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Yan W, Qin X, Sang X, Zhou X, Zheng Y, Yuan Y, Zhang Y. DNAzyme amplified dispersion state change of gold nanoparticles and its dual optical channels for ultrasensitive and facile detection of lead ion in preserved eggs. Food Chem 2024; 435:137538. [PMID: 37774625 DOI: 10.1016/j.foodchem.2023.137538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Revised: 09/13/2023] [Accepted: 09/18/2023] [Indexed: 10/01/2023]
Abstract
A dual-mode sensing platform for Pb2+ was constructed based on the dual optical channels of Au NPs system with the amplification of DNAzyme, and it was successfully applied for Pb2+ determination in preserved egg with satisfactory results. The presence of Pb2+ activated the DNAzyme and induced the dispersion change of Au NPs in high salt concentration. The sequent absorption change of Au NPs was translated to the fluorescence change of carbon dots through FRET, and the scattering change was transferred to grey value of images involving the Tyndall effect. Thus, a sensing platform based on fluorescence and colorimetric dual-technique was achieved for Pb2+ detection, under the optimized conditions. With the assistance of DNAzyme, the linear range of fluorometric and colorimetric method were 2.0 × 10-14 ∼ 8.0 × 10-10 mol/L and 2.4 × 10-13 ∼ 9.5 × 10-9 mol/L, respectively. The dual-mode sensing platform demonstrated its promising application in the environmental monitoring and food safety field.
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Affiliation(s)
- Wenju Yan
- Guangxi Key Laboratory of Electrochemical and Magneto-chemical Functional Materials, Guilin University of Technology, 12 Jiangan Road, Guilin 541004, China; College of Chemistry and Bioengineering, Guilin University of Technology, 12 Jiangan Road, Guilin 541004, China
| | - Xuefei Qin
- College of Chemistry and Bioengineering, Guilin University of Technology, 12 Jiangan Road, Guilin 541004, China
| | - Xueqing Sang
- College of Chemistry and Bioengineering, Guilin University of Technology, 12 Jiangan Road, Guilin 541004, China
| | - Xueying Zhou
- Guangxi Key Laboratory of Electrochemical and Magneto-chemical Functional Materials, Guilin University of Technology, 12 Jiangan Road, Guilin 541004, China; College of Chemistry and Bioengineering, Guilin University of Technology, 12 Jiangan Road, Guilin 541004, China
| | - Yanying Zheng
- Guangxi Key Laboratory of Electrochemical and Magneto-chemical Functional Materials, Guilin University of Technology, 12 Jiangan Road, Guilin 541004, China; College of Chemistry and Bioengineering, Guilin University of Technology, 12 Jiangan Road, Guilin 541004, China
| | - Yali Yuan
- Guangxi Key Laboratory of Electrochemical and Magneto-chemical Functional Materials, Guilin University of Technology, 12 Jiangan Road, Guilin 541004, China; College of Chemistry and Bioengineering, Guilin University of Technology, 12 Jiangan Road, Guilin 541004, China.
| | - Yun Zhang
- Guangxi Key Laboratory of Electrochemical and Magneto-chemical Functional Materials, Guilin University of Technology, 12 Jiangan Road, Guilin 541004, China; College of Chemistry and Bioengineering, Guilin University of Technology, 12 Jiangan Road, Guilin 541004, China
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2
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Liu F, Yuan Y, Zhang W, Fu Y, Yang M, Yang G, Liu H, Shen H, Li L. A highly sensitive and specific fluorescent strategy for the detection of Visfatin based on nonlinear hybridization chain reaction. Microchem J 2023. [DOI: 10.1016/j.microc.2023.108677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
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3
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Wu G, Zhao Y, Li X, Lu X, Qu T. Fluorescent probes based on the core-shell structure of molecular imprinted materials and gold nanoparticles for highly selective glutathione detection. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2022; 14:5034-5040. [PMID: 36468235 DOI: 10.1039/d2ay01363k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Glutathione (GSH) is a polypeptide with important physiological functions. Real-time and accurate detection of GSH is of great significance for clinical diagnosis, disease treatment and pathogen detection. A fluorescent nanosensor based on composite core-shell nanoparticles for the highly selective detection of GSH is reported. In the cores, the fluorescence of rhodamine b was quenched by using gold nanoparticles (AuNPs), and GSH could competitively combine with AuNPs to cause rhodamine b to fall off, thereby recovering the fluorescence. In the shell part, molecularly imprinted materials using oxidized glutathione (GSSG) as a pseudotemplate provide GSH/GSSG specific pores and improve the specificity and anti-interference ability of the sensor. The GSH sensor has a detection range of 0-100 μM and limit of detection (LOD) of 0.18 μM, and robust sensing performance in fetal bovine serum, indicating its great potential for clinical diagnosis.
