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Qi H, Wang Z, Li H, Li F. Directionally In Situ Self-Assembled Iridium(III)-Polyimine Complex-Encapsulated Metal-Organic Framework Two-Dimensional Nanosheet Electrode To Boost Electrochemiluminescence Sensing. Anal Chem 2023; 95:12024-12031. [PMID: 37526583 DOI: 10.1021/acs.analchem.3c01882] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/02/2023]
Abstract
Manufacturing electrochemiluminescence (ECL) electrodes to detect analytes with high performance in the aqueous phase for water-insoluble metal complexes is a great challenge. Here, a directional self-assembling avenue for in situ fabricating iridium(III)-polyimine complex-encapsulated metal-organic framework (MOF) two-dimensional electrode Hf-MOF/Ir2PD/APS/ITO is developed. The electrode displayed bright red ECL emission with high stability in the aqueous phase and specific adsorption toward ssDNA against dsDNA and mNs. That is to say, a "high-performance and multifunctional ECL electrode" is presented and explored for sensitive detection of acetamiprid (Ace) with a limit of detection of 0.0025 nM, where Ace-aptamer recognition-switched Exonuclease III-mediated digestion to make large numbers of Fc-labeled ssDNA transform into Fc-mNs. Furthermore, the proposed method was triumphantly employed to monitor the change in the residual concentration of Ace in pakchoi. This work breaks through the bottleneck of metal complex-based ECL emission in organic solvents and provides a novel strategy to develop high-performance ECL sensors.
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Affiliation(s)
- Hongjie Qi
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, PR China
- College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, PR China
| | - Zhixin Wang
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, PR China
| | - Haiyin Li
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, PR China
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, Key Laboratory of Analytical Science and Technology of Hebei Province, College of Chemistry and Materials Science, Hebei University, Baoding 071002 Hebei, PR China
| | - Feng Li
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, PR China
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Ratiometric detection of transcription factor based on Europium(III) complex-doped silicon nanoparticles and a G-quadruplex-selective Iridium(III) complex. Anal Chim Acta 2022; 1209:339855. [DOI: 10.1016/j.aca.2022.339855] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Revised: 04/11/2022] [Accepted: 04/18/2022] [Indexed: 11/17/2022]
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Chen F, Li G, Wu C, Wang L, Ko CN, Ma DL, Leung CH. Interference Reduction Biosensing Strategy for Highly Sensitive microRNA Detection. Anal Chem 2022; 94:4513-4521. [PMID: 35234447 DOI: 10.1021/acs.analchem.2c00138] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
MicroRNAs are potential biomarkers for human cancers and other diseases due to their roles as post-transcriptional regulators for gene expression. However, the detection of miRNAs by conventional methods such as RT-qPCR, in situ hybridization, northern blot-based platforms, and next-generation sequencing is complicated by short length, low abundance, high sequence homology, and susceptibility to degradation of miRNAs. In this study, we developed a nicking endonuclease-mediated interference reduction rolling circle amplification (NEM-IR-RCA) strategy for the ultrasensitive and highly specific detection of miRNA-21. This method exploits the advantages of the optical properties of long-lived iridium(III) probes, in conjunction with time-resolved emission spectroscopy (TRES) and exponential rolling circle amplification (E-RCA). Under the NEM-IR-RCA-based signal enhancement processes, the limit of detection of miRNA-21 was down to 0.0095 fM with a linear range from 0.05 to 100 fM, which is comparable with the conventional RT-qPCR. Unlike RT-qPCR, the strategy was performed at a lower and constant temperature without heating/cooling cycles and reverse transcription. The strategy could clearly discriminate between matched and mismatched targets, demonstrating high specificity. Moreover, the potential application of this method was demonstrated in cancer cells and mouse serum samples, showing good agreement with RT-qPCR results. Apart from miRNA-21 detection, this platform could be also adapted for detecting other miRNAs, such as let-7a and miRNA-22, indicating its excellent potential for biomedical research and clinical diagnostics.
