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Mrázek J, Sita J, Ondreáš F, Zubov A, Chmelař J. Homogeneous films from amphiphilic hyaluronan and their characterization by confocal microscopy and nanoindentation. Carbohydr Polym 2024; 340:122331. [PMID: 38858014 DOI: 10.1016/j.carbpol.2024.122331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2024] [Revised: 05/02/2024] [Accepted: 05/25/2024] [Indexed: 06/12/2024]
Abstract
Self-supporting films from amphiphilic hyaluronan are suitable for medical applications like wound dressings or resorbable implants. These films are typically cast from water/alcohol solutions. However, when the mixed solvent evaporates in ambient air, convection flows develop in the solution and become imprinted in the film, potentially compromising its properties. Consequently, we developed a novel film manufacturing method: drying in a closed box under saturated vapour conditions. Using this approach, we prepared a series of optically clear lauroyl-hyaluronan (LHA) films with uniform thickness and compared them to their air-dried counterparts. We first evaluated swelling ratios and elastic moduli for LHA films with varying degrees of substitution. The box-dried films swelled significantly less and were 1-2 orders of magnitude stiffer than air-dried films from the same LHA sample. Confocal microscopy revealed that box-dried films exhibited a regular microstructure, while air-dried films displayed a pore-size gradient and strong microstructure modulation due to convection flows. Local elastic modulus variations arising from these microstructures were assessed using nanoindentation mapping. Importantly, achieving the desired film stiffness requires much lower polymer modification when box-drying is used, enhancing the biological response to the material. These findings have implications for all polysaccharide formulations that utilize mixed solvents.
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Affiliation(s)
- Jiří Mrázek
- Contipro a.s., Dolní Dobrouč 401, 561 02 Dolní Dobrouč, Czech Republic.
| | - Jaroslav Sita
- Contipro a.s., Dolní Dobrouč 401, 561 02 Dolní Dobrouč, Czech Republic; Brno University of Technology, Central European Institute of Technology, Purkyňova 656/123, 612 00 Brno, Czech Republic
| | - František Ondreáš
- Contipro a.s., Dolní Dobrouč 401, 561 02 Dolní Dobrouč, Czech Republic; Brno University of Technology, Central European Institute of Technology, Purkyňova 656/123, 612 00 Brno, Czech Republic
| | - Alexandr Zubov
- University of Chemistry and Technology, Department of Chemical Engineering, Technická 5, 166 28 Prague, Czech Republic
| | - Josef Chmelař
- Contipro a.s., Dolní Dobrouč 401, 561 02 Dolní Dobrouč, Czech Republic
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Horáčková L, Chmelíčková K, Hermannová M, Pitucha T, Vágnerová H, Židek O, Velebný V, Chmelař J. Water-insoluble fibres, threads, and fabrics from lauroyl derivatives of hyaluronan. Int J Biol Macromol 2023; 234:123654. [PMID: 36780961 DOI: 10.1016/j.ijbiomac.2023.123654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2022] [Revised: 02/07/2023] [Accepted: 02/08/2023] [Indexed: 02/13/2023]
Abstract
Hyaluronan (HA) is a naturally occurring polysaccharide widely used in medicine and cosmetics. To further broaden its potential, various HA derivatives have been developed with the aim of reducing solubility, slowing degradation, or providing other beneficial properties. However, for most medical applications, these derivatives must be processed into suitable forms. Here we present water-insoluble fibres prepared from lauroyl-modified HA using a wet spinning process. Important properties of the fibres, such as swelling or the degradation rate, can be fine-tuned by adjusting the degree of HA modification. Due to their mechanical properties, the lauroyl HA fibres can be easily processed into threads and subsequently into fabrics of various sizes, shapes, and degrees of porosity. In addition, in vitro cytotoxicity testing of the fibres showed that they were non-cytotoxic. Overall, our results suggest that lauroyl HA fibres are a promising material that could be used to develop a variety of medical devices.