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Affiliation(s)
- Guoli Wu
- Department of Pharmacy, Children's Hospital of Shanxi, Taiyuan 030013, China
| | - Yongdan Zhao
- College of Pharmacy, Shanxi Medical University, 56 Xinjian Nan Lu, Taiyuan 030001, China.
| | - Xiaofang Li
- College of Life Science, Inner Mongolia Agricultural University, Hohhot, 010000, China
| | - Xiaolin Lu
- College of Pharmacy, Shanxi Medical University, 56 Xinjian Nan Lu, Taiyuan 030001, China.
| | - Tingli Qu
- College of Pharmacy, Shanxi Medical University, 56 Xinjian Nan Lu, Taiyuan 030001, China.
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4
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Franco D, Calabrese G, Guglielmino SPP, Conoci S. Metal-Based Nanoparticles: Antibacterial Mechanisms and Biomedical Application. Microorganisms 2022; 10:microorganisms10091778. [PMID: 36144380 PMCID: PMC9503339 DOI: 10.3390/microorganisms10091778] [Citation(s) in RCA: 47] [Impact Index Per Article: 23.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 08/21/2022] [Accepted: 08/31/2022] [Indexed: 11/22/2022] Open
Abstract
The growing increase in antibiotic-resistant bacteria has led to the search for new antibacterial agents capable of overcoming the resistance problem. In recent years, nanoparticles (NPs) have been increasingly used to target bacteria as an alternative to antibiotics. The most promising nanomaterials for biomedical applications are metal and metal oxide NPs, due to their intrinsic antibacterial activity. Although NPs show interesting antibacterial properties, the mechanisms underlying their action are still poorly understood, limiting their use in clinical applications. In this review, an overview of the mechanisms underlying the antibacterial activity of metal and metal oxide NPs will be provided, relating their efficacy to: (i) bacterial strain; (ii) higher microbial organizations (biofilm); (iii) and physico-chemical properties of NPs. In addition, bacterial resistance strategies will be also discussed to better evaluate the feasibility of the different treatments adopted in the clinical safety fields. Finally, a wide analysis on recent biomedical applications of metal and metal oxide NPs with antibacterial activity will be provided.
