1
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Yin Z, Li S, Liu X, Yuan R, Xiang Y. A metal ion-coordinated DNA probe for sensitive fluorescence detection of metallothionein via a dual nucleic acid amplification strategy. Dalton Trans 2023; 52:18473-18479. [PMID: 38014455 DOI: 10.1039/d3dt03346e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2023]
Abstract
Sensitively monitoring metallothionein (MT), a heavy metal-binding protein with substantial cysteine content, is of significance for evaluating heavy metal poisoning in both humans and animals. Based on a new metal ion-coordinated DNA probe and the heavy metal ion binding capability of MT, as well as the substantial signal enhancement of the hybridization chain reaction (HCR) and rolling circle amplification (RCA), we demonstrate a highly sensitive fluorescence MT detection assay. MT binds the metal ions in the hairpin structured, metal ion-coordinated DNA probe to switch its hairpin structure into ssDNA, which triggers subsequent RCA reactions and HCRs to open plenty of fluorescently quenched signal hairpins to exhibit drastically amplified fluorescence recovery for assaying MT down to 0.58 nM within a dynamic range of 1-320 nM. In addition, the investigation of low contents of MT in diluted human serum by such an assay has also been verified, indicating its promising application potential for diagnosing heavy metal poisoning.
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Affiliation(s)
- Zihao Yin
- Key Laboratory of Luminescence Analysis and Molecular Sensing, Ministry of Education, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China.
| | - Shunmei Li
- Key Laboratory of Luminescence Analysis and Molecular Sensing, Ministry of Education, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China.
| | - Xiaoju Liu
- Key Laboratory of Luminescence Analysis and Molecular Sensing, Ministry of Education, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China.
| | - Ruo Yuan
- Key Laboratory of Luminescence Analysis and Molecular Sensing, Ministry of Education, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China.
| | - Yun Xiang
- Key Laboratory of Luminescence Analysis and Molecular Sensing, Ministry of Education, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China.
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2
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A novel peptide-based fluorescent probe for highly selective detection of mercury (II) ions in real water samples and living cells based on aggregation-induced emission effect. Anal Bioanal Chem 2022; 414:4717-4726. [PMID: 35589864 DOI: 10.1007/s00216-022-04094-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Revised: 04/10/2022] [Accepted: 04/20/2022] [Indexed: 11/01/2022]
Abstract
A new fluorescent probe TPE-GHK was synthesized containing a tetrastyrene (TPE) derivative as fluorophore and classical tripeptide (Gly-His-Lys-NH2) as a receptor based on the aggregation-induced emission (AIE) mechanism. TPE-GHK displayed high selectivity and rapid fluorescent "turn-on" response to Hg2+ among other competitive metal ions. The 2:1 complex binding mechanism of TPE-GHK toward Hg2+ was verified by fluorometric titration, Job's plots, and ESI-HRMS spectra. The fluorescent emission showed a good linear response in the range of 0-1.0 μM with the low detection limit of 28.6 nM. Meanwhile, TPE-GHK exhibited the excellent biocompatibility and low toxicity and was successfully applied in monitoring Hg2+ in living CAKI 2 cells, which demonstrated its potential application in environment and biological science. More importantly, TPE-GHK could be used to detect Hg2+ in two real water samples and also was successfully designed as test strips.
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3
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Saqib M, Bashir S, Ali S, Hao R. Highly selective and sensitive detection of mercury (II) and dopamine based on the efficient electrochemiluminescence of Ru(bpy)32+ with acridine orange as a coreactant. J Electroanal Chem (Lausanne) 2022. [DOI: 10.1016/j.jelechem.2021.115896] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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4
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Zhou Z, Ding Y, Si S, Wu W, Deng C, Wu H, Xiang J. Wide-field determination of aqueous mercury(II) based on tail-extensible DNA fluorescent probe with tunable dynamic range. JOURNAL OF HAZARDOUS MATERIALS 2021; 417:125975. [PMID: 33992009 DOI: 10.1016/j.jhazmat.2021.125975] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Revised: 04/16/2021] [Accepted: 04/22/2021] [Indexed: 06/12/2023]
Abstract
Mercury (Hg) is one of the most hazardous pollutants, widely distributed in water, atmosphere, and soil, while the Hg contents from different sources are greatly different. Until now, numerous reported methods are only suitable for a kind of sample because they cannot reconcile sensitivity and linear range. In this work, a tail-extensible DNA fluorescent probe for "turn on" detection of Hg2+ with tunable dynamic range and high sensitivity was developed, which was based on segmental hybridization between silver nanoclusters (AgNCs)-covered DNA and different guanine-rich DNAs. By adding adenine-guanine-cytosine (AGC) base repeats as a tail of the guanine-rich DNA, the formation constant of T-Hg2+-T complex was effectively modulated within two orders of magnitude. Based on it, a tunable dynamic range from 0.035 to 0.2 pM to 8.0-120.0 pM was achieved by combining four fluorescent probes with different tail lengths. The Hg2+contents from different sources were successfully measured. This evidenced the proposed sensor's application toward wide-field detection, which is useful for the direct and objective comparison of results from different sources, and therefore providing a way for solving the shortcomings of reported methods for Hg2+ detection. Additionally,this present method is simple, cost-effective and time-saving, ultrasensitive and highly selective, which is favorable for expanding its applications and subsequent mercury pollution control.
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Affiliation(s)
- Zhuo Zhou
- Hunan Provincial Key Laboratory of Micro & Nano Materials Interface Science, College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, PR China
| | - Yalin Ding
- Hunan Provincial Key Laboratory of Micro & Nano Materials Interface Science, College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, PR China
| | - Shihui Si
- Hunan Provincial Key Laboratory of Micro & Nano Materials Interface Science, College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, PR China
| | - Wuming Wu
- Academy of Hi-Tech Research,Hunan Institute of Traffic Engineering, Changsha 421001, PR China
| | - Chunyan Deng
- Hunan Provincial Key Laboratory of Micro & Nano Materials Interface Science, College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, PR China.
| | - Huiyun Wu
- Academy of Military Medical Sciences, Academy of Military Sciences, Beijing 100850, PR China.
| | - Juan Xiang
- Hunan Provincial Key Laboratory of Micro & Nano Materials Interface Science, College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, PR China.
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5
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Bidar N, Amini M, Oroojalian F, Baradaran B, Hosseini SS, Shahbazi MA, Hashemzaei M, Mokhtarzadeh A, Hamblin MR, de la Guardia M. Molecular beacon strategies for sensing purpose. Trends Analyt Chem 2021. [DOI: 10.1016/j.trac.2020.116143] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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6
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Ma N, Ren X, Wang H, Kuang X, Fan D, Wu D, Wei Q. Ultrasensitive Controlled Release Aptasensor Using Thymine–Hg2+–Thymine Mismatch as a Molecular Switch for Hg2+ Detection. Anal Chem 2020; 92:14069-14075. [DOI: 10.1021/acs.analchem.0c03110] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Ning Ma
- Collaborative Innovation Center for Green Chemical Manufacturing and Accurate Detection, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P. R. China
| | - Xiang Ren
- Collaborative Innovation Center for Green Chemical Manufacturing and Accurate Detection, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P. R. China
| | - Huan Wang
- Collaborative Innovation Center for Green Chemical Manufacturing and Accurate Detection, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P. R. China
| | - Xuan Kuang
- Collaborative Innovation Center for Green Chemical Manufacturing and Accurate Detection, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P. R. China
| | - Dawei Fan
- Collaborative Innovation Center for Green Chemical Manufacturing and Accurate Detection, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P. R. China
| | - Dan Wu
- Collaborative Innovation Center for Green Chemical Manufacturing and Accurate Detection, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P. R. China
| | - Qin Wei
- Collaborative Innovation Center for Green Chemical Manufacturing and Accurate Detection, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P. R. China
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7
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Feng Y, Zhou D, Gao L, He F. Electrochemical biosensor for rapid detection of bacteria based on facile synthesis of silver wire across electrodes. Biosens Bioelectron 2020; 168:112527. [PMID: 32905927 DOI: 10.1016/j.bios.2020.112527] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Revised: 08/13/2020] [Accepted: 08/19/2020] [Indexed: 12/24/2022]
Abstract
The early detection of bacteria is of critical importance in addressing serious public health problems. Here, an electrochemical biosensor for rapid detection of bacteria based on facile synthesis of silver wire across electrodes was constructed. High-variable region of 16S rRNA of bacteria was used as biomarker. Polymerase-free synthesis of silver wire was introduced into electrochemical signal transduction to improve the sensitivity of electrochemical detection. The construction biosensor of proposed method is as follows: Metastable hairpin probe H1 was modified on electrode surface, biomarker can open the stem-loop structure of H1 and activates HCR. The alternate opening of the stem-loop structure of H1 and H2-AuNPs finally results in the formation of long double-stranded DNA-RNA (HCR products) -AuNPs. The formed AuNPs modified HCR products was blown in one direction using N2 to across the electrode gap. Using this HCR products as template, the silver wire was formed between the electrodes by silver deposition, and resulted in sharp change in electrical parameters of electrode. As the proof-of-concept work, multichannel series piezoelectric quartz crystal (MSPQC) was utilized as detector. The detection of Staphylococcus aureus in the concentration range from 50 to 107 CFU/mL within 100 min was achieved. The detection limit was 50 CFU/mL. Escherichia coli, Salmonella enteritidis, Listeria innocua, Pseudomonas aeruginosa and Streptococcus pneumoniae did not interfere the detection results. This newly proposed electrochemical biosensor is simple, rapid and exhibit high signal-to-noise ratio, it has great potential for being applied in food safety monitoring and clinical diagnosis.
