Development of an Enzyme-linked Immuno-Sorbent Assay (ELISA) Method for Carbofuran Residues
作者:Jinyi Yang、Hong Wang、Yueming Jiang、Yuanming Sun、Ke Pan、Hongtao Lei、Qing Wu、Yudong Shen、Zhili Xiao、Zhenlin Xu
DOI:10.3390/molecules13040871
日期:——
The haptens 4-[[(2,3-dihydro-2,2-dimethyl-7-benzofuranyloxy)carbonyl]-amino]butanoic acid (BFNB) and 6-[((2,3-dihydro-2,2-dimethyl-7-benzofuranyloxy)-carbonylamino]hexanoic acid (BFNH) were synthesized and then used to develop a rapid,specific and sensitive ELISA method to determine residues of the pesticide carbofuran in avariety of matrices. A hybridoma cell line (5D3) producing anti-carbofuran monoclonalantibodies (MAbs) was also established. Based on the MAbs in combination with theheterologous hapten BFNH coupled to either horseradish peroxidase (HRP) or ovalbumin(OVA), four ELISAs (formats I-IV) for the quantification of carbofuran were developedand compared. Among them, the optimized format II (the conjugate-coated directcompetitive ELISA) showed the best characteristics, with an IC50 value of 18.49 ng/mL, alimit of detection of 0.11 ng/mL and the shortest assay time (1 h). This ELISA method wasthen applied to the determinations of carbofuran in environmental water, soil and foodsamples. The relative standard deviations (R.S.D.s) ranged from 1.8% to 21.3% and themean recoveries were 104.6%, 108.3%, 106.3% and 100.1% for water, soil, lettuce andcabbage, respectively. Thus, the ELISA method of format II exhibited the potential todevelop commercial ELISA kits for a rapid detection of carbofuran for human health andenvironmental safety.
半抗原 4-[[(2,3-二氢-2,2-二甲基-7-苯并呋喃氧基)羰基]-氨基]丁酸 (BFNB) 和 6-[((2,3-二氢-2,2-二甲基)合成了-7-苯并呋喃基氧基)-羰基氨基]己酸(BFNH),然后用于开发快速、特异且灵敏的ELISA方法来测定各种产生抗-7-苯并呋喃基氧基)-羰基氨基]己酸的杂交瘤细胞系(5D3)中农药呋喃丹的残留量。还建立了呋喃丹单克隆抗体 (MAb),基于该 MAb 与偶联辣根过氧化物酶 (HRP) 或卵清蛋白 (OVA) 的异源半抗原 BFNH,开发并比较了四种用于定量呋喃丹的 ELISA(格式 I-IV)。其中,优化的形式II(缀合物包被的直接竞争ELISA)表现出最好的特性,其IC50值为18.49 ng/mL,检测限为0.11 ng/mL,并且该ELISA的检测时间最短(1 h)。然后将该方法应用于环境水、土壤和食品样品中克百威的测定。水、土壤、生菜和卷心菜的相对标准偏差 (R.S.D.s) 范围为 1.8% 至 21.3%,平均回收率分别为 104.6%、108.3%、106.3% 和 100.1%。因此,格式II的ELISA方法展现了开发商业ELISA试剂盒的潜力,用于快速检测呋喃丹,以保障人类健康和环境安全。