To determine the potential cytokines responsible for GSTO1 induction in bladder cancer, HT1376 was treated with individual cytokines, including GRO‐α, GM‐CSF, M‐CSF, MIP‐1β, IL‐1α, IL‐1β, IL‐2, IL‐6, IL‐18, SDF‐1α, TNF‐α, and VEGF‐A. This evidence concerns the gene IL1B and urinary bladder cancer.