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Stil A, Liberelle B, Guadarrama Bello D, Lacomme L, Arpin L, Parent P, Nanci A, Dumont ÉC, Ould-Bachir T, Vanni MP, De Crescenzo G, Bouchard JF. A simple method for poly-D-lysine coating to enhance adhesion and maturation of primary cortical neuron cultures in vitro. Front Cell Neurosci 2023; 17:1212097. [PMID: 37416506 PMCID: PMC10320290 DOI: 10.3389/fncel.2023.1212097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Accepted: 06/05/2023] [Indexed: 07/08/2023] Open
Abstract
Introduction Glass coverslips are used as a substrate since Harrison's initial nerve cell culture experiments in 1910. In 1974, the first study of brain cells seeded onto polylysine (PL) coated substrate was published. Usually, neurons adhere quickly to PL coating. However, maintaining cortical neurons in culture on PL coating for a prolonged time is challenging. Methods A collaborative study between chemical engineers and neurobiologists was conducted to find a simple method to enhance neuronal maturation on poly-D-lysine (PDL). In this work, a simple protocol to coat PDL efficiently on coverslips is presented, characterized, and compared to a conventional adsorption method. We studied the adhesion and maturation of primary cortical neurons with various morphological and functional approaches, including phase contrast microscopy, immunocytochemistry, scanning electron microscopy, patch clamp recordings, and calcium imaging. Results We observed that several parameters of neuronal maturation are influenced by the substrate: neurons develop more dense and extended networks and synaptic activity is enhanced, when seeded on covalently bound PDL compared to adsorbed PDL. Discussion Hence, we established reproducible and optimal conditions enhancing maturation of primary cortical neurons in vitro. Our method allows higher reliability and yield of results and could also be profitable for laboratories using PL with other cell types.
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Affiliation(s)
- Aurélie Stil
- École d’optométrie, Université de Montréal, Montreal, QC, Canada
| | - Benoît Liberelle
- Département de Génie Chimique, Polytechnique Montréal, Montreal, QC, Canada
| | | | - Lucile Lacomme
- École d’optométrie, Université de Montréal, Montreal, QC, Canada
| | - Laurie Arpin
- École d’optométrie, Université de Montréal, Montreal, QC, Canada
| | - Pascale Parent
- École d’optométrie, Université de Montréal, Montreal, QC, Canada
| | - Antonio Nanci
- Département de Biochimie et Médecine Moléculaire, Faculté de Médecine Dentaire, Université de Montréal, Montreal, QC, Canada
| | - Éric C. Dumont
- Department of Biomedical and Molecular Sciences, Queen’s University, Kingston, ON, Canada
| | - Tarek Ould-Bachir
- Département de Génie Informatique et Génie Logiciel, Polytechnique Montréal, Montreal, QC, Canada
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Vallejo-Perez M, Ternon C, Spinelli N, Morisot F, Theodorou C, Jayakumar G, Hellström PE, Mouis M, Rapenne L, Mescot X, Salem B, Stambouli V. Optimization of GOPS-Based Functionalization Process and Impact of Aptamer Grafting on the Si Nanonet FET Electrical Properties as First Steps towards Thrombin Electrical Detection. NANOMATERIALS 2020; 10:nano10091842. [PMID: 32942692 PMCID: PMC7559082 DOI: 10.3390/nano10091842] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 09/07/2020] [Accepted: 09/09/2020] [Indexed: 02/07/2023]
Abstract
Field effect transistors (FETs) based on networks of randomly oriented Si nanowires (Si nanonets or Si NNs) were biomodified using Thrombin Binding Aptamer (TBA-15) probe with the final objective to sense thrombin by electrical detection. In this work, the impact of the biomodification on the electrical properties of the Si NN-FETs was studied. First, the results that were obtained for the optimization of the (3-Glycidyloxypropyl)trimethoxysilane (GOPS)-based biofunctionalization process by using UV radiation are reported. The biofunctionalized devices were analyzed by atomic force microscopy (AFM) and scanning transmission electron microscopy (STEM), proving that TBA-15 probes were properly grafted on the surface of the devices, and by means of epifluorescence microscopy it was possible to demonstrate that the UV-assisted GOPS-based functionalization notably improves the homogeneity of the surface DNA distribution. Later, the electrical characteristics of 80 devices were analyzed before and after the biofunctionalization process, indicating that the results are highly dependent on the experimental protocol. We found that the TBA-15 hybridization capacity with its complementary strand is time dependent and that the transfer characteristics of the Si NN-FETs obtained after the TBA-15 probe grafting are also time dependent. These results help to elucidate and define the experimental precautions that must be taken into account to fabricate reproducible devices.
