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Cheah E, Bansal M, Nguyen L, Chalard A, Malmström J, O'Carroll SJ, Connor B, Wu Z, Svirskis D. Electrically responsive release of proteins from conducting polymer hydrogels. Acta Biomater 2023; 158:87-100. [PMID: 36640949 DOI: 10.1016/j.actbio.2023.01.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Revised: 12/21/2022] [Accepted: 01/05/2023] [Indexed: 01/13/2023]
Abstract
Electrically modulated delivery of proteins provides an avenue to target local tissues specifically and tune the dose to the application. This approach prolongs and enhances activity at the target site whilst reducing off-target effects associated with systemic drug delivery. The work presented here explores an electrically active composite material comprising of a biocompatible hydrogel, gelatin methacryloyl (GelMA) and a conducting polymer, poly(3,4-ethylenedioxythiophene), generating a conducting polymer hydrogel. In this paper, the key characteristics of electroactivity, mechanical properties, and morphology are characterized using electrochemistry techniques, atomic force, and scanning electron microscopy. Cytocompatibility is established through exposure of human cells to the materials. By applying different electrical-stimuli, the short-term release profiles of a model protein can be controlled over 4 h, demonstrating tunable delivery patterns. This is followed by extended-release studies over 21 days which reveal a bimodal delivery mechanism influenced by both GelMA degradation and electrical stimulation events. This data demonstrates an electroactive and cytocompatible material suitable for the delivery of protein payloads over 3 weeks. This material is well suited for use as a treatment delivery platform in tissue engineering applications where targeted and spatio-temporal controlled delivery of therapeutic proteins is required. STATEMENT OF SIGNIFICANCE: Growth factor use in tissue engineering typically requires sustained and tunable delivery to generate optimal outcomes. While conducting polymer hydrogels (CPH) have been explored for the electrically responsive release of small bioactives, we report on a CPH capable of releasing a protein payload in response to electrical stimulus. The composite material combines the benefits of soft hydrogels acting as a drug reservoir and redox-active properties from the conducting polymer enabling electrical responsiveness. The CPH is able to sustain protein delivery over 3 weeks, with electrical stimulus used to modulate release. The described material is well suited as a treatment delivery platform to deliver large quantities of proteins in applications where spatio-temporal delivery patterns are paramount.
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Affiliation(s)
- Ernest Cheah
- School of Pharmacy, Faculty of Medical and Health Sciences, University of Auckland, Private Bag 92019, Auckland, New Zealand
| | - Mahima Bansal
- School of Pharmacy, Faculty of Medical and Health Sciences, University of Auckland, Private Bag 92019, Auckland, New Zealand
| | - Linh Nguyen
- Department of Pharmacology and Clinical Pharmacology, School of Medical Sciences Faculty of Medical and Health Sciences, University of Auckland, Private Bag 92019, Auckland, New Zealand
| | - Anaïs Chalard
- Department of Chemical and Materials Engineering, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
| | - Jenny Malmström
- MacDiarmid Institute for Advanced Materials and Nanotechnology, Victoria University of Wellington, P.O. Box 600, Wellington 6140, New Zealand; Department of Anatomy and Medical Imaging, School of Medical Sciences, Faculty of Medical and Health Sciences, University of Auckland, Private Bag 92019, Auckland, New Zealand
| | - Simon J O'Carroll
- Department of Anatomy and Medical Imaging, School of Medical Sciences, Faculty of Medical and Health Sciences, University of Auckland, Private Bag 92019, Auckland, New Zealand
| | - Bronwen Connor
- Department of Pharmacology and Clinical Pharmacology, School of Medical Sciences Faculty of Medical and Health Sciences, University of Auckland, Private Bag 92019, Auckland, New Zealand
| | - Zimei Wu
- School of Pharmacy, Faculty of Medical and Health Sciences, University of Auckland, Private Bag 92019, Auckland, New Zealand
| | - Darren Svirskis
- School of Pharmacy, Faculty of Medical and Health Sciences, University of Auckland, Private Bag 92019, Auckland, New Zealand.
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O'Neil AT, Chalard A, Malmström J, Kitchen JA. White light and colour-tunable emission from a single component europium-1,8-naphthalimide thin film. Dalton Trans 2023; 52:2255-2261. [PMID: 36757868 DOI: 10.1039/d2dt03644d] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
Abstract
The synthesis and fabrication of spin coated films of a new Eu3+ complex [Eu(1)3] derived from the 1,8-naphthalimide containing ligand 1H is presented. The complex is multi-emissive displaying blue emission from the 1,8-naphthalimide fluorophore and red emission from the Eu3+ centre in both solution-state and solid-state. This allows the overall emission to be tuned by changing the excitaton wavelength, where varing degrees of red and blue emission intensity alter the overall emission colour from blue, to red and including white-light emission. The complex was spin-coated onto quartz slides giving 134 nm thick coatings that retained the multi-emissive and colour tunable properties. Overall, resulting in a colour-tunable system which in solution, solid, and thin film states can alter the overall colour from deep red to dark blue.
