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Cuvellier JB, Andanson JM, Ballerat-Busserolles K, Hulin H, Artzner F, Malfreyt P, Ghoufi A. Importance of the Electrostatic Correlations in Surface Tension of Hydrated Reline Deep Eutectic Solvent from Combined Experiments and Molecular Dynamics Simulations. J Phys Chem B 2024; 128:4008-4020. [PMID: 38616779 DOI: 10.1021/acs.jpcb.3c08338] [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: 04/16/2024]
Abstract
In this study, the surface tension and the structure of hydrated reline are investigated by using diverse methods. Initially, the surface tension displays a nonlinear pattern as water content increases, decreasing until reaching 45 wt %, then gradually matching that of pure water. This fluctuation is associated with strong electrostatic correlations present in pure reline, which decrease as more water is added. Changes in surface tension reflect a shift from charge layering in pure reline to an increased interfacial hydrogen bonding as the water content rises. This shift causes the segregation of urea molecules into the bulk phase and a gradual anchoring of water molecules to the air-reline interface. An interesting observation is the antisurfactant effect, where heightened interfacial anchoring results in an unexpected increase in real contribution of surface tension. This, along with weakened electrostatic correlations beyond 45 wt % due to reinforced interfacial hydrogen bonding, contributes to the complex behavior of surface tension observed in this study.
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Affiliation(s)
| | - Jean-Michel Andanson
- Université Clermont Auvergne, CNRS, Clermont Auvergne INP, Institut de Chimie de Clermont-Ferrand, Clermont-Ferrand F-63000, France
| | - Karine Ballerat-Busserolles
- Université Clermont Auvergne, CNRS, Clermont Auvergne INP, Institut de Chimie de Clermont-Ferrand, Clermont-Ferrand F-63000, France
| | - Hyazann Hulin
- Univ Rennes, CNRS, IPR (Institut de Physique de Rennes)─UMR 6251, Rennes F-35000, France
| | - Franck Artzner
- Univ Rennes, CNRS, IPR (Institut de Physique de Rennes)─UMR 6251, Rennes F-35000, France
| | - Patrice Malfreyt
- Université Clermont Auvergne, CNRS, Clermont Auvergne INP, Institut de Chimie de Clermont-Ferrand, Clermont-Ferrand F-63000, France
| | - Aziz Ghoufi
- Univ Rennes, CNRS, IPR (Institut de Physique de Rennes)─UMR 6251, Rennes F-35000, France
- Univ Paris-East Creteil, CNRS, ICMPE (UMR 7182), 2 rue Henri Dunant, Thiais F-94320, France
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2
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Robin M, Djediat C, Bardouil A, Baccile N, Chareyron C, Zizak I, Fratzl P, Selmane M, Haye B, Genois I, Krafft J, Costentin G, Azaïs T, Artzner F, Giraud‐Guille M, Zaslansky P, Nassif N. Acidic Osteoid Templates the Plywood Structure of Bone Tissue. Adv Sci (Weinh) 2024; 11:e2304454. [PMID: 38115757 PMCID: PMC10916609 DOI: 10.1002/advs.202304454] [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] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 11/18/2023] [Indexed: 12/21/2023]
Abstract
Bone is created by osteoblasts that secrete osteoid after which an ordered texture emerges, followed by mineralization. Plywood geometries are a hallmark of many trabecular and cortical bones, yet the origin of this texturing in vivo has never been shown. Nevertheless, extensive in vitro work revealed how plywood textures of fibrils can emerge from acidic molecular cholesteric collagen mesophases. This study demonstrates in sheep, which is the preferred model for skeletal orthopaedic research, that the deeper non-fibrillar osteoid is organized in a liquid-crystal cholesteric geometry. This basophilic domain, rich in acidic glycosaminoglycans, exhibits low pH which presumably fosters mesoscale collagen molecule ordering in vivo. The results suggest that the collagen fibril motif of twisted plywood matures slowly through self-assembly thermodynamically driven processes as proposed by the Bouligand theory of biological analogues of liquid crystals. Understanding the steps of collagen patterning in osteoid-maturation processes may shed new light on bone pathologies that emerge from collagen physico-chemical maturation imbalances.
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Affiliation(s)
- Marc Robin
- CNRS, Sorbonne Université, Collège de FranceLaboratoire Chimie de la Matière Condensée de Paris (LCMCP)ParisF‐75005France
| | - Chakib Djediat
- Muséum National d'Histoire NaturelleUMR CNRS 7245, Bâtiment 39, CP 39, 57 rue CuvierParis75231France
| | - Arnaud Bardouil
- Université de Rennes, CNRSInstitut de Physique de Rennes (IPR)RennesF‐35000France
| | - Niki Baccile
- CNRS, Sorbonne Université, Collège de FranceLaboratoire Chimie de la Matière Condensée de Paris (LCMCP)ParisF‐75005France
| | - Camille Chareyron
- CNRS, Sorbonne Université, Collège de FranceLaboratoire Chimie de la Matière Condensée de Paris (LCMCP)ParisF‐75005France
| | - Ivo Zizak
- Helmholtz‐Zentrum Berlin für Materialien und Energie – Speicherring BESSY IIAlbert‐Einstein Str. 15D‐12349BerlinGermany
| | - Peter Fratzl
- Department of BiomaterialsMax Planck Institute of Colloids and Interfacesam Mühlenberg 114476PotsdamGermany
| | - Mohamed Selmane
- Institut des Matériaux de Paris CentreSorbonne UniversitéParisF‐75005France
| | - Bernard Haye
- CNRS, Sorbonne Université, Collège de FranceLaboratoire Chimie de la Matière Condensée de Paris (LCMCP)ParisF‐75005France
| | - Isabelle Genois
- CNRS, Sorbonne Université, Collège de FranceLaboratoire Chimie de la Matière Condensée de Paris (LCMCP)ParisF‐75005France
| | - Jean‐Marc Krafft
- Sorbonne Université, CNRSLaboratoire Réactivité de Surface (LRS)ParisF‐75005France
| | - Guylène Costentin
- Sorbonne Université, CNRSLaboratoire Réactivité de Surface (LRS)ParisF‐75005France
| | - Thierry Azaïs
- CNRS, Sorbonne Université, Collège de FranceLaboratoire Chimie de la Matière Condensée de Paris (LCMCP)ParisF‐75005France
| | - Franck Artzner
- Université de Rennes, CNRSInstitut de Physique de Rennes (IPR)RennesF‐35000France
| | - Marie‐Madeleine Giraud‐Guille
- CNRS, Sorbonne Université, Collège de FranceLaboratoire Chimie de la Matière Condensée de Paris (LCMCP)ParisF‐75005France
| | - Paul Zaslansky
- Department for OperativePreventive and Pediatric DentistryCharité – Universitätsmedizin BerlinAßmannshauser Str. 4–614197BerlinGermany
| | - Nadine Nassif
- CNRS, Sorbonne Université, Collège de FranceLaboratoire Chimie de la Matière Condensée de Paris (LCMCP)ParisF‐75005France
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3
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Miller J, Urvoas A, Gigant B, Ouldali M, Arteni A, Mesneau A, Valerio-Lepiniec M, Artzner F, Dujardin E, Minard P. Engineering of brick and staple components for ordered assembly of synthetic repeat proteins. J Struct Biol 2023; 215:108012. [PMID: 37567372 DOI: 10.1016/j.jsb.2023.108012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Revised: 07/27/2023] [Accepted: 08/07/2023] [Indexed: 08/13/2023]
Abstract
Synthetic ɑRep repeat proteins are engineered as Brick and Staple protein pairs that together self-assemble into helical filaments. In most cases, the filaments spontaneously form supercrystals. Here, we describe an expanded series of ɑRep Bricks designed to stabilize the interaction between consecutive Bricks, to control the length of the assembled multimers, or to alter the spatial distribution of the Staple on the filaments. The effects of these Brick modifications on the assembly, on the final filament structure and on the crystal symmetry are analyzed by biochemical methods, electron microscopy and small angle X-ray scattering. We further extend the concept of Brick/Staple protein origami by designing a new type of "Janus"-like Brick protein that is equally assembled by orthogonal staples binding its inner or outer surfaces and thus ending inside or outside the filaments. The relative roles of longitudinal and lateral associations in the assembly process are discussed. This set of results demonstrates important proofs-of-principle for engineering these remarkably versatile proteins toward nanometer-to-micron scale constructions.
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Affiliation(s)
- Jessalyn Miller
- Emory University Department of Chemistry, 1515 Dickey Drive, Atlanta, GA 30322, USA(1); Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Saclay, F-91198 Gif-sur-Yvette CEDEX, France
| | - Agathe Urvoas
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Saclay, F-91198 Gif-sur-Yvette CEDEX, France
| | - Benoit Gigant
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Saclay, F-91198 Gif-sur-Yvette CEDEX, France
| | - Malika Ouldali
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Saclay, F-91198 Gif-sur-Yvette CEDEX, France
| | - Ana Arteni
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Saclay, F-91198 Gif-sur-Yvette CEDEX, France
| | - Agnes Mesneau
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Saclay, F-91198 Gif-sur-Yvette CEDEX, France
| | - Marie Valerio-Lepiniec
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Saclay, F-91198 Gif-sur-Yvette CEDEX, France
| | - Franck Artzner
- Institut de Physique de Rennes (IPR), CNRS, UMR 6251, Université de Rennes 1, F-35042 Rennes, France
| | - Erik Dujardin
- Laboratoire Interdisciplinaire Carnot de Bourgogne, CNRS UMR 6303, Université de Bourgogne Franche-Comté, 21000 Dijon, France.
| | - Philippe Minard
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Saclay, F-91198 Gif-sur-Yvette CEDEX, France.
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4
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Moreaud L, Viollet S, Urvoas A, Valerio-Lepiniec M, Mesneau A, Li de la Sierra-Gallay I, Miller J, Ouldali M, Marcelot C, Balor S, Soldan V, Meriadec C, Artzner F, Dujardin E, Minard P. Design, synthesis, and characterization of protein origami based on self-assembly of a brick and staple artificial protein pair. Proc Natl Acad Sci U S A 2023; 120:e2218428120. [PMID: 36893280 PMCID: PMC10089216 DOI: 10.1073/pnas.2218428120] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [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: 10/28/2022] [Accepted: 02/03/2023] [Indexed: 03/11/2023] Open
Abstract
A versatile strategy to create an inducible protein assembly with predefined geometry is demonstrated. The assembly is triggered by a binding protein that staples two identical protein bricks together in a predictable spatial conformation. The brick and staple proteins are designed for mutual directional affinity and engineered by directed evolution from a synthetic modular repeat protein library. As a proof of concept, this article reports on the spontaneous, extremely fast and quantitative self-assembly of two designed alpha-repeat (αRep) brick and staple proteins into macroscopic tubular superhelices at room temperature. Small-angle X-ray scattering (SAXS) and transmission electron microscopy (TEM with staining agent and cryoTEM) elucidate the resulting superhelical arrangement that precisely matches the a priori intended 3D assembly. The highly ordered, macroscopic biomolecular construction sustains temperatures as high as 75 °C thanks to the robust αRep building blocks. Since the α-helices of the brick and staple proteins are highly programmable, their design allows encoding the geometry and chemical surfaces of the final supramolecular protein architecture. This work opens routes toward the design and fabrication of multiscale protein origami with arbitrarily programmed shapes and chemical functions.
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Affiliation(s)
- Laureen Moreaud
- Centre d’Elaboration des Matériaux et d’Etudes Structurales, CNRS UPR8011F-31055, Toulouse, France
| | - Sébastien Viollet
- CEA, CNRS, Institute for Integrative Biology of the Cell, Université Paris-Saclay91198, Gif-sur-Yvette, France
| | - Agathe Urvoas
- CEA, CNRS, Institute for Integrative Biology of the Cell, Université Paris-Saclay91198, Gif-sur-Yvette, France
| | - Marie Valerio-Lepiniec
- CEA, CNRS, Institute for Integrative Biology of the Cell, Université Paris-Saclay91198, Gif-sur-Yvette, France
| | - Agnès Mesneau
- CEA, CNRS, Institute for Integrative Biology of the Cell, Université Paris-Saclay91198, Gif-sur-Yvette, France
| | - Inès Li de la Sierra-Gallay
- CEA, CNRS, Institute for Integrative Biology of the Cell, Université Paris-Saclay91198, Gif-sur-Yvette, France
| | - Jessalyn Miller
- CEA, CNRS, Institute for Integrative Biology of the Cell, Université Paris-Saclay91198, Gif-sur-Yvette, France
- Department of Chemistry, Emory University, Atlanta, GA30322
| | - Malika Ouldali
- CEA, CNRS, Institute for Integrative Biology of the Cell, Université Paris-Saclay91198, Gif-sur-Yvette, France
| | - Cécile Marcelot
- Centre d’Elaboration des Matériaux et d’Etudes Structurales, CNRS UPR8011F-31055, Toulouse, France
| | - Stéphanie Balor
- Microscopie Electronique Intégrative Toulouse, Centre de Biologie Intégrative, Université de Toulouse, CNRS, 31062, Toulouse, France
| | - Vanessa Soldan
- Microscopie Electronique Intégrative Toulouse, Centre de Biologie Intégrative, Université de Toulouse, CNRS, 31062, Toulouse, France
| | - Cristelle Meriadec
- Institut de Physique de Rennes, CNRS, UMR6251, Université de Rennes 1F-35042, Rennes, France
| | - Franck Artzner
- Institut de Physique de Rennes, CNRS, UMR6251, Université de Rennes 1F-35042, Rennes, France
| | - Erik Dujardin
- Centre d’Elaboration des Matériaux et d’Etudes Structurales, CNRS UPR8011F-31055, Toulouse, France
- Laboratoire Interdisciplinaire Carnot de Bourgogne, CNRS, UMR6303, Université de Bourgogne Franche-Comté21000, Dijon, France
| | - Philippe Minard
- CEA, CNRS, Institute for Integrative Biology of the Cell, Université Paris-Saclay91198, Gif-sur-Yvette, France
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5
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Lopez C, David-Briand E, Lollier V, Mériadec C, Bizien T, Pérez J, Artzner F. Solubilization of free β-sitosterol in milk sphingomyelin and polar lipid vesicles as carriers: Structural characterization of the membranes and sphingosome morphology. Food Res Int 2023; 165:112496. [PMID: 36869506 DOI: 10.1016/j.foodres.2023.112496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 11/29/2022] [Accepted: 01/20/2023] [Indexed: 02/05/2023]
Abstract
High consumption of plant sterols reduces the risk of cardiovascular diseases in humans and provides health benefits. Increasing the amount of plant sterols in the diet is therefore necessary to reach the recommended daily dietary intake. However, food supplementation with free plant sterols is challenging because of their low solubility in fats and water. The objectives of this study were to investigate the capacity of milk-sphingomyelin (milk-SM) and milk polar lipids to solubilise β-sitosterol molecules in bilayer membranes organised as vesicles called sphingosomes. The thermal and structural properties of milk-SM containing bilayers composed of various amounts of β-sitosterol were examined by differential scanning calorimetry (DSC) and temperature-controlled X-ray diffraction (XRD), the molecular interactions were studied using the Langmuir film technique, the morphologies of sphingosomes and β-sitosterol crystals were observed by microscopy. We showed that the milk-SM bilayers devoid of β-sitosterol exhibited a gel to fluid Lα phase transition for Tm = 34.5 °C and formed facetted spherical sphingosomes below Tm. The solubilisation of β-sitosterol within milk-SM bilayers induced a liquid-ordered Lo phaseabove 25 %mol (1.7 %wt) β-sitosterol and a softening of the membranes leading to the formation of elongated sphingosomes. Attractive molecular interactions revealed a condensing effect of β-sitosterol on milk-SM Langmuir monolayers. Above 40 %mol (25.7 %wt) β-sitosterol, partitioning occured with the formation of β-sitosterol microcrystals in the aqueous phase. Similar results were obtained with the solubilization of β-sitosterol within milk polar lipid vesicles. For the first time, this study highlighted the efficient solubilization of free β-sitosterol within milk-SM based vesicles, which opens new market opportunities for the formulation of functional foods enriched in non-crystalline free plant sterols.
