接头蛋白SH2B1在食管癌中的表达及意义

目的:研究接头蛋白SH2B1在食管癌组织中的表达水平及其临床病理意义。方法:选取120例食管癌患者手术切除的标本中的食管癌组织、癌旁组织及正常组织,分别采用免疫组织化学SABC法及Western印迹检测SH2B1的表达水平,同时分析SH2B1在食管癌组织中的表达水平与临床病理特征的关系。采用RT-PCR和Western印迹检测SH2B1在食管癌细胞株TE-1,Eca-109和正常人食管上皮细胞株HEEC中的表达水平。结果:SH2B1蛋白在食管正常组织、癌旁组织、癌组织中表达逐步增强(P<0.05),并且SH2B1蛋白在食管癌组织中的表达水平与食管癌患者的肿瘤浸润程度、TNM分期、淋巴结转移密切相关(P<0.05),而与性别、年龄、饮酒与否、肿瘤类型、分化程度均无明显相关(P>0.05);SH2B1在食管癌细胞株TE-1,Eca-109和正常人食管上皮细胞株HEEC中均表达,但在食管癌细胞株TE-1,Eca-109中均较正常人食管上皮细胞株HEEC中表达明显增高(P<0.05)。结论:SH2B1在人类食管癌中过量表达,并可能与食管癌侵袭和转移密切相关。

Expression of SH2B1 adaptor protein in oesophageal cancer and its clinical significance

Objective: To explore the expression of SH2B1 adaptor protein in oesophageal cancer and its clinical significance.
Methods: SH2B1 expression in tissue specimens of 120 primary oesophageal cancers, tissues of 120 paired adjacent non-cancer and another 120 normal tissues was analyzed by immunohistochemical SABC staining and Western blot. SH2B1 expression in the oesophageal cancer tissues was analyzed with clinicopathological parameters. SH2B1 expression of normal human esophageal epithelial cells (HEEC) and 2 oesophageal cancer cell lines, TE-1 and Eca109, were evaluated by RT-PCR and Western blot.
Results: SH2B1 expression in the normal oesophageal tissues, adjacent non-cancer tissues and cancer tissues was gradually increased (P<0.05), and significantly associated with the depth of invasion, clinical TNM stage, lymph node metastasis (P<0.05), but it did not have significant association with gender, age, drinking, type and grade of tumor (P>0.05). SH2B1 expression was detectable in all cell lines by RT-PCR and Western blot, but the expression in the two oesophageal cancer cell lines was significantly higher than that in the normal HEEC.
Conclusions: Over-expression of SH2B1 might play an important role in the occurrence and development of human oesophageal cancer and closely correlate with malignant progression of invasion and metastasis of oesophageal cancer.