Description(s):
Interleukin-4 (IL-4) is a cytokine that that plays many biological roles, including the stimulation of activated B-cell and T-cell proliferation, and the differentiation of CD4+ T-cells into Th2 cells. It is a key regulator in humoral and adaptive immunity. IL-4 binds to a cell surface receptor complex that consists of the IL-4 binding protein (IL-4R alpha) and the gamma chain of the IL-2 receptor complex (gamma c).
Detection Range:
- 16 - 1000 pg/mL
Sensitivity:
- 8 pg/mL
Principle
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The ELISA is based on the principle of a solid phase enzyme-linked immunosorbent assay. The assay utilizes a mouse anti-human cytokine antibody for immobilization on the microtiter wells and goat anti-human cytokine antibodies along with streptavidin conjugated to horseradish peroxidase (HRP) for detection. The test sample is allowed to react simultaneously with the two antibodies, resulting in the molecules of the cytokine being sandwiched between the solid phase and enzyme-linked antibodies. After incubation, the wells are washed to remove unbound-labeled antibodies. A HRP substrate, TMB, is added to result in the development of a blue color. The color development is then stopped with the addition of Stop Solution changing the color to yellow. The concentration of the cytokine is directly proportional to the color intensity of the test sample. Absorbance is measured spectrophotometrically at 450 nm. |
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Data
Literature
View user manualCitations
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Human periodontal ligament fibroblasts stimulate osteoclastogenesis in response to compression force through TNF-α-mediated activation of CD4+ T cells. Kook SH, Jang YS, Lee JC. J Cell Biochem. 2011 Oct;112(10):2891-901.
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A Multi-Analyte Assay for the Non-Invasive Detection of Bladder Cancer. Goodison S, Chang M, Dai Y, Urquidi V, Rosser CJ. PLoS One., 2012;7(10):e47469. doi: 10.1371/journal.pone.0047469. Epub 2012 Oct 19.
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