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Song SS, Liu W, Bao JY, Zhu HT, Wang AJ, Song P, Yuan PX, Feng JJ. Photodynamic-Assisted Electrochemiluminescence Enhancement toward Advanced BODIPY for Precision Diagnosis of Parkinson. Anal Chem 2024; 96:8586-8593. [PMID: 38728058 DOI: 10.1021/acs.analchem.4c00607] [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: 05/29/2024]
Abstract
Nowadays, signal enhancement is imperative to increase sensitivity of advanced ECL devices for expediting their promising applications in clinic. In this work, photodynamic-assisted electrochemiluminescence (PDECL) device was constructed for precision diagnosis of Parkinson, where an advanced emitter was prepared by electrostatically linking 2,6-dimethyl-8-(3-carboxyphenyl)4,4'-difluoroboradiazene (BET) with 1-butyl-3-methylimidazole tetrafluoroborate ([BMIm][BF4]). Specifically, protoporphyrin IX (PPIX) can trigger the photodynamic reaction under light irradiation with a wavelength of 450 nm to generate lots of singlet oxygen (1O2), showing a 2.43-fold magnification in the ECL responses. Then, the aptamer (Apt) was assembled on the functional BET-[BMIm] for constructing a "signal off" ECL biosensor. Later on, the PPIX was embedded into the G-quadruplex (G4) of the Apt to magnify the ECL signals for bioanalysis of α-synuclein (α-syn) under light excitation. In the optimized surroundings, the resulting PDECL sensor has a broad linear range of 100.0 aM ∼ 10.0 fM and a low limit of detection (LOD) of 63 aM, coupled by differentiating Parkinson patients from normal individuals according to the receiver operating characteristic (ROC) curve analysis of actual blood samples. Such research holds great promise for synthesis of other advanced luminophores, combined with achieving an early clinical diagnosis.
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Affiliation(s)
- Shu-Shu Song
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Materials Science, College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China
| | - Wen Liu
- Department of Neurosurgery, Zhongnan Hospital of Wuhan University, Donghu Road 169, Wuhan 430071, China
| | - Jing-Yi Bao
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Materials Science, College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China
| | - Hao-Tian Zhu
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Materials Science, College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China
| | - Ai-Jun Wang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Materials Science, College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China
| | - Pei Song
- Affiliated Jinhua Hospital, Zhejiang University School of Medicine, Jinhua 321000, China
| | - Pei-Xin Yuan
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Materials Science, College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China
| | - Jiu-Ju Feng
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, College of Chemistry and Materials Science, College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China
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Current Trends and Challenges in Point-of-care Urinalysis of Biomarkers in Trace Amounts. Trends Analyt Chem 2022. [DOI: 10.1016/j.trac.2022.116786] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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3
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Sakonsinsiri C, Puangmali T, Sreejivungsa K, Koowattanasuchat S, Thanan R, Chompoosor A, Kulchat S, Sithithaworn P. Aptamer-based colorimetric detection of the DNA damage marker 8-oxo-dG using cysteamine-stabilised gold nanoparticles. RSC Adv 2022; 12:25478-25486. [PMID: 36199304 PMCID: PMC9450492 DOI: 10.1039/d2ra01858f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Accepted: 08/23/2022] [Indexed: 11/22/2022] Open
Abstract
8-Oxo-7,8-dihydro-2′-deoxyguanosine (8-oxo-dG) is a crucial biomarker for oxidative DNA damage and carcinogenesis. Current strategies for 8-oxo-dG detection often require sophisticated instruments and qualified personnel. In this study, cysteamine-stabilised gold nanoparticles (cyst-AuNPs) were synthesised and used for colorimetric detection of 8-oxo-dG in urine. Sensing of 8-oxo-dG is based on the anti-aggregation of cyst-AuNPs, mediated by the specific recognition of 8-oxo-dG and its aptamer. In the absence of 8-oxo-dG, the aptamer was adsorbed onto the surface of cyst-AuNPs, resulting in aggregation and the development of a purple colour solution. Upon addition of the target molecule 8-oxo-dG, the aptamer specifically bound to it and could not induce the aggregation of cyst-AuNPs, leading to the dispersion of cyst-AuNPs in the solution. Simple visual examination could be used to monitor the purple-to-red colour change that started at 12 nM, a threshold concentration for visual analysis. The absorbance at 525 nm increased in direct relation to the number of the target molecule 8-oxo-dG. This aptamer/cyst-AuNPs system showed excellent sensing ability for the 8-oxo-dG concentration in the range of 15–100 nM, with a detection limit as low as 10.3 nM and a detection time of 30 min. Interference experiments showed that the developed colorimetric strategy had a good sensitivity. This simple and rapid colorimetric method has successfully been applied to inspect 8-oxo-dG concentration in real urine samples and provided recoveries between 93.6 and 94.1%, with a limit of quantification (LOQ) of 34.3 nM, which was comparable with an enzyme-linked immunosorbent-based detection of 8-oxo-dG. This new, easy-to-use, and rapid method could be used as an alternative and initiative strategy for the development of an on-site analysis of 8-oxo-dG in urine. A colorimetric assay based on cysteamine-stabilized AuNPs and anti-8-oxo-dG aptamers for the detection of 8-oxo-7,8-dihydro-2′-deoxyguanosine (8-oxo-dG), which is a critical DNA damage marker, was developed.![]()
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Affiliation(s)
- Chadamas Sakonsinsiri
- Department of Biochemistry, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand
- Cholangiocarcinoma Research Institute, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Theerapong Puangmali
- Department of Physics, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Kaniknun Sreejivungsa
- Department of Biochemistry, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand
| | | | - Raynoo Thanan
- Department of Biochemistry, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand
- Cholangiocarcinoma Research Institute, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Apiwat Chompoosor
- Department of Chemistry, Faculty of Science, Ramkhamhaeng University, Bangkok 10240, Thailand
| | - Sirinan Kulchat
- Department of Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Paiboon Sithithaworn
- Department of Parasitology, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand
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4
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Li Z, Meng Y, Nie H, Gu R, Wang X, Xiao D. The unique physical shading pattern of Rayleigh scattering for the generally improved detection of scattering particles. Analyst 2022; 147:2361-2368. [DOI: 10.1039/d2an00488g] [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]
Abstract
A facile physical shading method, based on the Rayleigh scattering pattern, exhibited excellent performance detection because of its reduced background noise.
