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Deloche A, Vidal FX, Jammas L, Wagner R, Dugas V, Demesmay C. Extending the Affinity Range of Weak Affinity Chromatography for the Identification of Weak Ligands Targeting Membrane Proteins. Molecules 2023; 28:7113. [PMID: 37894592 PMCID: PMC10608817 DOI: 10.3390/molecules28207113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 10/05/2023] [Accepted: 10/11/2023] [Indexed: 10/29/2023] Open
Abstract
The identification of weak-affinity ligands targeting membrane proteins is of great interest in Fragment-Based Drug Design (FBDD). Recently, miniaturized weak affinity chromatography (WAC) has been proposed as a valuable tool to study interactions between small ligands and wild-type membrane proteins embedded in so-called nanodisc biomimetic membranes immobilized on GMA-co-EDMA monoliths in situ-synthesized in capillary columns (less than one microliter in volume). In this proof-of-concept study, the achievable affinity range was limited to medium affinity (low micromolar range). The present work investigates different strategies to extend the affinity range towards low affinities, either by increasing the density of membrane proteins on the chromatographic support or by reducing non-specific interactions with the monolith. The combination of the use of a new and more hydrophilic monolithic support (poly(DHPMA-co-MBA)) and a multilayer nanodisc grafting process (up to three layers) allows a significant increase in the membrane protein density by a more than three-fold factor (up to 5.4 pmol cm-1). Such an increase in protein density associated with reduced non-specific interactions makes it possible to extend the range of detectable affinity, as demonstrated by the identification and characterization of affinities of very low-affinity ligands (Kd values of several hundred micromolar) for the adenosine receptor AA2AR used as a model protein, which was not possible before. The affinity was confirmed by competition experiments.
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Affiliation(s)
- Adrien Deloche
- Institut des Sciences Analytique, Universite Claude Bernard Lyon 1, ISA UMR 5280, CNRS, 5 Rue de la Doua, 69100 Villeurbanne, France; (A.D.); (F.-X.V.); (V.D.)
| | - François-Xavier Vidal
- Institut des Sciences Analytique, Universite Claude Bernard Lyon 1, ISA UMR 5280, CNRS, 5 Rue de la Doua, 69100 Villeurbanne, France; (A.D.); (F.-X.V.); (V.D.)
| | - Lucile Jammas
- Plateforme IMPReSs, CNRS UMR7242, Biotechnologie et Signalisation Cellulaire, Ecole Supérieure de Biotechnologie de Strasbourg, 67400 Illkirch, France (R.W.)
| | - Renaud Wagner
- Plateforme IMPReSs, CNRS UMR7242, Biotechnologie et Signalisation Cellulaire, Ecole Supérieure de Biotechnologie de Strasbourg, 67400 Illkirch, France (R.W.)
| | - Vincent Dugas
- Institut des Sciences Analytique, Universite Claude Bernard Lyon 1, ISA UMR 5280, CNRS, 5 Rue de la Doua, 69100 Villeurbanne, France; (A.D.); (F.-X.V.); (V.D.)
| | - Claire Demesmay
- Institut des Sciences Analytique, Universite Claude Bernard Lyon 1, ISA UMR 5280, CNRS, 5 Rue de la Doua, 69100 Villeurbanne, France; (A.D.); (F.-X.V.); (V.D.)
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Jeanroy F, Comby-Zerbino C, Demesmay C, Dugas V. Miniaturized affinity chromatography: A powerful technique for the isolation of high affinity GAGs sequences prior to their identification by MALDI-TOF MS. Anal Chim Acta 2023; 1277:341656. [PMID: 37604620 DOI: 10.1016/j.aca.2023.341656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Accepted: 07/24/2023] [Indexed: 08/23/2023]
Abstract
Glycosaminoglycans (GAGS) are involved in many biological processes through interactions with a variety of proteins, including proteases, growth factors, cytokines, chemokines and adhesion molecules. Identifying druggable GAG-protein interactions for therapeutic purposes is a challenge for the analytical community. In this context, this work investigates the use of a new miniaturized monolithic affinity column (poly(GMA-co-MBA) grafted with antithrombin III (AT III)) to specifically capture and elute high affinity sequences contained in low molecular weight heparin (enoxaparin) for further on-line characterization. This miniaturized, high binding capacity affinity column allows the specific capture of high-affinity oligosaccharide chains from Enoxaparin, even at low concentrations and with a minimal consumption of AT III. In addition to purification, this elution process enables preconcentration for direct analysis by capillary zone electrophoresis. It was found that many of oligosaccharide chains in enoxaparin were eliminated and that certain chain sequences were retained and enriched. Direct coupling with MALDI-TOF MS was successfully used to further characterize the specifically retained oligosaccharides where nano-ESI-TOF MS failed. After optimization of the sample preparation and ionization parameters, direct on-line analysis was performed by applying the elution volume released from the miniaturized affinity column (≤1 μL) directly to the MALDI plate. Finally, this original miniaturized analytical workflow coupling miniaturized AT III-affinity chromatography to MALDI-TOF MS detection is able to select, enrich and detect and identify high affinity sequences (mainly DP4 in size length with a high degree of sulfation) from low molecular weight heparin samples. A more specific selection of GAG sequences can be achieved by increasing the ionic strength during the washing step of affinity chromatography. This is consistent with the known binding pattern between heparin and AT III.
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Affiliation(s)
- Frédéric Jeanroy
- Université de Lyon, CNRS, Université Claude Bernard Lyon 1, Institut des Sciences Analytiques, UMR, 5280, 5 Rue de la Doua, F-69100, Villeurbanne, France
| | - Clothilde Comby-Zerbino
- Université de Lyon, CNRS, Université Claude Bernard Lyon 1, Institut Lumière Matière, UMR 5306, F-69100, Villeurbanne, France
| | - Claire Demesmay
- Université de Lyon, CNRS, Université Claude Bernard Lyon 1, Institut des Sciences Analytiques, UMR, 5280, 5 Rue de la Doua, F-69100, Villeurbanne, France
| | - Vincent Dugas
- Université de Lyon, CNRS, Université Claude Bernard Lyon 1, Institut des Sciences Analytiques, UMR, 5280, 5 Rue de la Doua, F-69100, Villeurbanne, France.
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Randon J, Dugas V, Demesmay C. Reduce cognitive overload with systemic cause-effect relation maps to teach and learn chromatography. Anal Bioanal Chem 2023; 415:4839-4847. [PMID: 37432441 DOI: 10.1007/s00216-023-04804-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/13/2023] [Indexed: 07/12/2023]
Affiliation(s)
- Jérôme Randon
- Université de Lyon, CNRS, Université Claude Bernard Lyon 1, Institut des Sciences Analytiques, UMR 5280, 5 rue de la Doua, 69100, Villeurbanne, France.
| | - Vincent Dugas
- Université de Lyon, CNRS, Université Claude Bernard Lyon 1, Institut des Sciences Analytiques, UMR 5280, 5 rue de la Doua, 69100, Villeurbanne, France
| | - Claire Demesmay
- Université de Lyon, CNRS, Université Claude Bernard Lyon 1, Institut des Sciences Analytiques, UMR 5280, 5 rue de la Doua, 69100, Villeurbanne, France
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Jeanroy F, Demontrond F, Vidal FX, Gueyrard D, Vidal S, Demesmay C, Dugas V. Deciphering dynamic combinatorial libraries of glycoclusters with miniaturized weak affinity chromatography coupled with mass spectrometry (nano-FAC-MS). Anal Chim Acta 2023; 1261:341227. [PMID: 37147058 DOI: 10.1016/j.aca.2023.341227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 04/12/2023] [Accepted: 04/17/2023] [Indexed: 05/07/2023]
Abstract
We report an original methodology based on affinity chromatography coupled with mass spectrometry to decipher the complexity of dynamic combinatorial libraries (DCLs) of glycoclusters. Such libraries are intended to boost the design of potential therapeutic anti-infectious agents targeting Pseudomonas aeruginosa, which is responsible for numerous diseases, mostly found in hospitals as major a cause of nosocomial infections. Dynamic combinatorial chemistry provides a rapid access to an equilibrating mixture of glycocluster candidates through the formation of reversible covalent bonds under thermodynamic control. Identifying each molecule in the complex mixture overcomes challenges due to the dynamic process. Selection of glycoclusters candidates was first realized on a model lectin (Concanavalin A, ConA). Home-made affinity nanocolumns, containing covalently immobilized ConA and have volumes in the microliter range, were used to separate DCLs of glycoclusters with respect to their specific lectin binding properties under buffered aqueous conditions. Miniaturization facilitates the inline coupling with MS detection in such purely aqueous and buffered conditions and reduces target protein consumption. Monolithic lectin-affinity columns prepared by immobilization of ConA were first characterized using a known ligand. The amount of active binding immobilized lectin is 61 ± 5 pmol on 8.5-cm length column. We demonstrated the ability of our approach to evaluate individual dissociation constants of species directly in the complex mixture. The concept was then successfully applied to the screening of DCLs of more complex glycoclusters to identify (by mass spectrometry) and rank the ligands (by relative breakthrough curve delay) according to their affinity for the immobilized lectin in a single experiment.
