The abdominal aortic aneurysm (AAA) is a life-threatening condition associated with aging. Its rupture is a frequent cause of death. Various proteases are involved in the pathogenesis of AAA, by degradation of the vessel wall. The role of cathepsins has not been clarified yet. Thus, the aim of this study was a detailed analysis of cathepsin B, D, K, L, S and their inhibitor cystatin C. For this purpose immunohistochemistry, quantitative real-time RT-PCR, western blot and serum analyses were performed. AAA was compared with healthy aortas, as well as symptomatic and asymtomatic AAAs. A markedly increased activity of various cathepsins and diminished expression of cystatin C within the AAA wall was observed, compared to healthy aorta. Thus, the results suggest an important role of cathepsins in the development and progression of AAA.
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The abdominal aortic aneurysm (AAA) is a life-threatening condition associated with aging. Its rupture is a frequent cause of death. Various proteases are involved in the pathogenesis of AAA, by degradation of the vessel wall. The role of cathepsins has not been clarified yet. Thus, the aim of this study was a detailed analysis of cathepsin B, D, K, L, S and their inhibitor cystatin C. For this purpose immunohistochemistry, quantitative real-time RT-PCR, western blot and serum analyses were perf...
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