捕捉和显示免疫试验作为数字生物标志物检测的可访问平台
bioRxiv : the preprint server for biology
|February 9, 2026
概括
我们为普通实验室开发了一种基于纳米膜的可访问的捕捉和显示免疫测试 (CAD-IA). 这种数字免疫测试使用标准设备检测具有高灵敏度的生物标志物,克服了采用障碍.
科学领域:
- 生物标志物检测检测生物标志物检测
- 纳米技术在诊断中的应用
- 免疫测试的发展.
背景情况:
- 数字免疫试验对低丰度生物标志物具有很高的灵敏度,但由于成本和复杂性而面临采用障碍.
- 目前的商业和实验室规模的数字免疫测试平台通常很昂贵或需要专门的设备和工作流程.
研究的目的:
- 引入一种可访问的基于纳米膜的捕捉和显示免疫试验 (CAD-IA),适合常规实验室环境.
- 用标准实验室设备展示CAD-IA对使用标准实验室设备进行敏感和可量化的生物标志物检测的能力.
主要方法:
- 开发了使用超薄化膜和光纳米粒子的捕捉和显示免疫试验 (CAD-IA).
- 利用管管驱动过来捕获膜孔内的纳米粒子,从而创建光学隔离的热点.
- 通过共聚焦显微镜在μSiM-DX平台上生成数字信号的量化免疫复合体形成.
主要成果:
- 对于TBI生物标志物S100B,CAD-IA在至少两个数量级上展示了一致的数字输出和线性量化.
- 该试验在血清矩阵中保持了线性,并通过提拉胺信号放大 (TSA) 达到0.02μg/mL的检测极限 (LoD).
- μSiM-DX 平台是用经济高效的量产组件手工组装的.
结论:
- CAD-IA为常见的实验室环境提供了一种全新的,可访问的数字免疫测试方法.
- 这种方法克服了数字免疫测试采用的实际障碍,使敏感生物标志物的检测成为可能.
- 概念验证证明了在可访问的环境中进行临床相关诊断的潜力.
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