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Affiliation(s)
- Zhihui Li
- College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
| | - Yan Meng
- Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu 610064, P. R. China
| | - Hongyu Nie
- College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
| | - Rongmeng Gu
- College of Chemical Engineering, Sichuan University, Chengdu 610064, P. R. China
| | - Xiaokun Wang
- College of Chemical Engineering, Sichuan University, Chengdu 610064, P. R. China
| | - Dan Xiao
- College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
- Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu 610064, P. R. China
- College of Chemical Engineering, Sichuan University, Chengdu 610064, P. R. China
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Pla L, Sancenón F, Martínez-Bisbal MC, Bañuls C, Estañ N, Botello-Marabotto M, Aznar E, Sáez G, Santiago-Felipe S, Martínez-Máñez R. A new 8-oxo-7,8-2'deoxyguanosine nanoporous anodic alumina aptasensor for colorectal cancer diagnosis in blood and urine. NANOSCALE 2021; 13:8648-8657. [PMID: 33942038 DOI: 10.1039/d0nr07948k] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Many important human diseases, and especially cancer, have been related to the overproduction of 8-oxo-7,8-dihydro-2'-deoxyguanosine (8-oxo-dG). This molecule is a product of oxidative stress processes over nucleophilic bases in DNA. In this work, an aptasensor for the rapid, selective and accurate detection of this oncomarker is presented. The aptasensor consists of a nanoporous anodic alumina material loaded with a dye and is functionalized with an aptamer-based "molecular gate". In the presence of target 8-oxo-dG, the capping aptamer displaces from the surface due to the high affinity of the analyte with the capping aptamer, thus inducing delivery of the preloaded fluorescent dye. In contrast, in the absence of 8-oxo-dG, a poor payload delivery is accomplished. This aptamer-based nanodevice has great sensitivity for 8-oxo-dG, resulting in a LOD of 1 nM and a detection time of ca. 60 min. Moreover, the aptasensor is able to accurately detect 8-oxo-dG in unmodified urine and serum without pre-concentration treatments. This diagnostic tool is validated in a set of 38 urine and serum samples from patients diagnosed of colorectal cancer and control patients. These samples are also analyzed using a standardized and specific ELISA kit. The aptasensor displays excellent sensitivity (95.83/100%) and specificity (80/100%) for 8-oxo-dG detection in serum and urine samples, respectively. Our results may serve as a basis for the development of generalized fluorogenic diagnostic platforms for the easy diagnosis of cancer in biofluids as well as for monitoring therapeutic treatments and detection of relapses without the use of expensive equipment or trained personnel.
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Affiliation(s)
- Luis Pla
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Spain and Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico, Universitat Politècnica de València - Universitat de València, Camino de Vera s/n, 46022, Valencia, Spain. and Unidad Mixta de Investigación en Nanomedicina y Sensores. Universitat Politècnica de València - Instituto de Investigación Sanitaria La Fe, Valencia, Spain
| | - Félix Sancenón
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Spain and Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico, Universitat Politècnica de València - Universitat de València, Camino de Vera s/n, 46022, Valencia, Spain. and Unidad Mixta de Investigación en Nanomedicina y Sensores. Universitat Politècnica de València - Instituto de Investigación Sanitaria La Fe, Valencia, Spain and Unidad Mixta UPV-CIPF de Investigación en Mecanismos de Enfermedades y Nanomedicina. Universitat Politècnica de València, Centro de Investigación Príncipe Felipe, Valencia, Spain and Departamento de Química, Universitat Politècnica de València, Valencia, Spain
| | - M Carmen Martínez-Bisbal
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Spain and Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico, Universitat Politècnica de València - Universitat de València, Camino de Vera s/n, 46022, Valencia, Spain. and Unidad Mixta de Investigación en Nanomedicina y Sensores. Universitat Politècnica de València - Instituto de Investigación Sanitaria La Fe, Valencia, Spain and Unidad Mixta UPV-CIPF de Investigación en Mecanismos de Enfermedades y Nanomedicina. Universitat Politècnica de València, Centro de Investigación Príncipe Felipe, Valencia, Spain and Departamento de Química Física. Universitat de València, Burjasot, Valencia, Spain
| | - Celia Bañuls
- Servicio de Endocrinología y Nutrición. Hospital Universitario Dr Peset-FISABIO, Valencia, Spain
| | - Nuria Estañ
- Departamento de Bioquímica y Biología Molecular, Facultad de Medicina y Odontología-INCLIVA, Universitat de València, Valencia, Spain and Servicio de Análisis Clínicos, Hospital Universitario Dr Peset-FISABIO, Valencia, Spain
| | - Marina Botello-Marabotto
- Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico, Universitat Politècnica de València - Universitat de València, Camino de Vera s/n, 46022, Valencia, Spain. and Unidad Mixta de Investigación en Nanomedicina y Sensores. Universitat Politècnica de València - Instituto de Investigación Sanitaria La Fe, Valencia, Spain
| | - Elena Aznar
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Spain and Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico, Universitat Politècnica de València - Universitat de València, Camino de Vera s/n, 46022, Valencia, Spain. and Unidad Mixta de Investigación en Nanomedicina y Sensores. Universitat Politècnica de València - Instituto de Investigación Sanitaria La Fe, Valencia, Spain and Unidad Mixta UPV-CIPF de Investigación en Mecanismos de Enfermedades y Nanomedicina. Universitat Politècnica de València, Centro de Investigación Príncipe Felipe, Valencia, Spain and Departamento de Química, Universitat Politècnica de València, Valencia, Spain
| | - Guillermo Sáez
- Departamento de Bioquímica y Biología Molecular, Facultad de Medicina y Odontología-INCLIVA, Universitat de València, Valencia, Spain and Servicio de Análisis Clínicos, Hospital Universitario Dr Peset-FISABIO, Valencia, Spain
| | - Sara Santiago-Felipe
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Spain and Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico, Universitat Politècnica de València - Universitat de València, Camino de Vera s/n, 46022, Valencia, Spain. and Unidad Mixta de Investigación en Nanomedicina y Sensores. Universitat Politècnica de València - Instituto de Investigación Sanitaria La Fe, Valencia, Spain
| | - Ramón Martínez-Máñez
