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Fan J, Gong H, Wang F, Wang L, Yu Y, Liu D, Yang W. Multiplexed electrochemical nucleic acid sensor based on visible light-mediated metal-free thiol-yne click reaction for simultaneous detection of different nucleic acid targets. Talanta 2024; 273:125856. [PMID: 38442565 DOI: 10.1016/j.talanta.2024.125856] [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: 10/13/2023] [Revised: 12/26/2023] [Accepted: 02/28/2024] [Indexed: 03/07/2024]
Abstract
Simultaneous detection of multiple tumor biomarkers with a simple and low-cost assay is crucial for early cancer detection and diagnosis. Herein, we presented a low-cost and simple assay for multiplexed detection of tumor biomarkers using a spatially separated electrodes strategy. The sensor is fabricated based on a metal-free thiol-yne click reaction, which is mediated by visible light, on commercially available indium tin oxide (ITO) electrodes. Four biomarkers, including p53 DNA, Brca2 DNA, K-ras DNA, and MicroRNA-204 RNA, were used as model analytes, and the corresponding oligonucleotide probes were modified on the desired electrode units sequentially with 530 nm irradiation light in the presence of photosensitizer Eosin Y. By this visible light-mediated coupling reaction, oligonucleotide probe densities of up to 9.2 ± 0.7 × 1010 molecules/cm2 were readily obtained on the ITO electrode surface. The proposed multiplexed E-NA sensor could detect four different nucleic acid targets concurrently without crosstalk among adjacent electrodes and was also successfully applied for detecting targets in a 20% fetal calf serum sample. The detection limits for p53 DNA, Brca2 DNA, K-ras DNA, and MicroRNA-204 RNA were 0.72 nM, 0.97 nM, 2.15 nM, and 1.73 nM, respectively. The developed approach not only has a great potential for developing cost-effective biosensors on affordable substrates for nucleic acid target detection, but also be easily extended to detect other targets by modifying the specific oligonucleotide probes anchored on the electrode.
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Affiliation(s)
- Jinlong Fan
- School of Material Science and Chemical Engineering, Harbin University of Science and Technology, Harbin 150040, China; MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150001, China
| | - Hanlin Gong
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150001, China
| | - Fan Wang
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150001, China
| | - Li Wang
- Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, College of Veterinary Medicine, Northeast Agricultural University, Harbin, Heilongjiang 150001, China
| | - Yongsheng Yu
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150001, China
| | - Danqing Liu
- School of Material Science and Chemical Engineering, Harbin University of Science and Technology, Harbin 150040, China.
| | - Weiwei Yang
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150001, China.
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2
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Zezza P, Lucío MI, Fernández E, Maquieira Á, Bañuls MJ. Surface Micro-Patterned Biofunctionalized Hydrogel for Direct Nucleic Acid Hybridization Detection. BIOSENSORS 2023; 13:312. [PMID: 36979524 PMCID: PMC10046352 DOI: 10.3390/bios13030312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 02/21/2023] [Accepted: 02/21/2023] [Indexed: 06/18/2023]
Abstract
The present research is focused on the development of a biofunctionalized hydrogel with a surface diffractive micropattern as a label-free biosensing platform. The biosensors described in this paper were fabricated with a holographic recording of polyethylene terephthalate (PET) surface micro-structures, which were then transferred into a hydrogel material. Acrylamide-based hydrogels were obtained with free radical polymerization, and propargyl acrylate was added as a comonomer, which allowed for covalent immobilization of thiolated oligonucleotide probes into the hydrogel network, via thiol-yne photoclick chemistry. The comonomer was shown to significantly contribute to the immobilization of the probes based on fluorescence imaging. Two different immobilization approaches were demonstrated: during or after hydrogel synthesis. The second approach showed better loading capacity of the bioreceptor groups. Diffraction efficiency measurements of hydrogel gratings at 532 nm showed a selective response reaching a limit of detection in the complementary DNA strand of 2.47 µM. The label-free biosensor as designed could significantly contribute to direct and accurate analysis in medical diagnosis as it is cheap, easy to fabricate, and works without the need for further reagents.
