In this study, we determine the effects of BEA on CTSB within granulocyte‐macrophage colony‐stimulating factor (GM‐CSF)‐cultured bone marrow‐derived dendritic cells (BMDCs) and human leukemia monocytic cell line THP‐1 induced immature dendritic cells (iDCs). This evidence concerns the gene CSF2 and leukemia.