Figure 2. Thoracic aorta lumen diameter (A), medial cross-sectional area (B [CSA]), and media-to-lumen ratio (C) in young, middle-age, and old wild-type (WT) and SIRT-1 transgenic overexpressing (SIRTTG) mice. *P<0.05 vs. WT in same age group. †P<0.05 vs. Young. ‡P<0.05 vs. Middle-Age. Data are individual values and means.