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Imran H, Manikandan PN, Dharuman V. Ultra-sensitive and selective label free electrochemical DNA detection at layer-by-layer self-assembled graphene oxide and vesicle liposome nano-architecture. J Electroanal Chem (Lausanne) 2019. [DOI: 10.1016/j.jelechem.2019.01.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Hernández LA, Del Valle MA, Armijo F. Electrosynthesis and characterization of nanostructured polyquinone for use in detection and quantification of naturally occurring dsDNA. Biosens Bioelectron 2016; 79:280-7. [PMID: 26710345 DOI: 10.1016/j.bios.2015.12.041] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2015] [Revised: 12/10/2015] [Accepted: 12/15/2015] [Indexed: 11/28/2022]
Abstract
The detection of naturally occurring desoxyribonucleic acid (DNA) has become a subject of study by the projections that would generate to be able to sense the genetic material for the detection of future diseases. Bearing this in mind, to provide new measuring strategies, in the current work the preparation of a low-cost electrode, modified with poly(1-amino-9,10-anthraquinone) nanowires using a SiO2 template, is carried out; the assembly is next modified by covalently attaching ssDNA strands. It must be noted that all this is accomplished by using solely electrochemical techniques, according to methodology developed for this purpose. SEM images of the modified surface show high order and homogeneity in the distribution of modified nanowires over the electrode surface. In turn, after the hybridization with its complementary strand, the voltammetric responses enable corroborating the linear relationship between hybridization at different DNA concentrations and normalized current response, obtaining a limit of detection (LOD) 5.7·10(-12)gL(-1) and limit of quantification (LOQ) 1.9·10(-11)gL(-1). The working dynamic range is between 1.4·10(-7) and 8.5·10(-9)gL(-1) with a correlation coefficient 0.9998. The successful obtaining of the modified electrode allows concluding that the high order reached by the nanostructures, guides the subsequent single strand of DNA (ssDNA) covalent attachment, which after hybridization with its complementary strand brings about a considerable current increase. This result allows foreseeing a guaranteed breakthrough with regard to the use of the biosensor in real samples.
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Affiliation(s)
- Loreto A Hernández
- Pontificia Universidad Católica de Chile, Facultad de Química, Departamento de Química Inorgánica, Laboratorio de Electroquímica de Polímeros (LEP), Vicuña Mackenna 4860, 7820436 Macul, Santiago, Chile
| | - María A Del Valle
- Pontificia Universidad Católica de Chile, Facultad de Química, Departamento de Química Inorgánica, Laboratorio de Electroquímica de Polímeros (LEP), Vicuña Mackenna 4860, 7820436 Macul, Santiago, Chile.
| | - Francisco Armijo
- Pontificia Universidad Católica de Chile, Facultad de Química, Departamento de Química Inorgánica, Laboratorio de Electroquímica de Polímeros (LEP), Vicuña Mackenna 4860, 7820436 Macul, Santiago, Chile
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Heli H, Sattarahmady N, Hatam GR, Reisi F, Vais RD. An electrochemical genosensor for Leishmania major detection based on dual effect of immobilization and electrocatalysis of cobalt-zinc ferrite quantum dots. Talanta 2016; 156-157:172-179. [PMID: 27260450 DOI: 10.1016/j.talanta.2016.04.065] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2016] [Revised: 04/27/2016] [Accepted: 04/28/2016] [Indexed: 01/14/2023]
Abstract
Identification of Leishmania parasites is important in diagnosis and clinical studies of leishmaniasis. Although epidemiological and clinical methods are available, they are not sufficient for identification of causative agents of leishmaniasis. In the present study, quantum dots of magnetic cobalt-zinc ferrite (Co0.5Zn0.5Fe2O4) were synthesized and characterized by physicochemical methods. The quantum dots were then employed as an electrode modifier to immobilize a 24-mer specific single stranded DNA probe, and fabrication of a label-free, PCR-free and signal-on electrochemical genosensor for the detection of Leishmania major. Hybridization of the complementary single stranded DNA sequence with the probe under the selected conditions was explored using methylene blue as a redox marker, utilizing the electrocatalytic effect of the quantum dots on the methylene blue electroreduction process. The genosensor could detect a synthetic single stranded DNA target in a range of 1.0×10(-11) to 1.0×10(-18)molL(-1) with a limit of detection of 2.0×10(-19)molL(-1), and genomic DNA in a range of 7.31×10(-14) to 7.31×10(-6)ngμL(-1) with a limit of detection of 1.80×10(-14)ngμL(-1) with a high selectivity and sensitivity.