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Affiliation(s)
- Christelle Lopez
- INRAE, BIA, F-44316 Nantes, France; INRAE, STLO, F-35000 Rennes, France.
| | | | - Virginie Lollier
- INRAE, BIA, F-44316 Nantes, France; INRAE, PROBE Research Infrastructure, BIBS Facility, F-44316 Nantes, France
| | | | - Thomas Bizien
- Synchrotron Soleil, L'Orme des Merisiers, Saint-Aubin BP48, F-91192 Gif-sur-Yvette, France
| | - Javier Pérez
- Synchrotron Soleil, L'Orme des Merisiers, Saint-Aubin BP48, F-91192 Gif-sur-Yvette, France
| | - Franck Artzner
- IPR, UMR 6251, CNRS, University of Rennes 1, F-35042 Rennes, France
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Houard F, Cucinotta G, Guizouarn T, Suffren Y, Calvez G, Daiguebonne C, Guillou O, Artzner F, Mannini M, Bernot K. Metallogels: a novel approach for the nanostructuration of single-chain magnets. Mater Horiz 2023; 10:547-555. [PMID: 36426997 DOI: 10.1039/d2mh01158a] [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: 06/16/2023]
Abstract
In this study we demonstrate that single-chain magnets (SCMs) can be assembled in gel phase and transferred intact on surface. We take advantage of a family of SCMs based on TbIII ions and nitronyl-nitroxides radicals functionalized with short alkyl chains known to form crystalline supramolecular nanotubes interacting with heptane acting as crystallizing solvent. When the radicals are functionalized with long aliphatic chains a robust gel is formed with similar structural and functional properties respect to its crystalline parent. Indeed, a small-angle X-ray scattering (SAXS) study unambiguously demonstrates that the gel is made of supramolecular nanotubes: the high stability of the gel allows the determination from SAXS data of precise nanotube metrics such as diameter, helical pitch and monoclinic cell of the folded 2D crystal lattice along the tube direction. Additionally, static and dynamic magnetic investigations show the persistence of the SCM behavior in the metallogel. Last, on-surface gelation provides thick films as well as sub-monolayer deposits of supramolecular nanotubes on surface as evidenced by atomic force microscopy (AFM) observations. This paves the road toward magnetic materials and devices made of SCMs profiting of their isolation on surface as individual chains.
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Affiliation(s)
- Felix Houard
- Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, Université de Rennes 1, F-35000 Rennes, France.
| | - Guiseppe Cucinotta
- Dipartimento di Chimica "Ugo Schiff" (DICUS), Università degli Studi di Firenze, INSTM Research Unit of Firenze, Via della Lastruccia n.3-13, 50019 Sesto Fiorentino, FI, Italy.
| | - Thierry Guizouarn
- Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, Université de Rennes 1, F-35000 Rennes, France.
| | - Yan Suffren
- Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, Université de Rennes 1, F-35000 Rennes, France.
| | - Guillaume Calvez
- Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, Université de Rennes 1, F-35000 Rennes, France.
| | - Carole Daiguebonne
- Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, Université de Rennes 1, F-35000 Rennes, France.
| | - Olivier Guillou
- Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, Université de Rennes 1, F-35000 Rennes, France.
| | - Franck Artzner
- CNRS, IPR (Institut de Physique de Rennes), UMR 6251, Université de Rennes 1, F-35000 Rennes, France
| | - Matteo Mannini
- Dipartimento di Chimica "Ugo Schiff" (DICUS), Università degli Studi di Firenze, INSTM Research Unit of Firenze, Via della Lastruccia n.3-13, 50019 Sesto Fiorentino, FI, Italy.
| | - Kevin Bernot
- Univ Rennes, INSA Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, Université de Rennes 1, F-35000 Rennes, France.
- Institut Universitaire de France, 1 rue Descartes, 75005, Paris, France
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Amela-Cortes M, Dumait N, Artzner F, Cordier S, Molard Y. Flexible and Transparent Luminescent Cellulose-Transition Metal Cluster Composites. Nanomaterials (Basel) 2023; 13:580. [PMID: 36770542 PMCID: PMC9920715 DOI: 10.3390/nano13030580] [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] [Figures] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Revised: 01/25/2023] [Accepted: 01/29/2023] [Indexed: 06/18/2023]
Abstract
Red-NIR luminescent polymers are principally obtained from petroleum-based derivatives in which emitters, usually a critical raw material such as rare-earth or platinum group metal ions, are embedded. Considering the strong ecological impact of their synthesis and the major risk of fossil fuel energy shortage, there is an urgent need to find alternatives. We describe a luminescent nanocomposite based on red-NIR phosphorescent molybdenum nanoclusters, namely Cs2Mo6I8(OCOC2F5)6, embedded in an eco-friendly cellulose biopolymer matrix that is obtained by a simple solvent casting technique. While homogeneity is kept up to 20 wt% of cluster complex doping, annealing hybrids leads to a large increase of their emission efficiency, as demonstrated by quantum yield measurements.
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8
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Ludwig AD, Ourvois-Maloisel N, Saint-Jalmes A, Artzner F, Guégan JP, Tasseau O, Berrée F, Lemiègre L. Adjusting the water-sensitivity of sugar/boronate-based organogels. Soft Matter 2022; 18:9026-9036. [PMID: 36408633 DOI: 10.1039/d2sm01305c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
During the investigation of the water-sensitivity of (arylboronate alkylglucoside)-based organogels, we evaluated a series of twelve potential organogelators. They were synthesised in a single step from the corresponding arylboronic acids and alkylglucosides. Eight of them showed organogelation abilities in three solvents (toluene, cyclohexane, and ethyl myristate). Conformational minimisations of the potential organogelators permitted a clear relationship between the arylboronate orientation and the gelation effectiveness to be established. These gels were characterised by rheometry and SEM which revealed a gel-state originating from the self-assembly of the organogelators into long entangled fibres. SAXS confirmed the mode of packing in a hexagonal phase. Gels in toluene were found to be water-sensitive both after addition of a small amount of water and immersion into water. This study demonstrated that the main parameter impacting the water-sensitivity was the length of the alkyl chain at the anomeric position of the glucoside unit, much more than the functionalisation of an arylboronate moiety.
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Affiliation(s)
- Andreas D Ludwig
- Univ Rennes, Ecole Nationale Supérieure de Chimie de Rennes, CNRS, ISCR - UMR6226, F-35000 Rennes, France.
| | | | - Arnaud Saint-Jalmes
- Univ Rennes, CNRS, IPR (Institut de Physique de Rennes) - UMR 6251, F-35000 Rennes, France
| | - Franck Artzner
- Univ Rennes, CNRS, IPR (Institut de Physique de Rennes) - UMR 6251, F-35000 Rennes, France
| | - Jean-Paul Guégan
- Univ Rennes, Ecole Nationale Supérieure de Chimie de Rennes, CNRS, ISCR - UMR6226, F-35000 Rennes, France.
| | - Olivier Tasseau
- Univ Rennes, Ecole Nationale Supérieure de Chimie de Rennes, CNRS, ISCR - UMR6226, F-35000 Rennes, France.
| | - Fabienne Berrée
- Univ Rennes, Ecole Nationale Supérieure de Chimie de Rennes, CNRS, ISCR - UMR6226, F-35000 Rennes, France.
| | - Loïc Lemiègre
- Univ Rennes, Ecole Nationale Supérieure de Chimie de Rennes, CNRS, ISCR - UMR6226, F-35000 Rennes, France.
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9
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Alnemeh-Al Ali H, Griveau A, Artzner F, Dupont A, Lautram N, Jourdain M, Eyer J. Investigation on the self-assembly of the NFL-TBS.40-63 peptide and its interaction with gold nanoparticles as a delivery agent for glioblastoma. Int J Pharm X 2022; 4:100128. [PMID: 36204592 PMCID: PMC9529584 DOI: 10.1016/j.ijpx.2022.100128] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Accepted: 08/30/2022] [Indexed: 11/19/2022] Open
Affiliation(s)
| | - A. Griveau
- Univ Angers, Inserm, CNRS, MINT, SFR ICAT, F-49000 Angers, France
| | - F. Artzner
- Univ Rennes, CNRS, IPR (Institut de Physique de Rennes), UMR 6251, F-35000 Rennes, France
| | - A. Dupont
- Univ Rennes, CNRS, Inserm, BIOSIT-UMS 3480, US_S 018, Rennes, France
| | - N. Lautram
- Univ Angers, Inserm, CNRS, MINT, SFR ICAT, F-49000 Angers, France
| | - M.A. Jourdain
- Univ Angers, Inserm, CNRS, MINT, SFR ICAT, F-49000 Angers, France
| | - J. Eyer
- Univ Angers, Inserm, CNRS, MINT, SFR ICAT, F-49000 Angers, France
- Corresponding author.
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Chiechio RM, Ducarre S, Marets C, Dupont A, Even-Hernandez P, Pinson X, Dutertre S, Artzner F, Musumeci P, Ravel C, Faro MJL, Marchi V. Encapsulation of Luminescent Gold Nanoclusters into Synthetic Vesicles. Nanomaterials (Basel) 2022; 12:nano12213875. [PMID: 36364651 PMCID: PMC9655092 DOI: 10.3390/nano12213875] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Revised: 10/24/2022] [Accepted: 10/26/2022] [Indexed: 06/02/2023]
Abstract
Gold nanoclusters (Au NCs) are attractive luminescent nanoprobes for biomedical applications. In vivo biosensing and bioimaging requires the delivery of the Au NCs into subcellular compartments. In this view, we explore here the possible encapsulation of ultra-small-sized red and blue emitting Au NCs into liposomes of various sizes and chemical compositions. Different methods were investigated to prepare vesicles containing Au NCs in their lumen. The efficiency of the process was correlated to the structural and morphological aspect of the Au NCs' encapsulating vesicles thanks to complementary analyses by SAXS, cryo-TEM, and confocal microscopy techniques. Cell-like-sized vesicles (GUVs) encapsulating red or blue Au NCs were successfully obtained by an innovative method using emulsion phase transfer. Furthermore, exosome-like-sized vesicles (LUVs) containing Au NCs were obtained with an encapsulation yield of 40%, as estimated from ICP-MS.
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Affiliation(s)
- Regina M. Chiechio
- Institut des Sciences Chimiques de Rennes, CNRS UMR 6226, Université Rennes 1, F-35000 Rennes, France
- Dipartimento di Fisica e Astronomia “Ettore Majorana”, Università Di Catania, Via Santa Sofia 64, 95123 Catania, Italy
- IMM-CNR, Via S. Sofia 64, 95123 Catania, Italy
| | | | - Célia Marets
- Institut des Sciences Chimiques de Rennes, CNRS UMR 6226, Université Rennes 1, F-35000 Rennes, France
| | - Aurélien Dupont
- BIOSIT, Inserm, CNRS UMS 3480, Université Rennes1, US_S 018, F-35000 Rennes, France
| | - Pascale Even-Hernandez
- Institut des Sciences Chimiques de Rennes, CNRS UMR 6226, Université Rennes 1, F-35000 Rennes, France
| | - Xavier Pinson
- Microscopy Rennes Imaging Centre, SFR Biosit, CNRS UMS 3480—US INSERM 018, Université Rennes 1, F-35000 Rennes, France
| | - Stéphanie Dutertre
- Microscopy Rennes Imaging Centre, SFR Biosit, CNRS UMS 3480—US INSERM 018, Université Rennes 1, F-35000 Rennes, France
| | - Franck Artzner
- Institut de Physique, CNRS UMR 6251, Université Rennes 1, F-35000 Rennes, France
| | - Paolo Musumeci
- Dipartimento di Fisica e Astronomia “Ettore Majorana”, Università Di Catania, Via Santa Sofia 64, 95123 Catania, Italy
| | - Célia Ravel
- Service de Biologie de la Reproduction-CECOS, CHU Rennes, F-35000 Rennes, France
- Irset (Institut de Recherche en Santé, Environnement et Travail), Inserm, EHESP, Université Rennes 1, F-35000 Rennes, France
| | - Maria Jose Lo Faro
- Dipartimento di Fisica e Astronomia “Ettore Majorana”, Università Di Catania, Via Santa Sofia 64, 95123 Catania, Italy
- IMM-CNR, Via S. Sofia 64, 95123 Catania, Italy
| | - Valérie Marchi
- Institut des Sciences Chimiques de Rennes, CNRS UMR 6226, Université Rennes 1, F-35000 Rennes, France
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Lopez C, David-Briand E, Mériadec C, Bourgaux C, Pérez J, Artzner F. Milk sphingosomes as lipid carriers for α-tocopherol in aqueous foods: thermotropic phase behaviour and morphology. Food Res Int 2022; 162:112115. [DOI: 10.1016/j.foodres.2022.112115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Revised: 10/22/2022] [Accepted: 11/06/2022] [Indexed: 11/13/2022]
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Deruelle P, Sentilhes L, Ghesquière L, Desbrière R, Ducarme G, Attali L, Jarnoux A, Artzner F, Tranchant A, Schmitz T, Sénat MV. [Expert consensus from the College of French Gynecologists and Obstetricians: Management of nausea and vomiting of pregnancy and hyperemesis gravidarum]. Gynecol Obstet Fertil Senol 2022; 50:700-711. [PMID: 36150647 DOI: 10.1016/j.gofs.2022.09.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Accepted: 09/14/2022] [Indexed: 06/16/2023]
Abstract
OBJECTIVE To determine the management of patients with 1st trimester nausea and vomiting and hyperemesis gravidarum. METHODS A panel of experts participated in a formal consensus process, including focus groups and two Delphi rounds. RESULTS Hyperemesis gravidarum is distinguished from nausea and vomiting during pregnancy by weight loss≥5 % or signs of dehydration or a PUQE score≥7. Hospitalization is proposed when there is, at least, one of the following criteria: weight loss≥10%, one or more clinical signs of dehydration, PUQE (Pregnancy Unique Quantification of Emesis and nausea) score≥13, hypokalemia<3.0mmol/L, hyponatremia<120mmol/L, elevated serum creatinine>100μmol/L or resistance to treatment. Prenatal vitamins and iron supplementation should be stopped without stopping folic acid supplementation. Diet and lifestyle should be adjusted according to symptoms. Aromatherapy is not to be used. If the PUQE score is<6, even in the absence of proof of their benefit, ginger, pyridoxine (B6 vitamin), acupuncture or electrostimulation can be used, even in the absence of proof of benefit. It is proposed that drugs or combinations of drugs associated with the least severe and least frequent side effects should always be chosen for uses in 1st, 2nd or 3rd intention, taking into account the absence of superiority of a class over another to reduce the symptoms of nausea and vomiting of pregnancy and hypermesis gravidarum. To prevent Gayet Wernicke encephalopathy, Vitamin B1 must systematically be administered for hyperemesis gravidarum needing parenteral rehydration. Patients hospitalized for hyperemesis gravidarum should not be placed in isolation (put in the dark, confiscation of the mobile phone or ban on visits, etc.). Psychological support should be offered to all patients with hyperemesis gravidarum as well as information on patient' associations involved in supporting these women and their families. When returning home after hospitalization, care will be organized around a referring doctor. CONCLUSION This work should contribute to improving the care of women with hyperemesis gravidarum. However, given the paucity in number and quality of the literature, researchers must invest in the field of nausea and vomiting in pregnancy, and HG to identify strategies to improve the quality of life of women with nausea and vomiting in pregnancy or hyperemesis gravidarum.
