CD274 and neoplasm: Furthermore, compared with LPG, GP, and GFP, PGFP not only enhanced T cell‐mediated cytotoxicity against tumor cells (Figure S3I,J, Supporting Information) but also showed a stronger PD‐L1 inhibitory effect (Figure S3K, Supporting Information), likely due to improved cellular uptake and endosomal escape facilitated by both the platelet membrane and fluorinated polymer.