通过使用细菌应激响应生物传感器检测食品安全危害引起的细胞损伤
Ruiqi Li1,2, Manzhuan Lou2,3, Wei He4
1State Key Laboratory of Bioreactor Engineering, School of Biotechnology, East China University of Science and Technology, Shanghai 200237, China.
Biosensors
|October 28, 2025
概括
研究人员使用大肠杆菌 (Escherichia coli) 开发了全细胞生物传感器,以检测特定的食品安全危害. 这些敏感的生物传感器可以区分DNA损伤,氧化,蛋白质毒性和膜应激,为食品安全监测提供了具有成本效益的工具.
科学领域:
- 微生物学 微生物学
- 生物技术是生物技术.
- 食品科学 食品科学 食品科学
背景情况:
- 食品安全危害会导致细胞损伤,包括DNA损伤,氧化应激,蛋白质毒性应激和膜破坏.
- 传统的毒性测定是资源密集型的,不能区分这些损害类型,阻碍了有针对性的风险减轻.
- 开发特定的生物传感器对于理解有毒反应和改善食品安全策略至关重要.
研究的目的:
- 构建一个由大肠杆菌全细胞生物传感器组成的面板,能够区分由食品安全危害引起的不同类别的细胞损伤.
- 开发一种灵敏且具有成本效益的工具,用于实际监测食品安全.
主要方法:
- 一个优化的基于ReCA-LexA的生物传感器被设计用于检测DNA损伤.
- 系统的促进体查确定了氧化,蛋白毒性和膜应激生物传感器的有效模块 (Pfpr,PkatG,PgrpE,PfabA).
- 生物传感器的特异性和灵敏性使用模型毒素和现实世界样本进行了评估.
主要成果:
- 该DNA损伤生物传感器显示了36.6倍的光感应和高特异性.
- 氧化,蛋白质毒性和膜应激生物传感器显示对模型毒性物质的剂量依赖反应.
- DNA损伤生物传感器实现了与HPLC相比的诺夫洛克萨检测极限,即使在牛奶中也是如此.
结论:
- 开发的全细胞生物传感器面板提供了一种多功能,具有成本效益和敏感的方法,用于评估食品安全危害的各种细胞损伤.
- 这些生物传感器可以有效地区分不同类型的细胞损伤,为毒理反应提供宝贵的见解.
- 该研究强调了这些生物传感器在实际和高效的食品安全监测应用中的潜在实用性.
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