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Affiliation(s)
- Paola Zezza
- Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Universitat Politécnica de Valéncia, Universitat de Valéncia, Camino de Vera s/n, 46022 Valencia, Spain
| | - María Isabel Lucío
- Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Universitat Politécnica de Valéncia, Universitat de Valéncia, Camino de Vera s/n, 46022 Valencia, Spain
| | - Estrella Fernández
- Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Universitat Politécnica de Valéncia, Universitat de Valéncia, Camino de Vera s/n, 46022 Valencia, Spain
| | - Ángel Maquieira
- Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Universitat Politécnica de Valéncia, Universitat de Valéncia, Camino de Vera s/n, 46022 Valencia, Spain
- Departamento de Química, Universitat Politécnica de Valéncia, Camino de Vera s/n, 46022 Valencia, Spain
| | - María-José Bañuls
- Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Universitat Politécnica de Valéncia, Universitat de Valéncia, Camino de Vera s/n, 46022 Valencia, Spain
- Departamento de Química, Universitat Politécnica de Valéncia, Camino de Vera s/n, 46022 Valencia, Spain
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3
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Juste-Dolz A, Fernández E, Puchades R, Avella-Oliver M, Maquieira Á. Patterned Biolayers of Protein Antigens for Label-Free Biosensing in Cow Milk Allergy. BIOSENSORS 2023; 13:214. [PMID: 36831980 PMCID: PMC9953870 DOI: 10.3390/bios13020214] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Revised: 01/29/2023] [Accepted: 01/30/2023] [Indexed: 06/18/2023]
Abstract
This paper focuses on creating one-dimensional diffractive grooved structures of antigen proteins on glass substrates for the label-free detection of antibodies to dairy allergens. In particular, the fabrication of protein structures is carried out by combining microcontact printing with physisorption, imines coupling, and thiol-ene click chemistry. The work first sets up these patterning methods and discusses and compares the main aspects involved in them (structure, biolayer thickness, functionality, stability). Homogeneous periodic submicron structures of proteins are created and characterized by diffractive measurements, AFM, FESEM, and fluorescence scanning. Then, this patterning method is applied to proteins involved in cow milk allergy, and the resulting structures are implemented as optical transducers to sense specific immunoglobulins G. In particular, gratings of bovine serum albumin, casein, and β-lactoglobulin are created and assessed, reaching limits of detection in the range of 30-45 ng·mL-1 of unlabeled antibodies by diffractive biosensing.
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Affiliation(s)
- Augusto Juste-Dolz
- Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Universitat Politècnica de València, Universitat de València, 46022 Valencia, Spain
| | - Estrella Fernández
- Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Universitat Politècnica de València, Universitat de València, 46022 Valencia, Spain
| | - Rosa Puchades
- Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Universitat Politècnica de València, Universitat de València, 46022 Valencia, Spain
- Departamento de Química, Universitat Politècnica de València, 46022 Valencia, Spain
| | - Miquel Avella-Oliver
- Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Universitat Politècnica de València, Universitat de València, 46022 Valencia, Spain
- Departamento de Química, Universitat Politècnica de València, 46022 Valencia, Spain
| | - Ángel Maquieira
- Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Universitat Politècnica de València, Universitat de València, 46022 Valencia, Spain
- Departamento de Química, Universitat Politècnica de València, 46022 Valencia, Spain
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4
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Bryche JF, Vega M, Tempez A, Brulé T, Carlier T, Moreau J, Chaigneau M, Charette PG, Canva M. Spatially-Localized Functionalization on Nanostructured Surfaces for Enhanced Plasmonic Sensing Efficacy. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:3586. [PMID: 36296775 PMCID: PMC9609756 DOI: 10.3390/nano12203586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Revised: 10/07/2022] [Accepted: 10/10/2022] [Indexed: 06/16/2023]
Abstract
This work demonstrates the enhancement in plasmonic sensing efficacy resulting from spatially-localized functionalization on nanostructured surfaces, whereby probe molecules are concentrated in areas of high field concentration. Comparison between SERS measurements on nanostructured surfaces (arrays of nanodisks 110 and 220 nm in diameter) with homogeneous and spatially-localized functionalization with thiophenol demonstrates that the Raman signal originates mainly from areas with high field concentration. TERS measurements with 10 nm spatial resolution confirm the field distribution profiles predicted by the numerical modeling. Though this enhancement in plasmonic sensing efficacy is demonstrated with SERS, results apply equally well to any type of optical/plasmonic sensing on functionalized surfaces with nanostructuring.
