To further explore the effect of MTOR on migration during mucous cell metaplasia independently of cellular injury in fully differentiated airway epithelial cells, we utilized BrdU labeling in hAEC under ALI conditions treated with vehicle control, rapamycin, IL-13, or concurrent IL-13 + rapamycin for 7 days (Figure 7A). The gene discussed is MTOR; the disease is acute respiratory distress syndrome.