TQB-2858 is a bifunctional fusion protein composed of a monoclonal antibody against PD-L1 fused with the extracellular domain of TGF-β receptor. TQB-2858 has a high affinity for PD-L1, TGF-β1, and TGF-β3 and exhibited high PD-L1 target occupancy. TQB-2858 can be used for the study of osteosarcoma and alveolar soft part sarcoma (ASPS) [1].
