全球人工尿路生物标记探测器,由一个Aptamer-DNAzyme-Nanozyme结构启用
Yi Xiao1,2, Jia Hui Wong3, Nan Gao4
1School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, Singapore 637457, Singapore.
Nano letters
|July 4, 2025
概括
研究人员开发了一种新的人工尿路生物标记探针 (AUBP) 用于阿尔茨海默病 (AD) 诊断. 这种创新型探针可以检测尿液中的粉样β oligomers (AβO),提供一种高度敏感和早期的诊断方法.
科学领域:
- 生物标志物发现和诊断
- 纳米技术在医学中的应用
- 分子诊断学 分子诊断学
背景情况:
- 人工尿路生物标志物探针 (AUBPs) 是新兴的诊断工具,但仅限于具有催化或高反应性的生物标志物.
- 阿尔茨海默病 (AD) 的早期诊断至关重要,并且通常依赖于检测像粉样β oligomers (AβO) 这样的生物标志物.
研究的目的:
- 为AUBP提供一个一般的模块化设计,适用于更广泛的生物标志物.
- 开发和演示一个AUBP用于敏感和特定的循环AβO的检测,用于早期AD诊断.
主要方法:
- 设计了一个模块化的AUBP集成aptamer用于目标识别,DNAzyme用于信号传导,和纳米酶用于信号放大.
- 开发了一种对粉样β oligomers (AβO) 有反应的概念证明AUBP.
- 在纳米探针注射后利用色度分析尿液分析来检测循环中的AβO水平.
主要成果:
- 开发的AUBP专门和灵敏地检测出循环中的AβO.
- 成功地将AD小鼠与健康对照区分开来,其低检测极限约为2.8 pg/mL.
- 与传统的酶相关免疫吸收试验 (ELISA) 相比,获得了大约67倍的灵敏度.
结论:
- 新型模块化AUBP设计扩大了尿路生物标志物检测的适用性.
- 这种AUBP方法可以通过尿液分析对阿尔茨海默病的高度敏感和早期诊断.
- 级联信号放大,脏过丰富和纳米酶催化有助于提高灵敏度.
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