In fact, C. pneumoniae infection induced cytokines, E-selectin, ICAM-1, and VCAM-1 expression in endothelial cells [13], [14]; the patients suffering from coronary artery disease had a higher plasma level of ICAM-1 and E-selectin, which was associated with Chlamydia IgA LPS seropositivity [12]. This evidence concerns the gene VCAM1 and coronary artery disorder.