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Metal-Free Photoinduced Atom Transfer Radical Polymerization for Highly Sensitive Detection of Lung Cancer DNA.
Chemistry - A European Journal ( IF 3.9 ) Pub Date : 2019-11-14 , DOI: 10.1002/chem.201904271
Qianrui Liu 1 , Lihe Jian 2 , Ruiqian Liu 1 , Huaixia Yang 2 , Jinming Kong 1 , Xueji Zhang 3
Affiliation  

Convenient and sensitive detection of biomolecules is of great significance to disease diagnosis. In this work, a metal-free photoinduced atom transfer radical polymerization (photoATRP) by a reductive quenching pathway as a novel strategy is applied to achieve lung cancer DNA detection. Thiolated PNA is exploited to specifically recognize target DNA, and the initiator of photoATRP is linked to the electrode surface via phosphate-Zr4+ -carboxylate. Under the excitation of blue light, the reductive quenching pathway is activated with eosin Y (EY) as photoredox catalyst and N,N,N',N'',N'-pentamethyldiethylenetriamine (PMDETA) as electron donor, and numerous polymeric chains are formed. Under optimal conditions, the linear range of this strategy is from 0.1 pm to 10 nm (R2 =0.989) with a limit of detection (LOD) of 1.4 fm (14 zmol in 10 μL). The variety of possible light sources for photoATRP and simple operation endow this biosensor with great potential for practical applications.

中文翻译:

无金属的光诱导原子转移自由基聚合用于肺癌DNA的高灵敏度检测。

方便,灵敏地检测生物分子对疾病诊断具有重要意义。在这项工作中,通过还原淬灭途径将无金属的光诱导原子转移自由基聚合(photoATRP)作为一种新策略,用于实现肺癌DNA检测。利用硫醇化的PNA特异性识别靶DNA,photoATRP的引发剂通过磷酸Zr4 +-羧酸盐连接到电极表面。在蓝光的激发下,曙红Y(EY)作为光氧化还原催化剂,N,N,N',N'',N'-五甲基二亚乙基三胺(PMDETA)作为电子给体活化还原淬灭途径,并且有许多聚合物链形成。在最佳条件下,该策略的线性范围是从0.1 pm到10 nm(R2 = 0.989),检出限(LOD)为1。4 fm(10μL中的14 zmol)。用于photoATRP的各种可能的光源和简单的操作使该生物传感器在实际应用中具有巨大的潜力。
更新日期:2020-01-23
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