<i>In vitro</i> antioxidant, antimicrobial, cytotoxic potential of gold and silver nanoparticles prepared using <i>Embelia ribes</i>

Dhayalan, Manikandan; Jesse, Denison Michael Immanuel; L, Anitha Jegadeeshwari; Kathiravan, K.; N, Nagendra Gandhi

doi:10.1080/14786419.2016.1166499

Cited by 43 publications

(29 citation statements)

References 14 publications

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“…Ascorbic acid that was used as standard yielded DPPH scavenging activities of 39.03–64.42% at concentrations of 2–10 μg/ml. There is dearth of information on antioxidant activities of Ag‐AuNPs, however the results herein reported are similar to those reported for the monometallic Ag and AuNPs …”

Section: Resultssupporting

confidence: 86%

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Silver‐gold alloy nanoparticles biofabricated by fungal xylanases exhibited potent biomedical and catalytic activities

Elegbede

Lateef

Azeez

et al. 2019

Biotechnology Progress

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The search for biocompatible nanoparticles with vast applicability has impacted on exploration of various biomaterials for the synthesis of mono and bimetallic nanoparticles. Xylanase is widely regarded as an industrially important enzyme but its potentials in nanotechnological applications are yet to be fully explored. The current study investigates the exploit of xylanases of Aspergillus niger L3 (NE) and Trichoderma longibrachiatum L2 (TE) produced through valorization of corn‐cob, to synthesize silver‐gold alloy nanoparticles (Ag‐AuNPs). Characterization of the Ag‐AuNPs involved UV–vis spectroscopy, Fourier transform infrared spectroscopy (FTIR), and field emission scanning electron microscopy and transmission electron microscopy, while their prospective use as antimicrobial, antioxidant, catalytic, anticoagulant, and thrombolytic agents were studied. The biosynthesized Ag‐AuNPs were ruby red and light purple with surface plasmon resonance at 520 and 534 nm for NEAg‐AuNPs and TEAg‐AuNPs, respectively; while FTIR showed that protein molecules capped and stabilized the nanoparticles. The Ag‐AuNPs were anisotropic with spherical, oval, and irregular shapes having sizes ranging from 6.98 to 52.51 nm. The nanoparticles appreciably inhibited the growth of tested clinical bacteria (23.40–90.70%) and fungi (70.10–89.05%), and also scavenged 2,2‐diphenyl‐1‐picrylhydrazyl (48.51–53.79%) and hydrogen peroxide (80.5–95.50%). Furthermore, the Ag‐AuNPs degraded malachite green (91.39%) and methylene blue (47.10%). Moreover, the Ag‐AuNPs displayed outstanding anticoagulant and thrombolytic activities using human blood. This study further emphasizes the significance of xylanases in nanobiotechnology as it has established the potential of xylanases to synthesize Ag‐AuNPs, which is being reported for the first time.

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Section: Resultssupporting

confidence: 86%

“…There is dearth of information on antioxidant activities of Ag-AuNPs, however the results herein reported are similar to those reported for the monometallic Ag and AuNPs. 7,17,52,73,84,85 3.6.2 | Hydrogen peroxide scavenging activities…”

Section: Dpph Free Radical Scavenging Activitiesmentioning

confidence: 99%

Silver‐gold alloy nanoparticles biofabricated by fungal xylanases exhibited potent biomedical and catalytic activities

Elegbede

Lateef

Azeez

et al. 2019

Biotechnology Progress

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“…Gold nanoparticles (AuNPs) are recently gaining a great interest due to their potential application in many fields, such as catalysis, biosensing, photonics, drug-delivery systems, and antimicrobial agents [ 13 , 14 , 15 , 16 , 17 , 18 , 19 ]. They also have been used to catalyze electron-transfer and oxidation reactions, specifically glucose oxidation [ 20 ], aerobic alcohol oxidation [ 21 ], reduction of nitroarenes in aqueous media [ 22 ], or CO oxidation and propylene epoxidation [ 23 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Phenolic Compounds on the Synthesis of Gold Nanoparticles and its Catalytic Activity in the Reduction of Nitro Compounds

et al. 2018

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Gold nanoparticles (AuNPs) were prepared using an eco-friendly approach in a single step by reduction of HAuCl4 with polyphenols from tea extracts, which act as both reducing and capping agents. The obtained AuNPs were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), ultraviolet–visible spectroscopy (UV–vis), and X-ray photoelectron spectroscopy (XPS). They act as highly efficient catalysts in the reduction of various aromatic nitro compounds in aqueous solution. The effects of a variety of factors (e.g., reaction time, type and amount of reducing agent, shape, size, or amount of AuNPs) were studied towards the optimization of the processes. The total polyphenol content (TPC) was determined before and after the catalytic reaction and the results are discussed in terms of the tea extract percentage, the size of the AuNPs, and their catalytic activity. The reusability of the AuNP catalyst in the reduction of 4-nitrophenol was also tested. The reactions follow pseudo first-order kinetics.

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“…Various plants are utilized for the synthesis of gold and silver, which include Parkia Speciose, Pelargonium endlicherianum, Fraxinus excelsior, Embelia ribes. Nat Prod Res, Zingiberofficinale and Galaxaura elongata [21][22][23][24][25][26]. Studies have shown that nanoparticles yielded through plant extracts are capped by plant metabolites as well as carbohydrates and proteins, bringing about more stability and biocompatibility of the particles as well as less environmental challenges [27].…”

Section: Physical Methods Includingmentioning

confidence: 99%

Bio-fabrication of silver nanoparticles using naturally available wild herbaceous plant and its antibacterial activity

Mohammadi

Ghasemi

Ramezani

2020

Eurasian Chem. Commun.

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The irrational use of antibiotics has caused an increment in bacterial resistance to these compounds, leading humans to go in quest of alternative effective antimicrobial factors with less side effects as compared to antimicrobial compounds with less unwanted side effects. Silver Nanoparticles (AgNPs) could be considered as one of the most important antibacterial agents. In this study, the aqueous extract of Fumaria officinalis leaf was prepared and used in optimal conditions(pH=10, extract volume=8, metal salt concentration=10 mM, temperature 100 °C and time=120 min) for reduction of silver ions and synthesis of AgNPs. The resulted AgNPs were characterized by different techniques including UV-Vis, and XRD, FESEM, TEM, EDX and FTIR, respectively. Finally, the antibacterial activity of AgNPs on two pathogens (Escherichia coli (PTTC 1707), and Staphylococcus aureus (PTTC 1112)), was investigated using agar disk diffusion and minimum inhibitory concentration (MIC) test. The extract of Fumaria officinalis displayed high potential to synthesize stable spherical AgNPs in shape with size below 25 nm. The nanoparticles showed considerable antibacterial effect on two tested bacteria. The minimum inhibitory concentration on Escherichia coli and Staphylococcus aureus for AgNPs was 12.5 and 6.25 μg / mL, respectively.

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In vitro antioxidant, antimicrobial, cytotoxic potential of gold and silver nanoparticles prepared using Embelia ribes

Cited by 43 publications

References 14 publications

Silver‐gold alloy nanoparticles biofabricated by fungal xylanases exhibited potent biomedical and catalytic activities

Silver‐gold alloy nanoparticles biofabricated by fungal xylanases exhibited potent biomedical and catalytic activities

Effect of Phenolic Compounds on the Synthesis of Gold Nanoparticles and its Catalytic Activity in the Reduction of Nitro Compounds

Bio-fabrication of silver nanoparticles using naturally available wild herbaceous plant and its antibacterial activity

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