CD8A and neoplasm: Further evaluation of the CTL killing ability through the LDH release assay showed that, compared with that of tumor cells cocultured with CTLs, the killing rate of target cells was higher in the NKP-1339-NBs+US group, whereas the NKP-1339/miR-142-NBs+US group reached the maximum value, which was consistent with the changes in the proportion of CD8+ T cells (Fig. 5E).