Preparation and bactericide activity of gallic acid stabilized gold nanoparticles

Moreno-Álvarez, Selene Arizbé; Martínez-Castañón, Gabriel Alejandro; Niño-Martínez, Nereyda; Reyes-Macías, J.F.; Patiño-Marín, Nuria; Loyola-Rodríguez, Juan Pablo; Ruíz, Facundo

doi:10.1007/s11051-010-0060-x

Cited by 57 publications

(51 citation statements)

References 21 publications

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“…This confirms that AuNP was conjugated with GA because the redshift can occur when the particle size increases. Our results agree with a previous study of Moreno-Alvarez et al, 29 which showed that the UV-Vis absorption spectrum of GA-stabilized AuNP shifted to a broader band.…”

Section: Preparation Of Aunp-gasupporting

confidence: 94%

“…These results indicated that the antibacterial activity of GA could be improved by conjugation with AuNP, which is in close agreement with a previous study. 29 Bactericidal mechanism of auNP-ga SEM images show that the bacterial membrane became wrinkled after adding 110 mM GA to P. shigelloides ( Figure 4A) and 50 mM GA to S. flexneri B ( Figure 4B) for 1 hour and 2 hours, respectively. There are several studies that reported that phenolic compounds can penetrate a cell due to alterations in cell membrane permeability.…”

Section: Characterization Of Aunp-gamentioning

confidence: 99%

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Gallic acid conjugated with gold nanoparticles: antibacterial activity and mechanism of action on foodborne pathogens

Rattanata¹,

Klaynongsruang²,

Leelayuwat

et al. 2016

IJN

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Foodborne pathogens, including Plesiomonas shigelloides and Shigella flexneri B, are the major cause of diarrheal endemics worldwide. Antibiotic drug resistance is increasing. Therefore, bioactive compounds with antibacterial activity, such as gallic acid (GA), are needed. Gold nanoparticles (AuNPs) are used as drug delivery agents. This study aimed to conjugate and characterize AuNP–GA and to evaluate the antibacterial activity. AuNP was conjugated with GA, and the core–shell structures were characterized by small-angle X-ray scattering and transmission electron microscopy. Antibacterial activity of AuNP–GA against P. shigelloides and S. flexneri B was evaluated by well diffusion method. AuNP–GA bactericidal mechanism was elucidated by Fourier transform infrared microspectroscopic analysis. The results of small-angle X-ray scattering showed that AuNP–GA conjugation was successful. Antibacterial activity of GA against both bacteria was improved by conjugation with AuNP because the minimum inhibitory concentration value of AuNP–GA was significantly decreased ( P <0.0001) compared to that of GA. Fourier transform infrared analysis revealed that AuNP–GA resulted in alterations of lipids, proteins, and nucleic acids at the bacterial cell membrane. Our findings show that AuNP–GA has potential for further application in biomedical sciences.

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Section: Preparation Of Aunp-gasupporting

confidence: 94%

Section: Characterization Of Aunp-gamentioning

confidence: 99%

Gallic acid conjugated with gold nanoparticles: antibacterial activity and mechanism of action on foodborne pathogens

Rattanata¹,

Klaynongsruang²,

Leelayuwat

et al. 2016

IJN

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show abstract

“…Our attention was next focused on the synthesis of catechol derivatives characterized by a potential biological activity. Since acidic catechols shows antibacterial, 34 antimicrobial 35 and antioxidant 36 activities, we first evaluated the oxidation of two phenolic acid derivatives, 3-(4-hydroxyphenyl)propionic acid 12 and 4-hydroxyphenylacetic acid 13. Irrespective to experimental conditions used, the catechols 12a and 13a were obtained in high yield as the only recovered products, confirming the generality of the procedure (Scheme 3, Table 6, entries 8, 9, 11 and 12).…”

Section: Oxidation Of Phenolsmentioning

confidence: 99%

Layer-by-Layer coated tyrosinase: An efficient and selective synthesis of catechols

Guazzaroni

Crestini

Saladino

2012

Bioorganic & Medicinal Chemistry

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a b s t r a c tAgaricus bisporous tyrosinase was immobilized on commercial available epoxy-resin Eupergit Ò C250L and then coated by the Layer-by-Layer method (LbL). The two novel heterogeneous biocatalysts were characterized for their morphology, pH and storage stability, kinetic properties (K m , V max , V max /K m ) and reusability. These biocatalysts were used for the efficient and selective synthesis of bioactive catechols under mild and environmental friendly experimental conditions. Ascorbic acid was added in the reaction medium to inhibit the formation of ortho-quinones, thus avoiding the known enzyme suicide inactivation process. Catechols were obtained mostly in quantitative yields and conversion of substrate. Tyrosinase immobilized on Eupergit Ò C250L and coated by the LbL method showed better catalytic activities, higher pH and storage stability, and reusability with respect to immobilized uncoated tyrosinase. Since chemical procedures to synthesize catechols are often expensive and with high environmental impact, the use of immobilized tyrosinase represents an efficient alternative for the preparation of this family of bioactive compounds.

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“…Among new research lines, the synthesis of metallic nanoparticles is one of the more promissory ones, for the wide application field such as in cloths, detergents, cosmetics, pharmaceutical products and coatings [13][14][15]. Nanoparticles (NPs) are characterized for having properties depending on their size and shape that are depending on the synthesis methods and conditions [16].…”

Section: Introductionmentioning

confidence: 99%

Biosynthesized silver nanoparticles to control fungal infections in indoor environments

Deyá

Bellotti

2017

Adv. Nat. Sci: Nanosci. Nanotechnol.

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Fungi grow especially in dark and moist areas, deteriorating the indoor environment and causing infections that particularly affect immunosuppressed individuals. Antimicrobial coatings have as principal objective to prevent biofilm formation and infections by incorporation of bioactive additives. In this sense, metallic nanoparticles, such as silver, have proven to be active against different microorganisms specially bacteria. Biosynthesized method is a promising environmentally friendly option to obtain nanoparticles. The aim of this research was assess the employment of plants extracts of Aloysia triphylla (cedrón), Laurelia sempervirens (laurel) and Ruta chalepensis (ruda) to obtain silver nanoparticles to be used as an antimicrobial additive to a waterborne coating formulation. The products obtained were assessed against fungal isolates from biodeteriorated indoor coatings. The fungi were identified by conventional and molecular techniques as Chaetomium globosum and Alternaria alternate. The results revealed that the coating with silver nanoparticles obtained with L. sempervirens extract at 60 °C with a size of 9.8 nm was the most efficient against fungal biofilm development.

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Preparation and bactericide activity of gallic acid stabilized gold nanoparticles

Cited by 57 publications

References 21 publications

Gallic acid conjugated with gold nanoparticles: antibacterial activity and mechanism of action on foodborne pathogens

Gallic acid conjugated with gold nanoparticles: antibacterial activity and mechanism of action on foodborne pathogens

Layer-by-Layer coated tyrosinase: An efficient and selective synthesis of catechols

Biosynthesized silver nanoparticles to control fungal infections in indoor environments

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