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Affiliation(s)
- Domenico Franco
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale Ferdinando Stagno d’Alcontres, 31, 98168 Messina, Italy
| | - Giovanna Calabrese
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale Ferdinando Stagno d’Alcontres, 31, 98168 Messina, Italy
- Correspondence:
| | - Salvatore Pietro Paolo Guglielmino
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale Ferdinando Stagno d’Alcontres, 31, 98168 Messina, Italy
| | - Sabrina Conoci
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale Ferdinando Stagno d’Alcontres, 31, 98168 Messina, Italy
- Department of Chemistry ‘‘Giacomo Ciamician’’, University of Bologna, Via Selmi 2, 40126 Bologna, Italy
- LabSense Beyond Nano, URT Department of Physic, National Research Council (CNR), Viale Ferdinando Stagno d’Alcontres, 31, 98168 Messina, Italy
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5
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Faikhruea K, Choopara I, Somboonna N, Assavalapsakul W, Kim BH, Vilaivan T. Enhancing Peptide Nucleic Acid-Nanomaterial Interaction and Performance Improvement of Peptide Nucleic Acid-Based Nucleic Acid Detection by Using Electrostatic Effects. ACS APPLIED BIO MATERIALS 2022; 5:789-800. [PMID: 35119822 DOI: 10.1021/acsabm.1c01177] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Single-stranded peptide nucleic acid (PNA) probes interact strongly with several nanomaterials, and the interaction was diminished in the presence of complementary nucleic acid targets which forms the basis of many nucleic acid sensing platforms. As opposed to the negatively charged DNA probes, the charges on the PNA probes may be fine-tuned by incorporating amino acids with charged side chains. The contribution of electrostatic effects to the interaction between PNA probes and nanomaterials has been largely overlooked. This work reveals that electrostatic effects substantially enhanced the quenching of dye-labeled conformationally constrained pyrrolidinyl PNA probes by several nanomaterials including graphene oxide (GO), reduced graphene oxide, gold nanoparticles (AuNPs), and silver nanoparticles. The fluorescence quenching and the color change from red to purple in the case of AuNPs because of aggregation were inhibited in the presence of complementary nucleic acid targets. Thus, fluorescence and colorimetric assays for DNA and RNA that can distinguish even single-base-mismatched nucleic acids with improved sensitivity over conventional DNA probes were established. Both the GO- and AuNP-based sensing platforms have been successfully applied for the detection of real DNA and RNA samples in vitro and in living cells. This study emphasizes the active roles of electrostatic effects in the PNA-nanomaterial interactions, which paves the way toward improving the performance of PNA-nanomaterial based assays of nucleic acids.
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Affiliation(s)
- Kriangsak Faikhruea
- Organic Synthesis Research Unit, Department of Chemistry, Faculty of Science, Chulalongkorn University, Phayathai Road, Pathumwan, Bangkok 10330, Thailand
| | - Ilada Choopara
- Department of Microbiology, Faculty of Science, Chulalongkorn University, Phayathai Road, Pathumwan, Bangkok 10330, Thailand
| | - Naraporn Somboonna
- Department of Microbiology, Faculty of Science, Chulalongkorn University, Phayathai Road, Pathumwan, Bangkok 10330, Thailand
| | - Wanchai Assavalapsakul
- Department of Microbiology, Faculty of Science, Chulalongkorn University, Phayathai Road, Pathumwan, Bangkok 10330, Thailand
| | - Byeang Hyean Kim
- Department of Chemistry, Division of Advanced Materials Science, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
| | - Tirayut Vilaivan
- Organic Synthesis Research Unit, Department of Chemistry, Faculty of Science, Chulalongkorn University, Phayathai Road, Pathumwan, Bangkok 10330, Thailand
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Liu J, Wang T, Xiao B, Deng M, Yu P, Qing T. Fluorometric determination of the breast cancer 1 gene based on the target-induced conformational change of a DNA template for copper nanoclusters. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2021; 13:712-718. [PMID: 33480889 DOI: 10.1039/d0ay01712d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The breast cancer 1 (BRCA1) gene is a tumor suppressor gene, whose mutation is closely related to breast cancer. Therefore, the sensitive detection of the BRCA1 gene is extremely important for human health, particularly for women. In this study, a label-free fluorescent method based on hairpin DNA-templated copper nanoclusters (CuNCs) was for the first time developed for the detection of the BRCA1 gene. In the absence of target DNA, the detection system showed a strong red emission and produced a high emission peak. However, in the presence of the BRCA1 gene, the DNA probe hybridized with the BRCA1 gene and conformation of the DNA probe changed. As a result, the amount of produced CuNCs decreased and a low emission peak was obtained. The fluorescence intensity of the detection system was linearly correlated with the concentration of the BRCA1 gene ranging from 2 nM to 600 nM. The detectable limit was 2 nM for the BRCA1 gene assay, which was comparable with those reported by other non-amplifying sensors. Moreover, the developed method showed satisfactory recoveries for the BRCA1 gene assay in the bovine serum. The DNA-templated CuNC-based fluorescent assay thus offered a promising platform for the diagnosis of a breast cancer biomarker.
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Affiliation(s)
- Jing Liu
- School of Materials Science and Engineering, Xiangtan University, Xiangtan 411105, PR China.
