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Somnin C, Chamieh J, Saetear P, Cottet H. Taylor dispersion analysis using capacitively coupled contactless conductivity detector. Talanta 2024; 272:125815. [PMID: 38402737 DOI: 10.1016/j.talanta.2024.125815] [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: 11/12/2023] [Revised: 02/17/2024] [Accepted: 02/18/2024] [Indexed: 02/27/2024]
Abstract
Taylor dispersion analysis (TDA) is a simple and absolute method to determine the hydrodynamic radius of solutes that respond to UV or fluorescence detections. To broaden the application range of TDA, it is necessary to develop new detection modes. This study aims to study capacitively coupled contactless conductivity detector (C4D) for the analysis of charged macromolecules. The detection sensitivities and hydrodynamic radii were compared for a C4D detector and a UV detector on positively or negatively charged polymers responding both to UV and C4D (poly-L-lysine and poly(acrylamide-co-2-acrylamido-1-methyl-propanesulfonate). The influence of the composition of the background electrolyte on the detection sensitivity has been studied and optimized for C4D detection. The influence of the molar mass and of the polymer chemical charge density on the C4D and UV sensitivities of detection have been investigated based on well-characterized copolymers samples of different molar masses and charge densities. The advantages and disadvantages compared to UV detection, as well as the range of applicability of C4D detection in TDA were identified. C4D detection can be an alternative method for sizing charged polymers of reasonable molar mass (typically below 105 g mol-1) that do not absorb in UV. A decline in the sensitivity of detection in C4D was observed for higher molar masses.
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Affiliation(s)
| | - Joseph Chamieh
- IBMM, Université de Montpellier, CNRS, ENSCM, Montpellier, France
| | - Phoonthawee Saetear
- Flow Innovation-Research for Science and Technology Laboratories (Firstlabs), Ratchathewi District, Bangkok, 10110, Thailand; Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Rama 6 Road, Ratchathewi District, Bangkok, 10400, Thailand.
| | - Hervé Cottet
- IBMM, Université de Montpellier, CNRS, ENSCM, Montpellier, France.
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Dhellemmes L, Leclercq L, Frick H, Höchsmann A, Schaschke N, Neusüß C, Cottet H. Investigating cationic and zwitterionic successive multiple ionic-polymer layer coatings for protein separation by capillary electrophoresis. J Chromatogr A 2024; 1720:464802. [PMID: 38507871 DOI: 10.1016/j.chroma.2024.464802] [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: 01/17/2024] [Revised: 03/04/2024] [Accepted: 03/05/2024] [Indexed: 03/22/2024]
Abstract
Successive multiple ionic-polymer layers (SMILs) have long since proved their worth in capillary electrophoresis as they ensure stable electroosmotic flow (EOF) and relatively high separation efficiency. Recently, we demonstrated that plotting the plate height (H) against the solute migration velocity (u) enabled a reliable quantitative evaluation of the coating performances in terms of separation efficiency. In this work, various physicochemical and chemical parameters of the SMIL coating were studied and optimized in order to decrease the slope of the ascending part of the H vs u curve, which is known to be controlled by the homogeneity in charge of the coating surface and by the possible residual solute adsorption onto the coating surface. SMILs based on poly(diallyldimethylammonium chloride) (PDADMAC) and poly(sodium styrene sulfonate) (PSS) were formed and the effect of each polyelectrolyte molar mass and of the number of polyelectrolyte layers (up to 21 layers) was studied. The use of polyethylene imine as an anchoring first layer was considered. More polyelectrolyte couples based on PDADMAC, polybrene, PSS, poly(vinyl sulfate), and poly(acrylic acid) were tested. Finally, zwitterionic polymers based on the poly(α-l-lysine) scaffold were synthesized and used as the last layer of SMILs, illustrating their ability to finetune the EOF, while maintaining good separation efficiency.
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Affiliation(s)
- Laura Dhellemmes
- IBMM, University of Montpellier, CNRS, ENSCM, Montpellier, France
| | - Laurent Leclercq
- IBMM, University of Montpellier, CNRS, ENSCM, Montpellier, France
| | - Henry Frick
- Faculty of Chemistry, Aalen University, Aalen, Germany
| | | | | | | | - Hervé Cottet
- IBMM, University of Montpellier, CNRS, ENSCM, Montpellier, France.
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Roca S, Leclercq L, Cottet H. Size-based characterization of dendrigraft poly(L-lysine) by free solution capillary electrophoresis using polyelectrolyte multilayer coatings. J Chromatogr A 2024; 1718:464719. [PMID: 38340458 DOI: 10.1016/j.chroma.2024.464719] [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: 11/16/2023] [Revised: 01/28/2024] [Accepted: 02/03/2024] [Indexed: 02/12/2024]
Abstract
Dendrigraft poly(L-lysine) (DGL) constitutes a promising dendritic-like drug vehicle with high biocompatibility and straightforward access via ring-opening polymerization of N-carboxyanhydride in water. The characterization of the different generations of DGL is however challenging due to their heterogeneity in molar mass and branching ratio. In this work, free solution capillary electrophoresis was used to perform selective separation of the three first generations of DGL, and optimized conditions were developed to maximize inter-generation resolution. To reduce solute adsorption on the capillary wall, successive multiple ionic polymer layer coatings terminated with a polycation were deposited onto the inner wall surface. PEGylated polycation was also used as the last layer for the control of the electroosmotic flow (EOF), depending on the PEGylation degree and the methyl-polyethylene glycol (mPEG) chain length. 1 kDa mPEG chains and low grafting densities were found to be the best experimental conditions for a fine tuning of the EOF leading to high peak resolution. Molar mass polydispersity and polydispersity in effective electrophoretic mobility were successfully determined for the three first generations of DGL.
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Affiliation(s)
- Sébastien Roca
- IBMM, University of Montpellier, CNRS, ENSCM, Montpellier, France
| | - Laurent Leclercq
- IBMM, University of Montpellier, CNRS, ENSCM, Montpellier, France.
| | - Hervé Cottet
- IBMM, University of Montpellier, CNRS, ENSCM, Montpellier, France.
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Jörgensen AM, Wibel R, Veider F, Hoyer B, Chamieh J, Cottet H, Bernkop-Schnürch A. Self-emulsifying drug delivery systems (SEDDS): How organic solvent release governs the fate of their cargo. Int J Pharm 2023; 647:123534. [PMID: 37863448 DOI: 10.1016/j.ijpharm.2023.123534] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [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: 08/09/2023] [Revised: 10/17/2023] [Accepted: 10/17/2023] [Indexed: 10/22/2023]
Abstract
Organic solvents are commonly used in self-emulsifying drug delivery systems (SEDDS) to increase payloads of orally administered poorly soluble drugs. Since such solvents are released to a varying extent after emulsification, depending on their hydrophilic nature, they have a substantial impact on the cargo. To investigate this impact in detail, quercetin and curcumin as model drugs were incorporated in SEDDS comprising organic solvents (SEDDS-solvent) of logP < 2 and > 2. SEDDS were characterized regarding size, payload, emulsification time and solvent release. The effect of solvent release on the solubility of these drugs was determined. Preconcentrates of SEDDS-solventlogP < 2 emulsified more rapidly (< 1.5 min) forming smaller droplets than SEDDS-solventlogP > 2. Although, SEDDS-solventlogP < 2 preconcentrates provided higher quercetin solubility than the latter, a more pronounced solvent release caused a more rapid quercetin precipitation after emulsification (1.5 versus 4 h). In contrast, the more lipophilic curcumin was not affected by solvent release at all. Particularly, SEDDS-solventlogP < 2 preconcentrates provided high drug payloads without showing precipitation after emulsification. According to these results, the fate of moderate lipophilic drugs such as quercetin is governed by the release of solvent, whereas more lipophilic drugs such as curcumin remain inside the oily phase of SEDDS even when the solvent is released.
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Affiliation(s)
- Arne Matteo Jörgensen
- Department of Pharmaceutical Technology, University of Innsbruck, Institute of Pharmacy, Center for Chemistry and Biomedicine, 6020 Innsbruck, Austria
| | - Richard Wibel
- Department of Pharmaceutical Technology, University of Innsbruck, Institute of Pharmacy, Center for Chemistry and Biomedicine, 6020 Innsbruck, Austria
| | - Florina Veider
- Department of Pharmaceutical Technology, University of Innsbruck, Institute of Pharmacy, Center for Chemistry and Biomedicine, 6020 Innsbruck, Austria
| | - Barbara Hoyer
- Department of Pharmaceutical Technology, University of Innsbruck, Institute of Pharmacy, Center for Chemistry and Biomedicine, 6020 Innsbruck, Austria
| | - Joseph Chamieh
- IBMM, University of Montpellier, CNRS, ENSCM, 34095 Montpellier, France
| | - Hervé Cottet
- IBMM, University of Montpellier, CNRS, ENSCM, 34095 Montpellier, France
| | - Andreas Bernkop-Schnürch
- Department of Pharmaceutical Technology, University of Innsbruck, Institute of Pharmacy, Center for Chemistry and Biomedicine, 6020 Innsbruck, Austria.
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Obeid S, Chamieh J, Mai TD, Morani M, Reyre M, Krupova Z, Defrenaix P, Cottet H, Taverna M. Fast, simple and calibration-free size characterization and quality control of extracellular vesicles using capillary Taylor dispersion analysis. J Chromatogr A 2023; 1705:464189. [PMID: 37442068 DOI: 10.1016/j.chroma.2023.464189] [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: 03/20/2023] [Revised: 06/28/2023] [Accepted: 06/29/2023] [Indexed: 07/15/2023]
Abstract
This study reports the development of a Taylor Dispersion Analysis (TDA) method for the size characterization of Extracellular Vesicles (EVs), which are highly heterogeneous nanoscale cell-derived vesicles (30-1000 nm). Here, we showed that TDA, conducted in uncoated fused silica capillaries (50 µm i.d.) using a conventional Capillary Electrophoresis instrument, is able to provide absolute sizing (requiring no calibration) of bovine milk-derived EVs in a small sample volume (∼ 7 nL) and over their entire size range, even the smallest ones (< 70 nm) not accessible via other techniques that provide nanoparticle sizing in suspension. TDA size measurements were repeatable (RSD < 10%) and the average EV sizes were found in the range of 120-210 nm, in very good agreement with those measured with Nanoparticle Tracking Analysis, commonly used for EV characterization. TDA allowed quantitative estimation of EVs for concentrations ≥ 2 × 1011 EVs/mL. Furthermore, TDA was able to detect minor changes in EV size (i.e. by ∼25 nm upon interaction with specific anti-CD9 antibodies of ∼150 kDa), and to highlight the impact of extraction methods (i.e. milk pretreatment: freezing, acid precipitation or centrifugation; the type of size-exclusion chromatography column) and of fluorescent labeling (i.e. intravesicular or surface labeling) on the isolated EV population size. In parallel to EV sizing, TDA allowed to detect molecular contaminants (average sizes ∼1-13 nm) present within the sample, rendering this method a valuable tool to assess the quality and quantity of EV isolates.
