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- W1978043148 abstract "Background. Matrix metalloproteinase-7 (MMP-7) is an important matrix-degrading enzyme that has a large role in the invasion and metastasis of cancer. To discover the mechanism of the formation of peritoneal dissemination in gastric cancer, we studied the mRNA and protein expression of MMP-7 in primary gastric cancers and peritoneal dissemination. Methods. MMP-7 expression in primary gastric cancers (136 patients) was studied by immunohistochemistry and reverse transcription-polymerase chain reaction (RT-PCR), and the results were compared with chinicopathological parameters. Results. MMP-7 mRNA was expressed in 28 (53%) of 53 primary gastric cancers, but not in normal gastric mucosa, fibroblasts, or mesothelial cells. An immunohistochemical method demonstrated that MMP-7 immunoreactivity was found on the cell membrane and cytoplasm of cancer cells. Among 136 primary tumors, 70 (53%) tumors overexpressed MMP-7, and MMP-7 tissue status had significant positive correlation with serosal involvement, lymph node metastasis, poor differentiation of cancer, and peritoneal dissemination. Patients with MMP-7-positive tumor had significantly poorer survival and more frequently died of peritoneal recurrence than did those with MMP-7-negative tumors. All 6 examined peritoneal disseminations expressed MMP-7 mRNA, and 13 of 14 peritoneal disseminations showed immunoreactivity to anti-human MMP-7 monoclonal antibody. Logistic regression analysis showed that MMP-7 immunohistological status was an independent risk factor for peritoneal dissemination, and patients with MMP-7 mRNA-positive tumors had a 9.9-fold higher relative risk for peritoneal metastasis. Conclusion. These results strongly suggest that MMP-7 may have a large role in the formation of peritoneal dissemination in gastric cancer, and that clonal selection of cancer cells with MMP-7 overexpression may occur during the invasion of intraperitoneal free cancer cells from the peritoneal surface into the subperitoneal tissue. MMP-7 tissue status in the primary tumor may be a good indicator of peritoneal dissemination." @default.
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- W1978043148 date "2000-09-29" @default.
- W1978043148 modified "2023-09-23" @default.
- W1978043148 title "Role of MMP-7 in the formation of peritoneal dissemination in gastric cancer" @default.
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- W1978043148 doi "https://doi.org/10.1007/pl00011698" @default.
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