On the other hand, among other decreased proteins in postsurgical sera compared with those in presurgical sera, which we focused on and confirmed the decrease by Western blot analyses, we found that the decreased levels of kallistatin in both AAA and TAA patients’ postsurgical sera and α-2-macroglobulin in TAA patients’ postsurgical sera are restored to levels similar to those in normal control sera. This evidence concerns the gene SERPINA4 and triple-A syndrome.