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Spain and Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico, Universitat Politècnica de València - Universitat de València, Camino de Vera s/n, 46022, Valencia, Spain. and Unidad Mixta de Investigación en Nanomedicina y Sensores. Universitat Politècnica de València - Instituto de Investigación Sanitaria La Fe, Valencia, Spain and Unidad Mixta UPV-CIPF de Investigación en Mecanismos de Enfermedades y Nanomedicina. Universitat Politècnica de València, Centro de Investigación Príncipe Felipe, Valencia, Spain and Departamento de Química, Universitat Politècnica de València, Valencia, Spain
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6
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Matulakul P, Vongpramate D, Kulchat S, Chompoosor A, Thanan R, Sithithaworn P, Sakonsinsiri C, Puangmali T. Development of Low-Cost AuNP-Based Aptasensors with Truncated Aptamer for Highly Sensitive Detection of 8-Oxo-dG in Urine. ACS OMEGA 2020; 5:17423-17430. [PMID: 32715227 PMCID: PMC7377066 DOI: 10.1021/acsomega.0c01834] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Accepted: 06/24/2020] [Indexed: 06/11/2023]
Abstract
8-Oxo-7,8-dihydro-2'-deoxyguanosine (8-oxo-dG), an oxidized form of guanosine residues, is a critical biomarker for various cancers. Herein, a sensitive citrate-capped gold nanoparticle-based aptasensor device has been developed for the detection of 8-oxo-dG in urine. We previously designed a 38-nt anti-8-oxo-dG-aptamer by a computer simulation and the experimental validation has been performed in the present work. The analytical performance of the 38-nt aptamer from the in silico design was compared with the parent 66-nt aptamer. This assay is based on the principle of salt-induced aggregation of citrate-capped gold nanoparticles. Based on this sensing mechanism, the difference between the absorbance in the presence and absence of 8-oxo-dG at λ = 525 nm (ΔA525) increased linearly as a function of 8-oxo-dG concentrations in the ranges of 10-100 and 15-100 nM for 38-nt and 66-nt aptasensors, respectively. This method can provide detection limits of 6.4 nM for 8-oxo-dG in the 38-nt aptasensor and 13.2 nM in the 66-nt aptasensor. Similar to the 66-nt aptamer, the shortened aptamer, 38-nt long, can provide high sensitivity and selectivity with rapid detection time. In addition, using the 38-nt aptamer as a recognition component in the developed portable low-cost device showed high sensitivity in the detection range of 15-100 nM with a detection limit of 12.9 nM, which is much lower than the threshold value (280 nM) for normal human urine. This easy-to-use device could effectively and economically be utilized for monitoring 8-oxo-dG in real urine samples and potentially serve as a prototype for a commercial device.
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Affiliation(s)
- Piyaporn Matulakul
- Materials
Science and Nanotechnology Program, Department of Physics, Faculty
of Science, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Drusawin Vongpramate
- Department
of Information Technology, Faculty of Science, Buriram Rajabhat University, Buriram 31000, Thailand
| | - Sirinan Kulchat
- Department
of Chemistry, Faculty of Science, Khon Kaen
University, Khon Kaen 40002, Thailand
| | - Apiwat Chompoosor
- Department
of Chemistry, Faculty of Science, Ramkhamhaeng
University, Bangkok 10240, Thailand
| | - Raynoo Thanan
- Department
of Biochemistry, Faculty of Medicine, Khon
Kaen University, Khon Kaen 40002, Thailand
- Cholangiocarcinoma
Research Institute (CARI), Khon Kaen University, Khon Kaen 40002, Thailand
- Cholangiocarcinoma
Screening and Care Program (CASCAP), Khon
Kaen University, Khon Kaen 40002, Thailand
| | - Paiboon Sithithaworn
- Cholangiocarcinoma
Research Institute (CARI), Khon Kaen University, Khon Kaen 40002, Thailand
- Cholangiocarcinoma
Screening and Care Program (CASCAP), Khon
Kaen University, Khon Kaen 40002, Thailand
- Department
of Parasitology, Faculty of Medicine, Khon
Kaen University, Khon Kaen 40002, Thailand
| | - Chadamas Sakonsinsiri
- Department
of Biochemistry, Faculty of Medicine, Khon
Kaen University, Khon Kaen 40002, Thailand
- Cholangiocarcinoma
Research Institute (CARI), Khon Kaen University, Khon Kaen 40002, Thailand
- Cholangiocarcinoma
Screening and Care Program (CASCAP), Khon
Kaen University, Khon Kaen 40002, Thailand
| | - Theerapong Puangmali
- Materials
Science and Nanotechnology Program, Department of Physics, Faculty
of Science, Khon Kaen University, Khon Kaen 40002, Thailand
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7
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The Detection of 8-Oxo-7,8-Dihydro-2′-Deoxyguanosine in Circulating Cell-Free DNA: A Step Towards Longitudinal Monitoring of Health. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2020; 1241:125-138. [DOI: 10.1007/978-3-030-41283-8_8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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8
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Jia LP, Feng Z, Zhao RN, Ma RN, Zhang W, Shang L, Jia WL, Wang HS. Enzyme-free and triple-amplified electrochemical sensing of 8-hydroxy-2'-deoxyguanosine by three kinds of short pDNA-driven catalyzed hairpin assemblies followed by a hybridization chain reaction. Analyst 2020; 145:3605-3611. [PMID: 32266898 DOI: 10.1039/d0an00233j] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
A sensitive and enzyme-free electrochemical aptasensor was constructed for the sensing of 8-hydroxy-2'-deoxyguanosine (8-OH-dG). In the process of constructing the aptasensor, triple signal amplification strategies were introduced to enhance the sensitivity. First, every aptamer/pDNA complex immobilized on magnetic beads could release three kinds of pDNAs when 8-OH-dG was introduced, which caused three-fold magnification of the target. Second, the released three kinds of pDNAs initiated catalyzed hairpin assembly between two hairpin DNAs (HP1 and HP2) on a gold electrode. Meanwhile, the three kinds of pDNAs were released again by a strand displacement reaction to obtain the next catalyzed hairpin assembly. Third, the emerging toehold of HP2 further induced a hybridization chain reaction (HCR) between two hairpin DNAs (HP3 and HP4), forming a long double-stranded DNA concatemer on the surface of the electrode. Finally, [Ru(NH3)6]3+, an electroactive cation, was adsorbed onto the long dsDNA concatemer by electrostatic interactions and consequently, an electrochemical signal was generated. Under this triple signal amplification, a low detection limit down to 24.34 fM has been obtained for 8-OH-dG determination, which is superior to those of most previously reported methods.
