IL2 and retinitis pigmentosa 1: These cytokines were selected for analyses based on their well‐known significance in modulating inflammation response and immune system regulation.[20] The expression of pro‐inflammatory cytokines IL1β, IL2, IL6, and TNFα was significantly increased in RP mice, whereas that of anti‐inflammatory cytokines IL4 and IL5 was significantly decreased (Figure 3F).