SELL and neoplasm: In contrast, IL-12P70-secreting TRACCAR T cells (TRACCAR_CD25IL12, red open circles, and TRACCAR_ ΔPD1IL12, blue open circles, Fig. 6b, upper panel) showed continuous and efficient tumor cell control correlated with the secretion of IL-12P70 and increased surface expression of CD62L (Fig. 6c, d).