Immunofluorescent staining of von Willebrand factor (vWF)-positive cells in peri-tubular and interstitial areas of kidney. On day 3 after IR injury, notably higher number of vWF+ cells (yellow arrows) in control group than in IR and IR + ADMSC groups (400 ×), and significantly higher number in IR + ADMSC group than in IR group. By day 14 after IR procedure, markedly higher number of vWF+ cells (yellow arrows) in control group and IR + ADMSC groups than in IR group (400 ×), but no significant difference between control group and IR + ADMSC group. Merged image from double staining with Dil + vWF shown in "IR + ADMSC". Identification of numerous doubly-stained cells in peri-tubular and interstitial areas (white arrows). Scale bars at right lower corners represent 20 μm; 1) normal vs. day 3, *p < 0.03 between the indicated groups; 2) normal vs. day 14, *p < 0.03 between the indicated groups (n = 8 for each group). Symbols (*, †, ‡, §, ¶) indicate significance (at 0.05 level) (by Bonferroni multiple comparison post hoc test).