1
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Liao Q, Ren H, Xu J, Wang P, Yuan B, Zhang H. Combined experiments and molecular simulations for understanding the thermo-responsive behavior and gelation of methylated glucans with different glycosidic linkages. J Colloid Interface Sci 2024; 674:315-325. [PMID: 38936088 DOI: 10.1016/j.jcis.2024.06.187] [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: 05/15/2024] [Revised: 06/13/2024] [Accepted: 06/24/2024] [Indexed: 06/29/2024]
Abstract
HYPOTHESIS Elucidation of the micro-mechanisms of sol-gel transition of gelling glucans with different glycosidic linkages is crucial for understanding their structure-property relationship and for various applications. Glucans with distinct molecular chain structures exhibit unique gelation behaviors. The disparate gelation phenomena observed in two methylated glucans, methylated (1,3)-β-d-glucan of curdlan (MECD) and methylated (1,4)-β-d-glucan of cellulose (MC), notwithstanding their equivalent degrees of substitution, are intricately linked to their unique molecular architectures and interactions between glucan and water. EXPERIMENTS Density functional theory and molecular dynamics simulations focused on the electronic property distinctions between MECD and MC, alongside conformational variations during thermal gelation. Inline attenuated total reflection Fourier transform infrared spectroscopy tracked secondary structure alterations in MECD and MC. To corroborate the simulation results, additional analyses including circular dichroism, rheology, and micro-differential scanning calorimetry were performed. FINDINGS Despite having similar thermally induced gel networks, MECD and MC display distinct physical gelation patterns and molecular-level conformational changes during gelation. The network of MC gel was formed via a "coil-to-ring" transition, followed by ring stacking. In contrast, the MECD gel comprised compact irregular helices accompanied by notable volume shrinkage. These variations in gelation behavior are ascribed to heightened hydrophobic interactions and diminished hydrogen bonding in both systems upon heating, resulting in gelation. These findings provide valuable insights into the microstructural changes during gelation and the thermo-gelation mechanisms of structurally similar polysaccharides.
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Affiliation(s)
- Qingyu Liao
- Advanced Rheology Institute, Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Huimin Ren
- Advanced Rheology Institute, Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Jiatong Xu
- Advanced Rheology Institute, Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Pengguang Wang
- Advanced Rheology Institute, Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Baihua Yuan
- Institute of Marine Equipment, Shanghai Jiao Tong University, Shanghai 200240, China.
| | - Hongbin Zhang
- Advanced Rheology Institute, Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, Shanghai Key Laboratory of Electrical Insulation and Thermal Aging, Shanghai Jiao Tong University, Shanghai 200240, China.
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2
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Lee H, Jung Y, Lee N, Lee I, Lee JH. Nature-Derived Polysaccharide-Based Composite Hydrogels for Promoting Wound Healing. Int J Mol Sci 2023; 24:16714. [PMID: 38069035 PMCID: PMC10706343 DOI: 10.3390/ijms242316714] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2023] [Revised: 11/20/2023] [Accepted: 11/23/2023] [Indexed: 12/18/2023] Open
Abstract
Numerous innovative advancements in dressing technology for wound healing have emerged. Among the various types of wound dressings available, hydrogel dressings, structured with a three-dimensional network and composed of predominantly hydrophilic components, are widely used for wound care due to their remarkable capacity to absorb abundant wound exudate, maintain a moisture environment, provide soothing and cooling effects, and mimic the extracellular matrix. Composite hydrogel dressings, one of the evolved dressings, address the limitations of traditional hydrogel dressings by incorporating additional components, including particles, fibers, fabrics, or foams, within the hydrogels, effectively promoting wound treatment and healing. The added elements enhance the features or add specific functionalities of the dressings, such as sensitivity to external factors, adhesiveness, mechanical strength, control over the release of therapeutic agents, antioxidant and antimicrobial properties, and tissue regeneration behavior. They can be categorized as natural or synthetic based on the origin of the main components of the hydrogel network. This review focuses on recent research on developing natural polysaccharide-based composite hydrogel wound dressings. It explores their preparation and composition, the reinforcement materials integrated into hydrogels, and therapeutic agents. Furthermore, it discusses their features and the specific types of wounds where applied.
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Affiliation(s)
| | | | | | | | - Jin Hyun Lee
- School of Bio-Convergence Science, College of Biomedical & Health Science, Konkuk University, Chungju 27478, Republic of Korea
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3
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Vítková L, Kazantseva N, Musilová L, Smolka P, Valášková K, Kocourková K, Humeník M, Minařík A, Humpolíček P, Mráček A, Smolková I. Magneto-responsive hyaluronan hydrogel for hyperthermia and bioprinting: Magnetic, rheological properties and biocompatibility. APL Bioeng 2023; 7:036113. [PMID: 37692374 PMCID: PMC10491462 DOI: 10.1063/5.0147181] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Revised: 03/05/2024] [Accepted: 08/21/2023] [Indexed: 09/12/2023] Open
Abstract
Magneto-responsive soft hydrogels are used for a number of biomedical applications, e.g., magnetic hyperthermia, drug delivery, tissue engineering, and neuromodulation. In this work, this type of hydrogel has been fabricated from hyaluronan (HA) filled with a binary system of Al2O3 nanoparticles and multicore magnetic particles (MCPs), which were obtained by clustering of superparamagnetic iron oxide FeOx NPs. It was established that the presence of diamagnetic Al2O3 has several positive effects: it enhances the hydrogel storage modulus and long-term stability in the cell cultivation medium; prevents the magnetic interaction among the MCPs. The HA hydrogel provides rapid heating of 0.3 °C per min under exposure to low amplitude radio frequency alternating magnetic field. Furthermore, the magneto-responsive hydrogel was successfully used to encapsulate cells and extrusion-based 3D printing with 87±6% cell viability, thus providing a bio-ink. The combination of high heating efficiency, softness, cytocompatibility, and 3D printability of magnetic HA hydrogel leads to a material suitable for biomedical applications.
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Affiliation(s)
- L. Vítková
- Faculty of Technology, Tomas Bata University in Zlin, Vavrečkova 5669, 76001 Zlín, Czech Republic
| | | | | | - P. Smolka
- Author to whom correspondence should be addressed:
| | - K. Valášková
- Centre of Polymer Systems, Tomas Bata University in Zlin, tř. Tomáše Bati 5678, 76001 Zlín, Czech Republic
| | | | - M. Humeník
- Department of Biomaterials, Faculty of Engineering Science, Universität Bayreuth, Prof.-Rüdiger-Bormann.Str. 1, 95447 Bayreuth, Germany
| | | | | | | | - I. Smolková
- Centre of Polymer Systems, Tomas Bata University in Zlin, tř. Tomáše Bati 5678, 76001 Zlín, Czech Republic
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4
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Reys LL, Silva SS, Soares da Costa D, Rodrigues LC, Reis RL, Silva TH. Building Fucoidan/Agarose-Based Hydrogels as a Platform for the Development of Therapeutic Approaches against Diabetes. Molecules 2023; 28:molecules28114523. [PMID: 37298999 DOI: 10.3390/molecules28114523] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 05/17/2023] [Accepted: 05/17/2023] [Indexed: 06/12/2023] Open
Abstract
Current management for diabetes has stimulated the development of versatile 3D-based hydrogels as in vitro platforms for insulin release and as support for the encapsulation of pancreatic cells and islets of Langerhans. This work aimed to create agarose/fucoidan hydrogels to encapsulate pancreatic cells as a potential biomaterial for diabetes therapeutics. The hydrogels were produced by combining fucoidan (Fu) and agarose (Aga), marine polysaccharides derived from the cell wall of brown and red seaweeds, respectively, and a thermal gelation process. The agarose/fucoidan (AgaFu) blended hydrogels were obtained by dissolving Aga in 3 or 5 wt % Fu aqueous solutions to obtain different proportions (4:10; 5:10, and 7:10 wt). The rheological tests on hydrogels revealed a non-Newtonian and viscoelastic behavior, while the characterization confirmed the presence of the two polymers in the structure of the hydrogels. In addition, the mechanical behavior showed that increasing Aga concentrations resulted in hydrogels with higher Young's modulus. Further, the ability of the developed materials to sustain the viability of human pancreatic cells was assessed by encapsulation of the 1.1B4HP cell line for up to 7 days. The biological assessment of the hydrogels revealed that cultured pancreatic beta cells tended to self-organize and form pseudo-islets during the period studied.
