摘要
以抗人IL-2多克隆抗体为包被抗体,以IL-2-HSA融合蛋白为夹心抗原,以辣根过氧化物酶(HRP)标记的抗HSA单克隆抗体为检测抗体,建立了一种定量测定完整的IL-2-HSA融合蛋白的双抗体夹心ELISA方法。包被抗体和检测抗体的最佳工作浓度分别为为2μg/mL和0.5μg/mL,方法的线性检测范围39.06～1250ng/mL,标准曲线回归方程为y=0.4429x-1.1433,r=0.9966,灵敏度可达10.25ng/mL,批内、批间变异系数分别为6.40%和7.81%,发酵上清液中回收率为98.13%～102.94%,与IL-2、HSA基本无交叉反应,健全性分析表明发酵液及小鼠血清组分及稀释倍数对该方法无影响。该方法可用于该融合蛋白的发酵过程优化、分离纯化工艺、后期药动学、临床研究等的定量检测。
A double antibody sandwich ELISA for quantitative analysis of recombinant fusion protein IL-2-HSA was constructed using a polyclonal antibody to human IL-2 for capture and a monoclonal antibody to HSA with HRP-labeled conjugate for detection.The optimal concentration of the first coating antibody and detection antibody were 2 μg/mL and 0.5 μg/mL,respectively.Regression equation of the linear calibration curve was：y=0.442 9 x-1.143 3 with a correlation coefficient of 0.996 6,and the linear detection ranged from 39.06 ng/mL to 1 250 ng/mL.Recovery from the supernatant of fermentation broth was 98.13% to 102.94%.The specificity assay indicated that it had little cross-reactions with IL-2 and HSA.The soundness analysis suggested that fermentation broth,mouse serum and dilution had no influence on the method.The present method can be used in the studies on fermentation,purification and clinical diagnosis.
出处
《中国药科大学学报》
CAS
CSCD
北大核心
2010年第2期175-179,共5页
Journal of China Pharmaceutical University
基金
国家自然科学基金资助项目(No.30970029)
江苏省产学研联合创新资金计划资助项目(No.BY2009110)~~
