LAMP1 and neoplasm: Without target stimulation, we observed slightly higher CD107a expression in MSLN.CAR-IL-15 iNK cells than in mock iNK and MSLN.CAR iNK cells; when stimulated with KLM-1 tumor cells, MSLN.CAR iNK and MSLN.CAR-IL-15 iNK cells demonstrated higher CD107a expression, while mock iNK cells had limited CD107a expression (Fig. 4C).