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Affiliation(s)
- Frédéric Jeanroy
- Institut des Sciences Analytiques, Université de Lyon, CNRS, Université Claude Bernard Lyon 1, UMR 5280, 5 rue de la Doua, Villeurbanne, F-69100, France
| | - Fanny Demontrond
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, Laboratoire de Chimie Organique 2-Glycochimie, UMR 5246, CNRS, Université Claude Bernard Lyon 1, Université de Lyon, Villeurbanne, 69622, France
| | - François-Xavier Vidal
- Institut des Sciences Analytiques, Université de Lyon, CNRS, Université Claude Bernard Lyon 1, UMR 5280, 5 rue de la Doua, Villeurbanne, F-69100, France
| | - David Gueyrard
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, Laboratoire de Chimie Organique 2-Glycochimie, UMR 5246, CNRS, Université Claude Bernard Lyon 1, Université de Lyon, Villeurbanne, 69622, France
| | - Sébastien Vidal
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires, Laboratoire de Chimie Organique 2-Glycochimie, UMR 5246, CNRS, Université Claude Bernard Lyon 1, Université de Lyon, Villeurbanne, 69622, France; Institut de Chimie des Substances Naturelles, CNRS, Université Paris-Saclay, UPR 2301, Gif-sur-Yvette, 91198, France
| | - Claire Demesmay
- Institut des Sciences Analytiques, Université de Lyon, CNRS, Université Claude Bernard Lyon 1, UMR 5280, 5 rue de la Doua, Villeurbanne, F-69100, France
| | - Vincent Dugas
- Institut des Sciences Analytiques, Université de Lyon, CNRS, Université Claude Bernard Lyon 1, UMR 5280, 5 rue de la Doua, Villeurbanne, F-69100, France.
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Gil J, Krimm I, Dugas V, Demesmay C. Preparation of miniaturized hydrophilic affinity monoliths: Towards a reduction of non-specific interactions and an increased target protein density. J Chromatogr A 2023; 1687:463670. [PMID: 36463648 DOI: 10.1016/j.chroma.2022.463670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 11/23/2022] [Accepted: 11/23/2022] [Indexed: 11/26/2022]
Abstract
In affinity chromatography, non-specific interactions between the ligands and the affinity column may affect the results, leading to misinterpretations during the investigation of protein-ligand interactions (detection of false positives in ligand screening, lack of specificity in purification). Such non-specific interactions may arise both from the underlying support or from the target protein itself. If the second ones are protein-dependent (and cannot be studied in a general framework), the first ones occur in the same way regardless of the immobilized target. We propose a methodology to identify the origin of such non-specific interactions with the underlying material of the affinity column. This methodology relies on the systematic investigation of the retention behavior of a set of 41 low-molecular weight compounds covering a wide chemical space (net charge, log D, functionality). We first demonstrate that the main source of non-specific interactions on the most commonly used GMA-co-EDMA monolith comes from hydrophobic effects. To reduce such non-specific interactions, we developed a new hydrophilic glycidyl methacrylate-based monolith by replacing the EDMA crosslinker by the more hydrophilic NN' Methylenebisacrylamide (MBA). Optimization of the synthesis parameters (monomer content, initiation type, temperature) has focused on the reduction of non-specific interaction with the monolithic support while maximizing the amount of protein that can be grafted onto the monolith at the issue of its synthesis. The retention data of the 41 test solutes on the new poly(GMA-co-MBA) monolith shows a drastic reduction of non-specific interactions except for cationic compounds. The particular behavior of cationic compounds is due to their electrostatic interactions with carboxylic groups resulting from the partial acidic hydrolysis of amide groups of MBA during the epoxide ring opening step. So, the ring opening step in acidic media was replaced by a hot water treatment to avoid side reaction on MBA. The new monolith poly(GMA-co-MBA) not only has improved hydrophilic surface properties but also a higher protein density (16 ± 0.8 pmol cm-1 instead of 8 ± 0.3 pmol cm-1). To highlight the benefits of this new hydrophilic monolith for affinity chromatographic studies, frontal affinity chromatography experiments were conducted on these monoliths grafted with con A.
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Affiliation(s)
- Julie Gil
- Institut des Sciences Analytiques, Université de Lyon, CNRS, Université Claude Bernard Lyon 1, UMR 5280, 5 rue de la Doua, Villeurbanne F-69100, France
| | - Isabelle Krimm
- Centre Léon Bérard, INSERM 1052, CNRS 5286, Centre de Recherche en Cancérologie de Lyon, Small Molecules for Biological Targets Team, Université de Lyon, Université Claude Bernard Lyon 1, Lyon 69373, France
| | - Vincent Dugas
- Institut des Sciences Analytiques, Université de Lyon, CNRS, Université Claude Bernard Lyon 1, UMR 5280, 5 rue de la Doua, Villeurbanne F-69100, France.
| | - Claire Demesmay
- Institut des Sciences Analytiques, Université de Lyon, CNRS, Université Claude Bernard Lyon 1, UMR 5280, 5 rue de la Doua, Villeurbanne F-69100, France
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Gottardini A, Netter C, Dugas V, Demesmay C. Two Original Experimental Setups for Staircase Frontal Affinity Chromatography at the Miniaturized Scale. Anal Chem 2021; 93:16981-16986. [PMID: 34907771 DOI: 10.1021/acs.analchem.1c04772] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Frontal affinity chromatography is a powerful, underappreciated technique for the qualitative (screening) and quantitative (Kd determination) evaluation of biological interactions. Its development has been previously hampered by its sample consumption, limited throughput, and lack of dedicated instrumentation especially at a miniaturized scale. This work describes two original experimental devices allowing nano-frontal affinity chromatography titrations (nano-FAC) to be automatically implemented in the time-saving staircase mode. The first nano-FAC system utilizes a capillary electrophoresis device (7100 CE Agilent system) in the pressurization mode with in situ UV detection. The second nano-FAC experimental setup implements a nano-LC device (Ultimate 3000 Thermo) modified with a 10-port valve equipped with two superloops (loop volume, 5 μL) operating alternatively and automatically in a single run. The benefits and drawbacks of each approach are exemplified using two model protein-ligand interactions (concanavalin A-mannose and concanavalin A-glucose). The two methods result in concordant dissociation constants (Kd) and number of active site (Bact) values, obtained in a fully automated manner, with low sample consumption and good throughput.
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Affiliation(s)
- Andrea Gottardini
- Université de Lyon, CNRS, Université Claude Bernard Lyon 1, Institut des Sciences Analytiques, UMR 5280, 5 Rue de la Doua, F-69100 Villeurbanne, France
| | - Claude Netter
- Thermo Fisher Scientific, 16 Avenue du Québec, BP 30210, Villebon sur Yvette FR-91941, Courtabœuf Cedex, France
| | - Vincent Dugas
- Université de Lyon, CNRS, Université Claude Bernard Lyon 1, Institut des Sciences Analytiques, UMR 5280, 5 Rue de la Doua, F-69100 Villeurbanne, France
| | - Claire Demesmay
- Université de Lyon, CNRS, Université Claude Bernard Lyon 1, Institut des Sciences Analytiques, UMR 5280, 5 Rue de la Doua, F-69100 Villeurbanne, France
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Lecas L, Hartmann L, Caro L, Mohamed-Bouteben S, Raingeval C, Krimm I, Wagner R, Dugas V, Demesmay C. Miniaturized weak affinity chromatography for ligand identification of nanodiscs-embedded G-protein coupled receptors. Anal Chim Acta 2020; 1113:26-35. [DOI: 10.1016/j.aca.2020.03.062] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Revised: 03/27/2020] [Accepted: 03/31/2020] [Indexed: 12/14/2022]
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Lecas L, Dugas V, Demesmay C. Affinity Chromatography: A Powerful Tool in Drug Discovery for Investigating Ligand/membrane Protein Interactions. Separation & Purification Reviews 2020. [DOI: 10.1080/15422119.2020.1749852] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Lucile Lecas
- Institut Des Sciences Analytiques, Université De Lyon, Institut des Sciences Analytiques (UMR 5280-CNRS, UCBLyon 1), 5 rue de la Doua, 69100 Villeurbanne, France
| | - Vincent Dugas
- Institut Des Sciences Analytiques, Université De Lyon, Institut des Sciences Analytiques (UMR 5280-CNRS, UCBLyon 1), 5 rue de la Doua, 69100 Villeurbanne, France
| | - Claire Demesmay
- Institut Des Sciences Analytiques, Université De Lyon, Institut des Sciences Analytiques (UMR 5280-CNRS, UCBLyon 1), 5 rue de la Doua, 69100 Villeurbanne, France
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Liu H, Raffin G, Trutt G, Dugas V, Demesmay C, Randon J. Hyphenation of short monolithic silica capillary column with vacuum ultraviolet spectroscopy detector for light hydrocarbons separation. J Chromatogr A 2019; 1595:174-179. [DOI: 10.1016/j.chroma.2019.02.033] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Revised: 02/08/2019] [Accepted: 02/13/2019] [Indexed: 11/30/2022]
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Néri-Quiroz J, Canto F, Guillerme L, Couston L, Magnaldo A, Dugas V. Microfluidic ballistic regime for the generation of linear gradients inside a capillary column: Proof-of-concept and application to the miniaturized acid-base volumetric titration. Talanta 2019; 196:237-242. [PMID: 30683358 DOI: 10.1016/j.talanta.2018.12.045] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Revised: 12/11/2018] [Accepted: 12/14/2018] [Indexed: 10/27/2022]
Abstract
This work details a simple and original approach for the generation of linear gradients inside straight cylindrical microchannels such as a capillary column. The concept takes advantage of an oft-overlooked regime of dispersion of flowing liquids inside narrow channels: the ballistic regime. The ballistic regime is a pure convective regime and is produced by imposing a high velocity flow in a pre-filled capillary thus limited diffusion takes place. This is obtained by forcing the injection of a plug of solution on a short time scale t, much shorter than t<110×D/r2, D is the diffusion coefficient and r the capillary radius. The result is a stretched solution of a given length or depth of penetration, inside the capillary column. This leads to a linear mean concentration field through the mixing zone forming a linear gradient. In miniaturized systems, this transient regime is followed by mainly radial diffusion of the solution inside the capillary due to the short characteristic diffusion time of narrow channels. A convection-diffusion simulation was used to model the gradient formed under this ballistic regime. A specific experimental prototype set-up was designed to investigate this ballistic regime and the formation of a linear gradient of titrant NaOH solution inside a capillary tubing of 500 µm inner diameter and 35-cm total length pre-filled with nitric acid solution. With this prototype, the linear gradient was then pushed in a non-ballistic regime over a confocal fluorescence point detection system in order to measure the fluorescence emission of a fluorescent dye added to the solutions. Considering strong acid-base reaction, fluorescein was used due to its strong fluorescence dependency with pH near its pKa, i.e 6.4. A first set of experiments was realized to demonstrate the validity of such an approach and to determine the optimal condition for the formation of a linear gradient over 300 mm of the 350-mm capillary length. An injection pressure of 1000-mbars over 0.75 s was chosen. The first result was the stability of the system in its ability to produce reproducible linear gradients. As further proofs of feasibility, samples of different nitric acid concentrations were titrated with a 0.25 M NaOH solution. The result was rapid and reproducible titration curves obtained with a fully automated system that consumes less than approximately 70 µL of sample solution.
