Biomimetics of silver nanoparticles by white rot fungus, Phaenerochaete chrysosporium

Vigneshwaran, N.; Kathe, A A; Varadarajan, P. V.; Nachane, R. P.; Balasubramanya, R. H.

doi:10.1016/j.colsurfb.2006.07.014

Cited by 348 publications

(121 citation statements)

References 18 publications

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“…31,46,47 Different studies have discussed the fabrication of AgNPs based on fungi-assisted bioreduction processes, as well as their antibacterial activities. 20,48,49 The fungus Fusarium sp. can reduce aqueous silver ions extracellularly to generate AgNPs.…”

Section: Biosynthesis and Characterization Of Agnpsmentioning

confidence: 99%

In vitro and in vivo evaluation of biologically synthesized silver nanoparticles for topical applications: effect of surface coating and loading into hydrogels

Mekkawy

El‐Mokhtar²,

Nafady

et al. 2017

IJN

158

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In the present study, silver nanoparticles (AgNPs) were synthesized via biological reduction of silver nitrate using extract of the fungus Fusarium verticillioides (green chemistry principle). The synthesized nanoparticles were spherical and homogenous in size. AgNPs were coated with polyethylene glycol (PEG) 6000, sodium dodecyl sulfate (SDS), and β-cyclodextrin (β-CD). The averaged diameters of AgNPs were 19.2±3.6, 13±4, 14±4.4, and 15.7±4.8 nm, for PEG-, SDS-, and β-CD-coated and uncoated AgNPs, respectively. PEG-coated AgNPs showed greater stability as indicated by a decreased sedimentation rate of particles in their water dispersions. The antibacterial activities of different AgNPs dispersions were investigated against Gram-positive bacteria (methicillin-sensitive and methicillin-resistant Staphylococcus aureus ) and Gram-negative bacteria ( Escherichia coli ) by determination of the minimum inhibitory concentrations (MICs) and minimum bactericidal concentrations (MBCs). MIC and MBC values were in the range of 0.93–7.5 and 3.75–15 µg/mL, respectively, which were superior to the reported values in literature. AgNPs-loaded hydrogels were prepared from the coated-AgNPs dispersions using several gelling agents (sodium carboxymethyl cellulose [Na CMC], sodium alginate, hydroxypropylmethyl cellulose, Pluronic F-127, and chitosan). The prepared formulations were evaluated for their viscosity, spreadability, in vitro drug release, and antibacterial activity, and the combined effect of the type of surface coating and the polymers utilized to form the gel was studied. The in vivo wound-healing activity and antibacterial efficacy of Na CMC hydrogel loaded with PEG-coated AgNPs in comparison to the commercially available silver sulfadiazine cream (Dermazin ® ) were evaluated. Superior antibacterial activity and wound-healing capability, with normal skin appearance and hair growth, were demonstrated for the hydrogel formulations, as compared to the silver sulfadiazine cream. Histological examination of the treated skin was performed using light microscopy, whereas the location of AgNPs in the skin epidermal layers was visualized using transmission electron microscopy.

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Section: Biosynthesis and Characterization Of Agnpsmentioning

confidence: 99%

In vitro and in vivo evaluation of biologically synthesized silver nanoparticles for topical applications: effect of surface coating and loading into hydrogels

Mekkawy

El‐Mokhtar²,

Nafady

et al. 2017

IJN

158

View full text Add to dashboard Cite

show abstract

“…A nitrate-dependent reductase enzyme might act as the reducing agent. The white rot fungus, Phanerochaete chrysosporium, also reduced silver ions to form nano-silver particles (Vigneshwaran et al 2006a). The most dominant morphology was pyramidal shape, in different sizes, but hexagonal structures were also observed.…”

Section: Synthesis Of Silver Nanoparticles By Fungimentioning

confidence: 99%

Silver Nanoparticles

Korbekandi¹,

Iravani²

2012

The Delivery of Nanoparticles

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“…(Ahmad et al, 2005) produced extracellular gold nanoparticles with spherical, triangular and hexagonal morphologies with 5 to 200 nm in size. It was also intriguing to observe that the silver nanoparticles produced by T. asperellum (Mukherjee et al 2008), T. viride (Fayaz et al, 2010), F. oxysporum (Senapati et al, 2004), P. chrysosporium (Vigneshwaran et al, 2006), F. solani , F. semitectum (Basavaraja et al, 2008), F. acuminatum , A. fumigatus (Bhainsa and D'Souza, 2006), C. versicolor (Sanghi and Verma, 2009), A. niger , P. glomerata (Birla et al, 2009), P. brevicompactum (Shaligram et al, 2009), C. cladosporioides (Balaji et al, 2009), P. fellutanum ) and V. volvacea (Philip, 2009) were predominantly spherical with pyramidal, rod-like and triangular morphologies in the size of 5 to 200 nm.…”

Section: Introductionmentioning

confidence: 99%

Biosynthesis, optimization, purification and characterization of gold nanoparticles

Waghmare¹,

Deshmukh²,

Sadowski³

2014

Afr. J. Microbiol. Res.

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Many microorganisms produce intracellular metal nanoparticles. Aqueous gold, when exposed to several actinomycetal strains, become thereby, leading to the formation of gold nanoparticles. The use of microorganisms in the synthesis of nanoparticles is emerging as an eco-friendly and exciting approach gold for recovery. Streptomyces hygroscopicus was used for the biosynthesis of gold nanoparticles. UV and visible spectroscopic studies of biofilms revealed better synthesis of nanoparticles. It was observed that better biosynthesis of gold nanoparticles occurred when cell biomass treated with 10 -3 and 10 -4 mM HAuCl 4 solution as compared to other dilutions. The pH 7.0 was found to be optimum for the biosynthesis of gold nanoparticles. The TEM study revealS that there was evidence of gold nanoparticles synthesized by S. hygroscopicus. The results demonstrate that spherical gold nanoparticles in the range of 10 to 20 nm were observed at pH value of 7.0. The actinomycetal biomass and various concentration of aqueous HAuCl 4 solution were incubated, it was found that 10 -4 concentration shows excellent colour of the actinomycetal biomass.

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Biomimetics of silver nanoparticles by white rot fungus, Phaenerochaete chrysosporium

Cited by 348 publications

References 18 publications

In vitro and in vivo evaluation of biologically synthesized silver nanoparticles for topical applications: effect of surface coating and loading into hydrogels

In vitro and in vivo evaluation of biologically synthesized silver nanoparticles for topical applications: effect of surface coating and loading into hydrogels

Silver Nanoparticles

Biosynthesis, optimization, purification and characterization of gold nanoparticles

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