Abstract
Fibroblast growth factor-1 (FGF-1) is a potent angiogenic factor; its structure lacks a signal peptide for secretion. We previously reported that the overexpression of a secreted version of FGF-1 (sp-FGF-1) in microvascular endothelial cells (ECs) enhances cell migration [Partridge et al. J Cell Biochem 2000; 78(3): 487]. In the current study, we have examined the angiogenic effects of sp-FGF-1 in chicken chorioallantoic membranes (CAMs). Two methods of examining the effects of sp-FGF-1 in CAMs were used: cell-mediated transfection via bovine ECs and direct gene transfection. In the cell-mediated gene transfection, those eggs that were implanted with a gelatin sponge seeded with ECs stably transfected to over-express sp-FGF-1 protein showed a significant increase in angiogenesis inside the sponge when compared to eggs treated with vector control-transfected ECs. In the direct gene transfer, eggs received sp-FGF-1 showed a significant increase in vascularization when compared to eggs received vector alone plasmids. These CAM models are useful both for studying molecular mechanisms of angiogenesis and for developing better gene therapy strategies.
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Forough, R., Wang, X., Martinez-Lemus, L.A. et al. Cell-based and direct gene transfer-induced angiogenesis via a secreted chimeric fibroblast growth factor-1 (sp-FGF-1) in the chick chorioallantoic membrane (CAM). Angiogenesis 6, 47–54 (2003). https://doi.org/10.1023/A:1025857229064
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DOI: https://doi.org/10.1023/A:1025857229064