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Affiliation(s)
- Ye Feng
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China
| | - Dan Zhou
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China
| | - Lujia Gao
- Chemistry Department, Reed College, Portland, 97202, USA
| | - Fengjiao He
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China.
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8
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A Label-Free Fluorescent Sensor Based on the Formation of Poly(thymine)-Templated Copper Nanoparticles for the Sensitive and Selective Detection of MicroRNA from Cancer Cells. CHEMOSENSORS 2020. [DOI: 10.3390/chemosensors8030052] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
In this work, a simple and label-free fluorescence “off” to “on” platform was designed for the sensitive and selective detection of microRNA (miRNA) in cancer cells. This method utilized a padlock DNA-based rolling circle amplification (P-RCA) to synthesize fluorescent poly(thymine) (PolyT) which acted as a template for the synthesis of copper nanoparticles (CuNPs) within 10 minutes under mild conditions. While the repeated PolyT sequence was used as the template for CuNP synthesis, other non-PolyT parts (single strand-DNAs without the capacity to act as the template for CuNP formation) served as “smart glues” or rigid linkers to build complex nanostructures. Under the excitation wavelength of 340 nm, the synthesized CuNPs emitted strong red fluorescence effectively at 620 nm. To demonstrate the use of this method as a universal biosensor platform, lethal-7a (let-7a) miRNA was chosen as the standard target. This sensor could achieve highly sensitive and selective detection of miRNA in the presence of other homologous analogues for the combination of P-RCA with the fluorescent copper nanoparticle. Overall, this novel label-free method holds great potential in the sensitive detection of miRNA with high specificity in real samples.
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9
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He J, Hu X, Gao X, Meng C, Li Y, Li X, Fan L, Yu HZ. A versatile fluorometric in situ hybridization method for the quantitation of hairpin conformations in DNA self-assembled monolayers. Analyst 2020; 145:4522-4531. [PMID: 32418997 DOI: 10.1039/d0an00657b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
As the performance of hairpin DNA (hpDNA)-based biosensors is highly dependent on the yield of stem-loop (hairpin) conformations, we report herein a versatile fluorometric in situ hybridization protocol for examining hpDNA self-assembled monolayers (SAMs) on popularly used biochip substrates. Specifically, the ratio of fluorescence (FL) intensities of hpDNA SAMs (in an array format) before and after hybridization was adopted as the key parameter for performing such a determination. Upon confirming the existence of mixed and tunable DNA conformations in binary deposition solutions and efficient hybridization of the hairpin strands with the target DNA via gel electrophoresis assays, we tested the fluorometric protocol for determining the coverages of hpDNA in hpDNA/ssDNA SAMs prepared on gold; its accuracy was validated by Exonuclease I (Exo I)-assisted electrochemical quantitation. To further confirm its versatility, this FL protocol was adopted for quantifying hairpin conformations formed on glass and polycarbonate (PC) substrates. The molar ratios of surface-tethered hairpin conformations on the three different substrates were all found to be proportional to but less than those in the binary deposition solutions, and were dependent on the substrate morphology. The findings reported herein are beneficial for the construction of highly efficient DNA hairpin-based sensing surfaces, which essentially facilitates the creation of hpDNA-based biosensors with optimal detection performance.
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Affiliation(s)
- Jiale He
- College of Chemistry, Beijing Normal University, Beijing 100875, P. R. China.
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10
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Li Z, Jiang H, Liu S, Li Y, Yuchi Z, Gao Q. Ryanodine receptor-targeting small molecule fluorescent probes enables non-isotopic labeling and efficient drug screening for green insecticides. Anal Chim Acta 2020; 1108:108-117. [PMID: 32222232 DOI: 10.1016/j.aca.2020.02.047] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Revised: 02/12/2020] [Accepted: 02/24/2020] [Indexed: 11/19/2022]
Abstract
Ryanodine receptors (RyRs) are calcium release channels located on endoplasmic reticulum (ER) membrane, which play important role in excitation-contraction coupling in muscular response. Flubendiamide represents a novel chemical family of green insecticides which selectively activate invertebrate RyR by interacting with the receptor distinct from the ryanodine binding site and has almost no effect on mammalian ryanodine receptors. Traditional methods to screen RyR modulators involve either radio-labeled RyR substrates or calcium signal-based indirect approaches. However, there is lack of RyR-directed non-isotope molecular tools for RyR agonists/antagonists screening and bioimaging. Here we developed a series of fluorescent probes based on the pharmacophore of flubendiamide with the aims to elucidate the mechanism of diamide insecticides and screen novel RyR-targeting insecticides. These probes revealed the specific RyR staining and in vivo RyR targeting properties in diamondback moth RyR transfected Sf9 cells (Sf9-RyR) and RyR enriched insect tissues. The designed fluorescent probes could induce an effective calcium release from ER membrane of Sf9-RyR cells and also showed competitive RyR binding effect with flubendiamide in cell-based fluorometric assay. Having the non-isotope RyR recognition probes will not only accelerate the screening process of new green agrochemicals but also enables deciphering molecular mechanisms of the high selectivity and the drug resistance associated with the diamides.
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Affiliation(s)
- Zizhen Li
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, Institute of Molecular Plus, School of Pharmaceutical Science and Technology, Tianjin University, 92 Weijin Road, Nankai District, Tianjin, 300072, China; Central Institute of Pharmaceutical Research, CSPC Pharmaceutical Group, 226 Huanhe Road, Shijiazhuang, Hebei, 050035, China
| | - Heng Jiang
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, Institute of Molecular Plus, School of Pharmaceutical Science and Technology, Tianjin University, 92 Weijin Road, Nankai District, Tianjin, 300072, China
| | - Shengnan Liu
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, Institute of Molecular Plus, School of Pharmaceutical Science and Technology, Tianjin University, 92 Weijin Road, Nankai District, Tianjin, 300072, China
| | - Yuxin Li
- State Key Laboratory of Elemento-Organic Chemistry, Department of Chemistry, Nankai University, Weijin Road 94th, Tianjin, 300071, China.
| | - Zhiguang Yuchi
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, Institute of Molecular Plus, School of Pharmaceutical Science and Technology, Tianjin University, 92 Weijin Road, Nankai District, Tianjin, 300072, China.
| | - Qingzhi Gao
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, Institute of Molecular Plus, School of Pharmaceutical Science and Technology, Tianjin University, 92 Weijin Road, Nankai District, Tianjin, 300072, China; Department of Biology, Gudui BioPharma Technology Inc., 5 Lanyuan Road, Huayuan Industrial Park, Tianjin, 300384, China.