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Affiliation(s)
- Alex T O'Neil
- School of Natural Sciences, Massey University, Auckland, New Zealand.
| | - Anaïs Chalard
- Department of Chemical and Materials Engineering, University of Auckland, Auckland 1142, New Zealand.,The MacDiarmid Institute for Advanced Materials and Nanotechnology, Wellington, New Zealand
| | - Jenny Malmström
- Department of Chemical and Materials Engineering, University of Auckland, Auckland 1142, New Zealand.,The MacDiarmid Institute for Advanced Materials and Nanotechnology, Wellington, New Zealand
| | - Jonathan A Kitchen
- School of Natural Sciences, Massey University, Auckland, New Zealand. .,The MacDiarmid Institute for Advanced Materials and Nanotechnology, Wellington, New Zealand
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Sabour M, Chalard A, Merlin E, Lambert C, Verdan M, Dauphin C. Pericarditis in children: A 10-year descriptive study and evaluation of prognostic factors. Archives of Cardiovascular Diseases Supplements 2022. [DOI: 10.1016/j.acvdsp.2022.07.038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Bordignon D, Lonetti B, Coudret C, Roblin P, Joseph P, Malaquin L, Chalard A, Fitremann J. Wet spinning of a library of carbohydrate low molecular weight gels. J Colloid Interface Sci 2021; 603:333-343. [PMID: 34197983 DOI: 10.1016/j.jcis.2021.06.058] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Revised: 06/08/2021] [Accepted: 06/09/2021] [Indexed: 11/27/2022]
Abstract
HYPOTHESIS Recently, a low molecular weight hydrogel based on a carbohydrate alkyl amide has been successfully used as biomaterial for neuron cell culture and for 3D printing. Varying the molecular structure should make it possible to extend the library of carbohydrate low molecular weight hydrogels available for these applications and to improve their performances. EXPERIMENTS Thirteen molecules easy to synthetize and designed to be potentially biocompatible were prepared. They are based on gluconamide, glucoheptonamide, galactonamide, glucamide, aliphatic chains and glycine. Their gelation in water was investigated in thermal conditions and wet spinning conditions, namely by dimethylsulfoxide-water exchange under injection. FINDINGS Nine molecules give hydrogels in thermal conditions. By wet spinning, six molecules self-assemble fast enough, within few seconds, to form continous hydrogel filaments. Therefore, the method enables to shape by injection these mechanically fragile hydrogels, notably in the perspective of 3D printing. Depending on the molecular structure, persistent or soluble gel filaments are obtained. The microstructures are varied, featuring entangled ribbons, platelets or particles. In thermal gelation, molecules with a symmetrical polar head (galacto, glucoheptono) give flat ribbons and molecules with an asymmetrical polar head (gluco) give helical ribbons. The introduction of an extra glycine linker disturbs this trend.
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Affiliation(s)
- Delphine Bordignon
- Laboratoire des IMRCP, Université de Toulouse, CNRS UMR 5623, Université Toulouse III - Paul Sabatier, Toulouse, France.
| | - Barbara Lonetti
- Laboratoire des IMRCP, Université de Toulouse, CNRS UMR 5623, Université Toulouse III - Paul Sabatier, Toulouse, France
| | - Christophe Coudret
- Laboratoire des IMRCP, Université de Toulouse, CNRS UMR 5623, Université Toulouse III - Paul Sabatier, Toulouse, France.
| | - Pierre Roblin
- Laboratoire de Génie Chimique (LGC), Université de Toulouse, CNRS UMR 5503, Université Toulouse III - Paul Sabatier, Toulouse, France.
| | - Pierre Joseph
- LAAS-CNRS, Université de Toulouse, CNRS, UPS, Toulouse, France.
| | | | - Anaïs Chalard
- Laboratoire des IMRCP, Université de Toulouse, CNRS UMR 5623, Université Toulouse III - Paul Sabatier, Toulouse, France.
| | - Juliette Fitremann
- Laboratoire des IMRCP, Université de Toulouse, CNRS UMR 5623, Université Toulouse III - Paul Sabatier, Toulouse, France.
