[Expression of cancerous inhibitor of protein phosphatase 2A in tissue microarray of colorectal cancer and its clinical significance].

ABSTRACT

OBJECTIVE: To investigate the expression of cancerous inhibitor of protein phosphatase 2A(CIP2A) in human colorectal cancer, and to examine the association of CIP2A expression with clinicopathology and prognosis. METHODS: CIP2A expression in colorectal cancer tissue microarray of 92 cases was detected by immunohistochemistry method. RESULTS: Up-regulated CIP2A expression was closely related with TNM staging, histological type, peritoneal seeding and liver metastasis (all P<0.05), but not related with gender, age, tumor location, CEA, family history and grade of differentiation. Overall survival rates of 1-, 3-, 5-, and 10-year in high CIP2A expression group were 97.1%, 71.4%, 59.2%, and 44.4% respectively, significantly lower than 98.2%, 85.7%, 80.3%, and 74.9% in low CIP2A expression group(P=0.021). Multivariate analysis showed that CIP2A was not an independent factor associated with prognosis(P=0.099, HR=1.982, 95%CI0.879 to 4.469). CONCLUSIONS: Up-regulated CIP2A expression is closely related to clinicopathology of colorectal cancer. CIP2A may be used as a potential predictive marker of metastasis, prognosis and therapeutic target in colorectal cancer.