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Affiliation(s)
- P Deruelle
- UNISTRA, département de gynécologie-obstétrique, hôpitaux universitaires de Strasbourg, 67000 Strasbourg cedex, France.
| | - L Sentilhes
- Department of obstetrics and gynecology, Bordeaux university hospital, Bordeaux, France
| | - L Ghesquière
- ULR 2694 - METRICS - évaluation des technologies de santé et des pratiques médicales, university Lille, CHU Lille, 59000 Lille, France; Department of obstetrics, CHU Lille, 59000 Lille, France
| | | | - G Ducarme
- Service de gynécologie obstétrique, centre hospitalier départemental Vendée, 85000 La Roche-sur-Yon, France
| | - L Attali
- UNISTRA, département de gynécologie-obstétrique, hôpitaux universitaires de Strasbourg, 67000 Strasbourg cedex, France
| | | | - F Artzner
- Association 9mois avec ma bassine, France
| | - A Tranchant
- Association de lutte contre l'hyperémèse gravidique, France
| | - T Schmitz
- Université Paris Cité, 75006 Paris, France; Service de gynécologie obstétrique, hôpital Robert-Debré, Assistance publique-Hôpitaux de Paris, Paris, France
| | - M-V Sénat
- Department of obstetrics and gynecology, Bicêtre hospital, Assistance publique-Hôpitaux de Paris, Le Kremlin-Bicêtre, France
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Chiechio RM, Ducarre S, Moulin G, Dupont A, Marets C, Even-Hernandez P, Artzner F, Musumeci P, Franzò G, Ravel C, LoFaro MJ, Marchi V. Luminescent Gold Nanoclusters Interacting with Synthetic and Biological Vesicles. J Phys Chem Lett 2022; 13:6935-6943. [PMID: 35876058 DOI: 10.1021/acs.jpclett.2c01071] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
According to their high electron density and ultrasmall size, gold nanoclusters (AuNCs) have unique luminescence and photoelectrochemical properties that make them very attractive for various biomedical fields. These applications require a clear understanding of their interaction with biological membranes. Here we demonstrate the ability of the AuNCs as markers for lipidic bilayer structures such as synthetic liposomes and biological extracellular vesicles (EVs). The AuNCs can selectively interact with liposomes or EVs through an attractive electrostatic interaction as demonstrated by zetametry and fluorescence microscopy. According to the ratio of nanoclusters to vesicles, the lipidic membranes can be fluorescently labeled without altering their thickness until charge reversion, the AuNCs being located at the level of the phosphate headgroups. In presence of an excess of AuNCs, the vesicles tend to adhere and aggregate. The strong adsorption of AuNCs results in the formation of a lamellar phase as demonstrated by cryo-transmission electron microscopy and small-angle X-ray scattering techniques.
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Affiliation(s)
- Regina M Chiechio
- Université Rennes 1, CNRS UMR 6226, Institut des Sciences Chimiques de Rennes, Avenue du général Leclerc, 35042 Rennes Cedex, France
- Dipartimento di Fisica e Astronomia "Ettore Majorana", Università Di Catania, Via Santa Sofia 64, 95123 Catania, Italy
- IMM-CNR, Via S. Sofia 64, 95123 Catania, Italy
| | - Solène Ducarre
- Université Rennes 1, CNRS UMR 6226, Institut des Sciences Chimiques de Rennes, Avenue du général Leclerc, 35042 Rennes Cedex, France
| | - Grégory Moulin
- Université Rennes 1, CNRS UMR 6226, Institut des Sciences Chimiques de Rennes, Avenue du général Leclerc, 35042 Rennes Cedex, France
- CHU Rennes, Service de Biologie de la Reproduction-CECOS, 35000 Rennes, France
| | - Aurélien Dupont
- CNRS, Inserm, BIOSIT - UMS 3480, Univ Rennes, US_S 018, F-35000 Rennes, France
| | - Célia Marets
- Université Rennes 1, CNRS UMR 6226, Institut des Sciences Chimiques de Rennes, Avenue du général Leclerc, 35042 Rennes Cedex, France
| | - Pascale Even-Hernandez
- Université Rennes 1, CNRS UMR 6226, Institut des Sciences Chimiques de Rennes, Avenue du général Leclerc, 35042 Rennes Cedex, France
| | - Franck Artzner
- Université Rennes 1, CNRS UMR 6251, Institut de Physique de Rennes, Avenue du général Leclerc, 35042 Rennes Cedex, France
| | - Paolo Musumeci
- Dipartimento di Fisica e Astronomia "Ettore Majorana", Università Di Catania, Via Santa Sofia 64, 95123 Catania, Italy
| | | | - Célia Ravel
- CHU Rennes, Service de Biologie de la Reproduction-CECOS, 35000 Rennes, France
- Univ Rennes, Inserm, EHESP, Irset (Institut de Recherche en Santé, Environnement et Travail), UMR_S 1085, F-35000 Rennes, France
| | - Maria José LoFaro
- Dipartimento di Fisica e Astronomia "Ettore Majorana", Università Di Catania, Via Santa Sofia 64, 95123 Catania, Italy
- IMM-CNR, Via S. Sofia 64, 95123 Catania, Italy
| | - Valérie Marchi
- Université Rennes 1, CNRS UMR 6226, Institut des Sciences Chimiques de Rennes, Avenue du général Leclerc, 35042 Rennes Cedex, France
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Kergomard J, Carrière F, Paboeuf G, Artzner F, Barouh N, Bourlieu C, Vié V. Interfacial organization and phase behavior of mixed galactolipid-DPPC-phytosterol assemblies at the air-water interface and in hydrated mesophases. Colloids Surf B Biointerfaces 2022; 217:112646. [PMID: 35763897 DOI: 10.1016/j.colsurfb.2022.112646] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 05/19/2022] [Accepted: 06/14/2022] [Indexed: 11/26/2022]
Abstract
The structural behavior of model assemblies composed of monogalactosyldiacylglycerol (MGDG) and digalactosyldiacylglycerol (DGDG), the two main galactolipids found in plants, was investigated at the air/water interface and in aqueous dispersion. To approach the composition of the natural photosynthetic membranes, tunable Langmuir model membrane of galactolipids (GL) were used, and were complexified to form either heterogenous binary or ternary assemblies of GL, phospholipids (PL), and phytosterols (pS). The impact of pS, 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC) or both on the structural properties of GL membrane was studied. The nature of the interactions between the different molecules was investigated using biophysical characterizations (ellipsometry, tensiometry, atomic force microscopy). In addition, the phase behavior was determined by SAXS analysis on the model assemblies in aqueous dispersions. Results revealed the good interfacial stability of these specific plant membrane lipids. The morphology of the GL film was characteristic of a fluid phase, with an interfacial roughness induced by the intercalation of monogalactosyl and digalactosyl polar heads of MGDG and DGDG, respectively. A phase heterogeneity in the monolayer was induced by the addition of DPPC and/or pS, which resulted in the modification of galactolipid organization and headgroup interactions. These structural changes were confirmed by SAXS analysis, showing more favorable interactions between MGDG and DPPC than between DGDG and DPPC in aqueous dispersion. This phenomenon was exacerbated in the presence of pS.
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Affiliation(s)
- Jeanne Kergomard
- IPR Institute of Physics, UMR UR1 CNRS 6251, Rennes 1 University, France; INRAE/CIRAD/UM/Institut Agro Montpellier UMR 1208 IATE, France
| | - Frédéric Carrière
- Aix-Marseille Université, CNRS, UMR7281 Bioénergétique et Ingénierie des Protéines, Marseille, France
| | - Gilles Paboeuf
- IPR Institute of Physics, UMR UR1 CNRS 6251, Rennes 1 University, France
| | - Franck Artzner
- IPR Institute of Physics, UMR UR1 CNRS 6251, Rennes 1 University, France
| | - Nathalie Barouh
- CIRAD, UMR QUALISUD, F34398 Montpellier, France; Qualisud, Univ Montpellier, Avignon Université, CIRAD, Institut Agro, Université de La Réunion, Montpellier, France
| | - Claire Bourlieu
- INRAE/CIRAD/UM/Institut Agro Montpellier UMR 1208 IATE, France
| | - Véronique Vié
- IPR Institute of Physics, UMR UR1 CNRS 6251, Rennes 1 University, France; Univ Rennes 1, CNRS, ScanMAT - UMS 2001, F-35042 Renne, France.
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Galangau O, Daou D, El Beyrouti N, Caytan E, Mériadec C, Artzner F, Rigaut S. Molecular Engineering onto Ru II Bis(1,2-diphenylphosphinoethane) Synthon: Toward an Original Organometallic Gelator. Inorg Chem 2021; 60:11474-11484. [PMID: 34292721 DOI: 10.1021/acs.inorgchem.1c01488] [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: 11/29/2022]
Abstract
In this article, we report the successful molecular engineering of Ru bis-acetylides that led for the first time to a gelator and more specifically in aromatic solvents. By means of a nonlinear ligand and an extended aromatic platform, the bulky Ru bis-acetylides were able to self-assemble into lamellar structures as evidenced by scanning electron microscopy (SEM) in benzene, toluene, and o- and m-xylene, which in turn induced gelation of the solution with a critical gelation concentration of 30 mg/mL. Nuclear magnetic resonance (NMR), variable temperature (VT)-NMR, and Fourier transform infrared (FT-IR) spectroscopies evidenced that hydrogen bonds are mainly responsible for the self-organization. VT-NMR and small-angle X-ray scattering (SAXS) have also suggested that the pro-ligand and the complex stack in different ways.
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Affiliation(s)
- Olivier Galangau
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes)-UMR 6226, Rennes F-35000, France
| | - Dania Daou
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes)-UMR 6226, Rennes F-35000, France
| | - Nour El Beyrouti
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes)-UMR 6226, Rennes F-35000, France
| | - Elsa Caytan
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes)-UMR 6226, Rennes F-35000, France
| | - Cristelle Mériadec
- Univ Rennes, CNRS, IPR (Institut de Physique de Rennes)-UMR 6251, Rennes F-35000, France
| | - Franck Artzner
- Univ Rennes, CNRS, IPR (Institut de Physique de Rennes)-UMR 6251, Rennes F-35000, France
| | - Stéphane Rigaut
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes)-UMR 6226, Rennes F-35000, France
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Lopez C, Mériadec C, David-Briand E, Dupont A, Bizien T, Artzner F, Riaublanc A, Anton M. Loading of lutein in egg-sphingomyelin vesicles as lipid carriers: Thermotropic phase behaviour, structure of sphingosome membranes and lutein crystals. Food Res Int 2020; 138:109770. [PMID: 33292950 DOI: 10.1016/j.foodres.2020.109770] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2020] [Revised: 07/30/2020] [Accepted: 09/30/2020] [Indexed: 10/23/2022]
Abstract
Lutein is a xanthophyll carotenoid provided exclusively by the diet, that has protective functions and beneficial effects on human health. Supplementation in lutein is necessary to reach the recommended daily dietary intake. However, the introduction of lutein into foods and beverages is a real challenge since this lipophilic nutrient has a poor aqueous solubility and a low bioavailability. In this study, we investigated the capacity of egg-sphingomyelin (ESM) vesicles called sphingosomes to solubilise lutein into the bilayers. The thermal and structural properties of ESM bilayers were examined in presence of various amounts of lutein by differential scanning calorimetry (DSC) and temperature-controlled X-ray diffraction (XRD), the structures of sphingosomes and lutein crystals were observed by microscopic techniques. ESM bilayers were in the fluid Lα phase above the phase transition temperature Tm = 39.6 °C and in the lamellar ripple Pβ' phase below Tm where ESM sphingosomes exhibited ondulations and were facetted. Lutein molecules were successfully incorporated into the ESM bilayers where they induced a structural disorganisation. For ESM/lutein 90/10 %mol (91.8/8.2 %wt; 89 mg lutein / g ESM), lutein partitioning occured with the formation of lutein crystals in the aqueous phase together with lutein-loaded ESM vesicles. This study highlighted the capacity of new lipid carriers such as egg-sphingosomes to solubilise lutein and opens perspectives for the formulation of effective lutein-fortified functionnal foods and beverages providing health benefits.
