Abstract：
:Src kinase is known to regulate fibroblast migration. However, the contribution of integrin and Src kinase interaction to lung fibrosis has not been mechanistically investigated. Our data demonstrate that integrin alpha v (αV) recruited Src kinase and that leads to subsequent Src activation in fibroblasts plated on fibrotic matrix, osteopontin. Src interaction with integrin αV is required for integrin αV-mediated Src activation, and the subsequent fibroblast migration. The study identified that β5 and β3 are the major integrins for this effect on osteopontin. In contrast, integrins β1, β6, and β8 did not have a critical role in this phenomenon. Importantly, Src inhibitor significantly reduces fibroblast migration stimulated by PDGF-BB and reduced in vivo lung fibrosis in mice. Src inhibitor reduced Src activation and blocked the signaling transduction by integrin αV, inhibited migration signaling pathways and reduced extracellular matrix protein production, and blocked myofibroblast differentiation in vivo in mouse lung tissues. The present study supports that the interaction of Src Kinase and integrins plays a critical role in the development of lung fibrosis and the signaling involved may present a novel opportunity to target deadly fibrotic diseases.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Lu YY,Zhao XK,Yu L,Qi F,Zhai B,Gao CQ,Ding Qdoi
10.1038/srep46357subject
Has Abstractpub_date
2017-04-11 00:00:00pages
46357issn
2045-2322pii
srep46357journal_volume
7pub_type
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