A Split G-Quadruplex and Graphene Oxide-Based Low-Background Platform for Fluorescence Authentication of Pseudostellaria heterophylla
A label-free split G-quadruplex and graphene oxide (GO)-based fluorescence platform has been designed to distinguish Pseudostellaria heterophylla (PH) from its adulterants based on the differences in their nrDNA ITS sequences. Herein, GO has been first introduced to capture G-rich probes with 2:2 sp...
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doaj-7eeacb2684e64a22ab7c711ce036a0822020-11-25T01:30:48ZengMDPI AGSensors1424-82202014-12-011412229712298110.3390/s141222971s141222971A Split G-Quadruplex and Graphene Oxide-Based Low-Background Platform for Fluorescence Authentication of Pseudostellaria heterophyllaZhenzhu Zheng0Juan Hu1Zhaodong He2Institute of Drug Research, Fujian Academy of Traditional Chinese Medicine, Fuzhou 350003, ChinaInstitute of Drug Research, Fujian Academy of Traditional Chinese Medicine, Fuzhou 350003, ChinaInstitute of Drug Research, Fujian Academy of Traditional Chinese Medicine, Fuzhou 350003, ChinaA label-free split G-quadruplex and graphene oxide (GO)-based fluorescence platform has been designed to distinguish Pseudostellaria heterophylla (PH) from its adulterants based on the differences in their nrDNA ITS sequences. Herein, GO has been first introduced to capture G-rich probes with 2:2 split mode and then decrease the background signal. As T-DNA exists, the probes leave the GO surface to form double-stranded structures followed by the formation of the overhanging G-rich sequence into a G-quadruplex structure, which combines quinaldine red specifically to produce a strong fluorescence signal. In addition, this strategy allows detection of T-DNA in a wide range of concentrations from 1.0 × 10−8 to 2.0 × 10−6 mol·L−1 with a detection limit of 7.8 × 10−9 mol·L−1. We hope that the split G-quadruplex/GO platform can be utilized to further develop gene identification sensors in Traditional Chinese Medicine or other analysis areas.http://www.mdpi.com/1424-8220/14/12/22971split G-quadruplexgraphene oxidefluorescencePseudostellaria heterophylla |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Zhenzhu Zheng Juan Hu Zhaodong He |
spellingShingle |
Zhenzhu Zheng Juan Hu Zhaodong He A Split G-Quadruplex and Graphene Oxide-Based Low-Background Platform for Fluorescence Authentication of Pseudostellaria heterophylla Sensors split G-quadruplex graphene oxide fluorescence Pseudostellaria heterophylla |
author_facet |
Zhenzhu Zheng Juan Hu Zhaodong He |
author_sort |
Zhenzhu Zheng |
title |
A Split G-Quadruplex and Graphene Oxide-Based Low-Background Platform for Fluorescence Authentication of Pseudostellaria heterophylla |
title_short |
A Split G-Quadruplex and Graphene Oxide-Based Low-Background Platform for Fluorescence Authentication of Pseudostellaria heterophylla |
title_full |
A Split G-Quadruplex and Graphene Oxide-Based Low-Background Platform for Fluorescence Authentication of Pseudostellaria heterophylla |
title_fullStr |
A Split G-Quadruplex and Graphene Oxide-Based Low-Background Platform for Fluorescence Authentication of Pseudostellaria heterophylla |
title_full_unstemmed |
A Split G-Quadruplex and Graphene Oxide-Based Low-Background Platform for Fluorescence Authentication of Pseudostellaria heterophylla |
title_sort |
split g-quadruplex and graphene oxide-based low-background platform for fluorescence authentication of pseudostellaria heterophylla |
publisher |
MDPI AG |
series |
Sensors |
issn |
1424-8220 |
publishDate |
2014-12-01 |
description |
A label-free split G-quadruplex and graphene oxide (GO)-based fluorescence platform has been designed to distinguish Pseudostellaria heterophylla (PH) from its adulterants based on the differences in their nrDNA ITS sequences. Herein, GO has been first introduced to capture G-rich probes with 2:2 split mode and then decrease the background signal. As T-DNA exists, the probes leave the GO surface to form double-stranded structures followed by the formation of the overhanging G-rich sequence into a G-quadruplex structure, which combines quinaldine red specifically to produce a strong fluorescence signal. In addition, this strategy allows detection of T-DNA in a wide range of concentrations from 1.0 × 10−8 to 2.0 × 10−6 mol·L−1 with a detection limit of 7.8 × 10−9 mol·L−1. We hope that the split G-quadruplex/GO platform can be utilized to further develop gene identification sensors in Traditional Chinese Medicine or other analysis areas. |
topic |
split G-quadruplex graphene oxide fluorescence Pseudostellaria heterophylla |
url |
http://www.mdpi.com/1424-8220/14/12/22971 |
work_keys_str_mv |
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