Zhang DW, Yang WL, Yao Q. Expression of deleted in pancreatic carcinoma locus 4 and transforming growth factor-β1 in human colorectal carcinoma and their clinical significance.
Shijie Huaren Xiaohua Zazhi 2008;
16:1885-1889. [DOI:
10.11569/wcjd.v16.i17.1885]
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Abstract
AIM: To investigate the expression of deleted in pancreatic carcinoma locus 4 (DPC4) and transforming growth factor-β1 (TGF-β1) in human colorectal cancer tissues and their clinical significances.
METHODS: Forty-eight samples of human colorectal carcinoma were collected from patients from January 2005 to December 2005. In situ hybridization and immunohistochemistry were used to detect DPC4/TGF-β1 mRNA and protein expression respectively.
RESULTS: The expression of DPC4 mRNA was lower in colorectal carcinoma specimens as compared with that in normal colorectal specimens (52.1% vs 72.9%, P < 0.01), while TGF-β1 mRNA expression was higher in carcinoma specimens (68.8% vs 41.7%, P < 0.01). The level of DPC4 protein expression in the cancer specimens was significantly lower than that in the normal specimens, while TGF-β1 protein level were higher in the carcinoma specimens. DPC4 expression was related with the tumor size, clinical stages, differentiation degree and lymph node metastasis, while TGF-β1 expression was related with the clinic stage, differentiation degree and lymph node metastasis. There existed a close correlation between DPC4 and TGF-β1 expression (χ2 = 3.95, P < 0.05).
CONCLUSION: DPC4 and TGF-β1 are the capital factors in TGF-β transduction pathway. Low-expression of DPC4 and over-expression of TGF-β1 may serve as an index for unfavorable prognosis of colorectal carcinoma.
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