Generation of a highly specific recombinant full-length antibody for detecting ethirimol in fruit and environmental water
作者:Xingmei Lei、Peipei Li、A.M. Abd El-Aty、Jing Zhao、Lingyuan Xu、Song Gao、Jia Li、Yun Zhao、Yongxin She、Fen Jin、Jing Wang、Lufei Zheng、Bruce D. Hammock、Maojun Jin
DOI:10.1016/j.jhazmat.2024.134067
日期:2024.5
High-performance antibodies are core reagents for highly sensitive immunoassays. Herein, based on a novel hapten, a hybridoma secreting the high-affinity anti-ethirimol monoclonal antibody (mAb-14G5F6) was isolated with an IC value of 1.35 μg/L and cross-reactivity below 0.20% for 13 analogs. To further address the challenge of hybridoma preservation and antibody immortalization, a recombinant full-length
高性能抗体是高灵敏度免疫测定的核心试剂。在此,基于一种新的半抗原,分离出一种分泌高亲和力抗乙基醇单克隆抗体 (mAb-14G5F6) 的杂交瘤,IC 值为 1.35 μg/L,13 种类似物的交叉反应性低于 0.20%。为了进一步应对杂交瘤保存和抗体永生化的挑战,使用基于 mAb-14G5F6 基因的 HEK293(F) 表达系统表达重组全长抗体 (rAb-14G5F6)。rAb-14G5F6 的亲和力、特异性和耐受性,通过间接竞争性酶联免疫吸附测定和非竞争性表面等离子体共振表征,与 mAb-14G5F6 表现出高度一致性。开发了基于 rAb-14G5F6 的进一步免疫测定法,用于灌溉水和草莓果实,检测限分别为 0.0066 和 0.036 mg/kg,回收率为 80100%,变异系数低于 10%。此外,同源模拟和分子对接显示,GLU(L40)、GLY(L107)、GLY(H108) 和 ASP(H114)