预期应用
ELISA法定量测定人血清、血浆、细胞培养物上清或其它相关液体中 IgE含量。
概述
免疫球蛋白是一组具有抗体活性的蛋白质，存在与血液、体液、外分泌液及某些细胞的膜上。本篇内除特别指出外，均为血清的免疫球蛋白测定。目前，将免疫球蛋白分为IgG、IgA、IgM、IgD、IgE等五类。
实验原理
本试剂盒应用双抗体夹心酶标免疫分析法测定标本中IgE水平。用纯化的抗体包被微孔板，制成固相抗体，往包被单抗的微孔中依次加入IgE、生物素化的抗人IgE抗体、HRP标记的亲和素，经过彻底洗涤后用底物TMB显色。TMB在过氧化物酶的催化下转化成蓝色，并在酸的作用下转化成最终的黄色。颜色的深浅和样品中的IgE呈正相关。用酶标仪在450nm波长下测定吸光度（OD值），计算样品浓度。
Intended use
This immunoassay kit allows for the specific measurement of human IgE concentrations in cell culture supernates, serum, and plasma.
Introduction
IgE immunoglobulin is a four chain molecule with a mol. Wt. Of ~190 kDa. It is a unique class of immunoglobulin, which is important in the mediation of the allergic response. The mechanism of action involves an initial antigenic stimulation of immunocompetent B lymphocytes by specific antigen, a process that includes the lymphocytes to respond by producing specific antibodies of several classes. One class of IgE binds to receptors on the surface of mast cells. Upon further stimulation to specific allergens, these cells-bound IgE molecules bind via their Fab portion to the allergen. This combination triggers the mast cells and baspophiles to release, various vasoactive amines into blood and immediately surrounds tissue. These agents include an increase in vascular permeability, an efflux of blood components and the consequent symptom characteristics of an allergic reaction. Typical symptoms are inflammation and itching in the case of a bronchial reaction.
Test principle
This assay employs the quantitative sandwich enzyme immunoassay technique. A monoclonal antibody specific for IgE has been pre-coated onto a microplate. Standards and samples are pipetted into the wells and any IgE present is bound by the immobilized antibody. An enzyme-linked monoclonal antibody specific for IgE is added to the wells. Following a wash to remove any unbound antibody-enzyme reagent, a substrate solution is added to the wells and color develops in proportion to the amount of IgE bound in the initial step. The color development is stopped and the intensity of the color is measured. | 
