could serve as a universal measure to overcome platelet transfusion refractoriness caused
by HLA-I incompatibility. Here, we developed human induced pluripotent cell-derived HLA-I-
deficient platelets (HLA-KO iPLATs) in a clinically applicable imMKCL system by genetic
manipulation and assessed their immunogenic properties including natural killer (NK) cells,
which reject HLA-I downregulated cells. HLA-KO iPLATs were deficient for all HLA-I but did …