Antimicrobial properties and applications of metal nanoparticles biosynthesized by green methods

Maťátková, Olga; Michailidu, Jana; Miškovská, Anna; Irena, Kolouchová; Masák, Jan; Čejková, Alena

doi:10.1016/j.biotechadv.2022.107905

Cited by 89 publications

(52 citation statements)

References 269 publications

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“…These values are generally compared with those mentioned in local microbiology guidelines and/or the “antibiotic and antifungal disc interpretative criteria and quality control table” proposed by EUCAST and CLSI [ 368 , 379 , 417 , 418 ]. The susceptibility of microorganisms to MNPs improves with decreasing MICs (or increasing diameters of inhibition) [ 419 ].…”

Section: Methods For Testing Antibacterial and Antifungal Activities ...mentioning

confidence: 99%

A Critical Review of the Antimicrobial and Antibiofilm Activities of Green-Synthesized Plant-Based Metallic Nanoparticles

et al. 2022

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Metallic nanoparticles (MNPs) produced by green synthesis using plant extracts have attracted huge interest in the scientific community due to their excellent antibacterial, antifungal and antibiofilm activities. To evaluate these pharmacological properties, several methods or protocols have been successfully developed and implemented. Although these protocols were mostly inspired by the guidelines from national and international regulatory bodies, they suffer from a glaring absence of standardization of the experimental conditions. This situation leads to a lack of reproducibility and comparability of data from different study settings. To minimize these problems, guidelines for the antimicrobial and antibiofilm evaluation of MNPs should be developed by specialists in the field. Being aware of the immensity of the workload and the efforts required to achieve this, we set out to undertake a meticulous literature review of different experimental protocols and laboratory conditions used for the antimicrobial and antibiofilm evaluation of MNPs that could be used as a basis for future guidelines. This review also brings together all the discrepancies resulting from the different experimental designs and emphasizes their impact on the biological activities as well as their interpretation. Finally, the paper proposes a general overview that requires extensive experimental investigations to set the stage for the future development of effective antimicrobial MNPs using green synthesis.

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Section: Methods For Testing Antibacterial and Antifungal Activities ...mentioning

confidence: 99%

A Critical Review of the Antimicrobial and Antibiofilm Activities of Green-Synthesized Plant-Based Metallic Nanoparticles

et al. 2022

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“…glabrata ), making them attractive to several fields, such as biomedicine, textile industry, food packaging or cosmetics [ 34 , 35 ]. The antimicrobial effects of nanoparticles are influenced by their physicochemical properties, such as their size, shape, specific surface area, surface energy, charge, zeta potential, surface morphology, crystal structure or ligands [ 12 ]. Therefore, we have decided to study the antifungal activity of two different biosynthesized AgNPs dispersions–small monodisperse AgNPs (mAgNPs) and larger polydisperse AgNPs (pAgNPs), both prepared using Vitis vinifera cane extract.…”

Section: Resultsmentioning

confidence: 99%

“…It has already been found that the physicochemical properties of NPs significantly affect their antimicrobial activity [ 9 , 12 ]. This is particularly interesting in connection with AgNPs, which are known for their antimicrobial effects.…”

Section: Introductionmentioning

confidence: 99%

“…[ 14 – 17 ]. The attractiveness of biogenic NPs lies in their functionalization, capping and stabilization by biomolecules, which themselves might possess antimicrobial properties and also allow NPs to bind to the cell surface [ 12 ]. Since the extracts are prepared exclusively from non-toxic plants and often have beneficial effects on their own, the use of a combination of two active substances (NPs and plant extract) is an interesting approach.…”