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11
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Nair RR, Raju M, Bhai S, Raval IH, Haldar S, Ganguly B, Chatterjee PB. Estimation of bisulfate in edible plant foods, dog urine, and drugs: picomolar level detection and bio-imaging in living organisms. Analyst 2020; 144:5724-5737. [PMID: 31486453 DOI: 10.1039/c9an01078e] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
In order to explore the properties of any species in solution, the actual, i.e. equilibrium concentration of the free species should be taken into account. Researchers have not paid attention to the deprotonation equilibrium between HSO4- and SO42- while probing bisulfate ion. In this study, we have addressed this concern and developed two zwitterions, CG (coumarin-integrated glycine) and CA (coumarin-integrated alanine), for the selective detection of HSO4- at a picomolar level (50 to 325 pM) with very high binding affinity (∼108 M-1) in pure water at physiological pH. The principle of HSO4- recognition was established via UV-vis and fluorescence techniques. DFT calculations suggested that the H-bonding interactions between the probes and HSO4- are the driving force for this unforeseen selectivity. The membrane penetration ability and nontoxicity of CG/CA enable them to function as staining agents in living brine shrimps and bacteria. The use of these probes for the estimation of HSO4- in various day-to-day edible foods and drugs along with urine samples is unprecedented. The significance and novelty of this study lies in the application and development of assays for estimating bisulfate in several real-world samples that are predominantly aqueous in nature, which are the first of their kind.
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Affiliation(s)
- Ratish R Nair
- Analytical and Environmental Science Division and Centralized Instrument Facility, CSIR-CSMCRI, G. B. Marg, Bhavnagar, India.
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12
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Lien CW, Yu PH, Chang HT, Hsu PH, Wu T, Lin YW, Huang CC, Lai JY. DNA engineered copper oxide-based nanocomposites with multiple enzyme-like activities for specific detection of mercury species in environmental and biological samples. Anal Chim Acta 2019; 1084:106-115. [DOI: 10.1016/j.aca.2019.08.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2018] [Revised: 08/02/2019] [Accepted: 08/04/2019] [Indexed: 10/26/2022]
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13
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Yang X, Qin X, Li Y, Yan M, Cui Y, Sun G. TBET-based ratiometric fluorescent probe for Hg2+ with large pseudo-Stokes shift and emission shift in aqueous media and intracellular colorimetric imaging in live Hela cells. Biosens Bioelectron 2018; 121:62-71. [DOI: 10.1016/j.bios.2018.09.004] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2018] [Revised: 08/31/2018] [Accepted: 09/01/2018] [Indexed: 11/29/2022]
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14
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Ratajczak K, Krazinski BE, Kowalczyk AE, Dworakowska B, Jakiela S, Stobiecka M. Hairpin-Hairpin Molecular Beacon Interactions for Detection of Survivin mRNA in Malignant SW480 Cells. ACS APPLIED MATERIALS & INTERFACES 2018; 10:17028-17039. [PMID: 29687994 DOI: 10.1021/acsami.8b02342] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Cancer biomarkers offer unique prospects for the development of cancer diagnostics and therapy. One of such biomarkers, protein survivin (Sur), exhibits strong antiapoptotic and proliferation-enhancing properties and is heavily expressed in multiple cancers. Thus, it can be utilized to provide new modalities for modulating the cell-growth rate, essential for effective cancer treatment. Herein, we have focused on the development of a new survivin-based cancer detection platform for colorectal cancer cells SW480 using a turn-on fluorescence oligonucleotide molecular beacon (MB) probe, encoded to recognize Sur messenger RNA (mRNA). Contrary to the expectations, we have found that both the complementary target oligonucleotide strands as well as the single- and double-mismatch targets, instead of exhibiting the anticipated simple random conformations, preferentially formed secondary structure motifs by folding into small-loop hairpin structures. Such a conformation may interfere with, or even undermine, the biorecognition process. To gain better understanding of the interactions involved, we have replaced the classical Tyagi-Kramer model of interactions between a straight target oligonucleotide strand and a hairpin MB with a new model to account for the hairpin-hairpin interactions as the biorecognition principle. A detailed mechanism of these interactions has been proposed. Furthermore, in experimental work, we have demonstrated an efficient transfection of malignant SW480 cells with SurMB probes containing a fluorophore Joe (SurMB-Joe) using liposomal nanocarriers. The green emission from SurMB-Joe in transfected cancer cells, due to the hybridization of the SurMB-Joe loop with Sur mRNA hairpin target, corroborates Sur overexpression. On the other hand, healthy human-colon epithelial cells CCD 841 CoN show only negligible expression of survivin mRNA. These experiments provide the proof-of-concept for distinguishing between the cancer and normal cells by the proposed hairpin-hairpin interaction method. The single nucleotide polymorphism sensitivity and a low detection limit of 26 nM (S/N = 3σ) for complementary targets have been achieved.
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Affiliation(s)
- Katarzyna Ratajczak
- Department of Biophysics , Warsaw University of Life Sciences (SGGW) , 159 Nowoursynowska Street , 02776 Warsaw , Poland
| | - Bartlomiej E Krazinski
- Department of Human Histology and Embryology , University of Warmia and Mazury , 30 Warszawska Street , 10082 Olsztyn , Poland
| | - Anna E Kowalczyk
- Department of Human Histology and Embryology , University of Warmia and Mazury , 30 Warszawska Street , 10082 Olsztyn , Poland
| | - Beata Dworakowska
- Department of Biophysics , Warsaw University of Life Sciences (SGGW) , 159 Nowoursynowska Street , 02776 Warsaw , Poland
| | - Slawomir Jakiela
- Department of Biophysics , Warsaw University of Life Sciences (SGGW) , 159 Nowoursynowska Street , 02776 Warsaw , Poland
| | - Magdalena Stobiecka
- Department of Biophysics , Warsaw University of Life Sciences (SGGW) , 159 Nowoursynowska Street , 02776 Warsaw , Poland
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15
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Hepel M, Stobiecka M. Supramolecular interactions of oxidative stress biomarker glutathione with fluorone black. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 192:146-152. [PMID: 29128748 DOI: 10.1016/j.saa.2017.11.017] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2017] [Revised: 10/24/2017] [Accepted: 11/06/2017] [Indexed: 06/07/2023]
Abstract
Oxidative stress biomarkers, including glutathione (GSH) and related compounds, are involved in a variety of interactions enabling redox potential maintenance in living cells and protection against radicals. Since the oxidative stress is promoting and, in many cases, inducing serious illnesses, monitoring of GSH levels can aid in diagnostics and disease prevention. Herein, we report on the discovery of the formation of a supramolecular ensemble of GSH with fluorone black (9-phenyl fluorone, FB) which is optically active and enables sensitive determination of GSH by resonance elastic light scattering (RELS). We have found that supramolecular interactions of GSH with FB can be probed with spectroscopic, RELS, and electrochemical methods. Our investigations show that RELS intensity for FB solutions increases with GSH concentration while fluorescence emission of FB is not affected, as quenching begins only above 0.8mM GSH. The UV-Vis difference spectra show a positive peak at 383nm and a negative peak at 458nm, indicating a higher-energy absorbing complex in comparison to the non-bonded FB host. Supramolecular interactions of FB with GSH have also been corroborated by electrochemical measurements involving two configurations of FB-GSH ensembles on electrodes: (i) an inverted orientation on Au-coated quartz crystal piezoelectrode (Au@SG-FB), with strong thiolate bonding to gold, and (ii) a non-inverted orientation on glassy carbon electrode (GCE@FB-GS), with weak π-π stacking attachment and efficient charge mediation through the ensemble. The formation of a supramolecular ensemble with hydrogen bonding has also been confirmed by quantum mechanical calculations. The discovery of supramolecular FB-GSH ensemble formation enables elucidating the mechanisms of strong RELS responses, changes in UV-Vis absorption spectra, and the electrochemical reactivity. Also, it provides new insights to the understanding of the efficient charge-transfer in redox potential homeostasis which is likely based on an intermediate formation of a similar type of supramolecular ensembles.
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Affiliation(s)
- Maria Hepel
- Department of Chemistry, State University of New York at Potsdam, Potsdam, NY 13676, USA.
| | - Magdalena Stobiecka
- Department of Chemistry, State University of New York at Potsdam, Potsdam, NY 13676, USA.