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Affiliation(s)
- Christelle Lopez
- INRAE, BIA, 44316 Nantes, France; INRAE, STLO, 35000 Rennes, France.
| | | | | | - Aurélien Dupont
- Univ Rennes, CNRS, Inserm, BIOSIT - UMS 3480, US_S 018, 35000 Rennes, France
| | - Thomas Bizien
- Synchrotron Soleil, L'Orme des Merisiers, Saint-Aubin BP48, 91192 Gif-sur-Yvette, France
| | - Franck Artzner
- IPR, UMR 6251, CNRS, University of Rennes 1, 35042 Rennes, France
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Petitprez K, Guillaume S, Mattuizzi A, Arnal M, Artzner F, Bernard C, Bonnin M, Bouvet L, Caron FM, Chevalier I, Daussy-Urvoy C, Ducloy-Bouthorsc AS, Garnier JM, Keita-Meyer H, Lavillonnière J, Lejeune-Sadaa V, Leray C, Morandeau A, Morau E, Nadjafizade M, Pizzagalli F, Schantz C, Schmitz T, Shojai R, Hédon B, Sentilhes L. [Normal childbirth: physiologic labor support and medical procedures. Guidelines of the French National Authority for Health (HAS) with the collaboration of the French College of Gynaecologists and Obstetricians (CNGOF) and the French College of Midwives (CNSF) -- Text of the Guidelines (short text)]. Gynecol Obstet Fertil Senol 2020; 48:873-882. [PMID: 33011381 DOI: 10.1016/j.gofs.2020.09.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
OBJECTIVE The objective of these guidelines is to define for women at low obstetric risk modalities that respect the physiology of delivery and guarantee the quality and safety of maternal and newborn care. METHODS These guidelines were made by a consensus of experts based on an analysis of the scientific literature and the French and international recommendations available on the subject. RESULTS It is recommended to conduct a complete initial examination of the woman in labor at admission (consensus agreement). The labor will be monitored using a partogram that is a useful traceability tool (consensus agreement). A transvaginal examination may be offered every two to four hours during the first stage of labor and every hour during the second stage of labor or before if the patient requests it, or in case of a warning sign. It is recommended that if anesthesia is required, epidural or spinal anesthesia should be used to prevent bronchial inhalation (grade A). The consumption of clear fluids is permitted throughout labor in patients with a low risk of general anesthesia (grade B). It is recommended to carry out a "low dose" epidural analgesia that respects the experience of delivery (grade A). It is recommended to maintain the epidural analgesia through a woman's self-administration pump (grade A). It is recommended to give the woman the choice of continuous (by cardiotocography) or discontinuous (by cardiotocography or intermittent auscultation) monitoring if the conditions of maternity organization and the permanent availability of staff allow it and, after having informed the woman of the benefits and risks of each technique (consensus agreement). In the active phase of the first stage of labor, the dilation rate is considered abnormal if it is less than 1cm/4h between 5 and 7cm or less than 1cm/2h above 7cm (level of Evidence 2). It is then recommended to propose an amniotomy if the membranes are intact or an oxytocin administration if the membranes are already ruptured, and the uterine contractions considered insufficient (consensus agreement). It is recommended not to start expulsive efforts as soon as complete dilation is identified, but to let the presentation of the fetus drop (grade A). It is recommended to inform the gynecologist-obstetrician in case of nonprogression of the fetus after two hours of complete dilation with sufficient uterine dynamics (consensus agreement). It is recommended not to use abdominal expression (grade B). It is recommended to carry out preventive administration of oxytocin at 5 or 10 IU to prevent PPH after vaginal delivery (grade A). In the case of placental retention, it is recommended to perform a manual removal of the placenta (grade A). In the absence of bleeding, it should be performed 30minutes but not more than 60minutes after delivery (consensus agreement). It is recommended to assess at birth the breathing or screaming, and tone of the newborn to quickly determine if resuscitation is required (consensus agreement). If the parameters are satisfactory (breathing present, screaming frankly, and normal tonicity), it is recommended to propose to the mother that she immediately place the newborn skin-to-skin with her mother if she wishes, with a monitoring protocol (grade B). Delayed cord clamping is recommended beyond the first 30seconds in neonates, not requiring resuscitation (grade C). It is recommended that the first oral dose (2mg) of vitamin K (consensus agreement) be given systematically within two hours of birth. CONCLUSION These guidelines allow women at low obstetric risk to benefit from a better quality of care and optimal safety conditions while respecting the physiology of delivery.
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Affiliation(s)
- K Petitprez
- Service des bonnes pratiques professionnelles, Haute Autorité de santé, 93218 Saint-Denis, France
| | - S Guillaume
- Service de gynécologie-obstétrique, hôpital Necker-Enfants-Malades, Assistance publique des Hôpitaux de Paris, 75015 Paris, France
| | - A Mattuizzi
- Service de gynécologie-obstétrique, maternité Aliénor d'Aquitaine, centre hospitalier universitaire de Bordeaux, place Amélie-Raba-Léon, 33000 Bordeaux, France
| | | | - F Artzner
- Collectif inter-associatif autour de la naissance (CIANE), 93100 Montreuil, France
| | - C Bernard
- Collectif inter-associatif autour de la naissance (CIANE), 75011 Paris, France
| | - M Bonnin
- Service d'anesthésie-réanimation, hôpital d'Estaing, centre hospitalier universitaire de Clermont-Ferrand, 63100 Clermont-Ferrand, France
| | - L Bouvet
- Service d'anesthésie-réanimation, hôpital Femme-Mère-Enfant, hospices civils de Lyon, 69000 Lyon, France
| | - F-M Caron
- Pôle femme enfant Victor-Pauchet, centre hospitalier universitaire d'Amiens, 80080 Amiens, France
| | | | | | - A-S Ducloy-Bouthorsc
- Service d'anesthésie-réanimation, maternité Jeanne-de-Flandre, centre hospitalier régional universitaire de Lille, 59000 Lille, France
| | | | - H Keita-Meyer
- Service d'anesthésie-réanimation, hôpital Necker-Enfants-Malades, Assistance publique des Hôpitaux de Paris, 75015 Paris, France
| | | | - V Lejeune-Sadaa
- Service de gynécologie-obstétrique, centre hospitalier d'Auch, 32008 Auch, France
| | - C Leray
- Service de gynécologie-obstétrique, hôpital Cochin, maternité Port-Royal, Assistance publique des Hôpitaux de Paris, 75014 Paris, France
| | | | - E Morau
- Service d'anesthésie-réanimation, centre hospitalier de Narbonne, 11100 Narbonne, France
| | - M Nadjafizade
- École de sages-femmes, centre hospitalier régional universitaire de Nancy, 54035 Nancy, France
| | - F Pizzagalli
- Service de gynécologie-obstétrique, hôpital Antoine-Béclère, 92140 Clamart, France
| | - C Schantz
- CEPED, IRD, université Paris Descartes, Inserm, équipe SAGESUD, 75006 Paris, France
| | - T Schmitz
- Service de gynécologie-obstétrique, hôpital Robert-Debré, Assistance publique des Hôpitaux de Paris, 75019 Paris, France
| | - R Shojai
- Service de gynécologie-obstétrique, clinique de l'étoile, 13100 Aix-en-Provence, France
| | - B Hédon
- Service de gynécologie-obstétrique, centre hospitalier universitaire de Montpellier, 34295 Montpellier, France
| | - L Sentilhes
- Service de gynécologie-obstétrique, maternité Aliénor d'Aquitaine, centre hospitalier universitaire de Bordeaux, place Amélie-Raba-Léon, 33000 Bordeaux, France.
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Pinzan F, Artzner F, Ghoufi A. Force-Field Simulations of a Hydrated Lanreotide-Based Derivative: Hydration, Dynamics, and Numerical Evidence of Self-Assembly in Dimers. ACS Omega 2020; 5:25423-25431. [PMID: 33043222 PMCID: PMC7542832 DOI: 10.1021/acsomega.0c03852] [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] [Figures] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Accepted: 09/10/2020] [Indexed: 06/11/2023]
Abstract
Recently, self-organization of the cyclic octapeptide lanreotide and lanreotide-based derivatives in a nanotube to from a dimer structure has been experimentally evidenced. While the nature of the interactions between both monomers has been strongly investigated no molecular details of the hydration of the monomer and the formation of the dimer have been provided. Using molecular dynamics simulations, this work focuses on the structure, hydration, and dynamics of water and an analog of lanreotide. To do so, several models of monomers based on different schemes of partial charges and electrostatic interaction calculations are considered. By comparison with the experiments, we show that the model based on the combination of the AMBER force-field, CHELPG charge calculation, Ewald sum is the most relevant. Additionally, by mapping the interfacial hydration of the lanreotide monomer we evidence a heterogeneous surface in terms of hydrophilicity involving heterogeneous hydration. Furthermore, we show a slowdown in the translational dynamics of water molecules located close to the lanreotide surface. We also provide the molecular details of the self-assembly in the dimer in terms of structure, hydration, and energy.
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Ludwig AD, Saint-Jalmes A, Mériadec C, Artzner F, Tasseau O, Berrée F, Lemiègre L. Boron Effect on Sugar-Based Organogelators. Chemistry 2020; 26:13927-13934. [PMID: 32579731 DOI: 10.1002/chem.202001970] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [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: 04/22/2020] [Revised: 06/10/2020] [Indexed: 01/03/2023]
Abstract
The reaction of several alkylglucosides with phenyl boronic acid permitted easy access to a series of alkylglucoside phenyl boronate derivatives. This type of compound has structures similar to those of known benzylidene glucoside organogelators except for the presence of a boronate function in place of the acetal one. Low to very low concentrations of these amphiphilic molecules produced gelation of several organic solvents. The rheological properties of the corresponding soft materials characterized them as elastic solids. They were further characterized by SEM to obtain more information on their morphologies and by SAXS to determine the type of self-assembly involved within the gels. The sensitivity of the boronate function towards hydrolysis was also investigated. We demonstrated that a small amount of water (5 % v/v) was sufficient to disrupt the organogels leading to the original alkylglucoside and phenyl boronic acid; an important difference with the stable benzylidene-based organogelators. Such water-sensitive boronated organogelators could be suitable substances for the preparation of smart soft material for topical drug delivery.
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Affiliation(s)
- Andreas D Ludwig
- Ecole Nationale Supérieure de Chimie de Rennes, CNRS, ISCR-UMR6226, Université de Rennes, 35000, Rennes, France
| | - Arnaud Saint-Jalmes
- CNRS, IPR (Institut de Physique de Rennes)-UMR 6251, Université de Rennes, 35000, Rennes, France
| | - Cristelle Mériadec
- CNRS, IPR (Institut de Physique de Rennes)-UMR 6251, Université de Rennes, 35000, Rennes, France
| | - Franck Artzner
- CNRS, IPR (Institut de Physique de Rennes)-UMR 6251, Université de Rennes, 35000, Rennes, France
| | - Olivier Tasseau
- Ecole Nationale Supérieure de Chimie de Rennes, CNRS, ISCR-UMR6226, Université de Rennes, 35000, Rennes, France
| | - Fabienne Berrée
- Ecole Nationale Supérieure de Chimie de Rennes, CNRS, ISCR-UMR6226, Université de Rennes, 35000, Rennes, France
| | - Loïc Lemiègre
- Ecole Nationale Supérieure de Chimie de Rennes, CNRS, ISCR-UMR6226, Université de Rennes, 35000, Rennes, France
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Fernandez M, Urvoas A, Even-Hernandez P, Burel A, Mériadec C, Artzner F, Bouceba T, Minard P, Dujardin E, Marchi V. Hybrid gold nanoparticle-quantum dot self-assembled nanostructures driven by complementary artificial proteins. Nanoscale 2020; 12:4612-4621. [PMID: 32043516 DOI: 10.1039/c9nr09987e] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Hybrid nanostructures are constructed by the direct coupling of fluorescent quantum dots and plasmonic gold nanoparticles. Self-assembly is directed by the strong affinity between two artificial α-repeat proteins that are introduced in the capping layers of the nanoparticles at a controlled surface density. The proteins have been engineered to exhibit a high mutual affinity, corresponding to a dissociation constant in the nanomolar range, towards the protein-functionalized quantum dots and gold nanoparticles. Protein-mediated self-assembly is evidenced by surface plasmon resonance and gel electrophoresis. The size and the structure of colloidal superstructures of complementary nanoparticles are analyzed by transmission electron microscopy and small angle X-ray scattering. The size of the superstructures is determined by the number of proteins per nanoparticle. The well-defined geometry of the rigid protein complex sets a highly uniform interparticle distance of 8 nm that affects the emission properties of the quantum dots in the hybrid ensembles. Our results open the route to the design of hybrid emitter-plasmon colloidal assemblies with controlled near-field coupling and better optical response.
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Affiliation(s)
- Maxence Fernandez
- University Rennes 1, Institute of Chemical Sciences, UMR 6226 CNRS, Campus Beaulieu, F-35042 Rennes, France.
| | - Agathe Urvoas
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Univ. Paris-Sud, Université Paris-Saclay, 91198 Gif-sur-Yvette Cedex, France
| | - Pascale Even-Hernandez
- University Rennes 1, Institute of Chemical Sciences, UMR 6226 CNRS, Campus Beaulieu, F-35042 Rennes, France.
| | - Agnès Burel
- University Rennes 1, Microscopy Rennes Imaging Center, UMS3480 BIOSIT, Campus Villejean, Rennes, France
| | - Cristelle Mériadec
- University Rennes 1, Institut de Physique de Rennes, UMR 6251 CNRS, Campus Beaulieu, F-35042 Rennes, France
| | - Franck Artzner
- University Rennes 1, Institut de Physique de Rennes, UMR 6251 CNRS, Campus Beaulieu, F-35042 Rennes, France
| | - Tahar Bouceba
- Sorbonne Université, CNRS, Institut de Biologie Paris-Seine (IBPS), Protein engineering platform, Molecular Interaction Service, F-75005 Paris, France
| | - Philippe Minard
- Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Univ. Paris-Sud, Université Paris-Saclay, 91198 Gif-sur-Yvette Cedex, France
| | - Erik Dujardin
- Groupe NanoSciences-CEMES, CNRS UPR 8011, 29 rue J. Marvig, B.P. 94347, F-31055 Toulouse, France
| | - Valérie Marchi
- University Rennes 1, Institute of Chemical Sciences, UMR 6226 CNRS, Campus Beaulieu, F-35042 Rennes, France.
