Antibacterial and antibiofilm effects of silver nanoparticles against the uropathogen Escherichia coli U12

Selem, Eman; Mekky, Asmaa F.; Hassanein, Wesam A.; Reda, Fayiz M.; Selim, Yasser

doi:10.1016/j.sjbs.2022.103457

Cited by 18 publications

(7 citation statements)

References 29 publications

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“…5B). Although the concentration of silver( i ) at the centre of the spots and a few micrometres away is 2 orders of magnitude lower than the minimum inhibitory concentration of silver( i ) for E. coli , 63 any cumulative effect of the silver( i ) release is not considered. Thus, the uptake of silver( i ) by the bacteria over time (as compared to the instantaneous concentration referenced above) may have a significant effect, as observed in the experiments.…”

Section: Resultsmentioning

confidence: 99%

Antimicrobial effects of silver nanoparticle-microspots on the mechanical properties of single bacteria

Caniglia,

Valavanis,

Tezcan

et al. 2024

Analyst

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Section: Resultsmentioning

confidence: 99%

Antimicrobial effects of silver nanoparticle-microspots on the mechanical properties of single bacteria

Caniglia,

Valavanis,

Tezcan

et al. 2024

Analyst

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“…Bacterial adherence to surfaces is the first stage of biofilm formation. Adhesion proteins, flagellum, and flagella-mediated motility, which regulate bacteria’s initial attachment to various surfaces, are thus therapeutic targets for NPs to exert antibiofilm action. , Thus, by ion release, several MNPs can diminish bacterial adherence to surfaces, inhibit the enzymatic activity of proteins involved in peptidoglycan synthesis, and slow biofilm formation. , Biofilm generation is similarly inhibited by AgNP-induced ROS production and silver release. These strategies can suppress the expression of genes involved in motility and biofilm formation .…”

Section: The Mechanism Of Mnps In Antimicrobial Activitiesmentioning

confidence: 99%

Metal-Based Nanoparticles as Antimicrobial Agents: A Review

Luo,

Huang,

Zhang

et al. 2024

ACS Appl. Nano Mater.

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Antibiotic abuse has become a rising public health concern in recent years, leading to dangerous bacteria developing antibiotic resistance to most antibiotic medicines currently in use. Traditional antimicrobial medications have been helpful in the early stages of treating numerous forms of serious bacterial infectious diseases; however, despite the significant therapeutic benefit, there are a number of issues with follow-up treatment. Metalbased nanomaterials, which have properties including the difficulty of establishing drug resistance and the advantages of reduced cytotoxicity, have been considered promising antimicrobial substances. This review discusses the most important types of metal-based nanoparticles (MNPs), such as copper, titanium, zinc oxide, etc., with a focus on the antimicrobial applications of gold-and silver-based nanoparticles. Furthermore, the advanced research progress of MNPs as antimicrobial agents and the stimuli-responsive metal nanoparticle antimicrobial strategies working under photothermal, magnetic, and pH stimulation are also summarized in this article. In general, with the advancement of technology, antimicrobial materials based on MNPs will offer excellent prospects for improving drug resistance and antimicrobial applications.

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“…However, Shameli et al [36] observed no superior antibacterial activity at higher Ag loadings on zeolite clay (between 0.020 mg/mL and 0.050 mg/mL) against E. coli, K. pneumoniae, and S. aureus and rather attributed the antimicrobial activity to smaller sized-AgNPs (between 4 nm to 8.53 nm). [50]…”

Section: Synthesis and Characterization Of Nanosilver Clay Compositesmentioning

confidence: 99%

Antifungal Properties of Nanosilver Clay Composites Against Fungal Pathogens of Agaricus bisporus

Ramakutoane,

Roux‐van der Merwe,

Badenhorst

et al. 2023

ChemistrySelect

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This study aimed to determine the possible control of selected pathogenic and competitive fungi of A. bisporus by three nanosilver clay composites and establish the effective concentrations of the composites for inhibiting pathogens. Nanosilver (AgNPs) clay (zeolite, montmorillonite, and palygorskite) composites were synthesized by a microwave‐assisted surface functionalization technique, and various techniques characterized the products. Zeolite and montmorillonite composites showed uniformly distributed spherical AgNPs with an average size of 3.33 nm and 2.85 nm, respectively, whereas palygorskite presented agglomerated and unevenly distributed AgNPs. The influence of the various composites on 9 fungi, including strains of T. aggressivum f. aggressivum, L. fungicola, C. dendroides, and Mycogone sp., was determined in vitro at different concentrations. At 10 mg/mL, AgNP‐zeolite and AgNP‐montmorillonite inhibited 8 out of 9 pathogens, while AgNP‐palygorskite only inhibited 1 pathogen. The nanosilver clay composites tested against A. bisporus revealed no adverse effects on mycelial growth at any concentrations tested. This study confirms that AgNP‐zeolite and AgNP‐montmorillonite composites have effective antifungal properties and can be used as alternative fungicides against mushroom pathogens without affecting A. bisporus growth. However, further investigation is required to unravel the mechanism of selective antifungal activity observed in this study.

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Antibacterial and antibiofilm effects of silver nanoparticles against the uropathogen Escherichia coli U12

Cited by 18 publications

References 29 publications

Antimicrobial effects of silver nanoparticle-microspots on the mechanical properties of single bacteria

Antimicrobial effects of silver nanoparticle-microspots on the mechanical properties of single bacteria

Metal-Based Nanoparticles as Antimicrobial Agents: A Review

Antifungal Properties of Nanosilver Clay Composites Against Fungal Pathogens of Agaricus bisporus

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