期刊
ACS NANO
卷 15, 期 12, 页码 19888-19904出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.1c07397
关键词
chemotherapy; fibroblast; iron oxide; photodynamic therapy; Streptococcus mutans; toluidine-blue ortho
类别
资金
- University of Maryland, Baltimore, Institute for Clinical & Translational Research (ICTR)
- IN-SPIRE Grant Program.University of Maryland School of Dentistry
- Imam Abdulrahman bin Faisal University, Dammam, Saudi Arabia
- Saudi Arabian Cultural Mission
MagTBO, a versatile photosensitizer nanoplatform designed in this study, integrates TBO photosensitizer and SPIONs via a microemulsion method to enhance the efficiency of aPDT in targeting bacterial communities embedded within biofilms. The use of an external magnetic field drives the MagTBO microemulsion to penetrate deep into biofilms, improving the photodynamic disinfection effect and demonstrating a promising strategy for intensifying the antibacterial action of photosensitizers against pathogenic oral biofilms.
Conventional antibiotic therapies for biofilm-trigged oral diseases are becoming less efficient due to the emergence of antibiotic-resistant bacterial strains. Antimicrobial photodynamic therapy (aPDT) is hampered by restricted access to bacterial communities embedded within the dense extracellular matrix of mature biofilms. Herein, a versatile photosensitizer nanoplatform (named MagTBO) was designed to overcome this obstacle by integrating toluidine-blue ortho (TBO) photosensitizer and superparamagnetic iron oxide nanoparticles (SPIONs) via a microemulsion method. In this study, we reported the preparation, characterization, and application of MagTBO for aPDT. In the presence of an external magnetic field, the MagTBO microemulsion can be driven and penetrate deep sites inside the biofilms, resulting in an improved photodynamic disinfection effect compared to using TBO alone. Besides, the obtained MagTBO microemulsions revealed excellent water solubility and stability over time, enhanced the aPDT performance against S. mutans and saliva-derived multispecies biofilms, and improved the TBO's biocompatibility. Such results demonstrate a proof-of-principle for using microemulsion as a delivery vehicle and magnetic field as a navigation approach to intensify the antibacterial action of currently available photosensitizers, leading to efficient modulation of pathogenic oral biofilms.
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