TNF and acute respiratory distress syndrome: Compared with the NS group, the expression of miR-29a-3p in the plasma (Fig. 1B) and lung tissue of the ALI mice was significantly down-regulated (Fig. 1C-D), and the expression of miR-29a-3p in the plasma of ALI mice were negatively correlated with the TNF-α plasma levels (Supplementary Fig. 1C).