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Affiliation(s)
- Lucie Horáčková
- Contipro a.s., Dolní Dobrouč 401, 561 02 Dolní Dobrouč, Czech Republic; Institute of Organic Chemistry and Technology, Faculty of Chemical Technology, University of Pardubice, Studentská 95, 532 10 Pardubice, Czech Republic
| | | | | | - Tomáš Pitucha
- Contipro a.s., Dolní Dobrouč 401, 561 02 Dolní Dobrouč, Czech Republic
| | - Hana Vágnerová
- Contipro a.s., Dolní Dobrouč 401, 561 02 Dolní Dobrouč, Czech Republic
| | - Ondřej Židek
- Contipro a.s., Dolní Dobrouč 401, 561 02 Dolní Dobrouč, Czech Republic
| | - Vladimír Velebný
- Contipro a.s., Dolní Dobrouč 401, 561 02 Dolní Dobrouč, Czech Republic
| | - Josef Chmelař
- Contipro a.s., Dolní Dobrouč 401, 561 02 Dolní Dobrouč, Czech Republic.
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Brtková B, Hermannová M, Chmelař J, Nešporová K, Kocurková A, Kubala L, Ambrožová G, Velebný V, Šimek M. Intraperitoneally administered native and lauroyl-modified hyaluronan films: Pharmacokinetic and metabolism studies. Carbohydr Polym 2023; 299:120201. [PMID: 36876812 DOI: 10.1016/j.carbpol.2022.120201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Revised: 09/16/2022] [Accepted: 10/05/2022] [Indexed: 11/09/2022]
Abstract
Hyaluronan is being investigated extensively as a biocompatible and biodegradable material for use in biomedical applications. While the derivatization of hyaluronan broadens its potential therapeutic use, the pharmacokinetics and metabolization of the derivatives must be thoroughly investigated. The fate of intraperitoneally-applied native and lauroyl-modified hyaluronan films with varying degrees of substitution was investigated in-vivo employing an exclusive stable isotope-labelling approach and LC-MS analysis. The materials were gradually degraded in peritoneal fluid, lymphatically absorbed, preferentially metabolized in the liver and eliminated without any observable accumulation in the body. Hyaluronan acylation prolongs its presence in the peritoneal cavity depending on the degree of substitution. The safety of acylated hyaluronan derivatives was confirmed via a metabolic study that revealed its degradation into non-toxic metabolites, i.e. native hyaluronan and free fatty acid. Stable isotope-labelling with LC-MS tracking comprises a high-quality procedure for the investigation of the metabolism and biodegradability of hyaluronan-based medical products in-vivo.
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Affiliation(s)
- Barbora Brtková
- Contipro a.s., Dolní Dobrouč 401, 56102 Dolní Dobrouč, Czech Republic; Department of Analytical Chemistry, Faculty of Science, Palacký University, Olomouc, Czech Republic
| | | | - Josef Chmelař
- Contipro a.s., Dolní Dobrouč 401, 56102 Dolní Dobrouč, Czech Republic
| | | | - Anna Kocurková
- International Clinical Research Center, St. Anne's University Hospital Brno, Brno, Czech Republic; Institute of Biophysics of the Czech Academy of Sciences, Brno, Czech Republic; Institute of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czech Republic
| | - Lukáš Kubala
- International Clinical Research Center, St. Anne's University Hospital Brno, Brno, Czech Republic; Institute of Biophysics of the Czech Academy of Sciences, Brno, Czech Republic; Institute of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czech Republic
| | - Gabriela Ambrožová
- Institute of Biophysics of the Czech Academy of Sciences, Brno, Czech Republic
| | - Vladimír Velebný
- Contipro a.s., Dolní Dobrouč 401, 56102 Dolní Dobrouč, Czech Republic
| | - Matěj Šimek
- Contipro a.s., Dolní Dobrouč 401, 56102 Dolní Dobrouč, Czech Republic.
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Wu Z, Li H, Zhao X, Ye F, Zhao G. Hydrophobically modified polysaccharides and their self-assembled systems: A review on structures and food applications. Carbohydr Polym 2022; 284:119182. [DOI: 10.1016/j.carbpol.2022.119182] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2021] [Revised: 12/27/2021] [Accepted: 01/21/2022] [Indexed: 01/05/2023]
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Adsorption/desorption behavior of hyaluronic acid fragments at charged hydrophobic surface. Carbohydr Polym 2022; 277:118831. [PMID: 34893248 DOI: 10.1016/j.carbpol.2021.118831] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Revised: 10/25/2021] [Accepted: 10/27/2021] [Indexed: 12/11/2022]
Abstract
This work reveals the growing potential of novel electrochemical methods that are applicable for polysaccharides. It was shown for the first time that the molecules of hyaluronic acid (HA) exhibit electrochemical response using phase-sensitive alternating current (AC) voltammetry in phase-out mode. Adsorption and desorption processes of HA fragments at a charged interface of mercury electrode were observed in buffered HA solutions. Electrostatic and hydrophobic manners of interactions were distinguished for native hyaluronan fragments in a wide electric potential range. The AC voltammetry response depended on the temperature, concentration, and length of HA chains. Results of this work open possibilities for further structural characterization of widely used HA fragments and understanding manners of interactions with charged hydrophobic surfaces that could be useful in the future for understanding HA interactions at biological levels.
