1
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Lapenna A, Dagallier C, Huille S, Tribet C. Poly(glutamic acid)-Based Viscosity Reducers for Concentrated Formulations of a Monoclonal IgG Antibody. Mol Pharm 2024; 21:982-991. [PMID: 38240032 PMCID: PMC10849046 DOI: 10.1021/acs.molpharmaceut.3c01159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Accepted: 01/08/2024] [Indexed: 02/06/2024]
Abstract
Above a concentration threshold, the viscosity of solutions of proteins increases abruptly, which hampers the injectability of therapeutic formulations. Concentrations above 200 g/L are an ideal goal for subcutaneous application of antibodies. Molecular additives, such as amino acids (e.g., arginine) help decrease the viscosity, but they are used at concentrations as high as about 200 mmol/L. We addressed the question of whether poly(amino acids) could be more efficient than small molecular additives. We observed marked fluidification of a model therapeutic monoclonal antibody (mAb) solution by poly(d,l-glutamic acid) and poly(l-glutamic acid) derivatives added at concentrations of <6.5 g/L (i.e., a mAb/polymer chain molar ratio between 4:1 and 1:1 mol/mol). The bare poly(glutamate) parent chains were compared with polyethylene glycol-grafted chains as PEGylation is a common way to enhance stability. Viscosity could be decreased to ∼20 mPa s as compared to values of ∼100 mPa s in the absence of polymers at 200 g/L mAb. Formation of complexes between the mAb and the polyglutamates was characterized by capillary electrophoresis analysis in dilute solutions (1 g/L mAb) and by observation of phase separation at higher concentrations, suggesting tight association at about 2:1 mol/mol mAb/polymer. Altogether, these results show that polyglutamate derivatives hold an untapped potential as an excipient for fluidification of concentrated protein solutions.
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Affiliation(s)
- Annamaria Lapenna
- Département
de Chimie, PASTEUR, École Normale Supérieure, PSL University, Sorbonne Université, CNRS, Paris 75005, France
| | - Camille Dagallier
- Biologics
Formulation & Process Development, Biologics
Drug Product Development Department, SANOFI R&D, 13 quai Jules Guesde- BP 14, Vitry-sur-Seine 94403, France
| | - Sylvain Huille
- Biologics
Formulation & Process Development, Biologics
Drug Product Development Department, SANOFI R&D, 13 quai Jules Guesde- BP 14, Vitry-sur-Seine 94403, France
| | - Christophe Tribet
- Département
de Chimie, PASTEUR, École Normale Supérieure, PSL University, Sorbonne Université, CNRS, Paris 75005, France
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2
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Sixdenier L, Baffou G, Tribet C, Marie E. Quantitative Microscale Thermometry in Droplets Loaded with Gold Nanoparticles. J Phys Chem Lett 2023:11200-11207. [PMID: 38055870 DOI: 10.1021/acs.jpclett.3c02550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/08/2023]
Abstract
Gold nanoparticles (AuNPs) are increasingly used for their thermoplasmonic properties, i.e., their ability to convert light energy into heat through plasmon resonance. However, measuring temperature gradients generated at the microscale by assemblies of AuNPs remains challenging, especially for random 3D distributions of AuNPs. Here, we introduce a label-free thermometry approach, combining quantitative wavefront microscopy and numerical simulations, to infer the heating power dissipated by a 3D model system consisting of emulsion microdroplets loaded with AuNPs. This approach gives access to the temperature reached in the droplets under laser irradiation without the need for extrinsic calibration. This versatile thermometry method is promising for noninvasive temperature measurements in various 3D microsystems involving AuNPs as colloidal heat sources, including photothermal drug delivery systems.
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Affiliation(s)
- Lucas Sixdenier
- PASTEUR, Département de chimie, École normale supérieure, PSL University, Sorbonne Université, CNRS, 75005 Paris, France
| | - Guillaume Baffou
- Institut Fresnel, CNRS, Aix Marseille University, Centrale Marseille, 13013 Marseille, France
| | - Christophe Tribet
- PASTEUR, Département de chimie, École normale supérieure, PSL University, Sorbonne Université, CNRS, 75005 Paris, France
| | - Emmanuelle Marie
- PASTEUR, Département de chimie, École normale supérieure, PSL University, Sorbonne Université, CNRS, 75005 Paris, France
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3
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Ramesh R, Thimonier C, Desgranges S, Faugeras V, Coulouvrat F, Laurent J, Marrelec G, Contino-Pépin C, Urbach W, Tribet C, Taulier N. Acoustic Droplet Vaporization of Perfluorohexane Emulsions Induced by Heterogeneous Nucleation at an Ultrasonic Frequency of 1.1 MHz. Langmuir 2023; 39:15716-15729. [PMID: 37889478 DOI: 10.1021/acs.langmuir.3c02272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2023]
Abstract
Droplets made of liquid perfluorocarbon undergo a phase transition and transform into microbubbles when triggered by ultrasound of intensity beyond a critical threshold; this mechanism is called acoustic droplet vaporization (ADV). It has been shown that if the intensity of the signal coming from high ultrasonic harmonics are sufficiently high, superharmonic focusing is the mechanism leading to ADV for large droplets (>3 μm) and high frequencies (>1.5 MHz). In such a scenario, ADV is initiated due to a nucleus occurring at a specific location inside the droplet volume. But the question on what induces ADV in the case of nanometer-sized droplets and/or at low ultrasonic frequencies (<1.5 MHz) still remains. We investigated ADV of perfluorohexane (PFH) nano- and microdroplets at a frequency of 1.1 MHz and at conditions where there is no superharmonic focusing. Three types of droplets produced by microfluidics were studied: plain PFH droplets, PFH droplets containing many nanometer-sized water droplets, and droplets made of a PFH corona encapsulating a single micron-sized water droplet. The probability to observe a vaporization event was measured as a function of acoustic pressure. As our experiments were performed on droplet suspensions containing a population of monodisperse droplets, we developed a statistical model to extrapolate, from our experimental curves, the ADV pressure thresholds in the case where only one droplet would be insonified. We observed that the value of ADV pressure threshold decreases as the radius of a plain PFH droplet increases. This value was further reduced when a PFH droplet encapsulates a micron-sized water droplet, while the encapsulation of many nanometer-sized water droplets did not modify the threshold. These results cannot be explained by a model of homogeneous nucleation. However, we developed a heterogeneous nucleation model, where the nucleus appears at the surface in contact with PFH, that successfully predicts our experimental ADV results.
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Affiliation(s)
- R Ramesh
- CNRS, INSERM, Laboratoire d'Imagerie Biomédicale, LIB, Sorbonne Université, F-75006 Paris, France
- Laboratoire de Physique de l'École Normale Supérieure, ENS, Université PSL, CNRS, Sorbonne Université, Université de Paris Cité, F-75005 Paris, France
| | - C Thimonier
- CNRS, INSERM, Laboratoire d'Imagerie Biomédicale, LIB, Sorbonne Université, F-75006 Paris, France
- Laboratoire de Physique de l'École Normale Supérieure, ENS, Université PSL, CNRS, Sorbonne Université, Université de Paris Cité, F-75005 Paris, France
- Département de Chimie, P.A.S.T.E.U.R., École Normale Supérieure, Université PSL, Sorbonne Université, CNRS, 75005 Paris, France
| | - S Desgranges
- Équipe Systèmes Amphiphiles Bioactifs et Formulations Eco-compatibles, UPRI, Avignon Université, 84000 Avignon, France
| | - V Faugeras
- Laboratoire de Physique de l'École Normale Supérieure, ENS, Université PSL, CNRS, Sorbonne Université, Université de Paris Cité, F-75005 Paris, France
| | - F Coulouvrat
- Institut Jean le Rond d'Alembert, CNRS, Sorbonne Université, 4 Place Jussieu, 75005 Paris, France
| | - J Laurent
- Laboratoire de Physique et Mécanique des Milieux Hétérogénes, CNRS, ESPCI Paris, PSL Research University, Sorbonne Université, Université Paris Cité, 75005 Paris, France
| | - G Marrelec
- CNRS, INSERM, Laboratoire d'Imagerie Biomédicale, LIB, Sorbonne Université, F-75006 Paris, France
| | - C Contino-Pépin
- Équipe Systèmes Amphiphiles Bioactifs et Formulations Eco-compatibles, UPRI, Avignon Université, 84000 Avignon, France
| | - W Urbach
- Laboratoire de Physique de l'École Normale Supérieure, ENS, Université PSL, CNRS, Sorbonne Université, Université Paris Cité, F-75005 Paris, France
| | - C Tribet
- PASTEUR, Département de Chimie, École Normale Supérieure, PSL University, Sorbonne Université, CNRS, 75005 Paris, France
| | - N Taulier
- CNRS, INSERM, Laboratoire d'Imagerie Biomédicale, LIB, Sorbonne Université, F-75006 Paris, France
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4
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Bjørnestad VA, Li X, Tribet C, Lund R, Cascella M. Micelle kinetics of photoswitchable surfactants: Self-assembly pathways and relaxation mechanisms. J Colloid Interface Sci 2023; 646:883-899. [PMID: 37235934 DOI: 10.1016/j.jcis.2023.05.057] [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: 01/31/2023] [Revised: 04/19/2023] [Accepted: 05/09/2023] [Indexed: 05/28/2023]
Abstract
HYPOTHESIS A key question in the kinetics of surfactant self-assembly is whether exchange of unimers or fusion/fission of entire micelles is the dominant pathway. In this study, an isomerizable surfactant is used to explore fundamental out-of-equilibrium kinetics and mechanisms for growth and dissolution of micelles. EXPERIMENTS The kinetics of cationic surfactant 4-butyl-4'-(3-trimethylammoniumpropoxy)-phenylazobenzene was studied using molecular dynamics simulations. The fusion and exchange processes were investigated using umbrella sampling. Equilibrium states were validated by comparison with small-angle X-ray scattering data. The photo-isomerization event was simulated by modifying the torsion potential of the photo-responsive group to emulate the trans-to-cis transition. FINDINGS Micelle growth is dominated by unimer exchange processes, whereas, depending on the conditions, dissolution can occur both through fission and unimer expulsion. Fusion barriers increase steeply with the aggregation number making this an unlikely pathway to equilibrium for micelles of sizes that fit with the experimental data. The barriers for unimer expulsion remain constant and are much lower for unimer insertion, making exchange more likely at high aggregation. When simulating photo-conversion events, both fission and a large degree of unimer expulsion can occur depending on the extent of the out-of-equilibrium stress that is put on the system.
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Affiliation(s)
- Victoria Ariel Bjørnestad
- Hylleraas Centre for Quantum Molecular Sciences, Department of Chemistry, University of Oslo, Sem Sælands vei 26, Oslo, 0371, Norway
| | - Xinmeng Li
- Hylleraas Centre for Quantum Molecular Sciences, Department of Chemistry, University of Oslo, Sem Sælands vei 26, Oslo, 0371, Norway
| | - Christophe Tribet
- PASTEUR, Département de Chimie, École Normale Supérieure, PSL University, Sorbonne Université, CNRS, Paris, 75005, France
| | - Reidar Lund
- Hylleraas Centre for Quantum Molecular Sciences, Department of Chemistry, University of Oslo, Sem Sælands vei 26, Oslo, 0371, Norway.
| | - Michele Cascella
- Hylleraas Centre for Quantum Molecular Sciences, Department of Chemistry, University of Oslo, Sem Sælands vei 26, Oslo, 0371, Norway.
