通过基于新型DNA分裂酶纳米结构的信号关闭色度纳米生物传感器对微RNA进行双重检测
Neda Asadollahi1, Mahdi Rahaie2, Fatemeh Moradifar1
1Department of Life Science Engineering, Faculty of New Sciences and Technologies, University of Tehran, Tehran, 14399-57131, Iran.
Journal of fluorescence
|August 12, 2024
概括
这项研究引入了一种用于早期发现乳腺癌的新型纳米生物传感器. 它同时识别了两个关键的微RNA (miR-21和miR-155),使用G-四重复结构进行简单的色度测试.
科学领域:
- 生物医学工程 生物医学工程
- 纳米技术纳米技术
- 分子诊断学 分子诊断学
背景情况:
- 乳腺癌是女性癌症死亡的主要原因,需要早期检测以改善生存率.
- 乳腺癌的早期诊断至关重要,特别是对于20-59岁的女性来说,以提高治疗效率.
- 特定的微RNA,如miR-21和miR-155,与乳腺癌的发展和进展有关.
研究的目的:
- 开发一种新的纳米生物传感器,用于同时早期检测乳腺癌中的miR-21和miR-155.
- 为了利用G-四重复 (G4) DNA结构具有类似过氧化酶的活性,用于色度检测方法.
- 为乳腺癌监测建立一种简单,快速,经济高效的诊断技术.
主要方法:
- 使用两个探针 (p1,p2) 的纳米生物传感器被设计成在与目标微RNA结合后形成DNA-G4结构.
- DNA-G4结构表现出类似过氧化酶的活性,催化TMB的氧化,产生蓝色.
- 实施了一个"信号关闭"机制:与microRNAs的杂交阻止了G4的形成和颜色的发展.
主要成果:
- 纳米生物传感器成功地通过色度反应同时检测到miR-21和miR-155.
- 该方法证明了2-10nM的线性响应范围.
- 检测极限被确定为缓冲液中的0.43nM,血液中的0.54nM和尿液中的0.62nM,R2=0.98.
结论:
- 开发的纳米生物传感器为与乳腺癌相关的microRNAs的同时和早期检测提供了一个有前途的方法.
- 这种色度测试为乳腺癌诊断和监测提供了一种简单,快速和经济高效的方法.
- 纳米生物传感器在缓冲器,血液和尿液样本中的有效性突显了其临床应用的潜力.
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