视觉和电化学检测let-7a:一种瘤抑制剂和生物标志物
Zhen Song1, Qiang-Yan Zhang1, Jia-Jing Li1
1Department of Pharmaceutical Analysis, China Pharmaceutical University, Nanjing 210009, P. R. China.
Journal of medicinal chemistry
|May 29, 2023
概括
这项研究提出了一种敏感的方法来检测let-7a,这是一种微RNA,对抑制癌症至关重要. 这种新技术利用杂交连锁反应与侧向流量检测或电化学阻抗光谱相结合,用于准确检测癌症生物标志物.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 分析化学 分析化学
背景情况:
- Let-7a微RNA是癌细胞中表达较低的生物标志物,对瘤抑制具有重要意义.
- 对let-7a的敏感检测方法对于癌症诊断和治疗策略至关重要.
- 杂交连锁反应 (HCR) 为放大微RNA信号提供了一个有前途的平台.
研究的目的:
- 为Let-7a.开发简单和灵敏的检测方法.
- 探索let-7a启动的HCR的实用性,以通过侧向流量测试 (LFA) 和电化学阻抗光谱 (EIS) 进行后续检测.
- 为let-7a.建立一个定量检测范围和极限.
主要方法:
- 使用let-7a和两个发针启动器 (H1和H2) 启动HCR.
- 检测HCR产品使用LFA与生物改性H1 (生物-H1) 和自由H2.
- 使用H1'-AuNP修饰的电极进行电化学检测,用于在HCR之后测量阻抗变化 (ΔRct).
主要成果:
- LFA显示T线上的颜色变化随着let-7a度下降而增加.
- 电化学方法检测了let-7a在10.0 fM到1.0 nM的范围内.
- 电化学方法实现了let-7a的4.2 fM的检测极限.
结论:
- 开发的基于HCR的方法为let-7a检测提供了敏感和简单的方法.
- 与HCR相结合的LFA和EIS都有效量化let-7a,EIS显示了较低的检测极限.
- 这些方法有可能促进癌症诊断和监测治疗反应.
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