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Affiliation(s)
- Jean-François Bryche
- Laboratoire Nanotechnologies Nanosystèmes (LN2-IRL 3463)-CNRS, Université de Sherbrooke, 3000 Boulevard de l’Université, Sherbrooke, QC J1K OA5, Canada
- Institut Interdisciplinaire d’Innovation Technologique (3IT), 3000 Boulevard de l’Université, Sherbrooke, QC J1K OA5, Canada
| | - Marlo Vega
- Laboratoire Nanotechnologies Nanosystèmes (LN2-IRL 3463)-CNRS, Université de Sherbrooke, 3000 Boulevard de l’Université, Sherbrooke, QC J1K OA5, Canada
- Institut Interdisciplinaire d’Innovation Technologique (3IT), 3000 Boulevard de l’Université, Sherbrooke, QC J1K OA5, Canada
- Laboratoire Charles Fabry—Institut d’Optique Graduate School, Université Paris-Saclay, CNRS, 91120 Palaiseau, France
| | | | | | | | - Julien Moreau
- Laboratoire Charles Fabry—Institut d’Optique Graduate School, Université Paris-Saclay, CNRS, 91120 Palaiseau, France
| | | | - Paul G. Charette
- Laboratoire Nanotechnologies Nanosystèmes (LN2-IRL 3463)-CNRS, Université de Sherbrooke, 3000 Boulevard de l’Université, Sherbrooke, QC J1K OA5, Canada
- Institut Interdisciplinaire d’Innovation Technologique (3IT), 3000 Boulevard de l’Université, Sherbrooke, QC J1K OA5, Canada
| | - Michael Canva
- Laboratoire Nanotechnologies Nanosystèmes (LN2-IRL 3463)-CNRS, Université de Sherbrooke, 3000 Boulevard de l’Université, Sherbrooke, QC J1K OA5, Canada
- Institut Interdisciplinaire d’Innovation Technologique (3IT), 3000 Boulevard de l’Université, Sherbrooke, QC J1K OA5, Canada
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5
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Novel bioorthogonal reaction-mediated particle counting sensing platform using phage for rapid detection of Salmonella. Anal Chim Acta 2022; 1236:340564. [DOI: 10.1016/j.aca.2022.340564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Revised: 10/18/2022] [Accepted: 10/27/2022] [Indexed: 11/21/2022]
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6
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Singhal J, Verma S, Kumar S, Mehrotra D. Recent Advances in Nano-Bio-Sensing Fabrication Technology for the Detection of Oral Cancer. Mol Biotechnol 2021; 63:339-362. [PMID: 33638110 DOI: 10.1007/s12033-021-00306-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/06/2021] [Indexed: 12/24/2022]
Abstract
Nanotechnology-based miniaturized devices have been a breakthrough in the pre-clinical and clinical research areas, e.g. drug delivery, personalized medicine. They have revolutionized the discovery and development of biomarker-based diagnostic devices for detection of various diseases such as tuberculosis, malaria and cancer. Nanomaterials (NMs) hold tremendous diagnostic potential due to their high surface-to-volume ratio and quantum confinement phenomenon, improving the detection limit of clinically relevant biomolecules in bio-fluids. Thus, they are helpful in the translation of bench-on platform to point-of-care (POC) screening device. The nanomaterial-based biosensor fabrication technology has also simplified and improved oral cancer (OC) or oral squamous cell carcinomas (OSCC) diagnosis. The fabrication of nano-bio sensors involves application specific modifications of NMs. The unique properties functionalized NMs have augmented their application on the nano-biosensing platform for the detection of clinically relevant biomolecules in bio-fluids. Therefore, this article summarizes the recent advancements in the process of fabrication of nano-biosensors for detection of OC.
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Affiliation(s)
- Jaya Singhal
- Department of Health Research - Multidisciplinary Research Unit, King George's Medical University, Lucknow, 226003, Uttar Pradesh, India.,Department of Oral and Maxillofacial Surgery, King George's Medical University, Lucknow, 226003, Uttar Pradesh, India
| | - Saurabh Verma
- Department of Health Research - Multidisciplinary Research Unit, King George's Medical University, Lucknow, 226003, Uttar Pradesh, India
| | - Sumit Kumar
- Department of Health Research - Multidisciplinary Research Unit, King George's Medical University, Lucknow, 226003, Uttar Pradesh, India.
| | - Divya Mehrotra
- Department of Health Research - Multidisciplinary Research Unit, King George's Medical University, Lucknow, 226003, Uttar Pradesh, India. .,Department of Oral and Maxillofacial Surgery, King George's Medical University, Lucknow, 226003, Uttar Pradesh, India.
