淡江大學機構典藏:Item 987654321/42012
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    題名: Development of a whole-organism model to screen new compounds for sun protection
    作者: Chen, Yau-hung
    貢獻者: 淡江大學化學學系;淡江大學數學學系
    關鍵詞: EGCG;Fin;Tea;UV;Zebrafish
    日期: 2008-11-13
    上傳時間: 2010-08-10 09:50:19 (UTC+8)
    出版者: Springer
    摘要: We used zebrafish as a whole-organism model to screen new compounds for sun protection activity. First of all, we designed a series of UVB exposure experiments and recorded the phenotypic changes of zebrafish embryos. Results showed that 100 mJ/cm2 of UVB given six times separated by 30 min intervals is the best condition. Fin malformation (reduced and/or absent fin) phenotypes are the most evident consequences after exposure to UVB. Each fin was affected by UVB, including pelvic, ventral, caudal, and dorsal fin, but pelvic fin seemed to be the most sensitive target after UVB exposure. We furthermore carried out “prevention” and “treatment” experiments using green tea extract and/or (−)-epigallocatechin (EGCG) to test this whole-organism model by observing the morphological changes of all fins (especially pelvic fin) after UVB exposure. Effects of UVB, green tea extract and EGCG on fin development were assessed using the Kaplan–Meier analysis, log-rank test and Cox proportional hazards regression. Results showed that a zebrafish pelvic fin in the UVB + green tea (treatment) group is 5.51 (range from 2.39 to 14.90) times, one in the UVB + green tea (prevention) group is 7.04 (range from 3.11 to 18.92) times, and one in the 25 ppm of EGCG (prevention) group is 22.19 (range from 9.40 to 61.50) times more likely to return to normal fin than one in the UVB only group. On the basis of these observations, we believe this model is effective for screening the higher stability and lower toxicity of new compounds, such as small chemicals which are derivative from EGCG or other dietary agents for sun protection.
    關聯: Marine Biotechnology 11(3),　p.419-429
    DOI: 10.1007/s10126-008-9159-9
    顯示於類別:[數學學系暨研究所] 期刊論文
    [化學學系暨研究所] 期刊論文

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