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Affiliation(s)
- Li-Ping Jia
- Department of Chemistry, Liaocheng University, Liaocheng, Shandong 252000, China.
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9
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Hu W, Chen T, Zhang Y, Ye W. A carbon dot and gold nanoparticle-based fluorometric immunoassay for 8-hydroxy-2'-deoxyguanosine in oxidatively damaged DNA. Mikrochim Acta 2019; 186:303. [PMID: 31028477 DOI: 10.1007/s00604-019-3392-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2018] [Accepted: 03/29/2019] [Indexed: 01/04/2023]
Abstract
A method is described for the fluorometric determination of DNA containing oxidatively damaged product 8-hydroxy-2'-deoxyguanosine (DNA-8-OHdG). Carbon dots (CDs) were modified with glutaraldehyde for DNA conjugation, and antibody against 8-OHdG was immobilized on gold nanoparticles (AuNPs). The presence of DNA-8-OHdG can be linked to CDs by reaction of amino groups on DNA with glutaraldehyde. AuNPs were brought closely to CDs by specific immune reaction between 8-OHdG and antibody on AuNPs. Under 350 nm photoexcitation, the emission of CDs with a peak at 440 nm is quenched by the AuNPs and not restored. In the presence of DNA-8-OHdG, the measured fluorescence intensity decreases and quenching efficiency increases. The limit of detection is 700 pM, and the assay works in the 0.01 nM to 25 μM DNA-8-OHdG concentration range. The method is perceived to possess a good potential as a tool for detecting biomarkers for DNA damage due to oxidative stress. Graphical abstract A fluorometric immunoassay for detecting 8-hydroxy-2'-deoxyguanosine (8-OHdG) in oxidatively damaged DNA is reported. It is based on the use of carbon dots (CDs) and gold nanoparticles (AuNPs). Black wavy lines represent DNA. Yellow polygonal sharps represent 8-OHdG. Blue and pink balls represent CDs and AuNPs, respectively.
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Affiliation(s)
- Wei Hu
- Institute of Ocean Research, Zhejiang University of Technology, Hangzhou, 310014, People's Republic of China.,Department of Food Science and Technology, Zhejiang University of Technology, Hangzhou, 310014, People's Republic of China
| | - Tian Chen
- Institute of Ocean Research, Zhejiang University of Technology, Hangzhou, 310014, People's Republic of China.,Department of Food Science and Technology, Zhejiang University of Technology, Hangzhou, 310014, People's Republic of China
| | - Yu Zhang
- Institute of Ocean Research, Zhejiang University of Technology, Hangzhou, 310014, People's Republic of China.,Department of Food Science and Technology, Zhejiang University of Technology, Hangzhou, 310014, People's Republic of China
| | - Weiwei Ye
- Institute of Ocean Research, Zhejiang University of Technology, Hangzhou, 310014, People's Republic of China. .,Department of Food Science and Technology, Zhejiang University of Technology, Hangzhou, 310014, People's Republic of China.
