Highly synergistic antimicrobial activity of spherical and flower-like hierarchical titanium dioxide/silver composites

Ye, Junwei; Cheng, Hui‐Ming; Li, Hong; Yang, Yaoyao; Zhang, Siqi; Rauf, Abdul; Zhao, Qi

doi:10.1016/j.jcis.2017.05.111

Cited by 30 publications

(6 citation statements)

References 43 publications

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“…have been documented(Ramezani, Rahmani & Dehestani, 2017;Naz et al, 2017). Few plants extraction and effective bacteriostatic component exhibited synergistic or additive interaction with antibiotics against drug-resistant bacteria(Eskandary, Tahmourespour, Hoodaji & Abdollahi, 2017; Ye et al, 2017). Screening of crude extracts for synergistic or additive interaction with antibiotics is expected to provide bioactive compounds to be used in combinational therapy.…”

Section: Introductionmentioning

confidence: 99%

Antibacterial activity of total flavonoids from Ilex rotunda Thunb. and different antibacterials on different multidrug-resistant bacteria alone or in combination

Chai

Wang

et al. 2018

Preprint

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14The problem of bacterial resistance is becoming more and more serious, which 15 has become an urgent problem to be solved in human and veterinary. One approach to 16 control and delay bacterial resistance is combination therapy in which antibiotics are 17 given together with other antimicrobial or non-antimicrobial agents. Studies have 18 shown that flavonoids from Traditional Chinese medicine (TCM) possess a high level 19 of antibacterial activity against antibiotic resistant strains. The aim of this study was 20 to evaluate the antibacterial effects of a combined therapy of total flavonoids from 21 Ilex rotunda Thunb. and antibiotics against seven kinds of veterinary bacteria which 22 were multidrug resistance bacteria. A microdilution checkerboard method was used to 23 determine the minimal inhibitory concentrations of both types of antimicrobials, alone 24 and in combination. The fractional inhibitory concentration index was calculated and 25 used to classify observed collective antibacterial activity as synergistic, additive, 26 indifferent or antagonistic. 27 From the performed tests, the total flavonoids and antimicrobial agents were 28 combined to inhibit different multidrug-resistant bacteria, such as Escherichia coli, 29 Streptococcus, Pseudomonas aeruginosa, Enterococcus faecalis, Proteus vulgaris, 30 Staphylococcus aureus, Acinetobacter baumannii. For these bacteria, total flavonoids 31 from Ilex Rotunda Thunb. presented synergistic or additive with different antibiotics 32 and had a certain antibacterial effect on the separated multidrug-resistant bacteria. The 33 study shows total flavonoids from Ilex rotunda Thunb. have potential as adjuvants for 34 the treatment of animal bacterial diseases.35

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Section: Introductionmentioning

confidence: 99%

Antibacterial activity of total flavonoids from Ilex rotunda Thunb. and different antibacterials on different multidrug-resistant bacteria alone or in combination

Chai

Wang

et al. 2018

Preprint

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“…The other thing concerning these composites, which should be highlighted, is the possible synergistic effect between two or more antimicrobial agents. This effect was found in Ag-TiO 2 prepared by solvothermal method [40] and at the similar configuration, the greater specific surface area of the material helps the antimicrobial activity as well [41]. Other studies reported the use of photocatalytic activity of TiO 2 for enhancing antimicrobial activity [42], or induction of supportive photothermal effect on AgNPs [43].…”

Section: Introductionmentioning

confidence: 80%

Antimicrobial Synergistic Effect Between Ag and Zn in Ag-ZnO·mSiO2 Silicate Composite with High Specific Surface Area

et al. 2019

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Antimicrobial materials are widely used for inhibition of microorganisms in the environment. It has been established that bacterial growth can be restrained by silver nanoparticles. Combining these with other antimicrobial agents, such as ZnO, may increase the antimicrobial activity and the use of carrier substrate makes the material easier to handle. In the paper, we present an antimicrobial nanocomposite based on silver nanoparticles nucleated in general silicate nanostructure ZnO·mSiO2. First, we prepared the silicate fine net nanostructure ZnO·mSiO2 with zinc content up to 30 wt% by precipitation of sodium water glass in zinc acetate solution. Silver nanoparticles were then formed within the material by photoreduction of AgNO3 on photoactive ZnO. This resulted into an Ag-ZnO·mSiO2 composite with silica gel-like morphology and the specific surface area of 250 m2/g. The composite, alongside with pure AgNO3 and clear ZnO·mSiO2, were successfully tested for antimicrobial activity on both gram-positive and gram-negative bacterial strains and yeast Candida albicans. With respect to the silver content, the minimal inhibition concentration of Ag-ZnO·mSiO2 was worse than AgNO3 only for gram-negative strains. Moreover, we found a positive synergistic antimicrobial effect between Ag and Zn agents. These properties create an efficient and easily applicable antimicrobial material in the form of powder.

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“…Similarly, Ye et al have shown that the flower-like hierarchical TiO 2 /Ag composites with slightly higher activity than spherical ones decompose bacterial cells (both E. coli and Staphylococcus aureus), due to the synergistic effect of the generated ROS and release of Ag ions [118]. On the other hand, the stability of Ag/TiON (on polyester) photocatalyst has been shown in repetitive experiments for bacterial inactivation under indoor light, suggesting that leaching of Ag into the environment does not happened [119].…”

Section: Plasmonic Photocatalysts For Inactivation Of Microorganismsmentioning

confidence: 92%

Plasmonic Photocatalysts for Microbiological Applications

Endo‐Kimura

Kowalska

2020

Catalysts

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Wide-bandgap semiconductors modified with nanostructures of noble metals for photocatalytic activity under vis irradiation due to localized surface plasmon resonance (LSPR), known as plasmonic photocatalysts, have been intensively investigated over the last decade. Most literature reports discuss the properties and activities of plasmonic photocatalysts for the decomposition of organic compounds and solar energy conversion. Although noble metals, especially silver and copper, have been known since ancient times as excellent antimicrobial agents, there are only limited studies on plasmonic photocatalysts for the inactivation of microorganisms (considering vis-excitation). Accordingly, this review has discussed the available literature reports on microbiological applications of plasmonic photocatalysis, including antibacterial, antiviral and antifungal properties, and also a novel study on other microbiological purposes, such as cancer treatment and drug delivery. Although some reports indicate high antimicrobial properties of these photocatalysts and their potential for medical/pharmaceutical applications, there is still a lack of comprehensive studies on the mechanism of their interactions with microbiological samples. Moreover, contradictory data have also been published, and thus more study is necessary for the final conclusions on the key-factor properties and the mechanisms of inactivation of microorganisms and the treatment of cancer cells.

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Highly synergistic antimicrobial activity of spherical and flower-like hierarchical titanium dioxide/silver composites

Cited by 30 publications

References 43 publications

Antibacterial activity of total flavonoids from Ilex rotunda Thunb. and different antibacterials on different multidrug-resistant bacteria alone or in combination

Antibacterial activity of total flavonoids from Ilex rotunda Thunb. and different antibacterials on different multidrug-resistant bacteria alone or in combination

Antimicrobial Synergistic Effect Between Ag and Zn in Ag-ZnO·mSiO2 Silicate Composite with High Specific Surface Area

Plasmonic Photocatalysts for Microbiological Applications

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