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16
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Ultrasensitive colorimetric and fluorometric detection of Hg(II) based on the use of gold nanoparticles and a catalytic hairpin assembly. Mikrochim Acta 2017. [DOI: 10.1007/s00604-017-2516-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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17
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Charge-transfer interactions of Cr species with DNA. J Inorg Biochem 2017; 175:148-153. [PMID: 28753493 DOI: 10.1016/j.jinorgbio.2017.07.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Revised: 06/28/2017] [Accepted: 07/17/2017] [Indexed: 11/20/2022]
Abstract
Interactions of Cr species with nucleic acids in living organisms depend strongly on Cr oxidation state and the environmental conditions. As the effects of these interactions range from benign to pre-mutagenic to carcinogenic, careful assessment of the hazard they pose to human health is necessary. We have investigated methods that would enable quantifying the DNA damage caused by Cr species under varying environmental conditions, including UV, O2, and redox potential, using simple instrumental techniques which could be in future combined into a field-deployable instrumentation. We have employed electrochemical quartz crystal nanogravimetry (EQCN), cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS) to evaluate the extent of DNA damage expressed in terms of guanine oxidation yield (η) and changes in specific characteristics provided by these techniques. The effects of the interactions of Cr species with DNA were analyzed using a model calf thymus DNA (ctDNA) film on a gold electrode (Au@ctDNA) in different media, including: (i) Cr(VI), (ii) Cr(VI) reduced at -0.2V, (iii) Cr(III)+UV radiation+O2, and Cr(III), obtaining the η values: 7.4±1.4, 1.5±0.4, 1.1±0.31%, and 0%, respectively, thus quantifying the hazard posed. The EIS measurements have enabled utilizing the decrease in charge-transfer resistance (Rct) for ferri/ferrocyanide redox probe at an Au@ctDNA electrode to assess the oxidative ctDNA damage by Cr(VI) species. In this case, circular dichroism indicates an extensive damage to the ctDNA hydrogen bonding. On the other hand, Cr(III) species have not induced any damage to ctDNA, although the EQCN measurements show an electrostatic binding to DNA.
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Wu Z, Shen H, Hu J, Fu Q, Yao C, Yu S, Xiao W, Tang Y. Aptamer-based fluorescence-quenching lateral flow strip for rapid detection of mercury (II) ion in water samples. Anal Bioanal Chem 2017; 409:5209-5216. [PMID: 28730311 DOI: 10.1007/s00216-017-0491-7] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2017] [Revised: 06/05/2017] [Accepted: 06/22/2017] [Indexed: 01/17/2023]
Abstract
Divalent mercury ion (Hg2+) is one of the most common and stable forms of mercury pollution. In this study, a skillfully designed lateral flow strip (LFS) was developed for sensitive detection of Hg2+ in river water samples. Aptamer, a specific oligonucleotide probe, was used to selectively identify and target Hg2+ instead of antibody in traditional immunechromatographic strips; and the fluorescence-quenching system was used to generate positive and low background florescence signals in the competitive-likely LFS. The linear detection range of the LFS for Hg2+ was 0.13 ng mL-1 to 4 ng mL-1 and the limit of detection (LOD) was 0.13 ng mL-1. This test provided results in 15 min and demonstrated high specificity. For detection of Hg2+ in river water, the results were consistent with inductively coupled plasma-mass spectrometry measurements. The aptamer-based fluorescence-quenching LFS was shown to provide a reliable, accurate method for rapid detection of mercury contamination. Graphical Abstract The principle of the aptamer-based fluorescence-quenching LFS.
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Affiliation(s)
- Ze Wu
- Department of Bioengineering, Guangdong Province Key Laboratory of Molecular Immunology and Antibody Engineering, Jinan University, Guangzhou, 510632, China
| | - Haicong Shen
- Department of Bioengineering, Guangdong Province Key Laboratory of Molecular Immunology and Antibody Engineering, Jinan University, Guangzhou, 510632, China
| | - Junhui Hu
- Department of Bioengineering, Guangdong Province Key Laboratory of Molecular Immunology and Antibody Engineering, Jinan University, Guangzhou, 510632, China
| | - Qiangqiang Fu
- Department of Bioengineering, Guangdong Province Key Laboratory of Molecular Immunology and Antibody Engineering, Jinan University, Guangzhou, 510632, China
| | - Cuize Yao
- Department of Bioengineering, Guangdong Province Key Laboratory of Molecular Immunology and Antibody Engineering, Jinan University, Guangzhou, 510632, China
| | - Shiting Yu
- Department of Bioengineering, Guangdong Province Key Laboratory of Molecular Immunology and Antibody Engineering, Jinan University, Guangzhou, 510632, China
| | - Wei Xiao
- Department of Bioengineering, Guangdong Province Key Laboratory of Molecular Immunology and Antibody Engineering, Jinan University, Guangzhou, 510632, China
| | - Yong Tang
- Department of Bioengineering, Guangdong Province Key Laboratory of Molecular Immunology and Antibody Engineering, Jinan University, Guangzhou, 510632, China.
- Institute of Biotranslational Medicine, Jinan University, Guangzhou, 510632, China.
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19
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Ratajczak K, Stobiecka M. Ternary Interactions and Energy Transfer between Fluorescein Isothiocyanate, Adenosine Triphosphate, and Graphene Oxide Nanocarriers. J Phys Chem B 2017. [PMID: 28650635 DOI: 10.1021/acs.jpcb.7b04295] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The interactions of fluorescent probes and biomolecules with nanocarriers are of key importance to the emerging targeted drug delivery systems. Graphene oxide nanosheets (GONs) as the nanocarriers offer biocompatibility and robust drug binding capacity. The interactions of GONs with fluorophores lead to strong fluorescence quenching, which may interfere with fluorescence bioimaging and biodetection. Herein, we report on the interactions and energy transfers in a model ternary system: GONs-FITC-ATP, where FITC is a model fluorophore (fluorescein isothiocyanate) and ATP is a common biomolecule (adenosine-5'-triphosphate). We have found that FITC fluorescence is considerably quenched by ATP (the quenching constant KSV = 113 ± 22 M-1). The temperature coefficient of KSV is positive (αT = 4.15 M-1deg-1). The detailed analysis of a model for internal self-quenching of FITC indicates that the temperature dependence of the net quenching efficiency η for the FITC-ATP pair is dominated by FITC internal self-quenching modes with their contribution estimated at 79%. The quenching of FITC by GONs is much stronger (KSV = 598 ± 29 M-1) than that of FITC-ATP and is associated with the formation of supramolecular assemblies bound with hydrogen bonding and π-π stacking interactions. For the analysis of the complex behavior of the ternary system GONs-FITC-ATP, a model of chemisorption of ATP on GONs, with partial blocking of FITC quenching, has been developed. Our results indicate that ATP acts as a moderator for FITC quenching by GONs. The interactions between ATP, FITC, and GONs have been corroborated using molecular dynamics and quantum mechanical calculations.
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Affiliation(s)
- Katarzyna Ratajczak
- Department of Biophysics, Warsaw University of Life Sciences (SGGW) , 159 Nowoursynowska Street, 02776 Warsaw, Poland
| | - Magdalena Stobiecka
- Department of Biophysics, Warsaw University of Life Sciences (SGGW) , 159 Nowoursynowska Street, 02776 Warsaw, Poland
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20
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Zhang Y, Zhang C, Ma R, Du X, Dong W, Chen Y, Chen Q. An ultra-sensitive Au nanoparticles functionalized DNA biosensor for electrochemical sensing of mercury ions. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 75:175-181. [DOI: 10.1016/j.msec.2017.02.058] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2016] [Revised: 10/31/2016] [Accepted: 02/14/2017] [Indexed: 11/26/2022]
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21
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Lashgari N, Badiei A, Mohammadi Ziarani G, Faridbod F. Isatin functionalized nanoporous SBA-15 as a selective fluorescent probe for the detection of Hg(II) in water. Anal Bioanal Chem 2017; 409:3175-3185. [PMID: 28271223 DOI: 10.1007/s00216-017-0258-1] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2016] [Revised: 01/15/2017] [Accepted: 02/13/2017] [Indexed: 01/21/2023]
Abstract
A highly ordered mesoporous silica material functionalized with isatin (SBA-Pr-IS) was designed and synthesized. Characterization techniques including XRD, TGA, BET, SEM, and FT-IR were employed to characterize the pore structure, textural properties, microscopic morphology, and molecular composition of grafted organic moieties of SBA-Pr-IS. The successful attachment of the organic moiety (0.34 mmol g-1) without the SBA-15 structure collapsing after the modification steps was confirmed. Fluorescence characterization of SBA-Pr-IS was examined upon addition of a wide variety of cations in aqueous medium and it showed high sensitivity toward Hg2+ ions. During testing in an ion competition experiment, it was observed that the fluorescence changes of the probe were remarkably specific for Hg2+ ions. Furthermore, a good linearity between the fluorescence intensity of this material and the concentration of Hg2+ ions was constructed with a suitable detection limit of 3.7 × 10-6 M. Finally, the applicability of the proposed method was successfully evaluated for the determination of Hg2+ ions in real samples. Therefore, SBA-Pr-IS can be used as an efficient fluorescence probe for Hg2+ ions. Graphical Abstract A novel organic-inorganic hybrid material was designed and synthesized by functionalization of SBA-15 mesoporous silica material with isatin. The evaluation of the sensing ability of SBA-Pr-IS using fluorescence spectroscopy revealed that the SBA-Pr-IS was a selective fluorescent probe for Hg2+ ion in water in the presence of a wide range of metal cations.