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Chalard A, Joseph P, Souleille S, Lonetti B, Saffon-Merceron N, Loubinoux I, Vaysse L, Malaquin L, Fitremann J. Wet spinning and radial self-assembly of a carbohydrate low molecular weight gelator into well organized hydrogel filaments. Nanoscale 2019; 11:15043-15056. [PMID: 31179473 DOI: 10.1039/c9nr02727k] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
In this work, we describe how a simple single low molecular weight gelator (LMWG) molecule - N-heptyl-d-galactonamide, which is easy to produce at the gram scale - is spun into gel filaments by a wet spinning process based on solvent exchange. A solution of the gelator in DMSO is injected into water and the solvent diffusion triggers the supramolecular self-assembly of the N-heptyl-d-galactonamide molecules into nanometric fibers. These fibers entrap around 97% of water, thus forming a highly hydrated hydrogel filament, deposited in a well organized coil and locally aligned. This self-assembly mechanism also leads to a very narrow distribution of the supramolecular fiber width, around 150 nm. In addition, the self-assembled fibers are oriented radially inside the wet-spun filaments and at a high flow rate, fibers are organized in spirals. As a result, this process gives rise to a high control of the gelator self-assembly compared with the usual thermal sol-gel transition. This method also opens the way to the controlled extrusion at room temperature of these very simple, soft, biocompatible but delicate hydrogels. The gelator concentration and the flow rates leading to the formation of the gel filaments have been screened. The filament diameter, its internal morphology, the solvent exchange and the velocity of the jet have been investigated by video image analysis and electron microscopy. The stability of these delicate hydrogel ropes has been studied, revealing a polymorphic transformation into macroscopic crystals with time under some storage conditions. The cell viability of a neuronal cell line on the filaments has also been estimated.
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Affiliation(s)
- Anaïs Chalard
- IMRCP, Université de Toulouse, CNRS, Bat 2R1, 118 Route de Narbonne, 31062 Toulouse Cedex 9, France.
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Vassel-Hitier J, Verdier V, Rasquier S, Chalard A, Laurent-Vannier A, Chevignard M. Language, intellectual and educational outcomes after moderate-to-severe traumatic brain injury sustained before the age of 18 months. Brain Inj 2019; 33:1105-1115. [DOI: 10.1080/02699052.2019.1623420] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Jeanne Vassel-Hitier
- Rehabilitation department for children and adolescents with acquired neurological injury, Saint-Maurice Hospitals, Saint-Maurice, France
| | - Valentine Verdier
- Outreach team for children and adolescents with acquired brain injury, Saint-Maurice Hospitals, Saint-Maurice, France
| | - Stéphanie Rasquier
- Rehabilitation department for children and adolescents with acquired neurological injury, Saint-Maurice Hospitals, Saint-Maurice, France
| | - Anaïs Chalard
- Rehabilitation department for children and adolescents with acquired neurological injury, Saint-Maurice Hospitals, Saint-Maurice, France
| | - Anne Laurent-Vannier
- Rehabilitation department for children and adolescents with acquired neurological injury, Saint-Maurice Hospitals, Saint-Maurice, France
- Outreach team for children and adolescents with acquired brain injury, Saint-Maurice Hospitals, Saint-Maurice, France
| | - Mathilde Chevignard
- Rehabilitation department for children and adolescents with acquired neurological injury, Saint-Maurice Hospitals, Saint-Maurice, France
- Outreach team for children and adolescents with acquired brain injury, Saint-Maurice Hospitals, Saint-Maurice, France
- Laboratoire d'Imagerie Biomédicale, LIB, Sorbonne Université, Inserm, CNRS, Paris, France
- GRC 18 HanCRe, Sorbonne Université, Paris, France
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Chalard A, Amarantini D, Belle M, Montane E, Gasq D. Impact of different EMG normalisation methods on muscle activations and cocontraction index in adults with chronic post-stroke hemiparesis. Ann Phys Rehabil Med 2018. [DOI: 10.1016/j.rehab.2018.05.1033] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Chalard A, Amarantini D, Tisseyre J, Marque P, Tallet J, Gasq D. Is spasticity or spastic cocontraction of the elbow flexors associated with the limitation of voluntary elbow extension in adults with acquired hemiparesis? Ann Phys Rehabil Med 2018. [DOI: 10.1016/j.rehab.2018.05.1020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Chalard A, Vaysse L, Joseph P, Malaquin L, Souleille S, Lonetti B, Sol JC, Loubinoux I, Fitremann J. Simple Synthetic Molecular Hydrogels from Self-Assembling Alkylgalactonamides as Scaffold for 3D Neuronal Cell Growth. ACS Appl Mater Interfaces 2018; 10:17004-17017. [PMID: 29757611 DOI: 10.1021/acsami.8b01365] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [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: 06/08/2023]
Abstract
In this work, we demonstrated that the hydrogel obtained from a very simple and single synthetic molecule, N-heptyl-galactonamide was a suitable scaffold for the growth of neuronal cells in 3D. We evidenced by confocal microscopy the presence of the cells into the gel up to a depth of around 200 μm, demonstrating that the latter was permissive to cell growth and enabled a true 3D colonization and organization. It also supported successfully the differentiation of adult human neuronal stem cells (hNSCs) into both glial and neuronal cells and the development of a really dense neurofilament network. So the gel appears to be a good candidate for neural tissue regeneration. In contrast with other molecular gels described for cell culture, the molecule can be obtained at the gram scale by a one-step reaction. The resulting gel is very soft, a quality in accordance with the aim of growing neuronal cells, that requires low modulus substrates similar to the brain. But because of its fragility, specific procedures had to be implemented for its preparation and for cell labeling and confocal microscopy observations. Notably, the implementation of a controlled slow cooling of the gel solution was needed to get a very soft but nevertheless cohesive gel. In these conditions, very wide straight and long micrometric fibers were formed, held together by a second network of flexible narrower nanometric fibers. The two kinds of fibers guided the neurite and glial cell growth in a different way. We also underlined the importance of a tiny difference in the molecular structure on the gel performances: parent molecules, differing by a one-carbon increment in the alkyl chain length, N-hexyl-galactonamide and N-octyl-galactonamide, were not as good as N-heptyl-galactonamide. Their differences were analyzed in terms of gel fibers morphology, mechanical properties, solubility, chain parity, and cell growth.
