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Liu Y, Xu J, Wu Z, Cai Y, Zhao Z, Qiu J. Development of a fluorescent DNA sensor for dual detection of heavy metal ions utilising DAPI in distinct buffers. Food Chem 2024; 451:139390. [PMID: 38653103 DOI: 10.1016/j.foodchem.2024.139390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Revised: 04/12/2024] [Accepted: 04/14/2024] [Indexed: 04/25/2024]
Abstract
The DNA-based biosensor utilises a thymine/guanine(T/G)-rich ODN-4 scaffold with 4',6-diamidino-2-phenylindole(DAPI) as a fluorescent emissary to monitor mercury/lead(Hg(II)/Pb(II)) ions simultaneously. Key to its bifocal detection capability is the twin unbound cytosine(C) bases strategically bridging the G-quadruplex and T-rich sequences, enabling their synergistic interplay. It facilitates the recognition of Hg(II)/Pb(II) ions, characterised by high specificity, and effectively mitigates interference from silver(Ag(I)). The G-quadruplex, guided by the C bases, induces a conformational transition in T-Hg(II)-T complexes, resulting in intense fluorescence. Pb(II) causes a spatial shift in the G-quadruplex, relaxing the T-Hg(II)-T base pairs and attenuating the fluorescence signal. The ODN-4 exhibits a robust, linear correlation with Hg(II) concentration (4.09 nmol/L to 1000 nmol/L) and Pb(II) concentration (3.22 nmol/L to 5 μmol/L). Recovery rates in milk, tap water, and rice water specimens with both ions validate method accuracy (Hg(II): 95.19% to 104.68%, Pb(II): 98.20% to 103.46%). It holds promising prospects for practical food analysis.
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Affiliation(s)
- Yuxin Liu
- Zhejiang Key Laboratory of Silkworm Bioreactor and Biomedicine, College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Jiaxuan Xu
- Zhejiang Key Laboratory of Silkworm Bioreactor and Biomedicine, College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Ziyi Wu
- Zhejiang Key Laboratory of Silkworm Bioreactor and Biomedicine, College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Yule Cai
- Zhejiang Key Laboratory of Silkworm Bioreactor and Biomedicine, College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Zihan Zhao
- Zhejiang Key Laboratory of Silkworm Bioreactor and Biomedicine, College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Jieqiong Qiu
- Zhejiang Key Laboratory of Silkworm Bioreactor and Biomedicine, College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Hangzhou 310018, China.
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Zhu W, Li Z, Dai L, Yang W, Li Y. Label-free fluorescence detection of alkaline phosphatase activity using a G-triplex based dumbbell-shaped probe. ANAL SCI 2023; 39:297-302. [PMID: 36536167 DOI: 10.1007/s44211-022-00241-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Accepted: 11/24/2022] [Indexed: 12/24/2022]
Abstract
Based on the fluorescence enhancement property of the G-triplex (G3)-Thioflavin T (ThT) complex, a fluorescent biosensor was successfully constructed for detection of ALP using a G3-based dumbbell-shaped probe (DP). In this work, calf intestinal ALP (CIP) can act on the 5'-terminal phosphate of DP, thereby regulating the subsequent DNA ligation reaction and enzyme cleavage of the DP nick. When the DP is digested by exonuclease, the released G3 can bind to ThT, resulting in enhanced fluorescence signal. The linear range of the sensor for CIP detection is 0.00002-0.002 U/μL, and the detection limit is 1.8 × 10-5 U/μL. The proposed method has the advantages of simplicity, no fluorophore labeling, and low cost, which was successfully applied to the screening of enzyme inhibitors and ALP determination in human serum samples. To the best of our knowledge, this is the first report of a biosensor using G3-ThT as the signal indicator for ALP detection, which should promote the further exploitation of applying G3-ThT complex in the field of various targets recognition and analysis.
