Its results showed that unstable CAD patients had a higher level of plasma MPO level (71.2 ± 19.6 ng/ml) than both stable CAD patients (34.5 ± 6.8 ng/ml) and control groups (23.0 ± 3.6 ng/ml) (P < 0.001) [46]. The gene discussed is MPO; the disease is coronary artery disorder.