Ou YS, Ma XT, Yu LW. Constitutive activation of STAT5 pathway and overexpression of target gene products correlate with malignant potential in human colorectal carcinoma.
Shijie Huaren Xiaohua Zazhi 2007;
15:1306-1309. [DOI:
10.11569/wcjd.v15.i11.1306]
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Abstract
AIM: To investigate the expression of signal transducer and activator of transcription 5 (STAT5) and target gene products including Cyclin D1 and Caspase-3 in human colorectal carcinoma (CRC), and to explore the mechanism in the tumorigenesis of CRC.
METHODS: Primary colorectal cancer and adjacent normal mucosal specimens were obtained from 60 patients undergoing CRC resection at Beijing Haidian Hospital from December 2003 to December 2005. Western blot analysis was used to measure the expression of STAT5, p-STAT5, Cyclin D1, and Caspase-3 in the cancerous and adjacent normal tissues.
RESULTS: The levels of p-STAT5, Cyclin D1, and Caspase-3 protein were increased in the cancer tissues as compared with those in the normal ones (P = 0.028, 0.035, 0.046). Over-expression of p-STAT5 was correlated with TNM staging (P = 0.026), and Caspase-3 expression was also associated with TNM staging in CRC (P = 0.041). Caspase-3 was in a positive linear correlation with p-STAT5 in tumor (r = 0.412, P < 0.05).
CONCLUSION: STAT5 signaling pathway may play an important role in the tumorigenesis of CRC, and detection of STAT5 and its target gene products may predict the malignant potential of CRC.
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