PathScan® Total PD-L1 Sandwich ELISA Kit #14784
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- ELISA
Important Ordering Details
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Supporting Data
| REACTIVITY | H |
Application Key:
- ELISA-ELISA
Species Cross-Reactivity Key:
- H-Human
Product Information
Product Description
The PathScan® Total PD-L1 Sandwich ELISA Kit is a solid phase sandwich enzyme-linked immunosorbent assay (ELISA) that detects endogenous levels of PD-L1 protein. A rabbit antibody toward intracellular PD-L1 has been coated onto the microwells. After incubation with cell lysates, PD-L1 protein is captured by the coated antibody. Following extensive washing, a mouse detection antibody toward extracellular PD-L1 is added to detect the captured PD-L1 protein. Anti-mouse IgG, HRP-linked antibody is then used to recognize the bound detection antibody. HRP substrate, TMB, is added to develop color. The magnitude of the absorbance for the developed color is proportional to the quantity of PD-L1 protein.
*Antibodies in this kit are custom formulations specific to kit.
*Antibodies in this kit are custom formulations specific to kit.
Protocol
Specificity / Sensitivity
PathScan® Total PD-L1 Sandwich ELISA Kit detects endogenous levels of PD-L1 protein as shown in Figure 1. The kit sensitivity is shown in Figure 2. This kit detects proteins from the indicated species, as determined through in-house testing, but may also detect homologous proteins from other species.
Species Reactivity:
Human
Background
Programmed cell death 1 ligand 1 (PD-L1, B7-H1, CD274) is a member of the B7 family of cell surface ligands that regulate T cell activation and immune responses. The PD-L1 ligand binds the PD-1 transmembrane receptor and inhibits T cell activation. PD-L1 was discovered following a search for novel B7 protein homologs and was later shown to be expressed by antigen presenting cells, activated T cells, and tissues including placenta, heart, and lung (1-3). Similar in structure to related B7 family members, PD-L1 protein contains extracellular IgV and IgC domains and a short, cytoplasmic region. Research studies demonstrate that PD-L1 is expressed in several tumor types, including melanoma, ovary, colon, lung, breast, and renal cell carcinomas (4-6). Expression of PD-L1 in cancer is associated with tumor-infiltrating lymphocytes, which mediate PD-L1 expression through the release of interferon gamma (7). Additional research links PD-L1 expression to cancers associated with viral infections (8,9).
- Dong, H. et al. (1999) Nat Med 5, 1365-9.
- Freeman, G.J. et al. (2000) J Exp Med 192, 1027-34.
- Liang, S.C. et al. (2003) Eur J Immunol 33, 2706-16.
- Dong, H. et al. (2002) Nat Med 8, 793-800.
- Thompson, R.H. et al. (2006) Cancer Res 66, 3381-5.
- Pardoll, D.M. (2012) Nat Rev Cancer 12, 252-64.
- Taube, J.M. et al. (2012) Sci Transl Med 4, 127ra37.
- Lyford-Pike, S. et al. (2013) Cancer Res 73, 1733-41.
- Chen, B.J. et al. (2013) Clin Cancer Res 19, 3462-73.
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