Characterization, antimicrobial and antioxidant property of exopolysaccharide mediated silver nanoparticles synthesized by Streptomyces violaceus MM72

Sivasankar, Palaniappan; Seedevi, Palaniappan; Poongodi, Subramaniam; Sivakumar, Murugesan; Murugan, Tamilselvi; Loganathan, Sivakkanan; Sivakumar, K.; Balasubramanian, T.

doi:10.1016/j.carbpol.2017.11.082

Cited by 109 publications

(50 citation statements)

References 48 publications

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“…The TEM image showed that the AgNPs from levan were almost spherical with an average diameter of 19.47 ± 2.45 nm (Figure 3(b,c)). Though the size was larger than that reported by Ahmed et al [17], our AgNPs from levan had a smaller diameter than the AgNPs synthesised from exopolysaccharides of Leuconostoc lactis KC117496, Streptomyces violaceus MM72 and Cs-Hk fungal cultures [26][27][28]. It was speculated the molecular dimension of these exopolysaccharides might be one cause of the different size of their AgNPs.…”

Section: Characterisation Of Agnpscontrasting

confidence: 48%

Bacillus amyloliquefaciens levan and its silver nanoparticles with antimicrobial properties

Zhang

Yue

Zeng

et al. 2018

Biotechnology & Biotechnological Equipment

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In this study, the exopolysaccharide from Bacillus amyloliquefaciens PB6 was purified and identified as levan. To explore the application of this levan in nanotechnology, its silver nanoparticles (AgNPs) were prepared in a simple and green method. Transmission electron microscopy analysis revealed that the size of the synthesised AgNPs was in the range of 19.47 ± 2.45 nm. X-ray powder diffraction analysis confirmed the face-centred cubic crystalline structure of metallic silver. Moreover, the AgNPs at the concentration of 0-12 lg/mL exhibited a significant inhibitive effect on Staphylococcus aureus and Escherichia coli. Tested by tetrazolium-based colourimetric assay, the viability of RAW 264.7 cells was higher than 75% in the presence of 20 lg/mL AgNPs. The results not only proved the feasibility of producing levan from B. amyloliquefaciens with high safety and a high yield, but also demonstrated the simple and cost-efficient approach of AgNPs synthesis as potential antibacterial agents from levan.

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Section: Characterisation Of Agnpscontrasting

confidence: 48%

Bacillus amyloliquefaciens levan and its silver nanoparticles with antimicrobial properties

Zhang

Yue

Zeng

et al. 2018

Biotechnology & Biotechnological Equipment

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“…Mittal [ 157 ] and his co-workers published a study dealing with the synthesis of AgNPs using Syzygium cumini extract. They observed that the reduction of silver ions and stabilization of prepared AgNPs were mainly because of the action of flavonoids.…”

Section: Silver Nanoparticles and Antioxidant Activity Propertiesmentioning

confidence: 99%

A Brief Overview on Antioxidant Activity Determination of Silver Nanoparticles

et al. 2020

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Our objective in this review article is to find out relevant information about methods of determination of antioxidant activity of silver nanoparticles. There are many studies dealing with mentioned problem and herein we summarize the knowledge about methods evaluating the antioxidant activity of silver nanoparticles reported so far. Many authors declare better antioxidant activity of silver nanoparticles compared to the extract used for synthesis of them. In this review, we focused on methods of antioxidant activity determination in detail to find out novel and perspective techniques to solve the general problems associated with the determination of antioxidant activity of silver nanoparticles.

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“…Bacterial EPSs are high molecular weight carbohydrate polymers, composed of monosaccharides (units) linked together by glycosylic linkages, which are closely attached to the bacterial surface or are released into the surrounding environment (Zeidan et al, 2017). EPSs produced by LAB have been reported to exhibit antioxidant (Sivasankar et al, 2018), antitumoral (Rajoka et al, 2018), and immunological activities (Mitsuoka, 1992;Nagai et al, 2011); cholesterol-lowering and antibiofilm properties (Mahdhi et al, 2017); and can improve the intestinal flora balance (Castro-Bravo et al, 2018). Among these health benefits, the antitumoral activity of EPSs has attracted increasing attention because of the enhanced number and incidence of cancer.…”

Section: Introductionmentioning

confidence: 99%

Genetic and Biochemical Characterization of an Exopolysaccharide With in vitro Antitumoral Activity Produced by Lactobacillus fermentum YL-11

Wei

Li³

et al. 2019

Front. Microbiol.

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In the present study, the whole genome sequence of Lactobacillus fermentum YL-11, a novel exopolysaccharide (EPS)-producing lactic acid bacteria (LAB) strain isolated from fermented milk, was determined. Genetic information and the synthetic mechanism of the EPS in L. fermentum YL-11 were identified based on bioinformatic analysis of the complete genome. The purified EPS of YL-11 mainly comprised galactose (48.0%), glucose (30.3%), mannose (11.8%), and arabinose (6.0%). In vitro, the EPS from YL-11 exhibited inhibition activity against HT-29 and Caco-2 colon cancer cells, suggesting that EPS from strain YL-11 might be used as an antitumoral agent. EPS at 600 and 800 µg/mL achieved inhibition rates of 46.5 ± 3.5% and 45.6 ± 6.1% to HT-29 cells, respectively. The genomic information about L. fermentum YL-11 and the antitumoral activity of YL-11 EPS provide a theoretical foundation for the future application of EPS in the food and pharmaceutical industries.

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Characterization, antimicrobial and antioxidant property of exopolysaccharide mediated silver nanoparticles synthesized by Streptomyces violaceus MM72

Cited by 109 publications

References 48 publications

Bacillus amyloliquefaciens levan and its silver nanoparticles with antimicrobial properties

Bacillus amyloliquefaciens levan and its silver nanoparticles with antimicrobial properties

A Brief Overview on Antioxidant Activity Determination of Silver Nanoparticles

Genetic and Biochemical Characterization of an Exopolysaccharide With in vitro Antitumoral Activity Produced by Lactobacillus fermentum YL-11

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