Figure 3. Validation of the selected candidates in plasma from young and old mice. Plasma concentrations of (A) ANTXR2, (B) CDH-13, (C) CD163, (D) COMP, (E) DKK3, (F) periostin and (G) secretogranin-1. Error bars represent ± SEM. *** P < 0.001, ** P < 0.01, * P < 0.05; NS, not significant.