CD1D and neoplasm: Under high tumor load conditions and BCMA+CD1d+ tumor cells, Allo/U15BCAR-NKT cells still effectively suppressed tumor growth and achieved tumor clearance in a portion of the experimental mice (specifically, three out of five mice for Allo15BCAR-NKT cells and three out of six for U15BCAR-NKT cells) (Figures 5J–5L).