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Affiliation(s)
- Sameh Obeid
- Université Paris-Saclay, CNRS, Institut Galien Paris-Saclay, Orsay 91400, France
| | - Joseph Chamieh
- IBMM, Université de Montpellier, CNRS, ENSCM, Montpellier, France
| | - Thanh Duc Mai
- Université Paris-Saclay, CNRS, Institut Galien Paris-Saclay, Orsay 91400, France
| | - Marco Morani
- Université Paris-Saclay, CNRS, Institut Galien Paris-Saclay, Orsay 91400, France
| | - Melissa Reyre
- Excilone - 6, Rue Blaise Pascal - Parc Euclide, Elancourt 78990, France
| | - Zuzana Krupova
- Excilone - 6, Rue Blaise Pascal - Parc Euclide, Elancourt 78990, France
| | - Pierre Defrenaix
- Excilone - 6, Rue Blaise Pascal - Parc Euclide, Elancourt 78990, France
| | - Hervé Cottet
- IBMM, Université de Montpellier, CNRS, ENSCM, Montpellier, France
| | - Myriam Taverna
- Université Paris-Saclay, CNRS, Institut Galien Paris-Saclay, Orsay 91400, France.
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Malburet C, Martin M, Leclercq L, Cotte JF, Thiebaud J, Biron JP, Chamieh J, Cottet H. Optimization of limit of detection in Taylor Dispersion Analysis: application to the size determination of vaccine antigens. Talanta Open 2023. [DOI: 10.1016/j.talo.2023.100209] [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: 04/04/2023] Open
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7
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Dhellemmes L, Leclercq L, Höchsmann A, Neusüß C, Biron JP, Roca S, Cottet H. Critical parameters for highly efficient and reproducible polyelectrolyte multilayer coatings for protein separation by capillary electrophoresis. J Chromatogr A 2023; 1695:463912. [PMID: 36972664 DOI: 10.1016/j.chroma.2023.463912] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Revised: 03/01/2023] [Accepted: 03/02/2023] [Indexed: 03/08/2023]
Abstract
Since the introduction of polyelectrolyte multilayers to protein separation in capillary electrophoresis (CE), some progress has been made to improve separation efficiency by varying different parameters, such as buffer ionic strength and pH, polyelectrolyte nature and number of deposited layers. However, CE is often overlooked as it lacks robustness compared to other separation techniques. In this work, critical parameters for the construction of efficient and reproducible Successive multiple ionic-polymer layers (SMIL) coatings were investigated, focusing on experimental conditions, such as vial preparation and sample conservation which were shown to have a significant impact on separation performances. In addition to repeatability, intra- and inter-capillary precision were assessed, demonstrating the improved capability of poly(diallyldimethylammonium chloride) / poly(sodium styrene sulfonate) (PDADMAC / PSS) coated capillaries to separate model proteins in a 2 M acetic acid background electrolyte when all the correct precautions are put in place (with run to run%RSD(tm) < 1.8%, day to day%RSD(tm) < 3.2% and cap to cap%RSD(tm) < 4.6%). The approach recently introduced to calculate retention factors was used to quantify residual protein adsorption onto the capillary wall and to assess capillary coating performances. 5-layer PDADAMAC / PSS coatings led to average retention factors for the five model proteins of ∼4×10-2. These values suggest a relatively low residual protein adsorption leading to reasonably flat plate height vs linear velocity curves, obtained by performing electrophoretic separations at different electrical voltages (-10 to -25 kV).
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Malburet C, Leclercq L, Cotte JF, Thiebaud J, Bazin E, Garinot M, Cottet H. Taylor Dispersion Analysis to support lipid-nanoparticle formulations for mRNA vaccines. Gene Ther 2022; 30:421-428. [PMID: 36316446 PMCID: PMC9628342 DOI: 10.1038/s41434-022-00370-1] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Revised: 09/19/2022] [Accepted: 10/04/2022] [Indexed: 12/02/2022]
Abstract
Lipid nanoparticles (LNPs) are currently the most advanced non-viral clinically approved messenger ribonucleic acid (mRNA) delivery systems. The ability of a mRNA vaccine to have a therapeutic effect is related to the capacity of LNPs to deliver the nucleic acid intact into cells. The role of LNPs is to protect mRNA, especially from degradation by ribonucleases (RNases) and to allow it to access the cytoplasm of cells where it can be translated into the protein of interest. LNPs enter cells by endocytosis and their size is a critical parameter impacting their cellular internalization. In this work, we studied different formulation process parameters impacting LNPs size. Taylor dispersion analysis (TDA) was used to determine the LNPs size and size distribution and the results were compared with those obtained by Dynamic Light Scattering (DLS). TDA was also used to study both the degradation of mRNA in the presence of RNases and the percentage of mRNA encapsulation within LNPs.
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Affiliation(s)
- Camille Malburet
- grid.462008.8IBMM, University of Montpellier, CNRS, ENSCM, Montpellier, France ,grid.417924.dSanofi Pasteur, 1541 avenue Marcel Mérieux, 69280 Marcy l’Etoile, France
| | - Laurent Leclercq
- grid.462008.8IBMM, University of Montpellier, CNRS, ENSCM, Montpellier, France
| | - Jean-François Cotte
- grid.417924.dSanofi Pasteur, 1541 avenue Marcel Mérieux, 69280 Marcy l’Etoile, France
| | - Jérôme Thiebaud
- grid.417924.dSanofi Pasteur, 1541 avenue Marcel Mérieux, 69280 Marcy l’Etoile, France
| | - Emilie Bazin
- grid.417924.dSanofi Pasteur, 1541 avenue Marcel Mérieux, 69280 Marcy l’Etoile, France
| | - Marie Garinot
- grid.417924.dSanofi Pasteur, 1541 avenue Marcel Mérieux, 69280 Marcy l’Etoile, France
| | - Hervé Cottet
- grid.462008.8IBMM, University of Montpellier, CNRS, ENSCM, Montpellier, France
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Deleanu M, Hernandez J, Cottet H, Chamieh J. Taylor dispersion analysis discloses the impairment of Aβ peptide aggregation by the presence of a fluorescent tag. Electrophoresis 2022; 44:701-710. [PMID: 36308033 DOI: 10.1002/elps.202200192] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Revised: 09/22/2022] [Accepted: 10/10/2022] [Indexed: 11/06/2022]
Abstract
The use of fluorescently tagged amyloid peptides, implicated in Alzheimer's disease, to study their aggregation at low concentrations is a common method; however, the fluorescent tag should not introduce a bias in the aggregation process. In this work, native amyloid peptides Aβ(1-40) and Aβ(1-42) and fluorescein-5-isothiocyanate (FITC), tagged ones, were studied using Taylor dispersion analysis coupled with a simultaneous UV and light-emitting diode-induced fluorescence detection, to unravel the effect of FITC on the aggregation process. For that, a total concentration of 100 µM of peptides consisting of a mixture of native and tagged ones (up to 10% in moles) was applied. Results demonstrated that FITC had a strong inhibition effect upon the aggregation behaviour of Aβ(1-42), whereas for Aβ(1-40), only a retardation in kinetics was observed. It was also shown that when mixed solutions of Aβ(1-40) and Aβ(1-42) are used, the Aβ(1-42) alloform was the leading peptide in the aggregation process, and when the latter was tagged, the aggregation kinetics decreased but the lifetime of potentially toxic oligomers was drastically increased. These results confirmed that the hydrophilicity of the N-terminus part of the peptide plays a major role in the aggregation process.
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Affiliation(s)
- Mihai Deleanu
- IBMM, Université Montpellier, CNRS, ENSCM Montpellier France
| | | | - Hervé Cottet
- IBMM, Université Montpellier, CNRS, ENSCM Montpellier France
| | - Joseph Chamieh
- IBMM, Université Montpellier, CNRS, ENSCM Montpellier France
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Roca S, Dhellemmes L, Leclercq L, Cottet H. Polyelectrolyte Multilayers in Capillary Electrophoresis. Chempluschem 2022; 87:e202200028. [PMID: 35388990 DOI: 10.1002/cplu.202200028] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 03/19/2022] [Indexed: 02/21/2024]
Abstract
Capillary electrophoresis (CE) has been proven to be a performant analytical method to analyze both small and macro molecules. Indeed, it is capable of separating compounds of the same nature according to differences in their charge to size ratios, particularly proteins, monoclonal antibodies and peptides. However, one of the major obstacles to reach high separation efficiency remains the adsorption of solutes on the capillary wall. Among the different coating approaches used to control and minimize solute adsorption, polyelectrolyte multilayers can be applied to CE as a versatile approach. These coatings are made up of alternating layers of polycations and polyanions, and may be used in acidic, neutral or basic conditions depending on the solutes to be analyzed. This Review provides an overview of Successive Multiple Ionic-polymer Layer (SMIL) coatings used in CE, looking at how different parameters induce variations on the electro-osmotic flow (EOF), separation efficiency and coating stability, as well as their promising applications in the biopharmaceutical field.
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Affiliation(s)
- Sébastien Roca
- IBMM, University of Montpellier, CNRS, ENSCM, Montpellier, France
| | - Laura Dhellemmes
- IBMM, University of Montpellier, CNRS, ENSCM, Montpellier, France
| | - Laurent Leclercq
- IBMM, University of Montpellier, CNRS, ENSCM, Montpellier, France
| | - Hervé Cottet
- IBMM, University of Montpellier, CNRS, ENSCM, Montpellier, France
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Abstract
Messenger RNA vaccines have come into the spotlight as a promising and adaptive alternative to conventional vaccine approaches. The efficacy of mRNA vaccines relies on the ability of mRNA to reach the cytoplasm of cells, where it can be translated into proteins of interest, allowing it to trigger the immune response. However, unprotected mRNA is unstable and susceptible to degradation by exo- and endonucleases, and its negative charges are electrostatically repulsed by the anionic cell membranes. Therefore, mRNA needs a delivery system that protects the nucleic acid from degradation and allows it to enter into the cells. Lipid nanoparticles (LNPs) represent a nonviral leading vector for mRNA delivery. Physicochemical parameters of LNPs, including their size and their charge, directly impact their in vivo behavior and, therefore, their cellular internalization. In this work, Taylor dispersion analysis (TDA) was used as a new methodology for the characterization of the size and polydispersity of LNPs, and capillary electrophoresis (CE) was used for the determination of LNP global charge. The results obtained were compared with those obtained by dynamic light scattering (DLS) and laser Doppler electrophoresis (LDE).
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Affiliation(s)
- Camille Malburet
- IBMM, University of Montpellier, CNRS, ENSCM, Montpellier France
- Sanofi Pasteur, 1541 avenue Marcel Mérieux, 69280 Marcy l'Etoile, France
| | - Laurent Leclercq
- IBMM, University of Montpellier, CNRS, ENSCM, Montpellier France
| | | | - Jérôme Thiebaud
- Sanofi Pasteur, 1541 avenue Marcel Mérieux, 69280 Marcy l'Etoile, France
| | - Emilie Bazin
- Sanofi Pasteur, 1541 avenue Marcel Mérieux, 69280 Marcy l'Etoile, France
| | - Marie Garinot
- Sanofi Pasteur, 1541 avenue Marcel Mérieux, 69280 Marcy l'Etoile, France
| | - Hervé Cottet
- IBMM, University of Montpellier, CNRS, ENSCM, Montpellier France
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Deleanu M, Deschaume O, Cipelletti L, Hernandez JF, Bartic C, Cottet H, Chamieh J. Taylor Dispersion Analysis and Atomic Force Microscopy Provide a Quantitative Insight into the Aggregation Kinetics of Aβ (1-40)/Aβ (1-42) Amyloid Peptide Mixtures. ACS Chem Neurosci 2022; 13:786-795. [PMID: 35201761 DOI: 10.1021/acschemneuro.1c00784] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Aggregation of amyloid β peptides is known to be one of the main processes responsible for Alzheimer's disease. The resulting dementia is believed to be due in part to the formation of potentially toxic oligomers. However, the study of such intermediates and the understanding of how they form are very challenging because they are heterogeneous and transient in nature. Unfortunately, few techniques can quantify, in real time, the proportion and the size of the different soluble species during the aggregation process. In a previous work (Deleanu et al. Anal. Chem. 2021, 93, 6523-6533), we showed the potential of Taylor dispersion analysis (TDA) in amyloid speciation during the aggregation process of Aβ (1-40) and Aβ (1-42). The current work aims at exploring in detail the aggregation of amyloid Aβ (1-40):Aβ (1-42) peptide mixtures with different proportions of each peptide (1:0, 3:1, 1:1, 1:3, and 0:1) using TDA and atomic force microscopy (AFM). TDA allowed for monitoring the kinetics of the amyloid assembly and quantifying the transient intermediates. Complementarily, AFM allowed the formation of insoluble fibrils to be visualized. Together, the two techniques enabled us to study the influence of the peptide ratios on the kinetics and the formation of potentially toxic oligomeric species.
