Reduced beta3-endonexin levels are associated with enhanced urokinase-type plasminogen activator receptor expression in ApoE-/- mice

Thrombosis Research
Felicitas BestaM Gawaz

Abstract

Proteolysis of extracellular matrix components is required for cell migration occurring in atherosclerotic lesion formation. In the present study, gene expression of the urokinase plasmingen activator receptor (uPAR) and underlying mechanisms were analyzed during the development of atherosclerosis in the aorta of apolipoprotein E-deficient mice (apoE(-/-)). A significant increase of uPAR expression was detected in the atherosclerotic tissue with advancing plaque-dimension. As uPAR gene transcription involves the transcription factor nuclear factor-kappaB (NF-kappaB), we analyzed nuclear NF-kappaB activity in vascular tissue of apoE-deficient mice. Congruent to uPAR, we could detect an increase in NF-kappaB activity, which underlines the chronic inflammatory component of the disease. Recently we reported that beta(3)-endonexin, a protein that modulates beta(3)-integrins, regulates uPAR expression through direct interaction with subunits of the NF-kappaB-complex. Herein we could show that beta(3)-endonexin protein is expressed in aortic tissue of mice. Moreover, in contrast to uPAR or NF-kappaB, the expression of beta(3)-endonexin was reduced in extracts of advanced atherosclerotic aortic tissue. The cytoplasmic protein beta(3)-e...Continue Reading

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Citations

Jan 7, 2014·Antioxidants & Redox Signaling·Damir KračunAgnes Görlach
Jun 13, 2021·Biochemical and Biophysical Research Communications·Zhongyuan CaoYan-Qing Ma

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