1
|
Zhang R, Wu J, Ao H, Fu J, Qiao B, Wu Q, Ju H. A Rolling Circle-Amplified G-Quadruplex/Hemin DNAzyme for Chemiluminescence Immunoassay of the SARS-CoV-2 Protein. Anal Chem 2021; 93:9933-9938. [PMID: 34227801 PMCID: PMC8276600 DOI: 10.1021/acs.analchem.1c02229] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Accepted: 06/28/2021] [Indexed: 01/03/2023]
Abstract
Sensitive detection of the SARS-CoV-2 protein remains a great research interest in clinical screening and diagnosis owing to the coronavirus epidemic. Here, an ultrasensitive chemiluminescence (CL) imaging strategy was developed through proximity hybridization to trigger the formation of a rolling circle-amplified G-quadruplex/hemin DNAzyme for the detection of the SARS-CoV-2 protein. The target protein was first recognized by a pair of DNA-antibody conjugates, Ab-1 and Ab-2, to form a proximity-ligated complex, Ab-1/SARS-CoV-2/Ab-2, which contained a DNA sequence complemental to block DNA and thus induced a strand displacement reaction to release the primer from a block/primer complex. The released primer then triggered a rolling circle amplification to form abundant DNAzyme units in the presence of hemin, which produced a strong chemiluminescent signal for the detection of the target protein by catalyzing the oxidation of luminol by hydrogen peroxide. The proposed assay showed a detectable concentration range over 5 orders of magnitude with the detection limit down to 6.46 fg/mL. The excellent selectivity, simple procedure, acceptable accuracy, and intrinsic high throughput of the imaging technique for analysis of serum samples demonstrated the potential applicability of the proposed detection method in clinical screening and diagnosis.
Collapse
Affiliation(s)
- Rui Zhang
- School
of Tropical Medicine and Laboratory Medicine, Key Laboratory of Emergency
and Trauma of Ministry of Education, Hainan
Medical University, Haikou 571199, China
| | - Jie Wu
- State
Key Laboratory of Analytical Chemistry for Life Science, School of
Chemistry and Chemical Engineering, Nanjing
University, Nanjing 210023, China
| | - Hang Ao
- State
Key Laboratory of Analytical Chemistry for Life Science, School of
Chemistry and Chemical Engineering, Nanjing
University, Nanjing 210023, China
| | - Jinling Fu
- School
of Tropical Medicine and Laboratory Medicine, Key Laboratory of Emergency
and Trauma of Ministry of Education, Hainan
Medical University, Haikou 571199, China
| | - Bin Qiao
- School
of Tropical Medicine and Laboratory Medicine, Key Laboratory of Emergency
and Trauma of Ministry of Education, Hainan
Medical University, Haikou 571199, China
| | - Qiang Wu
- School
of Tropical Medicine and Laboratory Medicine, Key Laboratory of Emergency
and Trauma of Ministry of Education, Hainan
Medical University, Haikou 571199, China
| | - Huangxian Ju
- State
Key Laboratory of Analytical Chemistry for Life Science, School of
Chemistry and Chemical Engineering, Nanjing
University, Nanjing 210023, China
| |
Collapse
|
2
|
Mitoapocynin, a mitochondria targeted derivative of apocynin induces mitochondrial ROS generation and apoptosis in multiple cell types including cardiac myoblasts: a potential constraint to its therapeutic use. Mol Cell Biochem 2021; 476:2047-2059. [PMID: 33515200 DOI: 10.1007/s11010-020-04039-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Accepted: 12/22/2020] [Indexed: 10/22/2022]
Abstract
Mitoapocynin is a triphenylphosphonium conjugated derivative of apocynin that specifically locates to the mitochondria. It has been developed as a mitochondrially targeted therapeutic antioxidant. We attempted to attenuate the mitochondrial ROS induced in H9c2 cardiac myoblast cells treated with norepinephrine. Mitoapocynin was a poor quencher of total ROS as detected by the fluoroprobe DCFH-DA. Using mitochondrial superoxide specific probe MitoSoxRed, we found that 5-10 µM mitoapocynin itself induces superoxide over and above that is generated by the norepinephrine treatment. A supposedly control molecule to mitoapocynin, the synthetic compound PhC11TPP, having the triphenylphosphonium group and a benzene moiety with C11 aliphatic chain spacer was also found to be a robust inducer of mitochondrial ROS. Subsequent assays with several cell lines viz., NIH3T3, HEK293, Neuro2A, MCF-7 and H9c2, showed that prolonged exposure to mitoapocynin induces cell death by apoptosis that can be partially prevented by the general antioxidant N-acetyl cysteine. Analyses of mitochondrial electron transport complexes by Blue Native Polyacrylamide gel electrophoresis showed that both mitoapocynin and PhC11TPP disrupt the mitochondrial Complex I and V, and in addition, PhC11TPP also damages the Complex IV. Our data thus highlights the limitations of the therapeutic use of mitoapocynin as an antioxidant.
Collapse
|
3
|
Yin C, Zhao Q, Yue A, Du W, Liu D, Zhao J, Zhang Y, Wang M. Colorimetric Detection of Class A Soybean Saponins by G-Quadruplex-Based Hybridization Chain Reaction. JOURNAL OF ANALYTICAL METHODS IN CHEMISTRY 2020; 2020:8813239. [PMID: 33204574 PMCID: PMC7661121 DOI: 10.1155/2020/8813239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/09/2020] [Revised: 10/15/2020] [Accepted: 10/22/2020] [Indexed: 06/11/2023]
Abstract
Soybean saponin is one of the important secondary metabolites in seeds, which has various beneficial physiological functions to human health. GmSg-1 gene is the key enzyme gene for synthesizing class A saponins. It is of great significance to realize the visual and rapid detection of class A saponins at the genetic level. The hybridization chain reaction (HCR) was employed to the visual detection of GmSg-1 gene, which was implemented by changing the length of the target fragment to 92 bp and using the hairpin probes we designed to detect the GmSg-1 a and GmSg-1 b genes. The best condition of HCR reaction is hemin (1.2 μM), Triton X-100 (0.002%), ABTS (3.8 μM), and H2O2 (1.5 mM). It was found that HCR has high specificity for GmSg-1 gene and could be applied to the visual detection of different soybean cultivars containing Aa type, Ab type, and Aa/Ab type saponins, which could provide technical reference and theoretical basis for molecular breeding of soybean and development of functional soybean products.
Collapse
Affiliation(s)
- Congcong Yin
- College of Arts and Sciences, Shanxi Agricultural University, Taigu 030801, Shanxi, China
| | - Qiaoling Zhao
- College of Arts and Sciences, Shanxi Agricultural University, Taigu 030801, Shanxi, China
| | - Aiqin Yue
- College of Agronomy, Shanxi Agricultural University, Taigu 030801, Shanxi, China
| | - Weijun Du
- College of Agronomy, Shanxi Agricultural University, Taigu 030801, Shanxi, China
| | - Dingbin Liu
- College of Chemistry, Nankai University, Tianjin 300071, China
| | - Jinzhong Zhao
- College of Arts and Sciences, Shanxi Agricultural University, Taigu 030801, Shanxi, China
| | - Yongpo Zhang
- College of Arts and Sciences, Shanxi Agricultural University, Taigu 030801, Shanxi, China
| | - Min Wang
- College of Agronomy, Shanxi Agricultural University, Taigu 030801, Shanxi, China
| |
Collapse
|
4
|
LI HY, CHANG JF, LYU WX, LI F. Aggregation Induced Emission Fluorogen-Based Label-Free Biosensor for Highly Sensitive Detection of Carcinoembryonic Antigen. CHINESE JOURNAL OF ANALYTICAL CHEMISTRY 2020. [DOI: 10.1016/s1872-2040(20)60051-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
5
|
Bai Y, Zhang H, Zhao L, Wang Y, Chen X, Zhai H, Tian M, Zhao R, Wang T, Xu H, Feng F. A novel aptasensor based on HCR and G-quadruplex DNAzyme for fluorescence detection of Carcinoembryonic Antigen. Talanta 2020; 221:121451. [PMID: 33076074 DOI: 10.1016/j.talanta.2020.121451] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Revised: 07/15/2020] [Accepted: 07/22/2020] [Indexed: 12/11/2022]
Abstract
In this paper, a rationally designed aptasensing platform based on Hybridization Chain Reaction (HCR) and G-quadruplex DNAzyme for the fluorescence detection of Carcinoembryonic Antigen (CEA) has been developed. In the presence of target CEA, the aptamer sequence in Aptamer Probe (AP) specifically bound to CEA, resulting in the AP conformation change and thus releasing initiator, which triggered the autonomous cross-opening of Hairpin 1 (H1) and Hairpin 2 (H2) that yielded extended nicked double-stranded DNA via HCR. Upon the addition of hemin, G-rich segments at the end of H1 and H2 self-assembled into the peroxidase-mimicking hemin/G-quadruplex DNAzymes, which catalyzed the hydrogen peroxide-mediated oxidation of thiamine to achieve fluorescence detection of CEA. The HCR product, and the formation and catalytic performance of DNAzyme were characterized by agarose gel electrophoresis, UV-vis spectroscopy and fluorescence spectroscopy, respectively. Under optimal conditions, the fluorescent aptasensor showed a linear relationship ranging from 0.25 to 1.5 nM toward CEA with a detection limit of 0.2 nM. In addition, this aptasensor exhibited high selectivity for CEA without being affected by other interfering proteins, such as IgG, AFP and PSA. Furthermore, this proposed aptasensor was successfully applied to CEA analysis in diluted human serum samples. It is believed that this strategy has a promising potential in biochemical analysis and clinic application.