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Affiliation(s)
- Negar Lashgari
- School of Chemistry, College of Science, University of Tehran, 16th Azar St., Enghelab Sq., 1417466191, Tehran, Iran
| | - Alireza Badiei
- School of Chemistry, College of Science, University of Tehran, 16th Azar St., Enghelab Sq., 1417466191, Tehran, Iran. .,Nanobiomedicine Center of Excellence, Nanoscience and Nanotechnology Research Center, University of Tehran, 16th Azar St., Enghelab Sq., 1417466191, Tehran, Iran.
| | | | - Farnoush Faridbod
- Center of Excellence in Electrochemistry, School of Chemistry, College of Science, University of Tehran, 16th Azar St., Enghelab Sq., 1417466191, Tehran, Iran
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22
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“Off-On”switching electrochemiluminescence biosensor for mercury(II) detection based on molecular recognition technology. Anal Biochem 2017; 518:46-52. [DOI: 10.1016/j.ab.2016.09.018] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Revised: 09/19/2016] [Accepted: 09/20/2016] [Indexed: 01/26/2023]
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23
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Xie M, Zhang K, Zhu F, Wu H, Zou P. Strategy for the detection of mercury ions by using exonuclease III-aided target recycling. RSC Adv 2017. [DOI: 10.1039/c7ra09288a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A new method for the detection of Hg2+ by using an Exo III and G-quadruplex-based strategy was reported here.
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Affiliation(s)
- Minhao Xie
- Key Laboratory of Nuclear Medicine
- Ministry of Health
- Jiangsu Key Laboratory of Molecular Nuclear Medicine
- Jiangsu Institute of Nuclear Medicine
- Wuxi
| | - Kai Zhang
- Key Laboratory of Nuclear Medicine
- Ministry of Health
- Jiangsu Key Laboratory of Molecular Nuclear Medicine
- Jiangsu Institute of Nuclear Medicine
- Wuxi
| | - Feifan Zhu
- Key Laboratory of Nuclear Medicine
- Ministry of Health
- Jiangsu Key Laboratory of Molecular Nuclear Medicine
- Jiangsu Institute of Nuclear Medicine
- Wuxi
| | - Hao Wu
- Key Laboratory of Nuclear Medicine
- Ministry of Health
- Jiangsu Key Laboratory of Molecular Nuclear Medicine
- Jiangsu Institute of Nuclear Medicine
- Wuxi
| | - Pei Zou
- Key Laboratory of Nuclear Medicine
- Ministry of Health
- Jiangsu Key Laboratory of Molecular Nuclear Medicine
- Jiangsu Institute of Nuclear Medicine
- Wuxi
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24
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Yang Q, Liu J, Li B, Hu X, Liu S, Chen G. In-situ formation of ion-association nanoparticles induced enhancements of resonance Rayleigh scattering intensities for quantitative analysis of trace Hg(2+) ions in environmental samples. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2016; 167:19-25. [PMID: 27235829 DOI: 10.1016/j.saa.2016.05.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2015] [Revised: 05/04/2016] [Accepted: 05/10/2016] [Indexed: 06/05/2023]
Abstract
In this paper, Hg(2+) ions are demonstrated to form anionic [HgI4](2-) complexes after interacting with massive amount of I(-) ions. Subsequently, the addition of tetradecyl pyridyl bromide (TPB) can make [HgI4](2-) anionic complexes react with univalent tetradecyl pyridyl cationic ions (TP(+)), forming dispersed ion-association complexes (TP)2(HgI4). Due to the extrusion action of water and Van der Waals force, the hydrophobic ion-association complexes aggregate together, forming dispersed nanoparticles with an average size of about 8.5nm. Meanwhile, resonance Rayleigh scattering (RRS) intensity is apparently enhanced due to the formation of (TP)2(HgI4) ion-association nanoparticles, contributing to a novel technique for Hg(2+) detection. The wavelength of 365nm is chosen as a detection wavelength and several conditions affecting the RRS responses of Hg(2+) are optimized. Under the optimum condition, the developed method is used for the determination of Hg(2+) in aqueous solution and the detection limit is estimated to be 0.8ngmL(-1). Finally, the practical application of the developed method can be confirmed through the detections of Hg(2+) in waste and river water samples with satisfactory results.
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Affiliation(s)
- Qingling Yang
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry, Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China; Environmental Monitoring Center in Chongqing City, Chongqing 400020, China
| | - Jian Liu
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry, Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Banglin Li
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry, Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Xiaoli Hu
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry, Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Shaopu Liu
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry, Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China.
| | - Gangcai Chen
- Environmental Monitoring Center in Chongqing City, Chongqing 400020, China
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25
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Yoo S, Kim S, Eom MS, Kang S, Lim SH, Han MS. Development of a highly sensitive colorimetric thymidine triphosphate chemosensor using gold nanoparticles and the p-xylyl-bis(Hg2+-cyclen) complex: improved selectivity by metal ion tuning. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.08.075] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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26
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Zhao L, Zhao L, Miao Y, Zhang C. Selective electrochemical determination of glutathione from the leakage of intracellular GSH contents in HeLa cells following doxorubicin-induced cell apoptosis. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2016.04.117] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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27
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Stobiecka M, Chalupa A. DNA Strand Replacement Mechanism in Molecular Beacons Encoded for the Detection of Cancer Biomarkers. J Phys Chem B 2016; 120:4782-90. [PMID: 27187043 DOI: 10.1021/acs.jpcb.6b03475] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Signaling properties of a fluorescent hairpin oligonucleotide molecular beacon (MB) encoded to recognize protein survivin (Sur) mRNA have been investigated. The process of complementary target binding to SurMB with 20-mer loop sequence is spontaneous, as expected, and characterized by a high affinity constant (K = 2.51 × 10(16) M(-1)). However, the slow kinetics at room temperature makes it highly irreversible. To understand the intricacies of target binding to MB, a detailed kinetic study has been performed to determine the rate constants and activation energy Ea for the reaction at physiological temperature (37 °C). Special attention has been paid to assess the value of Ea in view of reports of negative activation enthalpy for some nucleic acid reactions that would make the target binding even slower at increasing temperatures in a non-Arrhenius process. The target-binding rate constant determined is k = 3.99 × 10(3) M(-1) s(-1) at 37 °C with Ea = 28.7 ± 2.3 kcal/mol (120.2 ± 9.6 kJ/mol) for the temperature range of 23 to 55 °C. The positive high value of Ea is consistent with a kinetically controlled classical Arrhenius process. We hypothesize that the likely contribution to the activation energy barrier comes from the SurMB stem melting (tm = 53.7 ± 0.2 °C), which is a necessary step in the completion of target strand hybridization with the SurMB loop. A low limit of detection (LOD = 2 nM) for target tDNA has been achieved. Small effects of conformational polymorphs of SurMB have been observed on melting curves. Although these polymorphs could potentially cause a negative Ea, their effect on kinetic transients for target binding is negligible. No toehold preceding steps in the mechanism of target binding were identified.
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Affiliation(s)
- Magdalena Stobiecka
- Department of Biophysics, Warsaw University of Life Sciences (SGGW) , 02776 Warsaw, Poland
| | - Agata Chalupa
- Institute of Nanoparticle Nanocarriers , 11010 Barczewo, Poland
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28
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Zhao Y, Liu H, Chen F, Bai M, Zhao Y. Fidelity quantification of mercury( ii) ion via circumventing biothiols-induced sequestration in enzymatic amplification system. RSC Adv 2016. [DOI: 10.1039/c6ra16960k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A fidelity quantification of mercury(ii) ion based on nucleic acids amplification is developedviacircumventing biothiols-induced sequestration.
