As reported in Table 1, no difference in genotype distribution and allele frequencies of A-2518G MCP-1 SNP among AD patients, MCI subjects and controls (CTR) were observed (AD vs CTR χ2= 0.11, p=0.994; CTR vs MCI χ2= 3.633, p=0.163; AD vs MCI χ2= 3.942, p=0.139). The gene discussed is CCL2; the disease is Alzheimer disease.