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Affiliation(s)
- Monica Vallejo-Perez
- University Grenoble Alpes, CNRS, Grenoble INP, LMGP, F-38000 Grenoble, France; (M.V.-P.); (F.M.); (L.R.)
- University Grenoble Alpes, CNRS, DCM UMR 5250, F-38000 Grenoble, France;
| | - Céline Ternon
- University Grenoble Alpes, CNRS, Grenoble INP, LMGP, F-38000 Grenoble, France; (M.V.-P.); (F.M.); (L.R.)
- Correspondence: (C.T.); (V.S.)
| | - Nicolas Spinelli
- University Grenoble Alpes, CNRS, DCM UMR 5250, F-38000 Grenoble, France;
| | - Fanny Morisot
- University Grenoble Alpes, CNRS, Grenoble INP, LMGP, F-38000 Grenoble, France; (M.V.-P.); (F.M.); (L.R.)
- University Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, Grenoble INP, IMEP-LAHC, F-38000 Grenoble, France; (C.T.); (M.M.); (X.M.)
| | - Christoforos Theodorou
- University Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, Grenoble INP, IMEP-LAHC, F-38000 Grenoble, France; (C.T.); (M.M.); (X.M.)
| | - Ganesh Jayakumar
- KTH Royal Institute of Technology, Department of Electronics, School of Electrical Engineering and Computer Science, Electrum 229, SE-164 40 Kista, Sweden; (G.J.); (P.-E.H.)
| | - Per-Erik Hellström
- KTH Royal Institute of Technology, Department of Electronics, School of Electrical Engineering and Computer Science, Electrum 229, SE-164 40 Kista, Sweden; (G.J.); (P.-E.H.)
| | - Mireille Mouis
- University Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, Grenoble INP, IMEP-LAHC, F-38000 Grenoble, France; (C.T.); (M.M.); (X.M.)
| | - Laetitia Rapenne
- University Grenoble Alpes, CNRS, Grenoble INP, LMGP, F-38000 Grenoble, France; (M.V.-P.); (F.M.); (L.R.)
| | - Xavier Mescot
- University Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, Grenoble INP, IMEP-LAHC, F-38000 Grenoble, France; (C.T.); (M.M.); (X.M.)
| | - Bassem Salem
- University Grenoble Alpes, CNRS, CEA/LETI Minatec, Grenoble INP, LTM, F-38054 Grenoble, France;
| | - Valérie Stambouli
- University Grenoble Alpes, CNRS, Grenoble INP, LMGP, F-38000 Grenoble, France; (M.V.-P.); (F.M.); (L.R.)
- Correspondence: (C.T.); (V.S.)
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Celebanska A, Chiniforooshan Y, Janik M, Mikulic P, Sellamuthu B, Walsh R, Perreault J, Bock WJ. Label-free cocaine aptasensor based on a long-period fiber grating. OPTICS LETTERS 2019; 44:2482-2485. [PMID: 31090712 DOI: 10.1364/ol.44.002482] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Accepted: 04/16/2019] [Indexed: 06/09/2023]
Abstract
In this Letter, we combined a promising bioreceptor, a cocaine aptamer MN6, with an ultrasensitive optical platform long-period fiber grating (LPFG) to create a new cocaine biosensor. The cocaine induces a conformational rearrangement of the aptamer which changes the refractive index around the LPFG producing a measurable shift of the transmission spectrum. We were able to track subtle interaction between the receptor and cocaine molecules over a concentration range of 25 to 100 μM. The presented biosensor does not require labeling or signal enhancement, resulting in a simple user-friendly device.
