MMP9 and coronary artery disorder: Li et al. examined the clinical significance of MMP-9 secreted by cultured monocyte-derived macrophages (HMDM) from patients with coronary heart disease (CHD) in vitro and evaluated the intervenient function of puerarin on them and revealed that the levels of MMP-9 secreted in vitro by HMDM from CHD patients could be used as indexes for evaluating patient's condition of ACS.