Collapse
Affiliation(s)
- Yunfeng Bai
- College of Chemistry and Environmental Engineering, Shanxi Datong University, Datong, 037009, China.
| | - Huilin Zhang
- College of Chemistry and Environmental Engineering, Shanxi Datong University, Datong, 037009, China; College of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, 030006, China
| | - Lu Zhao
- College of Chemistry and Environmental Engineering, Shanxi Datong University, Datong, 037009, China
| | - Yuzhen Wang
- College of Chemistry and Environmental Engineering, Shanxi Datong University, Datong, 037009, China
| | - Xiaoliang Chen
- College of Chemistry and Environmental Engineering, Shanxi Datong University, Datong, 037009, China
| | - Hong Zhai
- College of Chemistry and Environmental Engineering, Shanxi Datong University, Datong, 037009, China
| | - Maozhong Tian
- College of Chemistry and Environmental Engineering, Shanxi Datong University, Datong, 037009, China
| | - Ruirui Zhao
- College of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, 030006, China
| | - Tao Wang
- College of Chemistry and Environmental Engineering, Shanxi Datong University, Datong, 037009, China
| | - Hui Xu
- College of Chemistry and Environmental Engineering, Shanxi Datong University, Datong, 037009, China
| | - Feng Feng
- College of Chemistry and Environmental Engineering, Shanxi Datong University, Datong, 037009, China; College of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, 030006, China.
| |
Collapse
|
6
|
Cao J, Wang M, Yu H, She Y, Cao Z, Ye J, Abd El-Aty AM, Hacımüftüoğlu A, Wang J, Lao S. An Overview on the Mechanisms and Applications of Enzyme Inhibition-Based Methods for Determination of Organophosphate and Carbamate Pesticides. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:7298-7315. [PMID: 32551623 DOI: 10.1021/acs.jafc.0c01962] [Citation(s) in RCA: 67] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Acetylcholinesterase inactivating compounds, such as organophosphate (OP) and carbamate (CM) pesticides, are widely used in agriculture to ensure sustainable production of food and feed. As a consequence of their applications, they would result in neurotoxicity, even death. In this essence, the development of enzyme inhibition methods still shows great significance as rapid detection techniques for on-site large-scale screening of OPs and CMs. Initially, mechanisms and applications of various enzyme-inhibition-based methods and devices, including optical colorimetric assay, fluorometric assays, electrochemical biosensors, rapid test card, and microfluidic device, are highlighted in the present overview. Further, to enhance the enzyme sensitivity for detection; alternative enzyme sources or high yield enrichment methods (such as abzyme, artificial enzyme, and recombinant enzyme), as well as enzyme reactivation and identification, are also addressed in this comprehensive overview.
Collapse
Affiliation(s)
- Jing Cao
- Institute of Quality Standardization & Testing Technology for Agro-products, Chinese Academy of Agricultural Sciences, 100081, Beijing, China
- Key Laboratory of Agrofood Safety and Quality (Beijing), Ministry of Agriculture, 100193, Beijing, China
| | - Miao Wang
- Institute of Quality Standardization & Testing Technology for Agro-products, Chinese Academy of Agricultural Sciences, 100081, Beijing, China
- Key Laboratory of Agrofood Safety and Quality (Beijing), Ministry of Agriculture, 100193, Beijing, China
| | - He Yu
- Institute of Quality Standardization & Testing Technology for Agro-products, Chinese Academy of Agricultural Sciences, 100081, Beijing, China
- Key Laboratory of Agrofood Safety and Quality (Beijing), Ministry of Agriculture, 100193, Beijing, China
| | - Yongxin She
- Institute of Quality Standardization & Testing Technology for Agro-products, Chinese Academy of Agricultural Sciences, 100081, Beijing, China
- Key Laboratory of Agrofood Safety and Quality (Beijing), Ministry of Agriculture, 100193, Beijing, China
| | - Zhen Cao
- Institute of Quality Standardization & Testing Technology for Agro-products, Chinese Academy of Agricultural Sciences, 100081, Beijing, China
- Key Laboratory of Agrofood Safety and Quality (Beijing), Ministry of Agriculture, 100193, Beijing, China
| | - Jiaming Ye
- Yangtze Delta Region Institute of Tsinghua University, 314006, Jiaxing, China
| | - A M Abd El-Aty
- State Key Laboratory of Biobased Material and Green Papermaking, College of Food Science and Engineering, Qilu University of Technology, Shandong Academy of Science, Jinan 250353, China
- Department of Pharmacology, Faculty of Veterinary Medicine, Cairo University, 12211, Giza, Egypt
- Department of Medical Pharmacology, Medical Faculty, Ataturk University, 25240, Erzurum, Turkey
| | - Ahmet Hacımüftüoğlu
- Department of Medical Pharmacology, Medical Faculty, Ataturk University, 25240, Erzurum, Turkey
| | - Jing Wang
- Institute of Quality Standardization & Testing Technology for Agro-products, Chinese Academy of Agricultural Sciences, 100081, Beijing, China
- Key Laboratory of Agrofood Safety and Quality (Beijing), Ministry of Agriculture, 100193, Beijing, China
- Agro-products Quality Safety and Testing Technology Research Institute, Guangxi Academy of Agricultural Sciences, 53003, Nanning, China
| | - Shuibing Lao
- Agro-products Quality Safety and Testing Technology Research Institute, Guangxi Academy of Agricultural Sciences, 53003, Nanning, China
| |
Collapse
|
7
|
Norvaiša K, Kielmann M, Senge MO. Porphyrins as Colorimetric and Photometric Biosensors in Modern Bioanalytical Systems. Chembiochem 2020; 21:1793-1807. [PMID: 32187831 PMCID: PMC7383976 DOI: 10.1002/cbic.202000067] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2020] [Revised: 03/04/2020] [Indexed: 12/18/2022]
Abstract
Advances in porphyrin chemistry have provided novel materials and exciting technologies for bioanalysis such as colorimetric sensor array (CSA), photo-electrochemical (PEC) biosensing, and nanocomposites as peroxidase mimetics for glucose detection. This review highlights selected recent advances in the construction of supramolecular assemblies based on the porphyrin macrocycle that provide recognition of various biologically important entities through the unique porphyrin properties associated with colorimetry, spectrophotometry, and photo-electrochemistry.
Collapse
Affiliation(s)
- Karolis Norvaiša
- School of Chemistry, SFI Tetrapyrrole LaboratoryTrinity Biomedical Sciences Institute152–160 Pearse Street, Trinity College Dublin The University of DublinDublin2Ireland
| | - Marc Kielmann
- School of Chemistry, SFI Tetrapyrrole LaboratoryTrinity Biomedical Sciences Institute152–160 Pearse Street, Trinity College Dublin The University of DublinDublin2Ireland
| | - Mathias O. Senge
- School of Chemistry, SFI Tetrapyrrole LaboratoryTrinity Biomedical Sciences Institute152–160 Pearse Street, Trinity College Dublin The University of DublinDublin2Ireland
- Institute for Advanced Study (TUM-IAS)Lichtenberg-Strasse 2a85748GarchingGermany
| |
Collapse
|
8
|
Low-background electrochemical biosensor for one-step detection of base excision repair enzyme. Biosens Bioelectron 2020; 150:111865. [DOI: 10.1016/j.bios.2019.111865] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Revised: 11/07/2019] [Accepted: 11/08/2019] [Indexed: 11/18/2022]
|
9
|
Rafiee SD, Kocabey S, Mayer M, List J, Rüegg C. Detection of HER2 + Breast Cancer Cells using Bioinspired DNA-Based Signal Amplification. ChemMedChem 2020; 15:661-666. [PMID: 31943804 PMCID: PMC7187270 DOI: 10.1002/cmdc.201900697] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Revised: 12/17/2019] [Indexed: 01/25/2023]
Abstract
Circulating tumor cells (CTC) are promising biomarkers for metastatic cancer detection and monitoring progression. However, detection of CTCs remains challenging due to their low frequency and heterogeneity. Herein, we report a bioinspired approach to detect individual cancer cells, based on a signal amplification cascade using a programmable DNA hybridization chain reaction (HCR) circuit. We applied this approach to detect HER2+ cancer cells using the anti‐HER2 antibody (trastuzumab) coupled to initiator DNA eliciting a HCR cascade that leads to a fluorescent signal at the cell surface. At 4 °C, this HCR detection scheme resulted in highly efficient, specific and sensitive signal amplification of the DNA hairpins specifically on the membrane of the HER2+ cells in a background of HER2− cells and peripheral blood leukocytes, which remained almost non‐fluorescent. The results indicate that this system offers a new strategy that may be further developed toward an in vitro diagnostic platform for the sensitive and efficient detection of CTC.
Collapse
Affiliation(s)
- Sarah D Rafiee
- Department of Oncology, Microbiology and Immunology Faculty of Science and Medicine, University of Fribourg, Chemin du Musée 18, PER17, 1700, Fribourg, Switzerland
| | - Samet Kocabey
- Department of Oncology, Microbiology and Immunology Faculty of Science and Medicine, University of Fribourg, Chemin du Musée 18, PER17, 1700, Fribourg, Switzerland
| | - Michael Mayer
- BioPhysics, Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, PER 18, 1700, Fribourg, Switzerland
| | - Jonathan List
- BioPhysics, Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, PER 18, 1700, Fribourg, Switzerland.,Physics of Synthetic Biological Systems, Technical University Munich, Am Coulombwall 4a, 85748, Garching, Germany
| | - Curzio Rüegg
- Department of Oncology, Microbiology and Immunology Faculty of Science and Medicine, University of Fribourg, Chemin du Musée 18, PER17, 1700, Fribourg, Switzerland
| |
Collapse
|
10
|
Batra K, Zahn S, Heine T. Benchmark of Simplified Time‐Dependent Density Functional Theory for UV–Vis Spectral Properties of Porphyrinoids. ADVANCED THEORY AND SIMULATIONS 2019. [DOI: 10.1002/adts.201900192] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Kamal Batra
- Technische Universität DresdenTheoretische Chemie Bergstraße 66c 01062 Dresden Germany
| | - Stefan Zahn
- Leibniz Institut für Oberflächenmodifizierung (IOM) Permoserstraße 15 04318 Leipzig Germany
| | - Thomas Heine
- Technische Universität DresdenTheoretische Chemie Bergstraße 66c 01062 Dresden Germany
- Helmholtz‐Zentrum Dresden‐Rossendorf, Forschungsstelle Leipzig Permoserstraße 15 04318 Leipzig Germany
| |
Collapse
|
11
|
Zhong Y, Tang X, Li J, Lan Q, Min L, Ren C, Hu X, Torrente-Rodríguez RM, Gao W, Yang Z. A nanozyme tag enabled chemiluminescence imaging immunoassay for multiplexed cytokine monitoring. Chem Commun (Camb) 2019; 54:13813-13816. [PMID: 30460939 DOI: 10.1039/c8cc07779g] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
We report a new concept of a chemiluminescence imaging nanozyme immunoassay (CINIA), in which nanozymes are exploited as catalytic tags for simultaneous multiplex detection of cytokines. The CINIA provides a novel and universal nanozyme-labeled multiplex immunoassay strategy for high-throughput detection of relevant biomarkers and further disease diagnosis.
