CCL17 and Alzheimer disease: Statistical analysis showed significantly higher concentrations of IL-4 (p = 0.0357), IL-13 (p = 0.0050), IL-6 (p = 0.0183), CCL17 (p = 0.0447), CXCL13 (p = 0.0008), and MMP-7 (p = 0.0041) in AD samples (Table 1 and Figure 3).