Photodynamic Inactivation of Endopathogenic Microbiota Using Curcumin- mediated Antimicrobial Photodynamic Therapy

Document Type : Final File

Authors
M. Khoobi 1
Sh. Farkhonde Masoule 2
M. Pourhajibagher 3
J. Safari 2
1 Pharmaceutical Sciences Research Center, The Institute of Pharmaceutical Sciences (TIPS), Tehran University of Medical Sciences, Tehran 1417614411, Islamic Republic of Iran
2 Laboratory of Organic Compound Research, Department of Organic Chemistry, College of Chemistry, University of Kashan, P.O. Box 87317-51167, Kashan, Islamic Republic of Iran
3 Dental Research Center, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Islamic Republic of Iran
10.22059/jsciences.2018.67435
Abstract
Root canal disinfection is one of the main factors governing success of endodontic therapy. Antimicrobial photodynamic therapy (aPDT) is presented as a promising antimicrobial therapy that can eliminate microbiota present in infected root canal systems. In this study, a series of experiments investigated the effects of aPDT on cell viability and biofilm degradation ability of endopathogenic microbiota. Enterococcus faecalis and Pseudomonas aeruginosa strains as the versatile pathogenic microbiota in endodontic infections were used as the tested strains. Curcumin (CUR) and light-emitting diode (LED) were used as the photosensitizer and light source, respectively. The antimicrobial and anti-biofilm effects of CUR-aPDT were assessed by colony forming unit (CFU), and crystal violet assays. CUR-aPDT significantly decreased the CFU/mL count of E. faecalis and P. aeruginosa compared to the control group (P<0.05). The killing percentage of aPDT was achieved 95.0% for E. faecalis and 81.1% for P. aeruginosa. In addition, the biofilm degradation ability of E. faecalis and P. aeruginosa significantly decreased to 41.2% and 30.2%, respectively (P<0.05). According to the results, neither CUR nor LED showed the antimicrobial and anti-biofilm effects when used alone. In conclusion, the results of this study indicated that CUR-aPDT has an appreciable effect on endopathogenic microbiota upon photoactivation.
Keywords
Antimicrobial photodynamic therapy
Biofilm degradation
Curcumin, Enterococcus faecalis
Pseudomonas aeruginosa
Subjects
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Journal of Sciences, Islamic Republic of Iran
Volume 29, Issue 3
Summer 2018
Pages 205-209