Collapse
Affiliation(s)
- Yihong Zhong
- Guangling College, College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, P. R. China.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
12
|
Wu J, Wang X, Wang Q, Lou Z, Li S, Zhu Y, Qin L, Wei H. Nanomaterials with enzyme-like characteristics (nanozymes): next-generation artificial enzymes (II). Chem Soc Rev 2019; 48:1004-1076. [DOI: 10.1039/c8cs00457a] [Citation(s) in RCA: 1628] [Impact Index Per Article: 325.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
An updated comprehensive review to help researchers understand nanozymes better and in turn to advance the field.
Collapse
Affiliation(s)
- Jiangjiexing Wu
- Department of Biomedical Engineering, College of Engineering and Applied Sciences
- Nanjing National Laboratory of Microstructures
- Jiangsu Key Laboratory of Artificial Functional Materials
- Nanjing University
- Nanjing
| | - Xiaoyu Wang
- Department of Biomedical Engineering, College of Engineering and Applied Sciences
- Nanjing National Laboratory of Microstructures
- Jiangsu Key Laboratory of Artificial Functional Materials
- Nanjing University
- Nanjing
| | - Quan Wang
- Department of Biomedical Engineering, College of Engineering and Applied Sciences
- Nanjing National Laboratory of Microstructures
- Jiangsu Key Laboratory of Artificial Functional Materials
- Nanjing University
- Nanjing
| | - Zhangping Lou
- Department of Biomedical Engineering, College of Engineering and Applied Sciences
- Nanjing National Laboratory of Microstructures
- Jiangsu Key Laboratory of Artificial Functional Materials
- Nanjing University
- Nanjing
| | - Sirong Li
- Department of Biomedical Engineering, College of Engineering and Applied Sciences
- Nanjing National Laboratory of Microstructures
- Jiangsu Key Laboratory of Artificial Functional Materials
- Nanjing University
- Nanjing
| | - Yunyao Zhu
- Department of Biomedical Engineering, College of Engineering and Applied Sciences
- Nanjing National Laboratory of Microstructures
- Jiangsu Key Laboratory of Artificial Functional Materials
- Nanjing University
- Nanjing
| | - Li Qin
- Department of Biomedical Engineering, College of Engineering and Applied Sciences
- Nanjing National Laboratory of Microstructures
- Jiangsu Key Laboratory of Artificial Functional Materials
- Nanjing University
- Nanjing
| | - Hui Wei
- Department of Biomedical Engineering, College of Engineering and Applied Sciences
- Nanjing National Laboratory of Microstructures
- Jiangsu Key Laboratory of Artificial Functional Materials
- Nanjing University
- Nanjing
| |
Collapse
|
13
|
Wu D, Huang Y, Hu S, Yi X, Wang J. Sensitive Hg 2+ Sensing via Quenching the Fluorescence of the Complex between Polythymine and 5,10,15,20-tetrakis( N-methyl-4-pyridyl) Porphyrin (TMPyP). SENSORS 2018; 18:s18113998. [PMID: 30453563 PMCID: PMC6263993 DOI: 10.3390/s18113998] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Revised: 11/08/2018] [Accepted: 11/14/2018] [Indexed: 12/16/2022]
Abstract
The interaction between polythymine (dTn) and 5,10,15,20-tetrakis(N-methyl-4-pyridyl) porphyrin (TMPyP) was systematically studied using various techniques. dTn remarkably enhanced the fluorescence intensity of TMPyP as compared to other oligonucleotides. The enhanced fluorescence intensity and the shift of the emission peaks were ascribed to the formation of a π-π complex between TMPyP and dTn. And the quenching of the dTn-enhanced fluorescence by Hg2+ through a synergistic effect occurs due to the heavy atom effect. The binding of Hg2+ to TMPyP plays an important role in the Hg-TMPyP-dT30 ternary complex formation. A TMPyP-dT30-based Hg2+ sensor was developed with a dynamic range of Hg2+ from 5 nM to 100 nM. The detection limit of 1.3 nM was low enough for Hg2+ determination. The sensor also exhibited good selectivity against other metal ions. Experiments for tap water and river water demonstrated that the detection method was applicable for Hg2+ determination in real samples. The Hg2+ sensor based on oligonucleotide dT30-enhanced TMPyP fluorescence was fast and low-cost, presenting a promising platform for practical Hg2+ determination.
Collapse
Affiliation(s)
- Daohong Wu
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China.
| | - Yaliang Huang
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China.
| | - Shengqiang Hu
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China.
| | - Xinyao Yi
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China.
| | - Jianxiu Wang
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China.
| |
Collapse
|
14
|
Wen G, Dong W, Liu B, Li Z, Fan L. A novel nonenzymatic cascade amplification for ultrasensitive photoelectrochemical DNA sensing based on target driven to initiate cyclic assembly of hairpins. Biosens Bioelectron 2018; 117:91-96. [DOI: 10.1016/j.bios.2018.05.054] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Revised: 05/26/2018] [Accepted: 05/28/2018] [Indexed: 12/25/2022]
|
15
|
Park CR, Park SJ, Lee WG, Hwang BH. Biosensors Using Hybridization Chain Reaction - Design and Signal Amplification Strategies of Hybridization Chain Reaction. BIOTECHNOL BIOPROC E 2018. [DOI: 10.1007/s12257-018-0182-z] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
|
16
|
Xie S, Tang Y, Tang D, Cai Y. Highly sensitive impedimetric biosensor for Hg2+ detection based on manganese porphyrin-decorated DNA network for precipitation polymerization. Anal Chim Acta 2018; 1023:22-28. [DOI: 10.1016/j.aca.2018.04.019] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2017] [Revised: 03/23/2018] [Accepted: 04/08/2018] [Indexed: 01/12/2023]
|
17
|
Cui L, Hu J, Wang M, Diao XK, Li CC, Zhang CY. Mimic Peroxidase- and Bi2S3 Nanorod-Based Photoelectrochemical Biosensor for Signal-On Detection of Polynucleotide Kinase. Anal Chem 2018; 90:11478-11485. [DOI: 10.1021/acs.analchem.8b02673] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Lin Cui
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Shandong Normal University, Jinan 250014, China
| | - Juan Hu
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Shandong Normal University, Jinan 250014, China
| | - Meng Wang
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Shandong Normal University, Jinan 250014, China
| | - Xing-kang Diao
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Shandong Normal University, Jinan 250014, China
| | - Chen-chen Li
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Shandong Normal University, Jinan 250014, China
| | - Chun-yang Zhang
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Shandong Normal University, Jinan 250014, China
| |
Collapse
|
18
|
Duan Y, Yuan T, Xu Y, Zhao M, Guo B, Cheng W, Ding S. Detection of BCR/ABL Fusion Gene Based on MNAzyme-mediated Target-cycling and ssDNA-assisted Cascade Hybridization Reaction. ELECTROANAL 2018. [DOI: 10.1002/elan.201800254] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Yu Duan
- Key Laboratory of Clinical Laboratory Diagnostics (Ministry of Education); College of Laboratory Medicine, Chongqing Medical University; Chongqing 400016 China
| | - Taixian Yuan
- Key Laboratory of Clinical Laboratory Diagnostics (Ministry of Education); College of Laboratory Medicine, Chongqing Medical University; Chongqing 400016 China
| | - Yongjie Xu
- Department of Laboratory Medicine; Guizhou Provincial People's Hospital; Guiyang 550002 China
| | - Min Zhao
- Key Laboratory of Clinical Laboratory Diagnostics (Ministry of Education); College of Laboratory Medicine, Chongqing Medical University; Chongqing 400016 China
| | - Bin Guo
- Key Laboratory of Clinical Laboratory Diagnostics (Ministry of Education); College of Laboratory Medicine, Chongqing Medical University; Chongqing 400016 China
| | - Wei Cheng
- The Center for Clinical Molecular Medical Detection; The First Affiliated Hospital of Chongqing Medical University; Chongqing 400016 China
| | - Shijia Ding
- Key Laboratory of Clinical Laboratory Diagnostics (Ministry of Education); College of Laboratory Medicine, Chongqing Medical University; Chongqing 400016 China
| |
Collapse
|
19
|
Jia LP, Zhao RN, Wang LJ, Ma RN, Zhang W, Shang L, Wang HS. Aptamer based electrochemical assay for protein kinase activity by coupling hybridization chain reaction. Biosens Bioelectron 2018; 117:690-695. [PMID: 30014942 DOI: 10.1016/j.bios.2018.06.067] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Revised: 06/28/2018] [Accepted: 06/29/2018] [Indexed: 01/08/2023]
Abstract
The present work reported a simple, lable-free and sensitive electrochemical method for the detection of protein kinase A (PKA) activity. This method was based on the specific recognition of aptamer and the aptamer-induced hybridization chain reaction (HCR) amplification strategy. The aptasensor was constructed by immobilizing capture probe on a gold electrode via an Au-S bond. When adenosine triphosphate (ATP) aptamer was introduced, its one terminus hybridized with capture probe and the other hybridized with the complementary region of an auxiliary probe, which other region triggered HCR between two hairpin DNA (H1 and H2) to form a long DNA concatamer. At last a large number of electroactive methyle blue (MB) molecules were assembled on the dsDNA concatamer, which generated a significantly amplified electrochemical signal. In the presence of ATP, the HCR would not be performed because the aptamer specifically bond to ATP and the electrochemical response would decrease. However, when ATP and PKA coexisted, the electrochemical response would recovery because that ATP had been translated into ADP by PKA. So the activity of PKA could be effectively monitored according to the change of electrochemical signal. Based on the HCR amplification strategy, the aptasensor showed a wide linear range (4 - 4 ×105 U L-1) and a low detection limit (1.5 U L-1) for the detection of PKA. Furthermore, the method was applied to study the inhibitory effect of H-89 on PKA activity. The developed aptasensor was also used to the analysis of drug-induced PKA activity in cell lysates, indicating the potential application of the developed method in the fields of clinical diagnostics and discovery of new targeted drugs.
