DDR2 and pulmonary fibrosis: Zhao et al. [56] noted that idiopathic pulmonary fibrosis (IPF) is a lethal human disease with limited treatment options, but showed in mouse studies that even late-stage treatment with either a specific DDR2 siRNA against DDR2 or dasatinib (7); a potent DDR2 inhibitor (IC50 5.4 nM) [56] were effective.