The tumor suppressor role of Src homology phosphotyrosine phosphatase 2 in hepatocellular carcinoma

被引:44
|
作者
Jiang, Chengying [1 ,2 ]
Hu, Fangke [2 ,3 ]
Tai, Yanhong [1 ]
Du, Jingli [1 ]
Mao, Beibei [4 ]
Yuan, Zengqiang [4 ]
Wang, Yan [3 ]
Wei, Lixin [1 ]
机构
[1] Chinese Peoples Liberat Army Gen Hosp, Dept Pathol, Beijing 100853, Peoples R China
[2] Nankai Univ, Coll Med, Tianjin 300071, Peoples R China
[3] Chinese Peoples Liberat Army Gen Hosp, Dept Orthoped, Beijing 100853, Peoples R China
[4] Chinese Acad Sci, Inst Biophys, Beijing 100101, Peoples R China
基金
美国国家科学基金会;
关键词
Hepatocellular carcinoma; Src homology phosphotyrosine phosphatase 2; PTPN11; Tissue microarray; Immunohistochemistry; TYROSINE-PHOSPHATASE; BREAST-CANCER; SHP2; PROTEIN; PTPN11; PROTOONCOGENE; MUTANTS; CELLS;
D O I
10.1007/s00432-011-1143-5
中图分类号
R73 [肿瘤学];
学科分类号
100214 ;
摘要
The human gene PTPN11, which encodes the non-receptor protein tyrosine phosphatase of Src homology phosphotyrosine phosphatase 2 (Shp2), has been previously well interpreted as a proto-oncogene in a variety of malignancies. However, the tumor suppressor role of Shp2 has also been reported. The present study was conducted to investigate the role of Shp2 expression and its associated clinical manifestations in hepatocellular carcinoma (HCC). A tissue microarray of 333 pairs of HCC and self-matched adjacent non-tumor tissues was constructed, and the expression of Shp2 was determined by immunohistochemistry. The results were also conformed by Western blotting and quantitative PCR of 31 self-paired fresh HCC specimens. The associations of Shp2 expression with 25 clinicopathologic features were analyzed. Overall survival analysis and multivariate analysis were performed. Significantly decreased Shp2 expression in tumor tissues (T) compared with adjacent non-tumor tissues (NT) could be detected, and the positive rate was 66.1 and 96.7%, respectively. We combined the T and NT Shp2 immunoreactivity by a variable of the decrease in Shp2 expression (Delta Shp2) and divided cases into 2 groups: T < NT and T a parts per thousand yen NT. Survival analysis showed both low Shp2 expression and T < NT group were significantly associated with short overall survival. Multivariate analysis showed Delta Shp2 was an independent prognostic marker (P = 0.033; HR: 0.527; 95% CI: 0.293-0.950). Shp2 is a tumor suppressor, and the decrease in Shp2 expression was a new prognostic marker in HCC. The oncogenic role of Shp2 was tissue specific, and the therapeutic target of human gene PTPN11 should be reconsidered.
引用
收藏
页码:637 / 646
页数:10
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