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Zhu Y, Gu X, Jiang F, Jia R, Jin M, Chen M, Zhang G. Ultrasensitive detection of Bisphenol A based on an aptasensor with DNA amplification. FOOD AGR IMMUNOL 2018. [DOI: 10.1080/09540105.2018.1515893] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
Affiliation(s)
- Yingyue Zhu
- School of Biotechnology and Food Engineering, Changshu Institute of Technology, Changshu, People’s Republic of China
- Key Laboratory of Food Quality and Safety of Suzhou, Changshu Institute of Technology, Changshu, People’s Republic of China
| | - Xiangyuan Gu
- School of Biotechnology and Food Engineering, Changshu Institute of Technology, Changshu, People’s Republic of China
| | - Feng Jiang
- School of Biotechnology and Food Engineering, Changshu Institute of Technology, Changshu, People’s Republic of China
| | - Rui Jia
- School of Biotechnology and Food Engineering, Changshu Institute of Technology, Changshu, People’s Republic of China
| | - Mengyi Jin
- School of Biotechnology and Food Engineering, Changshu Institute of Technology, Changshu, People’s Republic of China
| | - Menglin Chen
- School of Biotechnology and Food Engineering, Changshu Institute of Technology, Changshu, People’s Republic of China
- Key Laboratory of Food Quality and Safety of Suzhou, Changshu Institute of Technology, Changshu, People’s Republic of China
| | - Genhua Zhang
- Key Laboratory of Food Quality and Safety of Suzhou, Changshu Institute of Technology, Changshu, People’s Republic of China
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11
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Wei W, Wei M, Yin L, Pu Y, Liu S. Improving the fluorometric determination of the cancer biomarker 8-hydroxy-2'-deoxyguanosine by using a 3D DNA nanomachine. Mikrochim Acta 2018; 185:494. [PMID: 30284093 DOI: 10.1007/s00604-018-3036-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Accepted: 09/28/2018] [Indexed: 11/30/2022]
Abstract
The authors describe a fluorometric method for improving the determination of the cancer biomarker 8-hydroxy-2'-deoxyguanosine (8-OHdG). A nicking endonuclease (NEase)-powered 3-D DNA nanomachine was constructed by assembling hundreds of carboxyfluorescein-labeled single strand oligonucleotides (acting as signal reporter) and tens of swing arms (acting as single-foot DNA walkers) on a gold nanoparticle (AuNP). The activity of this DNA nanomachine was controlled by introducing the protecting oligonucleotides. In the presence of aptamer against 8-OHdG, the protecting oligonucleotides are removed from the swing arms by toehold-mediated strand displacement reaction. In the next step, detached DNA walker hybridizes to the labelled DNA so that the DNA nanomachine becomes activated. Special sequences of signal reporter in the formed duplex can be recognized and cleaved by NEase. As a result, the DNA walker autonomously and progressively moves along the surface of the AuNP, thereby releasing hundreds of signal reporters and causing a rapid increase in green fluorescence. This 3-D nanomachine is highly efficient because one aptamer can release hundreds of signal reporters. These unique properties allowed for the construction of a DNA nanomachine-based method for sensitively detecting 8-OHdG in concentrations as low as 4 pM. This is three orders of magnitude lower compared to previously reported methods. Graphical abstract Schematic of a fluorometric method for determination of the cancer biomarker 8-hydroxy-2'-deoxyguanosine. A nicking endonuclease powered 3D-DNA nanomachine was used to improve the sensitivity. Limit of detection is three orders of magnitude lower than reported methods.
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Affiliation(s)
- Wei Wei
- Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, Jiangsu Province Hi-Tech Key Laboratory for Bio-medical Research, School of Chemistry and Chemical Engineering, Southeast University, Nanjing, 211189, China.
| | - Min Wei
- College of Food Science and Technology, Henan University of Technology, Zhengzhou, 450001, China
| | - Lihong Yin
- Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, Jiangsu Province Hi-Tech Key Laboratory for Bio-medical Research, School of Chemistry and Chemical Engineering, Southeast University, Nanjing, 211189, China
| | - Yuepu Pu
- Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, Jiangsu Province Hi-Tech Key Laboratory for Bio-medical Research, School of Chemistry and Chemical Engineering, Southeast University, Nanjing, 211189, China
| | - Songqin Liu
- Jiangsu Engineering Laboratory of Smart Carbon-Rich Materials and Device, Jiangsu Province Hi-Tech Key Laboratory for Bio-medical Research, School of Chemistry and Chemical Engineering, Southeast University, Nanjing, 211189, China
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12
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Tao L, Yue Q, Hou Y, Wang Y, Chen C, Li CZ. Resonance light scattering aptasensor for urinary 8-hydroxy-2'-deoxyguanosine based on magnetic nanoparticles: a preliminary study of oxidative stress association with air pollution. Mikrochim Acta 2018; 185:419. [PMID: 30121832 DOI: 10.1007/s00604-018-2937-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Accepted: 07/26/2018] [Indexed: 02/07/2023]
Abstract
An aptamer based method is described for the determination of 8-hydroxy-2'-deoxyguanosine (8-OHdG) using resonance light scattering (RLS). Magnetic nanoparticles (MNPs) were employed as RLS probes. The probe DNA was placed on the surface of MNPs, which produces a rather low RLS signal. If, however, probe DNA hybridizes with the aptamer against 8-OHdG, a sandwich structure will be formed. This results in a significant enhancement of RLS intensity. The aptamer was used as the recognition element to capture 8-OHdG. 8-OHdG has a stronger affinity for the aptamer than probe DNA, and the conformation of the aptamer therefore switches from a double-stranded to a G-quadruplex structure. As a result, MNPs labeled with probe DNA are released, and RLS intensity decreases. The method allows 8-OHdG to be detected with a linear response in the 32 pM - 12.0 nM concentration range and an 11 pM limit of detection (at 3.29SB/m, according to the recent recommendation of IUPAC). The MNPs can be reused 5 times by applying an external magnetic field for collection. The method was successfully applied to analyze human urine samples for its content of 8-OHdG. It was also found that the levels of 8-OHdG noticeably increased with the increase of the Air Quality Index. Conceivably, the method is a viable tool to investigate the relationship between 8-OHdG levels and the effect of air pollution. Graphical abstract A reusable sensing strategy was constructed to detect urinary 8-OHdG based on "turn-off" resonance light scattering. The LOD was as low as 11 pM. This study showed some preliminary data for the association between oxidative stress and air pollution.
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Affiliation(s)
- Lixia Tao
- Department of Chemistry, Liaocheng University, Liaocheng, 252059, China
| | - Qiaoli Yue
- Department of Chemistry, Liaocheng University, Liaocheng, 252059, China.
| | - Yining Hou
- Department of Chemistry, Liaocheng University, Liaocheng, 252059, China
| | - Yongping Wang
- Department of Chemistry, Liaocheng University, Liaocheng, 252059, China
| | - Chunying Chen
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, National Center for Nanoscience and Technology of China and Institute of High Energy Physics, Chinese Academy of Sciences (CAS), Beijing, 100190, China
| | - Chen-Zhong Li
- Department of Chemistry, Liaocheng University, Liaocheng, 252059, China. .,Nanobioengineering/Bioelectronics Laboratory, Department of Biomedical Engineering, Florida International University, Miami, FL, 33174, USA.
