Abstract
We investigated the effects of serum-free conditioned medium (SFCM) of colon cancer cells on human umbilical vein endothelial cells (HUVECs). SFCM of highly liver metastatic cell line (LM-HS) strongly enhanced proliferation, migration and tube formation of HUVECs. Moreover, it was suggested that a main angiogenic factor derived from LM-H5 may be VEGF based on HPLC, SDS-PAGE analysis and neutralizing experiment using anti-growth factor antibodies. These findings suggest that angiogenesis is related to the processes of metastasis of colon cancer, and that VEGF synthesized by colon cancer cells acts as a key factor inducing angiogenesis.
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