Collapse
Affiliation(s)
- Li-Ping Jia
- Department of Chemistry, Liaocheng University, Liaocheng, Shandong 252000, China.
| | - Ruo-Nan Zhao
- Department of Chemistry, Liaocheng University, Liaocheng, Shandong 252000, China
| | - Li-Juan Wang
- Department of Chemistry, Liaocheng University, Liaocheng, Shandong 252000, China
| | - Rong-Na Ma
- Department of Chemistry, Liaocheng University, Liaocheng, Shandong 252000, China
| | - Wei Zhang
- Department of Chemistry, Liaocheng University, Liaocheng, Shandong 252000, China
| | - Lei Shang
- Department of Chemistry, Liaocheng University, Liaocheng, Shandong 252000, China
| | - Huai-Sheng Wang
- Department of Chemistry, Liaocheng University, Liaocheng, Shandong 252000, China.
| |
Collapse
|
20
|
Hu T, Zheng YN, Li MJ, Liang WB, Chai YQ, Yuan R. A Highly Sensitive Photoelectrochemical Assay with Donor–Acceptor-Type Material as Photoactive Material and Polyaniline as Signal Enhancer. Anal Chem 2018; 90:6096-6101. [DOI: 10.1021/acs.analchem.8b00093] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Tao Hu
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry, Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, People’s Republic of China
| | - Ying-Ning Zheng
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry, Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, People’s Republic of China
| | - Meng-Jie Li
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry, Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, People’s Republic of China
| | - Wen-Bin Liang
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry, Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, People’s Republic of China
| | - Ya-Qin Chai
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry, Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, People’s Republic of China
| | - Ruo Yuan
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry, Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, People’s Republic of China
| |
Collapse
|
21
|
Huang L, Zhang L, Yang L, Yuan R, Yuan Y. Manganese porphyrin decorated on DNA networks as quencher and mimicking enzyme for construction of ultrasensitive photoelectrochemistry aptasensor. Biosens Bioelectron 2017; 104:21-26. [PMID: 29294407 DOI: 10.1016/j.bios.2017.12.037] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Revised: 12/15/2017] [Accepted: 12/22/2017] [Indexed: 11/24/2022]
Abstract
In this work, the manganese porphyrin (MnPP) decorated on DNA networks could serve as quencher and mimicking enzyme to efficiently reduce the photocurrent of photoactive material 3,4,9,10-perylene tetracarboxylic acid (PTCA), which was elaborately used to construct a novel label-free aptasensor for ultrasensitive detection of thrombin (TB) in a signal-off manner. The Au-doped PTCA (PTCA-PEI-Au) with outstanding membrane-forming and photoelectric property was modified on electrode to acquire a strong initial photoelectrochemistry (PEC) signal. Afterward, target binding aptamer Ι (TBAΙ) was modified on electrode to specially recognize target TB, which could further combine with TBAII and single-stranded DNA P1-modified platinum nanoparticles (TBAII-PtNPs-P1) for immobilizing DNA networks with abundant MnPP. Ingeniously, the MnPP could not only directly quench the photocurrent of PTCA, but also acted as hydrogen peroxide (HRP) mimicking enzyme to remarkably stimulate the deposition of benzo-4-chlorhexidine (4-CD) on electrode for further decreasing the photocurrent of PTCA, thereby obtaining a definitely low photocurrent for detection of TB. As a result, the proposed PEC aptasensor illustrated excellent sensitivity with a low detection limit down to 3 fM, exploiting a new avenue about intergrating two functions in one substance for ultrasensitive biological monitoring.
Collapse
Affiliation(s)
- Liaojing Huang
- Education Ministry Key Laboratory on Luminescence and Real-Time Analysis, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, People's Republic of China
| | - Li Zhang
- Education Ministry Key Laboratory on Luminescence and Real-Time Analysis, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, People's Republic of China
| | - Liu Yang
- Education Ministry Key Laboratory on Luminescence and Real-Time Analysis, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, People's Republic of China
| | - Ruo Yuan
- Education Ministry Key Laboratory on Luminescence and Real-Time Analysis, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, People's Republic of China.
| | - Yali Yuan
- Education Ministry Key Laboratory on Luminescence and Real-Time Analysis, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, People's Republic of China.
| |
Collapse
|
22
|
Peng H, Newbigging AM, Wang Z, Tao J, Deng W, Le XC, Zhang H. DNAzyme-Mediated Assays for Amplified Detection of Nucleic Acids and Proteins. Anal Chem 2017; 90:190-207. [DOI: 10.1021/acs.analchem.7b04926] [Citation(s) in RCA: 145] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Hanyong Peng
- Division of Analytical and Environmental
Toxicology, Department of Laboratory Medicine and Pathology, Faculty
of Medicine and Dentistry, University of Alberta, 10-102 Clinical
Sciences Building, Edmonton, Alberta T6G 2G3, Canada
| | - Ashley M. Newbigging
- Division of Analytical and Environmental
Toxicology, Department of Laboratory Medicine and Pathology, Faculty
of Medicine and Dentistry, University of Alberta, 10-102 Clinical
Sciences Building, Edmonton, Alberta T6G 2G3, Canada
| | - Zhixin Wang
- Division of Analytical and Environmental
Toxicology, Department of Laboratory Medicine and Pathology, Faculty
of Medicine and Dentistry, University of Alberta, 10-102 Clinical
Sciences Building, Edmonton, Alberta T6G 2G3, Canada
| | - Jeffrey Tao
- Division of Analytical and Environmental
Toxicology, Department of Laboratory Medicine and Pathology, Faculty
of Medicine and Dentistry, University of Alberta, 10-102 Clinical
Sciences Building, Edmonton, Alberta T6G 2G3, Canada
| | - Wenchan Deng
- Division of Analytical and Environmental
Toxicology, Department of Laboratory Medicine and Pathology, Faculty
of Medicine and Dentistry, University of Alberta, 10-102 Clinical
Sciences Building, Edmonton, Alberta T6G 2G3, Canada
| | - X. Chris Le
- Division of Analytical and Environmental
Toxicology, Department of Laboratory Medicine and Pathology, Faculty
of Medicine and Dentistry, University of Alberta, 10-102 Clinical
Sciences Building, Edmonton, Alberta T6G 2G3, Canada
| | - Hongquan Zhang
- Division of Analytical and Environmental
Toxicology, Department of Laboratory Medicine and Pathology, Faculty
of Medicine and Dentistry, University of Alberta, 10-102 Clinical
Sciences Building, Edmonton, Alberta T6G 2G3, Canada
| |
Collapse
|
23
|
Li J, Cao Y, Hinman SS, McKeating KS, Guan Y, Hu X, Cheng Q, Yang Z. Efficient label-free chemiluminescent immunosensor based on dual functional cupric oxide nanorods as peroxidase mimics. Biosens Bioelectron 2017; 100:304-311. [PMID: 28942213 DOI: 10.1016/j.bios.2017.09.011] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Revised: 09/06/2017] [Accepted: 09/08/2017] [Indexed: 11/26/2022]
Abstract
Dual-functional cupric oxide nanorods (CuONRs) as peroxidase mimics are proposed for the development of a flow-through, label-free chemiluminescent (CL) immunosensor. Forming the basis of this cost-efficient, label-free immunoassay, CuONRs, synthesized using a simple hydrothermal method, were deposited onto epoxy-activated standard glass slides, followed by immobilization of biotinylated capture antibodies through a streptavidin bridge. The CuONRs possess excellent catalytic activity, along with high stability as a solid support. Antigens could then be introduced to the sensing system, forming large immunocomplexes that prevent CL substrate access to the surface, thereby reducing the CL signal in a concentration dependent fashion. Using carcinoembryonic antigen (CEA) as a model analyte, the proposed label-free immunosensor was able to rapidly determine CEA with a wide linear range of 0.1-60ngmL-1 and a low detection limit of 0.05ngmL-1. This nanozyme-based immunosensor is simple, sensitive, cost-efficient, and has the potential to be a very promising platform for fast and efficient biosensing applications.
Collapse
Affiliation(s)
- Juan Li
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, PR China
| | - Yue Cao
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, PR China
| | - Samuel S Hinman
- Environmental Toxicology, University of California, Riverside, CA 92521, United States
| | - Kristy S McKeating
- Department of Chemistry, University of California, Riverside, CA 92521, United States
| | - Yiwen Guan
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, PR China
| | - Xiaoya Hu
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, PR China
| | - Quan Cheng
- Environmental Toxicology, University of California, Riverside, CA 92521, United States; Department of Chemistry, University of California, Riverside, CA 92521, United States.
| | - Zhanjun Yang
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, PR China.
| |
Collapse
|
24
|
Triggered hairpin switch and in situ nonlinear hybridization chain reaction enabling label-free electrochemiluminescent detection of BCR/ABL fusion gene. J Electroanal Chem (Lausanne) 2017. [DOI: 10.1016/j.jelechem.2017.07.050] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
25
|
Itel F, Schattling PS, Zhang Y, Städler B. Enzymes as key features in therapeutic cell mimicry. Adv Drug Deliv Rev 2017; 118:94-108. [PMID: 28916495 DOI: 10.1016/j.addr.2017.09.006] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2017] [Revised: 08/21/2017] [Accepted: 09/07/2017] [Indexed: 11/19/2022]
Abstract
Cell mimicry is a nature inspired concept that aims to substitute for missing or lost (sub)cellular function. This review focuses on the latest advancements in the use of enzymes in cell mimicry for encapsulated catalysis and artificial motility in synthetic bottom-up assemblies with emphasis on the biological response in cell culture or more rarely in animal models. Entities across the length scale from nano-sized enzyme mimics, sub-micron sized artificial organelles and self-propelled particles (swimmers) to micron-sized artificial cells are discussed. Although the field remains in its infancy, the primary aim of this review is to illustrate the advent of nature-mimicking artificial molecules and assemblies on their way to become a complementary alternative to their role models for diverse biomedical purposes.