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Affiliation(s)
- Anaïs Chalard
- IMRCP, Université de Toulouse, CNRS, Bat 2R1 , 118 Route de Narbonne , 31062 Toulouse Cedex 9, France
- TONIC, Toulouse NeuroImaging Center , Université de Toulouse , Inserm , UPS , France
- LAAS-CNRS, Université de Toulouse, CNRS, UPS , Toulouse , France
| | - Laurence Vaysse
- TONIC, Toulouse NeuroImaging Center , Université de Toulouse , Inserm , UPS , France
| | - Pierre Joseph
- LAAS-CNRS, Université de Toulouse, CNRS, UPS , Toulouse , France
| | - Laurent Malaquin
- LAAS-CNRS, Université de Toulouse, CNRS, UPS , Toulouse , France
| | | | - Barbara Lonetti
- IMRCP, Université de Toulouse, CNRS, Bat 2R1 , 118 Route de Narbonne , 31062 Toulouse Cedex 9, France
| | - Jean-Christophe Sol
- TONIC, Toulouse NeuroImaging Center , Université de Toulouse , Inserm , UPS , France
- Centre Hospitalier Universitaire de Toulouse , Pôle Neurosciences , CHU Toulouse , France
| | - Isabelle Loubinoux
- TONIC, Toulouse NeuroImaging Center , Université de Toulouse , Inserm , UPS , France
| | - Juliette Fitremann
- IMRCP, Université de Toulouse, CNRS, Bat 2R1 , 118 Route de Narbonne , 31062 Toulouse Cedex 9, France
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Chalard A, Lang M, Cosserant B, Rusé F, Lusson J, Boeuf B, Dauphin C. The Amplatzer Duct Occluder II additional sizes device for transcatheter PDA closure in preterms infants: monocentric experience. Archives of Cardiovascular Diseases Supplements 2017. [DOI: 10.1016/s1878-6480(17)30332-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Chalard A, Lang M, Cosserant B, Rusé F, Lusson J, Boeuf B, Dauphin C. The Amplatzer Duct Occluder II Additional Sizes device for transcatheter PDA closure in preterms infants: monocentric experience. Archives of Cardiovascular Diseases Supplements 2016. [DOI: 10.1016/s1878-6480(16)30541-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Hascoët S, Jalal Z, Baruteau A, Mauri L, Acar P, Bouvaist H, Houeijeh A, Chalard A, Lusson J, Piéchaud J, Bouzguenda I, Thambo J, Godart F, Fraisse A. Stents in pediatric and adult congenital cardiac catheterization in France in 2013. Arch Cardiovasc Dis 2014. [DOI: 10.1016/j.acvd.2014.07.023] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Riou F, Chalard A, Chausset A, Lusson J, Merlin E, Dauphin C. Evaluation of coronary artery wall echogenicity in Kawasaki disease acute phase. Arch Cardiovasc Dis 2014. [DOI: 10.1016/j.acvd.2014.07.004] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Riou F, Chalard A, Chausset A, Lusson J, Merlin E, Dauphin C. SFP PC-63 – Valeur diagnostique de la mesure de l’échogénicité coronaire dans la maladie de Kawasaki. Arch Pediatr 2014. [DOI: 10.1016/s0929-693x(14)72213-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Chalard A, Sanchez I, Gouton M, Henaine R, Salami FA, Ninet J, Douek PC, Di Filippo S, Boussel L. Effect of pulmonary valve replacement on left ventricular fucntion in patients with tetralogy of fallot. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht308.1712] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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