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7
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Bunton CM, Bassampour ZM, Boothby JM, Smith AN, Rose JV, Nguyen DM, Ware TH, Csaky KG, Lippert AR, Tsarevsky NV, Son DY. Degradable Silyl Ether–Containing Networks from Trifunctional Thiols and Acrylates. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c01967] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Caleb M. Bunton
- Department of Chemistry, Center for Drug Discovery, Design and Delivery (CD4), Southern Methodist University, Dallas, Texas 75205, United States
| | - Zahra M. Bassampour
- Department of Chemistry, Center for Drug Discovery, Design and Delivery (CD4), Southern Methodist University, Dallas, Texas 75205, United States
| | - Jennifer M. Boothby
- Department of Bioengineering, The University of Texas at Dallas, Richardson, Texas 75080, United States
| | - Ashanti N. Smith
- Department of Chemistry, Center for Drug Discovery, Design and Delivery (CD4), Southern Methodist University, Dallas, Texas 75205, United States
| | - Joseph V. Rose
- Department of Chemistry, Center for Drug Discovery, Design and Delivery (CD4), Southern Methodist University, Dallas, Texas 75205, United States
| | - Daphne M. Nguyen
- Department of Chemistry, Center for Drug Discovery, Design and Delivery (CD4), Southern Methodist University, Dallas, Texas 75205, United States
| | - Taylor H. Ware
- Department of Bioengineering, The University of Texas at Dallas, Richardson, Texas 75080, United States
| | - Karl G. Csaky
- Retina Foundation of the Southwest, Dallas, Texas 75231, United States
| | - Alexander R. Lippert
- Department of Chemistry, Center for Drug Discovery, Design and Delivery (CD4), Southern Methodist University, Dallas, Texas 75205, United States
| | - Nicolay V. Tsarevsky
- Department of Chemistry, Center for Drug Discovery, Design and Delivery (CD4), Southern Methodist University, Dallas, Texas 75205, United States
| | - David Y. Son
- Department of Chemistry, Center for Drug Discovery, Design and Delivery (CD4), Southern Methodist University, Dallas, Texas 75205, United States
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8
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Xiang W, Zhang Z, Weng W, Wu B, Cheng J, Shi L, Sun H, Gao L, Shi K. Highly sensitive detection of carcinoembryonic antigen using copper-free click chemistry on the surface of azide cofunctionalized graphene oxide. Anal Chim Acta 2020; 1127:156-162. [PMID: 32800119 DOI: 10.1016/j.aca.2020.06.053] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 06/19/2020] [Accepted: 06/22/2020] [Indexed: 12/31/2022]
Abstract
In this study, we reported a highly sensitive method for detecting carcinoembryonic antigen (CEA) based on an azide cofunctionalized graphene oxide (GO-N3) and carbon dot (CDs) biosensor system. Carbon dots-labeled DNA (CDs-DNA) combined with GO-N3 using copper-free click chemistry (CFCC), which quenched the fluorescence of the CDs via fluorescence resonance energy transfer (FRET). Upon the addition of CEA, fluorescence was recovered due to the combination of CEA and aptamer. Under optimal conditions, the relative fluorescence intensity was linear with CEA concentration in the range of 0.01-1 ng/mL (R2 = 0.9788), and the limit of detection (LOD) was 7.32 pg/mL (S/N = 3). This biosensor had a high sensitivity and good selectivity for CEA detection in serum samples, indicating that the novel sensor platform holds a great potential for CEA and other biomarkers in practical applications.
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Affiliation(s)
- Wenwen Xiang
- Precision Medical Center Laboratory, The First Affiliated Hospital, Wenzhou Medical University, Wenzhou, 325015, China
| | - Zhongjing Zhang
- Precision Medical Center Laboratory, The First Affiliated Hospital, Wenzhou Medical University, Wenzhou, 325015, China
| | - Wanqing Weng
- Precision Medical Center Laboratory, The First Affiliated Hospital, Wenzhou Medical University, Wenzhou, 325015, China
| | - Boda Wu
- Precision Medical Center Laboratory, The First Affiliated Hospital, Wenzhou Medical University, Wenzhou, 325015, China
| | - Jia Cheng
- Precision Medical Center Laboratory, The First Affiliated Hospital, Wenzhou Medical University, Wenzhou, 325015, China
| | - Liang Shi
- Precision Medical Center Laboratory, The First Affiliated Hospital, Wenzhou Medical University, Wenzhou, 325015, China
| | - Hongwei Sun
- Precision Medical Center Laboratory, The First Affiliated Hospital, Wenzhou Medical University, Wenzhou, 325015, China
| | - Li Gao
- Precision Medical Center Laboratory, The First Affiliated Hospital, Wenzhou Medical University, Wenzhou, 325015, China.
