Anti-Human PD-L1 (CD274) (Clone 29E.2A3) - Purified in vivo PLATINUM™ Functional Grade

Primary Monoclonal Antibodies>Immune Checkpoints|Monoclonal Antibodies|Purified in vivo Functional Grade>Platinum Purified Bulk Antibodies|Primary Monoclonal Antibodies>SurfaceTag Human CD Markers

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Programmed cell death 1 ligand 1 (PD-L1; CD274; B7-H1) is a type I transmembrane glycoprotein widely expressed in many types of tissues that acts as a ligand for the immune inhibitory receptor programmed cell death 1 (PD-1; CD279)1, 2, 3. The PD-1 pathway is responsible for T cell activation, proliferation, and cytotoxic secretion, with PD-1/PD-L1 interaction triggering inhibitory signals that dampen T cell function. PD-L1 also plays a critical role in the differentiation of inducible regulatory T cells4. In normal tissues, PD-L1/PD-1 ligation is crucial to maintaining homeostasis of the immune system and preventing autoimmunity during infection and inflammation4. In the tumor microenvironment, their interaction provides an immune escape mechanism for tumor cells by turning off cytotoxic T cells. As such, blocking the PD-L1/PD-1 interaction is a target of many anti-cancer immunotherapies. 29E.2A3 was generated by immunizing female BALB/c mice with purified hPD-L1 cDNA5. Spleen cells were fused with SP2/0 myeloma cells, and the resulting hybridomas were screened by ELISA for reactivity against hPD-L1–Ig fusion protein followed by cell-surface staining of hPD-L1–transfected Chinese hamster ovary cells and 300.19 cells.

This monoclonal antibody is aseptically packaged and formulated in 0.01 M phosphate buffered saline (150 mM NaCl) PBS pH 7.2 - 7.4 with no carrier protein, potassium, calcium or preservatives added. Due to inherent biochemical properties of antibodies, certain products may be prone to precipitation over time. Precipitation may be removed by aseptic centrifugation and/or filtration.