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Ammanath G, Yildiz UH, Palaniappan A, Liedberg B. Luminescent Device for the Detection of Oxidative Stress Biomarkers in Artificial Urine. ACS APPLIED MATERIALS & INTERFACES 2018; 10:7730-7736. [PMID: 29430928 DOI: 10.1021/acsami.7b17252] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
A luminescent paper-based device for the visual detection of oxidative stress biomarkers is reported. The device consists of a polyvinylidene fluoride membrane impregnated with poly(3-alkoxy-4-methylthiophene) (PT) for colorimetric detection. 8-hydroxy-2'-deoxyguanosine (8-OHdG), a biomarker associated with oxidative stress, is used as a model system for validating the proposed methodology. The detection strategy is based on monitoring the changes in optical properties of PT associated with its conformational changes upon interaction with an aptamer in the presence and in the absence of 8-OHdG. Fluorometric and colorimetric monitoring revealed linear responses for 8-OHdG concentrations between 50 pM and 500 nM (∼14 pg/mL to 140 ng/mL), with limits of detection of ∼300 pM and ∼350 pM, respectively for ( n = 3). Colorimetric responses in artificial urine ascertained rapid, sensitive, and selective detection of 8-OHdG at clinically relevant (pM to nM) concentration levels. Furthermore, the proposed methodology enables point-of-care diagnostics for oxidative stress without requiring sophisticated instrumentation.
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Affiliation(s)
- Gopal Ammanath
- Centre for Biomimetic Sensor Science , Nanyang Technological University , Singapore 637553
- Nanyang Institute of Technology in Health and Medicine, Interdisciplinary Graduate School , Nanyang Technological University , Singapore 637553
- School of Materials Science and Engineering , Nanyang Technological University , Singapore 639798
| | - Umit Hakan Yildiz
- Department of Chemistry , Izmir Institute of Technology , Urla, 35430 Izmir , Turkey
| | - Alagappan Palaniappan
- Centre for Biomimetic Sensor Science , Nanyang Technological University , Singapore 637553
- Nanyang Institute of Technology in Health and Medicine, Interdisciplinary Graduate School , Nanyang Technological University , Singapore 637553
| | - Bo Liedberg
- Centre for Biomimetic Sensor Science , Nanyang Technological University , Singapore 637553
- Nanyang Institute of Technology in Health and Medicine, Interdisciplinary Graduate School , Nanyang Technological University , Singapore 637553
- School of Materials Science and Engineering , Nanyang Technological University , Singapore 639798
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14
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Zhu YF, Wang YS, Zhou B, Huang YQ, Li XJ, Chen SH, Wang XF, Tang X. Ultrasensitive detection of Ag(I) based on the conformational switching of a multifunctional aptamer probe induced by silver(I). SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 189:190-194. [PMID: 28820971 DOI: 10.1016/j.saa.2017.08.022] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2017] [Revised: 08/05/2017] [Accepted: 08/09/2017] [Indexed: 06/07/2023]
Abstract
We for the first time confirmed that the low concentrations of Ag(I) could induce a silver specific aptamer probe (SAP) from a random coil sequence form to G-quadruplex structure. Thereby, a novel highly sensitive fluorescence strategy for silver(I) assay was established. The designed multifunctional SAP could act as a recognition element for Ag(I) and a signal reporter. The use of such a SAP can ultrasensitively and selectively detect Ag(I), giving a detection limit down to 0.64nM. This is much lower than those reported by related literatures. This strategy has been applied successfully for the detection of Ag(I) in real samples, further proving its reliability. Taken together, the designed SAP is not only a useful recognition and signal probe for silver, but also gives a platform to study the interaction of monovalent cations with DNA.
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Affiliation(s)
- Yu-Feng Zhu
- College of Public Health, University of South China, Hengyang 421001, PR China
| | - Yong-Sheng Wang
- College of Public Health, University of South China, Hengyang 421001, PR China.
| | - Bin Zhou
- College of Public Health, University of South China, Hengyang 421001, PR China
| | - Yan-Qin Huang
- College of Public Health, University of South China, Hengyang 421001, PR China
| | - Xue-Jiao Li
- College of Public Health, University of South China, Hengyang 421001, PR China
| | - Si-Han Chen
- College of Public Health, University of South China, Hengyang 421001, PR China
| | - Xiao-Feng Wang
- College of Public Health, University of South China, Hengyang 421001, PR China
| | - Xian Tang
- College of Public Health, University of South China, Hengyang 421001, PR China
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15
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An electrochemical aptasensor for the highly sensitive detection of 8-hydroxy-2'-deoxyguanosine based on the hybridization chain reaction. Talanta 2017; 179:414-419. [PMID: 29310253 DOI: 10.1016/j.talanta.2017.11.036] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Revised: 10/20/2017] [Accepted: 11/16/2017] [Indexed: 12/25/2022]
Abstract
In the present work a highly sensitive and selective aptasensor was developed for the determination of 8-hydroxy-2'-deoxyguanosine (8-OH-dG) based on the hybridization chain reaction (HCR) signal amplification. It was observed that the aptamer of 8-OH-dG could hybridize with the capture DNA immobilized on the gold electrode with a sticky tail left, which initiated the HCR and led to the formation of extended dsDNA structure on the electrode surface. Then the electroactive species ([Ru(NH3)6]3+, RuHex) intercalated into the dsDNA grooves to generate the amplified signal. However, in the presence of 8-OH-dG, the aptamer containing G-rich nucleic acid sequences would be induced to form a G-quadruplex structure, which made it impossible to continue the HCR. So the detection signal will significantly decrease. Under the optimal conditions, the peak current of RuHex was linear with the logarithm of 8-OH-dG concentration in the range from 10pM to 100μM with the detection limit of 2.5pM. By integrating the merits of enzyme-free amplification power of the HCR and the inherent high sensitivity of the electrochemical technique, the prepared aptasensor not only showed high sensitivity for the detection of 8-OH-dG, but also exhibited good selectivity against to the uric acid, an important interferent in the urine sample. Particularly, the aptasensor was applied to detect 8-OH-dG in urine samples with satisfactory results.