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5
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Marconnet A, Michon B, Prost B, Solgadi A, Le Bon C, Giusti F, Tribet C, Zoonens M. Influence of Hydrophobic Groups Attached to Amphipathic Polymers on the Solubilization of Membrane Proteins along with Their Lipids. Anal Chem 2022; 94:14151-14158. [PMID: 36200347 DOI: 10.1021/acs.analchem.2c01746] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
One of the biggest challenges in membrane protein (MP) research is to secure physiologically relevant structural and functional information after extracting MPs from their native membrane. Amphipathic polymers represent attractive alternatives to detergents for stabilizing MPs in aqueous solutions. The predominant polymers used in MP biochemistry and biophysics are amphipols (APols), one class of which, styrene maleic acid (SMA) copolymers and their derivatives, has proven particularly efficient at MP extraction. In order to examine the relationship between the chemical structure of the polymers and their ability to extract MPs from membranes, we have developed two novel classes of APols bearing either cycloalkane or aryl (aromatic) rings, named CyclAPols and ArylAPols, respectively. The effect on solubilization of such parameters as the density of hydrophobic groups, the number of carbon atoms and their arrangement in the hydrophobic moieties, as well as the charge density of the polymers was evaluated. The membrane-solubilizing efficiency of the SMAs, CyclAPols, and ArylAPols was compared using as models (i) two MPs, BmrA and a GFP-fused version of LacY, overexpressed in the inner membrane of Escherichia coli, and (ii) bacteriorhodopsin, naturally expressed in the purple membrane of Halobacterium salinarum. This analysis shows that, as compared to SMAs, the novel APols feature an improved efficiency at extracting MPs while preserving native protein-lipid interactions.
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Affiliation(s)
- Anaïs Marconnet
- Laboratoire de Biologie Physico-Chimique des Protéines Membranaires, CNRS, UMR 7099, Université Paris Cité, F-75005 Paris, France.,Fondation Edmond de Rothschild pour le développement de la recherche scientifique, Institut de Biologie Physico-Chimique, F-75005 Paris, France
| | - Baptiste Michon
- Laboratoire de Biologie Physico-Chimique des Protéines Membranaires, CNRS, UMR 7099, Université Paris Cité, F-75005 Paris, France.,Fondation Edmond de Rothschild pour le développement de la recherche scientifique, Institut de Biologie Physico-Chimique, F-75005 Paris, France
| | - Bastien Prost
- UMS-IPSIT SAMM, Inserm, CNRS, Ingénierie et Plateformes au Service de l'Innovation Thérapeutique, Université Paris-Saclay, F-92296 Châtenay-Malabry, France
| | - Audrey Solgadi
- UMS-IPSIT SAMM, Inserm, CNRS, Ingénierie et Plateformes au Service de l'Innovation Thérapeutique, Université Paris-Saclay, F-92296 Châtenay-Malabry, France
| | - Christel Le Bon
- Laboratoire de Biologie Physico-Chimique des Protéines Membranaires, CNRS, UMR 7099, Université Paris Cité, F-75005 Paris, France.,Fondation Edmond de Rothschild pour le développement de la recherche scientifique, Institut de Biologie Physico-Chimique, F-75005 Paris, France
| | - Fabrice Giusti
- Laboratoire de Biologie Physico-Chimique des Protéines Membranaires, CNRS, UMR 7099, Université Paris Cité, F-75005 Paris, France.,Fondation Edmond de Rothschild pour le développement de la recherche scientifique, Institut de Biologie Physico-Chimique, F-75005 Paris, France
| | - Christophe Tribet
- P.A.S.T.E.U.R., Département de Chimie, École Normale Supérieure, PSL University, CNRS, Sorbonne Université, F-75005 Paris, France
| | - Manuela Zoonens
- Laboratoire de Biologie Physico-Chimique des Protéines Membranaires, CNRS, UMR 7099, Université Paris Cité, F-75005 Paris, France.,Fondation Edmond de Rothschild pour le développement de la recherche scientifique, Institut de Biologie Physico-Chimique, F-75005 Paris, France
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6
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Abstract
Formation of aqueous-core polymer capsules exhibiting an upper critical solution temperature (UCST) was achieved using surfactant-polymer interfacial complexation in water-in-oil inverse emulsions. In fluorinated oil, Coulombic interactions between Krytox, an anionic oil-soluble surfactant, and a cationic poly(lysine) grafted with poly(acrylamide-co-acrylonitrile) enabled the formation of an adsorbed polymer shell at the surface of water droplets. The thermoresponsiveness of the polymer shell was assessed by fluorescence microscopy with and without the presence of nanoparticles, including gold particles. We show that, above the cloud point, polymers with a balanced fraction of UCST grafts form flat adlayers that (i) spontaneously entrap nanoparticles upon cooling and (ii) switch from fluid-like dynamics at high temperature to solid-like dynamics below the cloud point. This system offers a straightforward mean to prepare temperature-sensitive capsules in mild, biocompatible conditions and to concentrate nanoparticles (including nanoheaters) in their shell.
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Affiliation(s)
- Lucas Sixdenier
- P.A.S.T.E.U.R., Département de Chimie, École Normale Supérieure, PSL University, Sorbonne Université, CNRS, 75005 Paris, France
| | - Amélie Augé
- Département de Chimie, Université de Sherbrooke, Sherbrooke, Québec J1K 2R1, Canada
| | - Yue Zhao
- Département de Chimie, Université de Sherbrooke, Sherbrooke, Québec J1K 2R1, Canada
| | - Emmanuelle Marie
- P.A.S.T.E.U.R., Département de Chimie, École Normale Supérieure, PSL University, Sorbonne Université, CNRS, 75005 Paris, France
| | - Christophe Tribet
- P.A.S.T.E.U.R., Département de Chimie, École Normale Supérieure, PSL University, Sorbonne Université, CNRS, 75005 Paris, France
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7
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Royes J, Bjørnestad VA, Brun G, Narayanan T, Lund R, Tribet C. Transition kinetics of mixed lipid:photosurfactant assemblies studied by time-resolved small angle X-ray scattering. J Colloid Interface Sci 2021; 610:830-841. [PMID: 34887060 DOI: 10.1016/j.jcis.2021.11.133] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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: 05/22/2021] [Revised: 10/26/2021] [Accepted: 11/22/2021] [Indexed: 01/29/2023]
Abstract
HYPOTHESIS Photoswitchable surfactants are used in the design of many light-responsive colloids and/or self-assemblies. Photo-isomerization enables to control molecular equilibrium, and triggers transient reorganizations with possibly out-of-equilibrium intermediate states that have been overlooked. Here, we address this question by an in depth structural investigation of intermediate lipid-surfactant assemblies that occur during fast isothermal photo-triggered transition in lipid:surfactant mixtures. EXPERIMENTS The structural parameters of mixed assemblies of azobenzene-containing cationic surfactant (AzoTMA) and dioleoylphosphatidylcholine (DOPC) lipids were studied by light scattering and time-resolved small angle X-ray scattering. Structural and compositional information about the assemblies and unimers in bulk were determined at the photostationary states, as well as at intermediate kinetic states formed during UV or blue light illumination. FINDINGS DOPC:AzoTMA systems form mixed assemblies representative of phospholipid:cationic surfactant mixtures, that evolve from spheroid, to rod-like micelles, and vesicles with increasing DOPC fraction. Transient assemblies detected during the photo-triggered kinetics are similar to the ones found in stationary states. But changes of AzoTMA unimers in bulk can be considerably faster than mass reorganizations of the mixed assemblies, suggesting that out-of-equilibrium conditions are transiently reached. Mass reorganization of the surfactant-enriched assemblies is much faster than in the lipid enriched ones, providing insight into the role of lipids in a slow reorganization of the assemblies.
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Affiliation(s)
- J Royes
- PASTEUR, Département de chimie, École normale supérieure, PSL University, Sorbonne Université, CNRS, Paris 75005, France
| | - V A Bjørnestad
- Department of Chemistry, University of Oslo, P.O. Box 1033, Blindern, Oslo N-0315, Norway
| | - G Brun
- PASTEUR, Département de chimie, École normale supérieure, PSL University, Sorbonne Université, CNRS, Paris 75005, France
| | - T Narayanan
- ESRF-The European Synchrotron, 71 Avenue des Martyrs, Grenoble F-38043, France
| | - R Lund
- Department of Chemistry, University of Oslo, P.O. Box 1033, Blindern, Oslo N-0315, Norway
| | - C Tribet
- PASTEUR, Département de chimie, École normale supérieure, PSL University, Sorbonne Université, CNRS, Paris 75005, France
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8
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Royes J, Biou V, Dautin N, Tribet C, Miroux B. Inducible intracellular membranes: molecular aspects and emerging applications. Microb Cell Fact 2020; 19:176. [PMID: 32887610 PMCID: PMC7650269 DOI: 10.1186/s12934-020-01433-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [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: 04/20/2020] [Accepted: 08/27/2020] [Indexed: 02/08/2023] Open
Abstract
Membrane remodeling and phospholipid biosynthesis are normally tightly regulated to maintain the shape and function of cells. Indeed, different physiological mechanisms ensure a precise coordination between de novo phospholipid biosynthesis and modulation of membrane morphology. Interestingly, the overproduction of certain membrane proteins hijack these regulation networks, leading to the formation of impressive intracellular membrane structures in both prokaryotic and eukaryotic cells. The proteins triggering an abnormal accumulation of membrane structures inside the cells (or membrane proliferation) share two major common features: (1) they promote the formation of highly curved membrane domains and (2) they lead to an enrichment in anionic, cone-shaped phospholipids (cardiolipin or phosphatidic acid) in the newly formed membranes. Taking into account the available examples of membrane proliferation upon protein overproduction, together with the latest biochemical, biophysical and structural data, we explore the relationship between protein synthesis and membrane biogenesis. We propose a mechanism for the formation of these non-physiological intracellular membranes that shares similarities with natural inner membrane structures found in α-proteobacteria, mitochondria and some viruses-infected cells, pointing towards a conserved feature through evolution. We hope that the information discussed in this review will give a better grasp of the biophysical mechanisms behind physiological and induced intracellular membrane proliferation, and inspire new applications, either for academia (high-yield membrane protein production and nanovesicle production) or industry (biofuel production and vaccine preparation).
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Affiliation(s)
- Jorge Royes
- Laboratoire de Biologie Physico-Chimique des Protéines Membranaires, Université de Paris, LBPC-PM, CNRS, UMR7099, 75005, Paris, France. .,Institut de Biologie Physico-Chimique, Fondation Edmond de Rothschild pour le Développement de la Recherche Scientifique, 75005, Paris, France. .,Département de Chimie, École Normale Supérieure, PASTEUR, PSL University, CNRS, Sorbonne Université, 24 Rue Lhomond, 75005, Paris, France.
| | - Valérie Biou
- Laboratoire de Biologie Physico-Chimique des Protéines Membranaires, Université de Paris, LBPC-PM, CNRS, UMR7099, 75005, Paris, France.,Institut de Biologie Physico-Chimique, Fondation Edmond de Rothschild pour le Développement de la Recherche Scientifique, 75005, Paris, France
| | - Nathalie Dautin
- Laboratoire de Biologie Physico-Chimique des Protéines Membranaires, Université de Paris, LBPC-PM, CNRS, UMR7099, 75005, Paris, France.,Institut de Biologie Physico-Chimique, Fondation Edmond de Rothschild pour le Développement de la Recherche Scientifique, 75005, Paris, France
| | - Christophe Tribet
- Département de Chimie, École Normale Supérieure, PASTEUR, PSL University, CNRS, Sorbonne Université, 24 Rue Lhomond, 75005, Paris, France
| | - Bruno Miroux
- Laboratoire de Biologie Physico-Chimique des Protéines Membranaires, Université de Paris, LBPC-PM, CNRS, UMR7099, 75005, Paris, France. .,Institut de Biologie Physico-Chimique, Fondation Edmond de Rothschild pour le Développement de la Recherche Scientifique, 75005, Paris, France.