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Rozenfeld S, Teller H, Schechter M, Farber R, Krichevski O, Schechter A, Cahan R. Exfoliated molybdenum di-sulfide (MoS2) electrode for hydrogen production in microbial electrolysis cell. Bioelectrochemistry 2018; 123:201-210. [DOI: 10.1016/j.bioelechem.2018.05.007] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Revised: 05/07/2018] [Accepted: 05/08/2018] [Indexed: 10/16/2022]
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Bilgic T, Klok HA. Oligonucleotide Immobilization and Hybridization on Aldehyde-Functionalized Poly(2-hydroxyethyl methacrylate) Brushes. Biomacromolecules 2015; 16:3657-65. [PMID: 26441148 DOI: 10.1021/acs.biomac.5b01116] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
DNA biosensing requires high oligonucleotide binding capacity interface chemistries that can be tuned to maximize probe presentation as well as hybridization efficiency. This contribution investigates the feasibility of aldehyde-functionalized poly(2-hydroxyethyl methacrylate) (PHEMA) brush-based interfaces for oligonucleotide binding and hybridization. These polymer brushes, which allow covalent immobilization of oligonucleotides, are prepared by surface-initiated atom transfer radical polymerization (SI-ATRP) of HEMA followed by a postpolymerization oxidation step to generate side chain aldehyde groups. A series of polymer brushes covering a range of film thicknesses and grafting densities was investigated with regard to their oligonucleotide binding capacity as well as their ability to support oligonucleotide hybridization. Densely grafted brushes were found to have probe oligonucleotide binding capacities of up to ∼30 pmol/cm(2). Increasing the thickness of these densely grafted brush films, however, resulted in a decrease in the oligonucleotide binding capacity. Less densely grafted brushes possess binding capacities of ∼10 pmol/cm(2), which did not significantly depend on film thickness. The oligonucleotide hybridization efficiencies, however, were highest (93%) on those brushes that present the lowest surface concentration of the probe oligonucleotide. These results highlight the importance of optimizing the probe oligonucleotide surface concentration and binding interface chemistry. The versatility and tunability of the PHEMA-based brushes presented herein makes these films a very attractive platform for the immobilization and hybridization of oligonucleotides.
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Affiliation(s)
- Tugba Bilgic
- Institut des Matériaux and Institut des Sciences et Ingénierie Chimiques, Laboratoire des Polymères, Ecole Polytechnique Fédérale de Lausanne (EPFL) , Bâtiment MXD, Station 12, CH-1015 Lausanne, Switzerland
| | - Harm-Anton Klok
- Institut des Matériaux and Institut des Sciences et Ingénierie Chimiques, Laboratoire des Polymères, Ecole Polytechnique Fédérale de Lausanne (EPFL) , Bâtiment MXD, Station 12, CH-1015 Lausanne, Switzerland
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Xing GW, Xiang S, Xue W, Aodeng GW, Liu Y, Zhang JH, Lin JM. Capture of cervical exfoliative cells on a glass slide coated by 3-glycidyloxypropyl trimethoxysilane and poly-L-lysine. J Pharm Anal 2012; 2:174-179. [PMID: 29403739 PMCID: PMC5760912 DOI: 10.1016/j.jpha.2012.02.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2011] [Accepted: 02/22/2012] [Indexed: 11/07/2022] Open
Abstract
A new modification method for glass slides was developed and applied to make ThinPrep Pap smears, in order to increase the adhesion ability of cervical exfoliative cells. 3-glycidyloxypropyl trimethoxysilane (GOPS) was coated on the glass slides firstly on the slides, then poly-L-lysine (PLL) was covalently modified onto the above epoxy-terminated slides to form GOPS-PLL double decorated slides. The modified slides were characterized using X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM). The cell adhesion ability effect was tested and compared with traditional PLL coated slides by fixing the cervical exfoliative cells on the double adorned slides. The control test was conducted by the bare glass slides unmodified. The cell morphology of cervical exfoliative cells adhered on different slides was observed under the microscope after Papanicolaou staining. The number of cervical exfoliative cells on the unmodified slides, PLL coated slides and GOPS-PLL coated slides was 1030±300, 3283±226 and 4119±280 (n=12), respectively. The data among the three different modification methods showed significant differences (one-way analysis of variance, ANOVA test, P<0.05). The cell capturing effect of the GOPS-PLL slide was the best among the three different modified slides. In addition, the GOPS-PLL slide could enhance the uniformity of the adhered cells and be widely applied to the ThinPrep system for cervical carcinoma screening to increase the accuracy rate of diagnosis.