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Affiliation(s)
- Mihai Deleanu
- IBMM, Univ Montpellier, CNRS, ENSCM, 34095 Montpellier, France
| | - Olivier Deschaume
- Department of Physics and Astronomy, Soft-Matter Physics and Biophysics Section, KU Leuven, Celestijnenlaan 200D, Box 2416, 3001 Heverlee, Belgium
| | - Luca Cipelletti
- L2C, Université Montpellier, 34095 Montpellier, France
- Institut Universitaire de France (IUF), Paris, France
| | | | - Carmen Bartic
- Department of Physics and Astronomy, Soft-Matter Physics and Biophysics Section, KU Leuven, Celestijnenlaan 200D, Box 2416, 3001 Heverlee, Belgium
| | - Hervé Cottet
- IBMM, Univ Montpellier, CNRS, ENSCM, 34095 Montpellier, France
| | - Joseph Chamieh
- IBMM, Univ Montpellier, CNRS, ENSCM, 34095 Montpellier, France
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Leclercq X, Leclercq L, Guillard A, Rodriguez L, Braun O, Favero C, Cottet H. Determination of ultrahigh molar mass of polyelectrolytes by Taylor dispersion analysis. J Chromatogr A 2022; 1670:462949. [DOI: 10.1016/j.chroma.2022.462949] [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] [Received: 02/06/2022] [Revised: 03/07/2022] [Accepted: 03/07/2022] [Indexed: 10/18/2022]
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Malburet C, Leclercq L, Cotte JF, Thiebaud J, Cottet H. Separation of three strains of polio virus by capillary zone electrophoresis and study of their interaction with aluminum oxyhydroxide. J Chromatogr A 2022; 1667:462838. [DOI: 10.1016/j.chroma.2022.462838] [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] [Received: 11/07/2021] [Revised: 01/17/2022] [Accepted: 01/19/2022] [Indexed: 10/19/2022]
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15
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Salzer L, Stolz A, Dhellemmes L, Höchsmann A, Leclercq L, Cottet H, Neusüß C. Successive Multiple Ionic-Polymer Layer Coatings for Intact Protein Analysis by Capillary Zone Electrophoresis-Mass Spectrometry: Application to Hemoglobin Analysis. Methods Mol Biol 2022; 2531:69-76. [PMID: 35941479 DOI: 10.1007/978-1-0716-2493-7_5] [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] [Indexed: 06/15/2023]
Abstract
Adsorption of analytes, e.g., proteins, often interfere with separation in CE, due to the relatively large surface of the narrow capillary. Coatings often are applied to prevent adsorption and to determine the electroosmotic flow (EOF), which is of major importance for the separation in CE. Successive multiple ionic-polymer layer (SMIL) coatings are frequently used for protein analysis in capillary electrophoresis resulting in high separation efficiency and repeatability. Here, the coating procedure of a five-layer SMIL coating is described using quaternized diethylaminoethyl dextran (DEAEDq) as polycation and poly(methacrylic acid) (PMA) as polyanion. Depending on the analyte, different polyions may be used to increase separation efficiency. However, the coating procedure remains the same.To demonstrate the applicability of SMIL coatings in CE-MS, human hemoglobin was measured in a BGE containing 2 M acetic acid. DEAEDq-PMA coating was found to be the most suitable for hemoglobin analysis due to relatively low reversed electroosmotic mobility leading to increased electrophoretic resolution of closely related proteoforms. Thereby, not only alpha and beta subunit of the hemoglobin could be separated, but also positional isoforms of glycated and carbamylated species were separated within 24 min.
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Affiliation(s)
- Liesa Salzer
- Faculty of Chemistry, Aalen University, Aalen, Germany
- Analytical BioGeoChemistry (BGC), Helmholtz Zentrum München, Neuherberg, Germany
| | | | - Laura Dhellemmes
- Institut des Biomolécules Max Mousseron, UMR CNRS, Université de Montpellier, Montpellier, France
| | | | - Laurent Leclercq
- Institut des Biomolécules Max Mousseron, UMR CNRS, Université de Montpellier, Montpellier, France
| | - Hervé Cottet
- Institut des Biomolécules Max Mousseron, UMR CNRS, Université de Montpellier, Montpellier, France
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16
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Labied L, Rocchi P, Doussineau T, Randon J, Tillement O, Cottet H, Lux F, Hagège A. Biodegradation of metal-based ultra-small nanoparticles: A combined approach using TDA-ICP-MS and CE-ICP-MS. Anal Chim Acta 2021; 1185:339081. [PMID: 34711326 DOI: 10.1016/j.aca.2021.339081] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [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: 06/11/2021] [Revised: 09/15/2021] [Accepted: 09/16/2021] [Indexed: 01/10/2023]
Abstract
The knowledge of the fate of metal-containing nanoparticles in biological media in aqueous media is of utmost importance for the future use of these promising theranostic agents for clinical applications. A methodology based on the combination of TDA-ICP-MS and CE-ICP-MS was applied to study the degradation pathway of AGuIX, a phase 2 clinical ultrasmall gadolinium-containing nanoparticle. Nanoparticle size measurements and gadolinium speciation performed in different media (phosphate buffer, urine and serum) demonstrated an accelerated dissolution of AGuIX in serum, without any release of free gadolinium for each medium.
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Affiliation(s)
- Lucie Labied
- Université de Lyon, CNRS, Université Claude Bernard Lyon 1, Institut des Sciences Analytiques, UMR 5280, 69100, Villeurbanne, France; Institut Lumière Matière, Université Claude Bernard Lyon 1, CNRS UMR 5306, 69622, Villeurbanne, France
| | - Paul Rocchi
- Institut Lumière Matière, Université Claude Bernard Lyon 1, CNRS UMR 5306, 69622, Villeurbanne, France; NH TherAguix S.A.S., 29 Chemin du Vieux Chêne, 38240, Meylan, France
| | | | - Jérôme Randon
- Université de Lyon, CNRS, Université Claude Bernard Lyon 1, Institut des Sciences Analytiques, UMR 5280, 69100, Villeurbanne, France
| | - Olivier Tillement
- Institut Lumière Matière, Université Claude Bernard Lyon 1, CNRS UMR 5306, 69622, Villeurbanne, France
| | - Hervé Cottet
- IBMM, University of Montpellier, CNRS, ENSCM, Montpellier, France
| | - François Lux
- Institut Lumière Matière, Université Claude Bernard Lyon 1, CNRS UMR 5306, 69622, Villeurbanne, France; Institut Universitaire de France (IUF), Paris, France
| | - Agnès Hagège
- Université de Lyon, CNRS, Université Claude Bernard Lyon 1, Institut des Sciences Analytiques, UMR 5280, 69100, Villeurbanne, France.
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17
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Renard C, Leclercq L, Cottet H. Generation and characterization of air micro-bubbles in highly hydrophobic capillaries. Electrophoresis 2021; 43:767-775. [PMID: 34752637 DOI: 10.1002/elps.202100171] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Revised: 08/07/2021] [Accepted: 10/04/2021] [Indexed: 11/12/2022]
Abstract
The generation of air microbubbles in microfluidic systems or in capillaries could be of great interest for transportation (single cell analysis, organite transportation) or for liquid compartmentation. The physicochemical characterization of air bubbles and a better understanding of the process leading to bubble generation during electrophoresis is also interesting in a theoretical point of view. In this work, the generation of microbubbles on hydrophobic Glaco™ coated capillaries has been studied in water-based electrolyte. Air bubbles were generated at the detection window and the required experimental parameters for microbubbles generation have been identified. Generated bubbles migrated against the electroosmotic flow, as would do strongly negatively charged solutes, under constant electric field. They have been characterized in terms of dimensions, electrophoretic mobility, and apparent charge.
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Affiliation(s)
- Charly Renard
- IBMM, University of Montpellier, CNRS, ENSCM, Montpellier, France
| | - Laurent Leclercq
- IBMM, University of Montpellier, CNRS, ENSCM, Montpellier, France
| | - Hervé Cottet
- IBMM, University of Montpellier, CNRS, ENSCM, Montpellier, France
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18
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Al Hamoui Dit Banni G, Nasreddine R, Fayad S, Cao-Ngoc P, Rossi JC, Leclercq L, Cottet H, Marchal A, Nehmé R. Screening for pancreatic lipase natural modulators by capillary electrophoresis hyphenated to spectrophotometric and conductometric dual detection. Analyst 2021; 146:1386-1401. [PMID: 33404014 DOI: 10.1039/d0an02234a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The search for novel pancreatic lipase (PL) inhibitors has gained increasing attention in recent years. For the first time, a dual detection capillary electrophoresis (CE)-based homogeneous lipase assay was developed employing both the offline and online reaction modes. The hydrolysis of 4-nitrophenyl butyrate (4-NPB) catalyzed by PL into 4-nitrophenol and butyrate was monitored by spectrophotometric and conductimetric detection, respectively. The assays presented several advantages such as economy in consumption (few tens of nanoliters for online assays to few tens of microliters for offline assays), no modification of lipase, rapidity (<10 min) and versatility. Tris/MOPS (10 mM, pH 6.6) was used as the background electrolyte and the incubation buffer for enzymatic reactions. We confirmed that in the conditions of the study (small substrate 4-NPB, 37 °C, pH 6.6), the PL was active even in the absence of dipalmitoylphosphatidylcholine (DPPC) vesicles, generally used to mimic the lipid-water interface. This was confirmed by the maximum velocity (Vmax) and the Michaelis-Menten constant (Km) values that were the same order of magnitude in the absence and presence of DPPC. The developed method was used to screen crude aqueous plant extracts and purified compounds. We were able to identify the promising PL inhibition of hawthorn leaf herbal infusions at 1 mg mL-1 (37%) and PL activation by fresh and dry hawthorn flowers (∼24%). Additionally, two triterpenoids purified from extracts of oakwood were identified for the first time as potent PL inhibitors demonstrating 51 and 58% inhibition at 1 mg mL-1, respectively.
