中文摘要：

目的检测整合素β1在皮肤鳞状细胞癌组织中的表达情况,探索干细胞相关因子与肿瘤的关系。方法采用免疫组织化学及细胞学染色方法检测整合素β1在人皮肤鳞状细胞癌组织及人皮肤鳞状细胞癌细胞株A431中的表达,全反式维甲酸(ATRA)诱导鳞状细胞癌细胞分化,RT-PCR检测分化前后整合素β1变化水平。结果在高分化鳞状细胞癌中,整合素β1在肿瘤团块外周基底样细胞呈连续性表达,内侧至团块中央可见散在或岛屿状阳性细胞;在低分化鳞状细胞癌组织中,岛屿状阳性细胞明显增多,呈弥漫分布;在A431细胞中,整合素β1散在表达于肿瘤细胞。ATRA诱导24 h和48 h后,ATRA处理组整合素β1与内参照β-actin的RT-PCR产物电泳光密度值之比分别为0.071±0.025和0.029±0.018,明显低于对照组的0.148±0.027和0.136±0.011(P<0.05)。结论整合素β1在皮肤鳞状细胞癌组织培养肿瘤细胞中具有异质性表达模式,并随肿瘤细胞分化程度增高而表达下降,提示整合素β1与皮肤鳞状细胞癌发生及可能存在的肿瘤干细胞具有密切关系。

英文摘要：

Objective To study the expression of integrin 61 in squamous cell carcinoma(SCC) and explore the relationship between stem cell marker and SCC.Methods The expressions of integrinβ1 in SCC tissues and SCC cell strain A431 were detected with immunohistochemical methods and cell staining method. The differentiation of SCC cells were induced with all-trans-retinoic acid(ATRA).The changes of integrinβ1 levels before and after induction were detected with RT-PCR.Results In highly differentiated SCC tissues, integ...