To determine the roles of PD‐L1 in T‐cell activation, T cells were separated from healthy donors (HDs) and stimulated with Cell Stimulation Cocktail and cocultured with either siPD‐L1‐ or siPD‐L1‐NC‐transfected NF2‐associated meningioma cells. The gene discussed is CD274; the disease is meningioma.