The investigators hypothesized that the molecular aging of matrix proteins may participate in the formation of aortic aneurysm. Indeed, it is well known that the aneurysm wall is subjected to important structural changes including variations in extracellular matrix composition. However, few studies have looked for a link between the molecular aging of matrix proteins and the formation of aneurysm. So, the aim of this study is to understand the role of protein molecular aging in this context.