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9
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Marconnet A, Michon B, Le Bon C, Giusti F, Tribet C, Zoonens M. Solubilization and Stabilization of Membrane Proteins by Cycloalkane-Modified Amphiphilic Polymers. Biomacromolecules 2020; 21:3459-3467. [DOI: 10.1021/acs.biomac.0c00929] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Anaïs Marconnet
- Université de Paris, Laboratoire de Biologie Physico-Chimique des Protéines Membranaires, CNRS, UMR 7099, F-75005 Paris, France
- Institut de Biologie Physico-Chimique, Fondation Edmond de Rothschild pour le Développement de la Recherche Scientifique, F-75005 Paris, France
| | - Baptiste Michon
- Université de Paris, Laboratoire de Biologie Physico-Chimique des Protéines Membranaires, CNRS, UMR 7099, F-75005 Paris, France
- Institut de Biologie Physico-Chimique, Fondation Edmond de Rothschild pour le Développement de la Recherche Scientifique, F-75005 Paris, France
| | - Christel Le Bon
- Université de Paris, Laboratoire de Biologie Physico-Chimique des Protéines Membranaires, CNRS, UMR 7099, F-75005 Paris, France
- Institut de Biologie Physico-Chimique, Fondation Edmond de Rothschild pour le Développement de la Recherche Scientifique, F-75005 Paris, France
| | - Fabrice Giusti
- Université de Paris, Laboratoire de Biologie Physico-Chimique des Protéines Membranaires, CNRS, UMR 7099, F-75005 Paris, France
- Institut de Biologie Physico-Chimique, Fondation Edmond de Rothschild pour le Développement de la Recherche Scientifique, F-75005 Paris, France
| | - Christophe Tribet
- PASTEUR, Département de Chimie, École Normale Supérieure, PSL University, Sorbonne Université, CNRS, F-75005 Paris, France
| | - Manuela Zoonens
- Université de Paris, Laboratoire de Biologie Physico-Chimique des Protéines Membranaires, CNRS, UMR 7099, F-75005 Paris, France
- Institut de Biologie Physico-Chimique, Fondation Edmond de Rothschild pour le Développement de la Recherche Scientifique, F-75005 Paris, France
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10
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Abstract
Effects of green tea tannin epigallocatechin-gallate (EGCG) on thermal-stress-induced amyloid fibril formation of reduced carboxymethylated bovine milk protein κ-casein were studied by dynamical light scattering and small angle X-ray scattering (SAXS). Two populations of aggregates, micelles, and fibrils dominated the time evolution of light scattering intensity and of effective hydrodynamic diameter. SAXS experiments allowed us to resolve micelles and fibrils so that the time dependence of the scattering profile revealed the structural evolution of the two populations. The low-Q scattering intensity prior to an expected increase in time due to fibril growth shows an intriguing rapid decrease, which is interpreted as the release of monomers from micelles. This phenomenon, observed both in the absence and in the presence of EGCG, indicates that under thermal stress free conditions, native monomers are converted to amyloid-prone monomers that do not form micelles. The consumption of free native monomers results in a release of native monomers from micelles because only native proteins participate in micelle-monomer (quasi)equilibrium. This release is reversible, indicating also that native-to-amyloid-prone monomer conversion is reversible as well. We show that EGCG does not bind to protein in fibrils, neither does it affect/prevent the proamyloid conversion of monomers. EGCG hinders the addition of monomers to growing fibrils. These facts allowed us to propose the kinetics model for EGCG-controlled amyloid aggregation of micellar proteins. Therein, we introduced the growth-rate inhibition function, which quantitatively accounts for the effect of EGCG on the fibril growth at any degree of thermal stress.
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Affiliation(s)
- Wei Ma
- PASTEUR, Département de Chimie, École Normale Supérieure, PSL University, Sorbonne Université, CNRS, 24 rue Lhomond, F-75005 Paris, France
| | - Christophe Tribet
- PASTEUR, Département de Chimie, École Normale Supérieure, PSL University, Sorbonne Université, CNRS, 24 rue Lhomond, F-75005 Paris, France
| | - Sylvain Guyot
- INRA UR1268 BIA-Polyphenols, Reactivity, Processes, F-35653 Le Rheu, France
| | - Dražen Zanchi
- PASTEUR, Département de Chimie, École Normale Supérieure, PSL University, Sorbonne Université, CNRS, 24 rue Lhomond, F-75005 Paris, France
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11
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Law-Hine D, Rudiuk S, Bonestebe A, Ienco R, Huille S, Tribet C. Distinctive Low-Resolution Structural Features of Dimers of Antibody-Drug Conjugates and Parent Antibody Determined by Small-Angle X-ray Scattering. Mol Pharm 2019; 16:4902-4912. [PMID: 31618040 DOI: 10.1021/acs.molpharmaceut.9b00792] [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] [Indexed: 11/28/2022]
Abstract
Structural features of lysine-conjugated antibody-drug conjugate (ADC) from humanized IgG1 were studied by small-angle X-ray scattering (SAXS). As the physicochemical properties of the cytotoxic drug (payload) and linker may impact the conformational and colloidal stabilities of the conjugated monoclonal antibody (mAb), it is essential to characterize how the conjugation may affect the overall higher order structure and therefore the physical stability and integrity of the ADCs upon storage conditions. Here, the ADC monomer and aggregates generated upon thermal stress were analyzed by high performance liquid chromatography coupled to SAXS with a particular focus on the fraction of dimers (3-10% depending on the storage conditions at 25 and 40 °C). In addition to average parameters such as radius of gyration, molecular weight, and maximal end-to-end distance, the structural information obtained from SAXS patterns were visualized as a low-resolution average envelope of both monomers and dimers (implementation of two methods: ab initio reconstruction and modeling Fab and Fc as rigid bodies with a flexible hinge). We showed that the monomer envelope of the ADC was similar to the corresponding (nonconjugated) parent monoclonal antibody (mAb). ADC dimers appeared more compact and less polydisperse than the dimers of mAb, which was also confirmed by atomic force microscopy. The generated envelopes of the mAb dimers suggest elongated structures with one or few inter-mAb contacts at the outermost region of Fab or Fc domains. The structural features of ADC dimers are independent of the tested pH buffering system (pH 5.0/acetate and pH 6.0/histidine with or without NaCl) and characterized by multiple, tighter contacts between the Fab and Fc domains and distortion of the monomer native shape. Results from the SAXS structural study show in the present case that conjugation has favored innermost inter-ADC contacts in the dimer, which differ from the inter-mAb ones. In general, it is likely that many parameters affect inter-ADC association, including the chemical nature of linkers and drugs, degree of conjugation, conjugation sites, etc. Making a qualitative difference between mAb and ADC dimers as a function of these parameters can help point to the presence of tight associations that must be abolished in protein drug formulations.
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Affiliation(s)
- Didier Law-Hine
- Département de Chimie, PASTEUR, École Normale Supérieure, PSL University, Sorbonne Université, CNRS, Paris 75005, France
| | - Sergii Rudiuk
- Département de Chimie, PASTEUR, École Normale Supérieure, PSL University, Sorbonne Université, CNRS, Paris 75005, France
| | - Audrey Bonestebe
- Biologics Formulation & Process Development, Biologics Development, SANOFI R&D, 13 quai Jules Guesde- BP 14, Vitry-sur-Seine 94403, France
| | - Romain Ienco
- Biologics Formulation & Process Development, Biologics Development, SANOFI R&D, 13 quai Jules Guesde- BP 14, Vitry-sur-Seine 94403, France
| | - Sylvain Huille
- Biologics Formulation & Process Development, Biologics Development, SANOFI R&D, 13 quai Jules Guesde- BP 14, Vitry-sur-Seine 94403, France
| | - Christophe Tribet
- Département de Chimie, PASTEUR, École Normale Supérieure, PSL University, Sorbonne Université, CNRS, Paris 75005, France
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12
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Hespel L, Dupré de Baubigny J, Lalanne P, de Beco S, Coppey M, Villard C, Humblot V, Marie E, Tribet C. Redox-Triggered Control of Cell Adhesion and Deadhesion on Poly(lysine)- g-poly(ethylene oxide) Adlayers. ACS Appl Bio Mater 2019; 2:4367-4376. [DOI: 10.1021/acsabm.9b00601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Louise Hespel
- PASTEUR, Département de Chimie, École Normale Supérieure, PSL University, Sorbonne Université, CNRS, 75005 Paris, France
| | - Julien Dupré de Baubigny
- PASTEUR, Département de Chimie, École Normale Supérieure, PSL University, Sorbonne Université, CNRS, 75005 Paris, France
| | - Pierre Lalanne
- PASTEUR, Département de Chimie, École Normale Supérieure, PSL University, Sorbonne Université, CNRS, 75005 Paris, France
| | - Simon de Beco
- Laboratoire Physico Chimie, Institut Curie, PSL Université, Sorbonne Université, CNRS UMR168, F-75005 Paris, France
| | - Mathieu Coppey
- Laboratoire Physico Chimie, Institut Curie, PSL Université, Sorbonne Université, CNRS UMR168, F-75005 Paris, France
| | - Catherine Villard
- Laboratoire Physico Chimie, Institut Curie, PSL Université, Sorbonne Université, CNRS UMR168, F-75005 Paris, France
| | - Vincent Humblot
- Laboratoire Réactivité de Surface, Sorbonne Université, CNRS UMR 7197, 4 Place Jussieu, F-75005 Paris, France
| | - Emmanuelle Marie
- PASTEUR, Département de Chimie, École Normale Supérieure, PSL University, Sorbonne Université, CNRS, 75005 Paris, France
| | - Christophe Tribet
- PASTEUR, Département de Chimie, École Normale Supérieure, PSL University, Sorbonne Université, CNRS, 75005 Paris, France
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13
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Royes J, Ilioaia O, Lubart Q, Angius F, Dubacheva GV, Bally M, Miroux B, Tribet C. Bacteria‐Based Production of Thiol‐Clickable, Genetically Encoded Lipid Nanovesicles. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201902929] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Jorge Royes
- PASTEURDépartement de ChimieÉcole Normale SuperiéurePSL UniversitySorbonne UniversitéCNRS 24 rue Lhomond 75005 Paris France
- UMR7099Institut de Biologie Physico-ChimiqueCNRSUniv. Paris DiderotSorbonne Université 13 rue Pierre et Marie Curie 75005 Paris France
| | - Oana Ilioaia
- UMR7099Institut de Biologie Physico-ChimiqueCNRSUniv. Paris DiderotSorbonne Université 13 rue Pierre et Marie Curie 75005 Paris France
| | - Quentin Lubart
- Department of PhysicsChalmers University of Technology Gothenburg Sweden
| | - Federica Angius
- UMR7099Institut de Biologie Physico-ChimiqueCNRSUniv. Paris DiderotSorbonne Université 13 rue Pierre et Marie Curie 75005 Paris France
- Present Address: Department of MicrobiologyInstitute for Water and Wetland Research Heyendaalseweg 135 6525 Nijmegen The Netherlands
| | - Galina V. Dubacheva
- PPSMCNRSÉcole Normale Supérieure Paris-SaclayUniversité Paris-Saclay 61 Avenue du Président Wilson 94235 Cachan France
| | - Marta Bally
- Department of PhysicsChalmers University of Technology Gothenburg Sweden
| | - Bruno Miroux
- UMR7099Institut de Biologie Physico-ChimiqueCNRSUniv. Paris DiderotSorbonne Université 13 rue Pierre et Marie Curie 75005 Paris France
| | - Christophe Tribet
- PASTEURDépartement de ChimieÉcole Normale SuperiéurePSL UniversitySorbonne UniversitéCNRS 24 rue Lhomond 75005 Paris France
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14
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Royes J, Ilioaia O, Lubart Q, Angius F, Dubacheva GV, Bally M, Miroux B, Tribet C. Bacteria-Based Production of Thiol-Clickable, Genetically Encoded Lipid Nanovesicles. Angew Chem Int Ed Engl 2019; 58:7395-7399. [PMID: 30934157 DOI: 10.1002/anie.201902929] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Indexed: 12/31/2022]
Abstract
Despite growing research efforts on the preparation of (bio)functional liposomes, synthetic capsules cannot reach the densities of protein loading and the control over peptide display that is achieved by natural vesicles. Herein, a microbial platform for high-yield production of lipidic nanovesicles with clickable thiol moieties in their outer corona is reported. These nanovesicles show low size dispersity, are decorated with a dense, perfectly oriented, and customizable corona of transmembrane polypeptides. Furthermore, this approach enables encapsulation of soluble proteins into the nanovesicles. Due to the mild preparation and loading conditions (absence of organic solvents, pH gradients, or detergents) and their straightforward surface functionalization, which takes advantage of the diversity of commercially available maleimide derivatives, bacteria-based proteoliposomes are an attractive eco-friendly alternative that can outperform currently used liposomes.
