Rational hapten design to produce high-quality antibodies against carbamate pesticides and development of immunochromatographic assays for simultaneous pesticide screening
作者:Zi-Jian Chen、Hui-Ling Wu、Zhi-Li Xiao、Hui-Jun Fu、Yu-Dong Shen、Lin Luo、Hong Wang、Hong-Tao Lei、Surat Hongsibsong、Zhen-Lin Xu
DOI:10.1016/j.jhazmat.2021.125241
日期:2021.6
Carbamate pesticides (CPs) are the most used pesticides in agricultural production and pest control. In this study, carbofuran, isoprocarb and carbaryl were employed as models, and a general hapten strategy based on carbamate moiety recognition was proposed. Molecular modeling of the three-dimensional (3D) structure and surface electrostatic potential of the CPs indicated that the amide group formed
氨基甲酸酯类农药(CPs)是农业生产和病虫害防治中最常用的农药。本研究以克百威、异丙威和甲萘威为模型,提出了一种基于氨基甲酸酯部分识别的通用半抗原策略。CP 的三维 (3D) 结构和表面静电势的分子模型表明,通过共轭形成的酰胺基团显着影响了抗体的识别。所提出的策略用于获得三种敏感和特异的单克隆抗体 (mAb),IC 为50克百威、异丙威和西萘威的值分别为 1.4 ng/mL、8.4 ng/mL 和 13.8 ng/mL。观察到与类似物的交叉反应性 (%) 可忽略不计,除了异布威 (84.6%) 的异丙威。获得的抗体用于开发免疫色谱法 (ICA) 以同时定量检测三种 CP。使用条带读数器将定量限 (LOQ) 确定为 0.05 ng/mL(克百威)、31.3 ng/mL(异丙威)和 31.3 ng/mL(西维因)。黄瓜和大白菜样品的回收率为 76% 至 111%,CV 为 1.3% 至 10.