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Affiliation(s)
- Lara L Reys
- 3B's Research Group, I3Bs-Research Institute on Biomaterials, Biodegradables and Biomimetics of University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark-Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Barco, Guimarães, Portugal
- ICVS/3B's-PT Government Associate Laboratory, 4710-057 Braga/Guimarães, Portugal
| | - Simone S Silva
- 3B's Research Group, I3Bs-Research Institute on Biomaterials, Biodegradables and Biomimetics of University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark-Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Barco, Guimarães, Portugal
- ICVS/3B's-PT Government Associate Laboratory, 4710-057 Braga/Guimarães, Portugal
| | - Diana Soares da Costa
- 3B's Research Group, I3Bs-Research Institute on Biomaterials, Biodegradables and Biomimetics of University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark-Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Barco, Guimarães, Portugal
- ICVS/3B's-PT Government Associate Laboratory, 4710-057 Braga/Guimarães, Portugal
| | - Luísa C Rodrigues
- 3B's Research Group, I3Bs-Research Institute on Biomaterials, Biodegradables and Biomimetics of University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark-Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Barco, Guimarães, Portugal
- ICVS/3B's-PT Government Associate Laboratory, 4710-057 Braga/Guimarães, Portugal
| | - Rui L Reis
- 3B's Research Group, I3Bs-Research Institute on Biomaterials, Biodegradables and Biomimetics of University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark-Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Barco, Guimarães, Portugal
- ICVS/3B's-PT Government Associate Laboratory, 4710-057 Braga/Guimarães, Portugal
| | - Tiago H Silva
- 3B's Research Group, I3Bs-Research Institute on Biomaterials, Biodegradables and Biomimetics of University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark-Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017 Barco, Guimarães, Portugal
- ICVS/3B's-PT Government Associate Laboratory, 4710-057 Braga/Guimarães, Portugal
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5
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Wang Z, Xie R, Shi Q, Li Y, Chang J, Yuan J, Gong H, Chen J. Vacuum-assisted tissue embedding for whole-heart imaging. BIOMEDICAL OPTICS EXPRESS 2023; 14:2539-2550. [PMID: 37342702 PMCID: PMC10278630 DOI: 10.1364/boe.488766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 04/25/2023] [Accepted: 04/26/2023] [Indexed: 06/23/2023]
Abstract
The use of combined optical imaging and tissue sectioning has potential for use in visualizing heart-wide fine structures at single-cell resolution. However, existing tissue preparation methods fail to generate ultrathin cavity-containing cardiac tissue slices with minimal deformation. This study developed an efficient vacuum-assisted tissue embedding method to prepare high-filled, agarose-embedded whole-heart tissue. Utilizing optimized vacuum parameters, we achieved 94% filled whole-heart tissue with the thinnest cut slice of 5 µm. We subsequently imaged a whole mouse heart sample using vibratome-integrated fluorescence micro-optical sectioning tomography (fMOST) with a voxel size of 0.32 µm × 0.32 µm × 1 µm. The imaging results indicated that the vacuum-assisted embedding method enabled whole-heart tissue to withstand long-term thin cutting while ensuring that slices were consistent and of high quality.
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Affiliation(s)
- Zhi Wang
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, MoE Key Laboratory for Biomedical Photonics, Huazhong University of Science and Technology, Wuhan, China
- HUST-Suzhou Institute for Brainsmatics, JITRI, Suzhou, China
| | - Ruiheng Xie
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, MoE Key Laboratory for Biomedical Photonics, Huazhong University of Science and Technology, Wuhan, China
| | - Qishuo Shi
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, MoE Key Laboratory for Biomedical Photonics, Huazhong University of Science and Technology, Wuhan, China
| | - Yafeng Li
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, MoE Key Laboratory for Biomedical Photonics, Huazhong University of Science and Technology, Wuhan, China
| | - Jin Chang
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, MoE Key Laboratory for Biomedical Photonics, Huazhong University of Science and Technology, Wuhan, China
| | - Jing Yuan
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, MoE Key Laboratory for Biomedical Photonics, Huazhong University of Science and Technology, Wuhan, China
- HUST-Suzhou Institute for Brainsmatics, JITRI, Suzhou, China
| | - Hui Gong
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, MoE Key Laboratory for Biomedical Photonics, Huazhong University of Science and Technology, Wuhan, China
- HUST-Suzhou Institute for Brainsmatics, JITRI, Suzhou, China
| | - Jianwei Chen
- Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, MoE Key Laboratory for Biomedical Photonics, Huazhong University of Science and Technology, Wuhan, China
- HUST-Suzhou Institute for Brainsmatics, JITRI, Suzhou, China
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6
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Torabiardekani N, Karami F, Khorram M, Zare A, Kamkar M, Zomorodian K, Zareshahrabadi Z. Encapsulation of Zataria multiflora essential oil in polyvinyl alcohol/chitosan/gelatin thermo-responsive hydrogel: Synthesis, physico-chemical properties, and biological investigations. Int J Biol Macromol 2023:125073. [PMID: 37245771 DOI: 10.1016/j.ijbiomac.2023.125073] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 04/25/2023] [Accepted: 05/22/2023] [Indexed: 05/30/2023]
Abstract
Zataria multiflora essential oil is a natural volatile plant product whose therapeutic applications require a delivery platform. Biomaterial-based hydrogels have been extensively used in biomedical applications, and they are promising platforms to encapsulate essential oils. Among different hydrogels, intelligent hydrogels have recently attracted many interests because of their response to environmental stimuli such as temperature. Herein, Zataria multiflora essential oil is encapsulated in a polyvinyl alcohol/chitosan/gelatin hydrogel as a positive thermo-responsive and antifungal platform. According to the optical microscopic image, the encapsulated spherical essential oil droplets reveal a mean size of 1.10 ± 0.64 μm, which are in consistent with the SEM imaging results. Encapsulation efficacy and loading capacity are 98.66 % and 12.98 %, respectively. These results confirm the successful efficient encapsulation of the Zataria multiflora essential oil within the hydrogel. The chemical compositions of the Zataria multiflora essential oil and the fabricated hydrogel are analyzed by gas chromatography-mass spectroscopy (GC-MS) and Fourier transform infrared (FTIR) techniques. It is found that thymol (44.30 %) and γ-terpinene (22.62 %) are the main constituents of the Zataria multiflora essential oil. The produced hydrogel inhibits the metabolic activity of Candida albicans biofilms (~60-80 %), which can be related to the antifungal activity of the essential oil constituents and chitosan. Based on the rheological results, the produced thermo-responsive hydrogel shows a gel-sol viscoelastic transition at a temperature of 24.5 °C. This transition leads to a facile release of the loaded essential oil. The release test depicts that about 30 % of Zataria multiflora essential oil is released during the first 16 min. In addition, 2, 5-diphenyl-2H-tetrazolium bromide (MTT) assay demonstrates that the designed thermo-sensitive formulation is biocompatible with high cell viability (over 96 %). The fabricated hydrogel can be deemed as a potential intelligent drug delivery platform for controlling cutaneous candidiasis due to antifungal effectiveness and less toxicity, which can be a promising alternative to traditional drug delivery systems.
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Affiliation(s)
| | - Forough Karami
- Central Research Laboratory, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran; Chemistry Department, Yasouj University, Yasouj, Iran
| | - Mohammad Khorram
- School of Chemical and Petroleum Engineering, Shiraz University, Shiraz, Iran
| | - Alireza Zare
- Department of Chemical Engineering, Shiraz Branch, Islamic Azad University, Shiraz, Iran
| | - Milad Kamkar
- Department of Chemical Engineering and Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Canada
| | - Kamiar Zomorodian
- Department of Medical Parasitology and Mycology, Shiraz University of Medical Sciences, Shiraz, Iran; Basic Sciences in Infectious Diseases Research Center, Shiraz University of Medical Sciences, Shiraz, Iran.
| | - Zahra Zareshahrabadi
- Basic Sciences in Infectious Diseases Research Center, Shiraz University of Medical Sciences, Shiraz, Iran.
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7
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Jung H, Geonzon LC, Yoon WB, Matsukawa S. Change of network structure in agarose solution during gelation studied by multiple particle tracking and NMR measurements. Food Hydrocoll 2023. [DOI: 10.1016/j.foodhyd.2023.108740] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
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8
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Crespo-Cuevas V, Ferguson VL, Vernerey F. Poroviscoelasto-plasticity of agarose-based hydrogels. SOFT MATTER 2023; 19:790-806. [PMID: 36625244 DOI: 10.1039/d2sm01356h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Agarose gels are excellent candidates for tissue engineering as they are tunable, viscoelastic, and show a pronounced strain-stiffening response. These characteristics make them ideal to create in vitro environments to grow cells and develop tissues. As in many other biopolymers, viscoelasticity and poroelasticity coexist as time-dependent behaviors in agarose gels. While the viscoelastic behavior of these hydrogels has been considered using both phenomenological and continuum models, there remains a lack of connection between the underlying physics and the macroscopic material response. Through a finite element analysis and complimentary experiments, we evaluated the complex time-dependent mechanical response of agarose gels in various conditions. We then conceptualized these gels as a dynamic network where the global dissociation/association rate of intermolecular bonds is described as a combination of a fast rate native to double helices forming between aligned agarose molecules and a slow rate of the agarose molecules present in the clusters. Using the foundation of the transient network theory, we developed a physics-based constitutive model that accurately describes agarose behavior. Integrating experimental results and model prediction, we demonstrated that the fast dissociation/association rate follows a nonlinear force-dependent response, whose exponential evolution agrees with Eyring's model based on the transition state theory. Overall, our results establish a more accurate understanding of the time-dependent mechanics of agarose gels and provide a model that can inform design of a variety of biopolymers with a similar network topology.
