As showed in Table 2, the comparison of cell adhesion molecules levels in plasma between MDD patients and healthy controls demonstrated statistically significant (P < 0.05) for carcinoembryonic antigen-related cell adhesion molecules (CEACAM-1) and neural cell adhesion molecules (NrCAM), but not for other CAMs (P > 0.05). This evidence concerns the gene NRCAM and major depressive disorder.