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Affiliation(s)
- Ghassan Al Hamoui Dit Banni
- Institut de Chimie Organique et Analytique (ICOA), CNRS FR 2708 - UMR 7311, Université d'Orléans, 45067 Orléans, France.
| | - Rouba Nasreddine
- Institut de Chimie Organique et Analytique (ICOA), CNRS FR 2708 - UMR 7311, Université d'Orléans, 45067 Orléans, France.
| | - Syntia Fayad
- Institut de Chimie Organique et Analytique (ICOA), CNRS FR 2708 - UMR 7311, Université d'Orléans, 45067 Orléans, France. and Université de Bordeaux, ISVV, EA 5477, Unité de recherche Œnologie, USC 1366 INRA, F-33882, Villenave d'Ornon, France
| | - Phu Cao-Ngoc
- IBMM, University of Montpellier, CNRS, ENSCM, 34059 Montpellier, France
| | | | - Laurent Leclercq
- IBMM, University of Montpellier, CNRS, ENSCM, 34059 Montpellier, France
| | - Hervé Cottet
- IBMM, University of Montpellier, CNRS, ENSCM, 34059 Montpellier, France
| | - Axel Marchal
- Université de Bordeaux, ISVV, EA 5477, Unité de recherche Œnologie, USC 1366 INRA, F-33882, Villenave d'Ornon, France
| | - Reine Nehmé
- Institut de Chimie Organique et Analytique (ICOA), CNRS FR 2708 - UMR 7311, Université d'Orléans, 45067 Orléans, France.
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19
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Malburet C, Leclercq L, Cotte JF, Thiebaud J, Marco S, Nicolaï MC, Cottet H. Antigen-Adjuvant Interactions in Vaccines by Taylor Dispersion Analysis: Size Characterization and Binding Parameters. Anal Chem 2021; 93:6508-6515. [PMID: 33861925 DOI: 10.1021/acs.analchem.1c00420] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Vaccine adjuvants are immunostimulatory substances used to improve and modulate the immune response induced by antigens. A better understanding of the antigen-adjuvant interactions is necessary to develop future effective vaccine. In this study, Taylor dispersion analysis (TDA) was successfully implemented to characterize the interactions between a polymeric adjuvant (poly(acrylic acid), SPA09) and a vaccine antigen in development for the treatment of Staphylococcus aureus. TDA allowed one to rapidly determine both (i) the size of the antigen-adjuvant complexes under physiological conditions and (ii) the percentage of free antigen in the adjuvant/antigen mixture at equilibrium and finally get the interaction parameters (stoichiometry and binding constant). The complex sizes obtained by TDA were compared to the results obtained by transmission electron microscopy, and the binding parameters were compared to results previously obtained by frontal analysis continuous capillary electrophoresis.
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Affiliation(s)
- Camille Malburet
- IBMM, University of Montpellier, CNRS, ENSCM, Place Eugène Bataillon, 34095 Montpellier, France.,Sanofi Pasteur, Analytical Sciences, 1541 Avenue Marcel Mérieux, 69280 Marcy l'Etoile, France
| | - Laurent Leclercq
- IBMM, University of Montpellier, CNRS, ENSCM, Place Eugène Bataillon, 34095 Montpellier, France
| | - Jean-François Cotte
- Sanofi Pasteur, Analytical Sciences, 1541 Avenue Marcel Mérieux, 69280 Marcy l'Etoile, France
| | - Jérôme Thiebaud
- Sanofi Pasteur, Analytical Sciences, 1541 Avenue Marcel Mérieux, 69280 Marcy l'Etoile, France
| | - Sergio Marco
- Sanofi Pasteur, Analytical Sciences, 1541 Avenue Marcel Mérieux, 69280 Marcy l'Etoile, France
| | - Marie-Claire Nicolaï
- Sanofi Pasteur, Analytical Sciences, 1541 Avenue Marcel Mérieux, 69280 Marcy l'Etoile, France
| | - Hervé Cottet
- IBMM, University of Montpellier, CNRS, ENSCM, Place Eugène Bataillon, 34095 Montpellier, France
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20
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Deleanu M, Hernandez JF, Cipelletti L, Biron JP, Rossi E, Taverna M, Cottet H, Chamieh J. Unraveling the Speciation of β-Amyloid Peptides during the Aggregation Process by Taylor Dispersion Analysis. Anal Chem 2021; 93:6523-6533. [PMID: 33852281 DOI: 10.1021/acs.analchem.1c00527] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Aggregation mechanisms of amyloid β peptides depend on multiple intrinsic and extrinsic physicochemical factors (e.g., peptide chain length, truncation, peptide concentration, pH, ionic strength, temperature, metal concentration, etc.). Due to this high number of parameters, the formation of oligomers and their propensity to aggregate make the elucidation of this physiopathological mechanism a challenging task. From the analytical point of view, up to our knowledge, few techniques are able to quantify, in real time, the proportion and the size of the different soluble species during the aggregation process. This work aims at demonstrating the efficacy of the modern Taylor dispersion analysis (TDA) performed in capillaries (50 μm i.d.) to unravel the speciation of β-amyloid peptides in low-volume peptide samples (∼100 μL) with an analysis time of ∼3 min per run. TDA was applied to study the aggregation process of Aβ(1-40) and Aβ(1-42) peptides at physiological pH and temperature, where more than 140 data points were generated with a total volume of ∼1 μL over the whole aggregation study (about 0.5 μg of peptides). TDA was able to give a complete and quantitative picture of the Aβ speciation during the aggregation process, including the sizing of the oligomers and protofibrils, the consumption of the monomer, and the quantification of different early- and late-formed aggregated species.
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Affiliation(s)
- Mihai Deleanu
- IBMM, ENSCM, Université Montpellier, CNRS, 34095 Montpellier, France
| | | | - Luca Cipelletti
- Laboratoire Charles Coulomb (L2C), Université Montpellier, CNRS, 34095 Montpellier, France.,Institut Universitaire de France (IUF), France
| | | | - Emilie Rossi
- , Université Paris-Saclay, CNRS, Institut Galien Paris-Saclay, 92296 Châtenay-Malabry, France
| | - Myriam Taverna
- Institut Universitaire de France (IUF), France.,, Université Paris-Saclay, CNRS, Institut Galien Paris-Saclay, 92296 Châtenay-Malabry, France
| | - Hervé Cottet
- IBMM, ENSCM, Université Montpellier, CNRS, 34095 Montpellier, France
| | - Joseph Chamieh
- IBMM, ENSCM, Université Montpellier, CNRS, 34095 Montpellier, France
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21
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Cao-Ngoc P, Leclercq L, Rossi JC, Hertzog J, Tixier AS, Chemat F, Nasreddine R, Al Hamoui Dit Banni G, Nehmé R, Schmitt-Kopplin P, Cottet H. Water-Based Extraction of Bioactive Principles from Blackcurrant Leaves and Chrysanthellum americanum: A Comparative Study. Foods 2020; 9:E1478. [PMID: 33081198 PMCID: PMC7602794 DOI: 10.3390/foods9101478] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Revised: 10/01/2020] [Accepted: 10/12/2020] [Indexed: 12/24/2022] Open
Abstract
The water-based extraction of bioactive components from flavonoid-rich medicinal plants is a key step that should be better investigated. This is especially true when dealing with easy-to-use home-made conditions of extractions, which are known to be a bottleneck in the course for a better control and optimization of the daily uptake of active components from medicinal plants. In this work, the water-based extraction of Blackcurrant (Ribes nigrum) leaves (BC) and Chrysanthellum americanum (CA), known to have complementary pharmacological properties, was studied and compared with a previous work performed on the extraction of Hawthorn (Crataegus, HAW). Various extraction modes in water (infusion, percolation, maceration, ultrasounds, microwaves) were compared for the extraction of bioactive principles contained in BC and CA in terms of extraction yield, of amount of flavonoids, phenolic compounds, and proanthocyanidin oligomers, and of UHPLC profiles of the extracted compounds. The qualitative and quantitative aspects of the extraction, in addition to the kinetic of extraction, were studied. The optimized easy-to-use-at-home extraction protocol developed for HAW was found very efficient to easily extract bioactive components from BC and CA plants. UHPLC-ESI-MS and high-resolution Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) were also implemented to get more qualitative information on the specific and common chemical compositions of the three plants (including HAW). Their antihyaluronidase, antioxidant, and antihypertensive activities were also determined and compared, demonstrating similar activities as the reference compound for some of these plants.
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Affiliation(s)
- Phu Cao-Ngoc
- IBMM, University of Montpellier, CNRS, ENSCM, 34093 Montpellier, France; (P.C.-N.); (J.-C.R.)
| | - Laurent Leclercq
- IBMM, University of Montpellier, CNRS, ENSCM, 34093 Montpellier, France; (P.C.-N.); (J.-C.R.)
| | - Jean-Christophe Rossi
- IBMM, University of Montpellier, CNRS, ENSCM, 34093 Montpellier, France; (P.C.-N.); (J.-C.R.)
| | - Jasmine Hertzog
- Analytical BioGeoChemistry, Helmholtz Zentrum Muenchen, 85764 Neuherberg, Germany; (J.H.); (P.S.-K.)
- Analytical Food Chemistry, Technische Universität Muenchen, 85354 Freising, Germany
| | - Anne-Sylvie Tixier
- GREEN Extraction Team, INRA, University of Avignon, 84916 Avignon, France; (A.-S.T.); (F.C.)
| | - Farid Chemat
- GREEN Extraction Team, INRA, University of Avignon, 84916 Avignon, France; (A.-S.T.); (F.C.)
| | - Rouba Nasreddine
- Institute of Organic and Analytical Chemistry (ICOA), CNRS, University of Orléans, 45067 Orléans, France; (R.N.); (G.A.H.D.B.); (R.N.)
| | - Ghassan Al Hamoui Dit Banni
- Institute of Organic and Analytical Chemistry (ICOA), CNRS, University of Orléans, 45067 Orléans, France; (R.N.); (G.A.H.D.B.); (R.N.)
| | - Reine Nehmé
- Institute of Organic and Analytical Chemistry (ICOA), CNRS, University of Orléans, 45067 Orléans, France; (R.N.); (G.A.H.D.B.); (R.N.)
| | - Philippe Schmitt-Kopplin
- Analytical BioGeoChemistry, Helmholtz Zentrum Muenchen, 85764 Neuherberg, Germany; (J.H.); (P.S.-K.)
- Analytical Food Chemistry, Technische Universität Muenchen, 85354 Freising, Germany
| | - Hervé Cottet
- IBMM, University of Montpellier, CNRS, ENSCM, 34093 Montpellier, France; (P.C.-N.); (J.-C.R.)
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22
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Malburet C, Leclercq L, Cotte JF, Thiebaud J, Cottet H. Study of Interactions between Antigens and Polymeric Adjuvants in Vaccines by Frontal Analysis Continuous Capillary Electrophoresis. Biomacromolecules 2020; 21:3364-3373. [PMID: 32609507 DOI: 10.1021/acs.biomac.0c00782] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Vaccine adjuvants are used to enhance the immune response induced by antigens that have insufficient immunostimulatory capabilities. The present work aims at developing a frontal analysis continuous capillary electrophoresis (FACCE) methodology for the study of antigen-adjuvant interactions in vaccine products. After method optimization using three cationic model proteins, namely lysozyme, cytochrome c, and ribonuclease A, FACCE was successfully implemented to quantify the free antigen and thus to determine the interaction parameters (stoichiometry and binding constant) between an anionic polymeric adjuvant (polyacrylic acid, SPA09) and a cationic vaccine antigen in development for the treatment for Staphylococcus aureus. The influence of the ionic strength of the medium on the interactions was investigated. A strong dependence of the binding parameters with the ionic strength was observed. The concentration of the polymeric adjuvant was also found to significantly modify the ionic strength of the formulation, the extent of which could be estimated and corrected.
