PBX1 and hydrops fetalis: In contrast, PBX1 overexpression in H2O2-treated and -untreated HF-MSCs significantly decreased the percentage of ROS-positive cells from 8.95 to 4.91% (p < 0.05; Figures 5K,L), and from 23.10 to 14.07% (p < 0.05; Figures 5K,L), that of apoptotic positive cells from 8.21 to 6.03% (p < 0.05; Figures 5C,D), and from 14.06 to 10.04% (p < 0.05; Figures 5C,D), and that of SA-β-gal-positive cells from 16.61 to 17.76% (p < 0.05; Figures 5A,B) and from 37.16 to 25.80% (p < 0.05; Figures 5A,B).