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EK000114-EK0532: Human TRAIL ELISA Kit
Range 15.6ug/ml-1000ug/ml
Sensitivity < 1ug/ml
Specificity: No detectable cross-reactivity with any other cytokine.
Application: For quantitative detection of human TRAIL in sera, plasma, body fluids, tissue lysates or cell culture supernates.
Expiration: four months at 4°C and eight months at -20°C.
Background
In the field of cell biology, TNF-related apoptosis-inducing ligand (TRAIL), is a protein which functions as a ligand which induces the process of cell death called apoptosis. TRAIL has also been designated CD253 (cluster of differentiation 253).[1][2] Tumor necrosis factor (TNF) family cytokines function as prominent mediators of immune regulation and the inflammatory response. Most TNF family cytokines are expressed as type II transmembrane proteins, with homology confined to approximately 150 C-terminal residues. The TNF ligands interact with a parallel family of receptors. TRAIL binds to the death receptors DR4 (TRAIL-RI) and DR5 (TRAIL-RII). The process of apoptosis is caspase-8-dependent. Caspase-8 activates downstream effector caspases including procaspase-3, -6, and -7, leading to activation of specific kinases.[3] TRAIL also binds the receptors DcR1 and DcR2, which do not contain a cytoplasmic domain (DcR1) or contain a truncated death domain (DcR2). The standard product used in this kit is recombinant human TRAIL with the molecular mass of 21KDa. It is expressed from the amino acids ectoderm T95--G28.
Principle
The ELISA Kit is based on standard sandwich enzyme-linked immune-sorbent assay technology. The target specific antibodies are precoated onto 96-well plates. The target from the sample is bound to the microwell. The biotinylated target specific detection antibodies are added to the microwells and followed by washing with the PBS or TBS buffer. Avidin-Biotin-Peroxidase Complex is added and unbound conjugates are washed away with the PBS or TBS buffer. TMB, the HRP (horseradish peroxidase) substrate, is used to visualize color change resulting from the HRP enzymatic reaction. TMB is catalyzed by HRP to produce the blue color. The color changes into yellow after the acidic stop solution is added. The density of the yellow color is proportional to the target amount from the sample captured in the microwells.
Reference
1. ^ Wiley SR, Schooley K, Smolak PJ, Din WS, Huang CP, Nicholl JK, Sutherland GR, Smith TD, Rauch C, Smith CA (December 1995). "Identification and characterization of a new member of the TNF family that induces apoptosis". Immunity 3 (6): 673?2...
2. ^ Pitti RM, Marsters SA, Ruppert S, Donahue CJ, Moore A, Ashkenazi A (May 1996). "Induction of apoptosis by Apo-2 ligand, a new member of the tumor necrosis factor cytokine family". J. Biol. Chem. 271 (22): 126870..
3. ^ Song JJ, Lee YJ (May 2008). "Differential cleavage of Mst1 by caspase-7/-3 is responsible for TRAIL-induced activation of the MAPK superfamily". Cell. Signal. 20 (5): 892?06.
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