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16
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A label-free ultrasensitive assay of 8-hydroxy-2′-deoxyguanosine in human serum and urine samples via polyaniline deposition and tetrahedral DNA nanostructure. Anal Chim Acta 2016; 946:48-55. [DOI: 10.1016/j.aca.2016.10.022] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Revised: 10/13/2016] [Accepted: 10/16/2016] [Indexed: 12/27/2022]
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17
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Martins GV, Marques AC, Fortunato E, Sales MGF. 8-hydroxy-2'-deoxyguanosine (8-OHdG) biomarker detection down to picoMolar level on a plastic antibody film. Biosens Bioelectron 2016; 86:225-234. [PMID: 27376193 DOI: 10.1016/j.bios.2016.06.052] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2016] [Revised: 06/01/2016] [Accepted: 06/18/2016] [Indexed: 01/12/2023]
Abstract
An innovative biosensor assembly relying on a simple and straightforward in-situ construction is presented to monitor urinary 8-hydroxy-2'-deoxyguanosine (8-OHdG) down to the pmol/L level. The sensing film of the biosensor consisted of a molecularly imprinted polymer (MIP) layer for 8-OHdG assembled on a gold electrode through electropolymerization of monomer combined with the template. The analytical features of the resulting biosensor were assessed by Cyclic Voltammetry (CV) and Electrochemical Impedance Spectroscopy (EIS). Some experimental parameters such as the initial concentration of the monomer and the ratio template-monomer were investigated and optimized in order to finely tune the performance of the MIP-based sensor. Under optimal conditions, the developed biosensor was able to rebind 8-OHdG with a linear response against EIS from 0.1 to 100pg/ml 3.5-3500 pM. The interference of coexisting species was tested, also with calibrations on urine samples, and good selectivity towards 8-OHdG was obtained. RAMAN spectroscopy, FTIR and SEM evaluations of the prepared films confirmed the formation of a polyphenol thin-film on the electrode surface. The presence and distribution of the imprinted cavities on the MIP layer was confirmed by confocal microscopy imaging of the film, after a post-treatment with Fluorescein Isothiocyanate (FITC) labeled 8-OHdG antibody. Overall, this label-free biosensor for urinary 8-OHdG detection constitutes a promising low-cost alternative to the conventional immunoassay approaches, due to its simplicity, stability, high sensitivity and selectivity for biological sample assays, opening new doors for other applications.
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Affiliation(s)
- Gabriela V Martins
- BioMark/CINTESIS-ISEP, School of Engineering of the Polytechnique School of Porto, 4200-072 Porto, Portugal; i3N/CENIMAT, Department of Materials Science, Faculty of Sciences and Technology, Universidade NOVA de Lisboa and CEMOP/UNINOVA, Campus de Caparica, 2829-516 Caparica, Portugal
| | - Ana C Marques
- i3N/CENIMAT, Department of Materials Science, Faculty of Sciences and Technology, Universidade NOVA de Lisboa and CEMOP/UNINOVA, Campus de Caparica, 2829-516 Caparica, Portugal
| | - Elvira Fortunato
- i3N/CENIMAT, Department of Materials Science, Faculty of Sciences and Technology, Universidade NOVA de Lisboa and CEMOP/UNINOVA, Campus de Caparica, 2829-516 Caparica, Portugal
| | - M Goreti F Sales
- BioMark/CINTESIS-ISEP, School of Engineering of the Polytechnique School of Porto, 4200-072 Porto, Portugal.
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18
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Liu Y, Wei M, Zhang L, Zhang Y, Wei W, Yin L, Pu Y, Liu S. Chiroplasmonic Assemblies of Gold Nanoparticles for Ultrasensitive Detection of 8-Hydroxy-2'-deoxyguanosine in Human Serum Sample. Anal Chem 2016; 88:6509-14. [PMID: 27218894 DOI: 10.1021/acs.analchem.6b01258] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Gold nanoparticles (AuNPs) have been extensively explored to be used in analytical methods such as electrochemical, colorimetric methods, and so on. However, only a few methods have been reported by using chirality of AuNPs although their chiral assembly has been studied extensively and circular dichroism (CD) spectroscopy is also a simple and sensitive analytical method. In this paper, sensitive CD spectroscopy method has been explored for detection of 8-hydroxy-2'-deoxyguanosine (8-OHdG), a well-known biomarker for oxidative DNA damage, based on DNA-induced chiroplasmonic assemblies of AuNPs. First, 8-OHdG aptamer hybridized with its complementary sequence that modified with AuNPs based on precision matched bases. DNA-modified AuNPs were assembled into AuNPs dimers by 8-OHdG aptamer, which displayed strong chiroptical activity. Subsequently, in the presence of 8-OHdG, the high specific recognition and affinity constants of aptamer and 8-OHdG destroyed the hybrid of aptamer and its complementary sequence; as a result, AuNPs dimers were destroyed and showed low CD signal. The CD intensity was in log-linear correlation with the concentration of 8-OHdG ranging from 0.05 to 2 nM, with a correlation coefficient of 0.9951 and a detection limit of 33 pM (S/N = 3). The method has been successfully applied in a complex matrix such as human serum samples. The recoveries were from 92.5% to 107% and the relative standard derivations were in the range of 4.89% ∼ 7.27%, indicating that the method had good accuracy and high precision. Therefore, these results indicated that the proposed CD method was simple and reliable, which held great potential for clinical examinations.