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Affiliation(s)
- Yue Zhao
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education
- School of Life Science and Technology
- Xi'an Jiaotong University
- Xi'an
- P. R. China
| | - Huaqing Liu
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education
- School of Life Science and Technology
- Xi'an Jiaotong University
- Xi'an
- P. R. China
| | - Feng Chen
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education
- School of Life Science and Technology
- Xi'an Jiaotong University
- Xi'an
- P. R. China
| | - Min Bai
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education
- School of Life Science and Technology
- Xi'an Jiaotong University
- Xi'an
- P. R. China
| | - Yongxi Zhao
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education
- School of Life Science and Technology
- Xi'an Jiaotong University
- Xi'an
- P. R. China
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29
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Ma L, Liu H, Wu G, Sun N, Meng L, Li Y, Liu Z, Diao A. A dual-channel detection of mercuric ions using a label free G-quadruplex-based DNAzyme molecule. Analyst 2016; 141:3997-4000. [DOI: 10.1039/c6an00795c] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We have constructed a ‘turn-off’ and label free bio-sensor using a DNAzyme molecule.
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Affiliation(s)
- Long Ma
- Biomolecular Sciences Research Complex
- EaStCHEM School of Chemistry
- University of St Andrews
- Fife KY16 9ST
- UK
| | - Haiyan Liu
- Key Laboratory of Industrial Fermentation Microbiology
- Ministry of Education
- School of Biotechnology
- Tianjin University of Science & Technology
- Tianjin 300457
| | - Guanrong Wu
- Key Laboratory of Industrial Fermentation Microbiology
- Ministry of Education
- School of Biotechnology
- Tianjin University of Science & Technology
- Tianjin 300457
| | - Nana Sun
- Key Laboratory of Industrial Fermentation Microbiology
- Ministry of Education
- School of Biotechnology
- Tianjin University of Science & Technology
- Tianjin 300457
| | - Lingpei Meng
- Key Laboratory of Industrial Fermentation Microbiology
- Ministry of Education
- School of Biotechnology
- Tianjin University of Science & Technology
- Tianjin 300457
| | - Yuyin Li
- Key Laboratory of Industrial Fermentation Microbiology
- Ministry of Education
- School of Biotechnology
- Tianjin University of Science & Technology
- Tianjin 300457
| | - Zhenxing Liu
- Key Laboratory of Industrial Fermentation Microbiology
- Ministry of Education
- School of Biotechnology
- Tianjin University of Science & Technology
- Tianjin 300457
| | - Aipo Diao
- Key Laboratory of Industrial Fermentation Microbiology
- Ministry of Education
- School of Biotechnology
- Tianjin University of Science & Technology
- Tianjin 300457
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30
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Park KS, Lee CY, Park HG. Metal ion triggers for reversible switching of DNA polymerase. Chem Commun (Camb) 2016; 52:4868-71. [DOI: 10.1039/c6cc00454g] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
A new strategy to modulate DNA polymerase activity in a reversible and switchable manner was devised by using the novel interactions between DNA bases and metal ions.
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Affiliation(s)
- Ki Soo Park
- Department of Chemical and Biomolecular Engineering (BK 21+ program)
- KAIST
- Daejeon 305-338
- Republic of Korea
| | - Chang Yeol Lee
- Department of Chemical and Biomolecular Engineering (BK 21+ program)
- KAIST
- Daejeon 305-338
- Republic of Korea
| | - Hyun Gyu Park
- Department of Chemical and Biomolecular Engineering (BK 21+ program)
- KAIST
- Daejeon 305-338
- Republic of Korea
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31
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Ma L, Wu G, Li Y, Qin P, Meng L, Liu H, Li Y, Diao A. A reversible metal ion fueled DNA three-way junction molecular device for "turn-on and -off" fluorescence detection of mercury ions (II) and biothiols respectively with high selectivity and sensitivity. NANOSCALE 2015; 7:18044-18048. [PMID: 26487480 DOI: 10.1039/c5nr04688b] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We constructed a reversible molecular device in the nanoscale based on a DNA three-way junction (3WJ) fueled by Hg(2+) binding and sequestration. It is highly responsive to external stimuli, which brings about optically detectable global structural changes. Such a DNA device can serve as a novel "turn-on and -off" fluorescent sensor for Hg(2+) and biothiol detection with high selectivity and sensitivity.
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Affiliation(s)
- Long Ma
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, School of Biotechnology, Tianjin University of Science & Technology, Tianjin 300457, China. and Tianjin Key Laboratory of Industry Microbiology, School of Biotechnology, Tianjin University of Science & Technology, Tianjin 300457, China
| | - Guanrong Wu
- Tianjin Key Laboratory of Industry Microbiology, School of Biotechnology, Tianjin University of Science & Technology, Tianjin 300457, China and Biomolecular Sciences Research Complex, EaStCHEM School of Chemistry, University of St Andrews, Fife KY16 9ST, UK.
| | - Yufeng Li
- Tianjin Key Laboratory of Industry Microbiology, School of Biotechnology, Tianjin University of Science & Technology, Tianjin 300457, China and Biomolecular Sciences Research Complex, EaStCHEM School of Chemistry, University of St Andrews, Fife KY16 9ST, UK.
| | - Ping Qin
- Tianjin Key Laboratory of Industry Microbiology, School of Biotechnology, Tianjin University of Science & Technology, Tianjin 300457, China and Biomolecular Sciences Research Complex, EaStCHEM School of Chemistry, University of St Andrews, Fife KY16 9ST, UK.
| | - Lingpei Meng
- Tianjin Key Laboratory of Industry Microbiology, School of Biotechnology, Tianjin University of Science & Technology, Tianjin 300457, China and Biomolecular Sciences Research Complex, EaStCHEM School of Chemistry, University of St Andrews, Fife KY16 9ST, UK.
| | - Haiyan Liu
- Tianjin Key Laboratory of Industry Microbiology, School of Biotechnology, Tianjin University of Science & Technology, Tianjin 300457, China and Biomolecular Sciences Research Complex, EaStCHEM School of Chemistry, University of St Andrews, Fife KY16 9ST, UK.
| | - Yuyin Li
- Tianjin Key Laboratory of Industry Microbiology, School of Biotechnology, Tianjin University of Science & Technology, Tianjin 300457, China and Biomolecular Sciences Research Complex, EaStCHEM School of Chemistry, University of St Andrews, Fife KY16 9ST, UK.
| | - Aipo Diao
- Tianjin Key Laboratory of Industry Microbiology, School of Biotechnology, Tianjin University of Science & Technology, Tianjin 300457, China and Biomolecular Sciences Research Complex, EaStCHEM School of Chemistry, University of St Andrews, Fife KY16 9ST, UK.
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32
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Li RD, Wang Q, Yin BC, Ye BC. Enzyme-free detection of sequence-specific microRNAs based on nanoparticle-assisted signal amplification strategy. Biosens Bioelectron 2015; 77:995-1000. [PMID: 26547010 DOI: 10.1016/j.bios.2015.10.082] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2015] [Revised: 10/18/2015] [Accepted: 10/28/2015] [Indexed: 11/26/2022]
Abstract
Developing direct and convenient methods for microRNAs (miRNAs) analysis is of great significance in understanding biological functions of miRNAs, and early diagnosis of cancers. We have developed a rapid, enzyme-free method for miRNA detection based on nanoparticle-assisted signal amplification coupling fluorescent metal nanoclusters as signal output. The proposed method involves two processes: target miRNA-mediated nanoparticle capture, which consists of magnetic microparticle (MMP) probe and CuO nanoparticle (NP) probe, and nanoparticle-mediated amplification for signal generation, which consists of fluorescent DNA-Cu/Ag nanocluster (NC) and 3-mercaptopropionic acid (MPA). In the presence of target miRNA, MMP probe and NP probe sandwich-capture the target miRNA via their respective complementary sequence. The resultant sandwich complex (MMP probe-miRNA-CuO NP probe) is separated using a magnetic field and further dissolved by acidolysis to turn CuO NP into a great amount of copper (II) ions (Cu(2+)). Cu(2+) could disrupt the interactions between thiol moiety of MPA and the fluorescent Cu/Ag NCs by preferentially reacting with MPA to form a disulfide compound as intermediate. By this way, the fluorescence emission of the DNA-Cu/Ag NCs in the presence of MPA increases upon the increasing concentration of Cu(2+), which is directly proportional to the amount of target miRNA. The proposed method allows quantitative detection of a liver-specific miR-221-5p in the range of 5 pM to 1000 pM with a detection limit of ~0.73 pM, and shows a good ability to discriminate single-base difference. Moreover, the detection assay can be applied to detect miRNA in cancerous cell lysates in excellent agreement with that from a commercial miRNA detection kit.
