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Fluorescence monitoring and effect of photodynamic therapy for port wine stains
Date:3/1/2010

This release is available in Chinese.

It is known that fluctuations in the treatment outcome of photodynamic therapy (PDT) between patients are related to the concentration of photosensitizer in target tissue. The purpose of a study, by Wang et al, published in the February 2010 issue of Experimental Biology and Medicine was to establish a fluorescence method not only providing a semi-quantitative measurement of photosensitizer concentration but also predicting the efficacy of PDT for Port Wine Stains (PWS).

This work was conducted by Ying Wang and Xiaohua Liao when they were postgraduate students under the direction of Professor Ying Gu and Professor Rong Chen, and colleagues in the Department of Laser Medicine at the Chinese People's Liberation Army General Hospital. Currently, Ying Wang is a physician at Chinese PLA General Hospital, Xiaohua Liao works at Fujian Metrology Institute. An algorithm which can yield a semi-quantitative measurement of photosensitizer concentration was established in this study. Then a therapeutic effect correlation index (TECI) was proposed as the area under the photosensitizer concentration-time curve during PDT. The correlation between TECI and PDT treatment outcome was analyzed from 31 PWS patients at the Chinese People's Liberation Army General Hospital.

Dr. Wang noted that "A non-invasive fluorescence method that can monitor photosensitizer concentration during PDT for PWS was established, and a therapeutic effect correlation index (TECI) was verified to be positively correlated with PDT outcome for the first time in this paper."

Dr. Steven R. Goodman, Editor-in-Chief of Experimental Biology and Medicine said "The results of the study by Wang et al suggest that fluorescence spectroscopy can be used in situ to monitor skin photosensitizer concentration during PDT. This may provide a valuable diagnostic tool to predict PDT outcome."


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Contact: Dr. Ying Gu
guyinglaser@sina.com
Society for Experimental Biology and Medicine
Source:Eurekalert

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