| | - Keqing Shi
- Precision Medical Center Laboratory, The First Affiliated Hospital, Wenzhou Medical University, Wenzhou, 325015, China
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An ultrasensitive biosensor for fast detection of Salmonella using 3D magnetic grid separation and urease catalysis. Biosens Bioelectron 2020; 157:112160. [PMID: 32250940 DOI: 10.1016/j.bios.2020.112160] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2019] [Revised: 02/05/2020] [Accepted: 03/17/2020] [Indexed: 12/16/2022]
Abstract
Screening of pathogenic bacteria plays a crucial role in preventing foodborne disease outbreaks. In this study, an ultrasensitive biosensor was developed for fast detection of Salmonella using self-assembled magnetic nanoparticle (MNP) chains for continuous-flow separation of Salmonella from large-volume sample, urease coated gold nanoparticles (GNPs) for specific labelling of Salmonella and efficient amplification of signal, and linear scan voltammetry for sensitive detection of catalysate. First, MNP chains were formed and distributed in a 3D spiral channel using mutually repelling cylindrical magnets and ring iron gears to control anti-Salmonella monoclonal antibody coated MNPs. After bacterial sample was continuous-flow drawn into the channel, bacteria-MNP complexes (magnetic bacteria) were formed on the chains, resulting in specific separation of target bacteria from sample background. Then, anti-Salmonella polyclonal antibodies and urease coated GNPs were drawn to label the magnetic bacteria, resulting in the formation of enzymatic bacteria. After washing to remove residual GNPs, urea was drawn and catalyzed by urease on enzymatic bacteria, resulting in the produce of catalysate (ammonium carbonate). Finally, the catalysate was transferred into a microfluidic chip with a thin-film Ag/AgCl reference electrode array for linear scan voltammetric measurement, and the resistance of catalysate was obtained to determine the amount of target bacteria. This biosensor could quantitatively detect Salmonella from 1.0 × 101 to 1.0 × 106 CFU/mL in 1 h with low detection limit of 101 CFU/mL. The mean recovery for Salmonella in spiked milk was about 104.3%.
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Kelbysheva ES, Gordey YA, Ezernitskaya MG, Smol’yakov AF, Telegina LN. Synthesis of Sulfur-Containing Cymantrene Derivatives Having Potential Photo- and Electrochemical Properties. RUSS J COORD CHEM+ 2020. [DOI: 10.1134/s1070328420010030] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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11
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Liu Y, Sun W, Wang K, Xu JJ, Chen HY, Xia XH. End Group Properties of Thiols Affecting the Self-Assembly Mechanism at Gold Nanoparticles Film As Evidenced by Water Infrared Probe. Anal Chem 2019; 91:14508-14513. [PMID: 31610652 DOI: 10.1021/acs.analchem.9b03332] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Water infrared probe has been employed for in situ monitoring of the detailed self-assembly processes of four thiol molecules with different end groups (-CH3, -NH2, -COOH, and -OH) on gold nanoparticles (Au NPs) film in aqueous solution. Based on the change of water IR signal, the significant influence of end group properties on the kinetics and thermodynamics of thiols self-assembly can be estimated. It is found that the assembly kinetics of thiols decreases with the increase of the hydrophobicity of the end groups. In addition, the charges carried by the end groups (-COOH and -NH2 terminated thiols) will also slow down the self-assembly kinetics owing to the electrostatic repulsions. However, the isothermal adsorption is only affected by the wettability of the end groups of thiols. The higher hydrophilicity of the end groups results in larger equilibrium constant of the self-assembly process. Results show that water infrared probe offers an additional approach to the monitoring of thiols self-assembly processes with higher sensitivity and more detailed information as compared to traditional molecule fingerprints.