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Affiliation(s)
- Victor Crespo-Cuevas
- Department of Mechanical Engineering, University of Colorado Boulder, Boulder, CO, 80309, USA.
| | - Virginia L Ferguson
- Department of Mechanical Engineering, University of Colorado Boulder, Boulder, CO, 80309, USA.
| | - Franck Vernerey
- Department of Mechanical Engineering, University of Colorado Boulder, Boulder, CO, 80309, USA.
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9
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Thermo-responsive behavior and gelation of curdlan alkyl-ethers prepared by homogeneous reaction. Carbohydr Polym 2023; 300:120248. [DOI: 10.1016/j.carbpol.2022.120248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Revised: 09/24/2022] [Accepted: 10/18/2022] [Indexed: 11/11/2022]
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10
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Wenger L, Radtke CP, Gerisch E, Kollmann M, Niemeyer CM, Rabe KS, Hubbuch J. Systematic evaluation of agarose- and agar-based bioinks for extrusion-based bioprinting of enzymatically active hydrogels. Front Bioeng Biotechnol 2022; 10:928878. [PMID: 36479432 PMCID: PMC9720278 DOI: 10.3389/fbioe.2022.928878] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Accepted: 11/07/2022] [Indexed: 10/28/2023] Open
Abstract
Extrusion-based 3D bioprinting enables the production of customized hydrogel structures that can be employed in flow reactors when printing with enzyme-containing inks. The present study compares inks based on either low-melt agarose or agar at different concentrations (3-6%) and loaded with the thermostable enzyme esterase 2 from the thermophilic organism Alicyclobacillus acidocaldarius (AaEst2) with regard to their suitability for the fabrication of such enzymatically active hydrogels. A customized printer setup including a heatable nozzle and a cooled substrate was established to allow for clean and reproducible prints. The inks and printed hydrogel samples were characterized using rheological measurements and compression tests. All inks were found to be sufficiently printable to create lattices without overhangs, but printing quality was strongly enhanced at 4.5% polymer or more. The produced hydrogels were characterized regarding mechanical strength and diffusibility. For both properties, a strong correlation with polymer concentration was observed with highly concentrated hydrogels being more stable and less diffusible. Agar hydrogels were found to be more stable and show higher diffusion rates than comparable agarose hydrogels. Enzyme leaching was identified as a major drawback of agar hydrogels, while hardly any leaching from agarose hydrogels was detected. The poor ability of agar hydrogels to permanently immobilize enzymes indicates their limited suitability for their employment in perfused biocatalytic reactors. Batch-based activity assays showed that the enzymatic activity of agar hydrogels was roughly twice as high as the activity of agarose hydrogels which was mostly attributed to the increased amount of enzyme leaching. Agarose bioinks with at least 4.5% polymer were identified as the most suitable of the investigated inks for the printing of biocatalytic reactors with AaEst2. Drawbacks of these inks are limited mechanical and thermal stability, not allowing the operation of a reactor at the optimum temperature of AaEst2 which is above the melting point of the employed low-melt agarose.
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Affiliation(s)
- Lukas Wenger
- Institute of Engineering in Life Sciences, Section IV: Biomolecular Separation Engineering, Karlsruhe Institute of Technology, Karlsruhe, Germany
| | - Carsten P. Radtke
- Institute of Engineering in Life Sciences, Section IV: Biomolecular Separation Engineering, Karlsruhe Institute of Technology, Karlsruhe, Germany
| | - Eva Gerisch
- Institute of Engineering in Life Sciences, Section IV: Biomolecular Separation Engineering, Karlsruhe Institute of Technology, Karlsruhe, Germany
| | - Max Kollmann
- Institute of Engineering in Life Sciences, Section IV: Biomolecular Separation Engineering, Karlsruhe Institute of Technology, Karlsruhe, Germany
| | - Christof M. Niemeyer
- Institute for Biological Interfaces 1, Karlsruhe Institute of Technology, Karlsruhe, Germany
| | - Kersten S. Rabe
- Institute for Biological Interfaces 1, Karlsruhe Institute of Technology, Karlsruhe, Germany
| | - Jürgen Hubbuch
- Institute of Engineering in Life Sciences, Section IV: Biomolecular Separation Engineering, Karlsruhe Institute of Technology, Karlsruhe, Germany
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11
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Dsouza A, Constantinidou C, Arvanitis TN, Haddleton DM, Charmet J, Hand RA. Multifunctional Composite Hydrogels for Bacterial Capture, Growth/Elimination, and Sensing Applications. ACS APPLIED MATERIALS & INTERFACES 2022; 14:47323-47344. [PMID: 36222596 PMCID: PMC9614723 DOI: 10.1021/acsami.2c08582] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/14/2022] [Accepted: 09/20/2022] [Indexed: 06/16/2023]
Abstract
Hydrogels are cross-linked networks of hydrophilic polymer chains with a three-dimensional structure. Owing to their unique features, the application of hydrogels for bacterial/antibacterial studies and bacterial infection management has grown in importance in recent years. This trend is likely to continue due to the rise in bacterial infections and antimicrobial resistance. By exploiting their physicochemical characteristics and inherent nature, hydrogels have been developed to achieve bacterial capture and detection, bacterial growth or elimination, antibiotic delivery, or bacterial sensing. Traditionally, the development of hydrogels for bacterial/antibacterial studies has focused on achieving a single function such as antibiotic delivery, antibacterial activity, bacterial growth, or bacterial detection. However, recent studies demonstrate the fabrication of multifunctional hydrogels, where a single hydrogel is capable of performing more than one bacterial/antibacterial function, or composite hydrogels consisting of a number of single functionalized hydrogels, which exhibit bacterial/antibacterial function synergistically. In this review, we first highlight the hydrogel features critical for bacterial studies and infection management. Then, we specifically address unique hydrogel properties, their surface/network functionalization, and their mode of action for bacterial capture, adhesion/growth, antibacterial activity, and bacterial sensing, respectively. Finally, we provide insights into different strategies for developing multifunctional hydrogels and how such systems can help tackle, manage, and understand bacterial infections and antimicrobial resistance. We also note that the strategies highlighted in this review can be adapted to other cell types and are therefore likely to find applications beyond the field of microbiology.
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Affiliation(s)
- Andrea Dsouza
- Warwick
Manufacturing Group, The University of Warwick, Coventry, United Kingdom CV4 7AL
| | | | - Theodoros N. Arvanitis
- Institute
of Digital Healthcare, Warwick Manufacturing Group, The University of Warwick, Coventry, United Kingdom CV4 7AL
| | - David M. Haddleton
- Department
of Chemistry, The University of Warwick, Coventry, United Kingdom CV4 7AL
| | - Jérôme Charmet
- Warwick
Manufacturing Group, The University of Warwick, Coventry, United Kingdom CV4 7AL
- Warwick
Medical School, The University of Warwick, Coventry, United Kingdom CV4 7AL
- School
of Engineering—HE-Arc Ingénierie, HES-SO University of Applied Sciences Western Switzerland, 2000 Neuchâtel, Switzerland
| | - Rachel A. Hand
- Department
of Chemistry, The University of Warwick, Coventry, United Kingdom CV4 7AL
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12
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Xiao Q, Ma M, Chen J, Zhang Y, Chen F, Weng H, Xiao A. Preparation of macroporous rigid agarose microspheres by pre-crosslinking with cyclic anhydride. Int J Biol Macromol 2022; 222:41-54. [PMID: 36156340 DOI: 10.1016/j.ijbiomac.2022.09.146] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Revised: 09/04/2022] [Accepted: 09/16/2022] [Indexed: 11/30/2022]
Abstract
In this study, a new method for preparing macroporous rigid agarose microspheres was developed by one-step pre-crosslinking method with cyclic anhydride. Three different cyclic anhydrides, namely, maleic anhydride, succinic anhydride, and glutaric anhydride, were used to pre-crosslink agarose. The reaction temperature and the amount of cyclic anhydride in the pre-crosslinking process were optimized to endow agarose with stronger cross-linking. Under the optimal cross-linking condition, macroporous rigid agarose microspheres with homogeneous particle size were successfully obtained by adjusting emulsification method. Cryo-scanning electron microscopy was used to characterize the morphology of cross-linked agarose gel and microspheres. The addition of cyclic anhydride increased the gel aperture of cross-linked agarose microspheres, thereby making the macropores in the microspheres more dense and enhancing the mass transfer in the particles. Under low pressure, the cross-linked agarose microsphere column can effectively separate model proteins at linear flow rates three times higher than the agarose microsphere column. These results indicate that the developed agarose microspheres are a promising high-speed chromatographic medium.