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Affiliation(s)
- José Néri-Quiroz
- CEA Nuclear Energy Division, Research Department on Mining and Fuel Recycling Processes, Marcoule, F-30207 Bagnols-sur-Cèze, France; Université de Lyon, Institut des Sciences Analytiques, UMR 5280, CNRS, Université Lyon 1 - 5, rue de la Doua, F-69100 Villeurbanne, France
| | - Fabrice Canto
- CEA Nuclear Energy Division, Research Department on Mining and Fuel Recycling Processes, Marcoule, F-30207 Bagnols-sur-Cèze, France
| | - Laurent Guillerme
- CEA Nuclear Energy Division, Research Department on Mining and Fuel Recycling Processes, Marcoule, F-30207 Bagnols-sur-Cèze, France
| | - Laurent Couston
- CEA Nuclear Energy Division, Research Department on Mining and Fuel Recycling Processes, Marcoule, F-30207 Bagnols-sur-Cèze, France
| | - Alastair Magnaldo
- CEA Nuclear Energy Division, Research Department on Mining and Fuel Recycling Processes, Marcoule, F-30207 Bagnols-sur-Cèze, France
| | - Vincent Dugas
- Université de Lyon, Institut des Sciences Analytiques, UMR 5280, CNRS, Université Lyon 1 - 5, rue de la Doua, F-69100 Villeurbanne, France.
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Espina-Benitez MB, Marconi F, Randon J, Demesmay C, Dugas V. Evaluation of boronate affinity solid-phase extraction coupled in-line to capillary isoelectric focusing for the analysis of catecholamines in urine. Anal Chim Acta 2018; 1034:195-203. [DOI: 10.1016/j.aca.2018.06.017] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2018] [Revised: 06/06/2018] [Accepted: 06/07/2018] [Indexed: 12/11/2022]
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Schindler B, Laloy-Borgna G, Barnes L, Allouche AR, Bouju E, Dugas V, Demesmay C, Compagnon I. Online Separation and Identification of Isomers Using Infrared Multiple Photon Dissociation Ion Spectroscopy Coupled to Liquid Chromatography: Application to the Analysis of Disaccharides Regio-Isomers and Monosaccharide Anomers. Anal Chem 2018; 90:11741-11745. [DOI: 10.1021/acs.analchem.8b02801] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Baptiste Schindler
- Univ Lyon, Université
Claude Bernard Lyon 1, CNRS, Institut Lumière Matière, F-69622 Villeurbanne, France
| | - Gabrielle Laloy-Borgna
- Univ Lyon, Université
Claude Bernard Lyon 1, CNRS, Institut Lumière Matière, F-69622 Villeurbanne, France
| | - Loïc Barnes
- Univ Lyon, Université
Claude Bernard Lyon 1, CNRS, Institut Lumière Matière, F-69622 Villeurbanne, France
| | - Abdul-Rahman Allouche
- Univ Lyon, Université
Claude Bernard Lyon 1, CNRS, Institut Lumière Matière, F-69622 Villeurbanne, France
| | - Elodie Bouju
- Univ Lyon, CNRS,
Université Claude Bernard Lyon 1, Ens de Lyon, Institut des
Sciences Analytiques, UMR 5280, 5 Rue de la Doua, F-69100 Villeurbanne, France
| | - Vincent Dugas
- Univ Lyon, CNRS,
Université Claude Bernard Lyon 1, Ens de Lyon, Institut des
Sciences Analytiques, UMR 5280, 5 Rue de la Doua, F-69100 Villeurbanne, France
| | - Claire Demesmay
- Univ Lyon, CNRS,
Université Claude Bernard Lyon 1, Ens de Lyon, Institut des
Sciences Analytiques, UMR 5280, 5 Rue de la Doua, F-69100 Villeurbanne, France
| | - Isabelle Compagnon
- Univ Lyon, Université
Claude Bernard Lyon 1, CNRS, Institut Lumière Matière, F-69622 Villeurbanne, France
- Institut Universitaire de France IUF, 103 Boulevard St. Michel, Paris F-75005, France
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Zouari M, Bois L, Dugas V, Hbaieb S, Chevalier Y, Kalfat R, Demesmay C. Monolith Passive Adsorbers Prepared with Hydrophobic Porous Silica Rods Coated with Hydrogel. ANAL LETT 2017. [DOI: 10.1080/00032719.2017.1365368] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Meriem Zouari
- Institut des Sciences Analytiques, Université de Lyon 1, Villeurbanne, France
- Institut National de Recherche et d’Analyse Physico-chimique, LR15INRAP03 Laboratoire Matériaux, Traitement et Analyse, BiotechPole Sidi-Thabet, Ariana, Tunisia
- Faculté des Sciences de Tunis, Université de Tunis El Manar, Tunis, Tunisia
| | - Laurence Bois
- Laboratoire des Multimatériaux et Interfaces, Université de Lyon 1, Villeurbanne, France
| | - Vincent Dugas
- Institut des Sciences Analytiques, Université de Lyon 1, Villeurbanne, France
| | - Souhaira Hbaieb
- Institut National de Recherche et d’Analyse Physico-chimique, LR15INRAP03 Laboratoire Matériaux, Traitement et Analyse, BiotechPole Sidi-Thabet, Ariana, Tunisia
- Faculté des Sciences de Tunis, Université de Tunis El Manar, Tunis, Tunisia
| | - Yves Chevalier
- Laboratoire d’Automatique et de Génie des Procédés, Université Lyon 1, Villeurbanne, France
| | - Rafik Kalfat
- Institut National de Recherche et d’Analyse Physico-chimique, LR15INRAP03 Laboratoire Matériaux, Traitement et Analyse, BiotechPole Sidi-Thabet, Ariana, Tunisia
| | - Claire Demesmay
- Institut des Sciences Analytiques, Université de Lyon 1, Villeurbanne, France
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Espina-Benitez MB, Randon J, Demesmay C, Dugas V. Back to BAC: Insights into Boronate Affinity Chromatography Interaction Mechanisms. Separation & Purification Reviews 2017. [DOI: 10.1080/15422119.2017.1365085] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Maria Betzabeth Espina-Benitez
- Université de Lyon, CNRS, Université Claude Bernard Lyon 1, ENS de Lyon, Institut des Sciences Analytiques, Villeurbanne, France
| | - Jérôme Randon
- Université de Lyon, CNRS, Université Claude Bernard Lyon 1, ENS de Lyon, Institut des Sciences Analytiques, Villeurbanne, France
| | - Claire Demesmay
- Université de Lyon, CNRS, Université Claude Bernard Lyon 1, ENS de Lyon, Institut des Sciences Analytiques, Villeurbanne, France
| | - Vincent Dugas
- Université de Lyon, CNRS, Université Claude Bernard Lyon 1, ENS de Lyon, Institut des Sciences Analytiques, Villeurbanne, France
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15
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Espina-Benitez M, Araujo L, Prieto A, Navalón A, Vílchez JL, Valera P, Zambrano A, Dugas V. Development of a New Microextraction Fiber Combined to On-Line Sample Stacking Capillary Electrophoresis UV Detection for Acidic Drugs Determination in Real Water Samples. Int J Environ Res Public Health 2017; 14:ijerph14070739. [PMID: 28686186 PMCID: PMC5551177 DOI: 10.3390/ijerph14070739] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Revised: 06/29/2017] [Accepted: 07/04/2017] [Indexed: 01/26/2023]
Abstract
A new analytical method coupling a (off-line) solid-phase microextraction with an on-line capillary electrophoresis (CE) sample enrichment technique was developed for the analysis of ketoprofen, naproxen and clofibric acid from water samples, which are known as contaminants of emerging concern in aquatic environments. New solid-phase microextraction fibers based on physical coupling of chromatographic supports onto epoxy glue coated needle were studied for the off-line preconcentration of these micropollutants. Identification and quantification of such acidic drugs were done by capillary zone electrophoresis (CZE) using ultraviolet diode array detection (DAD). Further enhancement of concentration sensitivity detection was achieved by on-line CE “acetonitrile stacking” preconcentration technique. Among the eight chromatographic supports investigated, Porapak Q sorbent showed higher extraction and preconcentration capacities. The screening of parameters that influence the microextraction process was carried out using a two-level fractional factorial. Optimization of the most relevant parameters was then done through a surface response three-factor Box-Behnken design. The limits of detection and limits of quantification for the three drugs ranged between 0.96 and 1.27 µg∙L−1 and 2.91 and 3.86 µg∙L−1, respectively. Recovery yields of approximately 95 to 104% were measured. The developed method is simple, precise, accurate, and allows quantification of residues of these micropollutants in Genil River water samples using inexpensive fibers.
