根据MoS2@AuNPs组装双作为生物探测器,具有显著的双信号放大,对致病原体抗原进行敏感的电压测量免疫传感器
Zongmei Zheng1, Mingyang Wang1, Jinlong Yuan1
1Institute for Chemical Biology & Biosensing, College of Life Sciences, Qingdao University, 308 Ningxia Road, Qingdao, 266071, China.
Analytica chimica acta
|April 24, 2025
概括
这项研究引入了一种新的电化学免疫传感器,使用探头快速和灵敏地检测SARS-CoV-2尖端蛋白. 这种具有成本效益的测定方法为早期诊断病毒感染提供了更好的稳定性和灵敏性.
科学领域:
- 生物传感器技术技术
- 在诊断中使用纳米材料.
- 病毒检测 病毒检测
背景情况:
- 准确的病毒鉴定对于及时治疗和预防疾病传播至关重要.
- 目前的病毒抗原检测方法通常依赖于抗体,其稳定性和灵敏度受到限制.
- 类药物比抗体具有优势,包括更低的成本,更小的尺寸,以及用于生物传感应用的增强稳定性.
研究的目的:
- 开发一种高度敏感和稳定的电化学免疫传感器,用于使用探针检测SARS-CoV-2尖端蛋白 (SP).
- 为了研究双探测系统的有效性,该系统与双信号放大集成,用于增强检测.
- 为早期诊断SARS-CoV-2建立一个具有成本效益和可靠的平台.
主要方法:
- 使用两种特定的酸,Pi和FK11,通过菌体显示识别用于与SARS-CoV-2SP结合,构建了一个电压计免疫传感器.
- 修改了MoS2@AuNPs电极与Pi进行捕获,随后与FK11显示菌体进行识别,随后使用抗M13-HRP进行放大.
- 采用电化学催化 H2O2 减少的过氧化酶 (HRP) 在修改电极用于信号生成.
主要成果:
- 开发的免疫传感器证明了SARS-CoV-2 SP的广泛线性检测范围为0.1-5000 pg/mL,低检测极限为0.074 pg/mL.
- 传感器表现出极好的选择性,批次可重复性和稳定性.
- 成功检测到10个传导单位/毫升的SARS-CoV-2伪病毒,展示了其对现实世界的应用的潜力.
结论:
- 这项工作介绍了第一个基于双探针的三明治型电化学免疫传感器,用于检测SARS-CoV-2的双信号放大.
- 开发的生物传感器为早期病毒诊断提供了基于抗体的方法的经济有效,稳定和敏感的替代方案.
- 灵活和模块化设计策略可以扩展到为各种应用程序创建其他生物传感器.
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