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Affiliation(s)
- Qiong Xiao
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China; National R&D Center for Red Alga Processing Technology, Xiamen, Fujian Province 361021, China; Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Xiamen, Fujian Province 361021, China; Xiamen Key Laboratory of Marine Functional Food, Xiamen 361021, China
| | - Mingze Ma
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China; National R&D Center for Red Alga Processing Technology, Xiamen, Fujian Province 361021, China; Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Xiamen, Fujian Province 361021, China; Xiamen Key Laboratory of Marine Functional Food, Xiamen 361021, China
| | - Jun Chen
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China; National R&D Center for Red Alga Processing Technology, Xiamen, Fujian Province 361021, China; Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Xiamen, Fujian Province 361021, China; Xiamen Key Laboratory of Marine Functional Food, Xiamen 361021, China
| | - Yonghui Zhang
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China; National R&D Center for Red Alga Processing Technology, Xiamen, Fujian Province 361021, China; Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Xiamen, Fujian Province 361021, China; Xiamen Key Laboratory of Marine Functional Food, Xiamen 361021, China
| | - Fuquan Chen
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China; National R&D Center for Red Alga Processing Technology, Xiamen, Fujian Province 361021, China; Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Xiamen, Fujian Province 361021, China; Xiamen Key Laboratory of Marine Functional Food, Xiamen 361021, China
| | - Huifen Weng
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China; National R&D Center for Red Alga Processing Technology, Xiamen, Fujian Province 361021, China; Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Xiamen, Fujian Province 361021, China; Xiamen Key Laboratory of Marine Functional Food, Xiamen 361021, China
| | - Anfeng Xiao
- College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China; National R&D Center for Red Alga Processing Technology, Xiamen, Fujian Province 361021, China; Fujian Provincial Engineering Technology Research Center of Marine Functional Food, Xiamen, Fujian Province 361021, China; Xiamen Key Laboratory of Marine Functional Food, Xiamen 361021, China.
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13
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Quantification using rheological blending-law analysis and verification with 3D confocal laser scanning microscopy of the phase behaviour in agarose-gelatin co-gels. Food Hydrocoll 2022. [DOI: 10.1016/j.foodhyd.2022.108042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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14
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Dubay R, Urban JN, Darling EM. Single-Cell Microgels for Diagnostics and Therapeutics. ADVANCED FUNCTIONAL MATERIALS 2021; 31:2009946. [PMID: 36329867 PMCID: PMC9629779 DOI: 10.1002/adfm.202009946] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Indexed: 05/14/2023]
Abstract
Cell encapsulation within hydrogel droplets is transforming what is feasible in multiple fields of biomedical science such as tissue engineering and regenerative medicine, in vitro modeling, and cell-based therapies. Recent advances have allowed researchers to miniaturize material encapsulation complexes down to single-cell scales, where each complex, termed a single-cell microgel, contains only one cell surrounded by a hydrogel matrix while remaining <100 μm in size. With this achievement, studies requiring single-cell resolution are now possible, similar to those done using liquid droplet encapsulation. Of particular note, applications involving long-term in vitro cultures, modular bioinks, high-throughput screenings, and formation of 3D cellular microenvironments can be tuned independently to suit the needs of individual cells and experimental goals. In this progress report, an overview of established materials and techniques used to fabricate single-cell microgels, as well as insight into potential alternatives is provided. This focused review is concluded by discussing applications that have already benefited from single-cell microgel technologies, as well as prospective applications on the cusp of achieving important new capabilities.
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Affiliation(s)
- Ryan Dubay
- Center for Biomedical Engineering, Brown University, 175 Meeting St., Providence, RI 02912, USA
- Draper, 555 Technology Sq., Cambridge, MA 02139, USA
| | - Joseph N Urban
- Center for Biomedical Engineering, Brown University, 175 Meeting St., Providence, RI 02912, USA
| | - Eric M Darling
- Department of Molecular Pharmacology, Physiology, and Biotechnology, Center for Biomedical Engineering, School of Engineering, Department of Orthopaedics, Brown University, 175 Meeting St., Providence, RI 02912, USA
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15
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Carvalho DN, Reis RL, Silva TH. Marine origin materials on biomaterials and advanced therapies to cartilage tissue engineering and regenerative medicine. Biomater Sci 2021; 9:6718-6736. [PMID: 34494053 DOI: 10.1039/d1bm00809a] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The body's self-repair capacity is limited, including injuries on articular cartilage zones. Over the past few decades, tissue engineering and regenerative medicine (TERM) has focused its studies on the development of natural biomaterials for clinical applications aiming to overcome this self-therapeutic bottleneck. This review focuses on the development of these biomaterials using compounds and materials from marine sources that are able to be produced in a sustainable way, as an alternative to mammal sources (e.g., collagens) and benefiting from their biological properties, such as biocompatibility, low antigenicity, biodegradability, among others. The structure and composition of the new biomaterials require mimicking the native extracellular matrix (ECM) of articular cartilage tissue. To design an ideal temporary tissue-scaffold, it needs to provide a suitable environment for cell growth (cell attachment, proliferation, and differentiation), towards the regeneration of the damaged tissues. Overall, the purpose of this review is to summarize various marine sources to be used in the development of different tissue-scaffolds with the capability to sustain cells envisaging cartilage tissue engineering, analysing the systems displaying more promising performance, while pointing out current limitations and steps to be given in the near future.
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Affiliation(s)
- Duarte Nuno Carvalho
- 3B's Research Group, I3B's - Research Institute on Biomaterials, Biodegradables and Biomimetics of University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark 4805-017, Barco, Guimarães, Portugal. .,ICVS/3B's - P.T. Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Rui L Reis
- 3B's Research Group, I3B's - Research Institute on Biomaterials, Biodegradables and Biomimetics of University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark 4805-017, Barco, Guimarães, Portugal. .,ICVS/3B's - P.T. Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Tiago H Silva
- 3B's Research Group, I3B's - Research Institute on Biomaterials, Biodegradables and Biomimetics of University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark 4805-017, Barco, Guimarães, Portugal. .,ICVS/3B's - P.T. Government Associate Laboratory, Braga/Guimarães, Portugal
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16
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Barzic AI. Rheology and Structural Properties of Polysaccharides. POLYSACCHARIDES 2021. [DOI: 10.1002/9781119711414.ch17] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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17
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Caine M, Bian S, Tang Y, Garcia P, Henman A, Dreher M, Daly D, Carlisle R, Stride E, Willis SL, Lewis AL. In situ evaluation of spatiotemporal distribution of doxorubicin from Drug-eluting Beads in a tissue mimicking phantom. Eur J Pharm Sci 2021; 160:105772. [PMID: 33621612 DOI: 10.1016/j.ejps.2021.105772] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Revised: 02/15/2021] [Accepted: 02/16/2021] [Indexed: 01/18/2023]
Abstract
Understanding the intra-tumoral distribution of chemotherapeutic drugs is extremely important in predicting therapeutic outcome. Tissue mimicking gel phantoms are useful for studying drug distribution in vitro but quantifying distribution is laborious due to the need to section phantoms over the relevant time course and individually quantify drug elution. In this study we compare a bespoke version of the traditional phantom sectioning approach, with a novel confocal microscopy technique that enables dynamic in situ measurements of drug concentration. Release of doxorubicin from Drug-eluting Embolization Beads (DEBs) was measured in phantoms composed of alginate and agarose over comparable time intervals. Drug release from several different types of bead were measured. The non-radiopaque DC Bead™ generated a higher concentration at the boundary between the beads and the phantom and larger drug penetration distance within the release period, compared with the radiopaque DC Bead LUMI™. This is likely due to the difference of compositional and structural characteristics of the hydrogel beads interacting differently with the loaded drug. Comparison of in vitro results against historical in vivo data show good agreement in terms of drug penetration, when confounding factors such as geometry, elimination and bead chemistry were accounted for. Hence these methods have demonstrated potential for both bead and gel phantom validation, and provide opportunities for optimisation of bead design and embolization protocols through in vitro-in vivo comparison.