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Affiliation(s)
- Maria Espina-Benitez
- Laboratory of Analytical Chemistry and Electrochemistry, Faculty of Engineering, University of Zulia, P.O. Box 4011-A-526, Maracaibo 4005, Venezuela.
- Université de Lyon, CNRS, Université Claude Bernard Lyon 1, ENS de Lyon, Institut des Sciences Analytiques, UMR 5280, 5 rue de la Doua, F-69100 VILLEURBANNE, France.
| | - Lilia Araujo
- Laboratory of Analytical Chemistry and Electrochemistry, Faculty of Engineering, University of Zulia, P.O. Box 4011-A-526, Maracaibo 4005, Venezuela.
| | - Avismelsi Prieto
- Laboratory of Analytical Chemistry and Electrochemistry, Faculty of Engineering, University of Zulia, P.O. Box 4011-A-526, Maracaibo 4005, Venezuela.
| | - Alberto Navalón
- Research Group of Analytical Chemistry and Life Sciences, Department of Analytical Chemistry, Faculty of Sciences, University of Granada, Campus of Fuentenueva, E-18071 Granada, Spain.
| | - José Luis Vílchez
- Research Group of Analytical Chemistry and Life Sciences, Department of Analytical Chemistry, Faculty of Sciences, University of Granada, Campus of Fuentenueva, E-18071 Granada, Spain.
| | - Paola Valera
- Laboratory of Analytical Chemistry and Electrochemistry, Faculty of Engineering, University of Zulia, P.O. Box 4011-A-526, Maracaibo 4005, Venezuela.
| | - Ana Zambrano
- Laboratory of Analytical Chemistry and Electrochemistry, Faculty of Engineering, University of Zulia, P.O. Box 4011-A-526, Maracaibo 4005, Venezuela.
| | - Vincent Dugas
- Université de Lyon, CNRS, Université Claude Bernard Lyon 1, ENS de Lyon, Institut des Sciences Analytiques, UMR 5280, 5 rue de la Doua, F-69100 VILLEURBANNE, France.
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Maniquet A, Bruyer N, Raffin G, Baco-Antionali F, Demesmay C, Dugas V, Randon J. Behavior of macroporous vinyl silica and silica monolithic columns in high pressure gas chromatography. J Chromatogr A 2017; 1504:105-111. [DOI: 10.1016/j.chroma.2017.05.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2017] [Revised: 04/27/2017] [Accepted: 05/02/2017] [Indexed: 12/01/2022]
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17
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Néri-Quiroz J, Canto F, Guillerme L, Couston L, Magnaldo A, Dugas V. Miniaturizing and automation of free acidity measurements for uranium (VI)-HNO3 solutions: Development of a new sequential injection analysis for a sustainable radio-analytical chemistry. Talanta 2016; 159:330-335. [PMID: 27474315 DOI: 10.1016/j.talanta.2016.06.038] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2016] [Revised: 06/13/2016] [Accepted: 06/19/2016] [Indexed: 11/16/2022]
Abstract
A miniaturized and automated approach for the determination of free acidity in solutions containing uranium (VI) is presented. The measurement technique is based on the concept of sequential injection analysis with on-line spectroscopic detection. The proposed methodology relies on the complexation and alkalimetric titration of nitric acid using a pH 5.6 sodium oxalate solution. The titration process is followed by UV/VIS detection at 650nm thanks to addition of Congo red as universal pH indicator. Mixing sequence as well as method validity was investigated by numerical simulation. This new analytical design allows fast (2.3min), reliable and accurate free acidity determination of low volume samples (10µL) containing uranium/[H(+)] moles ratio of 1:3 with relative standard deviation of <7.0% (n=11). The linearity range of the free nitric acid measurement is excellent up to 2.77molL(-1) with a correlation coefficient (R(2)) of 0.995. The method is specific, presence of actinide ions up to 0.54molL(-1) does not interfere on the determination of free nitric acid. In addition to automation, the developed sequential injection analysis method greatly improves the standard off-line oxalate complexation and alkalimetric titration method by reducing thousand fold the required sample volume, forty times the nuclear waste per analysis as well as the analysis time by eight fold. These analytical parameters are important especially in nuclear-related applications to improve laboratory safety, personnel exposure to radioactive samples and to drastically reduce environmental impacts or analytical radioactive waste.
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Affiliation(s)
- José Néri-Quiroz
- CEA Nuclear Energy Division, Radiochemistry & Processes Department, Marcoule, F-30207 Bagnols-sur-Cèze, France
| | - Fabrice Canto
- CEA Nuclear Energy Division, Radiochemistry & Processes Department, Marcoule, F-30207 Bagnols-sur-Cèze, France
| | - Laurent Guillerme
- CEA Nuclear Energy Division, Radiochemistry & Processes Department, Marcoule, F-30207 Bagnols-sur-Cèze, France
| | - Laurent Couston
- CEA Nuclear Energy Division, Radiochemistry & Processes Department, Marcoule, F-30207 Bagnols-sur-Cèze, France
| | - Alastair Magnaldo
- CEA Nuclear Energy Division, Radiochemistry & Processes Department, Marcoule, F-30207 Bagnols-sur-Cèze, France
| | - Vincent Dugas
- Université de Lyon, Institut des Sciences Analytiques, UMR 5280, CNRS, Université Lyon 1, ENS Lyon - 5, rue de la Doua, F-69100 Villeurbanne, France.
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18
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El-Debs R, Cadoux F, Bois L, Bonhommé A, Randon J, Dugas V, Demesmay C. Synthesis and Surface Reactivity of Vinylized Macroporous Silica Monoliths: One-Pot Hybrid versus Postsynthesis Grafting Strategies. Langmuir 2015; 31:11649-11658. [PMID: 26451684 DOI: 10.1021/acs.langmuir.5b02681] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Different synthesis routes have been implemented to prepare macroporous monoliths with vinyl pendant groups and micrometric skeletons and through-pore sizes. A standard process combining the synthesis of a widely used (methyltrimethoxysilane/tetramethoxysilane) (MTMS/TMOS) hybrid silica monolith and the postsilanization with vinyltrimethoxysilane (VTMS) was used as reference material (Vgr-MTMS). An alternative "one-pot" procedure was used to obtain vinylized hybrid monoliths. Two VTMS/TMOS hybrid based monoliths were successfully prepared starting from 20% (w) and 80% (w/w) of VTMS, respectively, called 20-VTMS and 80-VTMS. Monoliths were characterized by SEM, nitrogen-adsorption isotherm, and (29)Si MAS NMR spectroscopy. One-pot synthesis allowed to obtain higher vinyl contents (15.9 and 61.5 mol % of Si atoms bonded to vinyl groups respectively for 20-VTMS and 80-VTMS) than for the postgrafted one (7.1%). Accessibility of vinyl groups was determined by the extent of bromination reactions followed by FTIR-ATR spectroscopy. Bromination with reaction yields were higher than 80% for all materials (80%, 85%, and 100% for 80-VTMS, 20-VTMS, and Vgr-MTMS respectively), with no diffusion issues The chemical reactivity of the pendant vinyl groups was investigated through radical-mediated thiol-ene reaction and radical-initiated bisulfite addition. Reaction yields for the two VTMS hybrid monoliths were quite lower (4-6%) than those obtained (about 50%) for the Vgr-MTMS monolith. The difference in reactivity was attributed to the steric hindrance of the vinyl moieties at the surface of hybrid materials. However, the lower reactivity of vinyl groups is compensated by their considerably higher surface density. Thus, hybrid monoliths are advantageous over their grafted counterparts, due to their higher hydrolytic stability and to the greater simplicity of the one-pot process. A chromatographic application exemplifies their interest and performances in separation science.
