Another study has demonstrated that basal and lipopolysaccharide- (LPS-) induced levels of the chemokines CCL2/MCP-1, CCL3/MIP-1α, and CXCL8/IL-8 and basal levels of CCL5/RANTES were significantly higher in PD patients than in controls. The gene discussed is CXCL8; the disease is Parkinson disease.