建立基于抗体的新型多式高灵敏免疫测试平台,用于在农业样本中检测Bacillus thuringiensis Vip3Aa毒素
Mengyuan Zhang1,2, Jiafeng Jin3, Wei Chen2
1College of Light Industry and Food Engineering, Nanjing Forestry University, Nanjing, 210037, Jiangsu, China.
Analytical and bioanalytical chemistry
|March 2, 2026
概括
在作物中敏感检测Bacillus thuringiensis Vip3Aa毒素对于农业监测至关重要. 这项研究开发了多模式免疫测试,包括ELISA,光和横流测试,以准确量化Vip3Aa毒素和快速查.
科学领域:
- 农业科学 农业科学
- 生物技术是生物技术.
- 分析化学 分析化学
背景情况:
- 来自Bacillus thuringiensis (Bt) 的Vip3Aa毒素对于转基因作物的杀虫特征至关重要.
- 敏感且可靠的Vip3Aa毒素检测方法对于农业监测和监管合规至关重要.
研究的目的:
- 开发和验证用于敏感和特定检测Vip3Aa毒素的新型免疫测试格式.
- 建立用于实验室定量和快速现场查Vip3Aa毒素在农业样本中的方法.
主要方法:
- 产生一种高亲和度的抗Vip3Aa毒素单克隆抗体 (H12-mAb) 和多克隆抗体 (Y26-pAbs).
- 三种免疫测试平台的开发:双抗体三明治ELISA (DAS-ELISA),聚合诱导的发射光免疫测试 (AIE-FLIA) 和基于黄金纳米粒子的侧向流免疫测试 (AuNPs-LFIA).
- 在农业矩阵中验证测试性能,评估检测极限 (LOD),回收和变化系数 (CV).
主要成果:
- 开发出的抗体表现出高的结合亲和力.
- 免疫试验实现了低检测极限:9.68 ng/mL (DAS-ELISA),1.95 ng/mL (AIE-FLIA) 和31.25 ng/mL (AuNPs-LFIA),所有这些都低于转基因组织中的Vip3Aa表达水平.
- 优秀的方法性能得到了证实,高的内部和测试间恢复 (分别为90.3-99.1%和83.6-99.9%) 和低的CVs (1.4-10.6%).
- AIE-FLIA和AuNPs-LFIA已经证明了现场查的实际适用性.
结论:
- 开发的多模式免疫试验为Vip3Aa毒素残留分析提供了强大的工具.
- 这些试验既能准确地进行实验室定量,又能快速地在现场进行查,支持对表达Vip3Aa的转基因作物的农业监测.
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