Protein expression of cytokines and matrix components in lung tissue assessed by Western blotting.

<p>Collagen Col1A1 (<b>A</b>), TGFβ (<b>B</b>), IL-1β (<b>C</b>), IL-2 (<b>D</b>), IL-6 (<b>E</b>) and IL-10 (<b>F</b>) protein levels in whole lung tissue lysates obtained from C57BL/6 mice 21 days after endotracheal injection of sterile saline (saline) or bleomycin (bleo), the latter also followed by intravenous infusion of hUC-MSC (bleo+hUC-MSC) or sterile saline (bleo+saline). Results are representative of three independent experiments. Densitometric analysis of protein bands is normalized to actin and expressed as mean ± SD (n = 5 per group). ** = P < 0.01, *** = P < 0.001 compared to bleomycin treated mice.