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Ye Y, He J, Wang H, Li W, Wang Q, Luo C, Tang X, Chen X, Jin X, Yao K, Zhou M. Cell Wall Destruction and Internal Cascade Synergistic Antifungal Strategy for Fungal Keratitis. ACS NANO 2022; 16:18729-18745. [PMID: 36278973 DOI: 10.1021/acsnano.2c07444] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Fungal keratitis is one of the most common blindness-causing diseases, but clinical antifungal treatment remains a challenge. The fungal cell wall and biofilm matrix which severely confine the drug preparation are the critical obstructive factors to therapeutic effects. Herein, we report ethylenediaminetetraacetic acid (EDTA) modified AgCu2O nanoparticles (AgCuE NPs) to disrupt the cell wall and then eradicate C. albicans through the internal cascade synergistic effects of ion-released chemotherapy, chemodynamic therapy, photodynamic therapy, and mild photothermal therapy. AgCuE NPs exhibited excellent antifungal activity both in preventing biofilm formation and in destroying mature biofilms. Furthermore, AgCuE NP based gel formulations were topically applied to kill fungi, reduce inflammation, and promote wound healing, using optical coherence tomography and photoacoustic imaging to monitor nanogel retention and therapeutic effects on the infected murine cornea model. The AgCuE NP gel showed good biosafety and no obvious ophthalmic and systemic side effects. This study suggests that the AgCuE NP gel is an effective and safe antifungal strategy for fungal keratitis with a favorable prognosis and potential for clinical translation.
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Affiliation(s)
- Yang Ye
- Eye Center, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310009, People's Republic of China
- Zhejiang Provincial Key Lab of Ophthalmology, Hangzhou, 310009, People's Republic of China
| | - Jian He
- Eye Center, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310009, People's Republic of China
- Institute of Translational Medicine, Zhejiang University, Hangzhou, 310009, People's Republic of China
| | - Hanle Wang
- Eye Center, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310009, People's Republic of China
- Zhejiang Provincial Key Lab of Ophthalmology, Hangzhou, 310009, People's Republic of China
| | - Wenbo Li
- Eye Center, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310009, People's Republic of China
- Zhejiang Provincial Key Lab of Ophthalmology, Hangzhou, 310009, People's Republic of China
| | - Qingya Wang
- Eye Center, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310009, People's Republic of China
- Institute of Translational Medicine, Zhejiang University, Hangzhou, 310009, People's Republic of China
| | - Chenqi Luo
- Eye Center, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310009, People's Republic of China
- Zhejiang Provincial Key Lab of Ophthalmology, Hangzhou, 310009, People's Republic of China
| | - Xiajing Tang
- Eye Center, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310009, People's Republic of China
- Zhejiang Provincial Key Lab of Ophthalmology, Hangzhou, 310009, People's Republic of China
| | - Xiaoyuan Chen
- Departments of Diagnostic Radiology, Surgery, Chemical and Biomolecular Engineering, and Biomedical Engineering, Yong Loo Lin School of Medicine and College of Design and Engineering, National University of Singapore, Singapore 119074, Singapore
- Clinical Imaging Research Centre, Centre for Translational Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117599, Singapore
- Nanomedicine Translational Research Program, NUS Center for Nanomedicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117597, Singapore
- Institute of Molecular and Cell Biology, Agency for Science, Technology, and Research (A*STAR), 61 Biopolis Drive, Proteos, Singapore 138673, Singapore
| | - Xiuming Jin
- Eye Center, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310009, People's Republic of China
- Zhejiang Provincial Key Lab of Ophthalmology, Hangzhou, 310009, People's Republic of China
| | - Ke Yao
- Eye Center, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310009, People's Republic of China
- Zhejiang Provincial Key Lab of Ophthalmology, Hangzhou, 310009, People's Republic of China
| | - Min Zhou
- Eye Center, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310009, People's Republic of China
- Institute of Translational Medicine, Zhejiang University, Hangzhou, 310009, People's Republic of China
- Research Center for Life Science and Human Health, Binjiang Institute of Zhejiang University, Hangzhou 310053, People's Republic of China
- State Key Laboratory of Modern Optical Instrumentations, Zhejiang University, Hangzhou 310058, People's Republic of China
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Rändler C, Matthes R, McBain AJ, Giese B, Fraunholz M, Sietmann R, Kohlmann T, Hübner NO, Kramer A. A three-phase in-vitro system for studying Pseudomonas aeruginosa adhesion and biofilm formation upon hydrogel contact lenses. BMC Microbiol 2010; 10:282. [PMID: 21062489 PMCID: PMC2997771 DOI: 10.1186/1471-2180-10-282] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2009] [Accepted: 11/09/2010] [Indexed: 11/24/2022] Open
Abstract
Background Pseudomonas aeruginosa is commonly associated with contact lens (CL) -related eye infections, for which bacterial adhesion and biofilm formation upon hydrogel CLs is a specific risk factor. Whilst P. aeruginosa has been widely used as a model organism for initial biofilm formation on CLs, in-vitro models that closely reproduce in-vivo conditions have rarely been presented. Results In the current investigation, a novel in-vitro biofilm model for studying the adherence of P. aeruginosa to hydrogel CLs was established. Nutritional and interfacial conditions similar to those in the eye of a CL wearer were created through the involvement of a solid:liquid and a solid:air interface, shear forces and a complex artificial tear fluid. Bioburdens varied depending on the CL material and biofilm maturation occurred after 72 h incubation. Whilst a range of biofilm morphologies were visualised including dispersed and adherent bacterial cells, aggregates and colonies embedded in extracellular polymer substances (EPS), EPS fibres, mushroom-like formations, and crystalline structures, a compact and heterogeneous biofilm morphology predominated on all CL materials. Conclusions In order to better understand the process of biofilm formation on CLs and to test the efficacy of CL care solutions, representative in-vitro biofilm models are required. Here, we present a three-phase biofilm model that simulates the environment in the eye of a CL wearer and thus generates biofilms which resemble those commonly observed in-situ.
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Affiliation(s)
- Claudia Rändler
- Department of Hygiene and Environmental Medicine, Ernst Moritz Arndt University Greifswald, Greifswald, Germany
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