IL-7 enhances inflammation in various autoimmune disorders, including rheumatoid arthritis (RA) where it is increased in the synovial fluid (SF) and stimulates T-cells to produce various cytokines including tumor necrosis factor (TNF)-α, interferon (IFN)-γ, and IL-17 [3,4]. The gene discussed is IL17A; the disease is rheumatoid arthritis.