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Intramyocardial injection of vascular endothelial growth factor-A165 plasmid followed by granulocyte-colony stimulating factor to induce angiogenesis in patients with severe chronic ischaemic heart disease

Rasmus Sejersten Ripa, Yongzhong Wang, Erik Jørgensen, Hans Erik Johnsen, Birger Hesse, Jens Kastrup
European Heart Journal 2006, 27 (15): 1785-92
16825290

AIMS: To assess the safety and effects of combined treatment with vascular endothelial growth factor-A(165) plasmid (VEGF-A(165)) and granulocyte- colony stimulating factor (G-CSF) mobilization of bone marrow stem cells in patients with severe chronic ischaemic heart disease (IHD).

METHODS AND RESULTS: Sixteen patients with severe chronic IHD were treated with intramyocardial injections of VEGF-A(165) plasmid followed 1 week later by G-CSF (10 microg/kg/day for 6 days). Two control groups included (i) sixteen patients treated with intramyocardial injections of VEGF-A(165) plasmid and (ii) sixteen patients treated with intramyocardial injections of placebo. In the G-CSF group, circulating CD34+ stem cells increased almost 10-fold compared with the control groups (P<0.0001). After 3 months, there was no improvement in myocardial perfusion at single photon emission computerized tomography in the VEGF-A(165) and G-CSF treated group, and clinical symptoms were unchanged. There were no side effects to the gene and G-CSF therapy.

CONCLUSION: Intramyocardial VEGF-A(165) gene transfer followed by bone marrow stem cell mobilization with G-CSF seemed safe. However, a significant increase in circulating stem cells did not lead to improved myocardial perfusion or clinical effects suggesting a neutral effect of the treatment. To improve homing of stem cells, higher doses of VEGF-A(165) and/or use of SDF-1 transfer might be considered.

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