However, the plasma levels of inflammatory factors such as interleukin 4 (IL‐4), IL‐9, IL‐12p70, keratinocyte chemoattractant (KC), and monocyte chemoattractant protein‐1 (MCP‐1) were decreased in LCA‐treated mice (Figure 8E). This evidence concerns the gene CCL2 and Leber congenital amaurosis.