AXL and sarcoma: To assess the activity of pAXL×CD3ε, sarcoma cells with different expression levels of AXL were co-cultured with purified human T cells (E:T ratio selected at 10:1) from healthy donors, in the presence of three different concentrations of pAXL×CD3ε (0.1 μg/mL, 1 μg/mL, and 2.5 μg/mL) for 72 h.