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Glaive AS, Cœur CL, Guigner JM, Amiel C, Volet G. Amphiphilic Heterograft Copolymers Bearing Biocompatible/Biodegradable Grafts. Langmuir 2024; 40:2050-2063. [PMID: 38243903 DOI: 10.1021/acs.langmuir.3c02772] [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: 01/22/2024]
Abstract
The amphiphilic heterograft copolymers bearing biocompatible/biodegradable grafts [poly(2-methyl-2-oxazoline-co-2-pentyl-2-oxazoline)-g-poly(d-l-lactic acid)/poly(2-ethyl-2-oxazoline)] were synthesized successfully by the combination of cationic ring-opening polymerization and click chemistry via the ⟨"grafting to"⟩ approach. The challenge of this synthesis was to graft together hydrophobic and hydrophilic chains on a hydrophilic platform based on PMeOx. The efficiency of grafting depends on the chemical nature of the grafts and of the length of the macromolecular chains. The self-assembly of these polymers in aqueous media was investigated by DLS, cryo-TEM, and SANS. The results demonstrated that different morphologies were obtained from nanospheres and vesicles to filaments depending on the hydrophilic weight ratio in the heterograft copolymer varying from 0.38 until 0.84. As poly(2-ethyl-2-oxazoline) is known to be thermoresponsive, the influence of temperature rise on the nanoassembly stability was studied in water and in a physiological medium. SANS and DLS measurements during a temperature ramp allowed to show that nanoassemblies start to self-assemble in "raspberry like" primary structures at 50 °C, and these structures grow and get denser as the temperature is increased further. These amphiphilic heterograft copolymers may include hydrophobic drugs and should find important applications for biomedical applications which require stealth properties.
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Affiliation(s)
- Aline-Sarah Glaive
- Univ Paris Est Creteil, CNRS, ICMPE, UMR 7182, 2 rue Henri Dunant, Thiais 94320, France
| | - Clémence Le Cœur
- Univ Paris Est Creteil, CNRS, ICMPE, UMR 7182, 2 rue Henri Dunant, Thiais 94320, France
- Laboratoire Léon Brillouin, Université Paris-Saclay, CEA-CNRS UMR CEA Saclay, Gif sur Yvette 91191, France
| | - Jean-Michel Guigner
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), Sorbonne Université, IRD, CNRS UMR7590, MNHN; 4 place Jussieu, Paris 75252, France
| | - Catherine Amiel
- Univ Paris Est Creteil, CNRS, ICMPE, UMR 7182, 2 rue Henri Dunant, Thiais 94320, France
| | - Gisèle Volet
- Univ Paris Est Creteil, CNRS, ICMPE, UMR 7182, 2 rue Henri Dunant, Thiais 94320, France
- Université d'Evry Val d'Essonne, Rue du Père Jarlan, Evry cedex 91025, France
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Le Fer G, Le Cœur C, Guigner JM, Amiel C, Volet G. Amphiphilic diblock and triblock copolymers based on poly(2-methyl-2-oxazoline) and poly(D,L-lactide): Synthesis, physicochemical characterizations and self-assembly properties. POLYMER 2019. [DOI: 10.1016/j.polymer.2019.03.037] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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Le Fer G, Le Cœur C, Guigner JM, Amiel C, Volet G. Biocompatible Soft Nanoparticles with Multiple Morphologies Obtained from Nanoprecipitation of Amphiphilic Graft Copolymers in a Backbone-Selective Solvent. Langmuir 2017; 33:2849-2860. [PMID: 28248524 DOI: 10.1021/acs.langmuir.7b00471] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Stealth nanocarriers are a promising technology for the treatment of diseases. However, the preparation and characterization of well-defined soft nanoparticulate systems remain challenging. Here we describe a platform of amphiphilic graft copolymers leading to nanoparticles with multiple morphologies and the role of the hydrophilic backbone in their interaction with a model protein. The amphiphilic graft copolymers platform was composed of hydrophilic backbone poly(2-methyl-2-oxazoline-co-2-pentyl-2-oxazoline) (P(MeOx-co-PentOx)), prepared via cationic ring-opening polymerization. Hydrophobic poly(d,l-lactide) (PLA) chains were grafted on the backbone via Huisgen 1,3-dipolar cycloaddition. The "click" copper-catalyzed cycloaddition reactions of azides with alkynes (CuAAC) were successfully carried out, and a series of amphiphilic copolymers were prepared containing a backbone with a number-average molecular weight of 14.2 × 103 g mol-1 and different hydrophobic PLA grafts with various molecular weights (2.8 × 103-12.4 × 103 g mol-1). These original architectures of copolymers, when nanoprecipitated in water, the backbone-selective solvent, allowed us to obtain various structures of nanoparticles with a hydrodynamic diameter in the range of 65-99 nm. More interestingly, a plurality of morphologies going from unilamellar, multilamellar, and large compound vesicles to core-shell nanoparticles and depending on the PLA molecular weights were evidenced by combining cryo-transmission electron microscopy (cryo-TEM) and small-angle neutron scattering (SANS) studies. A first evaluation of their stealthiness by studying the stability and the interaction of these nano-objects with a model protein revealed the role played by the P(MeOx-co-PentOx) in these interactions, demonstrating the utility of this amphiphilic graft copolymers platform with well-defined architectures for the design of nanocarriers in drug delivery applications.