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Affiliation(s)
- Yuanjian Liu
- Laboratory of Environmental Medicine Engineering, Ministry of Education, Jiangsu Province Hi-Tech Key Laboratory for Bio-medical Research, School of Chemistry and Chemical Engineering, Southeast University , Nanjing, 211189, China
| | - Min Wei
- College of Food Science and Technology, Henan University of Technology , Zhengzhou, 450001, China
| | - Linqun Zhang
- Laboratory of Environmental Medicine Engineering, Ministry of Education, Jiangsu Province Hi-Tech Key Laboratory for Bio-medical Research, School of Chemistry and Chemical Engineering, Southeast University , Nanjing, 211189, China
| | - Yuanjian Zhang
- Laboratory of Environmental Medicine Engineering, Ministry of Education, Jiangsu Province Hi-Tech Key Laboratory for Bio-medical Research, School of Chemistry and Chemical Engineering, Southeast University , Nanjing, 211189, China
| | - Wei Wei
- Laboratory of Environmental Medicine Engineering, Ministry of Education, Jiangsu Province Hi-Tech Key Laboratory for Bio-medical Research, School of Chemistry and Chemical Engineering, Southeast University , Nanjing, 211189, China
| | - Lihong Yin
- Laboratory of Environmental Medicine Engineering, Ministry of Education, Jiangsu Province Hi-Tech Key Laboratory for Bio-medical Research, School of Chemistry and Chemical Engineering, Southeast University , Nanjing, 211189, China
| | - Yuepu Pu
- Laboratory of Environmental Medicine Engineering, Ministry of Education, Jiangsu Province Hi-Tech Key Laboratory for Bio-medical Research, School of Chemistry and Chemical Engineering, Southeast University , Nanjing, 211189, China
| | - Songqin Liu
- Laboratory of Environmental Medicine Engineering, Ministry of Education, Jiangsu Province Hi-Tech Key Laboratory for Bio-medical Research, School of Chemistry and Chemical Engineering, Southeast University , Nanjing, 211189, China
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Gutiérrez A, Gutierrez FA, Eguílaz M, González-Domínguez JM, Hernández-Ferrer J, Ansón-Casaos A, Martínez MT, Rivas GA. Electrochemical sensing of guanine, adenine and 8-hydroxy-2′-deoxyguanosine at glassy carbon modified with single-walled carbon nanotubes covalently functionalized with lysine. RSC Adv 2016. [DOI: 10.1039/c5ra22556f] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Synthesis and characterization of l-lysine covalently functionalized SWCNT and analytical application for the highly sensitive quantification of guanine, adenine and 8-hydroxy-2′-deoxyguanosine.
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Affiliation(s)
- Alejandro Gutiérrez
- INFIQC
- Departamento de Físico Química
- Facultad de Ciencias Químicas
- Universidad Nacional de Córdoba
- Ciudad Universitaria
| | - Fabiana A. Gutierrez
- INFIQC
- Departamento de Físico Química
- Facultad de Ciencias Químicas
- Universidad Nacional de Córdoba
- Ciudad Universitaria
| | - Marcos Eguílaz
- INFIQC
- Departamento de Físico Química
- Facultad de Ciencias Químicas
- Universidad Nacional de Córdoba
- Ciudad Universitaria
| | | | | | | | | | - Gustavo A. Rivas
- INFIQC
- Departamento de Físico Química
- Facultad de Ciencias Químicas
- Universidad Nacional de Córdoba
- Ciudad Universitaria
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A label-free electrochemical aptasensor for 8-hydroxy-2′-deoxyguanosine detection. J Electroanal Chem (Lausanne) 2015. [DOI: 10.1016/j.jelechem.2015.10.040] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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21
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Li S, Liao L, Wu R, Yang Y, Xu L, Xiao X, Nie C. Resonance light scattering detection of fructose bisphosphates using uranyl-salophen complex-modified gold nanoparticles as optical probe. Anal Bioanal Chem 2015; 407:8911-8. [PMID: 26403237 DOI: 10.1007/s00216-015-9050-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2015] [Revised: 08/30/2015] [Accepted: 09/15/2015] [Indexed: 11/25/2022]
Abstract
In this paper, we report a resonance light scattering (RLS) method for the determination of fructose bisphosphates (FBPs) in water solution using fructose 1,6-bisphosphate (F-1,6-BP) as a model analyte without the procedure of extracting target analyte. The method used a type of modified gold nanoparticles (GNPs) as optical probe. The modified GNPs are uranyl-salophen-cysteamine-GNPs (U-Sal-Cy-GNPs) which are obtained through the acylation reaction of carboxylated salophen with cysteamine-capped GNPs (Cy-GNPs) to form Sal-Cy-GNPs and then the chelation reaction of uranyl with tetradentate ligand salophen in the Sal-Cy-GNPs. A FBP molecule is used easily to connect two U-Sal-Cy-GNPs to cause the aggregation of the GNPs by utilizing the specific affinity of uranyl-salophen complex to phosphate group, resulting in the production of strong RLS signal from the system. The amount of FBPs can be determined through detecting the RLS intensity change of the system. A linear range was found to be 2.5 to 75 nmol/L with a detection limit of 0.91 nmol/L under optimal conditions. The method has been successfully used to determine FBPs in real samples with the recoveries of 96.5-103.5 %.
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Affiliation(s)
- Shijun Li
- College of Chemistry and Chemical Engineering, University of South China, Hengyang, Hunan, 421001, China
| | - Lifu Liao
- College of Chemistry and Chemical Engineering, University of South China, Hengyang, Hunan, 421001, China.
| | - Rurong Wu
- College of Chemistry and Chemical Engineering, University of South China, Hengyang, Hunan, 421001, China
| | - Yanyan Yang
- College of Chemistry and Chemical Engineering, University of South China, Hengyang, Hunan, 421001, China
| | - Li Xu
- College of Chemistry and Chemical Engineering, University of South China, Hengyang, Hunan, 421001, China
| | - Xilin Xiao
- College of Chemistry and Chemical Engineering, University of South China, Hengyang, Hunan, 421001, China
| | - Changming Nie
- College of Chemistry and Chemical Engineering, University of South China, Hengyang, Hunan, 421001, China
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22
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Guo Y, Yao W, Xie Y, Zhou X, Hu J, Pei R. Logic gates based on G-quadruplexes: principles and sensor applications. Mikrochim Acta 2015. [DOI: 10.1007/s00604-015-1633-2] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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23
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A novel strategy for dual-channel detection of metallothioneins and mercury based on the conformational switching of functional chimera aptamer. J Pharm Biomed Anal 2015; 107:258-64. [DOI: 10.1016/j.jpba.2015.01.011] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2014] [Revised: 12/20/2014] [Accepted: 01/06/2015] [Indexed: 02/02/2023]
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