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开发一种以二胺基为基础的竞争性免疫试验,用于内硫:洞察从小分子的独特识别机制

Tianyang You¹, Jinyu Ma¹, Wenjing Feng¹

¹College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China; State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing 210095, China.

|November 22, 2025

概括

类仿制药为检测小分子污染物 (SMPs) 提供了一种无毒的方法. 这项研究澄清了它们的结合机制,使得在食品和土壤样本中能够优化检测内硫.

科学领域:

分析化学分析化学
生物化学生物化学
食品安全食品安全

背景情况:

类模拟剂正在成为非有毒的替代品,用于在食品中检测小分子污染物 (SMP) 的哈基抗原.
了解SMPs和类药物之间的竞争性结合机制对于其优化和应用至关重要.

研究的目的:

调查皮多米米药物与抗内硫单克隆抗体 (mAb) 的结合机制.
开发和验证一种优化的基于二的免疫试验,用于在各种矩阵中检测内硫.

主要方法:

隔离和表征13种针对抗内硫mAb的特异性二甲基.
使用AlphaFold 3和局部定向突变发生的结合机制的分析.
针对内硫检测,优化P-ELISA (基于Peptidomimetic的酶链接免疫吸收试验).

主要成果:

类模拟剂与内硫竞争,但与抗体呈现不同的相互作用模式.
优化的P-ELISA实现了7.10 ng/mL的IC50和1.55 ng/mL的LOD对于endosulfan.
在果,子和土壤样本中的方法验证显示了高恢复率 (74.4%-90.6%) 和与GC-MS的良好相关性 (R2 = 0.9715).

结论:

这项研究提供了一种可靠的P-ELISA方法,用于在食品和土壤中检测内硫.
这些发现提供了对二甲基结合机制的宝贵见解,有助于它们的合理设计和优化以检测污染物.

关键词:

末硫是一种内硫.在P-ELISA中,类模拟剂类模拟剂类模拟剂农药残留物农药残留物

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Enzyme-Linked Immunosorbent Assay

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In 1971, Peter Perlman and Eva Engvall developed an Enzyme-linked immunosorbent assay (ELISA or EIA). ELISA differs from western blot in that the assays are conducted in microtiter plates or in vivo rather than on an absorbent membrane.
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