Representative immunoblots (top) and densitometric quantification (bottom) demonstrating renal protein expression of phosphorylated Akt, phosphorylated eNOS, VEGF, HIF-1α, and angiopoietin-1 in normal, kidneys with renal artery stenosis (RAS), and RAS treated with autologous endothelial progenitor cells (RAS+EPC). Replenishment of EPC in RAS augmented the expression of vascular growth factors in the stenotic kidney, suggesting a pro-angiogenic stimulus. *p<0.05 vs. Normal. †p<0.05 vs. RAS, # p=0.079 vs. Normal.