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Affiliation(s)
- Marcus Caine
- Boston Scientific, Lakeview, Watchmoor Park, Camberley, GU15 3YL, UK
| | - Shuning Bian
- Oxford Institute of Biomedical Engineering, University of Oxford, OX3 7DQ, UK
| | - Yiqing Tang
- Boston Scientific, Lakeview, Watchmoor Park, Camberley, GU15 3YL, UK.
| | - Pedro Garcia
- Boston Scientific, Lakeview, Watchmoor Park, Camberley, GU15 3YL, UK
| | - Alexander Henman
- Boston Scientific, Lakeview, Watchmoor Park, Camberley, GU15 3YL, UK
| | - Matthew Dreher
- Boston Scientific, 300 Boston Scientific Way, Marlborough, Massachusetts, 01752, United States
| | - Dan Daly
- Lein Applied Diagnostics, Reading Enterprise Centre, University of Reading, Earley Gate, Whiteknights Road, Reading, RG6 6BU, UK
| | - Robert Carlisle
- Oxford Institute of Biomedical Engineering, University of Oxford, OX3 7DQ, UK
| | - Eleanor Stride
- Oxford Institute of Biomedical Engineering, University of Oxford, OX3 7DQ, UK
| | - Sean L Willis
- Boston Scientific, Lakeview, Watchmoor Park, Camberley, GU15 3YL, UK
| | - Andrew L Lewis
- Boston Scientific, Lakeview, Watchmoor Park, Camberley, GU15 3YL, UK.
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18
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Krömmelbein C, Mütze M, Konieczny R, Schönherr N, Griebel J, Gerdes W, Mayr SG, Riedel S. Impact of high-energy electron irradiation on mechanical, structural and chemical properties of agarose hydrogels. Carbohydr Polym 2021; 263:117970. [PMID: 33858571 DOI: 10.1016/j.carbpol.2021.117970] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Revised: 03/16/2021] [Accepted: 03/17/2021] [Indexed: 10/21/2022]
Abstract
Due to their excellent biocompatibility and biodegradability, natural hydrogels are highly demanded biomaterials for biomedical applications such as wound dressing, tissue engineering, drug delivery or three dimensional cell culture. Highly energetic electron irradiation up to 10 MeV is a powerful and fast tool to sterilize and tailor the material's properties. In this study, electron radiation treatment of agarose hydrogels was investigated to evaluate radiation effects on physical, structural and chemical properties. The viscoelastic behavior, surface hydrophilicity and swelling behavior in a range of typical sterilization doses of 0 kGy to 30 kGy was analyzed. The mechanical properties were determined by rheology measurements and decreased by more than 20% compared to the initial moduli. The number average molecular weight between crosslinks was estimated based on rubber elasticity theory to judge on the radiation degradation. In this dose range, the number average molecular weight between crosslinks increased by more than 6%. Chemical structure was investigated by FTIR spectroscopy to evaluate the radiation resistance of agarose hydrogels. With increasing electron dose, an increasing amount of carbonyl containing species was observed. In addition, irradiation was accompanied by formation of gas cavities in the hydrogels. The gas products were specified for CO2, CO and H2O. Based on the radiolytic products, a radiolysis mechanism was proposed. Electron beam treatment under high pressure conditions was found to reduce gas cavity formation in the hydrogels.
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Affiliation(s)
- Catharina Krömmelbein
- Leibniz Institute of Surface Engineering (IOM), Permoserstraße 15, 04318 Leipzig, Germany; Division of Surface Physics, Faculty of Physics and Earth Science, Leipzig University, Linnéstraße 5, 04103 Leipzig, Germany.
| | - Martin Mütze
- Leibniz Institute of Surface Engineering (IOM), Permoserstraße 15, 04318 Leipzig, Germany; Division of Surface Physics, Faculty of Physics and Earth Science, Leipzig University, Linnéstraße 5, 04103 Leipzig, Germany
| | - Robert Konieczny
- Leibniz Institute of Surface Engineering (IOM), Permoserstraße 15, 04318 Leipzig, Germany
| | - Nadja Schönherr
- Leibniz Institute of Surface Engineering (IOM), Permoserstraße 15, 04318 Leipzig, Germany
| | - Jan Griebel
- Leibniz Institute of Surface Engineering (IOM), Permoserstraße 15, 04318 Leipzig, Germany
| | | | - Stefan G Mayr
- Leibniz Institute of Surface Engineering (IOM), Permoserstraße 15, 04318 Leipzig, Germany; Division of Surface Physics, Faculty of Physics and Earth Science, Leipzig University, Linnéstraße 5, 04103 Leipzig, Germany.
| | - Stefanie Riedel
- Leibniz Institute of Surface Engineering (IOM), Permoserstraße 15, 04318 Leipzig, Germany; Division of Surface Physics, Faculty of Physics and Earth Science, Leipzig University, Linnéstraße 5, 04103 Leipzig, Germany; Cell.Copedia GmbH, Bosestraße 4, 04109 Leipzig, Germany.
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19
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Device fabrication on curvilinear two-dimensional surfaces using polymer probes. POLYMER 2021. [DOI: 10.1016/j.polymer.2021.123521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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20
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Graphene-laden hydrogels: A strategy for thermally triggered drug delivery. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 118:111353. [PMID: 33254973 DOI: 10.1016/j.msec.2020.111353] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 07/08/2020] [Accepted: 07/30/2020] [Indexed: 12/23/2022]
Abstract
The synthesis of graphene-based materials has attracted considerable attention in drug delivery strategies. Indeed, the conductivity and mechanical stability of graphene have been investigated for controlled and tunable drug release via electric or mechanical stimuli. However, the design of a thermo-sensitive scaffold using pristine graphene (without distortions related to the oxidation processes) has not been deeply investigated yet, although it may represent a promising approach for several therapeutic treatments. Here, few-layer graphene was used as a nanofiller in a hydrogel system with a thermally tunable drug release profile. In particular, varying the temperature (25 °C, 37 °C and 44 °C), responsive drug releases were noticed and hypothesized depending on the formation and perturbation of π-π interactions involving graphene, the polymeric matrix and the model drug (diclofenac). As a result, these hybrid hydrogels show a potential application as thermally triggered drug release systems in several healthcare scenarios.
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21
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Lima-Sousa R, de Melo-Diogo D, Alves CG, Cabral CS, Miguel SP, Mendonça AG, Correia IJ. Injectable in situ forming thermo-responsive graphene based hydrogels for cancer chemo-photothermal therapy and NIR light-enhanced antibacterial applications. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 117:111294. [DOI: 10.1016/j.msec.2020.111294] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Revised: 07/06/2020] [Accepted: 07/21/2020] [Indexed: 02/01/2023]
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22
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Kopač T, Krajnc M, Ručigaj A. A mathematical model for pH-responsive ionically crosslinked TEMPO nanocellulose hydrogel design in drug delivery systems. Int J Biol Macromol 2020; 168:695-707. [PMID: 33246006 DOI: 10.1016/j.ijbiomac.2020.11.126] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Revised: 10/26/2020] [Accepted: 11/18/2020] [Indexed: 12/25/2022]
Abstract
Ionically crosslinked hydrogels based on TEMPO nanocelullose and alginate were prepared to develop a generalized pH value, temperature and biopolymer concentration dependent mathematical model. The distinctive attention was in the demonstration of hydrogen bonds effects in the mathematical model, prevailing especially in the field of low crosslink densities of TEMPO nanocellulose hydrogel in acid medium. Accordingly, alginate hydrogels were subjected to the research as comparable samples with less significant hydrogel bonds effect. The equation was built upon the determination of the average mesh size in a TEMPO nanocellulose and alginate hydrogel network and studying its changes in different pH release environments. Based on rheological measurements of TEMPO nanocellulose and alginate from the basic and acidic release environment, the mechanism of swelling and shrinkage was thoroughly discussed as well as the influence of substituent groups, ionic interactions and hydrogen bonds in different pH medium were evaluated. Due to the protonation of carboxylic groups, TEMPO nanocellulose and alginate hydrogels shrink in an acid environment. The presented approach will accelerate, improve and reduce the cost of research in the field of controlled release technology with target drug delivery.
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Affiliation(s)
- Tilen Kopač
- University of Ljubljana, Faculty of Chemistry and Chemical Technology, Večna pot 113, SI-1000 Ljubljana, Slovenia
| | - Matjaž Krajnc
- University of Ljubljana, Faculty of Chemistry and Chemical Technology, Večna pot 113, SI-1000 Ljubljana, Slovenia
| | - Aleš Ručigaj
- University of Ljubljana, Faculty of Chemistry and Chemical Technology, Večna pot 113, SI-1000 Ljubljana, Slovenia.
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23
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Nowak BP, Ravoo BJ. Photoresponsive hybrid hydrogel with a dual network of agarose and a self-assembling peptide. SOFT MATTER 2020; 16:7299-7304. [PMID: 32672313 DOI: 10.1039/d0sm00835d] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Responsive hybrid hydrogels composed of a self-assembling low molecular weight gelator and a polymeric network are of particular interest for the development of smart nanomaterials. Key advantages of such hybrid hydrogels are their ease in preparation as well as their unique mechanical properties. Herein we describe a photoresponsive peptide AAP-FGDS, which exhibits excellent photochemical properties and highly reversible changes in the rheological properties. Addition of AAP-FGDS to a covalent, non-responsive agarose network gives rise to a robust hybrid hydrogel with phototunable mechanical properties and shape memory. Upon irradiation with UV light the self-assembled three dimensional structure disaggregates to yield a softer yet self-supporting hydrogel. Irradiation with visible light followed by the reassembly of the peptide allows the fixation of a different shape programmed by mechanical deformation. Upon repeated deactivation of the peptide network the original shape is recovered.