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Affiliation(s)
- Wenping Zhu
- College of Chemistry and Chemical Engineering, Zhoukou Normal University, Zhoukou, 466001, People's Republic of China.
| | - Zhiyi Li
- College of Chemistry and Chemical Engineering, Zhoukou Normal University, Zhoukou, 466001, People's Republic of China
| | - Liyan Dai
- College of Chemistry and Chemical Engineering, Zhoukou Normal University, Zhoukou, 466001, People's Republic of China
| | - Weijie Yang
- College of Chemistry and Chemical Engineering, Zhoukou Normal University, Zhoukou, 466001, People's Republic of China
| | - Yanxia Li
- College of Chemistry and Chemical Engineering, Zhoukou Normal University, Zhoukou, 466001, People's Republic of China
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Jin X, Sun T, Wu Z, Wang D, Hu F, Xu J, Li X, Qiu J. Label-free hairpin probe for the rapid detection of Hg(II) based on T-Hg(II)-T. Anal Chim Acta 2022; 1221:340113. [DOI: 10.1016/j.aca.2022.340113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Revised: 06/11/2022] [Accepted: 06/20/2022] [Indexed: 11/30/2022]
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Li Q, Peng S, Chang Y, Yang M, Wang D, Zhou X, Shao Y. A G-triplex-Based Label-Free Fluorescence Switching Platform for the Specific Recognition of Chromium Species. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2022.114071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Wu X, Chen Q, Huang Y, Ning Q, Wang Y, Wang Y, Liu Z. Signal-enhanced visual strand exchange amplification detection of African swine fever virus by the introduction of multimeric G-quadruplex/hemin DNAzyme. ANAL SCI. [DOI: 10.1007/s44211-022-00087-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Accepted: 01/11/2022] [Indexed: 01/11/2023]
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Zhao Y, Zhang H, Lian L, Wang X, Gao W, Zhu B, Lou D. A molecular beacon-like Ag nanocluster fluorescence probe for nucleic acid detection. ANAL SCI 2022; 38:131-136. [PMID: 35287214 PMCID: PMC8882438 DOI: 10.2116/analsci.21p146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Accepted: 08/24/2021] [Indexed: 11/23/2022]
Abstract
We have developed a type of low-cost, label-free silver nanocluster molecular beacon-like fluorescence sensor with a DNA template. To detect target DNA with this probe, we use a hairpin DNA sequence based on a "turn-on" strategy. The transformation of hairpin DNA would visibly influence the formation of Ag nanoclusters, such that the stronger fluorescence will be measured with the solution containing target nucleic acids than that without targets nucleic acids. There is a good liner relationship between the fluorescence and the target DNA concentrations, ranging from 1 to 750 nmol L-1. Importantly, the detection sensing platform allows down to 1 nmol L-1, which is much lower than other studies.
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Affiliation(s)
- Ying Zhao
- Department of Analytical Chemistry, Jilin Institute of Chemical Technology, 45 Chengde Street, Jilin, 132022, People's Republic of China
| | - Hao Zhang
- Department of Analytical Chemistry, Jilin Institute of Chemical Technology, 45 Chengde Street, Jilin, 132022, People's Republic of China.
| | - Lili Lian
- Department of Analytical Chemistry, Jilin Institute of Chemical Technology, 45 Chengde Street, Jilin, 132022, People's Republic of China
| | - Xiyue Wang
- Department of Analytical Chemistry, Jilin Institute of Chemical Technology, 45 Chengde Street, Jilin, 132022, People's Republic of China
| | - Wenxiu Gao
- Department of Analytical Chemistry, Jilin Institute of Chemical Technology, 45 Chengde Street, Jilin, 132022, People's Republic of China
| | - Bo Zhu
- Department of Analytical Chemistry, Jilin Institute of Chemical Technology, 45 Chengde Street, Jilin, 132022, People's Republic of China
| | - Dawei Lou
- Department of Analytical Chemistry, Jilin Institute of Chemical Technology, 45 Chengde Street, Jilin, 132022, People's Republic of China.
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Marilovtseva EV, Studitsky VM. Guanine Quadruplexes in Cell Nucleus Metabolism. Mol Biol 2021. [DOI: 10.1134/s0026893321040075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Sang F, Yin S, Pan J, Zhang Z. Ultrasensitive colorimetric strategy for Hg 2+ detection based on T-Hg 2+-T configuration and target recycling amplification. Anal Bioanal Chem 2021; 413:7001-7007. [PMID: 34532763 DOI: 10.1007/s00216-021-03657-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Revised: 08/22/2021] [Accepted: 09/09/2021] [Indexed: 11/26/2022]
Abstract
A novelty aptasensor for ultrasensitive detection of Hg2+ is developed, exploiting the combination of plasmonic properties of gold nanoparticles (AuNPs) and exonuclease III (Exo III)-assisted target recycling for signal amplification. In the presence of Hg2+, a DNA duplex can be formed due to the strong coordination of Hg2+ and T bases of single-stranded DNA (ssDNA) probe. Exo III digests the DNA duplex from the 3' to 5' direction, resulting in the releasing of Hg2+. Then, the released Hg2+ binds with another ssDNA probe through T-Hg2+-T coordination. After Exo III-assisted Hg2+ cycles, numerous ssDNA probes are exhausted, which promotes poly(diallyldimethylammonium chloride) (PDDA)-induced AuNP aggregation, leading to an obvious color change and aggregation-induced plasmon red shift of AuNPs (from 520 to 610 nm). Therefore, this biosensor is ultrasensitive, which is applicable to the detection of trace level of Hg2+ with a linear range from 5 pM to 0.6 nM and an ultralow detection limit of 0.2 pM. Furthermore, it enables visual detection of Hg2+ as low as 50 pM by the naked eye. More importantly, the assay can be applied to the reliable determination of spiked Hg2+ in sea water samples with good recovery.
