Detection Method:Sandwich
Test principle:This assay employs a two-site sandwich ELISA to quantitate LXA4 in samples. An antibody specific for LXA4 has been pre-coated onto a microplate. Standards and samples are pipetted into the wells and anyLXA4 present is bound by the immobilized antibody. After removing any unbound substances, a biotin-conjugated antibody specific for LXA4 is added to the wells. After washing, Streptavidin conjugated Horseradish Peroxidase (HRP) is added to the wells. Following a wash to remove any unbound avidin-enzyme reagent, a substrate solution is added to the wells and color develops in proportion to the amount of LXA4 bound in the initial step. The color development is stopped and the intensity of the color is measured.
Product Overview:Lipoxins are a series of anti-inflammatory mediators. Lipoxins are short lived endogenously produced nonclassic eicosanoids whose appearance in inflammation signals the resolution of inflammation. They are abbreviated as LX, an acronym for lipoxygenase (LO) interaction products. At present two lipoxins have been identified; lipoxin A4?() and lipoxin B4?(LXB4).Lipoxins, as well as certain peptides, are high affinity ligands for the lipoxin A4?receptor (LXA4R), which was first identified based on sequence homology as the formyl peptide receptor like receptor (FPRL1). Lipoxin signaling through the LXA4R inhibits chemotaxis, transmigration, superoxide generation and NF-kappa B activation. Similarly to the leukotrienes, LXA4?will form the cysteinyl-lipoxins LXC4, LXD4?and LXE4. At subnanomolar concentrations, LXA4 and LXB4 inhibit leukotriene-stimulated interactions of human neutrophils and endothelial cells.