Donor cell localization in the lung of the P 21 rats.

<p>(A): Fluorescent microscopic observation of the PKH26 labeled human UCB-derived MSCs (donor cells, <i>red</i>) localized in the lungs of the P 21 newborn rats and the nuclei labeled with DAPI (<i>blue</i>) (Scale bar; 25 µm). (B): Number of PKH26 positive cells in the lung per high power field. NC, Normoxia control group; HC, hyperoxia control group; HT3, hyperoxia with stem cell transplantation group at P3; HT10, hyperoxia with stem cell treatment group at P10; HT3+10, hyperoxia with stem cell treatment group at P3 and P10. Data; mean±SEM. <sup>† </sup><i>P</i><0.05 compared to HT3.</p>