Antimicrobial photodynamic therapy mediated by methylene blue coupled to β-cyclodextrin reduces early colonizing microorganisms from the oral biofilm
| Autor: | Carolina Steiner-Oliveira, Gabriela de Paula, Mateus Cardoso Oliveira, Marinês Nobre-dos-Santos, Marcelo Fabiano Gomes Boriollo, Luciana Solera Sales, Lidiany Karla Azevedo Rodrigues |
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| Rok vydání: | 2021 |
| Předmět: |
medicine.medical_treatment
030303 biophysics Biophysics Photodynamic therapy Dermatology Microbiology Streptococcus mutans 030207 dermatology & venereal diseases 03 medical and health sciences chemistry.chemical_compound 0302 clinical medicine Anti-Infective Agents Streptococcus mitis medicine Pharmacology (medical) Photosensitizer 0303 health sciences Photosensitizing Agents biology Chemistry beta-Cyclodextrins Biofilm Streptococcus gordonii Antimicrobial biology.organism_classification Methylene Blue Streptococcus oralis Oncology Photochemotherapy Biofilms Methylene blue |
| Zdroj: | Photodiagnosis and photodynamic therapy. 34 |
| ISSN: | 1873-1597 |
| Popis: | Objective To test the effect of antimicrobial photodynamic therapy (A-PDT) on the oral biofilm formed with early colonizing microorganisms, using the photosensitizer methylene blue coupled with β-cyclodextrin nanoparticles and red light sources laser or LED (λ =660 nm). Methods The groups were divided into (n = 3, in triplicate): C (negative control, 0.9 % NaCl), CX (positive control, 0.2 % chlorhexidine), P (Photosensitizer/Nanoparticle), L (Laser), LED (light-emitting diode), LP (Laser + Photosensitizer/Nanoparticle) and LEDP (LED + Photosensitizer/Nanoparticle). A multispecies biofilm composed ofS. gordonii, S. oralis, S. mitis, and S. sanguinis was grown in microplates containing BHI supplemented with 1% sucrose (w/v) for 24 h. Light irradiations were applied with a laser at 9 J for 90 s (320 J/cm2), or with LED, at 8.1 J for 90 s (8.1 J/cm2). The microbial reduction was assessed by counting viable biofilm microorganisms in selective culture media, before and after the treatments. Data normality was assessed by the Shapiro-Wilk test, and the results were submitted to Kruskal-Wallis analysis, followed by Dunn's test, with a significance level of 5%. Results The groups LP and LEDP were able to significantly reduce the biofilm microorganism counts by as much as 4 log10 times compared to the negative control group (p 0.05). Conclusion The A-PDT mediated by encapsulated β-cyclodextrin methylene blue irradiated by Laser or LED was effective in the microbial reduction of multispecies biofilm composed of early colonizing microorganisms. |
| Databáze: | OpenAIRE |
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