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  • Title: Matrix metalloproteinase-1 promoter polymorphism 1G/2G is correlated with colorectal cancer invasiveness.
    Author: Ghilardi G, Biondi ML, Mangoni J, Leviti S, DeMonti M, Guagnellini E, Scorza R.
    Journal: Clin Cancer Res; 2001 Aug; 7(8):2344-6. PubMed ID: 11489811.
    Abstract:
    PURPOSE: Matrix metalloproteinase-1 (MMP-1) is likely to be involved in invasion and metastasis of several tumors by degrading the extracellular matrix. A single guanine insertion polymorphism (2G) in the MMP-1 promoter region creates an Ets binding site causing the elevation of transcriptional level and local expression of MMP-1. The aim of this study was to evaluate the impact of this 2G insertion type polymorphism on invasion and metastasis of colorectal cancer (CRC). EXPERIMENTAL DESIGN: We genotyped for this 1G/2G polymorphism 60 patients, who were operated on for CRC and followed for 6-30 months (median: 21). A control population of 164 age- and sex-matched tumor-free subjects was also genotyped for the same polymorphism. RESULTS: The proportion of 2G homozygotes was higher in the CRC group than in the controls (P = 0.014; odds ratio, 2.21; 95% confidence interval, 1.17-4.16). The CRC group was divided in a group without metastasis (M-) and a group that had developed metastasis (M+). At the time of diagnosis, 2G homozygotes were more represented in the M+ group than in M- (P = 0.0082; odds ratio, 4.73; 95% confidence interval, 1.46-15.26). The difference between M- patients and controls did not achieve statistical significance (P = 0.52). CONCLUSIONS: Our results suggest that the presence of 2G polymorphism at the MMP-1 promoter region may favor the growth and the metastatic process in CRC patients and could be looked at as a risk factor for a worse prognosis.
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