Effect of 5-aminolevulinic Acid Photodynamics Therapy on Biofilm of .
10.3881/j.issn.1000-503X.11774
- Author:
Yuzhen LIU
1
;
Rong ZENG
1
;
Zhimin DUAN
1
;
Haoxiang XU
1
;
Qiuju WU
1
;
Qing CHEN
2
;
Tong LIN
3
;
Min LI
1
Author Information
1. Department of Laser Surgery,Institute of Dermatology,CAMS and PUMC,Nanjing 210042,China.
2. Jiangsu Province Blood Center,Nanjing 210042,China.
3. Jiangsu Key Laboratory of Molecular Biology for Skin Diseases & STDs,Institute of Dermatology,CAMS and PUMC,Nanjing 210042,China.
- Publication Type:Journal Article
- Keywords:
5-aminolevulinic acid photodynamics therapy;
Propionibacterium acnes;
biofilm
- MeSH:
Aminolevulinic Acid;
Biofilms;
Photochemotherapy;
Photosensitizing Agents;
Propionibacterium acnes
- From:
Acta Academiae Medicinae Sinicae
2020;42(3):283-288
- CountryChina
- Language:Chinese
-
Abstract:
To investigate the effect of 5-aminolevulinic acid photodynamic therapy (ALA-PDT) on () biofilm. biofilms were constructed on a cell slide and treated with ALA-PDT.According to different light doses,the biofilms were divided into six groups:ALA-PDT group [ALA-PDT1 (50 J/cm),ALA-PDT2 group (100 J/cm),ALA-PDT3 group (200 J/cm)],ALA-only group (ALA group),light-only group (LED),and a negative control group (ALA-PDT-group).The biofilm structure and the ratio of the dead bacteria/live bacteria were observed using a laser confocal microscope (CLSM).Biofilm viability was measured using the XTT assay. CLSM showed that the biofilm structures of ALA group and LED group were not significantly different from that of ALA-PDT-group,whereas the biofilm structure was more seriously damaged in ALA-PDT1 group,ALA-PDT2 group,and ALA-PDT3 group than in the ALA-PDT-group.The ratios of the dead/live bacteria in ALA-PDT-group,ALA group,LED group,ALA-PDT1 group,ALA-PDT2 group,and ALA-PDT3 group were 0.350±0.033, 0.305±0.046, 0.330±0.032, 1.525±0.439, 2.293±0.148 and 3.092±0.189,respectively.ALA group(=0.003, =1.000)and LED group(=-0.025, =1.000)did not significantly differ from the ALA-PDT-group.However,the ratio of dead/live bacteria in ALA-PDT-group was significantly lower than those in ALA-PDT1 group (=-0.162, <0.001),ALA-PDT2 group (=-0.254, <0.001),and ALA-PDT3 group (=-0.352, <0.001).The values of the XTT assay were were 0.462±0.028,0.465±0.044,0.437±0.047,0.301±0.040,0.207±0.001,and 0.110±0.007,respectively,in ALA-PDT-group,ALA group,LED group,ALA-PDT1 group,ALA-PDT2 group,and ALA-PDT3 group.Although the values of XTT assay in ALA(=-0.044, =1.000)and LED groups (=-0.020, =1.000)did not significantly differ from that in ALA-PDT-group,it was significantly higher in ALA-PDT-group than in ALA-PDT1 group (=1.175, <0.001),ALA-PDT2 group (=1.942, <0.001),and ALA-PDT3 group (=-0.352, =2.742, <0.001). ALA-PDT has an inhibitory effect on biofilm.ALA-PDT destroys biofilm structure and inhibits biofilm viability.
