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  2. .TMU Publications / 北醫出版品(教師升等著作 / 教學實踐 / 學位論文)
  3. .博碩士學位論文
  4. .98學年度
  5. (一) 樟葉槭之成分研究 (二) 兒茶酚衍生物於人類黑色素細胞活性探討
 
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(一) 樟葉槭之成分研究 (二) 兒茶酚衍生物於人類黑色素細胞活性探討

Other Title
(1) The constituents from Acer albopurpurascens Hayata
(2) The activities of catechol derivatives in human epidermal melanocytes
Type
thesis
Date Issued
2010-07-12
Author(s)
黃靜儀
Advisor
李美賢
Subjects
系所名稱:生藥學研究所
Description
學位別:碩士
語文別:中文
指導教授:李美賢
共同指導教授:
口試委員:郭悅雄;張溫良
中文關鍵字:樟葉槭;台灣特有種;人類黑色素細胞;酪胺酸酵素
Abstract
樟葉槭 (Acer albopurpurascens Hayata) 為楓科 (Aceraceaez) 常綠喬木,台灣特有種,分布於台灣全島低至中海拔山區。本論文第一部分乃採集樟葉槭之葉部,以95%乙醇萃取,進行成分分離。經管柱層析分離純化得到七個化合物,經由光譜分析與文獻比對。結構為
chlorgenic acid methyl ester (1)、(-)-epicatechin (2) tricin-7-O-β-D-glucopyranoside (3)、tricin-4´-O-β-D-glucopyranoside (4)、quercetin (5)、dendratnhemoside
A (6) 和 dihydrodendranthemoside A (7)。第二部分為探討由白花水竹草 (Trandescantia albiflora Kunth) 所分出七種兒茶酚
(catechol) 化合物及其半合成衍生物,對人類正常黑色素細胞抑制黑色素生成的活性。此十六種化合物於100 μM濃度下對於人類正常黑色素細胞之細胞存活率皆大於80%,進一步進行細胞內酪胺酸酵素活性測試,結果顯示化合物AR9 及AR10 具最佳之酪胺酸酵素抑制活性,其 IC50 分別為 81.1及 90.7 μM;以西方墨點法分析,結果顯示AR9 具有抑制酪胺酸酵素和酪胺酸相關蛋白酵素-2 蛋白質之表現,而AR10 具有抑制酪胺酸酵素蛋白質之表現,對於酪胺酸相關蛋白酵素-1 及酪胺酸相關蛋白酵素-2 則無明顯作用。另外以細胞免疫染色法觀察亦有相同的結果。
URI
https://203.71.86.71/handle/123456789/13138

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