Fungus mediated synthesis of gold nanoparticles and their conjugation with genomic DNA isolated from Escherichia coli and Staphylococcus aureus

Mishra, Amrita; Tripathy, Suraj K.; Yun, Soon‐Il

doi:10.1016/j.procbio.2012.01.017

Cited by 107 publications

(47 citation statements)

References 41 publications

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“…Surfactant assisted method has been used for the synthesis of partially functionalized gold nanoparticles by using a bifuntional ligand hexadecyl trimethyl ammonium bromide (CTAB) as linker between solid substrate and gold nanoparticles [9]. Hot injection technique is reported to synthesized gold nanoparticles by using different surfactants such as oleylamine, 1-octadecanethiol, poly (N-vinylpyrrolidone), and AgNO 3 in 1,5-pentanediol to stabilize the colloidal solution.…”

Section: Chemical Methodsmentioning

confidence: 99%

“…Gold nanoparticles have unique electric and magnetic properties due to their shape and size so they have been received great attention in research areas especially in the field of biological tagging, chemical and biological sensing, optoelectronics, photo thermal therapy, biomedical imaging, DNA labelling [1], microscopy and photoacutisc imaging [3], surface-enhanced Raman spectroscopy, tracking and drug delivery, catalysis [5] and cancer therapy [9] (Table 1).…”

Section: Applications Of Nanoparticlesmentioning

confidence: 99%

“…Main properties of nanoparticles to be an effective drug delivery agent includes monodispersity, lack of cytotoxicity and simple mechanism of interaction with desired ligands. One the basis of these characteristics many nanoparticles have been synthesized and used in cancer treatment, drug delivery systems and imaging such as dendrimers, quantum dots, polymer gels, gold nanoparticles, ZnO, or Fe 2 O 3 [9]. Various chemical and physical methods have been adapted for the synthesis of nanoparticles which are quite expensive and the chemicals used are harmful to the environment.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Gold Nanoparticles: Synthesis and Applications in Drug Delivery

Ak¹,

Rashid²,

Murtaza³

et al. 2014

Trop. J. Pharm Res

386

163

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This review is focused essentially on the synthesis and applications of gold nanoparticles in the field of medicine and targeted drug delivery. Nanotechnology has become one of the most interesting and advanced areas of research in this field. Among nanoparticles, gold nanoparticles demonstrate special advantages in this field due to their unique properties, small size and high surface area-to-volume ratio.These particles have been widely used in various biomedical applications and drug delivery systems due to their inert nature, stability, high dispersity, non-cytotoxicity and biocompatibility.

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Section: Chemical Methodsmentioning

confidence: 99%

Section: Applications Of Nanoparticlesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Gold Nanoparticles: Synthesis and Applications in Drug Delivery

Ak¹,

Rashid²,

Murtaza³

et al. 2014

Trop. J. Pharm Res

386

163

View full text Add to dashboard Cite

show abstract

“…The production of Au@NPs by both strains decreased dramatically at pH 6. The value of pH was considered an important factor for gold reduction and nanoparticle formation (Mishra et al 2012), as the different pH values affect the zeta potential, thus influenced the electric properties on the cell surface to form nanoparticles. The effect of pH was consistent with the results of S. haliotis, which has an optimal pH of 5 (Zhu et al 2016).…”

Section: Effect Of Phmentioning

confidence: 99%

Biofabrication of gold nanoparticles by Shewanella species

2017

Bioresour. Bioprocess.

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Background: Shewanella oneidensis MR-1 (MR-1) and Shewanella xiamenensis BC01 (SXM) are facultative anaerobic bacteria that exhibit outstanding performance in the dissimilatory reduction of metal ions. Shewanella species have been reported to produce metal nanoparticles, but the mechanism and optimization are still not extensively studied and clearly understood. Herein, the effects of pH, biomass, gold ion concentration, and photoinduction are evaluated to optimize gold nanoparticle (Au@NP) production by Shewanella. Results:The highest amount of Au@NPs produced by SXM and MR-1 were 108 and 62 ppm, respectively, at pH 5 when 2.4 g/L biomass was immersed in 300 ppm gold ions and 50 mM lactate under a light intensity of 100 µmol/ m 2 /s. By scanning election microscopy and zeta potential analysis, the proposed mechanism of Au@NP formation was that Shewanella used lactate as electron donors for the Mtr pathway, stimulated by photosensitive proteins resulting in the nucleation of NPs on the cell membrane. Besides, the resting cells retained the ability for biofabrication of nanoparticles for nearly 25 days. Conclusions:The optimal conditions evaluated for Au@NPs production by Shewanella were biomass, pH, ions concentration, and photoinduction. To the best of our knowledge, this is the first attempt to explore a two-step mechanism for Au@NPs formation in Shewanella. First, the HAuCl 4 solution reacted with sodium lactate to form metallic gold ions. Second, the metallic gold ions were adsorbed onto the outer membrane of cell, and the formation of Au@NPs at the surface was triggered. Shewanella-based Au@NPs production could be a potential ecofriendly solution for the recovery of Au ions from secondary resources like industrial waste.

