J.Jpn. Surg. Soc.. 99(7): 436-440, 1998

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Feature topic

IMPLICATION OF VEGF AND MMPs IN HEPATIOC METASTASIS OF HUMAN CLON CANCER

This article describes the significance of mRNA expression of VEGF, MMP-2, MMP-9, and MT1-MMP in human colorectal cancer metastases, particularly heptic metastases. The levels of gene expression were quantified by Northern blot hybridization in tumor and nontumor tissues obtained from 66 primary cases. Significantly higher levels of expression of VEGF mRNA were observed in patients with synchronous hepatic metstases (n＝15) and/or lymph node metastases than in those without.
Patients with synchronous hepatic metastases had significantly higher levels of mRNA expression of all MMP genes than in those without, and no apparent correlation was seen between MMP mRNA expression and other clinicopathologic variables. Also in a study including 4 cases of metachronous hepatic metastases after surgery, VEGF, MMP-9, and MT1-MMP mRNA expression were significantly higher in patients with hepatic metastases than in those without, indicating that these are predictable markers for hepatic metastases. Immunohistochemical examination revealed that VEGF and MT1-MMP were localized mainly in cancer cells, whereas MMP-2 and MMP-9 were distributed throughout stromal cells such as fibroblasts and leukocytes in tumor tissues.

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