Hepatocyte growth factor is a novel member of the endothelium-specific growth factors: additive stimulatory effect of hepatocyte growth factor with basic fibroblast growth factor but not with vascular endothelial growth factor
Abstract
To seek an endothelium-specific growth factor by examining the mitogenic effects of hepatocyte growth factor (HGF) on endothelial cells and on vascular smooth muscle cells (VSMC). Rat and human endothelial cells and VSMC were employed. DNA, RNA and protein synthesis were measured by using [3H]-thymidine, uridine and leucine. Coculture of endothelial cells with VSMC was also performed to study the role of endothelial cells. Coculture of endothelial cells with VSMC resulted in a significant decrease in DNA synthesis of VSMC. HGF, as well as basic fibroblast growth factor (bFGF), stimulated DNA, RNA and protein synthesis by endothelial cells in a dose-dependent manner. Interestingly, co-incubation of endothelial cells with HGF and bFGF resulted in an additive stimulation of DNA synthesis. Similarly, HGF and interleukin-1 alpha and -6 stimulated DNA synthesis by coronary endothelial cells, whereas interleukin-1 beta and transforming growth factor-beta (TGF-beta) did not. However, HGF showed markedly different actions from bFGF on VSMC growth. bFGF, TGF-beta, interleukin-1 alpha, -1 beta and -6 stimulated DNA synthesis in VSMC significantly, whereas HGF did not. Finally, we examined the mitogenic effect of HGF on human aortic endoth...Continue Reading
Citations
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