Phyto-assisted synthesis of zinc oxide nanoparticles for developing antibiofilm surface coatings on central venous catheters

Frontiers in Chemistry

Chemistry

Mispaur Rahaman¹  Suchitra Rajput Chauhan²  Ritika Tripathi²  Manika Khanuja³  Ashwini Chauhan⁴  Akshit Malhotra⁵ 

[1] Central Instrumentation Centre, Tripura University, Suryamaninagar, Tripura, India;Centre for Advanced Materials and Devices (CAMD), School of Engineering and Technology, BML Munjal University, Gurgaon, Haryana, India;Centre for Nanoscience and Nanotechnology, Jamia Millia Islamia, New Delhi, India;Department of Microbiology, Tripura University, Suryamaninagar, Tripura, India;Department of Microbiology, Tripura University, Suryamaninagar, Tripura, India;Invisiobiome, New Delhi, India;

关键词: green synthesis;    plant mediated synthesis;    zinc oxide nanoparticles (ZnO NPs);    nanoparticle coatings;    anti-biofilm coatings;    device associated infections;    anti-microbial resistance;    medical devices;   

DOI  :  10.3389/fchem.2023.1138333

 received in 2023-01-05, accepted in 2023-03-02,  发布年份 2023

来源: Frontiers

【 摘 要 】

Medical devices such as Central Venous Catheters (CVCs), are routinely used in intensive and critical care settings. In the present scenario, incidences of Catheter-Related Blood Stream Infections (CRBSIs) pose a serious challenge. Despite considerable advancements in the antimicrobial therapy and material design of CVCs, clinicians continue to struggle with infection-related complications. These complications are often due colonization of bacteria on the surface of the medical devices, termed as biofilms, leading to infections. Biofilm formation is recognized as a critical virulence trait rendering infections chronic and difficult to treat even with 1,000x, the minimum inhibitory concentration (MIC) of antibiotics. Therefore, non-antibiotic-based solutions that prevent bacterial adhesion on medical devices are warranted. In our study, we report a novel and simple method to synthesize zinc oxide (ZnO) nanoparticles using ethanolic plant extracts of Eupatorium odoratum. We investigated its physio-chemical characteristics using Field Emission- Scanning Electron Microscopy and Energy dispersive X-Ray analysis, X-Ray Diffraction (XRD), Photoluminescence Spectroscopy, UV-Visible and Diffuse Reflectance spectroscopy, and Dynamic Light Scattering characterization methods. Hexagonal phase with wurtzite structure was confirmed using XRD with particle size of ∼50 nm. ZnO nanoparticles showed a band gap 3.25 eV. Photoluminescence spectra showed prominent peak corresponding to defects formed in the synthesized ZnO nanoparticles. Clinically relevant bacterial strains, viz., Proteus aeruginosa PAO1, Escherichia coli MTCC 119 and Staphylococcus aureus MTCC 7443 were treated with different concentrations of ZnO NPs. A concentration dependent increase in killing efficacy was observed with 99.99% killing at 500 μg/mL. Further, we coated the commercial CVCs using green synthesized ZnO NPs and evaluated it is in vitro antibiofilm efficacy using previously optimized in situ continuous flow model. The hydrophilic functionalized interface of CVC prevents biofilm formation by P. aeruginosa, E. coli and S. aureus. Based on our findings, we propose ZnO nanoparticles as a promising non-antibiotic-based preventive solutions to reduce the risk of central venous catheter-associated infections.

【 授权许可】

Unknown   
Copyright © 2023 Malhotra, Chauhan, Rahaman, Tripathi, Khanuja and Chauhan.