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研究生:陳彥伶
研究生(外文):Yen-Ling Chen
論文名稱:桑椹花青素粗萃物對人類皮膚纖維母細胞光老化之保護
論文名稱(外文):Protective Effect of Crude Anthocyanin Extract from Mulberry on Ultraviolet-Irradiated Human Skin Fibroblasts
指導教授:吳瑞碧
指導教授(外文):James Swi-Bea Wu
口試委員:吳明昌沈賜川廖慧芬
口試委員(外文):Ming-Chang WuSzu-Chuan ShenHui-Fen Liao
口試日期:2014-06-06
學位類別:碩士
校院名稱:國立臺灣大學
系所名稱:食品科技研究所
學門:農業科學學門
學類:食品科學類
論文種類:學術論文
論文出版年:2014
畢業學年度:102
語文別:中文
論文頁數:67
中文關鍵詞:桑椹紫外線活性氧膠原蛋白皮膚纖維母細胞
外文關鍵詞:mulberryultraviolet radiationROScollagenskin fibroblast
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皮膚長時間曝曬於紫外線 (ultraviolet, UV) 中,可能會造成光老化,其主要症狀包括產生皺紋及黑色素沉澱等,其中皺紋的產生與膠原蛋白減少有關。UVA能穿透至皮膚真皮層,刺激真皮纖維細胞內的活性氧物質 (Reactive oxygen species, ROS) 增加,經一連串訊息傳遞路徑,最終抑制膠原蛋白生成並促進基質金屬蛋白&;#37238; (Matrix Metalloproteinase-1, MMP-1) 表現,進而促進膠原蛋白之降解。抗氧化物質能藉由抑制細胞內ROS生成,達到減緩皮膚膠原蛋白流失之保護功效。桑椹 (Morus alba) 是台灣抗氧化活性最高的常見水果之一,富含花青素,有很強的抗氧化功效,能降低細胞內氧化壓力。本研究目的為探討桑椹花青素粗萃物對紫外線造成皮膚光老化之保護功效。桑椹經均質、離心、冷凍乾燥,製得桑椹汁粉末 (mulberry juice powder, MJP),MJP再經固相萃取管柱分離,凍乾後得桑椹花青素粗萃物 (anthocyanin crude extract from mulberry juice, AEMJ)。將MJP和AEMJ回溶後,測定其花青素含量、酪胺酸&;#37238;活性之抑制、及DPPH、ORAC等抗氧化力。結果顯示,AEMJ中花青素含量約為桑椹汁之15倍,清除DPPH能力也由119 μmol TE/gDW增為2506 μmol TE/gDW,而500

Exposure to ultraviolet (UV) radiation may cause skin photoaging, including pigmentation and wrinkling. The latter is relevant to degradation of collagen. UV radiation promotes the generation of reactive oxygen species (ROS) in skin fibroblasts, and therefore induce signal pathways to accelerate the degradation of collagen. Antioxidants protect cells from UV-induced oxidative stress. Mulberry (Morus alba) fruit is rich in anthocyanin with great antioxidative properties. The present study aimed at investigating the protective effect of mulberry juice and anthocyanin crude extract from mulberry on UV-induced photoaging in human skin using fibroblasts as the model. Mulberry fruit were bought from Hualien, Taiwan, homogenized, centrifuged to recover the juice, and lyophilized to obtain mulberry juice powder (MJP). Anthocyanin crude extract from mulberry juice (AEMJ) was separated from MJP by solid phase extraction (SPE). MJP and AEMJ were re-dissolved to determine the anthocyanin content, anti-tyrosinase and antioxidant activities. The anthocyanin content of AEMJ is about 15-fold that of MJP. The DPPH scavenging activity of AEMJ is 2506 μmol TE/gDW, while that of MJP is 119 μmol TE/gDW only. The anti-tyrosinase activity of 500

誌謝 i
中文摘要 ii
ABSTRACT iii
目錄 v
圖目錄 vii
表目錄 ix
第一章 引言 1
第二章 文獻探討 2
第一節 皮膚光老化 2
(1) 皮膚自然老化與光老化 2
(2) 皮膚構造 2
(3) 紫外光與皮膚損傷 3
(4) 老化機制 3
第二節 桑椹 12
(1) 保健功效 12
(2) 機能性成分 12
第三章 材料與方法 13
第一節 實驗目的與架構 13
第二節 實驗材料 15
(1) 實驗原料 15
(2) 實驗細胞 18
(3) 實驗藥品與試劑 18
(4) 實驗儀器設備 19
(5) 統計分析 20
第三節 實驗方法 21
(1) 總花青素含量測定 21
(2) 抗氧化能力測定 22
(3) 抑制酪胺酸&;#37238;活性測定 25
(4) 細胞試驗 26
第四章 結果與討論 33
第一節 總花青素含量測定 33
第二節 抗氧化能力測定 34
(1) 清除DPPH自由基能力測定 34
(2) ORAC值 35
第三節 酪胺酸&;#37238;活性之抑制 38
第四節 細胞試驗 40
(1) 細胞接種量標準曲線 40
(2) 樣品之細胞毒性 40
(3) UVA強度試驗 44
(4) 桑椹汁及其粗萃物對紫外光刺激細胞保護功效評估 47
第五章 結論 62
第六章 參考文獻 63


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