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Affiliation(s)
- Camille Malburet
- IBMM, University of Montpellier, CNRS, ENSCM, Montpellier, France.,Analytical Sciences, Sanofi Pasteur, 1541 Avenue Marcel Mérieux, Marcy-l'Étoile 69280, France
| | - Laurent Leclercq
- IBMM, University of Montpellier, CNRS, ENSCM, Montpellier, France
| | - Jean-François Cotte
- Analytical Sciences, Sanofi Pasteur, 1541 Avenue Marcel Mérieux, Marcy-l'Étoile 69280, France
| | - Jérôme Thiebaud
- Analytical Sciences, Sanofi Pasteur, 1541 Avenue Marcel Mérieux, Marcy-l'Étoile 69280, France
| | - Hervé Cottet
- IBMM, University of Montpellier, CNRS, ENSCM, Montpellier, France
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23
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Jörgensen AM, Friedl JD, Wibel R, Chamieh J, Cottet H, Bernkop-Schnürch A. Cosolvents in Self-Emulsifying Drug Delivery Systems (SEDDS): Do They Really Solve Our Solubility Problems? Mol Pharm 2020; 17:3236-3245. [PMID: 32658482 PMCID: PMC7482394 DOI: 10.1021/acs.molpharmaceut.0c00343] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
![]()
The
aim of this study was to investigate the fate and the impact
of cosolvents in self-emulsifying drug delivery systems (SEDDS). Three
different SEDDS comprising the cosolvents DMSO (FD), ethanol
(FE), and benzyl alcohol (FBA) as well as the
corresponding formulations without these cosolvents (FD0, FE0, and FBA0) were developed. Mean droplet
size, polydispersity index (PDI), ζ potential, stability, and
emulsification time were determined. Cosolvent release studies were
performed via the dialysis membrane method and Taylor dispersion analysis
(TDA). Furthermore, the impact of cosolvent utilization on payloads
in SEDDS was examined using quinine as a model drug. SEDDS with and
without a cosolvent showed no significant differences in droplet size,
PDI, and ζ potential. The emulsification time was 3-fold (FD0), 80-fold (FE0), and 7-fold (FBA0)
longer due to the absence of the cosolvents. Release studies in demineralized
water provided evidence for an immediate and complete release of DMSO,
ethanol, and benzyl alcohol. TDA confirmed this result. Moreover,
a 1.4-fold (FD), 2.91-fold (FE), and 2.17-fold
(FBA) improved payload of the model drug quinine in the
selected SEDDS preconcentrates was observed that dropped after emulsification
within 1–5 h due to drug precipitation. In parallel, the quinine
concentrations decreased until reaching the same levels of the corresponding
SEDDS without cosolvents. Due to the addition of hydrophilic cosolvents,
the emulsifying properties of SEDDS are strongly improved. As hydrophilic
cosolvents are immediately released from SEDDS during the emulsification
process, however, their drug solubilizing properties in the resulting
oily droplets are very limited.
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Affiliation(s)
- Arne Matteo Jörgensen
- Department of Pharmaceutical Technology, Center for Chemistry and Biomedicine, University of Innsbruck, Institute of Pharmacy, 6020 Innsbruck, Austria
| | - Julian David Friedl
- Department of Pharmaceutical Technology, Center for Chemistry and Biomedicine, University of Innsbruck, Institute of Pharmacy, 6020 Innsbruck, Austria
| | - Richard Wibel
- Department of Pharmaceutical Technology, Center for Chemistry and Biomedicine, University of Innsbruck, Institute of Pharmacy, 6020 Innsbruck, Austria
| | - Joseph Chamieh
- IBMM, University of Montpellier, CNRS, ENSCM, 34095 Montpellier, France
| | - Hervé Cottet
- IBMM, University of Montpellier, CNRS, ENSCM, 34095 Montpellier, France
| | - Andreas Bernkop-Schnürch
- Department of Pharmaceutical Technology, Center for Chemistry and Biomedicine, University of Innsbruck, Institute of Pharmacy, 6020 Innsbruck, Austria
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24
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Stolz A, Hedeland Y, Salzer L, Römer J, Heiene R, Leclercq L, Cottet H, Bergquist J, Neusüß C. Capillary Zone Electrophoresis-Top-Down Tandem Mass Spectrometry for In-Depth Characterization of Hemoglobin Proteoforms in Clinical and Veterinary Samples. Anal Chem 2020; 92:10531-10539. [PMID: 32628011 DOI: 10.1021/acs.analchem.0c01350] [Citation(s) in RCA: 13] [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: 12/18/2022]
Abstract
Hemoglobin (Hb) constitutes an important protein in clinical diagnostics-both in humans and animals. Among the high number of sequence variants, some can cause severe diseases. Moreover, chemical modifications such as glycation and carbamylation serve as important biomarkers for conditions such as diabetes and kidney diseases. In clinical routine analysis of glycated Hb, sequence variants or other Hb proteoforms can cause interference, resulting in wrong quantification results. We present a versatile and flexible capillary zone electrophoresis-mass spectrometry screening method for Hb proteoforms including sequence variants and modified species extracted from dried blood spot (DBS) samples with virtually no sample preparation. High separation power was achieved by application of a 5-layers successive multiple ionic polymer layers-coated capillary, enabling separation of positional isomers of glycated α- and β-chains on the intact level. Quantification of glycated Hb was in good correlation with the results obtained in a clinical routine method. Identification and characterization of known and unknown proteoforms was performed by fragmentation of intact precursor ions. N-Terminal and lysine glycation could be identified on the α- and β-chain, respectively. The versatility of the method was demonstrated by application to dog and cat DBS samples. We discovered a putative new sequence variant of the β-chain in dog (T38 → A). The presented method enables separation, characterization, and quantification of intact proteoforms, including positional isomers of glycated species in a single run. Combined with the simple sample preparation, our method represents a valuable tool to be used for deeper characterization of clinical and veterinary samples.
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Affiliation(s)
- Alexander Stolz
- Department of Chemistry, Aalen University, Beethovenstraße 1, 73430 Aalen, Germany.,Department of Pharmaceutical and Medicinal Chemistry, Friedrich Schiller University Jena, 07743 Jena, Germany
| | - Ylva Hedeland
- Department of Medical Sciences, Clinical Chemistry, , Uppsala University Hospital, SE-751 24 Uppsala, Sweden
| | - Liesa Salzer
- Department of Chemistry, Aalen University, Beethovenstraße 1, 73430 Aalen, Germany
| | - Jennifer Römer
- Department of Chemistry, Aalen University, Beethovenstraße 1, 73430 Aalen, Germany.,Institute of Analytical Chemistry, Chemo-and Biosensors,University of Regensburg, 93053 Regensburg, Germany
| | | | - Laurent Leclercq
- IBMM, University of Montpellier, CNRS, ENSCM, Beethovenstraße 1, 34090 Montpellier, France
| | - Hervé Cottet
- IBMM, University of Montpellier, CNRS, ENSCM, Beethovenstraße 1, 34090 Montpellier, France
| | - Jonas Bergquist
- Department of Chemistry -Biomedical Center, Analytical Chemistry, Uppsala University, SE-751 24 Uppsala, Sweden
| | - Christian Neusüß
- Department of Chemistry, Aalen University, Beethovenstraße 1, 73430 Aalen, Germany
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Leclercq L, Renard C, Martin M, Cottet H. Quantification of Adsorption and Optimization of Separation of Proteins in Capillary Electrophoresis. Anal Chem 2020; 92:10743-10750. [DOI: 10.1021/acs.analchem.0c02012] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Laurent Leclercq
- IBMM, Université de Montpellier, CNRS, ENSCM, Montpellier 34095, France
| | - Charly Renard
- IBMM, Université de Montpellier, CNRS, ENSCM, Montpellier 34095, France
| | - Michel Martin
- PMMH, CNRS, ESPCI Paris − PSL, Sorbonne Université, Université de Paris, Paris 75005, France
| | - Hervé Cottet
- IBMM, Université de Montpellier, CNRS, ENSCM, Montpellier 34095, France
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26
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Phimphachanh A, Chamieh J, Leclercq L, Harrisson S, Destarac M, Lacroix-Desmazes P, Gérardin C, In M, Cottet H. Characterization of Diblock Copolymers by Capillary Electrophoresis: From Electrophoretic Mobility Distribution to Distribution of Composition. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b01978] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Anthony Phimphachanh
- L2C, Univ Montpellier, CNRS, Montpellier, France
- ICGM, Univ Montpellier, CNRS, ENSCM, Montpellier, France
| | - Joseph Chamieh
- IBMM, Univ Montpellier, CNRS, ENSCM, Montpellier, France
| | | | - Simon Harrisson
- IMRCP, University of Toulouse, CNRS UMR5623, Toulouse, France
| | | | | | | | - Martin In
- L2C, Univ Montpellier, CNRS, Montpellier, France
| | - Hervé Cottet
- IBMM, Univ Montpellier, CNRS, ENSCM, Montpellier, France
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27
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Renard C, Leclercq L, Stocco A, Cottet H. Superhydrophobic capillary coatings: Elaboration, characterization and application to electrophoretic separations. J Chromatogr A 2019; 1603:361-370. [DOI: 10.1016/j.chroma.2019.06.035] [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: 05/12/2019] [Revised: 06/10/2019] [Accepted: 06/12/2019] [Indexed: 11/25/2022]
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28
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Ibrahim A, Cottet H. Characterization of hydrosoluble fraction and oligomers in poly(vinylidene chloride) latexes by capillary electrophoresis using electrophoretic mobility modeling. J Chromatogr A 2019; 1598:223-231. [PMID: 31053352 DOI: 10.1016/j.chroma.2019.04.016] [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: 02/09/2019] [Revised: 04/06/2019] [Accepted: 04/08/2019] [Indexed: 11/28/2022]
Abstract
The characterization of hydrosoluble oligomers in latexes is an important topic in emulsion polymerization since oligomers are suspected to be responsible for latex destabilization. In this work, the hydrosoluble fraction of poly(vinylidene chloride) latexes synthesized by emulsion polymerization of three monomers (acrylic acid, methyl acrylate, vinylidene chloride) was characterized by capillary electrophoresis (CE). CE using direct UV detection permitted to estimate residual monomers and surfactants concentrations contained in the latexes serums. Water soluble oligomers, polymerization initiator (persulfate) and other inorganic anions were detected by indirect UV detection. The oligomers content in the dry extract of serum was estimated to be about 6% (% m/m) represented mainly by 9 different compounds belonging to 3 different families. Using a semi-empirical electrophoretic mobility modeling, the charge number of these oligomers was estimated to be -2 and the molar masses were estimated in the range of ∼300-550 g.mol-1. Oligomer samples obtained by surfactant-free polymerization, with different initial monomers proportions, provided qualitatively 14 different oligomers, including the 9 oligomers previously detected in the serums. Finally, the latex was characterized (electrophoretic mobility and zeta potential) using its serum as a background electrolyte. This approach could be very useful to study the behavior of the latexes, and possibly destabilization effect, in analytical conditions very close to its real environment / applications.
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Affiliation(s)
- Amal Ibrahim
- IBMM, University of Montpellier, CNRS, ENSCM, Montpellier, France
| | - Hervé Cottet
- IBMM, University of Montpellier, CNRS, ENSCM, Montpellier, France.