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Affiliation(s)
- Gaëlle Le Fer
- Université Paris Est , ICMPE (UMR7182), CNRS, UPEC, 94320 Thiais, France
| | - Clémence Le Cœur
- Université Paris Est , ICMPE (UMR7182), CNRS, UPEC, 94320 Thiais, France
- Laboratoire Léon Brillouin, UMR 12 CEA-CNRS, CEA Saclay , 91191 Gif-sur-Yvette Cedex, France
| | - Jean-Michel Guigner
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), Sorbonne Universités , UPMC Paris 6, IRD, CNRS UMR7590, MNHN, 4 place Jussieu, 75252 Paris Cedex 05, France
| | - Catherine Amiel
- Université Paris Est , ICMPE (UMR7182), CNRS, UPEC, 94320 Thiais, France
| | - Gisèle Volet
- Université Paris Est , ICMPE (UMR7182), CNRS, UPEC, 94320 Thiais, France
- Université d'Evry Val d'Essonne , Rue du Père Jarlan, 91025 Evry Cedex, France
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Robin C, Lorthioir C, Amiel C, Fall A, Ovarlez G, Le Cœur C. Unexpected Rheological Behavior of Concentrated Poly(methacrylic acid) Aqueous Solutions. Macromolecules 2017. [DOI: 10.1021/acs.macromol.6b01552] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [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)
- Clément Robin
- ICMPE
(UMR 7182), CNRS, UPEC, Université Paris Est, F- 94320 Thiais, France
| | - Cédric Lorthioir
- ICMPE
(UMR 7182), CNRS, UPEC, Université Paris Est, F- 94320 Thiais, France
| | - Catherine Amiel
- ICMPE
(UMR 7182), CNRS, UPEC, Université Paris Est, F- 94320 Thiais, France
| | - Abdoulaye Fall
- Laboratoire
Navier (ENPC−CNRS-IFSTTAR), Université Paris-Est, 2 Allée Kepler, 77420 Champs-sur-Marne, France
| | - Guillaume Ovarlez
- CNRS,
Solvay, LOF, UMR 5258, University of Bordeaux, F-33608 Pessac, France
| | - Clémence Le Cœur
- ICMPE
(UMR 7182), CNRS, UPEC, Université Paris Est, F- 94320 Thiais, France
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Le Cœur C, Combet S, Carrot G, Busch P, Teixeira J, Longeville S. Conformation of the Poly(ethylene Glycol) Chains in DiPEGylated Hemoglobin Specifically Probed by SANS: Correlation with PEG Length and in Vivo Efficiency. Langmuir 2015; 31:8402-8410. [PMID: 26153251 DOI: 10.1021/acs.langmuir.5b01121] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [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
Cell-free hemoglobin (Hb)-based oxygen carriers have long been proposed as blood substitutes but their clinical use remains tricky due to problems of inefficiency and/or toxicity. Conjugation of Hb with the biocompatible polymer poly(ethylene glycol) (PEG) greatly improved their performance. However, physiological data suggested a polymer molecular weight (Mw) threshold of about 10 kDa, beyond which the grafting of two PEG chains no longer improves efficiency and nontoxicity of diPEG/Hb conjugates. We used small-angle neutron scattering and contrast variation, which are the only techniques able to probe separately the conformation of PEG chains and Hb protein within the complex, to investigate the role of PEG chain conformation in diPEGylated Hb conjugates as a function of the polymer Mw. We found out that the structure of Hb tetramer is not modified by the polymer grafting. Similarly, with a constant grafting of two chains per protein, there is no significant change of the Gaussian conformation between free and grafted PEG below ∼10 kDa, the complex being well described by the "dumbbell" model. However, beyond that threshold, the radius of gyration of grafted PEG is significantly smaller than that of the free polymer, showing a compaction of the PEG chains, either in the "dumbbell" model or in the "shroud" one. In the latter model, the polymer may be wrapped on the surface of the protein spreading a protective "shielding" effect over a larger fraction of the protein. Both proposed models are in good agreement with the physiological data reported in the literature.