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Affiliation(s)
- Jorge Royes
- PASTEUR, Département de Chimie, École Normale Superiéure, PSL University, Sorbonne Université, CNRS, 24 rue Lhomond, 75005, Paris, France.,UMR7099, Institut de Biologie Physico-Chimique, CNRS, Univ. Paris Diderot, Sorbonne Université, 13 rue Pierre et Marie Curie, 75005, Paris, France
| | - Oana Ilioaia
- UMR7099, Institut de Biologie Physico-Chimique, CNRS, Univ. Paris Diderot, Sorbonne Université, 13 rue Pierre et Marie Curie, 75005, Paris, France
| | - Quentin Lubart
- Department of Physics, Chalmers University of Technology, Gothenburg, Sweden
| | - Federica Angius
- UMR7099, Institut de Biologie Physico-Chimique, CNRS, Univ. Paris Diderot, Sorbonne Université, 13 rue Pierre et Marie Curie, 75005, Paris, France.,Present Address: Department of Microbiology, Institute for Water and Wetland Research, Heyendaalseweg 135, 6525, Nijmegen, The Netherlands
| | - Galina V Dubacheva
- PPSM, CNRS, École Normale Supérieure Paris-Saclay, Université Paris-Saclay, 61 Avenue du Président Wilson, 94235, Cachan, France
| | - Marta Bally
- Department of Physics, Chalmers University of Technology, Gothenburg, Sweden
| | - Bruno Miroux
- UMR7099, Institut de Biologie Physico-Chimique, CNRS, Univ. Paris Diderot, Sorbonne Université, 13 rue Pierre et Marie Curie, 75005, Paris, France
| | - Christophe Tribet
- PASTEUR, Département de Chimie, École Normale Superiéure, PSL University, Sorbonne Université, CNRS, 24 rue Lhomond, 75005, Paris, France
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15
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Abstract
Immediately before adsorption to a horizontal substrate, sinking polymer-coated colloids can undergo a complex sequence of landing, jumping, crawling, and rolling events. Using video tracking, we studied the soft adhesion to a horizontal flat plate of micron-size colloids coated by a controlled molar fraction f of the poly(lysine)-grafted-poly(N-isopropylacrylamide) (PLL-g-PNIPAM) which is a temperature-sensitive polymer. We ramp the temperature from below to above T_{c}=32±1^{∘}C, at which the PNIPAM polymer undergoes a transition, triggering attractive interaction between microparticles and surface. The adsorption rate, the effective in-plane (x-y) diffusion constant, and the average residence time distribution over z were extracted from the Brownian motion records during last seconds before immobilization. Experimental data are understood within a rate-equations-based model that includes aging effects and includes three populations: the untethered, the rolling, and the arrested colloids. We show that preadsorption dynamics casts a characteristic scaling function α(f) proportional to the number of available PNIPAM patches met by soft contact during Brownian rolling. In particular, the increase of in-plane diffusivity with increasing f is understood: The stickiest particles have the shortest rolling regime prior to arrest, so that their motion is dominated by the untethered phase.
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Affiliation(s)
- Giuseppe Boniello
- École Normale Supérieure, Département de Chimie, UMR CNRS-ENS-UPMC 8640 PASTEUR, 24, rue Lhomond, F-75005 Paris, France
| | - Christophe Tribet
- École Normale Supérieure, Département de Chimie, UMR CNRS-ENS-UPMC 8640 PASTEUR, 24, rue Lhomond, F-75005 Paris, France
| | - Emmanuelle Marie
- École Normale Supérieure, Département de Chimie, UMR CNRS-ENS-UPMC 8640 PASTEUR, 24, rue Lhomond, F-75005 Paris, France
| | - Vincent Croquette
- École Normale Supérieure, Département de Physique and Département de Biologie, Laboratoire de Physique Statistique UMR CNRS-ENS 8550, 24, rue Lhomond, F-75005 Paris, France
| | - Dražen Zanchi
- École Normale Supérieure, Département de Chimie, UMR CNRS-ENS-UPMC 8640 PASTEUR, 24, rue Lhomond, F-75005 Paris, France.,Université de Paris 7 Denis Diderot, 5 rue Thomas Mann, 75013 Paris, France
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16
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Dalier F, Dubacheva GV, Coniel M, Zanchi D, Galtayries A, Piel M, Marie E, Tribet C. Mixed Copolymer Adlayers Allowing Reversible Thermal Control of Single Cell Aspect Ratio. ACS Appl Mater Interfaces 2018; 10:2253-2258. [PMID: 29314825 DOI: 10.1021/acsami.7b18513] [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] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Dynamic guidance of living cells is achieved by fine-tuning and spatiotemporal modulation on artificial polymer layers enabling reversible peptide display. Adjustment of surface composition and interactions is obtained by coadsorption of mixed poly(lysine) derivatives, grafted with either repellent PEG, RGD adhesion peptides, or T-responsive poly(N-isopropylacrylamide) strands. Deposition of mixed adlayers provides a straightforward mean to optimize complex substrates, which is here implemented to achieve (1) thermal control of ligand accessibility and (2) adjustment of relative adhesiveness between adjacent micropatterns, while preserving cell attachment during thermal cycles. The reversible polarization of HeLa cells along orthogonal stripes mimics guidance along natural matrices.
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Affiliation(s)
- F Dalier
- PASTEUR, Département Chimie, Ecole Normale Supérieure, PSL Research University, Sorbonne Universités, UPMC Université Paris 06, CNRS , 75005 Paris, France
| | - G V Dubacheva
- PASTEUR, Département Chimie, Ecole Normale Supérieure, PSL Research University, Sorbonne Universités, UPMC Université Paris 06, CNRS , 75005 Paris, France
| | - M Coniel
- PASTEUR, Département Chimie, Ecole Normale Supérieure, PSL Research University, Sorbonne Universités, UPMC Université Paris 06, CNRS , 75005 Paris, France
| | - D Zanchi
- PASTEUR, Département Chimie, Ecole Normale Supérieure, PSL Research University, Sorbonne Universités, UPMC Université Paris 06, CNRS , 75005 Paris, France
- Université de Paris 7 Denis Diderot , 5 rue Thomas Mann, 75013 Paris, France
| | | | | | - E Marie
- PASTEUR, Département Chimie, Ecole Normale Supérieure, PSL Research University, Sorbonne Universités, UPMC Université Paris 06, CNRS , 75005 Paris, France
| | - C Tribet
- PASTEUR, Département Chimie, Ecole Normale Supérieure, PSL Research University, Sorbonne Universités, UPMC Université Paris 06, CNRS , 75005 Paris, France
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17
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Martin N, Costa N, Wien F, Winnik FM, Ortega C, Herbet A, Boquet D, Tribet C. Macromol. Biosci. 2/2017. Macromol Biosci 2017. [DOI: 10.1002/mabi.201770009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Nicolas Martin
- Ecole normale supérieure; PSL Research University; UPMC Univ Paris 06; CNRS, Département de Chimie; PASTEUR, 24, rue Lhomond 75005 Paris France
- Sorbonne Universités; UPMC Univ Paris 06; ENS, CNRS, PASTEUR; 75005 Paris France
| | - Narciso Costa
- CEA, iBiTecS, SPI; Laboratoire d'Ingénierie des Anticorps pour la Santé (LIAS); Bt. 136, CEA Saclay F-91191 Gif sur Yvette France
| | - Frank Wien
- Synchrotron Soleil; Saint-Aubin; F-91192 Gif-sur-Yvette France
| | - Françoise M. Winnik
- Department of Chemistry; Faculty of Pharmacy; Université de Montréal; CP 6128 Succursale Centre Ville Montréal QC H3C 3J7 Canada
- World Premier Initiative (WPI) International Research Center Initiative; International Center for Materials Nanoarchitectonics (MANA) and National Institute for Materials Science (NIMS) 1-1Namiki; Tsukuba 305-0044 Japan
- Department of Chemistry and Faculty of Pharmacy; University of Helsinki; Helsinki FI 00014 Finland
| | - Céline Ortega
- CEA, iBiTecS, SPI; Laboratoire d'Ingénierie des Anticorps pour la Santé (LIAS); Bt. 136, CEA Saclay F-91191 Gif sur Yvette France
| | - Amaury Herbet
- CEA, iBiTecS, SPI; Laboratoire d'Ingénierie des Anticorps pour la Santé (LIAS); Bt. 136, CEA Saclay F-91191 Gif sur Yvette France
| | - Didier Boquet
- CEA, iBiTecS, SPI; Laboratoire d'Ingénierie des Anticorps pour la Santé (LIAS); Bt. 136, CEA Saclay F-91191 Gif sur Yvette France
| | - Christophe Tribet
- Ecole normale supérieure; PSL Research University; UPMC Univ Paris 06; CNRS, Département de Chimie; PASTEUR, 24, rue Lhomond 75005 Paris France
- Sorbonne Universités; UPMC Univ Paris 06; ENS, CNRS, PASTEUR; 75005 Paris France
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18
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Martin N, Costa N, Wien F, Winnik FM, Ortega C, Herbet A, Boquet D, Tribet C. Refolding of Aggregation-Prone ScFv Antibody Fragments Assisted by Hydrophobically Modified Poly(sodium acrylate) Derivatives. Macromol Biosci 2016; 17. [DOI: 10.1002/mabi.201600213] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2016] [Revised: 07/19/2016] [Indexed: 11/06/2022]
Affiliation(s)
- Nicolas Martin
- Ecole normale supérieure; PSL Research University; UPMC Univ Paris 06; CNRS, Département de Chimie; PASTEUR, 24, rue Lhomond 75005 Paris France
- Sorbonne Universités; UPMC Univ Paris 06; ENS, CNRS, PASTEUR; 75005 Paris France
| | - Narciso Costa
- CEA, iBiTecS, SPI; Laboratoire d'Ingénierie des Anticorps pour la Santé (LIAS); Bt. 136, CEA Saclay F-91191 Gif sur Yvette France
| | - Frank Wien
- Synchrotron Soleil; Saint-Aubin; F-91192 Gif-sur-Yvette France
| | - Françoise M. Winnik
- Department of Chemistry; Faculty of Pharmacy; Université de Montréal; CP 6128 Succursale Centre Ville Montréal QC H3C 3J7 Canada
- World Premier Initiative (WPI) International Research Center Initiative; International Center for Materials Nanoarchitectonics (MANA) and National Institute for Materials Science (NIMS) 1-1Namiki; Tsukuba 305-0044 Japan
- Department of Chemistry and Faculty of Pharmacy; University of Helsinki; Helsinki FI 00014 Finland
| | - Céline Ortega
- CEA, iBiTecS, SPI; Laboratoire d'Ingénierie des Anticorps pour la Santé (LIAS); Bt. 136, CEA Saclay F-91191 Gif sur Yvette France
| | - Amaury Herbet
- CEA, iBiTecS, SPI; Laboratoire d'Ingénierie des Anticorps pour la Santé (LIAS); Bt. 136, CEA Saclay F-91191 Gif sur Yvette France
| | - Didier Boquet
- CEA, iBiTecS, SPI; Laboratoire d'Ingénierie des Anticorps pour la Santé (LIAS); Bt. 136, CEA Saclay F-91191 Gif sur Yvette France
| | - Christophe Tribet
- Ecole normale supérieure; PSL Research University; UPMC Univ Paris 06; CNRS, Département de Chimie; PASTEUR, 24, rue Lhomond 75005 Paris France
- Sorbonne Universités; UPMC Univ Paris 06; ENS, CNRS, PASTEUR; 75005 Paris France
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19
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Frka-Petesic B, Zanchi D, Martin N, Carayon S, Huille S, Tribet C. Aggregation of Antibody Drug Conjugates at Room Temperature: SAXS and Light Scattering Evidence for Colloidal Instability of a Specific Subpopulation. Langmuir 2016; 32:4848-4861. [PMID: 27129612 DOI: 10.1021/acs.langmuir.6b00653] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Coupling a hydrophobic drug onto monoclonal antibodies via lysine residues is a common route to prepare antibody-drug conjugates (ADC), a promising class of biotherapeutics. But a few chemical modifications on protein surface often increase aggregation propensity, without a clear understanding of the aggregation mechanisms at stake (loss of colloidal stability, self-assemblies, denaturation, etc.), and the statistical nature of conjugation introduces polydispersity in the ADC population, which raises questions on whether the whole ADC population becomes unstable. To characterize the average interactions between ADC, we monitored small-angle X-ray scattering in solutions of monoclonal IgG1 human antibody drug conjugate, with average degree of conjugation of 0, 2, or 3 drug molecules per protein. To characterize stability, we studied the kinetics of aggregation at room temperature. The intrinsic Fuchs stability ratio of the ADC was estimated from the variation over time of scattered light intensity and hydrodynamic radius, in buffers of varying pH, and at diverse sucrose (0% or 10%) and NaCl (0 or 100 mM) concentrations. We show that stable ADC stock solutions became unstable upon pH shift, well below the pH of maximum average attraction between IgGs. Data indicate that aggregation can be ascribed to a fraction of ADC population usually representing less than 30 mol % of the sample. In contrast to the case of (monodisperse) monoclonal antibodies, our results suggest that a poor correlation between stability and average interaction parameters should be expected as a corollary of dispersity of ADC conjugation. In practice, the most unstable fraction of the ADC population can be removed by filtration, which affects remarkably the apparent stability of the samples. Finally, the lack of correlation between the kinetic stability and variations of the average inter-ADC interactions is tentatively attributed to the uneven nature of charge distributions and the presence of patches on the drug-modified antibodies.
