RESUMO
In adults, marked angiogenesis takes place only during the female reproductive cycles, during wound healing, and accompanying some disease processes, such as tumor development. Vascular endothelial growth factor (VEGF) is a secreted, endothelial cell-specific growth factor, which is induced by tissue hypoxia and is angiogenic in vivo. We measured serum VEGF (S-VEGF) concentrations by ELISA in patients with a variety of types of cancer, as well as in healthy volunteers, and in patients with diabetes or rheumatoid arthritis. Elevated S-VEGF concentrations were found in patients with locoregional (n = 39; median, 158 pg/ml; range, 8-664 pg/ml) or disseminated (n = 58; median, 214 pg/ml; range, 17-1711 pg/ml) cancer in comparison to individuals without cancer (n = 113; median, 17 pg/ml; range, 1-177 pg/ml; P < 0.0001 for both comparisons). Values higher than 200 pg/ml were observed in 74% of patients with untreated metastatic cancer, and high serum levels were measured regardless of the histological type of cancer. S-VEGF levels were found to be higher in untreated patients with disseminated cancer than in those with local cancer (P = 0.006), and patients undergoing cancer therapy had lower values than those without cancer therapy (P = 0.03). The results indicate that both patients with locoregional cancer and patients with disseminated cancer may have elevated S-VEGF levels, regardless of the histological type of cancer, and that S-VEGF is often elevated in cancer with distant metastases.