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Affiliation(s)
- Ru-Dong Li
- Lab of Biosystem and Microanalysis, State Key Laboratory of Bioreactor Engineering, East China University of Science & Technology, Shanghai 200237, China
| | - Qian Wang
- Lab of Biosystem and Microanalysis, State Key Laboratory of Bioreactor Engineering, East China University of Science & Technology, Shanghai 200237, China
| | - Bin-Cheng Yin
- Lab of Biosystem and Microanalysis, State Key Laboratory of Bioreactor Engineering, East China University of Science & Technology, Shanghai 200237, China.
| | - Bang-Ce Ye
- Lab of Biosystem and Microanalysis, State Key Laboratory of Bioreactor Engineering, East China University of Science & Technology, Shanghai 200237, China.
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Dong YP, Gao TT, Zhou Y, Jiang LP, Zhu JJ. Anodic Electrogenerated Chemiluminescence of Ru(bpy)3(2+) with CdSe Quantum Dots as Coreactant and Its Application in Quantitative Detection of DNA. Sci Rep 2015; 5:15392. [PMID: 26472243 PMCID: PMC4607998 DOI: 10.1038/srep15392] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2015] [Accepted: 09/14/2015] [Indexed: 12/27/2022] Open
Abstract
In the present paper, we report that CdSe quantum dots (QDs) can act as the coreactant of Ru(bpy)32+ electrogenerated chemiluminescence (ECL) in neutral condition. Strong anodic ECL signal was observed at ~1.10 V at CdSe QDs modified glassy carbon electrode (CdSe/GCE), which might be mainly attributed to the apparent electrocatalytic effect of QDs on the oxidation of Ru(bpy)32+. Ru(bpy)32+ can be intercalated into the loop of hairpin DNA through the electrostatic interaction to fabricate a probe. When the probe was bound to the CdSe QDs modified on the GCE, the intense ECL signal was obtained. The more Ru(bpy)32+ can be intercalated when DNA loop has larger diameter and the stronger ECL signal can be observed. The loop of hairpin DNA can be opened in the presence of target DNA to release the immobilized Ru(bpy)32+, which can result in the decrease of ECL signal. The decreased ECL signal varied linearly with the concentration of target DNA, which showed the ECL biosensor can be used in the sensitive detection of DNA. The proposed ECL biosensor showed an excellent performance with high specificity, wide linear range and low detection limit.
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Affiliation(s)
- Yong-Ping Dong
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Chemistry for Life Sciences, Nanjing University, Nanjing 210093, China.,School of Chemistry and Chemical Engineering, Anhui University of Technology, Maanshan 243002, China
| | - Ting-Ting Gao
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Chemistry for Life Sciences, Nanjing University, Nanjing 210093, China.,School of Chemistry and Chemical Engineering, Anhui University of Technology, Maanshan 243002, China
| | - Ying Zhou
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Chemistry for Life Sciences, Nanjing University, Nanjing 210093, China.,School of Chemistry and Chemical Engineering, Anhui University of Technology, Maanshan 243002, China
| | - Li-Ping Jiang
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Chemistry for Life Sciences, Nanjing University, Nanjing 210093, China
| | - Jun-Jie Zhu
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Chemistry for Life Sciences, Nanjing University, Nanjing 210093, China
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34
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Stobiecka M, Chalupa A. Modulation of Plasmon-Enhanced Resonance Energy Transfer to Gold Nanoparticles by Protein Survivin Channeled-Shell Gating. J Phys Chem B 2015; 119:13227-35. [DOI: 10.1021/acs.jpcb.5b07778] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Magdalena Stobiecka
- Department
of Biophysics, Warsaw University of Life Sciences (SGGW), 02776 Warsaw, Poland
| | - Agata Chalupa
- Institute of Nanoparticle Nanocarriers, 11010 Barczewo, Poland
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35
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Dudina NA, Antina EV, Sozonov DI, V’yugin AI. Effect of alkyl substitution in 3,3′-Bis(dipyrrin) on chemosensor activity of fluorescent detection of Zn2+ cations. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2015. [DOI: 10.1134/s107042801508014x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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36
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Gao W, Zhang L, Liang RP, Qiu JD. Metal-Ion-Triggered Exonuclease III Activity for the Construction of DNA Colorimetric Logic Gates. Chemistry 2015; 21:15272-9. [DOI: 10.1002/chem.201502122] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2015] [Indexed: 01/05/2023]
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37
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Electrochemical detection of Bisphenol A with high sensitivity and selectivity using recombinant protein-immobilized graphene electrodes. Biosens Bioelectron 2015; 71:214-221. [DOI: 10.1016/j.bios.2015.04.042] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2015] [Revised: 04/06/2015] [Accepted: 04/13/2015] [Indexed: 01/03/2023]
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38
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Zhu Y, Cai Y, Zhu Y, Zheng L, Ding J, Quan Y, Wang L, Qi B. Highly sensitive colorimetric sensor for Hg2+ detection based on cationic polymer/DNA interaction. Biosens Bioelectron 2015; 69:174-8. [DOI: 10.1016/j.bios.2015.02.018] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2014] [Revised: 02/09/2015] [Accepted: 02/10/2015] [Indexed: 01/13/2023]
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39
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Electrochemiluminescent DNA sensor based on controlled Zn-mediated grafting of diazonium precursors. Anal Bioanal Chem 2015; 407:5579-86. [DOI: 10.1007/s00216-015-8765-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2015] [Revised: 05/03/2015] [Accepted: 05/05/2015] [Indexed: 11/27/2022]
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40
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Abdelhamid HN, Wu HF. Facile synthesis of nano silver ferrite (AgFeO2) modified with chitosan applied for biothiol separation. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 45:438-45. [DOI: 10.1016/j.msec.2014.08.071] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2014] [Revised: 07/29/2014] [Accepted: 08/31/2014] [Indexed: 10/24/2022]
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41
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Nieh CC, Tseng WL. Thymine-based molecular beacon for sensing adenosine based on the inhibition of S-adenosylhomocysteine hydrolase activity. Biosens Bioelectron 2014; 61:404-9. [DOI: 10.1016/j.bios.2014.05.031] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2014] [Revised: 05/12/2014] [Accepted: 05/13/2014] [Indexed: 01/23/2023]
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42
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Tortolini C, Bollella P, Antonelli ML, Antiochia R, Mazzei F, Favero G. DNA-based biosensors for Hg(2+) determination by polythymine-methylene blue modified electrodes. Biosens Bioelectron 2014; 67:524-31. [PMID: 25263314 DOI: 10.1016/j.bios.2014.09.031] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2014] [Revised: 09/12/2014] [Accepted: 09/15/2014] [Indexed: 11/26/2022]
Abstract
In this work we have developed a new electrochemical DNA-based biosensor for the selective determination of the Hg(2+) ion by the use of different electrodes modified with polythymine, bearing methylene blue, as redox probe, in 3' position. The determination of Hg(2+) can be employed with an excellent degree of selectivity by the use of DNA biosensors through the formation of the complex Thymine-Hg-Thymine (T-Hg-T): in fact, Hg(2+) tends to bind two thymines, generating a T-Hg-T complex with a formation constant higher than that one of the coupling Adenine-Thymine, which can be employed for a selective, fast and cost-effective Hg(2+) detection. The presence of the Hg(2+) in solution leads to the formation of T-Hg-T complex thus causing the "hairpin-like" folding of oligonucleotide, leading to an improved electronic exchange of methylene blue with the electrode surface due to the reduced distance and thus to an increase of the faradic current which is detected by means of square wave voltammetry (SWV). To test the feasibility of this kind of biosensor to be applied to the analysis of Hg(2+) we have developed several biosensors configuration by modifying the electrochemical sensor transducer: (a) Au electrode; (b) Au screen-printed electrode (SPE). The proposed system, allows the determination of Hg(2+) in the range 0.2-100 nM (0.05-20 ppb), with a sensitivity 0.327 µA/nM, LOD 0.1 nM (0.02 ppb), LOQ 0.2 nM (0.05 ppb) and RSD ≤4.3% when Au electrode is used as electrochemical transducer; on the other hand, in the case of Au SPE the linear range is 0.2-50 nM (0.05-10 ppb), with a sensitivity 0.285 µA/nM, while LOD and LOQ are the same as previously and RSD is ≤3.8%. This enabled the detection of mercury in real samples (waters and fishes) with good accuracy (recoveries 92-101% on waters and 92-107% on fishes, respectively) and reproducibility (RSD ≤9.6% for measurements on waters and ≤8.8% on fishes, respectively).
