Figure 2. Direct transplantation of canine umbilical cord blood-derived mesenchymal stem cells (cUCB-MSCs). A: Ultrasonographic image of the normal kidney. B: Phosphate-buffer solution was bilaterally injected into the kidneys under ultrasonographic guidance for the acute kidney injury (AKI)+PBS group (the yellow arrow indicates the injection needle). C: Cells were bilaterally transplanted into the kidneys for the AKI+MSC group under ultrasonographic guidance (the blue arrow indicates the injection needle).