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Gholami M, Salmasi MA, Sohouli E, Torabi B, Sohrabi MR, Rahimi-Nasrabadi M. A new nano biosensor for maitotoxin with high sensitivity and selectivity based fluorescence resonance energy transfer between carbon quantum dots and gold nanoparticles. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2020.112523] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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8
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Charoenpakdee C, Vilaivan T. Quenching of fluorescently labeled pyrrolidinyl peptide nucleic acid by oligodeoxyguanosine and its application in DNA sensing. Org Biomol Chem 2020; 18:5951-5962. [DOI: 10.1039/d0ob01299h] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Oligodeoxyguanosine effectively quenches the fluorescence of PNA probes via electrostatic interaction, and the signal is restored by the addition of complementary DNA targets.
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Affiliation(s)
- Chayan Charoenpakdee
- Organic Synthesis Research Unit
- Department of Chemistry
- Faculty of Science
- Chulalongkorn University
- Bangkok 10330
| | - Tirayut Vilaivan
- Organic Synthesis Research Unit
- Department of Chemistry
- Faculty of Science
- Chulalongkorn University
- Bangkok 10330
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Zhang F, Wang S, Liu J. Gold Nanoparticles Adsorb DNA and Aptamer Probes Too Strongly and a Comparison with Graphene Oxide for Biosensing. Anal Chem 2019; 91:14743-14750. [PMID: 31675214 DOI: 10.1021/acs.analchem.9b04142] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Using fluorescently labeled DNA oligonucleotides and nanomaterials for developing biosensors has been extensively reported for gold nanoparticles (AuNPs) and graphene oxide (GO) among others. These materials have vastly different affinities and mechanisms for interacting with DNA, and their analytical performance is likely to be different. In this work, we used several DNA sequences and, respectively, adsorbed them on AuNPs and GO to quench fluorescence. Different from previous work, we used KCN to fully dissolve the AuNPs to calculate the percentage of the desorbed DNA due to the complementary DNA (cDNA) and aptamer target. The desorbed probe DNA from the AuNPs was less than 5% for all of the targets including DNA, adenosine, Hg2+, and lysozyme, indicating a very strong DNA adsorption affinity. Desorption of DNA was achieved by adding HEPES buffer, NaCl, and As(III), but such desorption was attributed to the adsorption of these molecules or ions by the AuNPs instead of their interaction with the adsorbed DNA. For GO, more probes desorbed with addition of target analytes but so did nonspecific desorption by random DNA and proteins. In summary, AuNPs are unlikely to be a good surface for developing biosensors relying solely on the desorption of probe DNA, while for GO the main problem is nonspecific desorption.
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Affiliation(s)
- Fang Zhang
- College of Biological Science and Engineering , Fuzhou University , Fuzhou 350108 , People's Republic of China.,Department of Chemistry, Waterloo Institute for Nanotechnology , University of Waterloo , Waterloo , Ontario N2L 3G1 , Canada
| | - Shaoyun Wang
- College of Biological Science and Engineering , Fuzhou University , Fuzhou 350108 , People's Republic of China
| | - Juewen Liu
- Department of Chemistry, Waterloo Institute for Nanotechnology , University of Waterloo , Waterloo , Ontario N2L 3G1 , Canada
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10
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Preparation of graphene oxide quantum dots from waste toner, and their application to a fluorometric DNA hybridization assay. Mikrochim Acta 2019; 186:483. [DOI: 10.1007/s00604-019-3539-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2019] [Accepted: 05/22/2019] [Indexed: 01/19/2023]
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11
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Fluorescent C-NanoDots for rapid detection of BRCA1, CFTR and MRP3 gene mutations. Mikrochim Acta 2019; 186:293. [PMID: 31016506 DOI: 10.1007/s00604-019-3386-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2018] [Accepted: 03/29/2019] [Indexed: 10/27/2022]
Abstract
The authors report on a fluorometric method for the rapid detection of BRCA1, CFRT and MRP3 gene mutations. These are associated with breast cancer, cystic fibrosis and autoimmune hepatitis diseases, respectively. Carbon nanodots with blue fluorescence (with excitation/emission maxima at 340/440 nm) were synthesized and characterized, and their interactions with DNA were investigated. Changes in the fluorescence intensity following interaction with ssDNA and dsDNA were used for specific DNA sequence of BRCA1, CFRT and MRP3 genes detection. The response to DNAs is linear up to 200 nM and the detection limit is 270 pM. The assay selectivity allows the detection of single gene mutations. Under optimum conditions, the assay can rapidly discriminate between wild type and mutated samples. Graphical abstract Schematic representation of fluorescence assay for rapid detection of gene mutation based on fluorescent carbon nanodots.