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Affiliation(s)
- Cristina Tortolini
- Department of Chemistry and Drug Technologies, Sapienza University of Rome, Italy; Department of Chemistry, Sapienza University of Rome, Italy
| | - Paolo Bollella
- Department of Chemistry, Sapienza University of Rome, Italy
| | | | - Riccarda Antiochia
- Department of Chemistry and Drug Technologies, Sapienza University of Rome, Italy
| | - Franco Mazzei
- Department of Chemistry and Drug Technologies, Sapienza University of Rome, Italy
| | - Gabriele Favero
- Department of Chemistry and Drug Technologies, Sapienza University of Rome, Italy
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Kosman J, Wu YT, Gluszynska A, Juskowiak B. N-Methyl-4-hydrazino-7-nitrobenzofurazan: a fluorogenic substrate for peroxidase-like DNAzyme, and its potential application. Anal Bioanal Chem 2014; 406:7049-57. [PMID: 25213215 PMCID: PMC4206775 DOI: 10.1007/s00216-014-8119-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2014] [Revised: 08/15/2014] [Accepted: 08/18/2014] [Indexed: 01/31/2023]
Abstract
Characterization and optimization studies of N-methyl-4-hydrazino-7-nitrobenzofurazan (MNBDH) as a new fluorogenic substrate in the peroxidation reaction catalyzed by DNAzyme are reported. The effects of pH, H2O2 concentration, metal-cation type, and the concentration and type of surfactant on the fluorescence intensity were investigated. The optimized reaction was subsequently used for the development of an assay for DNA detection based on a molecular-beacon probe. The use of a fluorogenic substrate enabled the detection of a single-stranded DNA target with a 1 nmol L(-1) detection limit.
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Affiliation(s)
- Joanna Kosman
- Faculty of Chemistry, Adam Mickiewicz University in Poznan, Umultowska 89b, 61-614, Poznan, Poland,
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44
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Cao C, Zhang J, Li S, Xiong Q. Intelligent and ultrasensitive analysis of mercury trace contaminants via plasmonic metamaterial-based surface-enhanced Raman spectroscopy. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2014; 10:3252-6. [PMID: 24729476 DOI: 10.1002/smll.201400165] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2014] [Indexed: 05/18/2023]
Abstract
Label-free molecular logic gates (AND, INHIBIT, and OR) are constructed based on specific conformation modulation of a guanine- and thymine-rich DNA, while the optical readout is enabled by the tunable metamaterials which serve as a substrate for surface enhanced Raman spectroscopy. The DNA logic is simple to operate, highly reproducible, and can be stimulated by ultra-low concentration of the external inputs, enabling an extremely sensitive detection of mercury ions down to 2 × 10(-4) ppb.
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Affiliation(s)
- Cuong Cao
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, 637371
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45
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High sensitive mesoporous TiO2-coated love wave device for heavy metal detection. Biosens Bioelectron 2014; 57:162-70. [DOI: 10.1016/j.bios.2013.12.024] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2013] [Revised: 11/29/2013] [Accepted: 12/02/2013] [Indexed: 11/21/2022]
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46
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Shen LM, Chen Q, Sun ZY, Chen XW, Wang JH. Assay of Biothiols by Regulating the Growth of Silver Nanoparticles with C-Dots as Reducing Agent. Anal Chem 2014; 86:5002-8. [DOI: 10.1021/ac500601k] [Citation(s) in RCA: 86] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Li-Ming Shen
- Research
Center for Analytical Sciences, College of Sciences, Northeastern University, Box 332, Shenyang, Liaoning 110819, China
| | - Qing Chen
- Research
Center for Analytical Sciences, College of Sciences, Northeastern University, Box 332, Shenyang, Liaoning 110819, China
| | - Zheng-Yue Sun
- Research
Center for Analytical Sciences, College of Sciences, Northeastern University, Box 332, Shenyang, Liaoning 110819, China
| | - Xu-Wei Chen
- Research
Center for Analytical Sciences, College of Sciences, Northeastern University, Box 332, Shenyang, Liaoning 110819, China
| | - Jian-Hua Wang
- Research
Center for Analytical Sciences, College of Sciences, Northeastern University, Box 332, Shenyang, Liaoning 110819, China
- Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300071, China
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47
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Stobiecka M. Novel plasmonic field-enhanced nanoassay for trace detection of proteins. Biosens Bioelectron 2014; 55:379-85. [DOI: 10.1016/j.bios.2013.11.073] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2013] [Revised: 11/23/2013] [Accepted: 11/28/2013] [Indexed: 10/25/2022]
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48
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Zhang XL, Zheng C, Guo SS, Li J, Yang HH, Chen G. Turn-on fluorescence sensor for intracellular imaging of glutathione using g-C₃N₄ nanosheet-MnO₂ sandwich nanocomposite. Anal Chem 2014; 86:3426-34. [PMID: 24655132 DOI: 10.1021/ac500336f] [Citation(s) in RCA: 337] [Impact Index Per Article: 33.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Herein, a novel fluorescence sensor based on g-C3N4 nanosheet-MnO2 sandwich nanocomposite has been developed for rapid and selective sensing of glutathione (GSH) in aqueous solutions, as well as living cells. The graphitic-phase C3N4 (g-C3N4) nanosheet used here is a new type of carbon-based nanomaterial with high fluorescence quantum yield and high specific surface area. We demonstrate a facile one-step approach for the synthesis of a g-C3N4 nanosheet-MnO2 sandwich nanocomposite for the first time. The fluorescence of g-C3N4 nanosheet in this nanocomposite is quenched, which attributing to fluorescence resonance energy transfer (FRET) from a g-C3N4 nanosheet to the deposited MnO2. Upon the addition of GSH, MnO2 is reduced to Mn(2+), which leads to the elimination of FRET. As a result, the fluorescence of g-C3N4 nanosheet is restored. Importantly, the chemical response of the g-C3N4-MnO2 nanocomposite exhibits great selectivity toward GSH relative to other electrolytes and biomolecules. Under the optimal conditions, the detection limit of 0.2 μM for GSH in aqueous solutions can be reached. Furthermore, the g-C3N4-MnO2 nanocomposite is confirmed to be membrane-permeable and have low cytotoxicity. Moreover, we successfully apply this sensor for visualizing and monitoring change of the intracellular GSH in living cells. Moreover, the proposed sensor shows satisfying performance, such as low cost, easy preparation, rapid detection, good biocompatibility, and turn-on fluorescence response.
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Affiliation(s)
- Xiao-Long Zhang
- The Key Lab of Analysis and Detection Technology for Food Safety of the MOE, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry and Chemical Engineering, Fuzhou University , Fuzhou 350002, People's Republic of China
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49
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Zhou Z, Huang H, Chen Y, Liu F, Huang CZ, Li N. A distance-dependent metal-enhanced fluorescence sensing platform based on molecular beacon design. Biosens Bioelectron 2014; 52:367-73. [DOI: 10.1016/j.bios.2013.09.013] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2013] [Revised: 09/04/2013] [Accepted: 09/06/2013] [Indexed: 01/06/2023]
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50
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Lin JH, Tseng WL. Design of two and three input molecular logic gates using non-Watson–Crick base pairing-based molecular beacons. Analyst 2014; 139:1436-41. [DOI: 10.1039/c3an02298f] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
A single, resettable, and sensitive molecular beacon has been developed to operate two-input, three-input, and set–reset logic gates.
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Affiliation(s)
- Jia-Hui Lin
- Department of Chemistry
- National Sun Yat-sen University
- Kaohsiung 80424, Taiwan
| | - Wei-Lung Tseng
- Department of Chemistry
- National Sun Yat-sen University
- Kaohsiung 80424, Taiwan
- School of Pharmacy
- College of Pharmacy
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