Telomere G-triplex lights up Thioflavin T for RNA detection: new wine in an old bottle.

Telomere G-triplex lights up Thioflavin T for RNA detection: new wine in an old bottle.
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端粒 G-三链体点亮硫磺素 T 用于 RNA 检测:旧瓶装新酒

DOI:
10.1007/s00216-022-04180-7
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发表时间:
2022-08
影响因子:
4.3
通讯作者:
Liu, Maili
Liu, Maili
中科院分区:
化学2区
文献类型:
--
作者:
Qin, Shanshan;Chen, Xuliang;Xu, Zhichen;Li, Tao;Zhao, Shuhong;Hu, Rui;Zhu, Jiang;Li, Ying;Yang, Yunhuang;Liu, Maili

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尽管端粒G-四链体已被广泛研究并用于开发各种生物传感器,但关于端粒G-三链体(ht-G3)的特征和功能的报道很少。我们在此报道ht-G3点亮硫磺素T(ThT),并通过引入靶循环策略建立用于RNA检测的灵敏生物传感平台。筛选出ht-G3促进ThT产生强荧光的最佳条件。因此,成功地设计了一种基于ht-G3的分子信标,针对SARS-CoV-2 N基因的相应RNA序列。对非扩增RNA靶标的灵敏度达到0.01 nM,比传统的基于ThT的方法提高了100倍。我们相信这种基于ht-G3/ThT的无标记策略可以广泛应用于RNA检测。在线版本包含补充材料,可通过10.1007/s 00216 -022-04180-7获得。
Few reports are found working on the features and functions of the human telomere G-triplex (ht-G3) though the telomere G-quadruplex has been intensely studied and widely implemented to develop various biosensors. We herein report that ht-G3 lights up Thioflavin T (ThT) and establish a sensitive biosensing platform for RNA detection by introducing a target recycling strategy. An optimal condition was selected out for ht-G3 to promote ThT to generate a strong fluorescence. Accordingly, an ht-G3-based molecular beacon was successfully designed against the corresponding RNA sequence of the SARS-CoV-2 N-gene. The sensitivity for the non-amplified RNA target achieves 0.01 nM, improved 100 times over the conventional ThT–based method. We believe this ht-G3/ThT–based label-free strategy could be widely applied for RNA detection. The online version contains supplementary material available at 10.1007/s00216-022-04180-7.
开始和结束:侧翼核苷酸诱导平行的 G-四链体拓扑
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