Abstract:
:The hst-1 gene product, one of the fibroblast growth factor family proteins, has transforming and angiogenic activities. The BALB/c 3T3 cell line was transfected with an expression vector harboring human hst-1 cDNA and the malignant properties of two stably transfected clones, TC-1 and TC-2, were examined. The stimulating activity of TC-1-conditioned medium for endothelial cell DNA synthesis was approximately four times stronger than that of TC-2-conditioned medium and correlated with hst-1 mRNA expression levels. Other than endothelial cell growth stimulation, these two clones had similar typical in vitro transformed properties, with identical doubling times and morphological changes. When nude mice were injected s.c. with these clones, TC-1 cells revealed faster tumor formation and growth, compared to TC-2 cells which had less potential to promote endothelial cell growth. Furthermore, the life span of mice injected i.v. with TC-1 cells was shorter than those with TC-2 cells, resulting from progressive tumor growth in the lungs. This advanced malignant in vivo behavior of TC-1 cells may be mediated by the high angiogenic potential of TC-1 cells secreting larger amounts of HST-1 compared to TC-2 cells, suggesting that angiogenesis contributes to malignant progression of tumors.
journal_name
Angiogenesisjournal_title
Angiogenesisauthors
Aonuma M,Murakami K,Hirotani K,Horiuchi T,Sakamoto H,Terada M,Tanaka NGdoi
10.1023/a:1009288405970subject
Has Abstractpub_date
1998-01-01 00:00:00pages
143-52issue
2eissn
0969-6970issn
1573-7209pii
176942journal_volume
2pub_type
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