Levels of MPO in plasma in control group, sepsis group, sepsis+SO2 group, and SO2 group were 51.8 ± 25.5 U/L, 85.1 ± 52.2 U/L, 38.1 ± 9.89 U/L, and 50.3 ± 19.5 U/L, respectively. This evidence concerns the gene MPO and Sepsis.