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Chenab KK, Eivazzadeh-Keihan R, Maleki A, Pashazadeh-Panahi P, Hamblin MR, Mokhtarzadeh A. Biomedical applications of nanoflares: Targeted intracellular fluorescence probes. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2019; 17:342-358. [PMID: 30826476 DOI: 10.1016/j.nano.2019.02.006] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Revised: 01/08/2019] [Accepted: 02/11/2019] [Indexed: 12/16/2022]
Abstract
Nanoflares are intracellular probes consisting of oligonucleotides immobilized on various nanoparticles that can recognize intracellular nucleic acids or other analytes, thus releasing a fluorescent reporter dye. Single-stranded DNA (ssDNA) complementary to mRNA for a target gene is constructed containing a 3'-thiol for binding to gold nanoparticles. The ssDNA "recognition sequence" is prehybridized to a shorter DNA complement containing a fluorescent dye that is quenched. The functionalized gold nanoparticles are easily taken up into cells. When the ssDNA recognizes its complementary target, the fluorescent dye is released inside the cells. Different intracellular targets can be detected by nanoflares, such as mRNAs coding for genes over-expressed in cancer (epithelial-mesenchymal transition, oncogenes, thymidine kinase, telomerase, etc.), intracellular levels of ATP, pH values and inorganic ions can also be measured. Advantages include high transfection efficiency, enzymatic stability, good optical properties, biocompatibility, high selectivity and specificity. Multiplexed assays and FRET-based systems have been designed.
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Affiliation(s)
- Karim Khanmohammadi Chenab
- Catalysts and Organic Synthesis Research Laboratory, Department of Chemistry, Iran University of Science and Technology, Tehran, Iran
| | - Reza Eivazzadeh-Keihan
- Catalysts and Organic Synthesis Research Laboratory, Department of Chemistry, Iran University of Science and Technology, Tehran, Iran
| | - Ali Maleki
- Catalysts and Organic Synthesis Research Laboratory, Department of Chemistry, Iran University of Science and Technology, Tehran, Iran
| | - Paria Pashazadeh-Panahi
- Department of Biochemistry and Biophysics, Metabolic Disorders Research Center, Gorgan Faculty of Medicine, Golestan University of Medical Sciences, Gorgan, Golestan Province, Iran; Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Michael R Hamblin
- Wellman Center for Photomedicine, Massachusetts General Hospital, Boston, MA, USA; Department of Dermatology, Harvard Medical School, Boston, MA, USA; Harvard-MIT Division of Health Sciences and Technology, Cambridge, MA, USA.
| | - Ahad Mokhtarzadeh
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran; Department of Biotechnology, Higher Education Institute of Rab-Rashid, Tabriz, Iran.