Section: Introductionmentioning

confidence: 99%

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Antibiofilm activity of silver nanoparticles biosynthesized using viticultural waste

et al. 2022

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Green methods have become vital for sustainable development of the scientific and commercial sphere; however, they can bring new challenges, including the need for detailed characterization and elucidation of efficacy of their products. In this study, green method of silver nanoparticles (AgNPs) production was employed using an extract from grapevine canes. The aim of the study was to contribute to the knowledge about biosynthesized AgNPs by focusing on elucidation of their antifungal efficiency based on their size and/or hypothesized synergy with bioactive substances from Vitis vinifera cane extract. The antifungal activity of AgNPs capped and stabilized with bioactive compounds was tested against the opportunistic pathogenic yeast Candida albicans. Two dispersions of nanoparticles with different morphology (characterized by SEM-in-STEM, DLS, UV-Vis, XRD, and AAS) were prepared by modification of reaction conditions suitable for economical production and their long-term stability monitored for six months was confirmed. The aims of the study included the comparison of the antifungal effect against suspension cells and biofilm of small monodisperse AgNPs with narrow size distribution and large polydisperse AgNPs. The hypothesis of synergistic interaction of biologically active molecules from V. vinifera extracts and AgNPs against both cell forms were tested. The interactions of all AgNPs dispersions with the cell surface and changes in cell morphology were imaged using SEM. All variants of AgNPs dispersions were found to be active against suspension and biofilm cells of C. albicans; nevertheless, surprisingly, larger polydisperse AgNPs were found to be more effective. Synergistic action of nanoparticles with biologically active extract compounds was proven for biofilm cells (MBIC80 20 mg/L of polydisperse AgNPs in extract), while isolated nanoparticles suspended in water were more active against suspension cells (MIC 20 mg/L of polydisperse AgNPs dispersed in water). Our results bring new insight into the economical production of AgNPs with defined characteristics, which were proven to target a specific mode of growth of significant pathogen C. albicans.

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“…A deeper analysis of the extract composition must be conducted for each plant species used [ 7 , 8 , 9 ]. Once the nanomaterial was obtained via green synthesis, it was proved that these kinds of NMs can be applied in diverse areas as antimicrobial agents or even as photocatalysts for wastewater treatment [ 10 , 11 , 12 , 13 , 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

Green Synthesis via Eucalyptus globulus L. Extract of Ag-TiO2 Catalyst: Antimicrobial Activity Evaluation toward Water Disinfection Process

et al. 2022

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The problem of water pollution by persistent substances and microorganisms requires solutions that materials such as silver-modified titanium dioxide can provide due to their excellent photocatalytic and antimicrobial properties. However, the synthesis methods conventionally used to obtain these materials involve toxic chemical reagents such as sodium borohydride (NaBH4). The search for alternative synthesis methods that use environmentally friendly substances, such as the biosynthesis method, was evaluated. Silver-titanium dioxide (Ag-TiO2) was synthesized by a Eucalyptus globulus L. extract as a reductive agent through sol-gel and microwave-assisted sol-gel processes. Four different solvents were tested to extract secondary metabolites to determine their roles in reducing silver nanoparticles. Titanium dioxide nanoparticles with sizes from 11 to 14 nm were obtained in the anatase phase, and no narrowing of the bandgap was observed (3.1–3.2 eV) for the Ag-TiO2 materials compared with the pure TiO2. Interestingly, the bacterial inhibition values were close to 100%, suggesting an effective antimicrobial mechanism related to the properties of silver. Finally, by the physicochemical characterization of the materials and their antimicrobial properties, it was possible to obtain a suitable biosynthesized Ag-TiO2 material as a green option for water disinfection that may be compared to the conventional methods.

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Antimicrobial properties and applications of metal nanoparticles biosynthesized by green methods

Cited by 89 publications

References 269 publications

A Critical Review of the Antimicrobial and Antibiofilm Activities of Green-Synthesized Plant-Based Metallic Nanoparticles

A Critical Review of the Antimicrobial and Antibiofilm Activities of Green-Synthesized Plant-Based Metallic Nanoparticles

Antibiofilm activity of silver nanoparticles biosynthesized using viticultural waste

Green Synthesis via Eucalyptus globulus L. Extract of Ag-TiO2 Catalyst: Antimicrobial Activity Evaluation toward Water Disinfection Process

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