Collapse
Affiliation(s)
- Fabian Itel
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Gustav Wieds Vej 14, Aarhus 8000, Denmark
| | - Philipp S Schattling
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Gustav Wieds Vej 14, Aarhus 8000, Denmark
| | - Yan Zhang
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Gustav Wieds Vej 14, Aarhus 8000, Denmark
| | - Brigitte Städler
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Gustav Wieds Vej 14, Aarhus 8000, Denmark.
| |
Collapse
|
26
|
|
27
|
Bi S, Yue S, Zhang S. Hybridization chain reaction: a versatile molecular tool for biosensing, bioimaging, and biomedicine. Chem Soc Rev 2017; 46:4281-4298. [DOI: 10.1039/c7cs00055c] [Citation(s) in RCA: 393] [Impact Index Per Article: 56.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
This review provides a comprehensive overview of the fundamental principles, analysis techniques, and application fields of hybridization chain reaction and its development status.
Collapse
Affiliation(s)
- Sai Bi
- Collaborative Innovation Center for Marine Biomass Fiber
- Materials and Textiles of Shandong Province
- College of Chemistry and Chemical Engineering
- Shandong Sino-Japanese Center for Collaborative Research of Carbon Nanomaterials
- Laboratory of Fiber Materials and Modern Textiles
| | - Shuzhen Yue
- Collaborative Innovation Center for Marine Biomass Fiber
- Materials and Textiles of Shandong Province
- College of Chemistry and Chemical Engineering
- Shandong Sino-Japanese Center for Collaborative Research of Carbon Nanomaterials
- Laboratory of Fiber Materials and Modern Textiles
| | - Shusheng Zhang
- Shandong Provincial Key Laboratory of Detection Technology for Tumor Makers
- College of Chemistry and Chemical Engineering
- Linyi University
- Linyi 276005
- P. R. China
| |
Collapse
|
28
|
Chen J, Tang L, Chu X, Jiang J. Enzyme-free, signal-amplified nucleic acid circuits for biosensing and bioimaging analysis. Analyst 2017; 142:3048-3061. [DOI: 10.1039/c7an00967d] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Enzyme-free, signal-amplified nucleic acid circuits utilize programmed assembly reactions between nucleic acid substrates to transduce a chemical input into an amplified detection signal.
Collapse
Affiliation(s)
- Jiyun Chen
- Institute of Chemical Biology and Nanomedicine
- State Key Laboratory of Chemeo/Bio-Sensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha
| | - Lijuan Tang
- Institute of Chemical Biology and Nanomedicine
- State Key Laboratory of Chemeo/Bio-Sensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha
| | - Xia Chu
- Institute of Chemical Biology and Nanomedicine
- State Key Laboratory of Chemeo/Bio-Sensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha
| | - Jianhui Jiang
- Institute of Chemical Biology and Nanomedicine
- State Key Laboratory of Chemeo/Bio-Sensing and Chemometrics
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha
| |
Collapse
|
29
|
DNA hybridization chain reaction and DNA supersandwich self-assembly for ultrasensitive detection. Sci China Chem 2016. [DOI: 10.1007/s11426-016-0262-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
30
|
Miao X, Ning X, Li Z, Cheng Z. Sensitive detection of miRNA by using hybridization chain reaction coupled with positively charged gold nanoparticles. Sci Rep 2016; 6:32358. [PMID: 27576601 PMCID: PMC5006024 DOI: 10.1038/srep32358] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2016] [Accepted: 08/04/2016] [Indexed: 01/21/2023] Open
Abstract
Positively charged gold nanoparticles (+)AuNPs can adsorb onto the negatively charged surface of single-stranded DNA (ssDNA) or double-stranded DNA (dsDNA). Herein, long-range dsDNA polymers could form based on the hybridization chain reaction (HCR) of two hairpin probes (H1 and H2) by using miRNA-21 as an initiator. (+)AuNPs could adsorb onto the negatively charged surface of such long-range dsDNA polymers based on the electrostatic adsorption, which directly resulted in the precipitation of (+)AuNPs and the decrease of (+)AuNPs absorption spectra. Under optimal conditions, miRNA-21 detection could be realized in the range of 20 pM-10 nM with a detection limit of 6.8 pM. In addition, (+)AuNPs used here are much more stable than commonly used negatively charged gold nanoparticles ((−)AuNPs) in mixed solution that contained salt, protein or other metal ions. Importantly, the assay could realize the detection of miRNA in human serum samples.
Collapse
Affiliation(s)
- Xiangmin Miao
- School of Life Science, Jiangsu Normal University, Xuzhou 221116, PR China
| | - Xue Ning
- KeWen College, JiangSu Normal University, Xuzhou 221116, PR China
| | - Zongbing Li
- School of Life Science, Jiangsu Normal University, Xuzhou 221116, PR China
| | - Zhiyuan Cheng
- School of Life Science, Jiangsu Normal University, Xuzhou 221116, PR China
| |
Collapse
|
31
|
Zhao J, Jing P, Xue S, Xu W. Dendritic structure DNA for specific metal ion biosensor based on catalytic hairpin assembly and a sensitive synergistic amplification strategy. Biosens Bioelectron 2016; 87:157-163. [PMID: 27551995 DOI: 10.1016/j.bios.2016.08.032] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2016] [Revised: 07/19/2016] [Accepted: 08/11/2016] [Indexed: 12/24/2022]
Abstract
In this work, a sensitive electrochemical biosensing to Pb2+ was proposed based on the high specificity of DNAzymes to Pb2+. The response signal was efficiently amplified by the catalytic hairpin assembly induced by strand replacement reaction and the formation of dendritic structure DNA (DSDNA) by layer-by-layer assembly. Firstly, in the presence of Pb2+, the substrate strand (S1) of the Pb2+-specific DNAzymes was specifically cleaved by Pb2+. Secondly, one of the two fragments (rS1) introduced into the electrode surface was hybridized with a hairpin DNA (H1) and further replaced by another hairpin DNA (H2) by the hybridization reaction of H1 with H2. The released rS1 then induced the next hybridization with H1. After repeated cycles, the catalytic recycling assembly of H2 with H1 was completed. Thirdly, two bioconjugates of Pt@Pd nanocages (Pt@PdNCs) labeled with DNA S3/S4 and electroactive toluidine blue (Tb) (Tb-S3-Pt@PdNCs and Tb-S4-Pt@PdNCs) were captured onto the resultant electrode surface through the hybridization of S3 and H2, S3 and S4, resulting in the formation of DSDNA triggered by layer-by-layer assembly. This formed DSDNA greatly facilitated the immobilization of manganese(III) meso-tetrakis (4-N-methylpyridiniumyl)-porphyrin (MnTMPyP) as mimicking enzyme. Under the synergistic catalysis of Pt@PdNCs and MnTMPyP to H2O2 reduction, the effective signal amplification of the developed Pb2+ biosensor was achieved. As a result, the sensitive detection of the proposed electrochemical strategy for Pb2+ was greatly improved in the range of 0.1pM-200nM with a detection limit of 0.033pM.
Collapse
Affiliation(s)
- Jianmin Zhao
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715 PR China
| | - Pei Jing
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715 PR China
| | - Shuyan Xue
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715 PR China
| | - Wenju Xu
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715 PR China.
| |
Collapse
|
32
|
Zhou X, Xue S, Jing P, Xu W. A sensitive impedimetric platform biosensing protein: Insoluble precipitates based on the biocatalysis of manganese(III) meso-tetrakis (4-N-methylpyridiniumyl)-porphyrinin in HCR-assisted dsDNA. Biosens Bioelectron 2016; 86:656-663. [PMID: 27471156 DOI: 10.1016/j.bios.2016.07.065] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2016] [Revised: 07/08/2016] [Accepted: 07/19/2016] [Indexed: 11/29/2022]
Abstract
In this study, a sensitive biosensing interface for protein was reported based on nonconductive insoluble precipitates (IPs) by the biocatalysis of manganese(III) meso-tetrakis (4-N-methylpyridiniumyl)-porphyrin (MnTMPyP), which was intercalated into formed double-strand DNA (dsDNA) scaffold triggered by hybridization chain reaction (HCR). In the proposed impedimetric aptasensor, carcinoembryonic antigen (CEA) and its aptamer were used as testing model. PtPd nanowires (PtPdNWs) with large surface area and superior conductivity were employed as nanocarriers to greatly immobilize biomolecules (e.g. CEA aptamers). Then, two DNA hairpins H1 and H2 were introduced to trigger HCR with the assistance of DNA initiator, resulting in the formation of a long dsDNA scaffold. Meanwhile, mimicking enzyme MnTMPyP molecules were embedded into the resultant dsDNA, in situ generating the complex MnTMPyP-dsDNA with peroxidase-like activity. Under the biocatalysis of MnTMPyP-dsDNA, 3,3-diaminobenzidine (DAB) was oxidized to form nonconductive IPs. As a result, the electron transfer between electrode interface and redox probe was vastly hindered, leading to the significant amplification of electrochemical impedimetric signal. So, greatly improved analytical performances of the proposed aptasensor were achieved with a detection limit as low as 0.030pgmL(-1). And the successful assay of CEA in human serum samples enabled the developed biosensing platform to have promising potential in bioanalysis.