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Mrázek J, Kohout J, Kmječ T, Nešporová K, Chmelař J, Kubala L, Velebný V. Insoluble hyaluronan films obtained by heterogeneous crosslinking with iron(III) as resorbable implants. Int J Biol Macromol 2021; 191:201-210. [PMID: 34543627 DOI: 10.1016/j.ijbiomac.2021.09.059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 09/08/2021] [Accepted: 09/09/2021] [Indexed: 10/20/2022]
Abstract
We present water-insoluble hyaluronan films crosslinked by trivalent iron developed as potential resorbable implants. The films were crosslinked by sorption of ferric salt into solid HA films in water/2-propanol bath. These heterogeneously crosslinked films (het-FeHA) remained tough and dimensionally stable when rehydrated in saline. In contrast, films prepared by drying the well-known homogeneous ferric hyaluronate gels (hom-FeHA) softened upon rehydration and expanded rapidly. Differences between hom-FeHA and het-FeHA result from polymer network topology (dominant inter- or intra-molecular crosslink, respectively). Moreover, Mössbauer spectroscopy of het-FeHA revealed diiron complexes, while iron in the hom-FeHA was present exclusively as γ-FeOOH nanoparticles or amorphous FeOOH. The biocompatibility tests of het-FeHA did not show any adverse effect and the sample disintegrated within one day when implanted in mice peritoneum. In conclusion, we developed implantable hyaluronan-based free-standing film with minimal swelling that can be resorbed quickly enough to avoid induction of foreign-body reaction.
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Affiliation(s)
- Jiří Mrázek
- Contipro a.s., Dolní Dobrouč 401, 56102 Dolní Dobrouč, Czechia; Department of Medical Biophysics and Medical Informatics, Third Faculty of Medicine, Charles University, Prague, Czechia.
| | - Jaroslav Kohout
- Faculty of Mathematics and Physics, Charles University, V Holešovičkách 2, 18000 Prague 8, Czechia
| | - Tomáš Kmječ
- Faculty of Mathematics and Physics, Charles University, V Holešovičkách 2, 18000 Prague 8, Czechia
| | | | - Josef Chmelař
- Contipro a.s., Dolní Dobrouč 401, 56102 Dolní Dobrouč, Czechia
| | - Lukáš Kubala
- Institute of Biophysics of the Czech Academy of Sciences, Královopolská 135, 612 65 Brno, Czechia; International Clinical Research Center, St. Anne's University Hospital, Pekařská 53, 656 91 Brno, Czechia
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Kutálková E, Hrnčiřík J, Witasek R, Ingr M, Huerta-Ángeles G, Hermannová M, Velebný V. The rate and evenness of the substitutions on hyaluronan grafted by dodecanoic acid influenced by the mixed-solvent composition. Int J Biol Macromol 2021; 189:826-836. [PMID: 34428490 DOI: 10.1016/j.ijbiomac.2021.08.137] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Revised: 08/13/2021] [Accepted: 08/14/2021] [Indexed: 12/14/2022]
Abstract
In this work, low molecular weight (17 kDa) hyaluronan was modified by dodecanoyl substituents. The activation of dodecanoic acid was mediated by benzoyl chloride towards the preparation of a mixed anhydride, which reacts in a second step with HA in water mixed with an organic solvent. The effect of the cosolvent was studied and showed an even distribution of substituents and higher reaction rate in water: 1,4-dioxane compared to water:tert-butanol where substituents occupy adjacent positions. The chemical characterization of the prepared derivatives was elucidated by NMR, FTIR spectroscopy, thermal analyses, and gas chromatography, while the distribution of substituents was evaluated by enzymatic degradation. Molecular-dynamics simulations reveal opposite solvent separations around HA and dodecanoyl chains, that is stronger in water:tert-butanol solution. The resulting incompatibility of solvation-shells of the two entities repels the reaction intermediates from the HA chain and drives them towards the already bound substituents, explaining the observed differences in the distribution evenness. Thus, the influence of the solvent on the reaction selectivity is observed by shielding reactive sites around HA. Therefore, a control of the distribution of the substituents was obtained by defining the concentration of HA and used cosolvent.
