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A rGO–DNAzyme assisted fluorescence method for sensitive RNase A activity assay and natural compound screening
Analytical Methods ( IF 2.7 ) Pub Date : 2021-08-20 , DOI: 10.1039/d1ay01053k
Yan Qin 1, 2 , Ying Long 1 , Ting Zhou 1 , Ruxin Luo 1 , Chunyi Tong 1 , Qian Xie 2 , Wei Wang 2 , Bin Liu 1
Affiliation  

As a key regulator of human physiology and metabolic processes, ribonuclease (RNase) A can be used as an important biomarker for predicting human disease occurrence. Hence, establishing sensitive methods for tracking RNase A activity in vitro and in living cells is of great importance. Herein, we present a convenient fluorescence method assisted by reduced graphene oxide (rGO) and DNAzyme mediated fluorescence signal release for RNase A assay. The fluorescence change of the new method showed a positive linear relation with RNase A concentration in the range from 0.5 pg μL−1 to 1 ng μL−1 with a detection limit of 0.089 pg μL−1. By using this method to screen the effector of RNase A from natural compounds, the natural compound of B6 was found to stimulate RNase A activity in vitro and in vivo, the result of which was supported by the real-time imaging of RNase A in living cells. In summary, this fluorescence method with high sensitivity and specificity provides an alternative for RNase A activity assay and effector screening.

中文翻译:

用于灵敏的 RNase A 活性测定和天然化合物筛选的 rGO-DNAzyme 辅助荧光方法

作为人类生理和代谢过程的关键调节因子,核糖核酸酶 (RNase) A 可作为预测人类疾病发生的重要生物标志物。因此,建立用于在体外和活细胞中跟踪 RNase A 活性的敏感方法非常重要。在此,我们提出了一种方便的荧光方法,由还原氧化石墨烯 (rGO) 和 DNAzyme 介导的荧光信号释放辅助,用于 RNase A 测定。新方法的荧光变化与 RNase A 浓度呈正线性关系,范围为 0.5 pg μL -1至 1 ng μL -1,检测限为 0.089 pg μL -1. 通过使用这种方法从天然化合物中筛选 RNase A 的效应物,发现 B6 的天然化合物在体外体内刺激 RNase A 活性,该结果得到了活体RNase A 实时成像的支持。细胞。总之,这种具有高灵敏度和特异性的荧光方法为 RNase A 活性测定和效应子筛选提供了一种替代方法。
更新日期:2021-09-02
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