Design of DNA nanostructure-based interfacial probes for the electrochemical detection of nucleic acids directly in whole blood.
Design of DNA nanostructure-based interfacial probes for the electrochemical detection of nucleic acids directly in whole blood.
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基于 DNA 纳米结构的界面探针设计,用于直接电化学检测全血中的核酸
DOI:
10.1039/c7sc04663d
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发表时间:
2018-01-28
期刊:
影响因子:
8.4
通讯作者:
Li G
中科院分区:
文献类型:
--
作者:
Li C;Hu X;Lu J;Mao X;Xiang Y;Shu Y;Li G
A novel DNA nanostructure-based electrochemical (E-nanoDNA) sensor is proposed for one-step reagentless detection of biomolecules in flowing samples. Here we report a robust and sensitive DNA nanostructure-based electrochemical (E-nanoDNA) sensor that utilizes tetrahedral DNA nanostructures (TDNs) as an interfacial probe to detect biomolecules in a single-step procedure. In this study, we have firstly demonstrated that the use of TDNs can significantly suppress electrochemical background signals compared to traditional linear DNA probes upon introduction of base mismatches in the edges of TDNs. After further optimization of the two functional strands in the TDNs, quantitative, one-step detection of DNA can be achieved in the picomolar range in less than 10 min, and directly in complex media. Moreover, the baseline drift of this biosensor can be greatly decreased even after several hours in flowing whole blood in vitro, which suggests that the sensor holds potential to be employed in live animals. Furthermore, through replacing functional strands with aptamers or other DNA elements, this E-nanoDNA sensor can be easily used to probe various analytes, broadening the application range of the proposed sensor.
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影响因子:
7.4
作者:
Cash, Kevin J.;Heeger, Alan J.;Plaxco, Kevin W.;Xiao, Yi
通讯作者:
Xiao, Yi
影响因子:
12.6
作者:
Wang, J
通讯作者:
Wang, J
影响因子:
15
作者:
Cash KJ;Ricci F;Plaxco KW
通讯作者:
Plaxco KW
影响因子:
15
作者:
Xiao, Yi;Lou, Xinhui;Uzawa, Takanori;Plakos, Kory J. I.;Plaxco, Kevin W.;Soh, H. Tom
通讯作者:
Soh, H. Tom
影响因子:
15
作者:
Xiao, Yi;Qu, Xiaogang;Heeger, Alan J.
通讯作者:
Heeger, Alan J.