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21
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Pinzan F, Artzner F, Ghoufi A. Anomalous dynamics of water at the octopeptide lanreotide surface. RSC Adv 2020; 10:33903-33910. [PMID: 35519054 PMCID: PMC9056749 DOI: 10.1039/d0ra06237e] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Accepted: 08/25/2020] [Indexed: 11/21/2022] Open
Abstract
This work reports the study of water dynamics close to the cyclic octapeptide lanreotide from atomistic simulations of hydrated lanreotide, a cyclic octapeptide. Calculation of the hydrogen bonds between water molecules allows mapping of the hydrophilic regions of lanreotide. Whereas a super-diffusivity of the interfacial water molecules is established, a slowdown in rotational dynamics is observed, involving a decoupling between both processes. Acceleration in translation dynamics is connected to the hopping process between hydrophilic zones. Microscopically, this is correlated with the weakness of the interfacial hydrogen bonding network due to a hydrophobic interface at the origin of the interfacial sliding of water molecules. Heterogeneous rotational dynamics of water molecules close the lanreotide surface is evidenced and connected to heterogeneous hydration. Molecular dynamics simulations of a hydrated mutated lanreotide, a cyclic octapeptide, were carried out to characterize its hydration state. We studied the water dynamics close to the peptide using atomistic simulations.![]()
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Affiliation(s)
- Florian Pinzan
- Institut de Physique de Rennes
- UMR CNRS 6251
- Université Rennes 1
- 35042 Rennes
- France
| | - Franck Artzner
- Institut de Physique de Rennes
- UMR CNRS 6251
- Université Rennes 1
- 35042 Rennes
- France
| | - Aziz Ghoufi
- Institut de Physique de Rennes
- UMR CNRS 6251
- Université Rennes 1
- 35042 Rennes
- France
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22
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Ducarme G, Pizzoferrato A, de Tayrac R, Schantz C, Thubert T, Le Ray C, Riethmuller D, Verspyck E, Gachon B, Pierre F, Artzner F, Jacquetin B, Fritel X. Perineal prevention and protection in obstetrics: CNGOF clinical practice guidelines. J Gynecol Obstet Hum Reprod 2019; 48:455-460. [DOI: 10.1016/j.jogoh.2018.12.002] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2018] [Accepted: 12/10/2018] [Indexed: 11/16/2022]
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Chervy P, Petcut C, Rault D, Meriadec C, Bizien T, François K, Richard J, Chassaing C, Benamar N, Artzner F, Paternostre M. Organic Nanoscrolls from Electrostatic Interactions between Peptides and Lipids: Assembly Steps and Structure. Langmuir 2019; 35:10648-10657. [PMID: 31330110 DOI: 10.1021/acs.langmuir.9b01542] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
An important aspect of cells is their shape flexibility that gives them motion but also a high adaptation versatility to their environment. This shape versatility is mediated by different types of protein-membrane interactions among which electrostatic plays an important role. In the present work we examined the interaction between a small dicationic peptide, that possesses self-assembly properties, and lipid model membranes. The peptide, lanreotide, spontaneously forms nanotubes in water that have a strictly uniform diameter. In the current work, we show that the interaction between the cationic peptide and negatively charged bilayers of lipids induces the formation of myelin sheath-like structures that we call nanoscrolls. By deciphering the different steps of formation and the molecular structure of the self-assembly, we show how electrostatics modify the spontaneous peptide and lipid way of packing.
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Affiliation(s)
- Pierre Chervy
- I2BC, Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, Université Paris-Saclay , 91198 , Gif-sur-Yvette cedex , France
- Ipsen , 28100 Dreux , France
| | - Cristina Petcut
- I2BC, Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, Université Paris-Saclay , 91198 , Gif-sur-Yvette cedex , France
- Ipsen , 28100 Dreux , France
| | - Damien Rault
- IPR, Université Rennes 1 , 35000 Rennes , France
- Ipsen , 28100 Dreux , France
| | | | - Thomas Bizien
- Synchrotron Soleil, L'Orme des Merisiers , 91190 Saint-Aubin , France
| | - Keinny François
- I2BC, Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, Université Paris-Saclay , 91198 , Gif-sur-Yvette cedex , France
| | | | | | | | | | - Maïté Paternostre
- I2BC, Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, Université Paris-Saclay , 91198 , Gif-sur-Yvette cedex , France
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24
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Ducarme G, Pizzoferrato AC, de Tayrac R, Schantz C, Thubert T, Le Ray C, Riethmuller D, Verspyck E, Gachon B, Pierre F, Artzner F, Jacquetin B, Fritel X. [Perineal prevention and protection in obstetrics: CNGOF Clinical Practice Guidelines (short version)]. ACTA ACUST UNITED AC 2018; 46:893-899. [PMID: 30391283 DOI: 10.1016/j.gofs.2018.10.032] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Indexed: 11/30/2022]
Abstract
INTRODUCTION The objective of these clinical practice guidelines was to analyse all of the interventions during pregnancy and childbirth that might prevent obstetric anal sphincter injuries (OASIS) and postnatal pelvic floor symptoms. MATERIAL AND METHODS These guidelines were developed in accordance with the methods prescribed by the French Health Authority (HAS). RESULTS A prenatal clinical examination of the perineum is recommended for women with a history of Crohn's disease, OASIS, genital mutilation, or perianal lesions (professional consensus). Just after delivery, a perineal examination is recommended to check for OASIS (Grade B); if there is doubt about the diagnosis, a second opinion should be requested (GradeC). In case of OASIS, the injuries (including their severity) and the technique for their repair should be described in detail (GradeC). Perineal massage during pregnancy must be encouraged among women who want it (Grade B). No intervention conducted before the start of the active phase of the second stage of labour has been shown to be effective in reducing the risk of perineal injury. The crowning of the baby's head should be manually controlled and the posterior perineum manually supported to reduce the risk of OASIS (GradeC). The performance of an episiotomy during normal deliveries is not recommended to reduce the risk of OASIS (Grade A). In instrumental deliveries, episiotomy may be indicated to avoid OASIS (GradeC). When an episiotomy is performed, a mediolateral incision is recommended (Grade B). The indication for episiotomy should be explained to the woman, and she should consent before its performance. Advising women to have a caesarean delivery for primary prevention of postnatal urinary or anal incontinence is not recommended (Grade B). During pregnancy and again in the labour room, obstetrics professionals should focus on the woman's expectations and inform her about the modes of delivery.
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Affiliation(s)
- G Ducarme
- Service de gynécologie-obstétrique, centre hospitalier départemental Vendée, boulevard Stéphane-Moreau, 85000 La Roche-sur-Yon, France.
| | - A C Pizzoferrato
- Service de gynécologie-obstétrique, CHU Caen, avenue de la Côte-de-Nacre, 14033 Caen cedex, France
| | - R de Tayrac
- Service de gynécologie-obstétrique, CHU Carémeau, place du Pr-Debré, 30900 Nîmes, France
| | - C Schantz
- Centre population et développement (Ceped), institut de la recherche et du développement (IRD), université Paris Descartes, Inserm, Commission scientifique du Collège national des sages-femmes (CNSF), 75000 Paris, France
| | - T Thubert
- Service de gynécologie-obstétrique, CHU Hôtel-Dieu, hôpitaux de Nantes, université de Nantes, 38, boulevard Jean-Monnet, 44000 Nantes, France; GMC-UPMC 01, GREEN (Groupe de recherche clinique en neurourologie), 4, rue de la Chine, 75020 Paris, France
| | - C Le Ray
- Maternité Port-Royal, hôpital Cochin, Assistance publique-Hôpitaux de Paris, 123, boulevard de Port-Royal, 75014 Paris, France; Inserm U1153, épidémiologie obstétricale, périnatale et pédiatrique (équipe EPOPé), centre de recherche en épidémiologie et statistiques Sorbonne Paris cité (CRESS), DHU risques et grossesse, université Paris Descartes, 75014 Paris, France
| | - D Riethmuller
- Pôle Mère-Femme, CHRU Besançon, 3, boulevard Fleming, 25000 Besançon, France
| | - E Verspyck
- Service de gynécologie-obstétrique, CHU Charles-Nicolle, 1, rue de Germont, 76000 Rouen, France
| | - B Gachon
- Service de gynécologie-obstétrique et médecine de la reproduction, CHU de Poitiers, université de Poitiers, 2, rue de la Milétrie, 86021 Poitiers, France
| | - F Pierre
- Service de gynécologie-obstétrique et médecine de la reproduction, CHU de Poitiers, université de Poitiers, 2, rue de la Milétrie, 86021 Poitiers, France
| | - F Artzner
- Collectif inter-associatif autour de la naissance (CIANE), 40, rue de Chanzy, 75011 Paris, France
| | - B Jacquetin
- Pôle Femme-Enfant, CHU Estaing, 1, place Lucie-Aubrac, 63003 Clermont-Ferrand, France
| | - X Fritel
- Service de gynécologie-obstétrique et médecine de la reproduction, CHU de Poitiers, université de Poitiers, 2, rue de la Milétrie, 86021 Poitiers, France
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25
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Panizza P, Algaba H, Postic M, Raffy G, Courbin L, Artzner F. Order-Disorder Structural Transitions in Mazes Built by Evaporating Drops. Phys Rev Lett 2018; 121:078002. [PMID: 30169059 DOI: 10.1103/physrevlett.121.078002] [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] [Received: 11/27/2017] [Indexed: 06/08/2023]
Abstract
We show that the evaporation of surfactant solutions confined in quasi-two-dimensional porous media creates micron-sized labyrinthine patterns composing the walls of a centimeter-sized maze. These walls are made of solid deposits formed during drying via a sequence of individual Haines jumps occurring at the pore scale. We rationalize this process driven by simple iterative rules with a cellular automaton that acts as a maze generator. This model well describes the formation dynamics and final structure of an experimental maze as functions of the wettability heterogeneities of a porous medium and its geometry. Also, our findings unveil the crucial role of two geometric dimensionless quantities that control the structural order of a maze.
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Affiliation(s)
- P Panizza
- Univ Rennes, CNRS, IPR (Institut de Physique de Rennes)-UMR 6251, F-35000 Rennes, France
| | - H Algaba
- Univ Rennes, CNRS, IPR (Institut de Physique de Rennes)-UMR 6251, F-35000 Rennes, France
| | - M Postic
- Univ Rennes, CNRS, IPR (Institut de Physique de Rennes)-UMR 6251, F-35000 Rennes, France
| | - G Raffy
- Univ Rennes, CNRS, IPR (Institut de Physique de Rennes)-UMR 6251, F-35000 Rennes, France
| | - L Courbin
- Univ Rennes, CNRS, IPR (Institut de Physique de Rennes)-UMR 6251, F-35000 Rennes, France
| | - F Artzner
- Univ Rennes, CNRS, IPR (Institut de Physique de Rennes)-UMR 6251, F-35000 Rennes, France
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26
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Et-Thakafy O, Delorme N, Gaillard C, Mériadec C, Artzner F, Lopez C, Guyomarc'h F. Mechanical Properties of Membranes Composed of Gel-Phase or Fluid-Phase Phospholipids Probed on Liposomes by Atomic Force Spectroscopy. Langmuir 2017; 33:5117-5126. [PMID: 28475345 DOI: 10.1021/acs.langmuir.7b00363] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
In many liposome applications, the nanomechanical properties of the membrane envelope are essential to ensure, e.g., physical stability, protection, or penetration into tissues. Of all factors, the lipid composition and its phase behavior are susceptible to tune the mechanical properties of membranes. To investigate this, small unilamellar vesicles (SUV; diameter < 200 nm), referred to as liposomes, were produced using either unsaturated 1,2-dioleoyl-sn-glycero-3-phosphocholine (DOPC) or saturated 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC) in aqueous buffer at pH 6.7. The respective melting temperatures of these phospholipids were -20 and 41 °C. X-ray diffraction analysis confirmed that at 20 °C DOPC was in the fluid phase and DPPC was in the gel phase. After adsorption of the liposomes onto flat silicon substrates, atomic force microscopy (AFM) was used to image and probe the mechanical properties of the liposome membrane. The resulting force-distance curves were treated using an analytical model based on the shell theory to yield the Young's modulus (E) and the bending rigidity (kC) of the curved membranes. The mechanical investigation showed that DPPC membranes were much stiffer (E = 116 ± 45 MPa) than those of DOPC (E = 13 ± 9 MPa) at 20 °C. The study demonstrates that the employed methodology allows discrimination of the respective properties of gel- or fluid-phase membranes when in the shape of liposomes. It opens perspectives to map the mechanical properties of liposomes containing both fluid and gel phases or of biological systems.
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Affiliation(s)
| | - Nicolas Delorme
- UMR CNRS 6283 Institut des Molécules et Matériaux du Mans, Université du Maine, Université Bretagne-Loire, 72000 Le Mans, France
| | - Cédric Gaillard
- UR BIA 1268 Biopolymères Interactions Assemblages, INRA, 44316 Nantes, France
| | - Cristelle Mériadec
- Institut de Physique de Rennes, UMR 6251, CNRS, Université de Rennes 1, 263 Av. Général Leclerc, 35042 Rennes, France
| | - Franck Artzner
- Institut de Physique de Rennes, UMR 6251, CNRS, Université de Rennes 1, 263 Av. Général Leclerc, 35042 Rennes, France
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27
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Cabane B, Li J, Artzner F, Botet R, Labbez C, Bareigts G, Sztucki M, Goehring L. Hiding in Plain View: Colloidal Self-Assembly from Polydisperse Populations. Phys Rev Lett 2016; 116:208001. [PMID: 27258885 DOI: 10.1103/physrevlett.116.208001] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2015] [Indexed: 05/22/2023]
Abstract
We report small-angle x-ray scattering experiments on aqueous dispersions of colloidal silica with a broad monomodal size distribution (polydispersity, 14%; size, 8 nm). Over a range of volume fractions, the silica particles segregate to build first one, then two distinct sets of colloidal crystals. These dispersions thus demonstrate fractional crystallization and multiple-phase (bcc, Laves AB_{2}, liquid) coexistence. Their remarkable ability to build complex crystal structures from a polydisperse population originates from the intermediate-range nature of interparticle forces, and it suggests routes for designing self-assembling colloidal crystals from the bottom up.
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Affiliation(s)
- Bernard Cabane
- LCMD, CNRS UMR 8231, ESPCI, 10 rue Vauquelin, 75231 Paris Cedex 05, France
| | - Joaquim Li
- Max Planck Institute for Dynamics and Self-Organization (MPIDS), 37077 Göttingen, Germany
| | - Franck Artzner
- Institut de Physique de Rennes, CNRS UMR 6251, Université Rennes 1, 35042 Rennes Cedex, France
| | - Robert Botet
- Physique des Solides, CNRS UMR 8502, Université Paris-Sud, F-91405 Orsay, France
| | - Christophe Labbez
- ICB, CNRS UMR 6303, Université de Bourgogne Franche-Comté, F-21078 Dijon, France
| | - Guillaume Bareigts
- ICB, CNRS UMR 6303, Université de Bourgogne Franche-Comté, F-21078 Dijon, France
| | - Michael Sztucki
- ESRF-The European Synchrotron, CS40220, 38043 Grenoble Cedex 9, France
| | - Lucas Goehring
- Max Planck Institute for Dynamics and Self-Organization (MPIDS), 37077 Göttingen, Germany
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28
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Ghoufi A, Artzner F, Malfreyt P. Physical Properties and Hydrogen-Bonding Network of Water-Ethanol Mixtures from Molecular Dynamics Simulations. J Phys Chem B 2016; 120:793-802. [PMID: 26743948 DOI: 10.1021/acs.jpcb.5b11776] [Citation(s) in RCA: 72] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
While many numerical and experimental works were focused on water-ethanol mixtures at low ethanol concentration, this work reports predictions of a few physical properties (thermodynamical, interfacial, dynamical, and dielectrical properties) of water-ethanol mixture at high alcohol concentrations by means of molecular dynamics simulations. By using a standard force field a good agreement was found between experiment and molecular simulation. This was allowed us to explore the dynamics, structure, and interplay between both hydrogen-bonding networks of water and ethanol.
