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- W2006938922 abstract "Pulmonary vascular remodeling, produced by cell hypertrophy and extracellular matrix protein synthesis in response to hemodynamic stress, regresses after reduction of blood pressure, possibly by proteolysis of structural proteins. To test this postulate, we assessed the breakdown of extracellular matrix proteins and expression of collagenase and elastase in pulmonary arteries of rats exposed to hypoxia (10% O2 for 10 d) followed by normoxia. During hypoxia, contents of collagen and elastin increased in pulmonary arteries and latent rat interstitial collagenase was expressed without increased collagenolytic activity or mRNA levels. At 3 days after normoxia, collagen and elastin contents decreased coincident with the new appearance of activated collagenase and transient increases in collagenolytic and elastolytic activities. The amount of immunoreactive collagenase, localized predominately in connective tissue-type mast cells, was increased in the adventitia and media of hypertensive vessels. We conclude that mast cells containing latent collagenase are recruited into the outer walls of pulmonary arteries during remodeling. It is possible that mast cell-derived collagenase contributes to collagen breakdown in pulmonary arteries during early recovery from hypoxia and plays a role in restoration of vascular architecture." @default.
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- W2006938922 date "1998-04-01" @default.
- W2006938922 modified "2023-10-15" @default.
- W2006938922 title "Mast Cell Collagenase Correlates with Regression of Pulmonary Vascular Remodeling in the Rat" @default.
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- W2006938922 doi "https://doi.org/10.1165/ajrcmb.18.4.2536" @default.
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