To construct a repetitive, objective and consecutive system for evaluating the angiogenesis of vascular endothelial growth factor(VEGF) in vivo, a sterile polyvinyl alcohol sponge disc was implanted into the subcutaneous part of rat and five days later pCMV 4 VEGF 165 expressed plasmid and empty vector pCMV 4 were injected into the sponge, respectively. 7 and 11 days after injection, the tissue ingrowth in the implants and expression of VEGF gene in the serum, the tissues in the sponge and the liver were measured by RT polymerase chain reaction (RT PCR) .The pathological section of sponge was stained with hematoxylin and eosin (HE) and immunohistochemistry of Ⅷ factor specific for vascular endothelial cells. The tissue ingrowth in the implants was analysed by image analysis system and statistical analysis was done with Stata Software. The results indicated that the expression of VEGF gene was located at the injection site and promoted the tissue ingrowth in the implants. In brief, the angiogenesis of VEGF was successfully observed using the sponge implant model, which provides lays the theoretical foundation for local gene therapy of ischemic diseases.

Objective To investigate the effect of both thrombus aspiration device Diver CE and tirofiban therapy on patients of acute myocardial infarction (AMI) with coronary thrombotic burden lesion.Methods 32 patients of AMI with thrombotic burden lesion confirmed by coronary angiography were divided into the aspiration catheter and tirofiban group (n=24) and standard percutaneous coronary intervention (PCI) group (n=8). The rate of major adverse cardiovascular events (MACE) in hospital, changes before and after the therapy of two groups were compared.Results MACE incidence in hospital in the patients of the both thrombus aspiration and tirofiban group was obviously lower than that of the standard PCI group ( P<0.05). The thrombolysis in myocadial infarction (TIMI) after therapy in the thrombus aspiration group improved superior to the standard PCI group. All of two groups had no fatal hemorrhagic complications.Conclusion Combination of thrombus aspiration and tirofiban is a safe and effective method to manage the thrombotic burden lesion in AMI patients.