Abstract:
:Increased vascular permeability contributes to many diseases, including acute respiratory distress syndrome, cancer and inflammation. Most past work on vascular barrier function has focused on soluble regulators, such as tumour-necrosis factor-α. Here we show that lung vascular permeability is controlled mechanically by changes in extracellular matrix structure. Our studies reveal that pulmonary vascular leakage can be increased by altering extracellular matrix compliance in vitro and by manipulating lysyl oxidase-mediated collagen crosslinking in vivo. Either decreasing or increasing extracellular matrix stiffness relative to normal levels disrupts junctional integrity and increases vascular leakage. Importantly, endotoxin-induced increases of vascular permeability are accompanied by concomitant increases in extracellular matrix rigidity and lysyl oxidase activity, which can be prevented by inhibiting lysyl oxidase activity. The identification of lysyl oxidase and the extracellular matrix as critical regulators of lung vascular leakage might lead to the development of new therapeutic approaches for the treatment of pulmonary oedema and other diseases caused by abnormal vascular permeability.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Mammoto A,Mammoto T,Kanapathipillai M,Wing Yung C,Jiang E,Jiang A,Lofgren K,Gee EP,Ingber DEdoi
10.1038/ncomms2774subject
Has Abstractpub_date
2013-01-01 00:00:00pages
1759issn
2041-1723pii
ncomms2774journal_volume
4pub_type
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