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Affiliation(s)
- B Frka-Petesic
- Département de Chimie, Sorbonne Universités - UPMC Univ Paris 06, CNRS UMR 8640 PASTEUR, Ecole Normale Supérieure-PSL Research University , 24 rue Lhomond, 75005 Paris, France
| | - D Zanchi
- Département de Chimie, Sorbonne Universités - UPMC Univ Paris 06, CNRS UMR 8640 PASTEUR, Ecole Normale Supérieure-PSL Research University , 24 rue Lhomond, 75005 Paris, France
- Université Paris Diderot-Paris 7, 5 rue Thomas Mann, 75013 Paris, France
| | - N Martin
- Département de Chimie, Sorbonne Universités - UPMC Univ Paris 06, CNRS UMR 8640 PASTEUR, Ecole Normale Supérieure-PSL Research University , 24 rue Lhomond, 75005 Paris, France
| | - S Carayon
- SANOFI R&D, Analytics & Formulation Department, Global Biologics , 13 quai Jules Guesde - BP 14, 94403 Vitry-sur-Seine, France
| | - S Huille
- SANOFI R&D, Analytics & Formulation Department, Global Biologics , 13 quai Jules Guesde - BP 14, 94403 Vitry-sur-Seine, France
| | - C Tribet
- Département de Chimie, Sorbonne Universités - UPMC Univ Paris 06, CNRS UMR 8640 PASTEUR, Ecole Normale Supérieure-PSL Research University , 24 rue Lhomond, 75005 Paris, France
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20
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Dalier F, Eghiaian F, Scheuring S, Marie E, Tribet C. Temperature-Switchable Control of Ligand Display on Adlayers of Mixed Poly(lysine)-g-(PEO) and Poly(lysine)-g-(ligand-modified poly-N-isopropylacrylamide). Biomacromolecules 2016; 17:1727-36. [DOI: 10.1021/acs.biomac.6b00136] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- F. Dalier
- Ecole Normale
Supérieure-PSL Research University, Dpt Chimie, Sorbonne Universités
- UPMC Univ. Paris 06, CNRS UMR 8640, 24 rue Lhomond, 75005 Paris, France
| | - F. Eghiaian
- U1006 INSERM,
Aix-Marseille Université, Parc Scientifique et Technologique
de Luminy, 163 av. de Luminy, 13009 Marseille, France
| | - S. Scheuring
- U1006 INSERM,
Aix-Marseille Université, Parc Scientifique et Technologique
de Luminy, 163 av. de Luminy, 13009 Marseille, France
| | - E. Marie
- Ecole Normale
Supérieure-PSL Research University, Dpt Chimie, Sorbonne Universités
- UPMC Univ. Paris 06, CNRS UMR 8640, 24 rue Lhomond, 75005 Paris, France
| | - C. Tribet
- Ecole Normale
Supérieure-PSL Research University, Dpt Chimie, Sorbonne Universités
- UPMC Univ. Paris 06, CNRS UMR 8640, 24 rue Lhomond, 75005 Paris, France
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21
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Lund R, Brun G, Chevallier E, Narayanan T, Tribet C. Kinetics of Photocontrollable Micelles: Light-Induced Self-Assembly and Disassembly of Azobenzene-Based Surfactants Revealed by TR-SAXS. Langmuir 2016; 32:2539-48. [PMID: 26928121 DOI: 10.1021/acs.langmuir.5b04711] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The kinetics of micelles involving photosensitive surfactants is still not well understood. In this work, we unravel the mechanistic pathways involved in the micelle formation and dissolution of photocontrollable micelles. We focus on the fast self-assembly processes of photosensitive cationic azobenzene-containing surfactants (AzoTMA) that display a change in hydrophobicity induced by a reversible cis-trans conformational transition upon exposure to light. By combining both in situ time-resolved small-angle X-ray scattering (SAXS) and light scattering, we characterized the detailed structure and phase behavior of AzoTMA in mixtures of water and dimethylformamide (DMF). Time-resolved synchrotron SAXS with monochromatic light as a trigger enabled us to observe the nonequilibrium formation and dissolution process of micelles (demicellization) directly on the nanoscale with a time resolution starting from milliseconds. The structural results show that in pure water UV-light illumination leads to a 12% reduction of the aggregation number of the micelles and more than a 50% increase in the critical micelle concentration (CMC). Close to the CMC, adjusted by the addition of DMF, UV light illumination leads to a complete dissolution of the micelles, while shining blue light reverses the process and leads to the reformation of micelles. The UV-triggered dissolution follows a two-step mechanism; the first and rapid (second time scale) release of unimers is followed by a slower decomposition of the micelles (over tens of seconds) as a result of an increase in temperature due to optical absorption. Similarly, the reverse process, i.e., micelle formation, occurs rapidly upon photoconversion to trans conformers under blue light, and micelles are disrupted at long exposure time due to the optical absorption and corresponding increase in temperature. Interestingly, the coexistence of unimers with regular micelles is found at all times, and no other transient assemblies could be detected by SAXS.
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Affiliation(s)
- Reidar Lund
- Department of Chemistry, University of Oslo , P.O. Box 1033, Blindern, N-0315 Oslo, Norway
| | - Geoffrey Brun
- Ecole Normale Supérieure-PSL Research University, Département de Chimie, Sorbonne Universités - UPMC Univ Paris 06, CNRS UMR 8640 PASTEUR, 24 rue Lhomond, 75005 Paris, France
| | - Eloïse Chevallier
- PSL Research University, Ecole Super. Phys. & Chim. Ind. ESPCI, Sci & Ingn Matiere Molle, ParisTech, CNRS UMR 7615, 10 Rue Vauquelin, F-75231 Paris 05, France
| | | | - Christophe Tribet
- Ecole Normale Supérieure-PSL Research University, Département de Chimie, Sorbonne Universités - UPMC Univ Paris 06, CNRS UMR 8640 PASTEUR, 24 rue Lhomond, 75005 Paris, France
- PSL Research University, Ecole Super. Phys. & Chim. Ind. ESPCI, Sci & Ingn Matiere Molle, ParisTech, CNRS UMR 7615, 10 Rue Vauquelin, F-75231 Paris 05, France
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22
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Malinge J, Mousseau F, Zanchi D, Brun G, Tribet C, Marie E. Tailored stimuli-responsive interaction between particles adjusted by straightforward adsorption of mixed layers of Poly(lysine)-g-PEG and Poly(lysine)-g-PNIPAM on anionic beads. J Colloid Interface Sci 2016; 461:50-55. [DOI: 10.1016/j.jcis.2015.09.016] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2015] [Revised: 09/01/2015] [Accepted: 09/06/2015] [Indexed: 11/17/2022]
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Martin N, Ruchmann J, Tribet C. Prevention of aggregation and renaturation of carbonic anhydrase via weak association with octadecyl- or azobenzene-modified poly(acrylate) derivatives. Langmuir 2014; 31:338-349. [PMID: 25495869 DOI: 10.1021/la503643q] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The prevention of aggregation during renaturation of urea-denatured carbonic anhydrase B (CAB) via hydrophobic and Coulomb association with anionic polymers was studied in mixed solutions of CAB and amphiphilic poly(acrylate) copolymers. The polymers were derivatives of a parent poly(acrylic acid) randomly grafted with hydrophobic side groups (either 3 mol % octadecyl group, or 1-5 mol % alkylamidoazobenzene photoresponsive groups). CAB:polymer complexes were characterized by light scattering and fluorescence correlation spectroscopy in aqueous buffers (pH 7.75 or 5.9). Circular dichroism and enzyme activity assays enabled us to study the kinetics of renaturation. All copolymers, including the hydrophilic PAA parent chain, provided a remarkable protective effect against CAB aggregation during renaturation, and most of them (but not the octadecyl-modified one) markedly enhanced the regain of activity as compared to CAB alone. The significant role of Coulomb binding in renaturation and comparatively the lack of efficacy of hydrophobic association was highlighted by measurements of activity regain before and after in situ dissociation of hydrophobic complexes (achieved by phototriggering the polarity of azobenzene-modified polymers under exposure to UV light). In the presence of polymers (CAB:polymer of 1:1 w/w ratio) at concentration ∼0.6 g L(-1), the radii of the largest complexes were similar to the radii of the copolymers alone, suggesting that the binding of CAB involves one or a few polymer chain(s). These complexes dissociated by dilution (0.01 g L(-1)). It is concluded that prevention of irreversible aggregation and activity recovery were achieved when marginally stable complexes are formed. Reaching a balanced stability of the complex plays the main role in CAB renaturation, irrespective of the nature of the binding (by Coulomb association, with or without contribution of hydrophobic association).
