Detection Method:Sandwich
Test principle:This assay employs a two-site sandwich ELISA to quantitate VIP in samples. An antibody specific for VIP has been pre-coated onto a microplate. Standards and samples are pipetted into the wells and anyVIP present is bound by the immobilized antibody. After removing any unbound substances, a biotin-conjugated antibody specific for VIP 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 VIP bound in the initial step. The color development is stopped and the intensity of the color is measured.
Product Overview:Vasoactive intestinal peptide (VIP) is a peptide hormone containing 28 amino acid residues and is produced in many areas of the human body including the gut, pancreas and suprachiasmatic nuclei of the hypothalamus in the brain.It has a half-life in the blood of about two minutes. With respect to the digestive system, VIP seems to induce smooth muscle relaxation (lower esophageal sphincter, stomach, gallbladder), stimulate secretion of water into pancreatic juice and bile, and cause inhibition of gastric acid secretion and absorption from the intestinal lumen. Its role in the intestine is to greatly stimulate secretion of water and electrolytes, as well as dilating intestinal smooth muscle, dilating peripheral blood vessels, stimulating pancreatic bicarbonate secretion, and inhibiting gastrin-stimulated gastric acid secretion.
