TGFB1 and acute respiratory distress syndrome: Meanwhile, the proportion of Th17 significantly decreased in the LPS + mBM-MSC and LPS + mBM-MSC-NC groups compared to that in the ARDS group (p < 0.05) but significantly increased in the LPS + mBM-MSC-TGFβ1 group compared to that in the LPS + mBM-MSC-NC group (p < 0.05) but was still lower than that in the ARDS group (p < 0.05, Fig. 4b).