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Affiliation(s)
- Nicolas Martin
- Département de Chimie, Ecole Normale Supérieure-PSL Research University , 24, rue Lhomond, 75005, Paris, France
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24
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Martin N, Ma D, Herbet A, Boquet D, Winnik FM, Tribet C. Prevention of thermally induced aggregation of IgG antibodies by noncovalent interaction with poly(acrylate) derivatives. Biomacromolecules 2014; 15:2952-62. [PMID: 25019321 DOI: 10.1021/bm5005756] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Prevention of thermal aggregation of antibodies in aqueous solutions was achieved by noncovalent association with hydrophobically modified poly(acrylate) copolymers. Using a polyclonal immunoglobin G (IgG) as a model system for antibodies, we have studied the mechanisms by which this multidomain protein interacts with polyanions when incubated at physiological pH and at temperatures below and above the protein unfolding/denaturation temperature, in salt-free solutions and in 0.1 M NaCl solutions. The polyanions selected were sodium poly(acrylates), random copolymers of sodium acrylate and N-n-octadecylacrylamide (3 mol %), and a random copolymer of sodium acrylate, N-n-octylacrylamide (25 mol %), and N-isopropylacrylamide (40 mol %). They were derived from two poly(acrylic acid) parent chains of Mw 5000 and 150000 g·mol(-1). The IgG/polyanion interactions were monitored by static and dynamic light scattering, fluorescence correlation spectroscopy, capillary zone electrophoresis, and high sensitivity differential scanning calorimetry. In salt-free solutions, the hydrophilic PAA chains form complexes with IgG upon thermal unfolding of the protein (1:1 w/w IgG/PAA), but they do not interact with native IgG. The complexes exhibit a remarkable protective effect against IgG aggregation and maintain low aggregation numbers (average degree of oligomerization <12 at a temperature up to 85 °C). These interactions are screened in 0.1 M NaCl and, consequently, PAAs lose their protective effect. Amphiphilic PAA derivatives (1:1 w/w IgG/polymer) are able to prevent thermal aggregation (preserving IgG monomers) or retard aggregation of IgG (formation of oligomers and slow growth), revealing the importance of both hydrophobic interactions and modulation of the Coulomb interactions with or without NaCl present. This study leads the way toward the design of new formulations of therapeutic proteins using noncovalent 1:1 polymer/protein association that are transient and require a markedly lower additive concentration compared to conventional osmolyte protecting agents. They do not modify IgG permanently, which is an asset for applications in therapeutic protein formulations since the in vivo efficacy of the protein should not be affected.
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Affiliation(s)
- Nicolas Martin
- Ecole Normale Supérieure-PSL Research University , Département de Chimie, 24, rue Lhomond, 75005 Paris, France
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25
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Sun J, Jia L, Emond M, Li MH, Marie E, Jullien L, Tribet C. Photocontrolled Ionization in the Corona of Rodlike Assemblies of Diblock Copolymers. Macromolecules 2014. [DOI: 10.1021/ma402591y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jing Sun
- Ecole
Normale Supérieure, Département de Chimie, UMR8640 CNRS-ENS-UPMC, 24 rue Lhomond, F-75005 Paris, France
| | - Lin Jia
- Institut
Curie, Centre de Recherche, Laboratoire Physico-Chimie Curie, UMR 168 CNRS-IC-UPMC, 26 rue d’Ulm, F-75248 Paris, France
| | - Matthieu Emond
- Ecole
Normale Supérieure, Département de Chimie, UMR8640 CNRS-ENS-UPMC, 24 rue Lhomond, F-75005 Paris, France
| | - Min-Hui Li
- Institut
Curie, Centre de Recherche, Laboratoire Physico-Chimie Curie, UMR 168 CNRS-IC-UPMC, 26 rue d’Ulm, F-75248 Paris, France
| | - Emmanuelle Marie
- Ecole
Normale Supérieure, Département de Chimie, UMR8640 CNRS-ENS-UPMC, 24 rue Lhomond, F-75005 Paris, France
| | - Ludovic Jullien
- Ecole
Normale Supérieure, Département de Chimie, UMR8640 CNRS-ENS-UPMC, 24 rue Lhomond, F-75005 Paris, France
| | - Christophe Tribet
- Ecole
Normale Supérieure, Département de Chimie, UMR8640 CNRS-ENS-UPMC, 24 rue Lhomond, F-75005 Paris, France
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26
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van Dongen SFM, Maiuri P, Marie E, Tribet C, Piel M. Triggering cell adhesion, migration or shape change with a dynamic surface coating. Adv Mater 2013; 25:1687-1691. [PMID: 23355329 DOI: 10.1002/adma.201204474] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2012] [Revised: 11/30/2012] [Indexed: 06/01/2023]
Abstract
There's an APP for that: cell-repellent APP (azido-[polylysine-g-PEG]) is used to create substrates for spatially controlled dynamic cell adhesion. The simple addition of a functional peptide to the culture medium rapidly triggers cell adhesion. This highly accessible yet powerful technique allows diverse applications, demonstrated through tissue motility assays, patterned coculturing and triggered cell shape change.
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Affiliation(s)
- Stijn F M van Dongen
- École Normale Supérieure, Department of chemistry, UMR 8640 CNRS-ENS-UPMC, Paris, France.
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27
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Sun J, Ruchmann J, Pallier A, Jullien L, Desmadril M, Tribet C. Unfolding of Cytochrome c upon Interaction with Azobenzene-Modified Copolymers. Biomacromolecules 2012; 13:3736-46. [DOI: 10.1021/bm301200p] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Jing Sun
- Ecole Normale Supérieure, Département de chimie, UMR8640 CNRS-ENS-UPMC, 24 rue Lhomond, F-75005 Paris, France
| | - Juliette Ruchmann
- Ecole Normale Supérieure, Département de chimie, UMR8640 CNRS-ENS-UPMC, 24 rue Lhomond, F-75005 Paris, France
| | - A. Pallier
- ESPCI, Physico-Chimie
des Polymeres et Milieux Disperses, CNRS UMR7615, 10 rue Vauquelin, 75005 Paris, France
| | - L. Jullien
- Ecole Normale Supérieure, Département de chimie, UMR8640 CNRS-ENS-UPMC, 24 rue Lhomond, F-75005 Paris, France
| | - M. Desmadril
- Laboratoire de Modélisation
et d’Ingénierie des Protéines, UMR8619, Université de Paris-Sud, Bât 430, F-91405
ORSAY CEDEX, France
| | - Christophe Tribet
- Ecole Normale Supérieure, Département de chimie, UMR8640 CNRS-ENS-UPMC, 24 rue Lhomond, F-75005 Paris, France
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28
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29
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Ma D, Martin N, Herbet A, Boquet D, Tribet C, Winnik FM. The Thermally Induced Aggregation of Immunoglobulin G in Solution is Prevented by Amphipols. CHEM LETT 2012. [DOI: 10.1246/cl.2012.1380] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Dewang Ma
- Department of Chemistry, Faculty of Pharmacy, Universite de Montreal
| | | | - Amaury Herbet
- CEA, iBiTecS, SPI, Laboratoire d’Ingénierie des Anticorps pour la Santé (LIAS)
| | - Dider Boquet
- CEA, iBiTecS, SPI, Laboratoire d’Ingénierie des Anticorps pour la Santé (LIAS)
| | | | - Françoise M. Winnik
- Department of Chemistry, Faculty of Pharmacy, Universite de Montreal
- WPI International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science
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Giusti F, Popot JL, Tribet C. Well-defined critical association concentration and rapid adsorption at the air/water interface of a short amphiphilic polymer, amphipol A8-35: a study by Förster resonance energy transfer and dynamic surface tension measurements. Langmuir 2012; 28:10372-10380. [PMID: 22712750 DOI: 10.1021/la300774d] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Amphipols (APols) are short amphiphilic polymers designed to handle membrane proteins (MPs) in aqueous solutions as an alternative to small surfactants (detergents). APols adsorb onto the transmembrane, hydrophobic surface of MPs, forming small, water-soluble complexes, in which the protein is biochemically stabilized. At variance with MP/detergent complexes, MP/APol ones remain stable even at extreme dilutions. Pure APol solutions self-associate into well-defined micelle-like globules comprising a few APol molecules, a rather unusual behavior for amphiphilic polymers, which typically form ill-defined assemblies. The best characterized APol to date, A8-35, is a random copolymer of acrylic acid, isopropylacrylamide, and octylacrylamide. In the present work, the concentration threshold for self-association of A8-35 in salty buffer (NaCl 100 mM, Tris/HCl 20 mM, pH 8.0) has been studied by Förster resonance energy transfer (FRET) measurements and tensiometry. In a 1:1 mol/mol mixture of APols grafted with either rhodamine or 7-nitro-1,2,3-benzoxadiazole, the FRET signal as a function of A8-35 concentration is essentially zero below a threshold concentration of 0.002 g·L(-1) and increases linearly with concentration above this threshold. This indicates that assembly takes place in a narrow concentration interval around 0.002 g·L(-1). Surface tension measurements decreases regularly with concentration until a threshold of ca. 0.004 g·L(-1), beyond which it reaches a plateau at ca. 30 mN·m(-1). Within experimental uncertainties, the two techniques thus yield a comparable estimate of the critical self-assembly concentration. The kinetics of variation of the surface tension was analyzed by dynamic surface tension measurements in the time window 10 ms-100 s. The rate of surface tension decrease was similar in solutions of A8-35 and of the anionic surfactant sodium dodecylsulfate when both compounds were at a similar molar concentration of n-alkyl moieties. Overall, the solution properties of APol "micelles" (in salty buffer) appear surprisingly similar to those of the micelles formed by small, nonpolymeric surfactants, a feature that was not anticipated owing to the polymeric and polydisperse nature of A8-35. The key to the remarkable stability to dilution of A8-35 globules, likely to include also that of MP/APol complexes, lies accordingly in the low value of the critical self-association concentration as compared to that of small amphiphilic analogues.
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Affiliation(s)
- Fabrice Giusti
- UMR 7099, CNRS/Université Paris-7, Institut de Biologie Physico-Chimique, 13 rue Pierre et Marie Curie, F-75005 Paris, France
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31
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Chevallier E, Monteux C, Lequeux F, Tribet C. Photofoams: remote control of foam destabilization by exposure to light using an azobenzene surfactant. Langmuir 2012; 28:2308-2312. [PMID: 22280317 DOI: 10.1021/la204200z] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We report evidence for photocontrolled stability and breakage of aqueous foams made from solutions of a cationic azobenzene-containing surfactant over a wide range of concentrations. Exposure to UV or visible lights results in shape and polarity switches in the surfactant molecule, which in turn affects several properties including critical micelle concentration, equilibrium surface tension, and the air-water interfacial composition (cis isomers are displaced by trans ones). We demonstrate that the trans isomer stabilizes foams, whereas the cis isomer forms unstable foams, a property that does not correlate with effects of light on surface tension, nor with total surfactant concentration. Achieving in situ breakage of foam is accordingly ascribed to the remote control of the dynamics of adsorption/desorption of the surfactant, accompanied by gradients of concentrations out of equilibrium. Photomodulation of adsorption kinetics and/or diffusion dynamics on interfaces is reached here by a noninvasive clean trigger, bringing a new tool for the study of foams.
