Oxidative stress responses in biofilms

da Cruz Nizer, Waleska Stephanie; Adams, Madison Elisabeth; Allison, Kira Noelle; Montgomery, Megan Catherine; Mosher, Hailey; Cassol, Edana; Overhage, Joerg

doi:10.1016/j.bioflm.2024.100203

Biofilm

2024

DOI: 10.1016/j.bioflm.2024.100203

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Oxidative stress responses in biofilms

Waleska Stephanie da Cruz Nizer,

Madison Elisabeth Adams,

Kira Noelle Allison

et al.

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2024

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Cited by 6 publications

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Antibacterial performance of Co–Zn ferrite nanoparticles under visible light irradiation

Gubieda,

Abad‐Díaz‐de‐Cerio,

García‐Prieto

et al. 2024

J of Chemical Tech & Biotech

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BACKGROUNDTo address water scarcity and promote sustainable resource management, more efficient and cost‐effective water treatment solutions are necessary. Particularly, pathogens in drinking water are a topic of growing concern. One promising technology is the use of photocatalytic nanoparticles activated by visible light as antibacterial agents. This study focuses on the characterization and antibacterial properties of Co–Zn ferrite nanocatalysts, tested against Escherichia coli.RESULTSThe CoxZn1−xFe2O4 (x = 0, 0.1, 0.4 and 0.6) ferrites were synthesized by the co‐precipitation method. Structural, morphological and optical analyses confirmed that these nanoparticles have a cubic spinel structure, with sizes of around 10 nm, and band gap energies suitable for visible light activation (1.4–1.7 eV). The antibacterial efficacy of the nanoparticles against E. coli was tested and compared with their photocatalytic performance employing phenol as organic pollutant model (highest phenol degradation for x = 0.6). Specifically, the antibacterial capacity of these nanoparticles was evaluated by comparing the ability of bacteria to grow after being incubated with the nanoparticles under visible light and in the dark. It was found that nanoparticles with lower cobalt content (x = 0 and 0.1) significantly reduced bacterial culturability under visible light. Transmission Electron Microscopy analysis revealed that nanoparticles with cobalt content caused bacteria to secrete biofilm, potentially offering some protection against the nanoparticles.CONCLUSIONZnFe2O4 nanoparticles show the highest antibacterial effect amongst those tested. This is attributed to the combined action of Zn2+ ion release and the photocatalytic effect under visible light. Furthermore, Zn might inhibit protective biofilm secretion, leading to higher antibacterial effects. © 2024 The Author(s). Journal of Chemical Technology and Biotechnology published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry (SCI).

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Antibacterial performance of Co–Zn ferrite nanoparticles under visible light irradiation

Gubieda,

Abad‐Díaz‐de‐Cerio,

García‐Prieto

et al. 2024

J of Chemical Tech & Biotech

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Nanoparticles in the battle against Candida auris biofilms: current advances and future prospects

Fayed

2024

Drug Deliv. and Transl. Res.

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Candida auris has emerged as a significant global health threat due to its multidrug resistance and ability to form robust biofilms, particularly on medical devices and hospital surfaces. Biofilms protect C. auris from antifungal treatments and the host immune response, making infections persistent and difficult to control. This review explores the potential of nanoparticles to overcome the limitations of traditional antifungal therapies in combating C. auris biofilms. Nanoparticles, with their unique physicochemical properties, offer promising strategies to penetrate biofilm matrices, deliver antifungal agents, and disrupt biofilm structure. Various types of nanoparticles, including metallic, polymeric, lipid-based, and cyclodextrin-based, demonstrate enhanced biofilm penetration and antifungal activity. Their ability to generate reactive oxygen species, disrupt cell adhesion, and release antifungals in a controlled manner makes them ideal candidates for biofilm-targeted therapies. This review presents the current advancements in nanoparticle-based solutions, emphasizing the need for further research into their mechanisms of action, safety, and clinical application. By addressing the challenge of C. auris biofilms specifically, this review provides a critical synthesis of existing knowledge and identifies future directions for developing effective antifungal therapies using nanotechnology. Graphical abstract

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Acidic biofilm microenvironment-responsive ROS generation via a protein nanoassembly with hypoxia-relieving and GSH-depleting capabilities for efficient elimination of biofilm bacteria

Li,

Sun,

Tang

et al. 2024

Acta Biomaterialia

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Oxidative stress responses in biofilms

Cited by 6 publications

References 161 publications

Antibacterial performance of Co–Zn ferrite nanoparticles under visible light irradiation

Antibacterial performance of Co–Zn ferrite nanoparticles under visible light irradiation

Nanoparticles in the battle against Candida auris biofilms: current advances and future prospects

Acidic biofilm microenvironment-responsive ROS generation via a protein nanoassembly with hypoxia-relieving and GSH-depleting capabilities for efficient elimination of biofilm bacteria

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