Plasma levels of the chemokines CCL26/eotaxin-3, CCL4/macrophage inflammatory protein- (MIP-) 1β, CCL11/eotaxin, CCL2/MCP-1, and CCL13/MCP-4 were statistically elevated above control levels in HD, with the first three increasing linearly with disease progression [41]. This evidence concerns the gene CCL2 and Huntington disease.