S100A8 and coronary artery disorder: Patients with CAD (UAP and AMI) had higher serum MRP8/14, compared to controls (p < 0.05). Also, patients with AMI group had significantly higher levels compared with UAP, SAP, and control groups (p < 0.05). UAP group had higher levels than SAP (36.73 ± 5.34 vs. 29.12 ± 4.57 pg/mL, p < 0.05).