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Affiliation(s)
- Racha El-Debs
- Université Claude Bernard Lyon I, Institut des Sciences Analytiques, Université de Lyon , UMR CNRS 5280, 5, rue de la DOUA, 69100 Villeurbanne, France
| | - Franck Cadoux
- Université Claude Bernard Lyon I, Institut des Sciences Analytiques, Université de Lyon , UMR CNRS 5280, 5, rue de la DOUA, 69100 Villeurbanne, France
| | - Laurence Bois
- Université Claude Bernard Lyon I, Laboratoire des Multimatériaux et Interfaces, Université de Lyon , UMR CNRS 5615, 2, Avenue Grignard, 69622 Villeurbanne, cedex, France
| | - Anne Bonhommé
- Université Claude Bernard Lyon I, Institut des Sciences Analytiques, Université de Lyon , UMR CNRS 5280, 5, rue de la DOUA, 69100 Villeurbanne, France
| | - Jérôme Randon
- Université Claude Bernard Lyon I, Institut des Sciences Analytiques, Université de Lyon , UMR CNRS 5280, 5, rue de la DOUA, 69100 Villeurbanne, France
| | - Vincent Dugas
- Université Claude Bernard Lyon I, Institut des Sciences Analytiques, Université de Lyon , UMR CNRS 5280, 5, rue de la DOUA, 69100 Villeurbanne, France
| | - Claire Demesmay
- Université Claude Bernard Lyon I, Institut des Sciences Analytiques, Université de Lyon , UMR CNRS 5280, 5, rue de la DOUA, 69100 Villeurbanne, France
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Ach D, Briançon S, Dugas V, Pelletier J, Broze G, Chevalier Y. Influence of main whey protein components on the mechanism of complex coacervation with Acacia gum. Colloids Surf A Physicochem Eng Asp 2015. [DOI: 10.1016/j.colsurfa.2015.06.006] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Marechal A, Laaniste A, El-Debs R, Dugas V, Demesmay C. Versatile ene-thiol photoclick reaction for preparation of multimodal monolithic silica capillary columns. J Chromatogr A 2014; 1365:140-7. [DOI: 10.1016/j.chroma.2014.09.017] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2014] [Revised: 09/01/2014] [Accepted: 09/07/2014] [Indexed: 10/24/2022]
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21
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Laaniste A, Marechal A, El-Debs R, Randon J, Dugas V, Demesmay C. “Thiol-ene” photoclick chemistry as a rapid and localizable functionalization pathway for silica capillary monolithic columns. J Chromatogr A 2014; 1355:296-300. [DOI: 10.1016/j.chroma.2014.06.031] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2013] [Revised: 05/06/2014] [Accepted: 06/11/2014] [Indexed: 10/25/2022]
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22
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Lereau M, Fournier-Wirth C, Mayen J, Farre C, Meyer A, Dugas V, Cantaloube JF, Chaix C, Vasseur JJ, Morvan F. Development of Innovative and Versatile Polythiol Probes for Use on ELOSA or Electrochemical Biosensors: Application in Hepatitis C Virus Genotyping. Anal Chem 2013; 85:9204-12. [DOI: 10.1021/ac401941x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Myriam Lereau
- Laboratoire
TransDiag—Sécurité Transfusionnelle et Innovation
Diagnostique, Etablissement Français du Sang Pyrénées-Méditerranée, Montpellier, 34184, France
- Département
des Analogues et Constituants des Acides Nucléiques, Institut
des Biomolécules Max Mousseron, UMR 5247 CNRS Université Montpellier 1 Université Montpellier 2, Montpellier, 34095, France
| | - Chantal Fournier-Wirth
- Laboratoire
TransDiag—Sécurité Transfusionnelle et Innovation
Diagnostique, Etablissement Français du Sang Pyrénées-Méditerranée, Montpellier, 34184, France
| | - Julie Mayen
- Département
des Analogues et Constituants des Acides Nucléiques, Institut
des Biomolécules Max Mousseron, UMR 5247 CNRS Université Montpellier 1 Université Montpellier 2, Montpellier, 34095, France
| | - Carole Farre
- Département
Laboratoire des Sciences Analytiques, Institut des Sciences Analytiques, UMR 5280 CNRS Université de Lyon, Université Lyon 1, Villeurbanne, 69100, France
| | - Albert Meyer
- Département
des Analogues et Constituants des Acides Nucléiques, Institut
des Biomolécules Max Mousseron, UMR 5247 CNRS Université Montpellier 1 Université Montpellier 2, Montpellier, 34095, France
| | - Vincent Dugas
- Département
Laboratoire des Sciences Analytiques, Institut des Sciences Analytiques, UMR 5280 CNRS Université de Lyon, Université Lyon 1, Villeurbanne, 69100, France
| | - Jean-François Cantaloube
- Laboratoire
Emergence et Co-évolution Virale, Etablissement Français du Sang Alpes-Méditerranée, Marseille, 13005, France
| | - Carole Chaix
- Département
Laboratoire des Sciences Analytiques, Institut des Sciences Analytiques, UMR 5280 CNRS Université de Lyon, Université Lyon 1, Villeurbanne, 69100, France
| | - Jean-Jacques Vasseur
- Département
des Analogues et Constituants des Acides Nucléiques, Institut
des Biomolécules Max Mousseron, UMR 5247 CNRS Université Montpellier 1 Université Montpellier 2, Montpellier, 34095, France
| | - François Morvan
- Département
des Analogues et Constituants des Acides Nucléiques, Institut
des Biomolécules Max Mousseron, UMR 5247 CNRS Université Montpellier 1 Université Montpellier 2, Montpellier, 34095, France
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El-Debs R, Dugas V, Demesmay C. Photografting as a versatile, localizable, and single-step surface functionalization of silica-based monoliths dedicated to microscale separation techniques. J Sep Sci 2013; 36:993-1001. [PMID: 23495113 DOI: 10.1002/jssc.201200878] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2012] [Revised: 12/05/2012] [Accepted: 12/05/2012] [Indexed: 11/08/2022]
Abstract
In this work, we developed a surface functionalization way of silica monoliths with a rapid, simple, versatile, and localizable photografting step. The elaboration of a photoreactive layer at the surface of monoliths was first optimized. The functionalization with [γ-(methacryloyloxy)propyl]trimethoxysilane at 80°C in a hydro-organic solution containing triethylamine as catalyst allows reachng the highest density of methacrylate photoactive moieties on silica surfaces. These methacrylate reactive surfaces were subsequently photografted within few minutes with acrylate monomers bearing alkyl chains (C12 and C18). The photografting efficiency was determined by monitoring the retentive properties of monoliths in the RP mode. The retention factors are of the same order of magnitude as highly retentive columns obtained by modification of silica surface with long-alkyl chain silanes or by thermal polymerization of long-alkyl chain monomers. It was also verified that such grafting neither impaired the efficiency of the monolithic stationary phase (Hmin = 6-8 μm in nano-LC) nor its permeability (about 6 × 10(-14) m(2)). Further, it was also demonstrated that photografting is localizable in nonmasked defined areas. Results obtained in anion-exchange chromatography after photopolymerization of [2-(methacryloyloxy)ethyl]trimethylammonium chloride are presented as well to demonstrate the versatility of the developed approach.
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Affiliation(s)
- Racha El-Debs
- Institut des Sciences Analytiques, Equipe TechSep, Université de Lyon 1, Villeurbanne, France.
