Abstract:
:We have previously reported that rodent tumor cell lines secrete a potent vascular permeability factor with a molecular weight of 34,000-42,000 (Senger et al. Tumor cells secrete a vascular permeability factor that promotes accumulation of ascites fluid. Science (Wash. DC), 219: 983-985, 1983). This tumor-secreted vascular permeability factor (VPF) causes a rapid and completely reversible increase in microvascular permeability in the species (guinea pig or rat) from which the tumors were derived without causing mast cell degranulation or endothelial cell damage or exciting an inflammatory cell infiltrate. This VPF may be responsible, at least in part, for the increased permeability which is commonly displayed by solid and ascites tumor vessels. We have now examined 7 human tumor cell lines and have determined that 5 of them also secrete this same VPF. Antibody raised to guinea pig line 10 VPF neutralized more than 90% of the vascular permeability-increasing activity secreted by these 5 human tumor lines. Furthermore, VPFs from both guinea pig and human tumor sources bound to and were eluted similarly from immobilized heparin and comigrated identically on sodium dodecyl sulfate-polyacrylamide gels. Finally, 2 tumorigenic (in nude mice) human cell lines were found to secrete at least 14-fold more VPF than their directly matched, nontumorigenic counterparts, suggesting that elevated expression of this permeability factor may correlate with neoplastic transformation. These data suggest that a broad spectrum of tumor cells from several species, including humans, secretes a highly conserved molecule that enhances local vascular permeability and that this function may be important for tumor growth.
journal_name
Cancer Resjournal_title
Cancer researchauthors
Senger DR,Perruzzi CA,Feder J,Dvorak HFsubject
Has Abstractpub_date
1986-11-01 00:00:00pages
5629-32issue
11eissn
0008-5472issn
1538-7445journal_volume
46pub_type
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