Nucleofection of CD8 T cells were performed following the manufacturer’s (Lonza) protocol, and as described in detail elsewhere (3 (link)). In short, 1×106 CD8 T cells were resuspended in 100uL of Nucleofector buffer (Lonza) along with the RNP complex, with or without the p53siRNA (Santa Cruz, sc-29436) in a glass cuvette (Lonza). Nucleofector 2b device (Lonza) with Nucleofector program X001 was used. Following nucleofection, cell suspension was removed from cuvette, placed in Eppendorf tube with 100 uL of RPMI 1640 (Gibco) containing 10% fetal calf serum (Gibco). After incubation at 37°C for 10 min, the CD8 T cells were then placed in culture containing the T cell growth media (Lonza) or transferred intravenously into recipient mouse.