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Affiliation(s)
- Gao-Wa Xing
- School of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, China
- Beijing Key Laboratory of Microanalytical Methods and Instrumentation, Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Sen Xiang
- Beijing Key Laboratory of Microanalytical Methods and Instrumentation, Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Wei Xue
- Beijing Key Laboratory of Microanalytical Methods and Instrumentation, Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Gao-Wa Aodeng
- School of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, China
| | - Yan Liu
- Beijing Center for Physical and Chemical Analysis, Beijing 100084, China
| | - Jing-Hua Zhang
- Beijing Center for Physical and Chemical Analysis, Beijing 100084, China
| | - Jin-Ming Lin
- Beijing Key Laboratory of Microanalytical Methods and Instrumentation, Department of Chemistry, Tsinghua University, Beijing 100084, China
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Gao W, Feng B, Lu X, Wang J, Qu S, Weng J. Characterization and cell behavior of titanium surfaces with PLL/DNA modification via a layer-by-layer technique. J Biomed Mater Res A 2012; 100:2176-85. [DOI: 10.1002/jbm.a.33238] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2011] [Revised: 08/19/2011] [Accepted: 08/19/2011] [Indexed: 11/11/2022]
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Fabrication of oriented poly-l-lysine/bacteriorhodopsin-embedded purple membrane multilayer structure for enhanced photoelectric response. J Colloid Interface Sci 2010; 344:150-7. [DOI: 10.1016/j.jcis.2009.12.013] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2009] [Revised: 12/02/2009] [Accepted: 12/03/2009] [Indexed: 11/21/2022]
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10
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Sethi D, Gandhi RP, Kuma P, Gupta KC. Chemical strategies for immobilization of oligonucleotides. Biotechnol J 2010; 4:1513-29. [PMID: 19844919 DOI: 10.1002/biot.200900162] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The development of oligonucleotide-based microarrays (biochips) is a major thrust area in the rapidly growing biotechnology industry, which encompasses a diverse range of research areas including genomics, proteomics, computational biology, and pharmaceuticals, among other activities. Microarray experiments have proved to be unique in offering cost-effective and efficient analysis at the genomic level. In the last few years, biochips have gained increasing acceptance in the study of genetic and cellular processes. As the increase in experimental throughput has posed many challenges to the research community, considerable progress has been made in the advancement of microarray technology. In this review, chemical strategies for immobilization of oligonucleotides have been highlighted with special emphasis on post-synthetic immobilization of oligonucleotides on glass surface. The major objective of this article is to make the researchers acquainted with some most recent advances in this area.
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Affiliation(s)
- Dalip Sethi
- Institute of Genomics and Integrative Biology, Delhi University Campus, Delhi, India
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Díaz-González M, de la Escosura-Muñiz A, González-García MB, Costa-García A. DNA hybridization biosensors using polylysine modified SPCEs. Biosens Bioelectron 2008; 23:1340-6. [PMID: 18207382 PMCID: PMC7127112 DOI: 10.1016/j.bios.2007.12.001] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2007] [Revised: 11/04/2007] [Accepted: 12/04/2007] [Indexed: 11/20/2022]
Abstract
Two electrochemical DNA hybridization biosensors (genosensors) for the detection of a 30-mer sequence unique to severe acute respiratory syndrome (SARS) virus are described in this work. Both genosensors rely on the hybridization of the oligonucleotide target with its complementary probe, which is immobilized on positively charged polylysine modified screen-printed carbon electrodes (SPCEs), through electrostatic interactions. In one design, a biotinylated target is used and the detection of the hybridization reaction is monitored using alkaline phosphatase labeled streptavidin (S-AP). This enzyme catalyzes the hydrolysis of the substrate 3-indoxyl phosphate (3-IP) to indigo, which is then solubilized to indigo carmine and detected by means of cyclic voltammetry (CV). In the other design, the target is labeled using an Au(I) complex, sodium aurothiomalate, and the duplex formation is detected by measuring, for first time, the current generated by the hydrogen evolution catalyzed by the gold label. Using 30 min of hybridization time, a detection limit of 8 pM is calculated for the enzymatic genosensor. Although this good sensitivity cannot be reached with the metal label (0.5 nM), the use of this label allows a considerable decrease of the analysis time. Both genosensors do not require the modification of the oligonucleotide probe and using stringent experimental conditions (60 min of hybridization time and 50% formamide in the hybridization buffer) can discriminate between a complementary oligonucleotide and an oligonucleotide with a three-base mismatch.
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Affiliation(s)
- María Díaz-González
- Departamento de Química Física y Analítica, Facultad de Química, Universidad de Oviedo, 33006 Oviedo, Asturias, Spain
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Strategies for label-free optical detection. ADVANCES IN BIOCHEMICAL ENGINEERING/BIOTECHNOLOGY 2007; 109:395-432. [PMID: 17999039 DOI: 10.1007/10_2007_076] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A large number of methods using direct detection with label-free systems are known. They compete with the well-introduced fluorescence-based methods. However, recent applications take advantage of label-free detection in protein-protein interactions, high-throughput screening, and high-content screening. These new applications require new strategies for biosensors. It becomes more and more obvious that neither the transduction principle nor the recognition elements for the biomolecular interaction process alone determine the quality of the biosensor. Accordingly, the biosensor system has to be considered as a whole. This chapter focuses on strategies to optimize the detection platform and the biomolecular recognition layer. It concentrates on direct detection methods, with special focus on optical transduction. Since even this restriction still leaves a large number of methods, only microrefractometric and microreflectometric methods using planar transducers have been selected for a detailed description and a listing of applications. However, since many review articles on the physical principles exist, the description is kept short. Other methods are just mentioned in brief and for comparison. The outlook and the applications demonstrate the future perspectives of direct optical detection in bioanalytics.
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