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角蛋白17(KRT17)是由KRT17基因编码的 。角蛋白17是一种I型细胞角蛋白。它存在于甲床、毛囊、皮脂腺和其他表皮附属物。编码该蛋白的基因突变导致PC-K17(以前称为Jackson-Lawler)型先天性厚皮症和多发性脂肪囊肿。角蛋白17(K17)是“银屑病相关性细胞角蛋白”,与链球菌M蛋白具有相同的序列ALEEAN,可特异刺激银屑病T细胞,使之活化、释放IFN-γ等炎症因子,而IFN-γ又能够经STAT1信号通路上调K17的表达,使机体产生针对K17的自身免疫反应,从而形成了一个恶性环路,导致炎症反应和KC异常增生等病理改变,成为银屑病发病过程中的关键环节。 本试剂盒采用双抗体夹心法酶联免疫吸附试验(ELISA)。往预先包被有人角蛋白17(KRT17)捕获抗体的微孔中,依次加入样本、标准品、生物素标记的检测抗体,HRP酶结合物,中间经过温育和洗涤,用底物TMB显色,TMB在过氧化物酶(HRP)的催化下转化成蓝色,并在酸的作用下转化成最终的黄色。颜色的深浅和样本中的人角蛋白17(KRT17)呈正相关。用酶标仪在450nm 波长下测定吸光度(OD值),计算样本浓度。
This kit employs the sandwich enzyme-linked immunosorbent assay (ELISA) principle. Microplate wells are pre-coated with a capture antibody specific to Human KRT17. Following this, the sample, standards, a biotin-conjugated detection antibody, and an HRP (horseradish peroxidase)-labeled conjugate are added sequentially to the wells. The procedure involves incubation and wash steps between each addition. For detection, TMB substrate is used. TMB yields a blue color in the presence of the peroxidase activity of HRP. The reaction is then stopped with an acid solution, which converts the blue color to a final yellow color. The intensity of the yellow color is directly proportional to the concentration of Human KRT17 present in the sample. The optical density (OD) is measured at a wavelength of 450 nm using a microplate reader. Finally, the concentration of the target analyte in the sample is calculated based on the standard curve generated from the standards.