FOLH1 and neoplasm: We further demonstrated that the tumor killing efficiency of T cells armed with 6–100% of the maximum anti-PSMA/anti-CD3 (Fab-scFv) loading amount or with 17% to 100% of the maximum anti-PSMA/anti-CD3 (scFv-Fab) loading amount on their surfaces was significantly higher than that of OKT3-T cells in killing LNCaP cells (Fig. 4D, Additional file 11: table S2-S3).