Synergistic dual Ag/Cu ion implantation to enhance antimicrobial defense on boston keratoprosthesis
Autor/a
Data de publicació
2025ISSN
1226-4601
Resum
The Boston keratoprosthesis (BKPro) is a critical device for vision restoration in complex cases of corneal blindness, although its long-term retention is challenged by infection risks. This study aims to enhance the antimicrobial properties of the titanium (Ti) backplate of the BKPro by ion implanting silver and copper ions to achieve effective infection control while maintaining cytocompatibility. Research on antimicrobial modifications for BKPro is limited, and while metallic ions like Ag and Cu show promise for biomaterial improvement, their effects on human corneal keratocytes (HCKs) require further study. Ag and Cu were implanted onto rough Ti surfaces, as mono- and coimplantations. Cytotoxicity was assessed in HCKs, and antimicrobial efficacy was tested against Pseudomonas aeruginosa and Candida albicans. After 21 d, monoimplanted Ag samples released 300.4 ppb of Ag+, coimplanted samples released 427.5 ppb of Ag+ and 272.3 ppb of Cu ions, and monoimplanted Cu samples released 567.0 ppb of Cu ions. All ion-implanted surfaces supported HCK proliferation, exhibited no cytotoxicity, and showed strong antimicrobial activity. Ag-implanted surfaces provided antibacterial effects through membrane disruption and reactive oxygen species generation, while Cu-implanted surfaces exhibited antifungal effects via impaired enzymatic functions and reactive oxygen species. Coimplanted AgCu surfaces demonstrated synergistic antimicrobial effects, resulting from the synergy between the bactericidal actions of Ag and the oxidative stress contributions of Cu. Additionally, ion-implanted surfaces enhanced HCK adhesion under co-culture conditions. In conclusion, ion implantation effectively imparts antimicrobial properties to the Ti backplate of BKPro, reducing infection risks while preserving compatibility with corneal cells.
Tipus de document
Article
Versió del document
Versió publicada
Llengua
Anglès
Matèries (CDU)
61 - Medicina
Paraules clau
Pàgines
16
Publicat per
American Association for the Advancement of Science
Col·lecció
29
Publicat a
Biomaterials Research
Citació
Gómez, Silvia G.; Boix-Lemonche, Gerard; Orrit-Prat, Jordi [et al.]. Synergistic dual Ag/Cu ion implantation to enhance antimicrobial defense on boston keratoprosthesis. Biomaterials Research, 2025, 29, 0147. Disponible en: <https://spj.science.org/doi/10.34133/bmr.0147>. Fecha de acceso: 4 abr. 2025. DOI: 10.34133/bmr.0147
Nota
The authors thank the Spanish State Research Agency for financial support (project PID 2021-125150OB-I00 and project PDC2022-133628-C21). They also thank the Generalitat de Catalunya (FI-AGAUR grant 2023 FI-3 00210 to S.G.G.). M.P.G. acknowledges the ICREA Academia award from the Generalitat de Catalunya. This work has been partially funded by the Ministry of Science and Innovation of Spain (project EQUIDENTAL (CPP2022-009563)). This work is part of the Maria de Maeztu Units of Excellence Programme (CEX2023-001300-M/ funded by MCIN/AEI/ 0.13039/501100011033).
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Drets
© 2025 Silvia G. Gómez et al. Exclusive licensee Korean Society for Biomaterials, Republicof Korea. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution License (CC BY 4.0).
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