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29
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Leclercq L, Saetear P, Rolland-Sabaté A, Biron JP, Chamieh J, Cipelletti L, Bornhop DJ, Cottet H. Size-Based Characterization of Polysaccharides by Taylor Dispersion Analysis with Photochemical Oxidation or Backscattering Interferometry Detections. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b00605] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Laurent Leclercq
- IBMM, Université de Montpellier, CNRS, ENSCM, Montpellier 34095, France
| | - Phoonthawee Saetear
- IBMM, Université de Montpellier, CNRS, ENSCM, Montpellier 34095, France
- Department of Chemistry and the Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Rama 6 Road, Ratchathewi, Bangkok 10400, Thailand
| | - Agnès Rolland-Sabaté
- UR1268 Biopolymères Interactions Assemblages, INRA, F-44300 Nantes, France
- UMR0408 Sécurité et Qualité des Produits d’Origine Végétale, INRA, Université Avignon, F-84000 Avignon, France
| | | | - Joseph Chamieh
- IBMM, Université de Montpellier, CNRS, ENSCM, Montpellier 34095, France
| | - Luca Cipelletti
- L2C, Université de Montpellier, CNRS, Montpellier 34095, France
| | | | - Hervé Cottet
- IBMM, Université de Montpellier, CNRS, ENSCM, Montpellier 34095, France
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30
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Leclercq L, Morvan M, Koch J, Neusüß C, Cottet H. Modulation of the electroosmotic mobility using polyelectrolyte multilayer coatings for protein analysis by capillary electrophoresis. Anal Chim Acta 2019; 1057:152-161. [DOI: 10.1016/j.aca.2019.01.008] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Revised: 11/17/2018] [Accepted: 01/04/2019] [Indexed: 12/26/2022]
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31
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Desvignes I, Chamieh J, Cottet H. Separation and Characterization of Highly Charged Polyelectrolytes Using Free-Solution Capillary Electrophoresis. Polymers (Basel) 2018; 10:polym10121331. [PMID: 30961256 PMCID: PMC6401714 DOI: 10.3390/polym10121331] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Revised: 11/26/2018] [Accepted: 11/27/2018] [Indexed: 11/16/2022] Open
Abstract
The characterization of statistical copolymers of various charge densities remains an important and challenging analytical issue. Indeed, the polyelectrolyte (PE) effective electrophoretic mobility tends to level off above a certain charge density, due to the occurrence of Manning counterion condensation. Surprisingly, we demonstrate in this work that it is possible to get highly resolutive separations of charged PE using free-solution capillary electrophoresis, even above the critical value predicted by the Manning counterion condensation theory. Full separation of nine statistical poly(acrylamide-co-2-acrylamido-2-methylpropanesulfonate) polymers of different charge densities varying between 3% and 100% was obtained by adjusting the ionic strength of the background electrolyte (BGE) in counter electroosmotic mode. Distributions of the chemical charge density could be obtained for the nine PE samples, showing a strong asymmetry of the distribution for the highest-charged PE. This asymmetry can be explained by the different reactivity ratios during the copolymerization. To shed more light on the separation mechanism, effective and apparent selectivities were determined by a systematic study and modeling of the electrophoretic mobility dependence according to the ionic strength. It is demonstrated that the increase in resolution with increasing BGE ionic strength is not only due to a closer matching of the electroosmotic flow magnitude with the PE electrophoretic effective mobility, but also to an increase of the dependence of the PE effective mobility according to the charge density.
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Affiliation(s)
- Isabelle Desvignes
- Institut des Biomolécules Max Mousseron, University of Montpellier, CNRS, ENSCM, 34095 Montpellier, France.
| | - Joseph Chamieh
- Institut des Biomolécules Max Mousseron, University of Montpellier, CNRS, ENSCM, 34095 Montpellier, France.
| | - Hervé Cottet
- Institut des Biomolécules Max Mousseron, University of Montpellier, CNRS, ENSCM, 34095 Montpellier, France.
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32
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Chamieh J, Merdassi H, Rossi JC, Jannin V, Demarne F, Cottet H. Size characterization of lipid-based self-emulsifying pharmaceutical excipients during lipolysis using Taylor dispersion analysis with fluorescence detection. Int J Pharm 2018; 537:94-101. [DOI: 10.1016/j.ijpharm.2017.12.032] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2017] [Revised: 12/05/2017] [Accepted: 12/13/2017] [Indexed: 12/25/2022]
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33
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Lounis FM, Chamieh J, Leclercq L, Gonzalez P, Rossi JC, Cottet H. Effect of Dendrigraft Generation on the Interaction between Anionic Polyelectrolytes and Dendrigraft Poly(l-Lysine). Polymers (Basel) 2018; 10:E45. [PMID: 30966081 PMCID: PMC6415173 DOI: 10.3390/polym10010045] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2017] [Revised: 12/18/2017] [Accepted: 12/28/2017] [Indexed: 12/22/2022] Open
Abstract
In this present work, three generations of dendrigraft poly(l-Lysine) (DGL) were studied regarding their ability to interact with linear poly (acrylamide-co-2-acrylamido-2-methyl-1-propanesulfonate) (PAMAMPS) of different chemical charge densities (30% and 100%). Frontal analysis continuous capillary electrophoresis (FACCE) was successfully applied to determine binding constants and binding stoichiometries. The effect of DGL generation on the interaction was evaluated for the first three generations (G2, G3, and G4) at different ionic strengths, and the effect of ligand topology (linear PLL vs. dendrigraft DGL) on binding parameters was evaluated. An increase of the biding site constants accompanied with a decrease of the DGL-PAMAMPS (n:1) stoichiometry was observed for increasing DGL generation. The logarithm of the global binding constants decreased linearly with the logarithm of the ionic strength. This double logarithmic representation allowed determining the extent of counter-ions released from the association of DGL molecules onto one PAMAMPS chain that was compared to the total entropic reservoir constituted by the total number of condensed counter-ions before the association.
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Affiliation(s)
| | - Joseph Chamieh
- IBMM, Université de Montpellier, CNRS, ENSCM, 34095 Montpellier, France.
| | - Laurent Leclercq
- IBMM, Université de Montpellier, CNRS, ENSCM, 34095 Montpellier, France.
| | - Philippe Gonzalez
- IBMM, Université de Montpellier, CNRS, ENSCM, 34095 Montpellier, France.
| | | | - Hervé Cottet
- IBMM, Université de Montpellier, CNRS, ENSCM, 34095 Montpellier, France.
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34
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Chamieh J, Leclercq L, Martin M, Slaoui S, Jensen H, Østergaard J, Cottet H. Limits in Size of Taylor Dispersion Analysis: Representation of the Different Hydrodynamic Regimes and Application to the Size-Characterization of Cubosomes. Anal Chem 2017; 89:13487-13493. [DOI: 10.1021/acs.analchem.7b03806] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Joseph Chamieh
- IBMM, Université de Montpellier, CNRS, ENSCM, Montpellier 34095, France
| | - Laurent Leclercq
- IBMM, Université de Montpellier, CNRS, ENSCM, Montpellier 34095, France
| | - Michel Martin
- Laboratoire
de Physique et Mécanique des Milieux Hétérogènes
(PMMH), ESPCI Paris, CNRS, PSL (Paris Sciences et Lettres) Research University, Sorbonne Université, Université Paris-Diderot, 10 rue
Vauquelin, 75231 Paris Cedex 05, France
| | - Sofia Slaoui
- Department
of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen 2100, Denmark
- IUT
Montpellier-Sète, Université de Montpellier, Montpellier 34296, France
| | - Henrik Jensen
- Department
of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen 2100, Denmark
| | - Jesper Østergaard
- Department
of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen 2100, Denmark
| | - Hervé Cottet
- IBMM, Université de Montpellier, CNRS, ENSCM, Montpellier 34095, France
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35
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Saetear P, Chamieh J, Kammer MN, Manuel TJ, Biron JP, Bornhop DJ, Cottet H. Taylor Dispersion Analysis of Polysaccharides Using Backscattering Interferometry. Anal Chem 2017; 89:6710-6718. [DOI: 10.1021/acs.analchem.7b00946] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
| | - Joseph Chamieh
- IBMM, Univ. Montpellier,
CNRS, ENSCM, Montpellier, France
| | - Michael N. Kammer
- Department
of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, United States
- The
Vanderbilt Institute for Chemical Biology, Vanderbilt University, Nashville, Tennessee 37235, United States
| | - Thomas J. Manuel
- Department
of Agricultural and Biological Engineering, Mississippi State University, Starkville, Mississippi 39762, United States
| | | | - Darryl J. Bornhop
- Department
of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, United States
- The
Vanderbilt Institute for Chemical Biology, Vanderbilt University, Nashville, Tennessee 37235, United States
| | - Hervé Cottet
- IBMM, Univ. Montpellier,
CNRS, ENSCM, Montpellier, France
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36
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Lounis FM, Chamieh J, Leclercq L, Gonzalez P, Geneste A, Prelot B, Cottet H. Interactions between Oppositely Charged Polyelectrolytes by Isothermal Titration Calorimetry: Effect of Ionic Strength and Charge Density. J Phys Chem B 2017; 121:2684-2694. [DOI: 10.1021/acs.jpcb.6b11907] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Feriel Meriem Lounis
- Institut
des Biomolécules Max Mousseron (IBMM), UMR 5247 CNRS, Université de Montpellier, Ecole Nationale Supérieure de Chimie de Montpellier, Place Eugène Bataillon, CC
1706, 34095 Montpellier
Cedex 5, France
| | - Joseph Chamieh
- Institut
des Biomolécules Max Mousseron (IBMM), UMR 5247 CNRS, Université de Montpellier, Ecole Nationale Supérieure de Chimie de Montpellier, Place Eugène Bataillon, CC
1706, 34095 Montpellier
Cedex 5, France
| | - Laurent Leclercq
- Institut
des Biomolécules Max Mousseron (IBMM), UMR 5247 CNRS, Université de Montpellier, Ecole Nationale Supérieure de Chimie de Montpellier, Place Eugène Bataillon, CC
1706, 34095 Montpellier
Cedex 5, France
| | - Philippe Gonzalez
- Institut
des Biomolécules Max Mousseron (IBMM), UMR 5247 CNRS, Université de Montpellier, Ecole Nationale Supérieure de Chimie de Montpellier, Place Eugène Bataillon, CC
1706, 34095 Montpellier
Cedex 5, France
| | - Amine Geneste
- Institut
Charles Gerhardt de Montpellier, UMR 5253 CNRS-UM-ENSCM, Université de Montpellier, CC1502, Place Eugène Bataillon, 34095 Montpellier, France
| | - Benedicte Prelot
- Institut
Charles Gerhardt de Montpellier, UMR 5253 CNRS-UM-ENSCM, Université de Montpellier, CC1502, Place Eugène Bataillon, 34095 Montpellier, France
| | - Hervé Cottet
- Institut
des Biomolécules Max Mousseron (IBMM), UMR 5247 CNRS, Université de Montpellier, Ecole Nationale Supérieure de Chimie de Montpellier, Place Eugène Bataillon, CC
1706, 34095 Montpellier
Cedex 5, France
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37
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Lounis FM, Chamieh J, Leclercq L, Gonzalez P, Cottet H. The Effect of Molar Mass and Charge Density on the Formation of Complexes between Oppositely Charged Polyelectrolytes. Polymers (Basel) 2017; 9:polym9020050. [PMID: 30970728 PMCID: PMC6432040 DOI: 10.3390/polym9020050] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2016] [Revised: 01/11/2017] [Accepted: 01/19/2017] [Indexed: 12/17/2022] Open
Abstract
The interactions between model polyanions and polycations have been studied using frontal continuous capillary electrophoresis (FACCE) which allows the determination of binding stoichiometry and binding constant of the formed polyelectrolyte complex (PEC). In this work, the effect of the poly(l-lysine) (PLL) molar mass on the interaction with statistical copolymers of acrylamide and 2-acrylamido-2-methyl-1-propanesulfonate (PAMAMPS) has been systematically investigated for different PAMAMPS chemical charge densities (15% and 100%) and different ionic strengths. The study of the ionic strength dependence of the binding constant allowed the determination of the total number of released counter-ions during the formation of the PEC, which can be compared to the total number of counter-ions initially condensed on the individual polyelectrolyte partners before the association. Interestingly, this fraction of released counter-ions, which was strongly dependent on the PLL molar mass, was almost independent of the PAMAMPS charge density. These findings are useful to predict the binding constant according to the molar mass and charge density of the polyelectrolyte partners.
