CD274 and neoplasm: Dai et al. prepared a nanounit HGF for immunosuppression reversion when hydrophobic 5 β‐cholanic acid (CA) was conjugated in hyaluronic acid (HA) with exosome inhibitor GW4869 encapsulation and polyphenol conjugation for Fe3+ coordination.[44] The authors claimed that GW4869 release from HGF decreased tumor‐derived exosome secretion as well as impaired exosomal PD‐L1.