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Affiliation(s)
- Benedikt P Nowak
- Center for Soft Nanoscience and Organic Chemistry Institute, Westfälische Wilhelms-Universität Münster, Busso Peus Straße 10, 48149 Münster, Germany.
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24
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de Queiroz RP, da Hora LF, Aum PTP. Study of agarose aggregate formation through rheological and DLS analyses. Colloid Polym Sci 2020. [DOI: 10.1007/s00396-020-04698-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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25
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Martínez-Sanz M, Ström A, Lopez-Sanchez P, Knutsen SH, Ballance S, Zobel HK, Sokolova A, Gilbert EP, López-Rubio A. Advanced structural characterisation of agar-based hydrogels: Rheological and small angle scattering studies. Carbohydr Polym 2020; 236:115655. [DOI: 10.1016/j.carbpol.2019.115655] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Revised: 11/20/2019] [Accepted: 11/20/2019] [Indexed: 02/06/2023]
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26
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Klučáková M. Agarose Hydrogels Enriched by Humic Acids as the Complexation Agent. Polymers (Basel) 2020; 12:polym12030687. [PMID: 32204449 PMCID: PMC7182926 DOI: 10.3390/polym12030687] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Revised: 03/16/2020] [Accepted: 03/17/2020] [Indexed: 01/27/2023] Open
Abstract
The transport properties of agarose hydrogels enriched by humic acids were studied. Methylene blue, rhodamine 6G and Cu(II) ions were incorporated into hydrogel as diffusion probes, and then their release into water was monitored. Cu(II) ions as well as both the dyes studied in this work have high affinity to humic substances and their interactions strongly affected their diffusion in hydrogels. It was confirmed that humic acids retarded the transport of diffusion probes. Humic acids' enrichment caused the decrease in the values of effective diffusion coefficients due to their complexation with diffusion probes. In general, the diffusion of dyes was more affected by the complexation with humic acids in comparison with Cu(II) ions. The effect of complexation was selective for the particular diffusion probe. The strongest effect was obtained for the diffusion of methylene blue. It was assumed that metal ions interacted preferentially with acidic functional groups. In contrast to Cu(II) ions, dyes can interact with acidic functional groups, and the condensed cyclic structures of the dye probes supported their interactions with the hydrophobic domains of humic substances.
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Affiliation(s)
- Martina Klučáková
- Faculty of Chemistry, Brno University of Technology, Purkyňova 118/464, 612 00 Brno, Czech Republic
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27
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Ding F, Zhong Y, Wu S, Liu X, Zou X, Li H. Synthesis and characterization of quaternized agar in KOH/urea aqueous solution. NEW J CHEM 2020. [DOI: 10.1039/d0nj03412f] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Quaternized agar (QA) is synthesized in KOH/urea aqueous solution and shows low melting and gelling temperatures and antibacterial properties.
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Affiliation(s)
- Fuyuan Ding
- School of Food and Biological Engineering
- Jiangsu University
- Zhenjiang
- China
| | - Yuye Zhong
- School of Printing and Packaging
- Wuhan University
- Wuhan
- China
| | - Shuping Wu
- Research School of Polymeric Materials
- School of Materials Science & Engineering
- Jiangsu University
- Zhenjiang
- China
| | - Xinghai Liu
- School of Printing and Packaging
- Wuhan University
- Wuhan
- China
| | - Xiaobo Zou
- School of Food and Biological Engineering
- Jiangsu University
- Zhenjiang
- China
| | - Houbin Li
- School of Printing and Packaging
- Wuhan University
- Wuhan
- China
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28
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Teixeira AM, Martins P. Mechanical characterisation of an organic phantom candidate for breast tissue. J Biomater Appl 2019; 34:1163-1170. [PMID: 31876237 DOI: 10.1177/0885328219895738] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The aim of this study is to analyse the mechanical properties of agarose, which can be used as a mechanical phantom for breast tissues. In general, tissue mimicking materials may be used to achieve a better understanding of the structure and properties of tissues and organs; this work shares these objectives. The phantom can be used as a tissue surrogate with realistic mechanical behaviour for biomechanical applications. To validate agarose as a suitable mechanical phantom for breast tissues, indentation tests were performed in homogeneous, rectangular agarose blocks. Blocks with different agarose concentrations were moulded and tested. An estimation of the material stiffness was then compared with experimental data on different breast tissues’ types found in literature. The phantom stiffness increased consistently with agarose concentration and stress. The results show that agarose-based mechanical phantoms of stiffer tissues require higher agarose concentrations (0.5% and 0.6%). In contrast, normal tissues can be mimicked with 0.3% and 0.4% of agarose. In addition, it was observed that preconditioning affects the mechanical properties of the gel, as it had already been shown in literature for breast tissues.
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Affiliation(s)
- Ana M Teixeira
- FEUPINEGI, Faculdade de Engenharia da Universidade do Porto, Porto, Portugal
| | - Pedro Martins
- FEUPINEGI, Faculdade de Engenharia da Universidade do Porto, Porto, Portugal
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29
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Saeedi Garakani S, Khanmohammadi M, Atoufi Z, Kamrava SK, Setayeshmehr M, Alizadeh R, Faghihi F, Bagher Z, Davachi SM, Abbaspourrad A. Fabrication of chitosan/agarose scaffolds containing extracellular matrix for tissue engineering applications. Int J Biol Macromol 2019; 143:533-545. [PMID: 31816374 DOI: 10.1016/j.ijbiomac.2019.12.040] [Citation(s) in RCA: 71] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2019] [Revised: 12/02/2019] [Accepted: 12/05/2019] [Indexed: 01/15/2023]
Abstract
One of the most effective approaches for treatment of cartilage involves the use of porous three-dimensional scaffolds, which are useful for improving not only cellular adhesion but also mechanical properties of the treated tissues. In this study, we manufactured a composite scaffold with optimum properties to imitate nasal cartilage attributes. Cartilage extracellular matrix (ECM) was used in order to improve the cellular properties of the scaffolds; while, chitosan and agarose were main materials that are used to boost the mechanical and rheological properties of the scaffolds. Furthermore, we explored the effect of the various weight ratios of chitosan, agarose, and ECM on the mechanical and biomedical properties of the composite scaffolds using the Taguchi method. The resulting composites display a range of advantages, including good mechanical strength, porous morphology, partial crystallinity, high swelling ratio, controlled biodegradability rate, and rheological characteristics. Additionally, we performed the cytotoxicity tests to confirm the improvement of the structure and better cell attachments on the scaffolds. Our findings illustrate that the presence of the ECM in chitosan/agarose structure improves the biomedical characteristics of the final scaffold. In addition, we were able to control the mechanical properties and microstructure of the scaffolds by optimizing the polymers' concentration and their resulting interactions. These results present a novel scaffold with simultaneously enhanced mechanical and cellular attributes comparing to the scaffolds without ECM for nasal cartilage tissue engineering applications.
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Affiliation(s)
- Sadaf Saeedi Garakani
- Skull Base Research Center, The Five Senses Institute, Hazrat Rasoul Akram Hospital, Iran University of Medical Sciences (IUMS), Tehran, Iran
| | - Mehdi Khanmohammadi
- Department of Tissue Engineering and Applied Cell Science, School of Advanced Technologies in Medicine, Tehran University of Medical Science, Tehran, Iran
| | - Zhaleh Atoufi
- School of Chemical Engineering, College of Engineering, University of Tehran, Tehran, Iran
| | - Seyed Kamran Kamrava
- ENT and Head & Neck Research Center and Department, The Five Senses Institute, Hazrat Rasoul Akram Hospital, Iran University of Medical Sciences, Tehran, Iran
| | - Mohsen Setayeshmehr
- Biomaterials, Nanotechnology and Tissue Engineering Group, Department of Advanced Medical Technology, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Rafieh Alizadeh
- ENT and Head & Neck Research Center and Department, The Five Senses Institute, Hazrat Rasoul Akram Hospital, Iran University of Medical Sciences, Tehran, Iran
| | - Faezeh Faghihi
- Cellular and Molecular Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Zohreh Bagher
- ENT and Head & Neck Research Center and Department, The Five Senses Institute, Hazrat Rasoul Akram Hospital, Iran University of Medical Sciences, Tehran, Iran.
| | - Seyed Mohammad Davachi
- Department of Food Science, College of Agriculture and Life Sciences, Cornell University, Ithaca, NY, USA.
