论文部分内容阅读
Objective: To study the expression of vascular endothelial growth factor (VEGF) and basic fibroblast growth factor (b-FGF) and their receptors after injection of external VEGF on ischemic heart muscle and to investigate the mechanism of therapeutic myocardial angiogenesis of VEGF. Methods: Standard experimental pigs underwent placement of a left circumflex artery ameroid occluder. Six weeks later, the animals in the experimental group were treated with VEGF (20μg) by direct epicardial injection ( n = 8) and other animals in the control group did not receive any treatment ( n = 8).Four weeks after therapy, the animals were evaluated with regard to mRNA and protein expression of VEGF and b-FGF and their receptors by RT-PCR and Western blotting. Results: The mRNA expression of VEGF and b-FGF and their receptors by RT-PCR expressing as percentage of density ratio to the GAPDH control was increased in experimental group versus control group. The protein expression of VEGF and b-FGF and their receptors by Western blot expressing as percentage of density ratio to the Commassie Blue control was increased in experimental group versus control Group. Conclusion: Exogenous VEGF can induce the expression of endogenous VEGF, b-FGF, and their receptors; b-FGF may play a role in the angiogenesis of VEGF.