کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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2051002 | 1074187 | 2007 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: PAI-1 deficiency reduces liver fibrosis after bile duct ligation in mice through activation of tPA PAI-1 deficiency reduces liver fibrosis after bile duct ligation in mice through activation of tPA](/preview/png/2051002.png)
Plasminogen activator inhibitor-1 (PAI-1) increases injury in several liver, lung and kidney disease models. The objective of this investigation was to assess the effect of PAI-1 deficiency on cholestatic liver fibrosis and determine PAI-1 influenced fibrogenic mechanisms. We found that PAI-1−/− mice had less fibrosis than wild type (WT) mice after bile duct ligation. This change correlated with increased tissue-type plasminogen activator (tPA) activity, and increased matrix metalloproteinase-9 (MMP-9), but not MMP-2 activity. Furthermore, there was increased activation of the tPA substrate hepatocyte growth factor (HGF), a known anti-fibrogenic protein. In contrast, there was no difference in hepatic urokinase plasminogen activator (uPA) or plasmin activities between PAI-1−/− and WT mice. There was also no difference in the level of transforming growth factor beta 1 (TGF-β1), stellate cell activation or collagen production between WT and PAI-1−/− animals. In conclusion, PAI-1 deficiency reduces hepatic fibrosis after bile duct obstruction mainly through the activation of tPA and HGF.
Journal: FEBS Letters - Volume 581, Issue 16, 26 June 2007, Pages 3098–3104