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Affiliation(s)
- Clémence Le Cœur
- †Laboratoire Léon-Brillouin (LLB), UMR 12 CEA-CNRS, CEA-Saclay, F-91191 Gif-sur-Yvette CEDEX, France
| | - Sophie Combet
- †Laboratoire Léon-Brillouin (LLB), UMR 12 CEA-CNRS, CEA-Saclay, F-91191 Gif-sur-Yvette CEDEX, France
| | - Géraldine Carrot
- †Laboratoire Léon-Brillouin (LLB), UMR 12 CEA-CNRS, CEA-Saclay, F-91191 Gif-sur-Yvette CEDEX, France
| | - Peter Busch
- ‡Forschungszentrum Jülich GmbH, Jülich Centre for Neutron Science (JCNS) at Heinz Maier-Leibnitz Zentrum (MLZ), Lichtenbergstrasse 1, D-85747 Garching, Germany
| | - José Teixeira
- †Laboratoire Léon-Brillouin (LLB), UMR 12 CEA-CNRS, CEA-Saclay, F-91191 Gif-sur-Yvette CEDEX, France
| | - Stéphane Longeville
- †Laboratoire Léon-Brillouin (LLB), UMR 12 CEA-CNRS, CEA-Saclay, F-91191 Gif-sur-Yvette CEDEX, France
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Tresset G, Tatou M, Le Cœur C, Zeghal M, Bailleux V, Lecchi A, Brach K, Klekotko M, Porcar L. Weighing polyelectrolytes packaged in viruslike particles. Phys Rev Lett 2014; 113:128305. [PMID: 25279650 DOI: 10.1103/physrevlett.113.128305] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2014] [Indexed: 06/03/2023]
Abstract
This Letter reports on the remarkable selectivity of capsid proteins for packaging synthetic polyelectrolytes in viruslike particles. By applying the contrast variation method in small-angle neutron scattering, we accurately estimated the mean mass of packaged polyelectrolytes ⟨Mp⟩ and that of the surrounding capsid ⟨Mcap⟩. Remarkably, the mass ratio ⟨Mp⟩/⟨Mcap⟩ was invariant for polyelectrolyte molecular weights spanning more than 2 orders of magnitude. To do so, capsids either packaged several chains simultaneously or selectively retained the shortest chains that could fit the capsid interior. Our data are in qualitative agreement with theoretical predictions based on free energy minimization and emphasize the importance of protein self-energy. These findings may give new insights into the nonspecific origin of genome selectivity for a number of viral systems.
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Affiliation(s)
- Guillaume Tresset
- Laboratoire de Physique des Solides, Université Paris-Sud, CNRS, 91400 Orsay, France
| | - Mouna Tatou
- Laboratoire de Physique des Solides, Université Paris-Sud, CNRS, 91400 Orsay, France
| | - Clémence Le Cœur
- Laboratoire de Physique des Solides, Université Paris-Sud, CNRS, 91400 Orsay, France
| | - Mehdi Zeghal
- Laboratoire de Physique des Solides, Université Paris-Sud, CNRS, 91400 Orsay, France
| | - Virginie Bailleux
- Laboratoire de Physique des Solides, Université Paris-Sud, CNRS, 91400 Orsay, France
| | - Amélie Lecchi
- Laboratoire de Physique des Solides, Université Paris-Sud, CNRS, 91400 Orsay, France
| | - Katarzyna Brach
- Institute of Physical and Theoretical Chemistry, Wrocław University of Technology, 27 Wybrzeże Wyspiańskiego, 50-370 Wrocław, Poland
| | - Magdalena Klekotko
- Institute of Physical and Theoretical Chemistry, Wrocław University of Technology, 27 Wybrzeże Wyspiańskiego, 50-370 Wrocław, Poland
| | - Lionel Porcar
- Institut Laue Langevin, 6 rue Jules Horowitz, 38042 Grenoble Cedex 9, France
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Tresset G, Decouche V, Bryche JF, Charpilienne A, Le Cœur C, Barbier C, Squires G, Zeghal M, Poncet D, Bressanelli S. Unusual self-assembly properties of Norovirus Newbury2 virus-like particles. Arch Biochem Biophys 2013; 537:144-52. [DOI: 10.1016/j.abb.2013.07.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2013] [Revised: 06/12/2013] [Accepted: 07/03/2013] [Indexed: 10/26/2022]
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