IL2 and neoplasm: Furthermore, the addition of PTA to this system further enhanced the effector functions, with Vγ9Vδ2 T cells killing approximately 80% of Raji cells in 1 h at the E/T ratio of 200, confirming that the PTA/IL-2-expanded Vγ9Vδ2 T cells could exhibit potent effector functions against tumor cells(online supplementary file 1).