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Affiliation(s)
- Feng Chen
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Taipa, Macau SAR 999078, China
| | - Guodong Li
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Taipa, Macau SAR 999078, China.,Zhuhai UM Science and Technology Research Institute, Zhuhai 519031, China
| | - Chun Wu
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong SAR 999077, China
| | - Ling Wang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Taipa, Macau SAR 999078, China
| | - Chung-Nga Ko
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong SAR 999077, China
| | - Dik-Lung Ma
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong SAR 999077, China
| | - Chung-Hang Leung
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Taipa, Macau SAR 999078, China.,Department of Biomedical Sciences, Faculty of Health Sciences, University of Macau, Taipa, Macao SAR 999078, China.,Zhuhai UM Science and Technology Research Institute, Zhuhai 519031, China
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Yin L, Zhang H, Wang Y, He L, Lu L. Exploring the fluorescence enhancement of the split G-quadruplex towards DNA-templated AgNCs and their application in omethoate detection. J Mater Chem B 2022; 10:8856-8861. [DOI: 10.1039/d2tb01755e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Based on the enhancement of split G-quadruplex on the fluorescence of DNA-templated AgNCs, a facile label-free and enzyme-free omethoate detection platform has been successfully constructed through the interaction between split G4 with DNA-AgNCs.
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Affiliation(s)
- Li Yin
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
| | - Hui Zhang
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
| | - Ying Wang
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
| | - Liang He
- Penglai Jiaxin Dye Chemical., LTD, Yantai 265600, China
| | - Lihua Lu
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
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An exonuclease protection and CRISPR/Cas12a integrated biosensor for the turn-on detection of transcription factors in cancer cells. Anal Chim Acta 2021; 1165:338478. [PMID: 33975701 DOI: 10.1016/j.aca.2021.338478] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Accepted: 03/30/2021] [Indexed: 02/07/2023]
Abstract
Transcription factors (TFs) are critical proteins that regulate the expression of genes, and the abnormal change of TFs levels is directly related to physical dysfunctions. Herein, we developed a clustered regularly interspaced short palindromic repeats (CRISPR)-based biosensor for the measurement of TFs level with the assistance of exonuclease protection assay. A dsDNA (activator) with the ability to activate Cas12a was engineered to contain TFs binding domain, and the binding between TFs and the activator can protect the dsDNA from being digested by exonuclease III (Exo III). The reserved activator then triggered a CRISPR/Cas12a reporting reaction to produce fluorescent signal for detection. In the detection of nuclear factor-kappa B (NF-κB) p50 subunit, the limit of detection of 0.2 pM and limit of quantification of 0.6 pM were obtained respectively, and the performance of this biosensor has been challenged by cell nucleoprotein extracts. Additionally, this method can be applied in the screening and evaluation of TFs inhibitors, calculating the IC50 of oridonin. Integrating merits including high sensitivity, low cost, and good portability, this method may enrich the arsenal for TFs-related applications.
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Li B, Xie S, Xia A, Suo T, Huang H, Zhang X, Chen Y, Zhou X. Recent advance in the sensing of biomarker transcription factors. Trends Analyt Chem 2020. [DOI: 10.1016/j.trac.2020.116039] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Pan J, Zeng L, Chen J. An enzyme-free DNA circuit for the amplified detection of Cd 2+ based on hairpin probe-mediated toehold binding and branch migration. Chem Commun (Camb) 2019; 55:11932-11935. [PMID: 31531427 DOI: 10.1039/c9cc06311k] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
An enzyme-free DNA circuit was designed for the amplified detection of Cd2+ based on hairpin probe-mediated toehold binding and branch migration. A Cd2+-specific aptamer was used to recognize Cd2+ and a G-quadruplex was used to report the detection signal. The assay is sensitive, with a detection limit of 5 pM.
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Affiliation(s)
- Jiafeng Pan
- School of Food Science and Engineering, Foshan University, Foshan 528000, China and Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Guangdong Institute of Eco-environmental Science & Technology, Guangzhou 510650, China.
| | - Lingwen Zeng
- School of Food Science and Engineering, Foshan University, Foshan 528000, China
| | - Junhua Chen
- Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Guangdong Institute of Eco-environmental Science & Technology, Guangzhou 510650, China.
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