Transcriptomic analyses have identified different pivotal differentially expressed genes shared between MI and depression (e.g., cluster of differentiation 24, cystatin A, exostosin like glycosyltransferase 3, ribosomal protein S7, solute carrier family 25 member 5, zinc finger matrin-type 3, Toll-like receptor 2, HP, intercellular adhesion molecule 1, lipocalin-2, lactotransferrin, versican, S100A9, and NK-κB inhibitor alpha), all of which are associated with inflammation [153,154]. This evidence concerns the gene S100A9 and major depressive disorder.