CD4 and neoplasm: CD4+ or CD8+ T cells incubated with tumor target cells and the diabody (10 pM) released higher amounts of IL3 (CD4+ T: 388.30 ± 44.11 pg/ml, CD8+ T: 175.85 ± 28.37 pg/ml), TNFα (CD4+ T: 201.32 ± 13.22 pg/ml, CD8+ T: 732.26 ± 45.90 pg/ml), and IFNγ (CD4+ T: 32.95 ± 4.39 ng/ml, CD8+ T: 30.85 ± 6.49 ng/ml).