首都医科大学学报 ›› 2006, Vol. 27 ›› Issue (6): 722-726.

• 专题报道 • 上一篇    下一篇

APP17肽对长波紫外线辐射人皮肤成纤维细胞氧化损伤的保护机制

陈慧, 连石, 朱威   

  1. 首都医科大学宣武医院皮肤性病科
  • 收稿日期:2006-09-26 修回日期:1900-01-01 出版日期:2006-12-24 发布日期:2006-12-24

Study on the Protection Mechanism of APP17-mer Peptide from Ultraviolet a Induced Damage on Cultured Fibroblasts

Chen Hui, Lian Shi, Zhu Wei   

  1. Department of Dermatology and Venerology, Xuanwu Hospital, Capital University of Medical Sciences
  • Received:2006-09-26 Revised:1900-01-01 Online:2006-12-24 Published:2006-12-24

摘要: 目的 探讨β-淀粉样蛋白前体蛋白17肽(β-myloid precursor protein 17-er peptide ,APP 17)对长波紫外线(UVA)辐射后人皮肤成纤维细胞的保护作用及其机制.方法 用UVA照射培养人皮肤成纤维细胞,四甲基偶氮唑盐比色法(MTT)检测细胞活性,激光共聚焦显微镜检测活性氧(ROS)的产生,生化法检测总超氧化物歧化酶(SOD)的活性.结果 UVA辐射后成纤维细胞活性降低(P=0.000),细胞内ROS增多(P=0.000),总SOD活性增加(P=0.01).40 μmol/L的APP17肽能拮抗UVA辐射对成纤维细胞的影响(P<0.05).结论 APP17肽对UVA辐射损伤的成纤维细胞有保护作用.

关键词: 紫外线, 成纤维细胞, 放射效应, 活性氧, APP17肽

Abstract: Objective To investigate the protection mechanism of β-amyloid precursor protein 17-mer peptide from UVA induced damage on cultured fibroblasts.Methods Human skin fibroblasts were irradiated with UVA.The activity of fibroblast was detected with the assay of MTT.The activity of superoxide dismutase was measured with biochemical assay.The intracellular ROS production was measured with a confocal microscopy.Results A significant decrease of activity of fibroblast was observed after exposure to UVA(P=(0.000)).A higher level of intracellular ROS(P=(0.000))and activity of superoxide dismutase(P=0.01) were detected in the irradiated samples.40 μmol/L APP17-mer peptide could counteract the effects of UVA on fibroblasts(P<0.05).Conclusion APP 17-mer peptide has potential protective effects from UVA induced damage on cultured fibroblasts.

Key words: ultraviolet rays, fibroblasts, radiation effect, reactive oxygen species, β-amyloid precursor protein 17-mer peptide

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