Our study also elucidated that after coculture with DLBCL cell lines, CB CD19-CAR T cells show significantly upregulated TNFSF9, TNFRSF8, TNFRSF9, and STAT1 compared with CB T and CB CD19-CAR T cells. The gene discussed is TNFSF9; the disease is diffuse large B-cell lymphoma.