自校准的比度DNAAptamer探头用于活细胞中的定量ATP成像
Yunsong Xu1, Kunihiko Morihiro1, Rui Cong1
1Department of Chemistry and Biotechnology, The University of Tokyo, Tokyo, Japan.
Chemistry (Weinheim an der Bergstrasse, Germany)
|January 14, 2026
概括
我们开发了一种新的DNA传感器,可以准确测量细胞的能量货币 - - 腺三酸盐 (ATP). 这种可靠的传感器可以将癌细胞与正常细胞区分开来,有助于诊断疾病.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 医学诊断 医学诊断 医学诊断
背景情况:
- 精确监测细胞内腺三酸盐 (ATP) 对于了解细胞代谢和疾病至关重要.
- 现有的光传感器由于高ATP度和可变的探头吸收而面临挑战.
- 当前的DNA吸管探头提供了选择性,但往往缺乏内部校准或在比度设计中显示有限的信号变化.
研究的目的:
- 为可靠的细胞内ATP监测开发一个比度DNA双重传感器.
- 克服现有传感器的局限性,包括信号变化差和内部校准缺乏.
- 为了能够准确地对活细胞中的ATP水平进行成像,并将癌细胞与正常细胞区分开来.
主要方法:
- 使用Cy5标记的ATP吸收体和酸 (TO) 标记的ECHO探针设计了一个比度DNA双重传感器.
- 设计了传感器,在ATP结合时释放一个记者链,导致TO光减少,而Cy5信号保持不变.
- 包含一个聚胺间隔器,以防止TO和Cy5之间的Förster共振能量转移 (FRET),从而实现稳定的Cy5/ECHO比率.
主要成果:
- 传感器在生理ATP度上表现出强大的性能,具有高核酸选择性和血清稳定性.
- 活细胞流细胞计和共聚焦成像显示,与正常纤维细胞相比,癌细胞的Cy5/ECHO比率显著更高.
- 传感器表现出最小的细胞毒性,证实其适用于活细胞应用.
结论:
- 开发的内部自我校准的aptamer传感器为细胞内ATP成像提供了一个可靠的平台.
- 这种传感器有效地根据它们的ATP水平将癌细胞与正常细胞区分开来.
- 这项技术对推进癌症诊断和研究细胞能量代谢具有前景.
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