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Effect of 308 nm monochromatic excimer light on the apoptosis, cell cycle and stem cell factor expression of human keratinocytes
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- Author:
- No author available
- Journal Title:
- CHINESE JOURNAL OF DERMATOLOGY
- Issue:
- 6
- DOI:
- 10.3760/j.issn:0412-4030.2007.06.001
- Key Word:
- 角蛋白细胞;细胞凋亡;干细胞因子;准分子光
Abstract： 目的 探讨单频308 nm准分子光对角质形成细胞的凋亡、细胞周期和干细胞因子表达的影响.方法 采用MTT法确定最适能量密度,用流式细胞仪检测单频308 nm准分子光对角质形成细胞的凋亡和细胞周期的影响.RT-PCR和蛋白质印迹分别检测单频308 nm准分子光对角质形成细胞干细胞因子基因转录和蛋白表达水平的影响.结果 用400 mJ/cm2单频308 nm准分子光照射角质形成细胞后24 h和48 h,细胞凋亡明显增加(P＜0.05),48 h时S期细胞虽有增加,但无统计学意义(P=0.059).干细胞因子mRNA和蛋白表达均增加,在照射后12 h左右达高峰.且蛋白表达随着照射剂量的增加而增加,但mRNA的表达未随剂量的增加而改变.结论 单频308 nm准分子光可导致角质形成细胞凋亡,促进干细胞因子的表达,这可能是准分子光治疗白癜风的机制之一.
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