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Affiliation(s)
- Fuming Sang
- School of Marine Science and Technology, Harbin Institute of Technology, Weihai, 264209, People's Republic of China.
| | - Suyao Yin
- School of Marine Science and Technology, Harbin Institute of Technology, Weihai, 264209, People's Republic of China
| | - Jianxin Pan
- School of Marine Science and Technology, Harbin Institute of Technology, Weihai, 264209, People's Republic of China
| | - Zhizhou Zhang
- School of Marine Science and Technology, Harbin Institute of Technology, Weihai, 264209, People's Republic of China
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Lai Y, Li M, Liao X, Zou L. Smartphone-Assisted Colorimetric Detection of Glutathione and Glutathione Reductase Activity in Human Serum and Mouse Liver Using Hemin/G-Quadruplex DNAzyme. Molecules 2021; 26:molecules26165016. [PMID: 34443603 PMCID: PMC8398021 DOI: 10.3390/molecules26165016] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Revised: 08/12/2021] [Accepted: 08/16/2021] [Indexed: 11/26/2022] Open
Abstract
Abnormal levels of reduced glutathione (GSH) and glutathione reductase (GR) are usually related to a variety of diseases, so it is of great significance to determine the GSH concentration and GR activity. We herein develop a smartphone-assisted colorimetric biosensor for the detection of GSH and GR activity in human serum and mouse liver using hemin/G-quadruplex DNAzyme. Firstly, an obvious color change from colorless to green can be observed, owing to the high peroxidase-like activity of hemin/G-quadruplex DNAzyme toward 2,2′-azino-bis(3-ethylbenzothiozoline-6-sulfonic acid) (ABTS). With the addition of GSH or GR, the H2O2-mediated oxidation of ABTS catalyzed by hemin/G-quadruplex DNAzyme is significantly inhibited, resulting in remarkable color fading. Therefore, the detection of GSH and GR activity can be achieved by observing the color transition or measuring the absorbance at 420 nm. The detection limit was estimated to be as low as 0.1 μM and 10 μU/mL for GSH and GR, respectively. More interestingly, the RGB values of the sensing system can be identified by the smartphone application (APP, color collect), which makes it an ideal format for on-site determination and point-of-care testing (POCT). In addition, the proposed method shows excellent selectivity and acceptable applicability for the determination of GSH concentration and GR activity in human serum samples and mouse liver tissues, which might hold great application potential in clinical diagnosis and drug screening.
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Abstract
Both G-quadruplex (G4) and G-triplex (G3) can bind thioflavin T (ThT) to light up the fluorescence of ThT. G4/ThT and G3/ThT can be used as fluorescent indicators to construct a label-free molecular beacon (MB). In this work, we present a comparative perspective of G3/ThT-based MB and G4/ThT-based MB. The results showed that the G3/ThT-based MB had higher sensitivity and faster response speed than the G4/ThT-based MB. Furthermore, we systematically studied the effect of stem length and varying pairs on the response of the G3/ThT-based MB, and then proposed one rational design of the G3/ThT-based MB. This work demonstrates that the shorter G3 is more suitable for constructing the MB stem. This present work opens a promising way to develop a sensitive, simple and homogeneous biosensing method.
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Affiliation(s)
- Jingru Gao
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education; Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China.
| | - Qiang Liu
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education; Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China.
| | - Wei Liu
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education; Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China.
| | - Yan Jin
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education; Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China.
| | - Baoxin Li
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education; Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710062, China.
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Janani B, Syed A, Thomas AM, Marraiki N, Al-Rashed S, Elgorban AM, Raju LL, Das A, Khan SS. Enhanced SPR signals based on methylenediphosphonic acid functionalized Ag NPs for the detection of Hg(II) in the presence of an antioxidant glutathione. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113281] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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