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  • An immunoglobulin G4 (IgG4), humanized monoclonal antibody directed against the immunosuppressive ligand programmed cell death-1 ligand 1 (PD-L1; cluster of differentiation 274; CD274), with potential immune checkpoint inhibitory and antineoplastic activities. Upon administration, anti-PD-L1 monoclonal antibody SHR-1316 specifically targets and binds to PD-L1, blocking its binding to and activation of its receptor programmed death 1 (PD-1). This reverses T-cell inactivation caused by PD-1/PD-L1 signaling and enhances the cytotoxic T-lymphocyte (CTL)-mediated anti-tumor immune response against PD-L1-expressing tumor cells. PD-L1 is overexpressed by many human cancer cell types. PD-L1 binding to PD-1 on T cells suppresses the immune system and results in immune evasion. PD-1, a transmembrane protein belonging to the immunoglobulin superfamily expressed on activated T cells, is a negative regulator of the immune system that limits the expansion and survival of CD8-positive T cells. Check for \'https://www.cancer.gov/about-cancer/treatment/clinical-trials/intervention/C148535\' active clinical trials using this agent. (\'http://ncit.nci.nih.gov/ncitbrowser/ConceptReport.jsp?dictionary=NCI%20Thesaurus&code=C148535\' NCI Thesaurus)
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