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Affiliation(s)
- Feriel Meriem Lounis
- Institut des Biomolécules Max Mousseron, IBMM, UMR 5247 CNRS, Université de Montpellier, Ecole Nationale Supérieure de Chimie de Montpellier, Place Eugène Bataillon, CC 1706, 34095 Montpellier CEDEX 5, France.
| | - Joseph Chamieh
- Institut des Biomolécules Max Mousseron, IBMM, UMR 5247 CNRS, Université de Montpellier, Ecole Nationale Supérieure de Chimie de Montpellier, Place Eugène Bataillon, CC 1706, 34095 Montpellier CEDEX 5, France.
| | - Laurent Leclercq
- Institut des Biomolécules Max Mousseron, IBMM, UMR 5247 CNRS, Université de Montpellier, Ecole Nationale Supérieure de Chimie de Montpellier, Place Eugène Bataillon, CC 1706, 34095 Montpellier CEDEX 5, France.
| | - Philippe Gonzalez
- Institut des Biomolécules Max Mousseron, IBMM, UMR 5247 CNRS, Université de Montpellier, Ecole Nationale Supérieure de Chimie de Montpellier, Place Eugène Bataillon, CC 1706, 34095 Montpellier CEDEX 5, France.
| | - Hervé Cottet
- Institut des Biomolécules Max Mousseron, IBMM, UMR 5247 CNRS, Université de Montpellier, Ecole Nationale Supérieure de Chimie de Montpellier, Place Eugène Bataillon, CC 1706, 34095 Montpellier CEDEX 5, France.
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38
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Stock LG, Leitner M, Traxler L, Bonazza K, Leclercq L, Cottet H, Friedbacher G, Ebner A, Stutz H. Advanced portrayal of SMIL coating by allying CZE performance with in-capillary topographic and charge-related surface characterization. Anal Chim Acta 2017; 951:1-15. [DOI: 10.1016/j.aca.2016.10.030] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Accepted: 10/22/2016] [Indexed: 10/20/2022]
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39
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Cottet H, Wu H, Allison SA. On the ionic strength dependence of the electrophoretic mobility: From 2D to 3D slope-plots. Electrophoresis 2016; 38:624-632. [PMID: 27859393 DOI: 10.1002/elps.201600329] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [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: 07/16/2016] [Revised: 11/02/2016] [Accepted: 11/02/2016] [Indexed: 11/12/2022]
Abstract
Determining the charge and the nature (small ion, nanoparticle, or polyelectrolyte) of an unknown solute from its electrophoretic characteristics remains a challenging issue. In this work, we demonstrate that, if the knowledge of the effective electrophoretic mobility (μep ) at a given ionic strength is not sufficient to characterize a given solute, the combination of this parameter with (i) the relative decrease of the electrophoretic mobility with the ionic strength (S), and (ii) the hydrodynamic radius (Rh ), is sufficient (in most cases) to deduce the nature of the solute and its charge. These three parameters are experimentally accessible by CZE and Taylor dispersion analysis performed on the same instrumentation. 3D representation of the three aforementioned parameters (μep ; S and Rh ) is proposed to visualize the differences in the electrophoretic behavior between solutes according to their charge and nature. Surprisingly, such 3D slope plot in the case of small ions and nanoparticles looks like a "whale-tail," while polyelectrolyte contour plot represents a rather simple and monotonous map that is independent of solute size. This work also sets how to estimate the effective charge of a solute from a given experimental (S,Rh,μ ep 5 mM ) triplet, which is not possible to obtain unambiguously with only (Rh,μ ep 5 mM ) or (S,μ ep 5 mM ) doublet, where μ ep 5 mM is the effective electrophoretic mobility at 5 mM ionic strength.
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Affiliation(s)
- Hervé Cottet
- Institut des Biomolécules Max Mousseron, (UMR 5247 CNRS, Université de Montpellier, Ecole Nationale Supérieure de Chimie de Montpellier), Montpellier, France
| | - Hengfu Wu
- Department of Chemistry, Georgia State University, Atlanta, Georgia, USA
| | - Stuart A Allison
- Department of Chemistry, Georgia State University, Atlanta, Georgia, USA
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40
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Lounis FM, Chamieh J, Leclercq L, Gonzalez P, Cottet H. Modelling and predicting the interactions between oppositely and variously charged polyelectrolytes by frontal analysis continuous capillary electrophoresis. Soft Matter 2016; 12:9728-9737. [PMID: 27858039 DOI: 10.1039/c6sm01811d] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In this work, a systematic study of the interactions between poly(l-lysine) and variously charged statistical copolymers of acrylamide and 2-acrylamido-2-methyl-1-propanesulfonate (PAMAMPS) has been carried out by frontal analysis continuous capillary electrophoresis (FACCE). FACCE was successfully implemented to obtain the interaction parameters (binding constant and stoichiometry) at different ionic strengths and for different PAMAMPS charge densities varying between 15% and 100%. The range of investigated ionic strengths was carefully adjusted according to the PAMAMPS charge density to obtain measurable binding constants by FACCE (i.e. formation binding constant typically comprised between 104 and 106 M-1). The number of released counter-ions during the polyelectrolyte complex formation was systematically quantified via the ionic strength dependence of the binding constant and was compared to the total condensed counter-ion reservoir according to Manning theory on counter-ion condensation. A descriptive and predictive model relating the physico-chemical properties of the two partners, the binding constant and the ionic strength is proposed in the framework of multiple independent interaction sites of equal energy.
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Affiliation(s)
- Feriel Meriem Lounis
- Institut des Biomolécules Max Mousseron, IBMM, UMR 5247 CNRS, Université de Montpellier, Ecole Nationale Supérieure de Chimie de Montpellier, Place Eugène Bataillon, CC 1706, 34095 Montpellier Cedex 5, France.
| | - Joseph Chamieh
- Institut des Biomolécules Max Mousseron, IBMM, UMR 5247 CNRS, Université de Montpellier, Ecole Nationale Supérieure de Chimie de Montpellier, Place Eugène Bataillon, CC 1706, 34095 Montpellier Cedex 5, France.
| | - Laurent Leclercq
- Institut des Biomolécules Max Mousseron, IBMM, UMR 5247 CNRS, Université de Montpellier, Ecole Nationale Supérieure de Chimie de Montpellier, Place Eugène Bataillon, CC 1706, 34095 Montpellier Cedex 5, France.
| | - Philippe Gonzalez
- Institut des Biomolécules Max Mousseron, IBMM, UMR 5247 CNRS, Université de Montpellier, Ecole Nationale Supérieure de Chimie de Montpellier, Place Eugène Bataillon, CC 1706, 34095 Montpellier Cedex 5, France.
| | - Hervé Cottet
- Institut des Biomolécules Max Mousseron, IBMM, UMR 5247 CNRS, Université de Montpellier, Ecole Nationale Supérieure de Chimie de Montpellier, Place Eugène Bataillon, CC 1706, 34095 Montpellier Cedex 5, France.
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41
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Gonzalez P, Leclercq L, Cottet H. What is the Contribution of Counter-Ions to the Absolute Molar Mass of Polyelectrolytes Determined by SEC-MALLS? MACROMOL CHEM PHYS 2016. [DOI: 10.1002/macp.201600295] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Philippe Gonzalez
- Institut des Biomolécules Max Mousseron (IBMM, UMR 5247 CNRS-Université de Montpellier Ecole Nationale Supérieure de Chimie de Montpellier); Place Eugène Bataillon; CC 1706 34095 Montpellier France
| | - Laurent Leclercq
- Institut des Biomolécules Max Mousseron (IBMM, UMR 5247 CNRS-Université de Montpellier Ecole Nationale Supérieure de Chimie de Montpellier); Place Eugène Bataillon; CC 1706 34095 Montpellier France
| | - Hervé Cottet
- Institut des Biomolécules Max Mousseron (IBMM, UMR 5247 CNRS-Université de Montpellier Ecole Nationale Supérieure de Chimie de Montpellier); Place Eugène Bataillon; CC 1706 34095 Montpellier France
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42
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Chamieh J, Jannin V, Demarne F, Cottet H. Hydrodynamic size characterization of a self-emulsifying lipid pharmaceutical excipient by Taylor dispersion analysis with fluorescent detection. Int J Pharm 2016; 513:262-269. [DOI: 10.1016/j.ijpharm.2016.09.016] [Citation(s) in RCA: 12] [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: 07/12/2016] [Revised: 09/02/2016] [Accepted: 09/05/2016] [Indexed: 11/15/2022]
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Leitner M, Stock LG, Traxler L, Leclercq L, Bonazza K, Friedbacher G, Cottet H, Stutz H, Ebner A. Mapping molecular adhesion sites inside SMIL coated capillaries using atomic force microscopy recognition imaging. Anal Chim Acta 2016; 930:39-48. [PMID: 27265903 DOI: 10.1016/j.aca.2016.05.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [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: 12/03/2015] [Revised: 04/29/2016] [Accepted: 05/01/2016] [Indexed: 10/21/2022]
Abstract
Capillary zone electrophoresis (CZE) is a powerful analytical technique for fast and efficient separation of different analytes ranging from small inorganic ions to large proteins. However electrophoretic resolution significantly depends on the coating of the inner capillary surface. High technical efforts like Successive Multiple Ionic Polymer Layer (SMIL) generation have been taken to develop stable coatings with switchable surface charges fulfilling the requirements needed for optimal separation. Although the performance can be easily proven in normalized test runs, characterization of the coating itself remains challenging. Atomic force microscopy (AFM) allows for topographical investigation of biological and analytical relevant surfaces with nanometer resolution and yields information about the surface roughness and homogeneity. Upgrading the scanning tip to a molecular biosensor by adhesive molecules (like partly inverted charged molecules) allows for performing topography and recognition imaging (TREC). As a result, simultaneously acquired sample topography and adhesion maps can be recorded. We optimized this technique for electrophoresis capillaries and investigated the charge distribution of differently composed and treated SMIL coatings. By using the positively charged protein avidin as a single molecule sensor, we compared these SMIL coatings with respect to negative charges, resulting in adhesion maps with nanometer resolution. The capability of TREC as a functional investigation technique at the nanoscale was successfully demonstrated.