Collapse
Affiliation(s)
- Xingxing Zhou
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715 PR China
| | - Shuyan Xue
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715 PR China
| | - Pei Jing
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715 PR China
| | - Wenju Xu
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715 PR China.
| |
Collapse
|
33
|
Fernández L, Esteves VI, Cunha Â, Schneider RJ, Tomé JP. Photodegradation of organic pollutants in water by immobilized porphyrins and phthalocyanines. J PORPHYR PHTHALOCYA 2016. [DOI: 10.1142/s108842461630007x] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
New methods for water treatment are required as a result from an increasing awareness in the reduction of the pollution impact in the environment. In the perspective of the photo-oxidation of organic pollutants present in water, the principal incentive for the preparation of heterogeneous photocatalysts is their easy recovery from the reaction mixture, which allows their reuse in successive runs, minimizing the loss of their original photocatalytic properties. Different types of supports can be used in the immobilization of photoactive species, such as porphyrins (Pors) and phthalocyanines (Pcs). This mini-review will consider the different methodologies for the immobilization of Pors and Pcs and their photocatalytic performance in the photodegradation of organic pollutants in water, addressing also their recycling ability in successive water treatments.
Collapse
Affiliation(s)
- Lucía Fernández
- QOPNA, and Department of Chemistry, University of Aveiro, Aveiro, 3810-193, Portugal
- CESAM and Department of Chemistry, University of Aveiro, Aveiro, 3810-193, Portugal
- Department of Biology & CESAM, University of Aveiro, Aveiro, 3810-193, Portugal
| | - Valdemar I. Esteves
- CESAM and Department of Chemistry, University of Aveiro, Aveiro, 3810-193, Portugal
| | - Ângela Cunha
- Department of Biology & CESAM, University of Aveiro, Aveiro, 3810-193, Portugal
| | - Rudolf J. Schneider
- BAM Federal Institute for Materials Research and Testing, Berlin, D-12205, Germany
| | - João P.C. Tomé
- QOPNA, and Department of Chemistry, University of Aveiro, Aveiro, 3810-193, Portugal
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001, Lisboa, Portugal
- Department of Organic and Macromolecular Chemistry, Ghent University, Gent, B-9000, Belgium
| |
Collapse
|
34
|
Yang Z, Cao Y, Li J, Lu M, Jiang Z, Hu X. Smart CuS Nanoparticles as Peroxidase Mimetics for the Design of Novel Label-Free Chemiluminescent Immunoassay. ACS APPLIED MATERIALS & INTERFACES 2016; 8:12031-12038. [PMID: 27137349 DOI: 10.1021/acsami.6b02481] [Citation(s) in RCA: 73] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
In the present work, a novel label-free chemiluminescent (CL) immunoassay method was designed by employing smart CuS nanoparticles (CuSNPs) as peroxidase mimetics. The CuSNPs were synthesized through a simple coprecipitation method, and showed high catalytic activity and stability. This efficient label-free CL immunoassay could be easily achieved through a simple strategy. First, CuSNPs dispersed in chitosan were modified on the epoxy-functionalized glass slide to form a solid CL signal interface. Streptavidin was then used to functionalize CuSNPs to capture the biotinylated antibody, further producing a sensing interface. After online incubation with antigen molecules, the formed antibody-antigen complex on the biosensing substrate could prevent the diffusion channel of CL substrate toward the signal interface, and restrained the mimic enzyme-catalyzed CL reaction, finally resulting in the decrease of CL signals of the assay system. Compared to the label-based CL immunoassay, the proposed label-free assay mode is more simple, cheap and fast. Using a model analyte alpha-fetoprotein, the label-free CL immunoassay method had a linear range of 0.1-60 ng/mL and a low detection limit of 0.07 ng/mL. Moreover, the peroxidase mimetic-based label-free CL immunoassay system showed good specificity, acceptable repeatability, and good accuracy. The study provided a promising strategy for the development of highly efficient label-free CL immunoassay system.
Collapse
Affiliation(s)
- Zhanjun Yang
- School of Chemistry and Chemical Engineering, Yangzhou University , Yangzhou 225002, P.R. China
| | - Yue Cao
- School of Chemistry and Chemical Engineering, Yangzhou University , Yangzhou 225002, P.R. China
| | - Juan Li
- School of Chemistry and Chemical Engineering, Yangzhou University , Yangzhou 225002, P.R. China
| | - Mimi Lu
- School of Chemistry and Chemical Engineering, Yangzhou University , Yangzhou 225002, P.R. China
| | - Zhikang Jiang
- School of Chemistry and Chemical Engineering, Yangzhou University , Yangzhou 225002, P.R. China
| | - Xiaoya Hu
- School of Chemistry and Chemical Engineering, Yangzhou University , Yangzhou 225002, P.R. China
| |
Collapse
|
35
|
Cheng H, Zhang L, He J, Guo W, Zhou Z, Zhang X, Nie S, Wei H. Integrated Nanozymes with Nanoscale Proximity for in Vivo Neurochemical Monitoring in Living Brains. Anal Chem 2016; 88:5489-97. [DOI: 10.1021/acs.analchem.6b00975] [Citation(s) in RCA: 244] [Impact Index Per Article: 30.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Hanjun Cheng
- College
of Engineering and Applied Sciences, Nanjing National
Laboratory of Microstructures, Nanjing University, Nanjing, Jiangsu 210093, China
- Collaborative
Innovation Center of Chemistry for Life Sciences, State Key Laboratory
of Analytical Chemistry for Life Science, Nanjing University, Nanjing, Jiangsu 210093, China
| | - Lei Zhang
- College
of Engineering and Applied Sciences, Nanjing National
Laboratory of Microstructures, Nanjing University, Nanjing, Jiangsu 210093, China
| | - Jian He
- Department
of Radiology, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, Jiangsu 210008, China
| | - Wenjing Guo
- College
of Engineering and Applied Sciences, Nanjing National
Laboratory of Microstructures, Nanjing University, Nanjing, Jiangsu 210093, China
| | - Zhengyang Zhou
- Department
of Radiology, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, Jiangsu 210008, China
| | - Xuejin Zhang
- College
of Engineering and Applied Sciences, Nanjing National
Laboratory of Microstructures, Nanjing University, Nanjing, Jiangsu 210093, China
| | - Shuming Nie
- College
of Engineering and Applied Sciences, Nanjing National
Laboratory of Microstructures, Nanjing University, Nanjing, Jiangsu 210093, China
- Department
of Biomedical Engineering, Emory University, Atlanta, Georgia 30322, United States
| | - Hui Wei
- College
of Engineering and Applied Sciences, Nanjing National
Laboratory of Microstructures, Nanjing University, Nanjing, Jiangsu 210093, China
- Collaborative
Innovation Center of Chemistry for Life Sciences, State Key Laboratory
of Analytical Chemistry for Life Science, Nanjing University, Nanjing, Jiangsu 210093, China
| |
Collapse
|
36
|
Kuah E, Toh S, Yee J, Ma Q, Gao Z. Enzyme Mimics: Advances and Applications. Chemistry 2016; 22:8404-30. [PMID: 27062126 DOI: 10.1002/chem.201504394] [Citation(s) in RCA: 179] [Impact Index Per Article: 22.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2015] [Indexed: 12/29/2022]
Abstract
Enzyme mimics or artificial enzymes are a class of catalysts that have been actively pursued for decades and have heralded much interest as potentially viable alternatives to natural enzymes. Aside from having catalytic activities similar to their natural counterparts, enzyme mimics have the desired advantages of tunable structures and catalytic efficiencies, excellent tolerance to experimental conditions, lower cost, and purely synthetic routes to their preparation. Although still in the midst of development, impressive advances have already been made. Enzyme mimics have shown immense potential in the catalysis of a wide range of chemical and biological reactions, the development of chemical and biological sensing and anti-biofouling systems, and the production of pharmaceuticals and clean fuels. This Review concerns the development of various types of enzyme mimics, namely polymeric and dendrimeric, supramolecular, nanoparticulate and proteinic enzyme mimics, with an emphasis on their synthesis, catalytic properties and technical applications. It provides an introduction to enzyme mimics and a comprehensive summary of the advances and current standings of their applications, and seeks to inspire researchers to perfect the design and synthesis of enzyme mimics and to tailor their functionality for a much wider range of applications.
Collapse
Affiliation(s)
- Evelyn Kuah
- Department of Chemistry, National University of Singapore, Singapore, 117543, Fax
| | - Seraphina Toh
- Department of Chemistry, National University of Singapore, Singapore, 117543, Fax
| | - Jessica Yee
- Department of Chemistry, National University of Singapore, Singapore, 117543, Fax
| | - Qian Ma
- Department of Chemistry, National University of Singapore, Singapore, 117543, Fax
| | - Zhiqiang Gao
- Department of Chemistry, National University of Singapore, Singapore, 117543, Fax.
| |
Collapse
|
37
|
A plasmonic colorimetric strategy for biosensing through enzyme guided growth of silver nanoparticles on gold nanostars. Biosens Bioelectron 2016; 78:267-273. [DOI: 10.1016/j.bios.2015.11.056] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2015] [Revised: 10/30/2015] [Accepted: 11/18/2015] [Indexed: 12/18/2022]
|
38
|
Ge L, Wang W, Sun X, Hou T, Li F. Affinity-Mediated Homogeneous Electrochemical Aptasensor on a Graphene Platform for Ultrasensitive Biomolecule Detection via Exonuclease-Assisted Target-Analog Recycling Amplification. Anal Chem 2016; 88:2212-9. [PMID: 26813733 DOI: 10.1021/acs.analchem.5b03844] [Citation(s) in RCA: 72] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
As is well-known, graphene shows a remarkable difference in affinity toward nonstructured single-stranded (ss) DNA and double-stranded (ds) DNA. This property makes it popular to prepare DNA-based optical sensors. In this work, taking this unique property of graphene in combination with the sensitive electrochemical transducer, we report a novel affinity-mediated homogeneous electrochemical aptasensor using graphene modified glassy carbon electrode (GCE) as the sensing platform. In this approach, the specific aptamer-target recognition is converted into an ultrasensitive electrochemical signal output with the aid of a novel T7 exonuclease (T7Exo)-assisted target-analog recycling amplification strategy, in which the ingeniously designed methylene blue (MB)-labeled hairpin DNA reporters are digested in the presence of target and, then, converted to numerous MB-labeled long ssDNAs. The distinct difference in differential pulse voltammetry response between the designed hairpin reporters and the generated long ssDNAs on the graphene/GCE allows ultrasensitive detection of target biomolecules. Herein, the design and working principle of this homogeneous electrochemical aptasensor were elucidated, and the working conditions were optimized. The gel electrophoresis results further demonstrate that the designed T7Exo-assisted target-analog recycling amplification strategy can work well. This electrochemical aptasensor realizes the detection of biomolecule in a homogeneous solution without immobilization of any bioprobe on electrode surface. Moreover, this versatile homogeneous electrochemical sensing system was used for the determination of biomolecules in real serum samples with satisfying results.
