| Code | CSB-RA878942MB15HU |
| Size | US$9799 |
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This recombinant monoclonal antibody is developed as a research-grade biosimilar to ADG104, targeting CD274, also known as programmed death-ligand 1 (PD-L1). CD274 is a transmembrane protein that functions as a critical immune checkpoint regulator by binding to PD-1 receptors on T cells, thereby suppressing T cell activation and proliferation. This interaction serves as a physiological mechanism to maintain immune homeostasis and prevent autoimmunity. However, many tumor cells exploit this pathway by overexpressing CD274, effectively evading immune surveillance and creating an immunosuppressive tumor microenvironment. Elevated CD274 expression is associated with various malignancies, including non-small cell lung cancer, melanoma, renal cell carcinoma, and bladder cancer.
ADG104 is an engineered anti-PD-L1 IgG1 monoclonal antibody. It can bind to PD-L1 on tumor cells or immune cells with high affinity, blocking the interaction between PD-L1 and PD-1 on T cells, thereby relieving the inhibition on T cells. The Fc segment of ADG104 has been modified to specifically bind to the inhibitory receptor FcγRIIB, which enables ADG104 to block PD-L1 while actively enhancing the anti-tumor immune response, potentially overcoming the resistance to existing PD-L1 drugs. It is currently in clinical phase I/II and is being evaluated for its safety and initial efficacy in treating advanced solid tumors. This biosimilar antibody serves as a valuable research tool for investigating immune checkpoint mechanisms, studying tumor immune evasion strategies, evaluating PD-L1 expression patterns in various cancer types, and supporting preclinical immunotherapy studies.
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