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Affiliation(s)
- E Chevallier
- Laboratoire de Sciences et Ingénierie de la Matière molle (PPMD-SIMM), CNRS-UMR 7615, ESPCI, 10 rue Vauquelin, 75005 Paris, France
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32
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Sebai SC, Milioni D, Walrant A, Alves ID, Sagan S, Huin C, Auvray L, Massotte D, Cribier S, Tribet C. Photocontrol of the Translocation of Molecules, Peptides, and Quantum Dots through Cell and Lipid Membranes Doped with Azobenzene Copolymers. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201106777] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Sebai SC, Milioni D, Walrant A, Alves ID, Sagan S, Huin C, Auvray L, Massotte D, Cribier S, Tribet C. Photocontrol of the translocation of molecules, peptides, and quantum dots through cell and lipid membranes doped with azobenzene copolymers. Angew Chem Int Ed Engl 2012; 51:2132-6. [PMID: 22262500 DOI: 10.1002/anie.201106777] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2011] [Revised: 11/09/2011] [Indexed: 11/12/2022]
Affiliation(s)
- Sarra C Sebai
- Ecole Normale Supérieure, Departement de Chimie, UMR 8640 CNRS-ENS-UPMC, Paris, France
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34
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van Dongen SFM, Janvore J, van Berkel SS, Marie E, Piel M, Tribet C. Reactive protein-repellent surfaces for the straightforward attachment of small molecules up to whole cells. Chem Sci 2012. [DOI: 10.1039/c2sc20652h] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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35
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Popot JL, Althoff T, Bagnard D, Banères JL, Bazzacco P, Billon-Denis E, Catoire LJ, Champeil P, Charvolin D, Cocco MJ, Crémel G, Dahmane T, de la Maza LM, Ebel C, Gabel F, Giusti F, Gohon Y, Goormaghtigh E, Guittet E, Kleinschmidt JH, Kühlbrandt W, Le Bon C, Martinez KL, Picard M, Pucci B, Sachs JN, Tribet C, van Heijenoort C, Wien F, Zito F, Zoonens M. Amphipols from A to Z. Annu Rev Biophys 2011; 40:379-408. [PMID: 21545287 DOI: 10.1146/annurev-biophys-042910-155219] [Citation(s) in RCA: 207] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Amphipols (APols) are short amphipathic polymers that can substitute for detergents to keep integral membrane proteins (MPs) water soluble. In this review, we discuss their structure and solution behavior; the way they associate with MPs; and the structure, dynamics, and solution properties of the resulting complexes. All MPs tested to date form water-soluble complexes with APols, and their biochemical stability is in general greatly improved compared with MPs in detergent solutions. The functionality and ligand-binding properties of APol-trapped MPs are reviewed, and the mechanisms by which APols stabilize MPs are discussed. Applications of APols include MP folding and cell-free synthesis, structural studies by NMR, electron microscopy and X-ray diffraction, APol-mediated immobilization of MPs onto solid supports, proteomics, delivery of MPs to preexisting membranes, and vaccine formulation.
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Affiliation(s)
- J-L Popot
- Institut de Biologie Physico-Chimique, CNRS/Université Paris-7 UMR 7099, Paris, France.
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36
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Galindo-Alvarez J, Le KA, Sadtler V, Marchal P, Perrin P, Tribet C, Marie E, Durand A. Enhanced stability of nanoemulsions using mixtures of non-ionic surfactant and amphiphilic polyelectrolyte. Colloids Surf A Physicochem Eng Asp 2011. [DOI: 10.1016/j.colsurfa.2011.08.021] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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37
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Gohon Y, Vindigni JD, Pallier A, Wien F, Celia H, Giuliani A, Tribet C, Chardot T, Briozzo P. High water solubility and fold in amphipols of proteins with large hydrophobic regions: Oleosins and caleosin from seed lipid bodies. Biochimica et Biophysica Acta (BBA) - Biomembranes 2011; 1808:706-16. [DOI: 10.1016/j.bbamem.2010.12.002] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2010] [Revised: 11/12/2010] [Accepted: 12/03/2010] [Indexed: 10/18/2022]
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38
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Ruchmann J, Sebai SC, Tribet C. Photoresponse of Complexes between Surfactants and Azobenzene-Modified Polymers Accounting for the Random Distribution of Hydrophobic Side Groups. Macromolecules 2011. [DOI: 10.1021/ma1024544] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Juliette Ruchmann
- UPMC & CNRS UMR 7615, Laboratoire de Physico-chimie des polymères et des milieux dispersés, ESPCI, 10 rue Vauquelin, 75005 Paris, France
| | - Sarra C. Sebai
- Ecole Normale Supérieure & CNRS UMR 8640, Pôle Chimie Biophysique, 24 rue Lhomond, 75005 Paris, France
| | - Christophe Tribet
- Ecole Normale Supérieure & CNRS UMR 8640, Pôle Chimie Biophysique, 24 rue Lhomond, 75005 Paris, France
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39
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40
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Galindo-Alvarez J, Boyd D, Marchal P, Tribet C, Perrin P, Marie-Bégué E, Durand A, Sadtler V. Miniemulsion polymerization templates: A systematic comparison between low energy emulsification (Near-PIT) and ultrasound emulsification methods. Colloids Surf A Physicochem Eng Asp 2011. [DOI: 10.1016/j.colsurfa.2010.11.019] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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41
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Rotureau E, Tribet C, Fouilloux S, Marchal P, Sadtler V, Marie-Bégué E, Durand A, Perrin P. Light-Responsiveness of C 12E 6/Polymer Complexes Swollen with Dodecane. J Phys Chem B 2010; 114:13294-303. [DOI: 10.1021/jp106127w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- E. Rotureau
- Laboratoire de Physico-chimie des Polymères et des Milieux Dispersés, Université Pierre et Marie Curie, CNRS, ESPCI UMR 7615, 10 rue Vauquelin, F-75231 Paris, France, Laboratoire de Chimie Physique Macromoléculaire, Université de Nancy, CNRS, ENSIC INPL, 1 rue Grandville, F-54001 Nancy, France, and Centre de Génie Chimique des Milieux Rhéologiquement Complexes, Université de Nancy, CNRS, ENSIC INPL, 1 rue Grandville, F-54001 Nancy, France
| | - C. Tribet
- Laboratoire de Physico-chimie des Polymères et des Milieux Dispersés, Université Pierre et Marie Curie, CNRS, ESPCI UMR 7615, 10 rue Vauquelin, F-75231 Paris, France, Laboratoire de Chimie Physique Macromoléculaire, Université de Nancy, CNRS, ENSIC INPL, 1 rue Grandville, F-54001 Nancy, France, and Centre de Génie Chimique des Milieux Rhéologiquement Complexes, Université de Nancy, CNRS, ENSIC INPL, 1 rue Grandville, F-54001 Nancy, France
| | - S. Fouilloux
- Laboratoire de Physico-chimie des Polymères et des Milieux Dispersés, Université Pierre et Marie Curie, CNRS, ESPCI UMR 7615, 10 rue Vauquelin, F-75231 Paris, France, Laboratoire de Chimie Physique Macromoléculaire, Université de Nancy, CNRS, ENSIC INPL, 1 rue Grandville, F-54001 Nancy, France, and Centre de Génie Chimique des Milieux Rhéologiquement Complexes, Université de Nancy, CNRS, ENSIC INPL, 1 rue Grandville, F-54001 Nancy, France
| | - P. Marchal
- Laboratoire de Physico-chimie des Polymères et des Milieux Dispersés, Université Pierre et Marie Curie, CNRS, ESPCI UMR 7615, 10 rue Vauquelin, F-75231 Paris, France, Laboratoire de Chimie Physique Macromoléculaire, Université de Nancy, CNRS, ENSIC INPL, 1 rue Grandville, F-54001 Nancy, France, and Centre de Génie Chimique des Milieux Rhéologiquement Complexes, Université de Nancy, CNRS, ENSIC INPL, 1 rue Grandville, F-54001 Nancy, France
| | - V. Sadtler
- Laboratoire de Physico-chimie des Polymères et des Milieux Dispersés, Université Pierre et Marie Curie, CNRS, ESPCI UMR 7615, 10 rue Vauquelin, F-75231 Paris, France, Laboratoire de Chimie Physique Macromoléculaire, Université de Nancy, CNRS, ENSIC INPL, 1 rue Grandville, F-54001 Nancy, France, and Centre de Génie Chimique des Milieux Rhéologiquement Complexes, Université de Nancy, CNRS, ENSIC INPL, 1 rue Grandville, F-54001 Nancy, France
| | - E. Marie-Bégué
- Laboratoire de Physico-chimie des Polymères et des Milieux Dispersés, Université Pierre et Marie Curie, CNRS, ESPCI UMR 7615, 10 rue Vauquelin, F-75231 Paris, France, Laboratoire de Chimie Physique Macromoléculaire, Université de Nancy, CNRS, ENSIC INPL, 1 rue Grandville, F-54001 Nancy, France, and Centre de Génie Chimique des Milieux Rhéologiquement Complexes, Université de Nancy, CNRS, ENSIC INPL, 1 rue Grandville, F-54001 Nancy, France
| | - A. Durand
- Laboratoire de Physico-chimie des Polymères et des Milieux Dispersés, Université Pierre et Marie Curie, CNRS, ESPCI UMR 7615, 10 rue Vauquelin, F-75231 Paris, France, Laboratoire de Chimie Physique Macromoléculaire, Université de Nancy, CNRS, ENSIC INPL, 1 rue Grandville, F-54001 Nancy, France, and Centre de Génie Chimique des Milieux Rhéologiquement Complexes, Université de Nancy, CNRS, ENSIC INPL, 1 rue Grandville, F-54001 Nancy, France
| | - P. Perrin
- Laboratoire de Physico-chimie des Polymères et des Milieux Dispersés, Université Pierre et Marie Curie, CNRS, ESPCI UMR 7615, 10 rue Vauquelin, F-75231 Paris, France, Laboratoire de Chimie Physique Macromoléculaire, Université de Nancy, CNRS, ENSIC INPL, 1 rue Grandville, F-54001 Nancy, France, and Centre de Génie Chimique des Milieux Rhéologiquement Complexes, Université de Nancy, CNRS, ENSIC INPL, 1 rue Grandville, F-54001 Nancy, France
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Sebai SC, Cribier S, Karimi A, Massotte D, Tribet C. Permeabilization of lipid membranes and cells by a light-responsive copolymer. Langmuir 2010; 26:14135-14141. [PMID: 20704336 DOI: 10.1021/la102456z] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Membrane permeabilization is achieved via numerous techniques involving the use of molecular agents such as peptides used in antimicrobial therapy. Although high efficiency is reached, the permeabilization mechanism remains global with a noticeable lack of control. To achieve localized control and more gradual increase in membrane perturbation, we have developed hydrophobically modified poly(acrylic acid) amphiphilic copolymers with light-responsive azobenzene hydrophobic moieties. We present evidence for light triggered membrane permeabilization in the presence azobenzene-modified polymers (AMPs). Exposure to UV or blue light reversibly switches the polarity of the azobenzene (cis-trans isomerization) in AMPs, hence controlling AMP-loaded lipid vesicles permeabilization via in situ activation. Release of encapsulated probes was studied by microscopy on isolated AMP-loaded giant unilamellar vesicles (pol-GUVs). We show that in pH and ionic strength conditions that are biologically relevant pol-GUVs are kept impermeable when they contain predominantly cis-AMPs but become leaky with no membrane breakage upon exposure to blue light due to AMPs switch to a trans-apolar state. In addition, we show that AMPs induce destabilization of plasma membranes when added to mammal cells in their trans-apolar state, with no loss of cell viability. These features make AMPs promising tools for remote control of cell membrane permeabilization in mild conditions.
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Affiliation(s)
- Sarra C Sebai
- Laboratoire de Physico-chimie des polymères et des milieux dispersés, ESPCI, UPMC & CNRS UMR 7615, 10 rue Vauquelin, 75005 Paris, France.