Collapse
Affiliation(s)
- Lei Ge
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University , Qingdao 266109, People's Republic of China
| | - Wenxiao Wang
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University , Qingdao 266109, People's Republic of China
| | - Ximei Sun
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University , Qingdao 266109, People's Republic of China
| | - Ting Hou
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University , Qingdao 266109, People's Republic of China
| | - Feng Li
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University , Qingdao 266109, People's Republic of China
| |
Collapse
|
39
|
Konopińska K, Pietrzak M, Mazur R, Malinowska E. Analytical characterization of IgG–cTpp and IgG–Mn-cTpp conjugates. J PORPHYR PHTHALOCYA 2016. [DOI: 10.1142/s1088424615500984] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Herein, the conjugation of carboxylated tetraphenylporphyrin or its derivative containing manganese cation and model protein — immunoglobulin G is presented. The obtained IgG–cTpp and IgG–Mn-cTpp conjugates were subsequently used for model immunoassays construction. The IgG–cTpp formation was confirmed using size-exclusion chromatography. Thanks to the unique properties of applied labels the assay analysis was carried out with both spectrophotometric and spectrofluorimetric detection. The assays were performed creating semi-quantitative detection system using 96-well plates. The incubation time, ensuring full saturation of the surface with secondary antibodies was also optimized. Moreover, in the case of IgG–Mn-cTpp conjugates we present the possibility of both direct and indirect determination of the label, the latter based on the catalytic activity of Mn-cTpp, which allows for amplification of the measured signal. We proved that both cTpp and Mn-cTpp may be successfully used for protein labeling and serve as universal tracers for various formats of affinity assays and sensors.
Collapse
Affiliation(s)
- Kamila Konopińska
- Department of Microbioanalytics, Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland
| | - Mariusz Pietrzak
- Department of Microbioanalytics, Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland
| | - Radosław Mazur
- Department of Metabolic Regulation, Institute of Biochemistry, Faculty of Biology, University of Warsaw, Miecznikowa 1, 02-096 Warsaw, Poland
| | - Elżbieta Malinowska
- Department of Microbioanalytics, Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland
| |
Collapse
|
40
|
OHTOMO T, YOKOYAMA A, KONNO M, OHNO O, IGARASHI S, TAKAGAI Y. β-Cyclodextrin as a Metal-anionic Porphyrin Complexation Accelerator in Aqueous Media. ANAL SCI 2016; 32:623-9. [DOI: 10.2116/analsci.32.623] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Takao OHTOMO
- Faculty of Symbiotic Systems Science, Fukushima University
| | - Aya YOKOYAMA
- Institute of Environmental Radioactivity, Fukushima University
| | | | - Osamu OHNO
- Department of Biomolecular Functional Engineering, College of Engineering, Ibaraki University
| | - Shukuro IGARASHI
- Department of Biomolecular Functional Engineering, College of Engineering, Ibaraki University
| | - Yoshitaka TAKAGAI
- Faculty of Symbiotic Systems Science, Fukushima University
- Institute of Environmental Radioactivity, Fukushima University
| |
Collapse
|
41
|
Wang X, Hu Y, Wei H. Nanozymes in bionanotechnology: from sensing to therapeutics and beyond. Inorg Chem Front 2016. [DOI: 10.1039/c5qi00240k] [Citation(s) in RCA: 430] [Impact Index Per Article: 53.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Nanozymes are nanomaterials with enzyme-like characteristics, which have found broad applications in various areas including bionanotechnology and beyond.
Collapse
Affiliation(s)
- Xiaoyu Wang
- Department of Biomedical Engineering
- College of Engineering and Applied Sciences
- Collaborative Innovation Center of Chemistry for Life Sciences
- Nanjing National Laboratory of Microstructures
- Nanjing University
| | - Yihui Hu
- Department of Biomedical Engineering
- College of Engineering and Applied Sciences
- Collaborative Innovation Center of Chemistry for Life Sciences
- Nanjing National Laboratory of Microstructures
- Nanjing University
| | - Hui Wei
- Department of Biomedical Engineering
- College of Engineering and Applied Sciences
- Collaborative Innovation Center of Chemistry for Life Sciences
- Nanjing National Laboratory of Microstructures
- Nanjing University
| |
Collapse
|
42
|
Deng S, Zhang T, Ji X, Wan Y, Xin P, Shan D, Zhang X. Detection of zinc finger protein (EGR1) based on electrogenerated chemiluminescence from singlet oxygen produced in a nanoclay-supported porphyrin environment. Anal Chem 2015; 87:9155-62. [PMID: 26301820 DOI: 10.1021/acs.analchem.5b01318] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Early growth response protein 1 (EGR1), as a characteristic example of zinc finger proteins, acts as a transcription factor in eukaryotic cells, mediating protein-protein interactions. Here, a novel electrochemiluminescence (ECL)-based protocol for EGR1 assay was developed with a new eco-friendly emitter: singlet oxygen produced in the vicinity of nanoclay-supported zinc proto-porphyrin IX (ZnPPIX). Its electrochemical reduction stimulates an intense monochromic CL irradiation at 644 nm from the dissolved oxygen as endogenous coreactant in the aqueous solution. This ECL derivation was rationalized via hyphenated spectroscopy and theoretical calculation. To promote hydrophilicity and solid-state immobilization of porphyrins, the lamellar artificial laponite was employed as a nanocarrier owning to its large specific area without the blackbody effect. The facile exfoliation of laponite produced quality monolayered nanosheets and facilitated the adsorption and flattening of PPIX upon the surface, resulting in a highly efficient ECL emission. Based on the release of Zn(2+) in zinc finger domains of EGR1 upon contact with the ECL-inactive PPIX, which was monitored by circular dichroism and UV-absorption, a sensitive Zn(2+)-selective electrode for the "signal-on" detection of EGR1 was prepared with a detection limit down to 0.48 pg mL(-1) and a linearity over 6 orders of magnitude. The proposed porphyrin-based ECL system thus infused fresh blood into the traditional ECL family, showing great promise in bioassays of structural Zn(II) proteins and zinc finger-binding nucleotides.
Collapse
Affiliation(s)
- Shengyuan Deng
- Sino-French Laboratory of Biomaterials and Bioanalytical Chemistry, School of Environmental and Biological Engineering, Nanjing University of Science and Technology , Nanjing 210094, P. R. China
| | - Tingting Zhang
- Sino-French Laboratory of Biomaterials and Bioanalytical Chemistry, School of Environmental and Biological Engineering, Nanjing University of Science and Technology , Nanjing 210094, P. R. China
| | - Xubo Ji
- Sino-French Laboratory of Biomaterials and Bioanalytical Chemistry, School of Environmental and Biological Engineering, Nanjing University of Science and Technology , Nanjing 210094, P. R. China
| | - Ying Wan
- Sino-French Laboratory of Biomaterials and Bioanalytical Chemistry, School of Environmental and Biological Engineering, Nanjing University of Science and Technology , Nanjing 210094, P. R. China.,Intelligent Microsystem Technology and Engineering Center, School of Mechanical Engineering, Nanjing University of Science and Technology , Nanjing 210094, P. R. China
| | - Peng Xin
- Sino-French Laboratory of Biomaterials and Bioanalytical Chemistry, School of Environmental and Biological Engineering, Nanjing University of Science and Technology , Nanjing 210094, P. R. China
| | - Dan Shan
- Sino-French Laboratory of Biomaterials and Bioanalytical Chemistry, School of Environmental and Biological Engineering, Nanjing University of Science and Technology , Nanjing 210094, P. R. China
| | - Xueji Zhang
- Sino-French Laboratory of Biomaterials and Bioanalytical Chemistry, School of Environmental and Biological Engineering, Nanjing University of Science and Technology , Nanjing 210094, P. R. China
| |
Collapse
|
43
|
Zheng Y, Yuan Y, Chai Y, Yuan R. l-cysteine induced manganese porphyrin electrocatalytic amplification with 3D DNA-Au@Pt nanoparticles as nanocarriers for sensitive electrochemical aptasensor. Biosens Bioelectron 2015; 79:86-91. [PMID: 26700580 DOI: 10.1016/j.bios.2015.07.042] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2015] [Revised: 07/10/2015] [Accepted: 07/20/2015] [Indexed: 12/21/2022]
Abstract
We successfully applied the novel l-cysteine (RSH) induced manganese porphyrin (MnTPP) electrocatalytic amplification in electrochemical aptasensor for detection of thrombin (TB) with the 3D DNA-Au@Pt nanoparticles (DNA-Au@Pt NPs) as nanocarrier. A further discussion for the suggested mechanism of the reaction involved the MnTPP-catalyzed oxidation of thiols (RSH) to disulfides l-cystine (RSSR) was also discussed in detail in this work. In comparison with traditional H2O2 mediated MnTPP electrocatalytic amplification, the novel reaction with more stable catalytic substrate RSH possessed high catalytic amplification efficiency. In addition, the 3D DNA-Au@Pt NPs could provide abundant binding sites for immobilizing signal tags and enzymes. As a result, the electrochemical signal can be greatly enhanced by the RSH mediated MnTPP electrocatalytic reaction and 3D DNA-Au@Pt NPs. Under optimal conditions, the proposed aptasensor exhibited a wider linear range of 0.1 pM-100 nM with a more sensitive detection limit of 29 fM for TB detection.
