CFTR and pulmonary fibrosis: To further determine the changes of TGF-βR, WNT core glycosylation levels, and GA on the above receptor proteins and their CF modification levels in bleomycin-induced lung interstitial fibrosis, we applied an immunofluorescence staining assay to detect changes in CF modification of key receptor proteins in pathways related to bleomycin-induced pulmonary fibrosis.