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The phosphorylated p53 protein expressions in epidermal Langerhans cell irradiated by UVB
Author(s): 
Pages: 134-136
Year: Issue:  3
Journal: JOURNAL OF CLINICAL DERMATOLOGY

Keyword:  朗格汉斯细胞中波紫外线p53蛋白磷酸化;
Abstract: 目的:研究皮肤朗格汉斯(Langerhans)细胞(LC)在不同剂量中波紫外线(UVB)照射前、后p53蛋白磷酸化水平的差异.方法:联合采用密度梯度离心和免疫磁珠的方法分离纯化LC,将LC分为实验组和对照组,实验组分别接受30、60和90nJ/cm2 UVB辐射,辐射后4 h提取总蛋白,采用Western-blotting法检测各组细胞中p53蛋白及磷酸化p53蛋白的表达量,并比较两者之间的差异.结果:接受UVB辐射后,皮肤LC中p53蛋白表达基本无变化,而p53蛋白磷酸化水平显著升高,差异具有统计学意义,并呈剂量依赖性.结论:UVB辐射可刺激p53蛋白磷酸化,并呈剂量依赖性,进而诱导p53蛋白活化,发挥其下游功能.
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