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  5. 羥基紅花黃素A在UVA誘導光損傷下對人類皮膚角質細胞之影響
 
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羥基紅花黃素A在UVA誘導光損傷下對人類皮膚角質細胞之影響

Other Title
The effects of hydroxysafflor yellow A (HSYA) on UVA-induced damage in HaCaT keratinocytes
Type
thesis
Date Issued
2015-06-12
Author(s)
余思潔
Advisor
簡怡雯
Subjects
系所名稱:保健營養學研究所
Description
學位別:碩士
語文別:中文
指導教授:簡怡雯
共同指導教授:
口試委員:黃惠宇;趙振瑞
中文關鍵字:UVA;光損傷;羥基紅花黃素A;HaCaT細胞
英文關鍵字:UVA;hydroxysafflor yellow A (HSYA);oxidative stress;HaCaT keratinocytes;MMPs
Abstract
紫外線 (ultraviolet light, UV) 的曝曬是一個潛在性的環境危害,過量曝曬會引起許多急性或慢性的皮膚損傷。造成皮膚光損傷主要是接觸紫外線的照射而引起細胞內活性氧物質的生成,提升細胞內的氧化壓力而誘發DNA的損傷以及細胞膜脂質過氧化,促進發炎反應並干擾細胞的代謝途徑。紅花,學名Carthamus tinctorius L.為傳統的藥用植物,富含黃酮類 (flavonoids),羥基紅花黃素A (hydroxysafflor yellow A, HSYA) 為主要的活性成分。近年研究指出HSYA可透過清除自由基並改善氧化壓力傷害而被認為具有抗氧化、抗凝血、抗發炎等功用,不過並未在皮膚保健的領域作相關探討,故本研究的目的在探討羥基紅花黃素A (HSYA)在細胞模式中對於光損傷的影響。實驗方法:事先給予HaCaT皮膚角質細胞羥基紅花黃素A培養24小時,在予以照射能量200 mJ/cm2的UVA,探討細胞內的ROS和MDA的生成以評估氧化壓力,並測量MMP-1, MMP-2, MMP-9以及促發炎因子COX-2的mRNA表現量。結果顯示給予HSYA的介入可以明顯提高細胞存活率,減少氧化自由基與脂質過氧化物MDA的生成,並可藉由降低氧化壓力來降低細胞內基質金屬蛋白酶MMP-1, MMP-2, MMP-9以及促發炎反應因子COX-2的mRNA表現量來達到細胞於光損傷下的保護作用。因此,羥基紅花黃素A對於UVA所引起的光損傷具有保護效果。
URI
https://203.71.86.71/handle/123456789/57084

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