中期因子转录物及其蛋白在肝细胞癌中的定位与表达研究

Expression and localization of midkine in hepatocellular carcinoma

目的了解中期因子 (Midkine,MK)转录物及其蛋白产物在肝细胞癌 (hepatocellularcarci noma ,HCC)中的定位情况与表达特点。方法应用原位杂交、免疫组织化学染色等方法对 33例人HCC组织、10例良性肝肿瘤组织及其配对瘤旁肝组织进行了MKmRNA及蛋白的定位与表达研究。结果免疫组织化学结果与原位杂交结果具有一致性 (χ2 =0 5 0 0 ,P >0 0 5 )。MK在HCC组织中呈高表达。MKmRNA及蛋白的阳性信号聚集于HCC细胞质。在HCC细胞外组织中亦有MK表达 ,尤以血管密集处明显。HCCMK表达率与肝癌组织学类型、分级等临床病理学特点无相关性。结论HCC在mRNA和蛋白水平上表达MK增加 。

ObjectiveTo investigate the expression and localization of midkine (MK) in human hepatocellular carcinoma. MethodsIn situ hybridization and immunohistochemical analysis for MK were performed on samples of both tumor tissues and paratumor tissues from HCC and benign liver tumors. ResultsThe distribution and localization of the MK transcripts′ signals determined by in situ hybridization were similar to those obtained by immunohistochemical analysis. Most HCC tissues showed enhanced positive reaction within cytoplasm to both MK probe and MK immunostaining. There was no significant difference in clinicopathological parameters between MK negative and positive cases of HCC. ConclusionsHuman hepatocellular carcinoma overexpresses MK at the mRNA and protein level.