PILRA and Alzheimer disease: CLEC4G exhibited a significant negative correlation with NPC1 (R = −0.47, p < 0.0001; R = −0.44, p < 0.0001), PILRA (R = −0.044, p < 0.0001; R = −0.42, p < 0.0001), and TYROBP (R = −0.32, p < 0.0001; R = −0.23, p < 0.0001) in both NC and AD (Figure 5A–C).