The ligand for BMP2 is TGF‐β,89 and introduction of BMP2‐transduced endothelial progenitor cells into a model of LPS‐induced ARDS in rats improves lung function, highlighting the central roles of these signaling pathways, and EC, in the pathogenesis of ARDS.90 The gene discussed is TGFB1; the disease is acute respiratory distress syndrome.