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[Relationship between insulin-like growth factor II and prognosis of colorectal cancer]
1Institute of General Surgery, Nanjing General Hospital of People's Liberation Army, Nanjing 210002.
Objective:
To investigate the relationship between insulin-like growth factor II (IGF-II) and prognosis of colorectal cancer.
Methods:
One hundred and forty-two colorectal cancer patients were enrolled. In colonoscopic biopsy specimens, the expression of IGF-II and PCNA were detected immunohistochemically, while TUNEL technique was used to detect apoptosis. All patients were followed up, and disease-free survival (DFS) and overall survival (OS) rate were calculated.
Results:
The expression level of IGF-II was significantly higher in colorectal cancer than in normal colorectal mucosa. A correlation was observed between more IGF-II expression, high PCNA labeling index, and apoptotic index was demonstrated. Patients with lower expression level of IGF-II had higher DFS and OS. Multivariate analysis by means of the Cox proportional-hazards model revealed that the expression level of IGF-II was an independent prognostic predictor in colorectal cancer patients.
Conclusion:
The expression level of IGF-II is a new prognostic predictor for colorectal cancer.