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Lereau M, Mayen J, Farre C, Meyer A, Dugas V, Cantaloube JF, Vasseur JJ, Morvan F, Chaix C, fournier-Wirth C. Nouvelle approche de dépistage viral basée sur l’utilisation de sondes polythiols ultrasensibles. Transfus Clin Biol 2013. [DOI: 10.1016/j.tracli.2013.03.064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Marechal A, El-Debs R, Dugas V, Demesmay C. Is click chemistry attractive for separation sciences? J Sep Sci 2013; 36:2049-62. [DOI: 10.1002/jssc.201300231] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2013] [Revised: 04/12/2013] [Accepted: 04/12/2013] [Indexed: 11/08/2022]
Affiliation(s)
- Audrey Marechal
- Institut des Sciences Analytiques; UMR CNRS 5280, Université de Lyon; Villeurbanne France
| | - Racha El-Debs
- Institut des Sciences Analytiques; UMR CNRS 5280, Université de Lyon; Villeurbanne France
| | - Vincent Dugas
- Institut des Sciences Analytiques; UMR CNRS 5280, Université de Lyon; Villeurbanne France
| | - Claire Demesmay
- Institut des Sciences Analytiques; UMR CNRS 5280, Université de Lyon; Villeurbanne France
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Yang Z, Chevolot Y, Géhin T, Dugas V, Xanthopoulos N, Laporte V, Delair T, Ataman-Önal Y, Choquet-Kastylevsky G, Souteyrand E, Laurenceau E. Characterization of three amino-functionalized surfaces and evaluation of antibody immobilization for the multiplex detection of tumor markers involved in colorectal cancer. Langmuir 2013; 29:1498-1509. [PMID: 23305497 DOI: 10.1021/la3041055] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Antibody microarrays are powerful and high-throughput tools for screening and identifying tumor markers from small sample volumes of only a few microliters. Optimization of surface chemistry and spotting conditions are crucial parameters to enhance antibodies' immobilization efficiency and to maintain their biological activity. Here, we report the implementation of an antibody microarray for the detection of tumor markers involved in colorectal cancer. Three-dimensional microstructured glass slides were functionalized with three different aminated molecules ((3-aminopropyl)dimethylethoxysilane (APDMES), Jeffamine, and chitosan) varying in their chain length, their amine density, and their hydrophilic/hydrophobic balance. The physicochemical properties of the resulting surfaces were characterized. Antibody immobilization efficiency through physical interaction was studied as a function of surface properties as well as a function of the immobilization conditions. The results show that surface energy, steric hindrance, and pH of spotting buffer have great effects on protein immobilization. Under optimal conditions, biological activities of four immobilized antitumor marker antibodies were evaluated in multiplex immunoassay for the detection of the corresponding tumor markers. Results indicated that the chitosan functionalized surface displayed the highest binding capacity and allowed to retain maximal biological activity of the four tested antibody/antigen systems. Thus, we successfully demonstrated the application of amino-based surface modification for antibody microarrays to efficiently detect tumor markers.
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Affiliation(s)
- Zhugen Yang
- Université de Lyon, Institut des Nanotechnologies de Lyon (INL)-UMR CNRS 5270, Ecole Centrale de Lyon, 36 Avenue Guy de Collongue, 69134 Ecully cedex, France
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Gerland B, Goudot A, Pourceau G, Meyer A, Dugas V, Cecioni S, Vidal S, Souteyrand E, Vasseur JJ, Chevolot Y, Morvan F. Synthesis of a library of fucosylated glycoclusters and determination of their binding toward Pseudomonas aeruginosa lectin B (PA-IIL) using a DNA-based carbohydrate microarray. Bioconjug Chem 2012; 23:1534-47. [PMID: 22799498 DOI: 10.1021/bc2006434] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Pseudomonas aeruginosa (PA) is a Gram negative opportunistic pathogen and is the major pathogen encounter in the cystic fibrosis (CF) lung airways. It often leads to chronic respiratory infection despite aggressive antibiotic therapy due to the emergence of resistant strains and to the formation of biofilm. The lectin PA-IIL (LecB) is a fucose-specific lectin from PA suspected to be involved in host recognition/adhesion and in biofilm formation. Thus, it can be foreseen as a potential therapeutic target. Herein, 16 fucosylated glycoclusters with antenna-like, linear, or crown-like spatial arrangements were synthesized using a combination of DNA solid-phase synthesis and alkyne azide 1,3-dipolar cycloaddition (CuAAC). Their binding properties toward PA-IIL were then evaluated based on DNA directed immobilization (DDI) carbohydrate microarray. Our results suggested that the antenna-like scaffold was preferred to linear or crown-like glycoclusters. Among the crown-like carbohydrate centered fucosylated glycoclusters, mannose-based core was better than glucose- and galactose-based ones. The influence of the linker arm was also evaluated, and long linkers between fucoses and the core led to a slight better binding than the short ones.
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Affiliation(s)
- Béatrice Gerland
- Institut des Biomolécules Max Mousseron (IBMM), UMR 5247 CNRS--Université Montpellier 1--Université Montpellier 2, Place Eugène Bataillon, CC1704, 34095 Montpellier Cedex 5, France
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28
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Barron D, Pineau N, Matthey-Doret W, Ali S, Sudre J, Germain JC, Kolodziejczyk E, Pollien P, Labbe D, Jarisch C, Dugas V, Hartmann C, Folmer B. Impact of crema on the aroma release and the in-mouth sensory perception of espresso coffee. Food Funct 2012; 3:923-30. [PMID: 22706310 DOI: 10.1039/c2fo30046j] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A set of six espresso coffees with different foam characteristics and similar above cup and in-mouth flavour sensory profiles was produced by combination of two varying parameters, the extraction pressure and the filtration of the coffee beverage. The coffees were subsequently evaluated in a comparative manner by a set of analytical (headspace, nose-space) and sensory (Temporal Dominance of Sensations) techniques. The presence of espresso crema in its standard quantity was demonstrated to be associated with the optimum release of pleasant high volatiles, both in the above cup headspace and in-mouth. On the other hand, the TDS study demonstrated that increasing amount of crema was associated with increasing roasted dominance along coffee consumption. Furthermore, a parallel was established between the roasted sensory dominance and the dominant release of 2-methylfuran in the nose-space. This was, however, an indirect link as 2-methylfuran was indeed a chemical marker of roasting but does not contribute to the roasted aroma. Lowering the standard amount of crema by filtration clearly decreased the release of pleasant high volatiles and the in-mouth roasted sensory dominance. On the other hand, increasing the usual crema volume by increasing the extraction pressure did not bring any added value concerning the above cup and in-mouth release of pleasant high volatiles.
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Affiliation(s)
- D Barron
- Nestlé Research Center, Lausanne, Switzerland.
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Ladner Y, Bruchet A, Crétier G, Dugas V, Randon J, Faure K. New "one-step" method for the simultaneous synthesis and anchoring of organic monolith inside COC microchip channels. Lab Chip 2012; 12:1680-1685. [PMID: 22430301 DOI: 10.1039/c2lc21211k] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
A new method for monolith synthesis and anchoring inside cyclic olefin copolymer (COC) microchannels in a single step is proposed. It is shown that type I photoinitiators, typically used in a polymerization mixture to generate free radicals during monolith synthesis, can simultaneously act as type II photoinitiators and react with the plastic surface through hydrogen abstraction. This mechanism is used to "photograft" poly(ethylene glycol) methacrylate (PEGMA) on COC surfaces. Contact angle measurements were used to observe the changes in surface hydrophilicity when increasing initiator concentration and irradiation duration. The ability of type I photoinitiators to synthesize and anchor a monolith inside COC microchannels in a single step was proved through SEM observations. Different concentrations of photoinitiators were tried. Finally, electrochromatographic separations of polycyclic aromatic hydrocarbons were realized to illustrate the beneficial effect of anchoring on chromatographic performances. The versatility of the method was demonstrated with two widely used photoinitiators: benzoin methyl ether (BME) and azobisisobutyronitrile (AIBN).
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Affiliation(s)
- Yoann Ladner
- Institut des Sciences Analytiques, UMR UCBL-CNRS 5280, Université de Lyon Université Claude Bernard Lyon 1, Villeurbanne, France
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Faye C, Chamieh J, Moreau T, Granier F, Faure K, Dugas V, Demesmay C, Vandenabeele-Trambouze O. In situ characterization of antibody grafting on porous monolithic supports. Anal Biochem 2012; 420:147-54. [DOI: 10.1016/j.ab.2011.09.016] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2011] [Revised: 09/07/2011] [Accepted: 09/14/2011] [Indexed: 11/26/2022]
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Dugas V, Chevalier Y. Chemical reactions in dense monolayers: in situ thermal cleavage of grafted esters for preparation of solid surfaces functionalized with carboxylic acids. Langmuir 2011; 27:14188-14200. [PMID: 22026445 DOI: 10.1021/la2029438] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The thermodynamics of a chemical reaction confined at a solid surface was investigated through kinetic measurements of a model unimolecular reaction. The thermal cleavage of ester groups grafted at the surface of solid silica was investigated together with complementary physicochemical characterization of the grafted species. The ester molecules were chemically grafted to the silica surface and subsequently cleaved into the carboxylic acids. A grafting process of a reproducible monolayer was designed using the reaction of monofunctional organosilane from its gas phase. The thermal deprotection step of the ester end-group was investigated. The thermal deprotection reaction behaves in quite a specific manner when it is conducted at a surface in a grafted layer. Different organosilane molecules terminated by methyl, isopropyl and tert-butyl ester groups were grafted to silica surface; such functionalized materials were characterized by elemental analysis, IR and NMR spectroscopy, and thermogravimetric analysis, and the thermodynamic parameters of the thermal elimination reaction at the surface were measured. The limiting factor of such thermal ester cleavage reaction is the thermal stability of grafted ester group according to the temperature order: tert-butyl < i-propyl < methyl. Methyl ester groups were not selectively cleaved by temperature. The thermal deprotection of i-propyl ester groups took place at a temperature close to the thermal degradation of the organofunctional tail of the silane. The low thermolysis temperature of the grafted tert-butyl esters allowed their selective cleavage. There is a definite influence of the surface on the reaction. The enthalpy of activation is lower than in the gas phase because of the polarity of the reaction site. The major contribution is entropic; the negative entropy of activation comes from lateral interactions with the neighbor grafted molecules because of the high grafting density. Such reaction is an original strategy to functionalize the silica surface by carboxylic acid groups by means of a simple, reproducible, and efficient process involving in situ thermolysis of ester groups.
