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EK000119-EK0684: Human CCL17/TARC ELISA Kit
Range 31.2pg/ml-2000pg/ml
Sensitivity < 1 pg/ml
Specificity: No detectable cross-reactivity with any other cytokine.
Application: For quantitative detection of human CCL17/TARC in sera, plasma, body fluids, tissue lysates or cell culture supernates.
Expiration: Four months at 4°C and eight months at -20°C.
Background
Chemokine (C-C motif) ligand 17 (CCL17) is a small cytokine belonging to the CC chemokine family that is also known as thymus and activation regulated chemokine (TARC). CCL17 is expressed constitutively in thymus, but only transiently in phytohemagglutinin-stimulated peripheral blood mononuclear cells.1 This chemokine specifically binds and induces chemotaxis in T cells and elicits its effects by interacting with the chemokine receptor CCR4.1,2The gene for CCL17 is located on chromosome 16, in humans, along with other chemokines called CCL22 and CX3CL1.3,4 The standard used in this kit is recombinant human CCL17, consisting of 71 amino acids with the molecular weight of 8Kda.
Principle
CCL17 ELISA Kit was based on standard sandwich enzyme-linked immune-sorbent assay technology. Human CCL17 specific-specific polyclonal antibodies were precoated onto 96-well plates. The human specific detection polyclonal antibodies were biotinylated. The test samples and biotinylated detection antibodies were added to the wells subsequently and then followed by washing with PBS or TBS buffer. Avidin-Biotin-Peroxidase Complex was added and unbound conjugates were washed away with PBS or TBS buffer. HRP substrate TMB was used to visualize HRP enzymatic reaction. TMB was catalyzed by HRP to produce a blue color product that changed into yellow after adding acidic stop solution. The density of yellow is proportional to the human CCL17 amount of sample captured in plate.
Reference
1. Imai T, Yoshida T, Baba M, Nishimura M, Kakizaki M, Yoshie O (1996). "Molecular cloning of a novel T cell-directed CC chemokine expressed in thymus by signal sequence trap using Epstein-Barr virus vector". J. Biol. Chem. 271 (35): 21514-1.
2. Imai T, Baba M, Nishimura M, Kakizaki M, Takagi S, Yoshie O (1997). "The T cell-directed CC chemokine TARC is a highly specific biological ligand for CC chemokine receptor 4". J. Biol. Chem. 272 (23): 15036-2.
3. Nomiyama H, Imai T, Kusuda J, Miura R, Callen DF, Yoshie O (1997). "Assignment of the human CC chemokine gene TARC (SCYA17) to chromosome 16q13". Genomics 40 (1): 211.
4. Nomiyama H, Imai T, Kusuda J, Miura R, Callen DF, Yoshie O (1998). "Human chemokines fractalkine (SCYD1), MDC (SCYA22) and TARC (SCYA17) are clustered on chromosome 16q13". Cytogenet. Cell Genet. 81 (1): 10?.
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