期刊
FASEB JOURNAL
卷 15, 期 6, 页码 988-994出版社
FEDERATION AMER SOC EXP BIOL
DOI: 10.1096/fj.99-0934com
关键词
angiogenesis; breast cancer; ECM1; endothelial cells
资金
- NCI NIH HHS [R29 CA71545] Funding Source: Medline
Tumor growth and metastasis are critically dependent on the formation of new blood vessels. The present study found that extracelluIar matrix protein 1 (ECM1), a newly described secretory glycoprotein, promotes angiogenesis. This was initially suggested by itt situ hybridization studies of mouse embryos indicating that the ECM1 message was associated with blood vessels and its expression pattern was similar to that of flk-1, a recognized marker for endothelium. More direct evidence for the role of ECM1 in angiogenesis was provided by the fact that highly purified recombinant ECM1 stimulated the proliferation of cultured endothelial cells and promoted blood vessel formation in the chorioallantoic membrane of chicken embryos. Immunohistochemical staining with specific antibodies indicated that ECM1 was expressed by the human breast cancer cell lines MDA-435 and LCC15, both of which are highly tumorigenic. In addition, staining of tissue sections from patients with breast cancer revealed that ECM1 was present in a significant proportion of primary and secondary tumors. Collectively, the results of this study suggest that ECM1 possesses angiogenic properties that may promote tumor progression.
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