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Volume 20, Issue 1
  • ISSN: 2772-4344
  • E-ISSN: 2772-4352

Abstract

Background

The aim of this study was to investigate the antimicrobial photodynamic, sonodynamic, and combined photodynamic and sonodynamic potentials of IR780 iodide loaded mesoporous silica nanoparticles against gram-negative () and multi drug resistant MDR ).

Methods

IR780 iodide loaded mesoporous silica nanoparticles were synthesized, and their antimicrobial photodynamic and sonodynamic potentials against one strain, and one MDR strain were investigated. Laser irradiation was achieved a 785 nm diode laser (500 mW/cm2, 5 min). Ultrasound irradiation was achieved a 1-MHz ultrasound unit (1.5 W/cm2, 50% duty cycle, 3 min). Viable bacterial cells were counted by serial dilution method. Data were analyzed by ANOVA followed by Tukey's test ( ≤ 0.05).

Results

The results revealed that for , the combined photodynamic therapy (PDT) and sonodynamic therapy (SDT) showed a 44% reduction in bacterial cell viability as compared to 18% and 31% when exposed to SDT alone and PDT alone, respectively. For MDR. the combined treatment resulted in a 45% reduction in bacterial cell viability, as compared to 14% and 30% when exposed to SDT alone and PDT alone, respectively. The killing effect was mainly due to the photodynamic and sonodynamic effects of the nanoparticles, mainly caused by singlet oxygen. No photothermal effect was involved in the killing.

Conclusion

The results of this study demonstrated that IR780 iodide-loaded mesoporous silica nanoparticles have the potential to be utilized as photo/sono therapeutic agents for the inactivation of drug-resistant bacteria.

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An In vitro Study on the Antibacterial Effect of a Combined Photodynamic and Sonodynamic Therapy Using IR780 Iodide-loaded Mesoporous Silica Nanoparticles Against P. aeruginosa and Multi-Drug Resistant P. aeruginosa
Recent Adv Antiinfect Drug Discov 20, 64 (2025); https://doi.org/10.2174/0127724344309438240529064221
/content/journals/raaidd/10.2174/0127724344309438240529064221
/content/journals/raaidd/10.2174/0127724344309438240529064221
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  • Article Type:     Research Article
Keyword(s): antimicrobial resistance; IR780 iodide; MDR Pseudomonas aeruginosa; mesoporous silica nanoparticles; photodynamic therapy; Pseudomonas aeruginosa; sonodynamic therapy

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