| | - Alireza Abbaspourrad
- Department of Food Science, College of Agriculture and Life Sciences, Cornell University, Ithaca, NY, USA
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Mauri E, Rossetti A, Mozetic P, Schiavon C, Sacchetti A, Rainer A, Rossi F. Ester coupling of ibuprofen in hydrogel matrix: A facile one-step strategy for controlled anti-inflammatory drug release. Eur J Pharm Biopharm 2019; 146:143-149. [PMID: 31726217 DOI: 10.1016/j.ejpb.2019.11.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Accepted: 11/07/2019] [Indexed: 11/08/2022]
Abstract
Ibuprofen (IBU) is a non-steroidal anti-inflammatory drug (NSAID) commonly used in the treatment of pain, fever and inflammation. However, the administration of IBU in its free carboxylic acid form is strongly dependent on its limited solubility in aqueous solution. This mandates for an increased drug concentration to reach the therapeutic window, and promotes the alternative use of IBU sodium salt, even if this latter form poses significant constraints in terms of tunable release due to its uncontrolled and rapid diffusion. A potential solution is represented by oral administration through physical encapsulation of ibuprofen in designed carriers, despite this route limits the application of this therapeutic agent. In this work, we propose the covalent tethering of ibuprofen to a hydrogel matrix via esterification reaction. Exploiting the cleavability of the ester bond under physiological conditions, we propose a controlled drug delivery system where the whole drug payload can be released, thus overcoming the questioned aspects of over-dosage and solubility-dependent administration. In particular, we tested the biological activity of cleaved ibuprofen in terms of cyclooxygenase inhibition, reporting that chemical tethering did not alter the efficiency of the NSAID. Moreover, due to the sol-gel transition of the hydrogel matrix, these ibuprofen-functionalized hydrogels could be used as injectable tools in several clinical scenarios, performing a localized drug release and opening advanced avenues for in situ treatments.
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Affiliation(s)
- Emanuele Mauri
- Department of Engineering, Università Campus Bio-Medico di Roma, via Álvaro del Portillo 21, 00128 Rome, Italy; Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, via L. Mancinelli 7, 20131 Milan, Italy
| | - Arianna Rossetti
- Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, via L. Mancinelli 7, 20131 Milan, Italy
| | - Pamela Mozetic
- Center for Translational Medicine, International Clinical Research Center, St. Anne's University Hospital, Pekařská 929/56, 60200 Brno, Czechia
| | - Chiara Schiavon
- Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, via L. Mancinelli 7, 20131 Milan, Italy
| | - Alessandro Sacchetti
- Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, via L. Mancinelli 7, 20131 Milan, Italy
| | - Alberto Rainer
- Department of Engineering, Università Campus Bio-Medico di Roma, via Álvaro del Portillo 21, 00128 Rome, Italy.
| | - Filippo Rossi
- Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, via L. Mancinelli 7, 20131 Milan, Italy.
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Orlacchio R, Zhadobov M, Alekseev SI, Nikolayev D, Sauleau R, Le Page Y, Le Dréan Y. Millimeter-Wave Heating in In Vitro Studies: Effect of Convection in Continuous and Pulse-Modulated Regimes. Bioelectromagnetics 2019; 40:553-568. [PMID: 31579965 DOI: 10.1002/bem.22223] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Accepted: 09/12/2019] [Indexed: 11/09/2022]
Abstract
Shallow penetration of millimeter waves (MMW) and non-uniform illumination in in vitro experiments result in a non-uniform distribution of the specific absorption rate (SAR). These SAR gradients trigger convective currents in liquids affecting transient and steady-state temperature distributions. We analyzed the effect of convection on temperature dynamics during MMW exposure in continuous-wave (CW) and pulsed-wave (PW) amplitude-modulated regimes using micro-thermocouples. Temperature rise kinetics are characterized by the occurrence of a temperature peak that shifts to shorter times as the SAR of the MMW exposure increases and precedes initiation of convection in bulk. Furthermore, we demonstrate that the liquid volume impacts convection. Increasing the volume results in earlier triggering of convection and in a greater cooling rate after the end of the exposure. In PW regimes, convection strongly depends on the pulse duration that affects the heat pulse amplitude and cooling rate. The latter results in a change of the average temperature in PW regime. Bioelectromagnetics. 2019;40:553-568. © 2019 Bioelectromagnetics Society.
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Affiliation(s)
- Rosa Orlacchio
- CNRS, IETR (Institut d'Electronique et de Télécommunication de Rennes)-UMR 6164, University of Rennes, Rennes, France.,CNRS, XLIM, UMR 7252, University of Limoges, Limoges, France
| | - Maxim Zhadobov
- CNRS, IETR (Institut d'Electronique et de Télécommunication de Rennes)-UMR 6164, University of Rennes, Rennes, France
| | - Stanislav I Alekseev
- Institute of Cell Biophysics of Russian Academy of Sciences, Pushchino, Moscow, Russia
| | - Denys Nikolayev
- Microwaves and Antennas Group (MAG), EPFL, Lausanne, Switzerland
| | - Ronan Sauleau
- CNRS, IETR (Institut d'Electronique et de Télécommunication de Rennes)-UMR 6164, University of Rennes, Rennes, France
| | - Yann Le Page
- Inserm, EHESP, IRSET (Institut de Recherche en Santé, Environnement et Travail) UMR_S 1085, University of Rennes, Rennes, France
| | - Yves Le Dréan
- Inserm, EHESP, IRSET (Institut de Recherche en Santé, Environnement et Travail) UMR_S 1085, University of Rennes, Rennes, France
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Torabi S, Li L, Grabau J, Sands M, Berron BJ, Xu R, Trinkle CA. Cassie-Baxter Surfaces for Reversible, Barrier-Free Integration of Microfluidics and 3D Cell Culture. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:10299-10308. [PMID: 31291112 PMCID: PMC6996068 DOI: 10.1021/acs.langmuir.9b01163] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
3D cell culture and microfluidics both represent powerful tools for replicating critical components of the cell microenvironment; however, challenges involved in the integration of the two and compatibility with standard tissue culture protocols still represent a steep barrier to widespread adoption. Here we demonstrate the use of engineered surface roughness in the form of microfluidic channels to integrate 3D cell-laden hydrogels and microfluidic fluid delivery. When a liquid hydrogel precursor solution is pipetted onto a surface containing open microfluidic channels, the solid/liquid/air interface becomes pinned at sharp edges such that the hydrogel forms the "fourth wall" of the channels upon solidification. We designed Cassie-Baxter microfluidic surfaces that leverage this phenomenon, making it possible to have barrier-free diffusion between the channels and the hydrogel; in addition, sealing is robust enough to prevent leakage between the two components during fluid flow, but the sealing can also be reversed to facilitate recovery of the cell/hydrogel material after culture. This method was used to culture MDA-MB-231 cells in collagen, which remained viable and proliferated while receiving media exclusively through the microfluidic channels over the course of several days.
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Affiliation(s)
- Soroosh Torabi
- Mechanical Engineering , University of Kentucky , Lexington , Kentucky 40506 , United States
| | - Linzhang Li
- Pharmacology and Nutritional Sciences , University of Kentucky , Lexington , Kentucky 40536 , United States
- Markey Cancer Center , University of Kentucky , Lexington , Kentucky 40508 , United States
| | - Jonathan Grabau
- Mechanical Engineering , University of Kentucky , Lexington , Kentucky 40506 , United States
| | - Madison Sands
- Pharmacology and Nutritional Sciences , University of Kentucky , Lexington , Kentucky 40536 , United States
- Markey Cancer Center , University of Kentucky , Lexington , Kentucky 40508 , United States
| | - Brad J Berron
- Chemical and Materials Engineering , University of Kentucky , Lexington , Kentucky 40506 , United States
| | - Ren Xu
- Pharmacology and Nutritional Sciences , University of Kentucky , Lexington , Kentucky 40536 , United States
- Markey Cancer Center , University of Kentucky , Lexington , Kentucky 40508 , United States
| | - Christine A Trinkle
- Mechanical Engineering , University of Kentucky , Lexington , Kentucky 40506 , United States
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Zhang H, Zeng H, Priimagi A, Ikkala O. Programmable responsive hydrogels inspired by classical conditioning algorithm. Nat Commun 2019; 10:3267. [PMID: 31332196 PMCID: PMC6646376 DOI: 10.1038/s41467-019-11260-3] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Accepted: 06/26/2019] [Indexed: 01/19/2023] Open
Abstract
Living systems have inspired research on non-biological dynamic materials and systems chemistry to mimic specific complex biological functions. Upon pursuing ever more complex life-inspired non-biological systems, mimicking even the most elementary aspects of learning is a grand challenge. We demonstrate a programmable hydrogel-based model system, whose behaviour is inspired by associative learning, i.e., conditioning, which is among the simplest forms of learning. Algorithmically, associative learning minimally requires responsivity to two different stimuli and a memory element. Herein, nanoparticles form the memory element, where a photoacid-driven pH-change leads to their chain-like assembly with a modified spectral behaviour. On associating selected light irradiation with heating, the gel starts to melt upon the irradiation, originally a neutral stimulus. A logic diagram describes such an evolution of the material response. Coupled chemical reactions drive the system out-of-equilibrium, allowing forgetting and memory recovery. The findings encourage to search non-biological materials towards associative and dynamic properties. Living systems inspired research on systems chemistry to mimic specific complex biological functions, but mimicking even the most elementary aspects of learning is a grand challenge. Here the authors demonstrate a programmable hydrogel-based model system, whose behaviour is inspired by associative learning.
