[논문]Photoinactivation of single and mixed biofilms of Candida albicans and non-albicans Candida species using Photodithazine®

Carmello, J.C.; Alves, F.; Mima, E.G.d.O.; Jorge, J.H.; Bagnato, V.S.; Pavarina, A.C.

doi:10.1016/j.pdpdt.2016.11.013

[해외논문] Photoinactivation of single and mixed biofilms of Candida albicans and non-albicans Candida species using Photodithazine® 원문보기

Photodiagnosis and photodynamic therapy, v.17, 2017년, pp.194 - 199

Carmello, J.C. , Alves, F. , Mima, E.G.d.O. , Jorge, J.H. , Bagnato, V.S. , Pavarina, A.C.

Abstract ▼ AI-Helper

This study evaluated the effectiveness of antimicrobial photodynamic therapy (aPDT) mediated by Photodithazine® (PDZ) formulated in hydrogel, in the inactivation of mono and duo-species biofilms of Candida albicans, Candida glabrata and Candida tropicalis. Standardized suspensions of each strain were prepared and after biofilm formation, mono-species were treated with 150 and 175mg/L of PDZ for 20min (pre-irradiation time), and exposed to LED light at a dose of 37.5J/cm2 (660nm). The duo-species biofilms (C. albicans+C. glabrata and C. albicans+C. tropicalis) were treated with 150mg/L of PDZ and light. Additional samples were treated with PDZ or light only, and the control did not receive any treatment. Next, microbiological evaluation was performed by spreading the cells on Sabouraud Dextrose Agar and CHROMagar Candida for colony forming units (CFU/mL). Moreover, the total biomass of biofilm was verified using the crystal violet staining assay (CV). The data were submitted to ANOVA and Tukey post-hoc (α=0.05). The use of PDZ 150mg/L promoted a reduction of 1.0, 1.2, 1.5 log10 in the viability of C. glabrata, C. albicans and C. tropicalis, respectively. The same concentration reduced in 1.0 log10 the viability of each species grown as duo-species biofilms. The crystal violet assay showed that the use of 150mg/L reduced 24.4%, 39.2% and 43.7% of the total biomass of C. albicans, C. tropicalis and C. glabrata, respectively. aPDT did not reduce the total biomass to the duo-species biofilms. Thus, PDZ-mediated aPDT was more effective in the inactivation of mono-species biofilms of Candida spp. compared with duo-species biofilm.

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[해외논문] Photoinactivation of single and mixed biofilms of Candida albicans and non-albicans Candida species using Photodithazine® 원문보기

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[해외논문] Photoinactivation of single and mixed biofilms of Candida albicans and non-albicans Candida species using Photodithazine® 원문보기

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