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Affiliation(s)
- A Ghoufi
- Institut de Physique de Rennes, UMR 6251 CNRS, Université de Rennes 1 , 263 avenue Général Leclerc, 35042 Rennes, France
| | - F Artzner
- Institut de Physique de Rennes, UMR 6251 CNRS, Université de Rennes 1 , 263 avenue Général Leclerc, 35042 Rennes, France
| | - P Malfreyt
- Institut de Chimie de Clermont-Ferrand, ICCF, UMR CNRS 6296 , BP 10448, F-63000 Clermont-Ferrand, France
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29
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Abstract
A modified version of the Gibbs-ensemble Monte-Carlo method reveals how polydisperse charged colloidal particles can build complex colloidal crystals. It provides general rules that are applicable to this fractionated crystallization that stems from size segregation. It explains the spontaneous formation of complex crystals with very large unit-cells in suspensions of nanoparticles with a broad size distribution.
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Affiliation(s)
- Robert Botet
- Laboratoire de Physique des Solides
- CNRS UMR8502
- Univ. Paris-Sud
- Université Paris-Saclay
- 91405 Orsay Cedex
| | | | - Lucas Goehring
- Max Planck Institute for Dynamics and Self-Organization (MPIDS)
- 37077 Göttingen
- Germany
| | - Joaquim Li
- Max Planck Institute for Dynamics and Self-Organization (MPIDS)
- 37077 Göttingen
- Germany
| | - Franck Artzner
- Institut de Physique
- CNRS UMR 6626
- Univ. Rennes
- 35042 Rennes
- France
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30
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Abstract
Self-organization of fluorescent nanoparticles, using biological molecules such as phospholipids to control assembly distances, is a promising method for creating hybrid nanostructures. We report here the formation of hybrid condensed phases made of anisotropic nanoparticles and phospholipids. Such structure formation is driven by electrostatic interaction between the nanoparticles and the phospholipids, and results in the formation of a 2D rectangular liquid crystal, as confirmed by high-resolution Small-Angle X-ray Scattering (SAXS). Moreover, we show that the fluorescent properties of the NPs are not modified by the self-assembly process.
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Affiliation(s)
- Thomas Bizien
- Université de Rennes 1, CNRS UMR 6226, Institut des Sciences Chimiques de Rennes, Avenue du Général Leclerc, 35042 Rennes, France
- Université de Rennes 1, CNRS UMR 6251, Institut de Physique de Rennes, Avenue du Général Leclerc, 35042 Rennes, France
- Synchrotron SOLEIL l'Orme des Merisiers Saint-Aubin - BP 48 91192 Gif-sur-Yvette Cedex, France
| | - Jean-Claude Ameline
- Université de Rennes 1, CNRS UMR 6251, Institut de Physique de Rennes, Avenue du Général Leclerc, 35042 Rennes, France
| | - Kevin G Yager
- Center for Functional Nanomaterials, Brookhaven National Laboratory , Upton, New York 11973, United States
| | - Valérie Marchi
- Université de Rennes 1, CNRS UMR 6226, Institut des Sciences Chimiques de Rennes, Avenue du Général Leclerc, 35042 Rennes, France
| | - Franck Artzner
- Université de Rennes 1, CNRS UMR 6251, Institut de Physique de Rennes, Avenue du Général Leclerc, 35042 Rennes, France
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31
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Valéry C, Deville-Foillard S, Lefebvre C, Taberner N, Legrand P, Meneau F, Meriadec C, Delvaux C, Bizien T, Kasotakis E, Lopez-Iglesias C, Gall A, Bressanelli S, Le Du MH, Paternostre M, Artzner F. Atomic view of the histidine environment stabilizing higher-pH conformations of pH-dependent proteins. Nat Commun 2015; 6:7771. [PMID: 26190377 PMCID: PMC4518280 DOI: 10.1038/ncomms8771] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2015] [Accepted: 06/09/2015] [Indexed: 11/17/2022] Open
Abstract
External stimuli are powerful tools that naturally control protein assemblies and functions. For example, during viral entry and exit changes in pH are known to trigger large protein conformational changes. However, the molecular features stabilizing the higher pH structures remain unclear. Here we elucidate the conformational change of a self-assembling peptide that forms either small or large nanotubes dependent on the pH. The sub-angstrom high-pH peptide structure reveals a globular conformation stabilized through a strong histidine-serine H-bond and a tight histidine-aromatic packing. Lowering the pH induces histidine protonation, disrupts these interactions and triggers a large change to an extended β-sheet-based conformation. Re-visiting available structures of proteins with pH-dependent conformations reveals both histidine-containing aromatic pockets and histidine-serine proximity as key motifs in higher pH structures. The mechanism discovered in this study may thus be generally used by pH-dependent proteins and opens new prospects in the field of nanomaterials. In biological systems, large pH-induced conformational changes can be observed in certain proteins, a phenomenon poorly understood at the molecular level. Here the authors describe a peptide with the ability to self-organize into either small or large nanotubes in a pH-dependent manner and detail the mechanism driving the transition.
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Affiliation(s)
- Céline Valéry
- 1] Biomolecular Interaction Centre, School of Biological Sciences, University of Canterbury, 8140 Christchurch, New zealand [2] Ipsen, 5 Avenue du Canada, 91940 Les Ulis, France
| | - Stéphanie Deville-Foillard
- 1] Ipsen, 5 Avenue du Canada, 91940 Les Ulis, France [2] CEA, Institute of Biology and Technologies of Saclay, 91191 CEA-Saclay, France [3] Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, 91191 CEA-Saclay, Gif sur Yvette, France
| | - Christelle Lefebvre
- CNRS, UMR 6251, Institut de Physique de Rennes, 263 av. Général Leclerc, Université Rennes I, 35042 Rennes Cedex, France
| | | | | | | | - Cristelle Meriadec
- CNRS, UMR 6251, Institut de Physique de Rennes, 263 av. Général Leclerc, Université Rennes I, 35042 Rennes Cedex, France
| | - Camille Delvaux
- 1] CEA, Institute of Biology and Technologies of Saclay, 91191 CEA-Saclay, France [2] Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, 91191 CEA-Saclay, Gif sur Yvette, France
| | - Thomas Bizien
- CNRS, UMR 6251, Institut de Physique de Rennes, 263 av. Général Leclerc, Université Rennes I, 35042 Rennes Cedex, France
| | - Emmanouil Kasotakis
- 1] CEA, Institute of Biology and Technologies of Saclay, 91191 CEA-Saclay, France [2] Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, 91191 CEA-Saclay, Gif sur Yvette, France
| | - Carmen Lopez-Iglesias
- Cryo-Electron Microscopy Unit. Scientific and Tecnological Centers of the University of Barcelona, E-08028 Barcelona, Spain
| | - Andrew Gall
- 1] CEA, Institute of Biology and Technologies of Saclay, 91191 CEA-Saclay, France [2] Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, 91191 CEA-Saclay, Gif sur Yvette, France
| | - Stéphane Bressanelli
- 1] CEA, Institute of Biology and Technologies of Saclay, 91191 CEA-Saclay, France [2] Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, 91191 CEA-Saclay, Gif sur Yvette, France
| | - Marie-Hélène Le Du
- 1] CEA, Institute of Biology and Technologies of Saclay, 91191 CEA-Saclay, France [2] Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, 91191 CEA-Saclay, Gif sur Yvette, France
| | - Maïté Paternostre
- 1] CEA, Institute of Biology and Technologies of Saclay, 91191 CEA-Saclay, France [2] Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, 91191 CEA-Saclay, Gif sur Yvette, France
| | - Franck Artzner
- CNRS, UMR 6251, Institut de Physique de Rennes, 263 av. Général Leclerc, Université Rennes I, 35042 Rennes Cedex, France
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32
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Bizien T, Even-Hernandez P, Postic M, Mazari E, Chevance S, Bondon A, Hamon C, Troadec D, Largeau L, Dupuis C, Gosse C, Artzner F, Marchi V. Peptidic ligands to control the three-dimensional self-assembly of quantum rods in aqueous media. Small 2014; 10:3707-3716. [PMID: 24864008 DOI: 10.1002/smll.201400300] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2014] [Revised: 04/28/2014] [Indexed: 06/03/2023]
Abstract
The use of peptidic ligands is validated as a generic chemical platform allowing one to finely control the organization in solid phase of semiconductor nanorods originally dispersed in an aqueous media. An original method to generate, on a macroscopic scale and with the desired geometry, three-dimensional supracrystals composed of quantum rods is introduced. In a first step, nanorods are transferred in an aqueous phase thanks to the substitution of the original capping layer by peptidic ligands. Infrared and nuclear magnetic resonance spectroscopy data prove that the exchange is complete; fluorescence spectroscopy demonstrates that the emitter optical properties are not significantly altered; electrophoresis and dynamic light scattering experiments assess the good colloidal stability of the resulting aqueous suspension. In a second step, water evaporation in a microstructured environment yields superstructures with a chosen geometry and in which nanorods obey a smectic B arrangement, as shown by electron microscopy. Incidentally, bulk drying in a capillary tube generates a similar local order, as evidenced by small angle X-ray scattering.
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Affiliation(s)
- Thomas Bizien
- Université de Rennes 1, CNRS UMR 6226, Institut des Sciences Chimiques de Rennes, Avenue du Général Leclerc, 35042, Rennes, France; Université de Rennes 1, CNRS UMR 6251, Institut de Physique de Rennes, Avenue du Général Leclerc, 35042, Rennes, France
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33
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Le Gall T, Barbeau J, Barrier S, Berchel M, Lemiègre L, Jeftić J, Meriadec C, Artzner F, Gill DR, Hyde SC, Férec C, Lehn P, Jaffrès PA, Benvegnu T, Montier T. Effects of a Novel Archaeal Tetraether-Based Colipid on the In Vivo Gene Transfer Activity of Two Cationic Amphiphiles. Mol Pharm 2014; 11:2973-88. [DOI: 10.1021/mp4006276] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Tony Le Gall
- Unité
INSERM 1078, SFR ScInBioS; Université de Bretagne Occidentale, Université Européenne de Bretagne, 46 rue Félix Le Dantec, CS51819, 29218 Brest Cedex 02, France
- Plateforme
SynNanoVect, SFR ScInBioS; Université de Bretagne Occidentale, Université Européenne de Bretagne, Brest, France
| | - Julie Barbeau
- Ecole
Nationale Supérieure de Chimie de Rennes, Université Européenne de Bretagne, CNRS,
UMR 6226, 11 allée de Beaulieu,
CS 50837, 35708 Rennes Cedex 7, France
| | - Sylvain Barrier
- Ecole
Nationale Supérieure de Chimie de Rennes, Université Européenne de Bretagne, CNRS,
UMR 6226, 11 allée de Beaulieu,
CS 50837, 35708 Rennes Cedex 7, France
| | - Mathieu Berchel
- CEMCA,
CNRS UMR 6521, SFR ScInBioS, Université Européenne de Bretagne, Université de Brest, Brest, France
| | - Loïc Lemiègre
- Plateforme
SynNanoVect, SFR ScInBioS; Université de Bretagne Occidentale, Université Européenne de Bretagne, Brest, France
- Ecole
Nationale Supérieure de Chimie de Rennes, Université Européenne de Bretagne, CNRS,
UMR 6226, 11 allée de Beaulieu,
CS 50837, 35708 Rennes Cedex 7, France
| | - Jelena Jeftić
- Plateforme
SynNanoVect, SFR ScInBioS; Université de Bretagne Occidentale, Université Européenne de Bretagne, Brest, France
- Ecole
Nationale Supérieure de Chimie de Rennes, Université Européenne de Bretagne, CNRS,
UMR 6226, 11 allée de Beaulieu,
CS 50837, 35708 Rennes Cedex 7, France
| | - Cristelle Meriadec
- Institut
de Physique de Rennes, Université Européenne de Bretagne, Université de Rennes 1, UMR-CNRS 6251, Campus Beaulieu Bat.
11A, 35042 Rennes
Cedex, France
| | - Franck Artzner
- Institut
de Physique de Rennes, Université Européenne de Bretagne, Université de Rennes 1, UMR-CNRS 6251, Campus Beaulieu Bat.
11A, 35042 Rennes
Cedex, France
| | - Deborah R. Gill
- Gene Medicine
Group, Nuffield Division of Clinical Laboratory Sciences, University of Oxford,
John Radcliffe Hospital, Oxford, United Kingdom
| | - Stephen C. Hyde
- Gene Medicine
Group, Nuffield Division of Clinical Laboratory Sciences, University of Oxford,
John Radcliffe Hospital, Oxford, United Kingdom
| | - Claude Férec
- Unité
INSERM 1078, SFR ScInBioS; Université de Bretagne Occidentale, Université Européenne de Bretagne, 46 rue Félix Le Dantec, CS51819, 29218 Brest Cedex 02, France
| | - Pierre Lehn
- Unité
INSERM 1078, SFR ScInBioS; Université de Bretagne Occidentale, Université Européenne de Bretagne, 46 rue Félix Le Dantec, CS51819, 29218 Brest Cedex 02, France
| | - Paul-Alain Jaffrès
- Plateforme
SynNanoVect, SFR ScInBioS; Université de Bretagne Occidentale, Université Européenne de Bretagne, Brest, France
- CEMCA,
CNRS UMR 6521, SFR ScInBioS, Université Européenne de Bretagne, Université de Brest, Brest, France
| | - Thierry Benvegnu
- Plateforme
SynNanoVect, SFR ScInBioS; Université de Bretagne Occidentale, Université Européenne de Bretagne, Brest, France
- Ecole
Nationale Supérieure de Chimie de Rennes, Université Européenne de Bretagne, CNRS,
UMR 6226, 11 allée de Beaulieu,
CS 50837, 35708 Rennes Cedex 7, France
| | - Tristan Montier
- Unité
INSERM 1078, SFR ScInBioS; Université de Bretagne Occidentale, Université Européenne de Bretagne, 46 rue Félix Le Dantec, CS51819, 29218 Brest Cedex 02, France
- Plateforme
SynNanoVect, SFR ScInBioS; Université de Bretagne Occidentale, Université Européenne de Bretagne, Brest, France
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34
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Gobeaux F, Tarabout C, Fay N, Meriadec C, Ligeti M, Buisson DA, Cintrat JC, Artzner F, Paternostre M. Directing peptide crystallization through curvature control of nanotubes. J Pept Sci 2014; 20:508-16. [PMID: 24916887 DOI: 10.1002/psc.2647] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2014] [Revised: 04/16/2014] [Accepted: 04/16/2014] [Indexed: 11/06/2022]
Abstract
In the absence of efficient crystallization methods, the molecular structures of fibrous assemblies have so far remained rather elusive. In this paper, we present a rational method to crystallize the lanreotide octapeptide by modification of a residue involved in a close contact. Indeed, we show that it is possible to modify the curvature of the lanreotide nanotubes and hence their diameter. This fine tuning leads to crystallization because the radius of curvature of the initially bidimensional peptide wall can be increased up to a point where the wall is essentially flat and a crystal is allowed to grow along a third dimension. By comparing X-ray diffraction data and Fourier transform Raman spectra, we show that the nanotubes and the crystals share similar cell parameters and molecular conformations, proving that there is indeed a structural continuum between these two morphologies. These results illustrate a novel approach to crystallization and represent the first step towards the acquisition of an Å-resolution structure of the lanreotide nanotubes β-sheet assembly.
