Histological examination of AAAs from surviving 28-day Ang II–infused animals revealed that AAA maximal diameter did not differ between groups (Figure 7B), although the average wall thickness was significantly decreased in Timp3−/−/Apoe−/− mice compared with Timp3+/+/Apoe−/− animals (Figure 7C and 7D). Here, APOE is linked to triple-A syndrome.