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Affiliation(s)
- Michael Leitner
- Institute of Biophysics, Johannes Kepler University Linz, Gruberstrasse 40, 4020 Linz, Austria
| | - Lorenz G Stock
- Division of Chemistry and Bioanalytics, Department of Molecular Biology, University Salzburg, Hellbrunnerstrasse 34, 5020 Salzburg, Austria; Christian Doppler Laboratory for Innovative Tools for the Characterization of Biosimilars, University Salzburg, Hellbrunnerstrasse 34, 5020 Salzburg, Austria
| | - Lukas Traxler
- Institute of Biophysics, Johannes Kepler University Linz, Gruberstrasse 40, 4020 Linz, Austria
| | - Laurent Leclercq
- Institut des Biomolécules Max Mousseron (IBMM, UMR 5247, CNRS, Université de Montpellier, Ecole Nationale Supérieure de Chimie de Montpellier), Place Eugène Bataillon, CC 1706, 34095 Montpellier, France
| | - Klaus Bonazza
- Institute of Chemical Technologies and Analytics, Vienna University of Technology, Getreidemarkt 9/164, 1060 Vienna, Austria
| | - Gernot Friedbacher
- Institute of Chemical Technologies and Analytics, Vienna University of Technology, Getreidemarkt 9/164, 1060 Vienna, Austria
| | - Hervé Cottet
- Institut des Biomolécules Max Mousseron (IBMM, UMR 5247, CNRS, Université de Montpellier, Ecole Nationale Supérieure de Chimie de Montpellier), Place Eugène Bataillon, CC 1706, 34095 Montpellier, France
| | - Hanno Stutz
- Division of Chemistry and Bioanalytics, Department of Molecular Biology, University Salzburg, Hellbrunnerstrasse 34, 5020 Salzburg, Austria; Christian Doppler Laboratory for Innovative Tools for the Characterization of Biosimilars, University Salzburg, Hellbrunnerstrasse 34, 5020 Salzburg, Austria
| | - Andreas Ebner
- Institute of Biophysics, Johannes Kepler University Linz, Gruberstrasse 40, 4020 Linz, Austria.
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44
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Lounis FM, Chamieh J, Gonzalez P, Cottet H, Leclercq L. Prediction of Polyelectrolyte Complex Stoichiometry for Highly Hydrophilic Polyelectrolytes. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b00463] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Feriel Meriem Lounis
- Institut
des Biomolécules
Max Mousseron, IBMM, UMR 5247 CNRS, Université de Montpellier, Ecole Nationale Supérieure de Chimie de Montpellier, Place Eugène Bataillon, CC
1706, 34095 Montpellier
Cedex 5, France
| | - Joseph Chamieh
- Institut
des Biomolécules
Max Mousseron, IBMM, UMR 5247 CNRS, Université de Montpellier, Ecole Nationale Supérieure de Chimie de Montpellier, Place Eugène Bataillon, CC
1706, 34095 Montpellier
Cedex 5, France
| | - Philippe Gonzalez
- Institut
des Biomolécules
Max Mousseron, IBMM, UMR 5247 CNRS, Université de Montpellier, Ecole Nationale Supérieure de Chimie de Montpellier, Place Eugène Bataillon, CC
1706, 34095 Montpellier
Cedex 5, France
| | - Hervé Cottet
- Institut
des Biomolécules
Max Mousseron, IBMM, UMR 5247 CNRS, Université de Montpellier, Ecole Nationale Supérieure de Chimie de Montpellier, Place Eugène Bataillon, CC
1706, 34095 Montpellier
Cedex 5, France
| | - Laurent Leclercq
- Institut
des Biomolécules
Max Mousseron, IBMM, UMR 5247 CNRS, Université de Montpellier, Ecole Nationale Supérieure de Chimie de Montpellier, Place Eugène Bataillon, CC
1706, 34095 Montpellier
Cedex 5, France
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45
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Affiliation(s)
- Valentin Roger
- Laboratoire
Charles Coulomb (L2C), UMR 5221 CNRS, Universiy of Montpellier, 34095 Montpellier, France
| | - Hervé Cottet
- Institut
des Biomolécules Max Mousseron (IBMM), UMR 5247 CNRS, University of Montpellier, Ecole Nationale Supérieure de Chimie de
Montpellier, 34095 Montpellier, France
| | - Luca Cipelletti
- Laboratoire
Charles Coulomb (L2C), UMR 5221 CNRS, Universiy of Montpellier, 34095 Montpellier, France
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46
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Thevarajah JJ, Sutton AT, Maniego AR, Whitty EG, Harrisson S, Cottet H, Castignolles P, Gaborieau M. Quantifying the Heterogeneity of Chemical Structures in Complex Charged Polymers through the Dispersity of Their Distributions of Electrophoretic Mobilities or of Compositions. Anal Chem 2016; 88:1674-81. [PMID: 26674535 DOI: 10.1021/acs.analchem.5b03672] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The complexity of synthetic and natural polymers used in industrial and medical applications is expanding; thus, it becomes increasingly important to improve and develop methods for their molecular characterization. Free-solution capillary electrophoresis is a robust technique for the separation and characterization of both natural and synthetic complex charged polymers. In the case of polyelectrolytes, free-solution capillary electrophoresis is in the "critical conditions" (CE-CC): it allows their separation by factors other than molar mass for molar masses typically higher than 20000 g/mol. This method is thus complementary to size-exclusion chromatography (SEC). SEC is widely used to determine molar mass distributions and their dispersities. Utilizing CE-CC, an analogous calculation of dispersity based on the distributions of electrophoretic mobilities was derived and the heterogeneity of composition or branching in different polysaccharides or synthetic polymers was obtained in a number of experimental cases. Calculations are based on a ratio of moments and could therefore be compared to simulations of polymerization processes, in analogy to the work performed on molar mass distributions. Among four possible types of dispersity, the most precise values were obtained with the calculation analogous with the dispersity of molar mass distribution Mw/Mn. In addition, the dispersity value allows conclusions based on a single value: the closer the dispersity is to 1, the more homogeneous the polymer is in terms of composition or branching. This approach allows the analysis of dispersity of important molecular attributes of polymers other than molar mass and aims at improving the overall molecular characterization of both synthetic and natural polymers. The dispersity can also be monitored online while performing a chemical reaction within the CE instrument.
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Affiliation(s)
| | | | | | | | - Simon Harrisson
- IMRCP, UMR 5623, Université de Toulouse, 118 route de Narbonne, F-31062 Toulouse Cedex 9, France
| | - Hervé Cottet
- Institut des Biomolécules Max Mousseron (IBMM, UMR 5247 CNRS, Université de Montpellier, Ecole Nationale Supérieure de Chimie de Montpellier), Place Eugène Bataillon CC 1706, 34095 Montpellier Cedex 5, France
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47
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Affiliation(s)
- Joseph Chamieh
- Institut des Biomolécules
Max Mousseron (IBMM, UMR 5247 CNRS, Université de Montpellier,
Ecole Nationale Supérieure de Chimie de Montpellier), Campus Triolet, Place Eugène Bataillon,
CC 1706, 34095 Montpellier
Cedex 5, France
| | - Jean Philippe Biron
- Institut des Biomolécules
Max Mousseron (IBMM, UMR 5247 CNRS, Université de Montpellier,
Ecole Nationale Supérieure de Chimie de Montpellier), Campus Triolet, Place Eugène Bataillon,
CC 1706, 34095 Montpellier
Cedex 5, France
| | - Luca Cipelletti
- Laboratoire Charles
Coulomb (L2C), UMR 5221 CNRS, Université de Montpellier, Montpellier, F-France
| | - Hervé Cottet
- Institut des Biomolécules
Max Mousseron (IBMM, UMR 5247 CNRS, Université de Montpellier,
Ecole Nationale Supérieure de Chimie de Montpellier), Campus Triolet, Place Eugène Bataillon,
CC 1706, 34095 Montpellier
Cedex 5, France
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48
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Oukacine F, Morel A, Desvignes I, Cottet H. Size-based characterization of nanoparticle mixtures by the inline coupling of capillary electrophoresis to Taylor dispersion analysis. J Chromatogr A 2015; 1426:220-5. [PMID: 26653841 DOI: 10.1016/j.chroma.2015.11.024] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [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: 08/18/2015] [Revised: 11/04/2015] [Accepted: 11/05/2015] [Indexed: 10/22/2022]
Abstract
Separation of closely related nanoparticles is still a challenging issue for the characterization of complex mixtures for industrial/research applications or regulatory purposes. In this work, the remarkable separating performances of CE were complemented with the absolute size-based determination provided by Taylor dispersion analysis (TDA) for the characterization of nanoparticle mixtures. The inline hyphenation of CE to TDA was successfully implemented for the baseline separation followed by a size-based characterization of a bimodal mixture containing two closely size-related nanolatexes (70nm and 56nm radii). A pixel sensor UV area imager providing three detection points along the capillary was used for a differential measurement of the peak broadening during the Taylor dispersion step. Comparison of this new technique with dynamic light scattering and hydrodynamic chromatography is also discussed.
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Affiliation(s)
- Farid Oukacine
- Université Grenoble Alpes, DPM UMR 5063, CNRS, F-38041 Grenoble, France
| | | | - Isabelle Desvignes
- Institut des Biomolécules Max Mousseron (IBMM, UMR 5247 CNRS, Université de Montpellier, Ecole Nationale Supérieure de Chimie de Montpellier), Place Eugène Bataillon, CC 1706, 34095 Montpellier Cedex 5, France
| | - Hervé Cottet
- Institut des Biomolécules Max Mousseron (IBMM, UMR 5247 CNRS, Université de Montpellier, Ecole Nationale Supérieure de Chimie de Montpellier), Place Eugène Bataillon, CC 1706, 34095 Montpellier Cedex 5, France.
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49
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Affiliation(s)
- Laurent Leclercq
- Institut
des Biomolécules Max Mousseron (IBMM, UMR 5247 CNRS, Ecole
Nationale Supérieure de Chimie de Montpellier), Université de Montpellier, Place Eugène Bataillon, CC 1706, 34095 Montpellier, Cedex 5, France
| | | | - Joseph Chamieh
- Institut
des Biomolécules Max Mousseron (IBMM, UMR 5247 CNRS, Ecole
Nationale Supérieure de Chimie de Montpellier), Université de Montpellier, Place Eugène Bataillon, CC 1706, 34095 Montpellier, Cedex 5, France
| | | | | | - Hervé Cottet
- Institut
des Biomolécules Max Mousseron (IBMM, UMR 5247 CNRS, Ecole
Nationale Supérieure de Chimie de Montpellier), Université de Montpellier, Place Eugène Bataillon, CC 1706, 34095 Montpellier, Cedex 5, France
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50
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Cipelletti L, Biron JP, Martin M, Cottet H. Measuring Arbitrary Diffusion Coefficient Distributions of Nano-Objects by Taylor Dispersion Analysis. Anal Chem 2015; 87:8489-96. [DOI: 10.1021/acs.analchem.5b02053] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Luca Cipelletti
- Laboratoire
Charles Coulomb (L2C), UMR 5221 CNRS, Université de Montpellier, Montpellier, France
| | - Jean-Philippe Biron
- Institut des Biomolécules
Max Mousseron (IBMM, UMR 5247 CNRS, Université de Montpellier,
Ecole Nationale Supérieure de Chimie de Montpellier), Campus Triolet, Place Eugène Bataillon,
CC 1706, 34095 Montpellier
Cedex 5, France
| | - Michel Martin
- Ecole Supérieure
de Physique et de Chimie Industrielles, Laboratoire de Physique et
Mécanique des Milieux Hétérogènes (PMMH,
UMR 7636 CNRS, ESPCI-ParisTech, Université Pierre et Marie
Curie, Université Paris-Diderot), 10 rue Vauquelin, 75231 Paris Cedex 05, France
| | - Hervé Cottet
- Institut des Biomolécules
Max Mousseron (IBMM, UMR 5247 CNRS, Université de Montpellier,
Ecole Nationale Supérieure de Chimie de Montpellier), Campus Triolet, Place Eugène Bataillon,
CC 1706, 34095 Montpellier
Cedex 5, France
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