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MMP-1 is a prognostic marker for hematogenous metastasis of colorectal cancer
1Department of Surgical Oncology. Department of Transfusion Medicine, Graduate School of Medical Sciences, Faculty of Medicine, the University of Tokyo, Tokyo, Japan.
Background:
Degradation of basement membrane and extracellular matrix by matrix metalloproteinases (MMPs) is believed to be an essential step in the complicated process of hematogenous metastasis. MMP-1 is a member of collagenases, a family of MMPs that degrades collagens type I, II, and III, main components of the interstitial stroma. The purpose of this study was to investigate the expression of MMP-1 in colorectal cancer and its correlation with hematogenous metastasis. Patients and Methods. We examined 133 cases of colorectal cancer (Dukes A: 72; Dukes B: 26; Dukes C: 23; Dukes D: 12). Sections were cut from formalin-fixed, paraffin-embedded samples containing the deepest site of cancer invasion and stained immunohistochemically with a monoclonal antibody to MMP-1. According to the area of the tumor that was stained, patients were divided into high- and low-MMP-1 expression groups.
Results:
MMP-1 expression was observed in the cytoplasm of cancer cells, some stromal cells, and a few normal epithelial cells of colonic mucosa. High MMP-1 expression was found in 47 (35.3%) cases and low in 86 (64.7%). Hematogenous metastasis was identified in 14 (29.8%) of high-MMP-1 groups and 12 (13.9%) of low-MMP-1 groups. MMP-1 expression significantly correlated with hematogenous metastasis of colorectal cancer, but no correlation was found between MMP-1 expression and the other clinicopathological features investigated.
Conclusions:
MMP-1 expression may be a novel marker for hematogenous metastasis of colorectal cancer, and its inhibition may be a strategy for prevention of metastasis.
Insights
Matrix metalloproteinase-1 (MMP-1) expression in colorectal cancer correlates with hematogenous metastasis. High MMP-1 levels may indicate a higher risk of metastasis, suggesting MMP-1 as a potential therapeutic target.
Area of Science:
- Oncology
- Cancer Biology
- Molecular Pathology
Background:
- Matrix metalloproteinases (MMPs) degrade extracellular matrix, facilitating cancer metastasis.
- MMP-1, a collagenase, targets key stromal collagens (Type I, II, III).
- Understanding MMP-1's role in colorectal cancer metastasis is crucial.
Purpose of the Study:
- To investigate the expression of MMP-1 in colorectal cancer.
- To determine the correlation between MMP-1 expression and hematogenous metastasis.
Main Methods:
- Examined 133 colorectal cancer cases (Dukes A-D).
- Used immunohistochemistry with anti-MMP-1 antibody on tumor invasion sites.
- Categorized patients into high- and low-MMP-1 expression groups based on staining.
Main Results:
- MMP-1 was detected in cancer cells, stroma, and some normal mucosa.
- High MMP-1 expression was observed in 35.3% of cases.
- Hematogenous metastasis was significantly more frequent in the high-MMP-1 group (29.8%) compared to the low-MMP-1 group (13.9%).
Conclusions:
- MMP-1 expression is a significant indicator of hematogenous metastasis in colorectal cancer.
- MMP-1 may serve as a novel prognostic marker.
- Inhibiting MMP-1 could be a potential strategy to prevent colorectal cancer metastasis.
