhimou; Haslin, Camille; Chermann, Jean-claude; Colliec-jouault, Sylvia; Sinquin, Corinne; Simon, Gaelle; Cerantola, Stephane; Riadi, Hassane; Bourgougnon, Nathalie.
Water-soluble sulfated polysaccharides isolated from two red algae Sphaerococcus coronopifolius (Gigartinales, Sphaerococcaceae) and Boergeseniella thuyoides (Ceramiales, Rhodomelaceae) collected on the coast of Morocco inhibited in vitro replication of the Human Immunodeficiency Virus (HIV) at 12.5 mu g/mL. In addition, polysaccharides were capable of inhibiting the in vitro replication of Herpes simplex virus type 1 (HSV-1) on Vero cells values of EC(50) of 4.1 and 17.2 mu g/mL, respectively. The adsorption step of HSV-1 to the host cell seems to be the specific target for polysaccharide action. While for HIV-1, these results suggest a direct inhibitory effect on HIV-1 replication by controlling the appearance of the new generations of virus and...
Tipo: Text Palavras-chave: Herpes simplex virus; Human immunodeficiency virus; Antiviral activity; Sulfated polysaccharide; S. coronopifolius; B. thuyoides; Chemical composition.
Ano: 2011 URL: http://archimer.ifremer.fr/doc/00060/17120/14631.pdf
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Structural data on a bacterial exopolysaccharide produced by a deep-sea Alteromonas macleodii strain ArchiMer
Le Costaouec, Tinaig; Cerantola, Stephane; Ropartz, D.; Ratiskol, Jacqueline; Sinquin, Corinne; Colliec-jouault, Sylvia; Boisset, Claire.
Some marine bacteria collected around deep-sea hydrothermal vents are able to produce, in laboratory conditions, complex and innovative exopolysaccharides. In a previous study, the mesophilic strain Alteromonas macleodii subsp. fijiensis biovar deepsane was collected on the East Pacific Rise at 2600m depth. It was isolated from a polychaete annelid Alvinella pompejana and is able to synthesise and excrete the exopolysaccharide deepsane. Biological activities have been screened and some protective properties have been established. Deepsane is commercially available in cosmetics under the name of Abyssine (R) for soothing and reducing irritation of sensitive skin against chemical, mechanical and UVB aggression. This study presents structural data for this...
Tipo: Text Palavras-chave: Bacterial exopolysaccharide; Alteromonas macleodii; Structure determination; NMR spectroscopy; Mass spectrometry.
Ano: 2012 URL: http://archimer.ifremer.fr/doc/00095/20620/18536.pdf
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The marine bacteria Cobetia marina DSMZ 4741 synthesizes an unexpected K-antigen-like exopolysaccharide ArchiMer
Lelchat, Florian; Cerantola, Stephane; Brandily, Christophe; Colliec-jouault, Sylvia; Baudoux, Anne-claire; Ojima, Takao; Boisset, Claire.
We have studied the exopolysaccharide produced by Cobetia marina DSMZ 4741, a marine bacterium isolated from coastal seawater. This strain is able to produce a polysaccharide in presence of carbon sources as glucose, mannitol and alginate. The maximum production occurs in aerobic condition, during the end of the exponential phase. The polymer is a non-viscous, acidic heteropolysaccharide of 270 kDa constituted of a repeating unit of: →2)-β-D-Ribf-(1→4)-[7,8-O-(Pyr)]-α-D-KDOp-(2→ This kind of chemical structure is generally related to K-antigen polysaccharide of pathogenic Escherichia coli strains. This is the first time this type of EPS is described from a marine bacterium. Moreover the polysaccharide exhibits a pyruvate substitution on its...
Tipo: Text Palavras-chave: Bacterial exopolysaccharides; K-antigen; Cobetia marina; KDO; Marine polysaccharide.
Ano: 2015 URL: https://archimer.ifremer.fr/doc/00254/36494/35038.pdf
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Sunscreen, antioxidant, and bactericide capacities of phlorotannins from the brown macroalga Halidrys siliquosa ArchiMer
Le Lann, Klervi; Surget, Gwladys; Couteau, Celine; Coiffard, Laurence; Cerantola, Stephane; Gaillard, Fanny; Larnicol, Maud; Zubia, Mayalen; Guerard, Fabienne; Poupart, Nathalie; Stiger-pouvreau, Valerie.
The present study focused on a brown macroalga (Halidrys siliquosa), with a particular emphasis on polyphenols and their associated biological activities. Two fractions were obtained by liquid/liquid purification from a crude hydroethanolic extract: (i) an ethyl acetate fraction and (ii) an aqueous fraction. Total phenolic contents and antioxidant activities of extract and both fractions were assessed by in vitro tests (Folin-Ciocalteu test, 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity, reducing power assay, superoxide anion scavenging assay, and beta-carotene-linoleic acid system). For the most active fraction, i.e., the ethyl acetate fraction, the oxygen radical absorbance capacity (ORAC) value, antibacterial activities, and sunscreen...
Tipo: Text Palavras-chave: Antioxidant; Bactericidal; Phenolic compounds; Phaeophyceae; Seaweed; ORAC value; Sunscreen potential.
Ano: 2016 URL: https://archimer.ifremer.fr/doc/00366/47682/47970.pdf
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