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Fluorometric determination of the activity of the biomarker terminal deoxynucleotidyl transferase via the enhancement of the fluorescence of silver nanoclusters by in-situ grown DNA tails
Microchimica Acta ( IF 5.3 ) Pub Date : 2019-03-13 , DOI: 10.1007/s00604-019-3288-x
Bao-Zhu Chi 1 , Chen-Lu Wang 1 , Zhi-Qiao Wang 1 , Ting Pi 1 , Xiao-Li Zhong 1 , Chao-Qun Deng 1 , Yu-Chuan Feng 1 , Zhi-Mei Li 1
Affiliation  

AbstractThe activity of terminal deoxynucleotidyl transferase (TdTase) is a biomarker for routine diagnosis of acute leukemia. A method has been developed for the determination of TdTase activity. It is based on the use of silver nanoclusters (AgNCs) whose yellow fluorescence is enhanced by an in-situ grown DNA tail of TdTase-polymerized and guanine-rich DNA at the 3′ end of a hairpin DNA. The fluorescence, best measured at excitation/emission peaks of 530/585 nm, increases linearly in the 1 to 35 mU mL−1 TdTase activity range. The detection limit is 0.8 mU mL−1. The method is cost-efficient, selective and convenient. It integrates enhancement of the fluorescence of AgNCs and target recognition into a single process. Graphical abstractSchematic presentation of a method for determination of TdTase activity. It is based on AgNCs fluorescence enhanced by in-situ grown TdTase-polymerized G-rich DNA tail. The method integrates AgNCs fluorescence enhancement and the target recognition into a single process.

中文翻译:

通过原位生长的 DNA 尾部增强银纳米团簇的荧光,荧光测定生物标志物末端脱氧核苷酸转移酶的活性

摘要末端脱氧核苷酸转移酶(TdTase)的活性是急性白血病常规诊断的生物标志物。已开发出一种测定 TdTase 活性的方法。它基于银纳米簇 (AgNC) 的使用,其黄色荧光通过在发夹 DNA 3' 端的 TdTase 聚合和富含鸟嘌呤的 DNA 的原位生长 DNA 尾部增强。荧光最好在 530/585 nm 的激发/发射峰测量,在 1 到 35 mU mL-1 TdTase 活性范围内线性增加。检测限为 0.8 mU mL-1。该方法具有成本效益、选择性和方便性。它将 AgNCs 的荧光增强和目标识别整合到一个过程中。图形摘要示意图展示了一种测定 TdTase 活性的方法。它基于通过原位生长的 TdTase 聚合的富含 G 的 DNA 尾部增强的 AgNCs 荧光。该方法将 AgNCs 荧光增强和目标识别集成到一个过程中。
更新日期:2019-03-13
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