The level of monocyte chemotactic protein-1 (MCP-1), IL-16, TNF-α, PDGF-BB, SCF, SDF-1a, and vascular endothelial-derived growth factor (VEGF) was much lower in JE mild or severe patients than in healthy people and there was no significant difference between mild and severe sufferers. The gene discussed is KITLG; the disease is Japanese encephalitis.