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Park C, Park H, Lee HJ, Lee HS, Park KH, Choi CH, Na S. Double amplified colorimetric detection of DNA using gold nanoparticles, enzymes and a catalytic hairpin assembly. Mikrochim Acta 2018; 186:34. [PMID: 30564970 DOI: 10.1007/s00604-018-3154-2] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2018] [Accepted: 12/07/2018] [Indexed: 02/07/2023]
Abstract
The authors describe an isothermal and ultrasensitive colorimetric DNA assay that consists of two amplification stages using enzymes and a catalytic hairpin assembly (CHA). The first step consists in the selective amplification of DNA using Klenow fragment and nicking enzyme. The second step consists in the amplification of the optical signal by using a catalytic hairpin assembly. After two amplification steps, the DNA reaction induces the aggregation of the red gold nanoparticles to give a blue color shift. The degree of aggregation can be quantified by measurement of the ratio of the UV-vis absorbances of the solutions at 620 and 524 nm which are the wavelengths of the aggregated gold nanoparticles and bare gold nanoparticles. The detection limit is as low as 3.1 fM. Due to the use of a specific enzyme, only the desired DNAs will be detected. The method can be applied to the determination of DNA of various lengths. Despite the presence of large amounts of wildtype DNA, it can readily detect a target DNA. Conceivably, the technique has a large potential because of its high sensitivity and selectivity. Graphical abstract Schematic presentation of DNA detection using gold nanoparticles (AuNP), enzymes and catalytic hairpin assembly (CHA). Effective DNA detection is achieved through the aggregation of AuNPs which is caused by DNA amplification using enzymes and signal amplification using CHA.
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Affiliation(s)
- Chanho Park
- Department of Mechanical Engineering, Korea University, Seoul, 136-701, Republic of Korea
| | - Hyunjun Park
- Department of Mechanical Engineering, Korea University, Seoul, 136-701, Republic of Korea
| | - Hye Jin Lee
- Division of Oncology/Hematology, Department of Internal Medicine, Korea University, Seoul, 136-701, South Korea
| | - Hye Sun Lee
- Division of Oncology/Hematology, Department of Internal Medicine, Korea University, Seoul, 136-701, South Korea
| | - Kyong Hwa Park
- Division of Oncology/Hematology, Department of Internal Medicine, Korea University, Seoul, 136-701, South Korea
| | - Chang-Hwan Choi
- Department of Mechanical Engineering, Stevens Institute of Technology, Hoboken, NJ, 07030, USA
| | - Sungsoo Na
- Department of Mechanical Engineering, Korea University, Seoul, 136-701, Republic of Korea.
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Colorimetric DNA assay by exploiting the DNA-controlled peroxidase mimicking activity of mesoporous silica loaded with platinum nanoparticles. Mikrochim Acta 2018; 185:544. [PMID: 30421071 DOI: 10.1007/s00604-018-3026-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Accepted: 09/24/2018] [Indexed: 11/27/2022]
Abstract
A nanozyme composed of mesoporous silica and platinum nanoparticles (MS-PtNPs) was synthesized and is shown to display peroxidase-like activity. Its activity can be controlled by loading with single-stranded DNA. The PtNPs on the MS are homogeneously distributed and act as enzyme mimics. The adsorption of DNA probe on the MS blocks the nucleation sites of PtNPs. This leads to a decrease in the peroxidase-mimicking activity. After introduction of target DNA that is complementary to the DNA probe, the activity of the nanozyme is recovered. By using the 3,3,5,5-tetramethylbenzidine/H2O2 chromogenic system, a rapid method was developed for colorimetric determination of DNA. The assay, best performed at 450 nm, has a linear response in the 5 nM to 100 nM DNA concentration range and a 2.6 nM detection limit. It possesses high selectivity and can distinguish even a single-base mismatch. Graphical abstract The peroxidase-like activity of mesoporous silica and platinum nanoparticles (MS-PtNPs) was depressed when noncovalent ssDNA-MS was in-situ deposited on the PtNPs. After introduction of target DNA, the complementary dsDNA releases from the MS, and then its activity is recovered.
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Ravan H, Fozooni T, Amandadi M, Sasan H, Norouzi A. DNAzyme-embedded hyperbranched DNA dendrimers as signal amplifiers for colorimetric determination of nucleic acids. Mikrochim Acta 2018; 185:443. [DOI: 10.1007/s00604-018-2975-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2018] [Accepted: 08/23/2018] [Indexed: 12/25/2022]
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16
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Li S, Liu X, Pang S, Lu R, Liu Y, Fan M, Jia Z, Bai H. Voltammetric determination of DNA based on regulation of DNA strand displacement using an allosteric DNA toehold. Mikrochim Acta 2018; 185:433. [DOI: 10.1007/s00604-018-2967-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2018] [Accepted: 08/18/2018] [Indexed: 01/07/2023]
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