Moreover, GD can increase the blood levels of MIP-1β, MCP-1, MIG, IP-10, SDF-1α, PDGFbb, βNGF, IL-2ra, IL-4, and IL-17, whereas HD can lead to elevated levels of MIG, IL-2ra, IP-10, and IL-16 levels. This evidence concerns the gene CXCL12 and Huntington disease.