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  5. Coumarin衍生物的抗氧化作用之活性探討
 
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Coumarin衍生物的抗氧化作用之活性探討

Other Title
Study on the antioxidant activity of coumarin derivatives
Type
thesis
Date Issued
2010-06-30
Author(s)
周裕翔
Advisor
周敦穗
Subjects
系所名稱:醫學科學研究所
Description
學位別:碩士
語文別:中文
指導教授:周敦穗
共同指導教授:許準榕
口試委員:李居仁;張怡;吳志仁
中文關鍵字:Coumarin衍生物;小鼠黑色素細胞瘤
Abstract
在之前的研究中我們確定了baicalein會刺激B16F10小鼠黑色素瘤細胞株產生superoxide及hydroxyl radical,且認為此reactive oxygen species (ROS)的生成過程與arachidonic acid (AA)的代謝路徑有關,同時baicalein也造成了細胞存活率下降和細胞凋亡。本次研究我們用electron spin resonance (ESR)直接分析不同的系統,來偵測coumarin 衍生物的抗氧化活性。第一個系統是使用DPPH,分析結果發現各種coumarin 衍生物皆有抗氧化的活性;第二個系統是xanthine oxidase / hypoxanthine系統,直接偵測superoxide的強度,結果發現各種coumarin 衍生物也都有抗氧化的活性;第三個系統是直接分析B16F10老鼠黑色素瘤腫瘤細胞受到baicalein刺激後所釋放之hydroxyl radical,結果發現在coumarin 衍生物中的Mei-174、Mei-215、Mei-228、Mei-234也有抗氧化的活性。我們也使用MTT assay來觀察其對於B16F10小鼠黑色素瘤細胞是否可以減少baicalein所造成的細胞存活率下降,結果發現給予各種coumarin 衍生物皆沒有明顯的影響。各種coumarin 衍生物在不同系統的抗氧化程度可供日後繼續探討其機轉的參考。
URI
https://203.71.86.71/handle/123456789/13228

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