Abstract
To investigate whether the efficacy of a single angiogenic therapy (sustained delivery of basic fibroblast growth factor [bFGF] or administration of granulocyte colony-stimulating factor [G-CSF]) can be enhanced further by combining the therapies. One day after surgical induction of hind-limb ischemia, groups of 6 mice were randomized to receive either no treatment, sustained delivery (SD) of bFGF, endothelial progenitor cell (EPC) mobilization with G-CSF administration, or a combination of bFGF SD + G-CSF administration. G-CSF administration increased significantly (p < 0.05) the number of EPC lineages (CD34 + /AC133 + cells) in both peripheral blood and bone marrow compared to no G-CSF administration. The bFGF SD and G-CSF administration individually increased the capillary and arteriole densities significantly versus no treatment (capillary density: 659 +/- 48/mm2 and 385 +/- 59/mm2, respectively, versus 280 +/- 28/mm2; p < 0.05; arteriole density: 34 +/- 9/mm2 and 41 +/- 6/mm2, respectively, versus 15 +/- 2/mm2; p<0.05). Importantly, bFGF SD + G-CSF further increased the capillary and arteriole densities compared to either strategy alone (capillary density: 786 +/- 40/mm2 versus 659 +/- 48/mm2 and 385 +/- 59/mm2, respective...Continue Reading
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