Figure 4. Effects of Mesenchymal Stem Cells (MSCs) Alone and Transfected With Vascular Endothelial Growth Factor (VEGF) on the Levels of Transforming Growth Factor β1 (TGF-β1), E-Cadherin, Nitric Oxide (NO), and hydroxypyrrolidine (OH-Pyrroline) in Kidney Tissue in Rats With Unilateral Ureteral Obstruction (UUO)