碱性成纤维细胞生长因子上调原代培养鼠星形胶质细胞中血管内皮生长因子的表达(英文)

目的:观察碱性成纤维细胞生长因子(bFGF)对鼠星形胶质细胞中血管内皮生长因子(VEGF)表达的影响。方法:用半定量聚合酶链反应(PCR)法和免疫组织化学法分别考察bFGF对VEGF信使RNA(mRNA)水平和蛋白质水平的影响。对不同剂量bFGF(1,10,100 ug·L~(-1))和不同孵育时间(3,6,12,24 h)的作用均进行了分析。 结果:bFGF可以剂量依赖性升高VEGF的mRNA水平。bFGF 10ug·L~(-1)在孵育3 h后即可上调VEGF mRNA水平,孵育24 h后细胞内VEGF mRNA水平显著高于对照组。免疫细胞化学分析结果表明bFGF也能升高细胞的VEGF蛋白质水平。结论:碱性成纤维细胞生长因子可以上调鼠星形胶质细胞中血管内皮生长因子的表达。

Basic fibroblast growth factor up-regulates the expression of vascular endothelial growth factor in primary cultured rat astrocytes

AIM: To examine the effect of recombinant human basic fibroblast growth factor (bFGF) on the expression of vascular endothelial growth factor (VEGF) in primary cultured rat astrocytes. METHODS: Semiquantification PCR (SQ-PCR) and immunocytochemistry were used to investigate the effect of bFGF on VEGF mRNA level and protein level, respectively. RESULTS: Treatment with bFGF dose-dependently increased the VEGF mRNA level in astrocytes. The up-regulation of VEGF mRNA induced by bFGF (10 micrograms/L) was detected as short as 3-h treatment. The increase of VEGF mRNA level reached the maximum after 24-h treatment with bFGF. The immunocytochemical staining showed that the VEGF protein level in astrocytes also increased after the cells were incubated with bFGF. CONCLUSION: bFGF induced a marked time- and concentration-dependent increase in VEGF expression in primary cultured astrocytes, suggesting that the effect of bFGF on angiogenesis in brain may act partly by up-regulating VEGF expression in astrocytes.