MPO and Sepsis: As compared with healthy volunteers, patients with sepsis at enrollment had an increased expression of mRNAs of myeloperoxidase (MPO) (66-fold), the antioxidant enzyme peroxiredoxin 3 (2.6-fold), the mitochondrial enzyme superoxide dismutase 2 (2.2-fold), and the following oxidative stress response genes: Forkhead box protein M1 (FOXM1) (21-fold), selenoprotein S (16-fold), and glutaredoxin 2 (3.4-fold).