Figure 9: Multilineage differentiation of lung-derived MSCs. Fibroblast differentiation. The presence of fibroblasts in culture was confirmed by staining blue by May-Grunwald. All cultured cells had typical spindle-shaped fibroblast morphology and growth characteristics. Results are presented as mean and SEM. On the ordinate axis – number of fibroblasts (% of total mononuclear cells), on the abscissa - examined groups: mice with intratracheal administration of NaCl 0.9%, mice with intratracheal bleomycin administration, mice with intratracheal bleomycin administration and spiperone-treated.