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Affiliation(s)
- Vincent Dugas
- Laboratoire des Sciences Analytiques, University of Lyon LSA, UMR CNRS 5180, Université Lyon 1, 43 bd 11 Novembre, 69622 Villeurbanne, France.
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Bruchet A, Dugas V, Laszak I, Mariet C, Goutelard F, Randon J. Synthesis and Characterization of Ammonium Functionalized Porous Poly(glycidyl methacrylate-co-ethylene dimethacrylate) Monoliths for Microscale Analysis and Its Application to DNA Purification. J Biomed Nanotechnol 2011; 7:415-25. [DOI: 10.1166/jbn.2011.1291] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Bruchet A, Dugas V, Mariet C, Goutelard F, Randon J. Improved chromatographic performances of glycidyl methacrylate anion-exchange monolith for fast nano-ion exchange chromatography. J Sep Sci 2011; 34:2079-87. [DOI: 10.1002/jssc.201100180] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2011] [Revised: 04/11/2011] [Accepted: 04/11/2011] [Indexed: 11/10/2022]
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Faure K, Albert M, Dugas V, Crétier G, Ferrigno R, Morin P, Rocca JL. Development of an acrylate monolith in a cyclo-olefin copolymer microfluidic device for chip electrochromatography separation. Electrophoresis 2009; 29:4948-55. [PMID: 19130574 DOI: 10.1002/elps.200800235] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
An acrylate monolith has been synthesized into a cyclic olefin copolymer microdevice for reversed-phase electrochromatography purposes. Microchannels, designed by hot embossing, were filled up with an acrylate monolith to serve as a hydrophobic stationary phase. A lauryl acrylate monolith was formulated to suit the hydrophobic material, by implementing 100% organic porogenic solvent. This new composition was tested in capillary prior to its transfer into the microfluidic device. Surface functionalization of the cyclic olefin copolymer surface was applied using UV-grafting technique to improve the covalent attachment of this monolith to the plastic walls of the microfluidic chip. The on-chip performances of this monolith were evaluated in detail for the reversed-phase electrochromatographic separation of polycyclic aromatic hydrocarbons, with plate heights reaching down to 10 microm when working at optimal velocity.
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Affiliation(s)
- Karine Faure
- Laboratoire des Sciences Analytiques, Université de Lyon, Villeurbanne, France.
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El Khoury G, Laurenceau E, Dugas V, Chevolot Y, Mérieux Y, Duclos MC, Souteyrand E, Rigal D, Wallach J, Cloarec JP. Acid deprotection of covalently immobilized peptide probes on glass slides for peptide microarrays. ACTA ACUST UNITED AC 2007; 2007:2242-6. [PMID: 18002437 DOI: 10.1109/iembs.2007.4352771] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Protein microarray technology has shown great advancements in the field of biomedical research and diagnosis, it allows to study and understand protein activities and protein - ligand interactions (e.g. detection of antigen-autoantibody interaction in autoimmune diseases. Autoantibodies are frequently targeted against antigens of the cell nucleus (double and single stranded DNA, histones, and nuclear antigens). The biological activities of proteins (e.g. enzymes, antibodies...) are controlled by peptides sequences of the active site. Consequently, we were interested in the investigation of peptide microarrays in order to further implement in situ peptide synthesis, in particular, deprotection reaction on glass supported peptides. In this work, a protected and biotinylated synthetic peptide was covalently immobilized onto amino functionalized glass surface by activation of its the C-terminus; this allows to orientate the peptide onto the surface. The peptide contains a fragment of the C-terminal end of the human histone H3 protein. The immobilized peptide was then deprotected by using concentrated trifluoroacetic acid solution. After the deprotection, surface stability and peptide grafting density were evaluated by indirect labelling of the immobilized peptide using Cy3 streptavidin conjugates. We also studied biological interaction of IgG polyclonal anti-histone H3 antibody with the immobilized peptide epitope to insure the efficiency of the acid deprotection. The specificity of the antibody interaction with the protected versus non protected peptides. This approach may be applied to in situ synthetic and prototected peptides, in order to elaborate a micro-immunoassay prototype for measurement of peptide-protein interactions on high density microarrays, and detection of antibodies in biological fluids such as serum.
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Lallemand D, Rouillat MH, Dugas V, Chevolot Y, Souteyrand E, Phaner-Goutorbe M. AFM characterization of ss-DNA probes immobilization: a sequence effect on surface organization. ACTA ACUST UNITED AC 2007. [DOI: 10.1088/1742-6596/61/1/132] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Bessueille F, Dugas V, Vikulov V, Cloarec JP, Souteyrand E, Martin JR. Assessment of porous silicon substrate for well-characterised sensitive DNA chip implement. Biosens Bioelectron 2005; 21:908-16. [PMID: 16257660 DOI: 10.1016/j.bios.2005.02.007] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2004] [Revised: 02/10/2005] [Accepted: 02/15/2005] [Indexed: 11/22/2022]
Abstract
A biochip approach based on porous silicon as substrate is presented. The goal is to enhance the sensitivity of the biochip by increasing the specific surface area on the support. The elaboration of porous silicon layers has been optimized to guarantee good accessibility for large bio-molecule targets. Oligonucleotide probes are synthesised directly on the surface using phosphoramidite chemistry. The high specific surface area of porous silicon allows the direct characterisation, by infrared spectroscopy, of the porous layer formation and the functionalisation steps. The monolayer grafting and derivatisation protocol is additionally characterized by wettability and fluorescence microscopy. The surface modification of porous layers (i.e. thermal oxidation and chemical derivatisation) ensures the stability of the structure against strong chemical reagents used during the direct oligonucleotide synthesis. Finally the protocol is successfully transferred to a flat Si/SiO(2) substrate, and validated by biological target specific recognition during hybridisation tests. In particular, radioactive measurements show a 10-fold enhancement of the oligonucleotide surface density on the porous silicon substrate compared to the flat thermal silica.
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Affiliation(s)
- F Bessueille
- LEOM, UMR CNRS 5512, Ecole Centrale de Lyon, 36 avenue Guy de Collongue, 69134 Ecully Cedex, France
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Saboulard D, Dugas V, Jaber M, Broutin J, Souteyrand E, Sylvestre J, Delcourt M. High-throughput site-directed mutagenesis using oligonucleotides synthesized on DNA chips. Biotechniques 2005; 39:363-8. [PMID: 16206908 DOI: 10.2144/05393st04] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Site-directed mutagenesis has greatly helped researchers both to understand the precise role of specific residues in coding sequences and to generate variants of proteins that have acquired new characteristics. Today's demands for more complete functional cartographies of proteins and advances in selection and screening technologies require that site-directed mutagenesis be adapted for high-throughput applications. We describe here the first generation of a library of single and multiple site-directed mutants using a mixture of oligonucleotides synthesized on DNA chips. We have used the human interleukin 15 (IL15) gene as a model, of which 37 codons were simultaneously targeted for substitution by any of eight possible codons. Ninety-six clones were sequenced, exhibiting a broad spectrum of targeted substitutions over the whole gene length with no unwanted mutations. Libraries produced using such pools of oligonucleotides open new perspectives to direct the evolution of proteins in vitro, by enabling the simple, rapid, and cost-effective generation of large tailor-made genetic diversities from any gene.
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Abstract
DNA chips are potentially powerful technologies for genotyping and gene expression profiling that rely on comparative analyses of up to thousands of "spots of analysis" on a glass support. The spot quality throughout the support influences spot-to-spot variations within an array and the repeatability of data across experiments. For glass slide DNA microarrays, droplets of DNA solution are deposited on functionalized glass slides and left to react through complete evaporation of the droplet. On hydrophobic flat surfaces, different modes of droplet evaporation can be attained. Under atmospheric pressure, water droplets tend to evaporate under two main regimes. Initially, the droplet flattens with a constant contact area, and then the droplet shrinks at a constant contact angle. As a result, the diameter and morphology of thousands of spots on microarrays are not uniform. This leads to poor and unreliable data processing results. In this work, we report the evaporation of an aqueous solution under a constant contact area mode. Evaporation under reduced pressure and the effect of reagent additives to the solution have been investigated. Video microscopy and digital image analysis techniques were applied to monitor the evaporation of the droplets. A mixture of surfactants was developed to maintain a constant area regime during evaporation and to form homogeneous spots. The control of some physicochemical properties (wetting, evaporation rate) of the droplet allows the formation of well-controlled spots compatible with DNA grafting. The influence of surfactant molecules on the mechanisms of evaporation is also discussed.
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Affiliation(s)
- Vincent Dugas
- RosaTech, 36 avenue Guy de Collongue, 69134 Ecully, France.
