National Changhua University of Education Institutional Repository : Item 987654321/13232
English  |  正體中文  |  简体中文  |  全文笔数/总笔数 : 6487/11649
造访人次 : 28592111      在线人数 : 290
RC Version 3.2 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
搜寻范围 进阶搜寻


题名: UV-induced Damages Eliminated by Arbutin and Ursolic Acid in Cell Model of Human Dermal Fibroblast WS-1 Cells
作者: Chen, Kuan-Chou;Chang, Ho-Hsing;Ko, Wang-Sheng;Wu, Charng-Lin;Chiu, Wen-Ta;Hsieh, Chiu-Lan;Peng, Robert Y.
贡献者: 生物技術研究所
日期: 2009-06
上传时间: 2012-08-07T06:57:57Z
出版者: Mohamed Hany El-Tonsy
摘要: Objectives: UV irradiation may cause dermal ageing and carcinoma. The molecular action mechanism of such an effect and the methods for prevention are still lacking.

Materials and Methods: UVA (320-400 nm) plus UVB (290-320 nm) (hereafter denoted as UVAB) was used to induce skin damages in human fibroblast WS1 (hfWS1) cells. The parameters evaluated included the cell viability, expressions of relevant enzymes including MMP-1, MMP-2, catalase, and LDH; some biochemical indices such as elastin content and lipid peroxidation. Arbutin (AB) and ursolic acid (UA) were used to evaluate whether they could show any protective effect.

Results: UVAB inhibited the viability of hfWS1 cells, leading to a lowered elastin biosynthesis, enhanced release of LDH, and up-regulation of MMP-1, MMP-2 and catalase. Moreover it accelerated lipid peroxidation. In this regard, AB and UA behaved differently. On treatment with AB and/or UA, the cell viability was effectively protected by AB at dose <10 M and by UA at 1 M. In contrast, apparent cytotoxicity was shown by UA at 10 M. Although the extracellular elastin levels were recovered, yet were insignificant. At a dose of 100 M, the lipid peroxidation was effectively suppressed by UA but not by AB. At 0.1 M, both AB and UA effectively suppressed the LDH release to the control level. Molecular action mechanism revealed both AB and UA at 1-2 M significantly down-regulated the expressions of catalase, MMP-2 but not MMP-1.

Conclusion: An appropriate combination of AB (100 M) and UA (5 M) would exhibit very strong protective effect on skin damages caused by UVAB
關聯: Journal of Egyptian Dermatology, 5(1): 5-20
显示于类别:[生物技術研究所] 期刊論文


档案 大小格式浏览次数



DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - 回馈