Structural characteristics and antioxidant activities of the extracellular polysaccharides produced by marine bacterium Edwardsiella tarda

Guo, Shoudong; Mao, Wenjun; Yin, Heng; Zhang, Xiaohua; Yang, Chunli; Chen, Yin; Chen, Yanli; Xu, Jian; Li, Hongyan; Qi, Xiaohui; Xu, Jiachao

doi:10.1016/j.biortech.2010.01.125

Cited by 94 publications

(50 citation statements)

References 22 publications

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“…Several studies have shown that microbial polysaccharides act as an effective antioxidant [ 25,15,17,24], but very limited information is available on the antioxidant mechanisms of the exopolysaccharides action at molecular level [6,26].…”

Section: Discussionmentioning

confidence: 99%

Antioxidant and Antimicrobial Activities of Exopolysaccharides from Yoghurt Starter

Ghalem¹

2017

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Abstract:The in vitro antimicrobial and antioxidant activities of the exopolysaccharide (EPS) extracted from yoghurt starter were investigated. Antimicrobial activity tests were carried out using disc diffusion methods with Escherichia coli, Staphylococcus aureus and Streptococcus D, Proteus spp and the yeast of Candida albicans. The antioxidant properties were evaluated using the test of DPPH free radical trapping. The results show that the EPS has weak antimicrobial activity against the tested strains with inhibitions zones ranging from 9 to 13 mm. EPS could reduce the free radical (DPPH) to diphenylpicrylhydrazine a yellow-colored at 24.25% showing antioxidant activity less than that of ascorbic acid which was 69.79%.

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Section: Discussionmentioning

confidence: 99%

Antioxidant and Antimicrobial Activities of Exopolysaccharides from Yoghurt Starter

Ghalem¹

2017

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“…Moreover, large attention has been devoted to these molecules because of their bioactive role; in fact, bacterial EPSs have also received an increasing pharmaceutical interest as antitumor, antiviral, immune-stimulatory, and antiinflammatory agents (Arena et al 2006;Arena et al 2009). The antioxidant power of the EPSs has also been pointed out by several authors (Priyanka et al 2014;Sun et al 2014), and EPSs having antioxidant activity could be used as food supplements or as protective agents in pharmaceutics (Guo et al 2010).…”

Section: Introductionmentioning

confidence: 96%

Production and properties of an exopolysaccharide synthesized by the extreme halophilic archaeon Haloterrigena turkmenica

Squillaci

Finamore

Paola

et al. 2015

Appl Microbiol Biotechnol

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We have isolated a novel exopolysaccharide (EPS) produced by the extreme halophilic archaeon Haloterrigena turkmenica. Some features, remarkable from an industrial point of view, such as emulsifying and antioxidant properties, were investigated. H. turkmenica excreted 20.68 mg of EPS per 100 ml of culture medium when grown in usual medium supplemented with glucose. The microorganism excreted the biopolymer mainly in the middle exponential growth phase and reached the maximal production in the stationary phase. Analyses by anion exchange chromatography and SEC-TDA Viscotek indicated that the EPS was composed of two main fractions of 801.7 and 206.0 kDa. It was a sulfated heteropolysaccharide containing glucose, galactose, glucosamine, galactosamine, and glucuronic acid. Studies performed utilizing the mixture of EPS anionic fractions showed that the biopolymer had emulsifying activity towards vegetable oils comparable or superior to that exhibited by the controls, moderate antioxidant power when tested with 2,2'-diphenyl-1-picrylhydrazyl (DPPH(·)), and moisture-retention ability higher than hyaluronic acid (HA). The EPS from H. turkmenica is the first exopolysaccharide produced by an archaea to be characterized in terms of properties that can have potential biotechnological applications.

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“…As we have learned, oxidation is essential to many organisms for the production of energy to fuel biological processes. However, reactive oxygen species (ROS) are often overproduced under pathological conditions (Guo et al 2010), thus leading to increased risk of chronic disease. Antioxidants have been shown to inactivate ROS and thus protect from oxidative damage.…”

Section: Antioxidant Activitiesmentioning

confidence: 99%

Polysaccharides from Medicinal Mushrooms and Their Antitumor Activities

Chen¹,

Li²

2015

Polysaccharides

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Structural characteristics and antioxidant activities of the extracellular polysaccharides produced by marine bacterium Edwardsiella tarda

Cited by 94 publications

References 22 publications

Antioxidant and Antimicrobial Activities of Exopolysaccharides from Yoghurt Starter

Antioxidant and Antimicrobial Activities of Exopolysaccharides from Yoghurt Starter

Production and properties of an exopolysaccharide synthesized by the extreme halophilic archaeon Haloterrigena turkmenica

Polysaccharides from Medicinal Mushrooms and Their Antitumor Activities

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