摘要目的 探讨YB-1蛋白在肝细胞癌( Hepatocellular carcinoma,HCC)组织、2种肝癌细胞株、正常肝细胞株中的表达及其与肝癌患者临床参数的关系.方法 采用免疫组化检测YB-1蛋白在58例HCC组织及相应例癌旁组织、20例正常肝组织中的表达；用Western blot法检测上述HCC 组织、癌旁组织、正常肝组织及肝癌细胞株QGY-7701、SMMC-7721、正常肝细胞株L02中核移位YB-1蛋白表达.结果 免疫组化显示在HCC组织,YB-1蛋白主要表达于癌细胞胞浆,其阳性率(72.4％,42/58)明显高于癌旁(41.4％,24/58及正常肝组织(35.0％,7/2) (P＜0.05).其中18例(31.0％,18/58)HCC组织伴有明显YB-1核阳性表达,且核表达与HCC病理分级、门静脉癌栓、肿瘤大小相关(P＜0.05).Western blot检测同样证实核移位的YB-1蛋白在肝癌组织(0.474±0.107)显著高于癌旁组织及正常肝组织(P＜0.05).核移位的YB-1蛋白在2种肝癌细胞株中均高于正常肝细胞株(P＜0.05),其差异较织织更为明显.结论 YB-1蛋白在HCC中高表达及核移位可能促进了肝癌的发生发展,有可能成为肝癌治疗的新靶点.

abstractsObjective To study the expression levels of YB-1 protein in hepatocellular carcinoma (HCC) tissues,tissues adjacent to tumour and normal liver tissues,and to explore the clinical significance.Methods To study the expression levels of YB-1 protein,immunochemistry was carried out on 58 HCC tissues and their corresponding adjacent tissues to tumour and on 20 normal liver tissues.The YB-1 protein with nuclear translocation was detected by Western blot in HCC tissues,tissues adjacent to tumour,normal liver tissues,HCC cell lines including QGY-7701 and SMMC-7721,and a normal hepatic cell line LO2.Results Positive signals of YB-1 protein were detected at a high level in HCC tissues (72.4％,42/58) when compared to tissues adjacent to tumour (41.4％,24/58) and to normal liver tissues (35 ％,7/20) (P＞0.05).The nuclear expression of YB-1 (31％,18/58) was significantly correlated with the pathological grade,tumour size and portal venous invasion (P＜0.05).Using Western blot,the YB-1 protein with nuclear translocation was expressed at a higher level in HCC tissues (0.474±0.107) than in tissues adjacent to tumour and in normal liver tissues (P＜0.05).Similar results were obtained in HCC cell lines and the normal hepatic cell line (P＜0.05).Conclusion The high expression of YB-1 in HCC and its nuclear translocation may be involved in human HCC progression.YB-1 may be a potential target for HCC treatment in the future.