POSTN and coronary artery disorder: In contrast, in the high POSTN expression group, POSTN was negatively correlated with resting NK cells, indicating that high POSTN expression may be linked to the activation of inflammatory signaling pathways (such as NF-κB), thereby inhibiting the resting state of NK cells or altering their activity, which reflects differences in the immune microenvironment during acute or high-inflammatory states of CAD.