Abstract：
:P120-catenin (P120) was known to function in adhesion between cells and signal transduction in many types of cells. In this study, we investigated the expression and role of P120 in pulmonary fibrosis and transforming growth factor beta (TGF-β) mediated lung fibroblast-to-myofibroblast differentiation (fibroblast differentiation). Our data indicated that P120 expression increased in lung fibrotic foci and primary lung fibroblasts isolated from bleomycin- (BLM) challenged mice, compared to controls. In vitro, TGF-β induced P120 expression in human lung fibroblasts, and siRNA-mediated SMAD3 depletion inhibited TGF-β stimulated P120 expression. Blocking nuclear factor kappa-light-chain-enhancer of activated B cells (NF-kB) pathway through chemical inhibitor or knockdown of NF-kB p65 subunit also suppressed TGF-β induced P120 expression in human lung fibroblast. Knockdown of P120 expression inhibited TGF-β induced human lung fibroblast differentiation, as well as suppressed the activation of SMAD and ERK signaling pathways. Administration of lentivirus coding mouse P120 sh-RNA into mouse lung tissue dramatically attenuated the expression of P120 in lung tissue and lung fibroblast, suppressed BLM induced increase of TGF-β, alpha smooth muscle actin (α-SMA) and fibronectin (FN) expression, and decreased the deposition of collagen and pulmonary fibrosis. Collectively, these results suggested that P120 involved in lung fibroblast differentiation and pulmonary fibrosis, and inhibition of P120 expression decreased pulmonary fibrosis in BLM challenged mice. Thus, attenuation of P120 expression might be a potential therapeutic strategy for human lung fibrosis.
journal_name
Life Scijournal_title
Life sciencesauthors
Zhang Y,Jiao H,Wu Y,Sun Xdoi
10.1016/j.lfs.2019.05.052subject
Has Abstractpub_date
2019-08-01 00:00:00pages
35-44eissn
0024-3205issn
1879-0631pii
S0024-3205(19)30408-4journal_volume
230pub_type
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