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자료유형
학술저널
저자정보
저널정보
대한임상검사과학회 대한임상검사과학회지 대한임상검사과학회지 제47권 제1호
발행연도
2015.1
수록면
6 - 10 (5page)

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초록· 키워드

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Photodynamic therapy (PDT) apply photosensitizers and light. The purpose of this study was to evaluate the in vitro efficacy of PDT using blue LED (light emitting diode) with photofrin and radachlorin for Propionibacterium acnes. The colony forming units method was used to assess the antibacterial activity. Suspension (1 mL) containing P. acnes at 1×105 CFU/mL were prepared and then 2 fold serial diluted to 12.5 g/mL from 50 g/mL concentration of photofrin and radachlorin. After 60 minutes incubation, light was irradiated for 10 to 30 minutes using the following light source of wavelength 460 nm, each energy density 36, 72 and 108 J/cm2. Bacterial growth was evaluated after 72 hours incubation in a Phenylethanol Blood Agar (PEBA) culture. In addition, flow cytometric analysis were performed to measure the live cell after PDT. Also transmission electron microscopy (TEM) was employed to evaluate the effect of pathogens by PDT. The PDT Group was perfectly killed to all kind of photosensitizers dose of 12.5 g/mL with irradiation of 10 minutes. Also other Groups were killed to all kind of photosensitizers dose of 6.25 g/mL with irradiation time of 20 and 30 minutes. The flow cytometry showed a lower number of viable bacteria in the PDT group compared to the control group. The images of the TEM results were showed in cytoplasmic membrane damage and partially deformed to cell morphologies. These results suggest that radachlorin and photofrin combine blue LED PDT can be effectively treated when was proved treatment for acnes therapy.

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