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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Nat+Commun
2016 ; 7
(ä): 12564
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Mechanosensing by the ?6-integrin confers an invasive fibroblast phenotype and
mediates lung fibrosis
#MMPMID27535718
Chen H
; Qu J
; Huang X
; Kurundkar A
; Zhu L
; Yang N
; Venado A
; Ding Q
; Liu G
; Antony VB
; Thannickal VJ
; Zhou Y
Nat Commun
2016[Aug]; 7
(ä): 12564
PMID27535718
show ga
Matrix stiffening is a prominent feature of pulmonary fibrosis. In this study, we
demonstrate that matrix stiffness regulates the ability of fibrotic lung
myofibroblasts to invade the basement membrane (BM). We identify ?6-integrin as a
mechanosensing integrin subunit that mediates matrix stiffness-regulated
myofibroblast invasion. Increasing ?6-expression, specifically the B isoform
(?6B), couples ?1-integrin to mediate MMP-2-dependent pericellular proteolysis of
BM collagen IV, leading to myofibroblast invasion. Human idiopathic pulmonary
fibrosis lung myofibroblasts express high levels of ?6-integrin in vitro and in
vivo. Genetic ablation of ?6 in collagen-expressing mesenchymal cells or
pharmacological blockade of matrix stiffness-regulated ?6-expression protects
mice against bleomycin injury-induced experimental lung fibrosis. These findings
suggest that ?6-integrin is a matrix stiffness-regulated mechanosensitive
molecule which confers an invasive fibroblast phenotype and mediates experimental
lung fibrosis. Targeting this mechanosensing ?6(?1)-integrin offers a novel
anti-fibrotic strategy against lung fibrosis.