甲蓝染色单链DNA适应体作为一种高效的电子交换机,用于几乎无反应物的外体检测:一只老狗有了新的技巧
Yanhong Wang1, Han Jie1, Huajuan Ye1
1The Higher Educational Key Laboratory for Nano Biomedical Technology of Fujian Province, School of Pharmacy, Fujian Medical University, Fuzhou 350122, China.
Analytical chemistry
|December 1, 2023
概括
这项研究引入了一种新型的电化学感应传感器,用于使用甲蓝和DNA感应器检测瘤外体. 该传感器为临床诊断提供了高灵敏度和成本效益,将癌症患者与健康个体区分开来.
科学领域:
- 生物医学工程 生物医学工程
- 纳米技术纳米技术
- 分析化学 分析化学
背景情况:
- 电化学生物传感器对于临床诊断至关重要,但需要在方便性,灵敏性和成本效益方面进行改进.
- 来自瘤的外体是早期癌症检测的有希望的生物标志物.
- 现有的检测方法往往缺乏所需的灵敏度或过于复杂,无法用于常规的临床使用.
研究的目的:
- 开发一种高灵敏性和成本效益的电化学感应传感器,用于检测EpCAM阳性外体.
- 为了利用甲基蓝 (MB) 和DNA吸收体之间的相互作用来进行信号传导.
- 为了展示aptasensor在非小细胞肺癌 (NSCLC) 临床诊断方面的潜力.
主要方法:
- 在金电极上使用MB染色的抗EpCAM吸收器 (SYL3C) 构建了一种电化学吸收传感器.
- 利用SYL3C在与EpCAM阳性外体结合时的形状变化来改变MB的电化学信号.
- 分析了临床血清样本,以区分NSCLC患者与健康对照.
主要成果:
- 在没有信号放大的情况下,实现了234个粒子mL-1的低检测极限 (LOD).
- 由于阻碍了MB可访问性和电子转移,在外体结合时,电化学信号显著下降.
- 通过使用临床血清样本,成功区分了NSCLC患者和健康个体.
结论:
- 开发的吸食传感器提供了一个灵敏,方便和具有成本效益的对外体检测平台.
- MB-aptamer相互作用提供了一个独特而有效的信号传导机制.
- 由于EpCAM的广泛表达,这种食感传感器在早期癌症诊断和潜在的其他瘤类型方面显示出显著的希望.
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