TGFB1 and idiopathic pulmonary fibrosis: Comparison of alveolar septae regions identified that there was a progressive increase in expression of gene sets associated with TGFβ and Wnt signaling from control alveolar septae to distant IPF alveolar septae to IPF alveolar septae adjacent to fibrotic lesions (Figures 7A and 7B) in addition to increased expression of fibrillar collagen genes (Figure 5 and Table S4A).