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Affiliation(s)
- Eva Kutálková
- Tomas Bata University in Zlín, Faculty of Technology, Department of Physics and Materials Engineering, Nám. T.G. Masaryka 5555, 76001 Zlín, Czech Republic
| | - Josef Hrnčiřík
- Tomas Bata University in Zlín, Faculty of Technology, Department of Physics and Materials Engineering, Nám. T.G. Masaryka 5555, 76001 Zlín, Czech Republic
| | - Roman Witasek
- Tomas Bata University in Zlín, Faculty of Technology, Department of Physics and Materials Engineering, Nám. T.G. Masaryka 5555, 76001 Zlín, Czech Republic
| | - Marek Ingr
- Tomas Bata University in Zlín, Faculty of Technology, Department of Physics and Materials Engineering, Nám. T.G. Masaryka 5555, 76001 Zlín, Czech Republic; Charles University, Faculty of Science, Department of Biochemistry, Hlavova 8/2030, 12843 Praha 2, Czech Republic.
| | | | | | - Vladimír Velebný
- Contipro a.s., Dolní Dobrouč 401, 561 02 Dolní Dobrouč, Czech Republic
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Lauroyl hyaluronan films for local drug delivery: Preparation and factors influencing the release of small molecules. Int J Pharm 2021; 608:121111. [PMID: 34547392 DOI: 10.1016/j.ijpharm.2021.121111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 09/12/2021] [Accepted: 09/14/2021] [Indexed: 11/21/2022]
Abstract
Lauroyl derivatives of hyaluronan are safe and biodegradable materials that seem promising for application in medicine. However, their potential in the field of drug delivery was not yet explored. We thus prepared lauroyl hyaluronan films loaded with various drugs and studied the effects of lauroyl hyaluronan properties, drug hydrophobicity and medium composition on the drug release. Since biomolecules will always be present in real clinical applications, media supplemented by albumin were also included. The amphiphilic character of lauroyl hyaluronan enabled convenient loading of the films by both hydrophilic and hydrophobic drugs. Dominant factors influencing drug release were drug hydrophobicity and the presence of albumin. Hydrophilic diclofenac was released rapidly in all cases, while triclosan with medium hydrophobicity exhibited slower release sensitive to other parameters, reaching equilibrium values in the used experimental setup. The release of hydrophobic octenidine into pure buffer was almost negligible, but the addition of albumin did promote its release. The strong effect of albumin highlights the importance of considering biomolecules in the design of release experiments.
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Antimicrobial nanofibrous mats with controllable drug release produced from hydrophobized hyaluronan. Carbohydr Polym 2021; 267:118225. [PMID: 34119178 DOI: 10.1016/j.carbpol.2021.118225] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Revised: 04/23/2021] [Accepted: 05/16/2021] [Indexed: 12/19/2022]
Abstract
Due to their large active surface, high loading efficiency, and tunable dissolution profiles, nanofibrous mats are often cited as promising drug carriers or antimicrobial membranes. Hyaluronic acid has outstanding biocompatibility, but it is hydrophilic. Nanofibrous structures made from hyaluronan dissolve immediately, making them unsuitable for controlled drug release and longer applications. We aimed to prepare a hyaluronan-based antimicrobial nanofibrous material, which would retain its integrity in aqueous environments. Self-supporting nanofibrous mats containing octenidine dihydrochloride or triclosan were produced by electrospinning from hydrophobized hyaluronan modified with a symmetric lauric acid anhydride. The nanofibrous mats required no cross-linking to be stable in PBS for 7 days. The encapsulation efficiency of antiseptics was nearly 100%. Minimal release of octenidine was observed, while up to 30% of triclosan was gradually released in 72 h. The nanofibrous materials exhibited antimicrobial activity, the fibroblast viability was directly dependent on the antiseptic content and its release.
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Analysis of hyaluronan and its derivatives using chromatographic and mass spectrometric techniques. Carbohydr Polym 2020; 250:117014. [DOI: 10.1016/j.carbpol.2020.117014] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Revised: 08/10/2020] [Accepted: 08/26/2020] [Indexed: 01/15/2023]
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Formulation of hyaluronan grafted with dodecanoic acid as a potential ophthalmic treatment. Carbohydr Polym 2020; 246:116578. [DOI: 10.1016/j.carbpol.2020.116578] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 06/01/2020] [Accepted: 06/03/2020] [Indexed: 01/05/2023]
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