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Insulin含量。
概述
Insulin—胰岛素。胰岛素前体经剪切后形成A和B链，由两个二硫键结合成胰岛素，结合受体后刺激细胞摄取葡萄糖。
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胰岛素水平。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胰岛素抗原、生物素化的抗人胰岛素抗体、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胰岛素呈正相关。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 Insulin concenthumanions in cell culture supernates, serum, and plasma.
Introduction
Insulin is a polypeptide hormone originating in the beta cells of the pancreas and serving as a principal regulator for the storage and production of carbohydhumanes. Its secretion is normally stimulated by increases in the amount of glucose in circulation. This leads to higher insulin levels and more rapid tissueassimilation of glucose followed by a decline in the insulin level as the glucose level subsides. In a number of conditions, notably insulinoma and diabetes, this relationship is impaired. Insulin tends to circulate at inappropriately high levels in patients with insulin-secreting pancreatic tumors; such tumors can thus be a cause of hypoglycemia. Accordingly, insulin immunoassays used sometimes in connection with provocative doses of tolbutamide or calcium play an essential role in the identification (and localization) of insulinomas. The finding of fasting hypoglycemia in association with an inappropriately high serum insulin concenthumanion is considered diagnostic. Insulin levels do not figure in the subclassification of diabetes worked out by the National Diabetes Data Group. Nevertheless, when obtained in the course of a glucose tolerance test, they appear to be of some prognostic value in predicting the benefits of insulin therapy and the likelihood of progression to insulin-dependence and the complications (such as retinopathy) characteristic of diabetes.
Test principle
This assay employs the quantitative sandwich enzyme immunoassay technique. A monoclonal antibody specific for Insulin has been pre-coated onto a microplate. Standards and samples are pipetted into the wells and any Insulin present is bound by the immobilized antibody. An enzyme-linked monoclonal antibody specific for Insulin is added to the wells. Following a wash to remove any unbound antibody-enzyme reagent, a substhumane solution is added to the wells and color develops in proportion to the amount of Insulin bound in the initial step. The color development is stopped and the intensity of the color is measured.
| 
