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Effect of antimicrobial photodynamic therapy with Chlorella and Curcuma extract on Streptococcus mutans biofilms

Authors
 Hye-Rim Hwang  ;  Eun-Song Lee  ;  Si-Mook Kang  ;  Ki-Ho Chung  ;  Baek-Il Kim 
Citation
 PHOTODIAGNOSIS AND PHOTODYNAMIC THERAPY, Vol.35 : 102411, 2021-07 
Journal Title
PHOTODIAGNOSIS AND PHOTODYNAMIC THERAPY
ISSN
 1572-1000 
Issue Date
2021-07
Keywords
Antibacterial photodynamic therapy ; Biofilm ; Dental caries ; Natural photosensitizer ; Streptococcus mutans
Abstract
Background: Antimicrobial photodynamic therapy (aPDT) using natural photosensitive agents is an effective method for preventing oral diseases of bacterial origin. The purpose of this study was to evaluate the antimicrobial effect of aPDT, using powdered extracts of Chlorella and Curcuma, on the biofilms of Streptococcus mutans (S. mutans), a bacterium that is known to cause dental caries.

Methods: Commercially available powdered Chlorella and Curcuma extracts were used as photosensitizers. S. mutans, cultured for 2 days, was inoculated (0.1 ml; 1 × 109 CFU/ml) on the surface of a hydroxyapatite (HA) disc and incubated for 24 h to allow the formation of a biofilm. The HA disc with the S. mutans biofilm was immersed in either Curcuma extract (0.5 mg/ml), Chlorella extract, distilled water (negative control), or Listerine (positive control) for 1 min and then irradiated with an LED (Qraycam; wavelength, 405 nm; energy, 59 mW) for 5 min.

Results: The application of aPDT with Curcuma or Chlorella extract to S. mutans 24-hour biofilms significantly decreased the number of viable cells and the live/dead cell ratio when compared with those in the negative control (distilled water; p < 0.05).

Conclusions: aPDT using 405 nm light and Chlorella or Curcuma as a photosensitizer has significant antimicrobial effects against S. mutans biofilms. Thus, employing aPDT with natural plant extracts as photosensitizers could be an effective strategy for preventing dental caries but needs to be evaluated in properly controlled clinical trials..
Full Text
https://www.sciencedirect.com/science/article/pii/S1572100021002386
DOI
10.1016/j.pdpdt.2021.102411
Appears in Collections:
2. College of Dentistry (치과대학) > Dept. of Preventive Dentistry and Public Oral Health (예방치과학교실) > 1. Journal Papers
2. College of Dentistry (치과대학) > Others (기타) > 1. Journal Papers
Yonsei Authors
Kang, Si-Mook(강시묵) ORCID logo https://orcid.org/0000-0003-2341-3636
Kim, Baek Il(김백일) ORCID logo https://orcid.org/0000-0001-8234-2327
Lee, Eun Song(이은송) ORCID logo https://orcid.org/0000-0002-2949-4783
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/184478
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