Fig. 9

Expression of surfactant protein (SP)-A, SP-C, and SP-D was evaluated by Western blotting at 1, 3, 7, 14, and 28 days after treatment. Protein expression data are presented as the mean ± SD. **P < 0.01, ***P < 0.001, vs. at 1 day after human amnion-derived mesenchymal stem cell (hAMSC) treatment; ^#P < 0.05, ^##P < 0.01, ^###P < 0.001, vs. model group; ^&P < 0.05, ^&&P < 0.01, ^&&&P < 0.001, vs. phosphate-buffered saline (PBS) group. GAPDH, glyceraldehyde-3-phosphate dehydrogenase