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Affiliation(s)
- H Heli
- Nanomedicine and Nanobiology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran.
| | - N Sattarahmady
- Nanomedicine and Nanobiology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran; Department of Medical Physics, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - G R Hatam
- Department of Parasitology and Mycology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran; Basic Sciences in Infectious Diseases Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - F Reisi
- Nanomedicine and Nanobiology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran; Department of Nanomedicine, School of Advanced Medical Sciences and Technologies, Shiraz University of Medical Sciences, Shiraz, Iran
| | - R Dehdari Vais
- Nanomedicine and Nanobiology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
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Zhang S, Wang K, Huang C, Sun T. Reconfigurable and resettable arithmetic logic units based on magnetic beads and DNA. NANOSCALE 2015; 7:20749-20756. [PMID: 26602962 DOI: 10.1039/c5nr06733b] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Based on the characteristics of magnetic beads and DNA, a simple and universal platform was developed for the integration of multiple logic gates to achieve resettable half adder and half subtractor functions. The signal reporter was composed of a split G-quadruplex DNAzyme and AuNP-surface immobilized molecular beacon molecule. The novel feature of the designed system is that the inputs (split G-quadruplexes) can interact with hairpin-modified Au NPs linked to magnetic particles. Another novel feature is that the logic operations can be reset by heating the output system and by using the magnetic separation of the computing modules. Moreover, the developed half adder and half subtractor are realized on a simple DNA/magnetic bead platform in an enzyme-free system and share a constant threshold setpoint. Due to the diversity and design flexibility of DNA, these investigations may provide a new method for the development of resettable DNA-based arithmetic operations.
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Affiliation(s)
- Siqi Zhang
- College of Sciences, Northeastern University, Shenyang, 110819, China.
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Chang K, Chen R, Wang S, Li J, Hu X, Liang H, Cao B, Sun X, Ma L, Zhu J, Jiang M, Hu J. Considerations on Circuit Design and Data Acquisition of a Portable Surface Plasmon Resonance Biosensing System. SENSORS 2015; 15:20511-23. [PMID: 26295398 PMCID: PMC4570433 DOI: 10.3390/s150820511] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/15/2015] [Revised: 08/06/2015] [Accepted: 08/07/2015] [Indexed: 11/16/2022]
Abstract
The aim of this study was to develop a circuit for an inexpensive portable biosensing system based on surface plasmon resonance spectroscopy. This portable biosensing system designed for field use is characterized by a special structure which consists of a microfluidic cell incorporating a right angle prism functionalized with a biomolecular identification membrane, a laser line generator and a data acquisition circuit board. The data structure, data memory capacity and a line charge-coupled device (CCD) array with a driving circuit for collecting the photoelectric signals are intensively focused on and the high performance analog-to-digital (A/D) converter is comprehensively evaluated. The interface circuit and the photoelectric signal amplifier circuit are first studied to obtain the weak signals from the line CCD array in this experiment. Quantitative measurements for validating the sensitivity of the biosensing system were implemented using ethanol solutions of various concentrations indicated by volume fractions of 5%, 8%, 15%, 20%, 25%, and 30%, respectively, without a biomembrane immobilized on the surface of the SPR sensor. The experiments demonstrated that it is possible to detect a change in the refractive index of an ethanol solution with a sensitivity of 4.99838 × 105 ΔRU/RI in terms of the changes in delta response unit with refractive index using this SPR biosensing system, whereby the theoretical limit of detection of 3.3537 × 10−5 refractive index unit (RIU) and a high linearity at the correlation coefficient of 0.98065. The results obtained from a series of tests confirmed the practicality of this cost-effective portable SPR biosensing system.
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Affiliation(s)
- Keke Chang
- Department of Electrical Engineering, Henan Agricultural University, Zhengzhou 450002, China.
| | - Ruipeng Chen
- Department of Electrical Engineering, Henan Agricultural University, Zhengzhou 450002, China.
| | - Shun Wang
- Department of Electrical Engineering, Henan Agricultural University, Zhengzhou 450002, China.
| | - Jianwei Li
- Department of Electrical Engineering, Henan Agricultural University, Zhengzhou 450002, China.
| | - Xinran Hu
- School of Human Nutrition and Dietetics, McGill University, Ste Anne de Bellevue, QC H9X 3V9, Canada.
| | - Hao Liang
- Department of Electronic and Telecommunications, University of Gävle, Gävle SE-801 76, Sweden.
| | - Baiqiong Cao
- Department of Electrical Engineering, Henan Agricultural University, Zhengzhou 450002, China.
| | - Xiaohui Sun
- Department of Electrical Engineering, Henan Agricultural University, Zhengzhou 450002, China.
| | - Liuzheng Ma
- Department of Electrical Engineering, Henan Agricultural University, Zhengzhou 450002, China.
| | - Juanhua Zhu
- Department of Electrical Engineering, Henan Agricultural University, Zhengzhou 450002, China.
| | - Min Jiang
- College of life sciences, Henan Agricultural University, Zhengzhou 450002, China.
| | - Jiandong Hu
- Department of Electrical Engineering, Henan Agricultural University, Zhengzhou 450002, China.
- State key laboratory of wheat and maize crop science, Zhengzhou 450002, China.
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