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Affiliation(s)
- Frédéric Gobeaux
- iBiTec-S, SB2SM, UMR 8221, CEA/CNRS, CEA-Saclay, 91191, Gif-sur-Yvette, France; Institut de Physique de Rennes, UMR 6251 CNRS/Université Rennes 1, Campus Beaulieu, 35042, Rennes Cedex, France; Laboratoire Interdisciplinaire sur l'Organisation Nanométrique et Supramoléculaire (LIONS), IRAMIS, NIMBE, UMR 3299 CEA/CNRS CEA-Saclay, 91191, Gif-sur-Yvette Cedex, France
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35
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Cortes MA, Dorson F, Prévôt M, Ghoufi A, Fontaine B, Goujon F, Gautier R, Cîrcu V, Mériadec C, Artzner F, Folliot H, Cordier S, Molard Y. Thermotropic Luminescent Clustomesogen Showing a Nematic Phase: A Combination of Experimental and Molecular Simulation Studies. Chemistry 2014; 20:8561-5. [DOI: 10.1002/chem.201402466] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2014] [Indexed: 11/12/2022]
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36
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Hamon C, Bizien T, Artzner F, Even-Hernandez P, Marchi V. Replacement of CTAB with peptidic ligands at the surface of gold nanorods and their self-assembling properties. J Colloid Interface Sci 2014; 424:90-7. [PMID: 24767503 DOI: 10.1016/j.jcis.2014.03.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2014] [Revised: 02/28/2014] [Accepted: 03/01/2014] [Indexed: 10/25/2022]
Abstract
Herein, we describe the self-assembling of gold nanorods (GNRs) induced during the ligand exchange at their surface. An exchange reaction between tricysteine PEGylated peptidic ligands and cetyltrimethylammonium bromide (CTAB)-protected gold nanorods is conducted. We demonstrated that the terminal group charge (positively or negatively charged) and the hydrophobicity of the peptidic ligands (bearing or not an undecanoyl chain) strongly affects the self-organization of the GNRs occurring in solution. Adjusting the amount of short PEGylated peptides causes a self-organization of the gold nanorods in solution, resulting in a red- or blue-shift of the plasmon bands. The decrease of their surface charge and the self-assembling in solution were first shown by zetametry, by Dynamic Light Scattering and UV-spectroscopy. Thanks to Small Angle X-ray Scattering experiments and Transmission Electron Microscopy images, the self-organization of the nanorods in solution was clearly demonstrated and correlated to the spectroscopic change in absorbance. Conversely, in the case of longer PEGylated peptidic ligands including an undecanoyl chain, the GNRs are particularly stable against aggregation for several days after purification. By controlled drying on a substrate, we showed their ability to self-organize into well-defined ordered structures making them very attractive as building blocks to design optical materials.
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Affiliation(s)
- C Hamon
- Institut des Sciences Chimiques de Rennes, University Rennes 1, UMR 6226 C.N.R.S., Campus de Beaulieu, 35042 Rennes Cedex, France
| | - T Bizien
- Institut des Sciences Chimiques de Rennes, University Rennes 1, UMR 6226 C.N.R.S., Campus de Beaulieu, 35042 Rennes Cedex, France; Institut de Physique de Rennes, University Rennes 1, UMR 6251 C.N.R.S., Campus de Beaulieu, 35042 Rennes Cedex, France
| | - F Artzner
- Institut de Physique de Rennes, University Rennes 1, UMR 6251 C.N.R.S., Campus de Beaulieu, 35042 Rennes Cedex, France
| | - P Even-Hernandez
- Institut des Sciences Chimiques de Rennes, University Rennes 1, UMR 6226 C.N.R.S., Campus de Beaulieu, 35042 Rennes Cedex, France
| | - V Marchi
- Institut des Sciences Chimiques de Rennes, University Rennes 1, UMR 6226 C.N.R.S., Campus de Beaulieu, 35042 Rennes Cedex, France.
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37
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Wien F, Paternostre M, Gobeaux F, Artzner F, Refregiers M. Calibration and quality assurance procedures at the far UV linear and circular dichroism experimental station DISCO. ACTA ACUST UNITED AC 2013. [DOI: 10.1088/1742-6596/425/12/122014] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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38
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Gobeaux F, Fay N, Tarabout C, Meneau F, Mériadec C, Delvaux C, Cintrat JC, Valéry C, Artzner F, Paternostre M. Experimental observation of double-walled peptide nanotubes and monodispersity modeling of the number of walls. Langmuir 2013; 29:2739-2745. [PMID: 23368945 DOI: 10.1021/la304862f] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Self-assembled nanoarchitectures based on biological molecules are attractive because of the simplicity and versatility of the building blocks. However, size control is still a challenge. This control is only possible when a given system is deeply understood. Such is the case with the lanreotide acetate, an octapeptide salt that spontaneously forms monodisperse nanotubes when dissolved into pure water. Following a structural approach, we have in the past demonstrated the possibility to tune the diameter of these nanotubes while keeping a strict monodispersity, either by chemical modification of one precise amino acid on the peptide sequence or by changing the size of the counterions. On the basis of these previous studies, we replaced monovalent counterions by divalent ones to vary the number of walls. Indeed, in the present work, we show that lanreotide associated with a divalent counterion forms double-walled nanotubes while keeping the average diameter constant. However, the strict monodispersity of the number of walls was unexpected. We propose that the divalent counterions create an adhesion force that can drive the wall packing. This adhesion force is counterbalanced by a mechanical one that is related to the stiffness of the peptide wall. By taking into account these two opposite forces, we have built a general model that fully explains why the lanreotide nanotubes formed with divalent counterions possess two walls and not more.
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Affiliation(s)
- Frédéric Gobeaux
- Institut de Biologie et de Technologies de Saclay/Service de Bioénergétique, Biologie Structurale et Mécanismes, UMR 8221 CNRS and CEA, CEA-Saclay, 91191 Gif-sur-Yvette, France
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39
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Caillé A, Artzner F, Amblard F. Ordered stacking of F-actin layers and mixed lipid bilayers: a columnar liquid crystal. Phys Rev Lett 2013; 110:048102. [PMID: 25166203 DOI: 10.1103/physrevlett.110.048102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2012] [Indexed: 06/03/2023]
Abstract
In this Letter, we show how the grooved helical structure of actin microfilaments (F-actin) interacting with mixed fluid lipid bilayers leads to handedness-independent 1D lipid bilayer undulations coupled to longitudinal in-plane ordering of the microfilaments. This longitudinal ordering is forced by the emerging in-plane compression and curvature energy terms of the straight 1D bilayer undulation wave fronts. Thereby, adjacent helices are set into registry along their long axis in their monolayer and π shifted between adjacent monolayers. An ordered composite multilamellar structure emerges by alternate stacking of these lipid bilayers and monolayers of F-actin. This two-dimensionally ordered system has the symmetries of a centered rectangular columnar liquid crystal, the straight 1D wave fronts playing the role of the classical molecular columns.
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Affiliation(s)
- A Caillé
- Département de Physique, Université de Montréal, Montréal, Canada H3C3J7
| | - F Artzner
- Institut Physique de Rennes, UMR 6251 CNRS, Université de Rennes 1, 35042 Rennes Cedex, France
| | - F Amblard
- Laboratoire de Physico-chimie, UMR 168 CNRS, Institut Curie, 75248 Paris Cedex 04, France
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40
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41
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Emile J, Werts MHV, Artzner F, Casanova F, Emile O, Navarro JRG, Meneau F. Foam films in the presence of functionalized gold nanoparticles. J Colloid Interface Sci 2012; 383:124-9. [PMID: 22809546 DOI: 10.1016/j.jcis.2012.06.039] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2012] [Revised: 06/14/2012] [Accepted: 06/16/2012] [Indexed: 10/28/2022]
Abstract
Dry aqueous foams made of anionic surfactant (SDS) and spherical gold nanoparticles are studied by small angle X-ray scattering and by optical techniques. To obtain stable foams, the surfactant concentration is well above the critical micelle concentration. The specular reflectivity signal obtained on a very thin film (thickness 20 nm) shows that functionalized nanoparticles (17 nm typical size) are trapped within the film in the form of a single monolayer. In order to isolate the film behavior, investigations are made on a single film confined in a tube. The film thinning according to the ratio of functionalized nanoparticle and SDS micelles (1:1, 1:10, 1:100) is mainly governed by the structural arrangement of SDS micelles. In thick films, nanoparticles tend to form aggregates that disappear during drainage. In particular self-organization of nanoparticles (with different surface charge) inside the film is not detected.
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Affiliation(s)
- Janine Emile
- Institut de Physique de Rennes, CNRS UMR 6521, Université de Rennes I, Campus de Beaulieu, 35042 Rennes, France.
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Hamon C, Postic M, Mazari E, Bizien T, Dupuis C, Even-Hernandez P, Jimenez A, Courbin L, Gosse C, Artzner F, Marchi-Artzner V. Three-dimensional self-assembling of gold nanorods with controlled macroscopic shape and local smectic B order. ACS Nano 2012; 6:4137-4146. [PMID: 22497873 DOI: 10.1021/nn3006027] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We describe a method of controlled evaporation on a textured substrate for self-assembling and shaping gold-nanorod-based materials. Tridimensional wall features are formed over areas as large as several square millimeters. Furthermore, analyses by small-angle X-ray scattering and scanning electron microscopy techniques demonstrate that colloids are locally ordered as a smectic B phase. Such crystallization is in fact possible because we could finely adjust the nanoparticle charge, knowledge that additionally enables tuning the lattice parameters. In the future, the type of ordered self-assemblies of gold nanorods we have prepared could be used for amplifying optical signals.
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Affiliation(s)
- Cyrille Hamon
- Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS, Université Rennes 1, Avenue du Général Leclerc, 35042 Rennes Cedex, France
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43
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Jacquemet A, Mériadec C, Lemiègre L, Artzner F, Benvegnu T. Stereochemical effect revealed in self-assemblies based on archaeal lipid analogues bearing a central five-membered carbocycle: a SAXS study. Langmuir 2012; 28:7591-7597. [PMID: 22546181 DOI: 10.1021/la2045948] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [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
The relative stereochemistry (cis or trans) of a 1,3-disubstituted cyclopentane unit in the middle of tetraether archaeal bipolar lipid analogues was found to have a dramatic influence on their supramolecular self-assembly properties. SAXS studies of two synthetic diastereomeric archaeal lipids bearing two lactosyl polar head groups at opposite ends revealed different lyotropic behaviors. The cis isomer led to L(c)-L(α)-Q(II) transitions whereas the trans isomer retained an L(α) phase from 20 to 100 °C. These main differences originate from the conformational equilibrium (pseudorotation) of 1,3-disubstituted cyclopentanes. Indeed, this pseudorotation exhibits quite similar orientations of the two substituents in a trans isomer whereas several orientations of the two alkyl chains are expected in a cis-1,3-dialkyl cyclopentane, thus authorizing more conformational flexibility in the lipid packing.
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Affiliation(s)
- Alicia Jacquemet
- Ecole Nationale Supérieure de Chimie de Rennes, CNRS, UMR 6226, Avenue du Général Leclerc, CS 50837, 35708 Rennes Cedex 7, France
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44
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Debnath S, Bergamini JF, Artzner F, Mériadec C, Camerel F, Fourmigué M. Near-infrared chiro-optical effects in metallogels. Chem Commun (Camb) 2012; 48:2283-5. [DOI: 10.1039/c2cc16549j] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Gobeaux F, Fay N, Tarabout C, Mériadec C, Meneau F, Ligeti M, Buisson DA, Cintrat JC, Nguyen KMH, Perrin L, Valéry C, Artzner F, Paternostre M. Structural role of counterions adsorbed on self-assembled peptide nanotubes. J Am Chem Soc 2011; 134:723-33. [PMID: 22136398 DOI: 10.1021/ja210299g] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Among noncovalent forces, electrostatic ones are the strongest and possess a rather long-range action. For these reasons, charges and counterions play a prominent role in self-assembly processes in water and therefore in many biological systems. However, the complexity of the biological media often hinders a detailed understanding of all the electrostatic-related events. In this context, we have studied the role of charges and counterions in the self-assembly of lanreotide, a cationic octapeptide. This peptide spontaneously forms monodisperse nanotubes (NTs) above a critical concentration when solubilized in pure water. Free from any screening buffer, we assessed the interactions between the different peptide oligomers and counterions in solutions, above and below the critical assembly concentration. Our results provide explanations for the selection of a dimeric building block instead of a monomeric one. Indeed, the apparent charge of the dimers is lower than that of the monomers because of strong chemisorption. This phenomenon has two consequences: (i) the dimer-dimer interaction is less repulsive than the monomer-monomer one and (ii) the lowered charge of the dimeric building block weakens the electrostatic repulsion from the positively charged NT walls. Moreover, additional counterion condensation (physisorption) occurs on the NT wall. We furthermore show that the counterions interacting with the NTs play a structural role as they tune the NTs diameter. We demonstrate by a simple model that counterions adsorption sites located on the inner face of the NT walls are responsible for this size control.
