- Created on the 12 March, 2017.
Interleukin-4 (IL-4) was first characterised as B cell stimulatory factor (BSF-1) and B-cell differentiation factor (BCDFg). It has been subsequently revealed that IL-4 is a pleiotropic cytokine with many immune response modulating functions on a large number of cell types which include fibroblasts, osteoblasts, endothelial cells, hepatocytes, keratinocytes, astrocytes, mast cells, macrophages and T cells. It is essentially an immunomodulatory cytokine that has the ability to inhibit the growth of tumour cells. Interleukin-4 is known to be produced by mast cells, fetal thymocytes, CD8+ T cells, basophils, CD4+ TH0 and TH2 cells.
The human cDNA is made up of a single open reading frame which encodes a protein of 153 amino acids and this also includes a putative signal peptide. The human IL-4 gene is located on chromosome 5 and it occurs as a single copy in the haploid genome. There are structural and functional similarities between human and mouse IL-4 genes and their proteins, both human and mouse proteins have multiple potential glycosylation sites and six cysteines which are linked by intro-molecular disulfide bridges. There are evidence that IL-4 can act as an autocrine growth factor in pancreatic cancer cells, this has been found to give rise to the possibility that cancer-derived IL-4 being able to suppress the cancer-directed immune-surveillance in vivo, in addition to its growth-promoting effects. This process can result in the facilitation of both pancreatic tumor growth and metastasis. The standard used in this ELISA assay is recombinant human IL-4 that is composed of 130 amino acids with a molecular mass of 14KDa.
Interleukin-4 ELISA kit is designed for measuring in vitro quantitative concentrations of interleukin-4 (IL-4) present in human cell culture supernatant, plasma (EDTA, heparin, citrate) and serum samples. This assay has a minimum detection limit of < 1.5 pg/ml.
The minimum detection sensitivity level of interleukin-4 (IL-4) using this human interleukin-4 ELISA kit was approximately 1.5 pg/ml. The dynamic assay range for this kit is 15.6 – 1,000 pg/ml.
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- Full Name: Interleukin-4 (IL-4) ELISA Kit
- Reactivity: Human
- Sample Type: Cell Culture Supernatant, Plasma (Heparin, EDTA, Citrate), Serum
- Sensitivity: < 1.5 pg/ml