Collapse
Affiliation(s)
- Yingning Zheng
- Education Ministry Key Laboratory on Luminescence and Real-Time Analysis, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, People's Republic of China
| | - Yali Yuan
- Education Ministry Key Laboratory on Luminescence and Real-Time Analysis, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, People's Republic of China
| | - Yaqin Chai
- Education Ministry Key Laboratory on Luminescence and Real-Time Analysis, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, People's Republic of China.
| | - Ruo Yuan
- Education Ministry Key Laboratory on Luminescence and Real-Time Analysis, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, People's Republic of China.
| |
Collapse
|
44
|
Ding J, Gu Y, Li F, Zhang H, Qin W. DNA Nanostructure-Based Magnetic Beads for Potentiometric Aptasensing. Anal Chem 2015; 87:6465-9. [PMID: 26044085 DOI: 10.1021/acs.analchem.5b01576] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
In this work, a simple, general, and sensitive potentiometric platform is presented, which allows potentiometric sensing to be applied to any class of molecule irrespective of the analyte charge. DNA nanostructures are self-assembled on magnetic beads via the incorporation of an aptamer into a hybridization chain reaction. The aptamer-target binding event leads to the disassembly of the DNA nanostructures, which results in a dramatic change in the surface charge of the magnetic beads. Such a surface charge change can be sensitively detected by a polycation-sensitive membrane electrode using protamine as an indicator. With an endocrine disruptor bisphenol A as a model, the proposed potentiometric method shows a wide linear range from 0.1 to 100 nM with a low detection limit of 80 pM (3σ). The proposed sensing strategy will lay a foundation for the development of potentiometric sensors for highly sensitive and selective detection of various targets.
Collapse
Affiliation(s)
- Jiawang Ding
- Key Laboratory of Coastal Environmental Processes and Ecological Remediation and Shandong Provincial Key Laboratory of Coastal Environmental Processes, Yantai Institute of Coastal Zone Research (YIC), Chinese Academy of Sciences (CAS), Yantai, Shandong 264003, P. R. China
| | - Yue Gu
- Key Laboratory of Coastal Environmental Processes and Ecological Remediation and Shandong Provincial Key Laboratory of Coastal Environmental Processes, Yantai Institute of Coastal Zone Research (YIC), Chinese Academy of Sciences (CAS), Yantai, Shandong 264003, P. R. China
| | - Fei Li
- Key Laboratory of Coastal Environmental Processes and Ecological Remediation and Shandong Provincial Key Laboratory of Coastal Environmental Processes, Yantai Institute of Coastal Zone Research (YIC), Chinese Academy of Sciences (CAS), Yantai, Shandong 264003, P. R. China
| | - Hongxia Zhang
- Key Laboratory of Coastal Environmental Processes and Ecological Remediation and Shandong Provincial Key Laboratory of Coastal Environmental Processes, Yantai Institute of Coastal Zone Research (YIC), Chinese Academy of Sciences (CAS), Yantai, Shandong 264003, P. R. China
| | - Wei Qin
- Key Laboratory of Coastal Environmental Processes and Ecological Remediation and Shandong Provincial Key Laboratory of Coastal Environmental Processes, Yantai Institute of Coastal Zone Research (YIC), Chinese Academy of Sciences (CAS), Yantai, Shandong 264003, P. R. China
| |
Collapse
|
45
|
Tao M, Shi Z, Cheng R, Zhang J, Li B, Jin Y. Highly specific fluorescence detection of T4 polynucleotide kinase activity via photo-induced electron transfer. Anal Biochem 2015; 485:18-24. [PMID: 26050629 DOI: 10.1016/j.ab.2015.05.024] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2015] [Revised: 05/10/2015] [Accepted: 05/31/2015] [Indexed: 10/23/2022]
Abstract
Sensitive and reliable study of the activity of polynucleotide kinase (PNK) and its potential inhibitors is of great importance for biochemical interaction related to DNA phosphorylation as well as development of kinase-targeted drug discovery. To achieve facile and reliable detection of PNK activity, we report here a novel fluorescence method for PNK assay based on a combination of exonuclease cleavage reaction and photo-induced electron transfer (PIET) by using T4 PNK as a model target. The fluorescence of 3'-carboxyfluorescein-labeled DNA probe (FDNA) is effectively quenched by deoxyguanosines at the 5' end of its complementary DNA (cDNA) due to an effective PIET between deoxyguanosines and fluorophore. Whereas FDNA/cDNA hybrid is phosphorylated by PNK and then immediately cleaved by lambda exonuclease (λ exo), fluorescence is greatly restored due to the break of PIET. This homogeneous PNK activity assay does not require a complex design by taking advantage of the quenching ability of deoxyguanosines, making the proposed strategy facile and cost-effective. The activity of PNK can be sensitively detected in the range of 0.005 to 10 U mL(-1) with a detection limit of 2.1×10(-3) U mL(-1). Research on inhibition efficiency of different inhibitors demonstrated that it can be explored to evaluate inhibition capacity of inhibitors. The application for detection of PNK activity in complex matrix achieved satisfactory results. Therefore, this PIET strategy opens a promising avenue for studying T4 PNK activity as well as evaluating PNK inhibitors, which is of great importance for discovering kinase-targeted drugs.
Collapse
Affiliation(s)
- Mangjuan Tao
- 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 710119, China
| | - Zhilu Shi
- 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 710119, China
| | - Rui Cheng
- 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 710119, China
| | - Jing Zhang
- 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 710119, 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 710119, 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 710119, China.
| |
Collapse
|
46
|
Chen C, Liu Y, Zheng Z, Zhou G, Ji X, Wang H, He Z. A new colorimetric platform for ultrasensitive detection of protein and cancer cells based on the assembly of nucleic acids and proteins. Anal Chim Acta 2015; 880:1-7. [DOI: 10.1016/j.aca.2015.05.010] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2015] [Revised: 05/05/2015] [Accepted: 05/07/2015] [Indexed: 11/26/2022]
|
47
|
Xie S, Chai Y, Yuan Y, Yuan R. Manganese porphyrin-double stranded DNA complex guided in situ deposition of polyaniline for electrochemical thrombin detection. Chem Commun (Camb) 2015; 50:7169-72. [PMID: 24852238 DOI: 10.1039/c4cc02608j] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this work, we proposed a novel electrochemical strategy for sensitive detection of thrombin (TB) based on in situ generation of polyaniline (PANI) as a redox mediator by using a manganese porphyrin-double stranded DNA (MnTMPyP-dsDNA) peroxidase-like artificial enzyme mimic as a powerful catalyst and template.
Collapse
Affiliation(s)
- Shunbi Xie
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, P. R. China.
| | | | | | | |
Collapse
|
48
|
Guo Y, Wu J, Ju H. Target-driven DNA association to initiate cyclic assembly of hairpins for biosensing and logic gate operation. Chem Sci 2015; 6:4318-4323. [PMID: 29218202 PMCID: PMC5707516 DOI: 10.1039/c5sc01215e] [Citation(s) in RCA: 73] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2015] [Accepted: 05/11/2015] [Indexed: 01/22/2023] Open
Abstract
Target-driven DNA association is designed for initiating the cyclic assembly of hairpins for target detection and logic gate operation.
A target-driven DNA association was designed to initiate cyclic assembly of hairpins, which led to an enzyme-free amplification strategy for detection of a nucleic acid or aptamer substrate and flexible construction of logic gates. The cyclic system contained two ssDNA (S1 and S2) and two hairpins (H1 and H2). These ssDNA could co-recognize the target to produce an S1–target–S2 structure, which brought their toehold and branch-migration domains into close proximity to initiate the cyclic assembly of hairpins. The assembly product further induced the dissociation of a double-stranded probe DNA (Q:F) via toehold-mediated strand displacement to switch the fluorescence signal. This method could detect DNA and ATP as model analytes down to 21.6 pM and 38 nM, respectively. By designing different DNA input strands, the “AND”, “INHIBIT” and “NAND” logic gates could be activated to achieve the output signal. The proposed biosensing and logic gate operation platform showed potential applications in disease diagnosis.
Collapse
Affiliation(s)
- Yuehua Guo
- State Key Laboratory of Analytical Chemistry for Life Science , School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210093 , P. R. China . ; ; Tel: +86 25 83593593
| | - Jie Wu
- State Key Laboratory of Analytical Chemistry for Life Science , School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210093 , P. R. China . ; ; Tel: +86 25 83593593
| | - Huangxian Ju
- State Key Laboratory of Analytical Chemistry for Life Science , School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210093 , P. R. China . ; ; Tel: +86 25 83593593
| |
Collapse
|
49
|
Zang Y, Lei J, Ling P, Ju H. Catalytic Hairpin Assembly-Programmed Porphyrin–DNA Complex as Photoelectrochemical Initiator for DNA Biosensing. Anal Chem 2015; 87:5430-6. [DOI: 10.1021/acs.analchem.5b00888] [Citation(s) in RCA: 101] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Yang Zang
- State Key Laboratory of Analytical
Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China
| | - Jianping Lei
- State Key Laboratory of Analytical
Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China
| | - Pinghua Ling
- State Key Laboratory of Analytical
Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China
| | - Huangxian Ju
- State Key Laboratory of Analytical
Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China
| |
Collapse
|
50
|
An enzyme-free and label-free fluorescent biosensor for small molecules by G-quadruplex based hybridization chain reaction. Talanta 2015; 138:15-19. [PMID: 25863365 DOI: 10.1016/j.talanta.2015.02.002] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2014] [Revised: 01/24/2015] [Accepted: 02/01/2015] [Indexed: 11/23/2022]
Abstract
An enzyme-free and label-free fluorescent biosensor is developed by G-quadruplex-based hybridization chain reaction (HCR) for small molecules, using adenosine triphosphate (ATP) as the model. Aptamer probes for the recognition of small molecules are hybridized with blocking probes. The G-quadruplex sequences are incorporated into one of the two HCR hairpin probes. In the presence of small molecules (ATP), the formation of aptamer-ATP bioaffinity complexes induces the release of blocking probes; the released blocking probes initiate HCR and numerous G-quadruplexes along DNA nanowires are self-assembled after the HCR process. Using N-methyl mesoporphyrin IX (NMM) as the fluorophore, a "turn-on" fluorescence response can be achieved and detected as low as 15 μmol L(-1) of ATP. This biosensor is applied to detect ATP in biologic samples with satisfactory results.
Collapse
|