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Tribet C, Diab C, Dahmane T, Zoonens M, Popot JL, Winnik FM. Thermodynamic characterization of the exchange of detergents and amphipols at the surfaces of integral membrane proteins. Langmuir 2009; 25:12623-34. [PMID: 19594168 DOI: 10.1021/la9018772] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
The aggregation of integral membrane proteins (IMPs) in aqueous media is a significant concern for mechanistic investigations and pharmaceutical applications of this important class of proteins. Complexation of IMPs with amphiphiles, either detergents or short amphiphilic polymers known as amphipols (APols), renders IMPs water-soluble. It is common knowledge that IMP-detergent complexes are labile, while IMP-APol complexes are exceptionally stable and do not dissociate even under conditions of extreme dilution. To understand the thermodynamic origin of this difference in stability and to guide the design of new APols, we have studied by isothermal titration calorimetry (ITC) the heat exchanges during two reciprocal processes, the "trapping" of detergent-solubilized IMPs in APols and the "stripping" of IMP-APol complexes by detergents, using two IMPs (the transmembrane domain of porin OmpA from Escherichia coli and bacteriorhodopsin from Halobium salinarium), two APols [an anionic polymer derived from acrylic acid (A8-35) and a cationic phosphorylcholine-based polymer (C22-43)], and two neutral detergents [n-octyl thioglucoside (OTG) and n-octyltetraethylene glycol (C(8)E(4))]. In the presence of detergent, free APols and IMP-APol complexes form mixed particles, APol-detergent and IMP-APol-detergent, respectively, according to the regular mixing model. Diluting IMP-APol-detergent complexes below the critical micellar concentration (CMC) of the detergent triggers the dispersion of detergent molecules as monomers, a process characterized by an enthalpy of demicellization. The enthalpy of APol <--> detergent exchange on the hydrophobic surface of IMPs is negligibly small, an indication of the similarity of the molecular interactions of IMPs with the two types of amphiphiles. The enhanced stability against dilution of IMP-APol complexes, compared to IMP-detergent ones, originates from the difference in entropy gain achieved upon release in water of a few APol molecules (in the case of IMP-APol complexes) or several hundred detergent molecules (in the case of IMP-detergent complexes). The data account both for the stability of IMP-APols complexes in the absence of detergent and for the ease with which detergents displace APols from the surface of proteins.
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Affiliation(s)
- C Tribet
- Physico-chimie des Polymères et Milieux Dispersés, UMR 7615, CNRS and Université Paris 6, ESPCI, 10 rue Vauquelin, F-75231 Paris, France
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Vial F, Cousin F, Bouteiller L, Tribet C. Rate of permeabilization of giant vesicles by amphiphilic polyacrylates compared to the adsorption of these polymers onto large vesicles and tethered lipid bilayers. Langmuir 2009; 25:7506-7513. [PMID: 19371041 DOI: 10.1021/la900261s] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We examined by fluorescence microscopy the permeabilization of giant vesicles by hydrophobically modified polyacrylates (called amphipols). Amphipols trigger permeabilization to FITC-dextran of egg-PC/DPPA vesicles with no breakage of the lipid bilayers. The polyanionic amphipols were passing through bilayers as shown by permeabilization of multilamellar vesicles. Remarkably, the vesicles were not simultaneously permeable but became leaky one after the other. Altogether, our observations suggest a random formation of pores having diameters above a few nanometers. Decreasing pH and increasing ionic strength and polymer concentration were increasing the rate of permeabilization. The rate and efficiency of permeabilization was compared to the rate and density of adsorption of amphipols onto lipid membranes (as estimated by titration calorimetry onto large unilamellar vesicles and neutron reflectivity measurements on tethered bilayers). The polymer adsorption layer is built up in a few minutes. We conclude that the rate-limiting step for permeabilization is not the adsorption from the bulk solution but relates to slow intramembrane reorganizations.
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Affiliation(s)
- F Vial
- Laboratoire de Physico-chimie des Polymères et des Milieux Dispersés, UPMC and CNRS UMR 7615, ESPCI, 10 rue Vauquelin, F-75005 Paris, France
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Zanchi D, Konarev PV, Tribet C, Baron A, Svergun DI, Guyot S. Rigidity, conformation, and solvation of native and oxidized tannin macromolecules in water-ethanol solution. J Chem Phys 2009; 130:245103. [DOI: 10.1063/1.3156020] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
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Tribet C, Vial F. Flexible macromolecules attached to lipid bilayers: impact on fluidity, curvature, permeability and stability of the membranes. Soft Matter 2007; 4:68-81. [PMID: 32907085 DOI: 10.1039/b708431p] [Citation(s) in RCA: 84] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
This review summarizes recent investigations on the association of macromolecules on lipid bilayers. Hydrophilic and flexible polymers can form soft coronae tenuously adsorbed or anchored on the lipid membrane. Other synthetic macromolecules are embedded in the apolar region of the membrane. Recent experimental and theoretical works focus on the perturbation of lipid properties achieved depending on the nature and strength of binding. Of importance to biomimicry, to tethered model membranes, and drug carriers, the effects achievable include modulation of the lateral diffusivity of lipids, shape distortions, lateral segregations, formation of well-defined nanopores and ultimately the stimuli responsive disruption of the membrane.
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Affiliation(s)
- Christophe Tribet
- Physico-chimie des Polymères et Milieux Dispersés, CNRS UMR 7615 and Université Paris 6, ESPCI, 10 rue Vauquelin, F-75005 Paris, France
| | - Florent Vial
- Physico-chimie des Polymères et Milieux Dispersés, CNRS UMR 7615 and Université Paris 6, ESPCI, 10 rue Vauquelin, F-75005 Paris, France
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Kayitmazer AB, Strand SP, Tribet C, Jaeger W, Dubin PL. Effect of Polyelectrolyte Structure on Protein−Polyelectrolyte Coacervates: Coacervates of Bovine Serum Albumin with Poly(diallyldimethylammonium chloride) versus Chitosan. Biomacromolecules 2007; 8:3568-77. [PMID: 17892297 DOI: 10.1021/bm700645t] [Citation(s) in RCA: 114] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Electrostatic interactions between synthetic polyelectrolytes and proteins can lead to the formation of dense, macroion-rich liquid phases, with equilibrium microheterogeneities on length scales up to hundreds of nanometers. The effects of pH and ionic strength on the rheological and optical properties of these coacervates indicate microstructures sensitive to protein-polyelectrolyte interactions. We report here on the properties of coacervates obtained for bovine serum albumin (BSA) with the biopolyelectrolyte chitosan and find remarkable differences relative to coacervates obtained for BSA with poly(diallyldimethylammonium chloride) (PDADMAC). Coacervation with chitosan occurs more readily than with PDADMAC. Viscosities of coacervates obtained with chitosan are more than an order of magnitude larger and, unlike those with PDADMAC, show temperature and shear rate dependence. For the coacervates with chitosan, a fast relaxation time in dynamic light scattering, attributable to relatively unrestricted protein diffusion in both systems, is diminished in intensity by a factor of 3-4, and the consequent dominance by slow modes is accompanied by a more heterogeneous array of slow apparent diffusivities. In place of a small-angle neutron scattering Guinier region in the vicinity of 0.004 A-1, a 10-fold increase in scattering intensity is observed at lower q. Taken together, these results confirm the presence of dense domains on length scales of hundreds of nanometers to micrometers, which in coacervates prepared with chitosan are less solidlike, more interconnected, and occupy a larger volume fraction. The differences in properties are thus correlated with differences in mesophase structure.
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Affiliation(s)
- A Basak Kayitmazer
- Department of Chemistry, University of Massachusetts-Amherst, 710 North Pleasant Street, Amherst, MA 01003, USA.
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Diab C, Tribet C, Gohon Y, Popot JL, Winnik FM. Complexation of integral membrane proteins by phosphorylcholine-based amphipols. Biochimica et Biophysica Acta (BBA) - Biomembranes 2007; 1768:2737-47. [PMID: 17825785 DOI: 10.1016/j.bbamem.2007.07.007] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2007] [Revised: 06/18/2007] [Accepted: 07/05/2007] [Indexed: 10/23/2022]
Abstract
Amphiphilic macromolecules, known as amphipols, have emerged as promising candidates to replace conventional detergents for handling integral membrane proteins in water due to the enhanced stability of protein/amphipol complexes as compared to protein/detergent complexes. The limited portfolio of amphipols currently available prompted us to develop amphipols bearing phosphorylcholine-based units (PC). Unlike carboxylated polymers, PC-amphipols remain soluble in aqueous media under conditions of low pH, high salt concentration, or in the presence of divalent ions. The solubilizing properties of four PC-amphipols were assessed in the case of two membrane proteins, cytochrome b(6)f and bacteriorhodopsin. The protein/PC-amphipol complexes had a low dispersity in size, as determined by rate zonal ultracentrifugation. Short PC-amphipols (<M> approximately 22 kDa) of low dispersity in length, containing approximately 30 mol% octyl side groups, approximately 35 mol% PC-groups, and approximately 35 mol% isopropyl side groups, appeared best suited to form stable complexes, preserving the native state of BR over periods of several days. BR/PC-amphipol complexes remained soluble in aqueous media at pH> or =5, as well as in the presence of 1 M NaCl or 12 mM calcium ions. Results from isothermal titration calorimetry indicated that the energetics of the conversion of BR/detergent complexes into BR/amphipol complexes are similar for PC-amphipols and carboxylated amphiphols.
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Affiliation(s)
- C Diab
- Department of Chemistry and Faculty of Pharmacy, Université de Montréal, CP 6128 Succursale Centre Ville, Montreal QC, Canada
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Flötenmeyer M, Weiss H, Tribet C, Popot JL, Leonard K. The use of amphipathic polymers for cryo electron microscopy of NADH:ubiquinone oxidoreductase (complex I). J Microsc 2007; 227:229-35. [PMID: 17760617 DOI: 10.1111/j.1365-2818.2007.01805.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
In the three-dimensional (3D) structure determination of macromolecules, cryo electron microscopy (cryo-EM) is an important method for obtaining micrographs of unstained specimens for the single-particle reconstruction approach. For cryo-EM, proteins are fixed in a frozen hydrated state by quick-freezing in a thin water layer on a holey carbon film. Cryo-EM of detergent-solubilized membrane proteins is hindered by the fact that detergents reduce the surface tension of water, so that it is difficult to control the ice thickness and the distribution of protein. Amphipols are a new class of amphipathic polymers designed to handle membrane proteins in aqueous solutions under particularly mild conditions. Amphipol A8-35 stabilizes NADH:ubiquinone oxidoreductase (complex I) from Neurospora crassa and keeps it water-soluble in the absence of free detergent. Electron microscope images of quick-frozen complex I/A8-35 samples were used for computer-based single-particle averaging and 3D reconstruction, and the reconstruction of unstained frozen-hydrated particles compared with previous detergent-based reconstructions. The potential of amphipols for cryo-EM is discussed.
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Affiliation(s)
- Matthias Flötenmeyer
- European Molecular Biology Laboratory, Meyerhofstrasse 1, D-69117 Heidelberg, Germany
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Zanchi D, Vernhet A, Poncet-Legrand C, Cartalade D, Tribet C, Schweins R, Cabane B. Colloidal dispersions of tannins in water-ethanol solutions. Langmuir 2007; 23:9949-59. [PMID: 17713931 DOI: 10.1021/la700694b] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
The molecular interactions of grape-seed tannins dissolved in water-ethanol solutions have been studied through small angle neutron scattering, light scattering, and physical separation techniques. Through selective precipitation in different solvent mixtures, three populations of tannin macromolecules have been identified: T1 (2% of the total tannin), which forms colloidal particles when the ethanol content of the solvent is brought below phiA = 0.6; T2a (33% of the tannin), which phase-separates below phiA = 0.08 in ionic conditions that are typical of wine; and T2b (65% of the tannin), which remains in solution regardless of ethanol content. Each population remains molecularly dissolved (i.e., it does not form any association structures such as stacks or micelles) until the threshold where dense colloidal particles are formed through nucleation and growth. The colloidal dispersions are metastable, due to the adsorption of organic acids on the particle surfaces; increasing ionic strength and reducing ethanol content cause the loss of this metastability and the aggregation of the particles.
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Affiliation(s)
- Drazen Zanchi
- Laboratoire de Physique Théorique et Hautes Energies, CNRS UMR 7589, Universités Paris 7 et Paris 6, 4 place Jussieu, BP 126, 75252 Paris cedex 05, France.
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