使用表面增强的拉曼光谱学对阿巴和其与阿弗拉托克辛B1的相互作用进行了符合性研究
Marjan Majdinasab1, Aicha Azziz2, Gunnar Klös3
1Department of Food Science and Technology, School of Agriculture, Shiraz University, Shiraz 71441-65186, Iran; IMMM - UMR 6283 CNRS, Le Mans Université, Avenue Olivier Messiaen, 72085 Le Mans, Cedex 9, France.
概括
这项研究开发了一种无标签检测方法,使用DNA吸收体和表面增强拉曼光谱 (SERS) 来量化阿弗拉托辛B1 (AFB1). 该试验对检测AFB1具有很高的灵敏度,这对食品安全至关重要.
科学领域:
- 生物化学 生化学
- 分析化学 分析化学
- 纳米技术 纳米技术
背景情况:
- 体是基于核酸的识别元素,在体结合时会发生构造变化.
- 非洲毒素B1 (AFB1) 是一种有毒和致癌的真菌毒素,需要敏感的检测方法.
- 表面增强拉曼光谱 (SERS) 为无标签的分子检测提供了一个敏感的平台.
研究的目的:
- 开发一种无标签的SERS测定方法,用于使用DNA体检测AFB1的敏感检测.
- 通过使用SERS. 来研究AFB1结合后DNA体的构造变化.
- 建立基于SERS信号变化的AFB1检测量的定量方法.
主要方法:
- 在金纳米颗粒 (AuNPs) 上制造自组装单层醇结合的DNA吸附体.
- 利用SERS探测结合到AFB1.1时DNA体的构造变化.
- 监测特征拉曼波段,特别是氨酸波段在734厘米-1 (I734) 和OPO波段在1004厘米-1 (I1004).
主要成果:
- 结合AFB1诱导的阿巴体形状变化,导致腺素带的拉曼强度降低 (I734).
- I734的下降与AFB1度相关,从而可以进行定量测量.
- 该试验实现了广泛的线性范围 (0.1-5000 pg mL-1) 和低检测极限 (LOD) 0.24 pg mL-1的I734.
结论:
- 开发的基于aptamer的SERS检测方法为AFB1检测提供了一种敏感且无标签的方法.
- 通过SERS有效地监测DNA体的形状变化,以量化分析物.
- 这种方法有望实现快速准确的食品安全测试和真菌毒素监测.
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