NEDD4L and idiopathic pulmonary fibrosis: In addition to the morphological and clinical characterization of pulmonary fibrosis and studies of pathogenic processes induced by Nedd4-2 deficiency, we performed proteome analyses to provide an unbiased molecular characterization of IPF-like lung disease and compared alterations found in lungs of conditional Nedd4-2−/− mice to patients with IPF.