针对Bt Cry毒素的广泛抗体的合理设计和应用
Jiafeng Jin1, Wei Chen2, Chongxin Xu3
1Jiangsu Key Laboratory for Food Quality and Safety-State Key Laboratory Cultivation Base of Ministry of Science and Technology, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, China; School of Food and Biological Engineering, Jiangsu University, Zhenjiang, 212013, China; College of Plant Protection, Nanjing Agricultural University, Nanjing, 210023, China.
研究人员开发了广泛的抗体和敏感的DAS-ELISAs,用于检测食品和环境样本中常见的Bt Cry毒素. 这种方法可以准确监测毒素残留物,提高食品安全和环境保护.
科学领域:
- 生物化学 生物化学
- 免疫学 免疫学 免疫学
- 分析化学 分析化学
背景情况:
- 细菌 thuringiensis (Bt) 哭毒素是广泛使用的生物杀虫剂.
- 对Bt Cry毒素的有效检测方法对于食品安全和环境监测至关重要.
- 现有的检测方法可能缺乏宽频覆盖或灵敏度.
研究的目的:
- 开发针对Bt Cry毒素的广谱多克隆抗体 (pAbs) 和单克隆抗体 (mAb).
- 建立敏感和准确的双抗体三明治酶链接免疫吸收试验 (DAS-ELISAs) 以检测多种Cry毒素亚型.
- 为了验证开发的DAS-ELISAs用于分析各种食品和环境矩阵中的Crytoxin残留物.
主要方法:
- 基于Bt Cry毒素序列和结构的免疫原体的设计和生产.
- 选择和特征的宽频pAbs和一个特定的mAb (1A0-mAb).
- 对抗体度的优化和对Cry1,Cry2Ab和Cry3Aa毒素的DAS-ELISAs的开发.
主要成果:
- 广谱pAbs识别了Cry1,Cry2Aa,Cry2Ab和Cry3Aa毒素,其IC50值为0.12-9.86μg/mL.
- 1A0-mAb识别了Cry1,Cry2Ab和Cry3Aa毒素 (IC50值为4.66-20.46μg/mL),但不包括Cry2Aa.
- 开发的DAS-ELISA测试显示了低检测极限 (LOD:2.36-36.37 ng/mL) 和高精度/精度的样 (水,玉米,大米,大豆,土壤).
结论:
- 成功生成了广泛的pAbs和mAb来对抗常见的Bt Cry毒素.
- 建立了强大的DAS-ELISA协议,用于广泛检测八种Bt Cry毒素亚型.
- 开发的基于抗体的DAS-ELISAs为监测各种食品和环境样本中的Crytoxin残留物提供了一个有前途的工具.
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