Description
Principle of the assay: This assay employs a two-site sandwich ELISA to quantitative iFABP in Human serum, plasma. An antibody specific for iFABP has been pre-coated onto a microplate. Standards and samples are pipetted into the wells and any iFABP present is bound by the immobilized antibody. After removing any unbound substances, a biotin - conjugated antibody specific for iFABP 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 iFABP bound in the initial step. The color development is stopped and the intensity of the color is measured.
Background: The intracellular fatty acid-binding proteins (FABPs) belong to a multigene family with nearly twenty identified members. FABPs are divided into at least three distinct types, namely the hepatic-, intestinal- and cardiac-type. They form 14-15 kDa proteins and are thought to participate in the uptake, intracellular metabolism and/or transport of long-chain fatty acids. They may also be responsible in the modulation of cell growth and proliferation. Intestinal fatty acid-binding protein 2 gene contains four exons and is an abundant cytosolic protein in small intestine epithelial cells. This gene has a polymorphism at codon 54 that identified an alanine-encoding allele and a threonine-encoding allele. Thr-54 protein is associated with increased fat oxidation and insulin resistance