PMID: 11922909Mar 30, 2002Paper

AAV-mediated VEGF gene transfer into skeletal muscle stimulates angiogenesis and improves blood flow in a rat hindlimb ischemia model

Cardiovascular Research
Masahisa ShimpoKazuyuki Shimada

Abstract

Clinical trials on therapeutic angiogenesis using vascular endothelial growth factor (VEGF) are ongoing, however the benefits of these therapies are still controversial. To establish a more efficient gene transfer method for ischemic diseases, we investigated the therapeutic potential of adeno-associated virus (AAV)-mediated VEGF gene transfer. We produced VEGF(165)-expressing AAV vectors (AAV-VEGF). HEK-293 cells were transduced with AAV-VEGF in vitro and VEGF expression and secretion were examined. We used a rat ischemic hindlimb model and AAV-VEGF was administered intramuscularly into the ischemic limb. Gene expression was evaluated by RT-PCR and ELISA. Six weeks after gene transfer, we measured the blood flow of limb vessels and the skin temperature of limbs. Histochemical examination was performed to illustrate capillary growth. Western blotting and ELISA revealed VEGF protein expression and secretion from AAV-VEGF-transduced HEK-293 cells. VEGF mRNA and protein expression was consistently observed in the injected muscle at least 10 weeks after the injection, while no VEGF mRNA could be detected at remote organs. The mean blood flow in AAV-VEGF-transduced ischemic limbs was significantly higher than in AAV-LacZ-transduced ...Continue Reading

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