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Affiliation(s)
- Frédéric Gobeaux
- Institut de Biologie et de Technologies de Saclay/Service de Bioénergétique, Biologie Structurale et Mécanismes, Commissariat à l'Énergie Atomique et aux Énergies Alternatives-Saclay, 91191 Gif-sur-Yvette, France.
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Henry E, Dif A, Schmutz M, Legoff L, Amblard F, Marchi-Artzner V, Artzner F. Crystallization of fluorescent quantum dots within a three-dimensional bio-organic template of actin filaments and lipid membranes. Nano Lett 2011; 11:5443-5448. [PMID: 22074314 DOI: 10.1021/nl203216q] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [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
Biological molecules and molecular self-assemblies are promising templates to organize well-defined inorganic nanostructures. We demonstrate the ability of a self-assembled three-dimensional crystal template of helical actin protein filaments and lipids bilayers to generate a hierarchical self-assembly of quantum dots. Functionnalized tricystein peptidic quantum dots (QDs) are incorporated during the dynamical self-assembly of this actin/lipid template resulting in the formation of crystalline fibers. The crystal parameters, 26.5×18.9×35.5 nm3, are imposed by the membrane thickness, the diameter, and the pitch of the actin self-assembly. This process ensures the high quality of the crystal and results in unexpected fluorescence properties. This method of preparation offers opportunities to generate crystals with new symmetries and a large range of distance parameters.
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Affiliation(s)
- Etienne Henry
- Institut de Physique de Rennes, UMR 6251 CNRS, Université Rennes 1, Avenue du Général Leclerc, 35042 Rennes Cedex, France
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Tarabout C, Roux S, Gobeaux F, Fay N, Pouget E, Meriadec C, Ligeti M, Thomas D, IJsselstijn M, Besselievre F, Buisson DA, Verbavatz JM, Petitjean M, Valéry C, Perrin L, Rousseau B, Artzner F, Paternostre M, Cintrat JC. Control of peptide nanotube diameter by chemical modifications of an aromatic residue involved in a single close contact. Proc Natl Acad Sci U S A 2011; 108:7679-84. [PMID: 21518895 PMCID: PMC3093526 DOI: 10.1073/pnas.1017343108] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Supramolecular self-assembly is an attractive pathway for bottom-up synthesis of novel nanomaterials. In particular, this approach allows the spontaneous formation of structures of well-defined shapes and monodisperse characteristic sizes. Because nanotechnology mainly relies on size-dependent physical phenomena, the control of monodispersity is required, but the possibility of tuning the size is also essential. For self-assembling systems, shape, size, and monodispersity are mainly settled by the chemical structure of the building block. Attempts to change the size notably by chemical modification usually end up with the loss of self-assembly. Here, we generated a library of 17 peptides forming nanotubes of monodisperse diameter ranging from 10 to 36 nm. A structural model taking into account close contacts explains how a modification of a few Å of a single aromatic residue induces a fourfold increase in nanotube diameter. The application of such a strategy is demonstrated by the formation of silica nanotubes of various diameters.
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Affiliation(s)
- Christophe Tarabout
- Unité Mixte de Recherche 6251, Centre National de la Recherche Scientifique and Université Rennes 1, F-35 Rennes, France
| | - Stéphane Roux
- Unité Mixte de Recherche 6251, Centre National de la Recherche Scientifique and Université Rennes 1, F-35 Rennes, France
- Institut de Biologie et de Technologies de Saclay/Service de Chimie Bioorganique et Marquage, Commissariat à l’Énergie Atomique et aux Energies Alternatives-Saclay, F-91191 Gif-sur-Yvette, France
| | - Frédéric Gobeaux
- Institut de Biologie et de Technologies de Saclay/Service de Bioénergétique, Biologie Structurale et Mécanismes, Commissariat à l’Énergie Atomique et aux Énergies Alternatives-Saclay, F-91191 Gif-sur-Yvette, France
- Unité de Recherche Associée 2096, Centre Nationale de la Recherche Scientifique, Commissariat à l’Énergie Atomique et aux Energies Alternatives-Saclay, F-91191 Gif-sur-Yvette, France
| | - Nicolas Fay
- Institut de Biologie et de Technologies de Saclay/Service de Bioénergétique, Biologie Structurale et Mécanismes, Commissariat à l’Énergie Atomique et aux Énergies Alternatives-Saclay, F-91191 Gif-sur-Yvette, France
- Unité de Recherche Associée 2096, Centre Nationale de la Recherche Scientifique, Commissariat à l’Énergie Atomique et aux Energies Alternatives-Saclay, F-91191 Gif-sur-Yvette, France
| | - Emilie Pouget
- Unité Mixte de Recherche 6251, Centre National de la Recherche Scientifique and Université Rennes 1, F-35 Rennes, France
| | - Cristelle Meriadec
- Unité Mixte de Recherche 6251, Centre National de la Recherche Scientifique and Université Rennes 1, F-35 Rennes, France
| | - Melinda Ligeti
- Institut de Biologie et de Technologies de Saclay/Service de Chimie Bioorganique et Marquage, Commissariat à l’Énergie Atomique et aux Energies Alternatives-Saclay, F-91191 Gif-sur-Yvette, France
| | - Daniel Thomas
- Unité Mixte de Recherche 6026, Centre National de la Recherche Scientifique and Université Rennes 1, F-35042 Rennes Cedex, France; and
| | - Maarten IJsselstijn
- Institut de Biologie et de Technologies de Saclay/Service de Chimie Bioorganique et Marquage, Commissariat à l’Énergie Atomique et aux Energies Alternatives-Saclay, F-91191 Gif-sur-Yvette, France
| | - François Besselievre
- Institut de Biologie et de Technologies de Saclay/Service de Chimie Bioorganique et Marquage, Commissariat à l’Énergie Atomique et aux Energies Alternatives-Saclay, F-91191 Gif-sur-Yvette, France
| | - David-Alexandre Buisson
- Institut de Biologie et de Technologies de Saclay/Service de Chimie Bioorganique et Marquage, Commissariat à l’Énergie Atomique et aux Energies Alternatives-Saclay, F-91191 Gif-sur-Yvette, France
| | - Jean-Marc Verbavatz
- Institut de Biologie et de Technologies de Saclay/Service de Bioénergétique, Biologie Structurale et Mécanismes, Commissariat à l’Énergie Atomique et aux Énergies Alternatives-Saclay, F-91191 Gif-sur-Yvette, France
- Unité de Recherche Associée 2096, Centre Nationale de la Recherche Scientifique, Commissariat à l’Énergie Atomique et aux Energies Alternatives-Saclay, F-91191 Gif-sur-Yvette, France
| | - Michel Petitjean
- Institut de Biologie et de Technologies de Saclay/Service de Bioénergétique, Biologie Structurale et Mécanismes, Commissariat à l’Énergie Atomique et aux Énergies Alternatives-Saclay, F-91191 Gif-sur-Yvette, France
- Unité de Recherche Associée 2096, Centre Nationale de la Recherche Scientifique, Commissariat à l’Énergie Atomique et aux Energies Alternatives-Saclay, F-91191 Gif-sur-Yvette, France
| | - Céline Valéry
- Ipsen-Pharma, san Feliu de Llobregat, Barcelona, Spain
| | - Lionel Perrin
- Institut de Biologie et de Technologies de Saclay/Service de Bioénergétique, Biologie Structurale et Mécanismes, Commissariat à l’Énergie Atomique et aux Énergies Alternatives-Saclay, F-91191 Gif-sur-Yvette, France
- Unité de Recherche Associée 2096, Centre Nationale de la Recherche Scientifique, Commissariat à l’Énergie Atomique et aux Energies Alternatives-Saclay, F-91191 Gif-sur-Yvette, France
| | - Bernard Rousseau
- Institut de Biologie et de Technologies de Saclay/Service de Chimie Bioorganique et Marquage, Commissariat à l’Énergie Atomique et aux Energies Alternatives-Saclay, F-91191 Gif-sur-Yvette, France
| | - Franck Artzner
- Unité Mixte de Recherche 6251, Centre National de la Recherche Scientifique and Université Rennes 1, F-35 Rennes, France
| | - Maité Paternostre
- Institut de Biologie et de Technologies de Saclay/Service de Bioénergétique, Biologie Structurale et Mécanismes, Commissariat à l’Énergie Atomique et aux Énergies Alternatives-Saclay, F-91191 Gif-sur-Yvette, France
- Unité de Recherche Associée 2096, Centre Nationale de la Recherche Scientifique, Commissariat à l’Énergie Atomique et aux Energies Alternatives-Saclay, F-91191 Gif-sur-Yvette, France
| | - Jean-Christophe Cintrat
- Institut de Biologie et de Technologies de Saclay/Service de Chimie Bioorganique et Marquage, Commissariat à l’Énergie Atomique et aux Energies Alternatives-Saclay, F-91191 Gif-sur-Yvette, France
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Pouget E, Fay N, Dujardin E, Jamin N, Berthault P, Perrin L, Pandit A, Rose T, Valéry C, Thomas D, Paternostre M, Artzner F. Elucidation of the self-assembly pathway of lanreotide octapeptide into beta-sheet nanotubes: role of two stable intermediates. J Am Chem Soc 2010; 132:4230-41. [PMID: 20199027 DOI: 10.1021/ja9088023] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Nanofabrication by molecular self-assembly involves the design of molecules and self-assembly strategies so that shape and chemical complementarities drive the units to organize spontaneously into the desired structures. The power of self-assembly makes it the ubiquitous strategy of living organized matter and provides a powerful tool to chemists. However, a challenging issue in the self-assembly of complex supramolecular structures is to understand how kinetically efficient pathways emerge from the multitude of possible transition states and routes. Unfortunately, very few systems provide an intelligible structure and formation mechanism on which new models can be developed. Here, we elucidate the molecular and supramolecular self-assembly mechanism of synthetic octapeptide into nanotubes in equilibrium conditions. Their complex hierarchical self-assembly has recently been described at the mesoscopic level, and we show now that this system uniquely exhibits three assembly stages and three intermediates: (i) a peptide dimer is evidenced by both analytical centrifugation and NMR translational diffusion experiments; (ii) an open ribbon and (iii) an unstable helical ribbon are both visualized by transmission electron microscopy and characterized by small angle X-ray scattering. Interestingly, the structural features of two stable intermediates are related to the final nanotube organization as they set, respectively, the nanotube wall thickness and the final wall curvature radius. We propose that a specific self-assembly pathway is selected by the existence of such preorganized and stable intermediates so that a unique final molecular organization is kinetically favored. Our findings suggests that the rational design of oligopeptides can encode both molecular- and macro-scale morphological characteristics of their higher-order assemblies, thus opening the way to ultrahigh resolution peptide scaffold engineering.
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Affiliation(s)
- Emilie Pouget
- Institut de Physique de Rennes, UMR 6251 CNRS & Universite Rennes 1, 263 Avenue du general Leclerc, F-35042 Rennes Cedex, France
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49
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Molard Y, Dorson F, Cîrcu V, Roisnel T, Artzner F, Cordier S. Clustomesogens: Liquid Crystal Materials Containing Transition-Metal Clusters. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201000325] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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50
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Berchel M, Mériadec C, Lemiègre L, Artzner F, Jeftić J, Benvegnu T. Supramolecular Structures Based on New Bolaamphiphile Molecules Investigated by Small Angle and Wide Angle X-ray Scattering and Polarized Optical Microscopy. J Phys Chem B 2009; 113:15433-44. [DOI: 10.1021/jp905747r] [Citation(s) in RCA: 10] [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: 11/28/2022]
Affiliation(s)
- Mathieu Berchel
- UMR CNRS 6226, Sciences Chimiques de Rennes, Equipe Chimie Organique et Supramoléculaire, Ecole Nationale Supérieure de Chimie de Rennes, Avenue du Général Leclerc, CS 50837, 35708 Rennes cedex 7, France, Institut de Physique de Rennes, UMR CNRS 6251, Université Rennes 1, 263, Avenue du Général Leclerc, 35042 Rennes cedex, France, and Université Européenne de Bretagne, 5 boulevard Laënnec, 35000 Rennes, France
| | - Cristelle Mériadec
- UMR CNRS 6226, Sciences Chimiques de Rennes, Equipe Chimie Organique et Supramoléculaire, Ecole Nationale Supérieure de Chimie de Rennes, Avenue du Général Leclerc, CS 50837, 35708 Rennes cedex 7, France, Institut de Physique de Rennes, UMR CNRS 6251, Université Rennes 1, 263, Avenue du Général Leclerc, 35042 Rennes cedex, France, and Université Européenne de Bretagne, 5 boulevard Laënnec, 35000 Rennes, France
| | - Loïc Lemiègre
- UMR CNRS 6226, Sciences Chimiques de Rennes, Equipe Chimie Organique et Supramoléculaire, Ecole Nationale Supérieure de Chimie de Rennes, Avenue du Général Leclerc, CS 50837, 35708 Rennes cedex 7, France, Institut de Physique de Rennes, UMR CNRS 6251, Université Rennes 1, 263, Avenue du Général Leclerc, 35042 Rennes cedex, France, and Université Européenne de Bretagne, 5 boulevard Laënnec, 35000 Rennes, France
| | - Franck Artzner
- UMR CNRS 6226, Sciences Chimiques de Rennes, Equipe Chimie Organique et Supramoléculaire, Ecole Nationale Supérieure de Chimie de Rennes, Avenue du Général Leclerc, CS 50837, 35708 Rennes cedex 7, France, Institut de Physique de Rennes, UMR CNRS 6251, Université Rennes 1, 263, Avenue du Général Leclerc, 35042 Rennes cedex, France, and Université Européenne de Bretagne, 5 boulevard Laënnec, 35000 Rennes, France
| | - Jelena Jeftić
- UMR CNRS 6226, Sciences Chimiques de Rennes, Equipe Chimie Organique et Supramoléculaire, Ecole Nationale Supérieure de Chimie de Rennes, Avenue du Général Leclerc, CS 50837, 35708 Rennes cedex 7, France, Institut de Physique de Rennes, UMR CNRS 6251, Université Rennes 1, 263, Avenue du Général Leclerc, 35042 Rennes cedex, France, and Université Européenne de Bretagne, 5 boulevard Laënnec, 35000 Rennes, France
| | - Thierry Benvegnu
- UMR CNRS 6226, Sciences Chimiques de Rennes, Equipe Chimie Organique et Supramoléculaire, Ecole Nationale Supérieure de Chimie de Rennes, Avenue du Général Leclerc, CS 50837, 35708 Rennes cedex 7, France, Institut de Physique de Rennes, UMR CNRS 6251, Université Rennes 1, 263, Avenue du Général Leclerc, 35042 Rennes cedex, France, and Université Européenne de Bretagne, 5 boulevard Laënnec, 35000 Rennes, France
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