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Affiliation(s)
- Yang Liu
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210023 , China
| | - Wan Sun
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210023 , China
| | - Kang Wang
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210023 , China
| | - Jing-Juan Xu
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210023 , China
| | - Hong-Yuan Chen
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210023 , China
| | - Xing-Hua Xia
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering , Nanjing University , Nanjing 210023 , China
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12
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Huertas CS, Calvo-Lozano O, Mitchell A, Lechuga LM. Advanced Evanescent-Wave Optical Biosensors for the Detection of Nucleic Acids: An Analytic Perspective. Front Chem 2019; 7:724. [PMID: 31709240 PMCID: PMC6823211 DOI: 10.3389/fchem.2019.00724] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Accepted: 10/10/2019] [Indexed: 12/19/2022] Open
Abstract
Evanescent-wave optical biosensors have become an attractive alternative for the screening of nucleic acids in the clinical context. They possess highly sensitive transducers able to perform detection of a wide range of nucleic acid-based biomarkers without the need of any label or marker. These optical biosensor platforms are very versatile, allowing the incorporation of an almost limitless range of biorecognition probes precisely and robustly adhered to the sensor surface by covalent surface chemistry approaches. In addition, their application can be further enhanced by their combination with different processes, thanks to their integration with complex and automated microfluidic systems, facilitating the development of multiplexed and user-friendly platforms. The objective of this work is to provide a comprehensive synopsis of cutting-edge analytical strategies based on these label-free optical biosensors able to deal with the drawbacks related to DNA and RNA detection, from single point mutations assays and epigenetic alterations, to bacterial infections. Several plasmonic and silicon photonic-based biosensors are described together with their most recent applications in this area. We also identify and analyse the main challenges faced when attempting to harness this technology and how several innovative approaches introduced in the last years manage those issues, including the use of new biorecognition probes, surface functionalization approaches, signal amplification and enhancement strategies, as well as, sophisticated microfluidic solutions.
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Affiliation(s)
- Cesar S. Huertas
- Integrated Photonics and Applications Centre, School of Engineering, Royal Melbourne Institute of Technology University, Melbourne, VIC, Australia
| | - Olalla Calvo-Lozano
- Nanobiosensors and Bioanalytical Applications Group, Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and the Barcelona Institute of Science and Technology, CIBER-BBN, Barcelona, Spain
| | - Arnan Mitchell
- Integrated Photonics and Applications Centre, School of Engineering, Royal Melbourne Institute of Technology University, Melbourne, VIC, Australia
| | - Laura M. Lechuga
- Nanobiosensors and Bioanalytical Applications Group, Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and the Barcelona Institute of Science and Technology, CIBER-BBN, Barcelona, Spain
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13
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Gou Z, Zhang X, Zuo Y, Lin W. Synthesis of Silane-Based Poly(thioether) via Successive Click Reaction and Their Applications in Ion Detection and Cell Imaging. Polymers (Basel) 2019; 11:polym11081235. [PMID: 31349686 PMCID: PMC6723054 DOI: 10.3390/polym11081235] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Revised: 07/02/2019] [Accepted: 07/03/2019] [Indexed: 12/15/2022] Open
Abstract
A series of poly(thioether)s containing silicon atom with unconventional fluorescence were synthesized via successive thiol click reaction at room temperature. Although rigid π-conjugated structure did not exist in the polymer chain, the poly(thioether)s exhibited excellent fluorescent properties in solutions and showed visible blue fluorescence in living cells. The strong blue fluorescence can be attributed to the aggregation of lone pair electron of heteroatom and coordination between heteroatom and Si atom. In addition, the responsiveness of poly(thioether) to metal ions suggested that the selectivity of poly(thioether) to Fe3+ ion could be enhanced by end-modifying with different sulfhydryl compounds. This study further explored their application in cell imaging and studied their responsiveness to Fe3+ in living cells. It is expected that the described synthetic route could be extended to synthesize novel poly(thioether)s with superior optical properties. Their application in cell imaging and ion detection will broaden the range of application of poly(thioether)s.
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Affiliation(s)
- Zhiming Gou
- Institute of Fluorescent Probes for Biological Imaging, School of Chemistry and Chemical Engineering, School of Materials Science and Engineering, University of Jinan, Shandong 250022, China
| | - Xiaomei Zhang
- Institute of Fluorescent Probes for Biological Imaging, School of Chemistry and Chemical Engineering, School of Materials Science and Engineering, University of Jinan, Shandong 250022, China
| | - Yujing Zuo
- Institute of Fluorescent Probes for Biological Imaging, School of Chemistry and Chemical Engineering, School of Materials Science and Engineering, University of Jinan, Shandong 250022, China
| | - Weiying Lin
- Institute of Fluorescent Probes for Biological Imaging, School of Chemistry and Chemical Engineering, School of Materials Science and Engineering, University of Jinan, Shandong 250022, China.
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