MMP2 and triple-A syndrome: Following AAA induction, either MMP2 or MMP9 expression was readily seen on day 7 (MMP2, 0.7 ± 0.1 × 105 μm2 and MMP9, 0.8 ± 0.2 × 105 μm2, respectively) and reached maximal on day 14 (MMP2, 1.6 ± 0.3 × 105 μm2 and MMP9, 1.9 ± 0.2 × 105 μm2, respectively) as compared to nonaneurysmal aorta (Figures 7(b) and 7(c)).