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Soultani-Vigneron S, Dugas V, Rouillat MH, Fédollière J, Duclos MC, Vnuk E, Phaner-Goutorbe M, Bulone V, Martin JR, Wallach J, Cloarec JP. Immobilisation of oligo-peptidic probes for microarray implementation: Characterisation by FTIR, Atomic Force Microscopy and 2D fluorescence. J Chromatogr B Analyt Technol Biomed Life Sci 2005; 822:304-10. [PMID: 15908289 DOI: 10.1016/j.jchromb.2005.04.019] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2004] [Revised: 04/06/2005] [Accepted: 04/14/2005] [Indexed: 11/21/2022]
Abstract
Proteomic microarrays show a wide range of applications for the investigation of DNA-protein, enzyme-substrate as well as protein-protein interactions. Among many challenges to build a viable "protein microarray", the surface chemistry that will allow to immobilised various proteins to retain their biological activity is of paramount importance. Here we report a chemical functionalisation method allowing immobilisation of oligo-peptides onto silica surface (porous silica, glass, thermal silicon dioxide). Substrates were first derivatised with a monofunctional silane allowing the elaboration of dense and uniform monolayers in highly reproducible way. Prior to the oligo-peptides grafting, this organic layer was functionalised with an amino-polyethyleneglycol. The coupling step of oligo-peptides onto functionalised supports is achieved through activation of the C-terminal function of the oligo-peptides. Chemical surface modifications were followed by FTIR spectroscopy, AFM measurements and fluorescence scanning microscopy. A systematic study of the oligo-peptide grafting conditions (time, concentration, solvent) was carried out to optimise this step. The oligo-peptides grafting strategy implemented in this work ensure a covalent and oriented grafting of the oligo-peptides. This orientation is ensured through the use of fully protected peptide except the terminal primary amine. The immobilized peptides will be then deprotected before biological recognition. This strategy is crucial to retain the biological activity of thousands of oligo-probes assessed on a microarray.
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Brès JC, Mérieux Y, Dugas V, Broutin J, Vnuk E, Jaber M, Rigal D, Martin JR, Souteyrand E, Cabrera M, Cloarec JP. New Method for DNA Microarrays Development: Applied to Human Platelet Antigens Polymorphisms. Biomed Microdevices 2005; 7:137-41. [PMID: 15940428 DOI: 10.1007/s10544-005-1593-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
DNA microarrays are a powerful experimental tool for the detection of specific genomic sequences and are invaluable to a broad array of applications: clinical diagnosis, personalized medicine, drug research and development, gene therapy, food control technologies, and environmental sciences. Alloimmunization to human platelet antigens (HPAs) is commonly responsible for neonatal alloimmune thrombocytopenia, post-transfusional purpura and platelet transfusion refractoriness. Using DNA microarrays, we developed a diagnosis to type the biallelic HPA-1 platelet group. The region for the human genomic DNA sequence that contains the polymorphism responsible for HPA-1 alleles was amplified by polymerase chain reaction (PCR). The expected DNA fragments were hybridized on DNA microarrays, and the data were analyzed using specially developed software. Our initial results show that the two HPA-1 antigens polymorphisms containing a single base difference were detected using DNA microarrays.
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Affiliation(s)
- J-C Brès
- LEOM-UMR 5512, Ecole Centrale de Lyon, BP 163, 69131 Ecully Cedex, France
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Bras M, Dugas V, Bessueille F, Cloarec JP, Martin JR, Cabrera M, Chauvet JP, Souteyrand E, Garrigues M. Optimisation of a silicon/silicon dioxide substrate for a fluorescence DNA microarray. Biosens Bioelectron 2005; 20:797-806. [PMID: 15522595 DOI: 10.1016/j.bios.2004.03.018] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2004] [Revised: 03/15/2004] [Accepted: 03/18/2004] [Indexed: 10/26/2022]
Abstract
This paper presents a comprehensive theory and experimental characterisation of the modulation of the fluorescence intensity by the construction of optical interferences on oxidised silicon substrates used for DNA microarrays. The model predicts a 90-fold variation of the fluorescence signal depending on the oxide thickness. For a Cy3 dye, the signal is maximal for a 90 nm oxide thickness corresponding to a 7.5-fold enhancement with respect to a standard glass substrate. For experimental validation of the model, we have prepared Si/SiO2 substrates with different parallel steps of decreasing oxide thicknesses on the same sample using a buffered oxide etch (BOE) etching process after thermal oxidation. The SiO2 surface has been functionalized by a silane monolayer before in situ synthesis of L185 oligonucleotide probes. After hybridisation with complementary targets, the variations of the fluorescence intensity versus oxide thickness are in very good accordance with the theoretical model. The experimental comparison against a glass substrate shows a 10-fold enhancement of the detection sensitivity. Our results demonstrate that a Si/SiO2 substrate is an attractive alternative to standard glass slides for the realisation of fluorescence DNA microarrays whenever detection sensitivity is an important issue.
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Affiliation(s)
- M Bras
- LEOM, Laboratoire d'Electronique, Optoélectronique et Microsystèmes, UMR 5512, Ecole Centrale de Lyon, 36, avenue Guy de Collongue, F69134 Ecully, France
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Cabrera M, Jaber M, Dugas V, Broutin J, Vnuk E, Cloarec JP, Souteyrand E, Martin JR. Implementation of DNA chips obtained by microprojection for diagnostic and personalized medicine. Cell Mol Biol (Noisy-le-grand) 2004; 50:225-32. [PMID: 15209343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/29/2023]
Abstract
It is expected that rapidly emergent new fields of application for DNA chips will be Diagnostic and Personalized Medicine. These new applications will require a limited number of probes, generally from 100 to 1000. So, after a brief review of the existing techniques to manufacture DNA chips, which are efficient for R&D applications and which often require a higher number of probes, we shall first report some advances in the silanization of the substrates and the grafting of probes to improve the robustness and the reliability of the devices. Then we shall discuss two manufacturing processes working at the scale of a nanoliter of reactant: ex situ and in situ fabrication by microprojection. We shall see how these processes are complementary and may be used to design and produce chips, at a large scale, for these new applications.
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Affiliation(s)
- M Cabrera
- Laboratoire d'Electronique, Optoélectronique et Microsystèmes, UMR CNRS 5512, Ecole Centrale de Lyon, 36 avenue Guy de Collongue, 69130 Ecully Cedex, France.
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Calevro F, Charles H, Reymond N, Dugas V, Cloarec JP, Bernillon J, Rahbé Y, Febvay G, Fayard JM. Assessment of 35mer amino-modified oligonucleotide based microarray with bacterial samples. J Microbiol Methods 2004; 57:207-18. [PMID: 15063061 DOI: 10.1016/j.mimet.2004.01.009] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2003] [Revised: 01/14/2004] [Accepted: 01/15/2004] [Indexed: 12/31/2022]
Abstract
Parallel quantification of a large number of messenger RNA transcripts, using microarray technology, promises to provide unsuspected information about many cellular processes. Although experimental protocols on microarray applications are available, only limited methodological information on glass-slide manufacturing and signal interpretation has been published. The aim of this paper is to provide new insights into the practical aspects of the construction and hybridization of oligonucleotide-based microarrays. The intracellular symbiotic bacterium of aphids, Buchnera aphidicola, is used here as a model organism. The first part of the work is devoted to the optimization of procedures for printing slides, labeling of cDNA targets and hybridization. In the second part, based on a statistical analysis of the results, we discuss the influence of the probe attachment chemistry, of the labeling method, of the oligonucleotide position and of the concentration of a spotted oligonucleotide on signal intensity. The problem of signal specificity is also addressed, based on the calculation of the fluorescent ratio for each probe to its corresponding mismatch control probe. Lastly, the selection of internal spiked RNAs appropriate to our bacterial samples and useful for the data normalization step is presented.
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Affiliation(s)
- Federica Calevro
- UMR INRA/INSA 203, Laboratoire de Biologie Fonctionnelle, Insectes et Interactions, INSA-Lyon, 20 Avenue Albert Einstein, 69621 Villeurbanne Cedex, France.
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Dugas V, Chevalier Y. Surface hydroxylation and silane grafting on fumed and thermal silica. J Colloid Interface Sci 2003; 264:354-61. [PMID: 16256651 DOI: 10.1016/s0021-9797(03)00552-6] [Citation(s) in RCA: 105] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2003] [Accepted: 05/20/2003] [Indexed: 10/27/2022]
Abstract
The optimization of the surface functionalization of flat thermal silicon oxide by silanes was investigated. The difficulties are the low density of silanols at the surface of thermal silica, the lack of precise knowledge of the actual surface chemistry of thermal silica and of its hydroxylation, and the limited number of possible chemical analyses at flat surfaces of small area. This steered our study toward a comparative investigation of the hydroxylation and silane grafting of thermal silica and the well-known fumed silica. The silane grafting density for fumed silica that had undergone thermal treatments of dehydroxylation was related to the surface density of silanols. The surface density of silane on the flat thermal silica as measured by FTIR-ATR spectroscopy was 1.4 micromol/m2, similar to that of fumed silica dehydroxylated at 1000 degrees C. This moderate value was related to the low silanol density present on such silica surfaces. Several rehydroxylation treatments that proved their efficiency on dehydroxylated fumed silica did not lead to any noticeable improvement on thermal silicon dioxide.
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Affiliation(s)
- Vincent Dugas
- Laboratoire des Matériaux Organiques à Propriétés Spécifiques, UMR 5041 CNRS, Université de Savoie, B.P. 24, 69390 Vernaison, France
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