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“…The AuNPs has proved to be the safest option for drug delivery due to its low toxicity [22]. NPs such as dendrimers, quantum dots, polymer gels, and AuNPs are widely used in application such as drug delivery systems and imaging [23]. Zinc oxide is widely used in a number of application such as varistors ultraviolet (UV) lasers, gas sensors, photoprinting, electrochemical nanodevice, sunscreen lotion,…”

Section: Introductionmentioning

confidence: 99%

Comparative Analysis of Metal Nanoparticles Synthesized From Hibiscus Rosa Sinesis and Their Antibacterial Activity Estimation Against Nine Pathogenic Bacteria

Tyagi

Kumar

Tyagi

2017

Asian J Pharm Clin Res

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Objective: This study demonstrates a simple, cost-effective protocol for biosynthesis of stable silver nanoparticles (AgNPs) and gold nanoparticles (AuNPs) from Hibiscus rosa-sinesis and their comparison by applying antibacterial activities against nine pathogenic bacterial species.Methods: AgNPs and AuNPs were biosynthesized from H. rosa-sinesis. The antibacterial activities of biosynthesized AgNPs (bio-AgNPs) and biosynthesized AuNPs (bio-AuNPs) were evaluated against 9 pathogenic bacterial species Pseudomonas aeruginosa, Bacillus subtilis, Micrococcus luteus, Staphylococcus aureus, Staphylococcus epidermidis, Enterobacter aerogenes, Escherichia coli, Streptococcus pneumoniae, Aeromonas hydrophila by the agar disc diffusion method.Results: Biological synthesized AgNP/AuNPs were characterized by an ultraviolet-visible (UV-Vis) spectrophotometer, Fourier transform infrared spectroscopy (FTIR), and transmission electron microscopy (TEM). The existence of silver and gold ions in the extracts was conformed (primary confirmation) through UV-Vis and the maximum plasmon peak was observed at 402 and 530 nm of bio-AgNPs and bio-AuNPs, respectively. Bio-AgNPs were obtained in 13.01-28.14 nm size range, whereas bio-AuNPs were in 6.32-18.19 nm size range after analysis of TEM images. The results of FTIR spectra indicate that the bio-AuNPs were bound to amine groups and bio-AgNPs to carboxylate ion groups. The antibacterial activities of AgNP/AuNP, the zone of inhibition significantly increased with the increases of concentrations of bio-AgNPs in all pathogenic bacterial species except in the case of S. epidermidis at 50%, Streptococcus aerogenes and A. hydrophila at 70%, whereas in the case of bio-AuNPs antibacterial activities were displayed only against B. subtilis at 20% and 100% concentration. Conclusion:This study suggests that AgNPs exhibits outstanding antibacterial activity against pathogenic bacteria as compared to AuNPs synthesized from H. rosa-sinensis leaf extract and insights to their potential applicability as an alternative antibacterial agent in microbial and human health system to reduce the resistance ability of pathogenic bacteria.

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Fungus mediated synthesis of gold nanoparticles and their conjugation with genomic DNA isolated from Escherichia coli and Staphylococcus aureus

Cited by 107 publications

References 41 publications

Gold Nanoparticles: Synthesis and Applications in Drug Delivery

Gold Nanoparticles: Synthesis and Applications in Drug Delivery

Biofabrication of gold nanoparticles by Shewanella species

Comparative Analysis of Metal Nanoparticles Synthesized From Hibiscus Rosa Sinesis and Their Antibacterial Activity Estimation Against Nine Pathogenic Bacteria

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