The analysis of 1170 AD brains show that CHID1 expression levels were correlated with IBA1 (r = 0.2013, p < 0.0001), CD31 (r= −0.09, p = 0.0019), CALB1 (r = 0.1249, p < 0.0001), and NRGN (r = 0.1544, p < 0.0001) (Figure 5A). The gene discussed is PECAM1; the disease is Alzheimer disease.