目的 探讨整合素β1在肝癌发生、发展中的作用.方法 应用逆转录聚合酶链反应和激光扫描共聚焦显微镜免疫荧光染色方法分别检测23份正常肝脏组织、152份肝硬化肝组织和105份肝癌组织中整合素β1 mRNA及蛋白的表达水平和分布情况,分析整合素β 1基因的表达与肝细胞肝癌临床、病理参数的关系.采用SPSS12.0统计分析软件对整合素β1表达结果及其临床病例参数的关系进行pearson x2检验,直线相关分析,pearson列联相关分析,单因素方差分析.结果 (1)整合素β1 mRNA及蛋白的相对表达量在肝癌组织分别为1.30±0.24和90.50±33.50、肝硬化组织分别为1.58±0.31和123.10±38.90、正常肝组织分别为0.37±0.08和11.90±6.00,肝癌组织、肝硬化组织中整合素β 1 mRNA及蛋白的表达均明显高于正常肝组织,F值分别为9.584和7.633,P<0.01,差异有统计学意义.(2)肝组织整合素β 1 mRNA及蛋白表达量与肝纤维化半定量评分呈正相关(mRNA:r=0.546,P<0.05;蛋白:r=0.692,P<0.01),而与肝功能无明显相关性.整合素β1的表达与肝癌Edmondson病理分级、有无包膜侵犯、有无转移、HBsAg感染呈正相关,而与肿瘤大小、结节数目、甲胎蛋白水平无明显相关性. 结论整合素素β1可能参与了肝纤维化--肝硬化--肝癌这一动态的病理过程,在肝细胞恶性转化中发挥重要作用.
Objective To investigate the expression of integrin beta 1 in hepatic cirrhosis (HC) and hepatocellular carcinoma (HCC). Methods The expression of integrin beta 1 in HCC, HC and normal liver tissues was detected by reverse transcriptase-polymerase chain reaction (RT-PCR) and laser scanning confocal microscopy (LSCM). The association between the integrin beta 1 expression and clinical pathological features were analyzed. Results (1) The levels of integrin beta 1 mRNA and protein in the HCC (1.30 ±0.24, 90.50 ± 33.50) and HC (1.58 ± 0.31, 123.10 ± 38.90) were much higher than that in the normal hepatic tissue (0.37 ± 0.08, 11.90 ± 6.00) (P 〈 0.05). (2) The expression of integrin beta 1 was associated with HC (r = 0.692), Edmondson pathologic grade (F = 13.618), encapsulation (F = 17.857) and metastasis (F = 38.857) (P 〈 0.01). Conclusion Integrin beta 1 may play an important role in the development of hepatic fibrosis, hepatic cirrhosis and hepatocellular carcinoma.