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Zuluaga-Vélez A, Cómbita-Merchán DF, Buitrago-Sierra R, Santa JF, Aguilar-Fernández E, Sepúlveda-Arias JC. Silk fibroin hydrogels from the Colombian silkworm Bombyx mori L: Evaluation of physicochemical properties. PLoS One 2019; 14:e0213303. [PMID: 30830943 PMCID: PMC6398845 DOI: 10.1371/journal.pone.0213303] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Accepted: 02/19/2019] [Indexed: 12/17/2022] Open
Abstract
Hydrogel scaffolds are important materials in tissue engineering, and their characterization is essential to determine potential biomedical applications according to their mechanical and structural behavior. In this work, silk fibroin hydrogels were synthesized by two different methods (vortex and sonication), and agarose hydrogels were also obtained for comparison purposes. Samples were characterized by scanning electron microscopy, infrared analysis, thermo-gravimetrical analysis, confined compression test, and rheological test. The results indicate that nanofibers can be obtained via both silk fibroin and agarose hydrogels. The mechanical tests showed that the Young's modulus is similar to those found in the literature, with the highest value for agarose hydrogels. All the hydrogels showed a shear-thinning behavior. Additionally, the MTT test revealed that silk fibroin hydrogels had low cytotoxicity in THP-1 and HEK-293 cells, whereas the agarose hydrogels showed high toxicity for the THP-1 cell line. The results indicate that silk fibroin hydrogels obtained from a Colombian silkworm hybrid are suitable for the development of scaffolds, with potential applications in tissue engineering.
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Affiliation(s)
- Augusto Zuluaga-Vélez
- Grupo Infección e Inmunidad, Facultad de Ciencias de la Salud, Universidad Tecnológica de Pereira, Pereira, Colombia
| | | | | | - Juan Felipe Santa
- Facultad de Ingenierías, Instituto Tecnológico Metropolitano—ITM, Medellín, Colombia
- Grupo de Tribología y Superficies, Universidad Nacional de Colombia, Sede Medellín, Colombia
| | - Enrique Aguilar-Fernández
- Grupo Infección e Inmunidad, Facultad de Ciencias de la Salud, Universidad Tecnológica de Pereira, Pereira, Colombia
| | - Juan C. Sepúlveda-Arias
- Grupo Infección e Inmunidad, Facultad de Ciencias de la Salud, Universidad Tecnológica de Pereira, Pereira, Colombia
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Towards rational design of porous nanostructured biopolymeric microparticles for biomacromolecules separation: A case study of intraparticle diffusion facilitation and BSA adsorption on agarose microspheres. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018; 93:518-528. [DOI: 10.1016/j.msec.2018.07.080] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Revised: 07/09/2018] [Accepted: 07/30/2018] [Indexed: 12/21/2022]
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Topuz F, Nadernezhad A, Caliskan OS, Menceloglu YZ, Koc B. Nanosilicate embedded agarose hydrogels with improved bioactivity. Carbohydr Polym 2018; 201:105-112. [DOI: 10.1016/j.carbpol.2018.08.032] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Revised: 08/05/2018] [Accepted: 08/08/2018] [Indexed: 11/25/2022]
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37
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Ghanbari Adivi F, Hashemi P, Dadkhah Tehrani A. Agarose-coated Fe3O4@SiO2 magnetic nanoparticles modified with sodium dodecyl sulfate, a new promising sorbent for fast adsorption/desorption of cationic drugs. Polym Bull (Berl) 2018. [DOI: 10.1007/s00289-018-2418-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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38
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Ghanbari Adivi F, Hashemi P. Ultrafine agarose-coated superparamagnetic iron oxide nanoparticles (AC-SPIONs): a promising sorbent for drug delivery applications. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2018. [DOI: 10.1007/s13738-018-1311-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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39
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Kandemir N, Xia Y, Duan P, Yang W, Chen J. Rheological Characterization of Agarose and Poloxamer 407 (P407) Based Hydrogels. ACTA ACUST UNITED AC 2018. [DOI: 10.1557/adv.2018.131] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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40
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Preparation and characterization of maleoylagarose/PNIPAAm graft copolymers and formation of polyelectrolyte complexes with chitosan. Carbohydr Polym 2018; 182:81-91. [DOI: 10.1016/j.carbpol.2017.11.012] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Revised: 09/07/2017] [Accepted: 11/02/2017] [Indexed: 01/20/2023]
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41
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Wang Y, Jiang S, Wang H, Bie H. A mucoadhesive, thermoreversible in situ nasal gel of geniposide for neurodegenerative diseases. PLoS One 2017; 12:e0189478. [PMID: 29240797 PMCID: PMC5730156 DOI: 10.1371/journal.pone.0189478] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2017] [Accepted: 11/27/2017] [Indexed: 01/20/2023] Open
Abstract
Neurodegenerative diseases are becoming prevalent as the population ages. Geniposide could inhibit oxidative stress, reduce apoptosis, protect neuron, and has been used for therapy of the neurodegenerative diseases. The bioavailability of geniposide by nasal route is greater than that by oral administration. However, mucociliary clearance is a rate-limiting factor for nasal route administration. The objective of this study was to develop and evaluate a mucoadhesive, thermoreversible in situ nasal gel of geniposide. The poloxamers (P407, P188) and the hydroxypropyl methylcellulose were used as thermoreversible and mucoadhesive polymers, respectively. Borneol was used as a permeation enhancer. The hydrogel was prepared with the cold method and optimized by the response surface methodology-central composite design. Gelation temperature, pH, clarity, gel strength, mucoadhesive strength, in vitro and ex vivo release kinetics of formulations were evaluated. The optimized amounts of poloxamer407 (P407), poloxamer188 (P188) and hydroxypropyl methylcellulose were determined to be 19.4-20.5%, 1.1-4.0% and 0.3-0.6% respectively. The second-order polynomial equation in terms of actual factors indicated a satisfactory correlation between the independent variables and the response (R2 = 0.9760). An ANOVA of the empirical second-order polynomial model indicated the model was significant (P<0.01). P407, P188, P407×P188, P4072 and P1882 were significant model terms. The effects of P407 on gelation temperature were greater than those of other independent variables. The pH values of all the formulations were found to be within 6.3-6.5 which was in the nasal physiological pH range 4.5-6.5. The drug content, gel strength, mucoadhesive strength of the optimized formulations were 97-101%, 25-50 sec and 4000-6000 dyn/cm2 respectively. The in vitro release kinetics of cumulative release of geniposide was fitted to the zero-order model. The ex vivo cumulative release kinetics of geniposide was fitted to the Weibull model. This study concludes that the release of geniposide is controlled by gel corrosion, and that the permeation of geniposide is time-dependent. The more residence time, mucoadhesive, thermoreversible in situ nasal gel of geniposide for neurodegenerative diseases is of compliance and potential application.
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Affiliation(s)
- Yingting Wang
- Jining No.1 People's Hospital, Jining, Shandong Province, China
| | - Shulong Jiang
- Jining No.1 People's Hospital, Jining, Shandong Province, China
- * E-mail:
| | - Hongli Wang
- Jining No.1 People's Hospital, Jining, Shandong Province, China
| | - Haiyan Bie
- Jining No.1 People's Hospital, Jining, Shandong Province, China
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42
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Shoaib T, Carmichael A, Corman RE, Shen Y, Nguyen TH, Ewoldt RH, Espinosa-Marzal RM. Self-adaptive hydrogels to mineralization. SOFT MATTER 2017; 13:5469-5480. [PMID: 28812774 DOI: 10.1039/c7sm01058c] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Mineralized biological tissues, whose behavior can range from rigid to compliant, are an essential component of vertebrates and invertebrates. Little is known about how the behavior of mineralized yet compliant tissues can be tuned by the degree of mineralization. In this work, a synthesis route to tune the structure and mechanical response of agarose gels via ionic crosslinking and mineralization has been developed. A combination of experimental techniques demonstrates that crosslinking via cooperative hydrogen bonding in agarose gels is disturbed by calcium ions, but they promote ionic crosslinking that modifies the agarose network. Further, it is shown that the rearrangement of the hydrogel network helps to accommodate precipitated minerals into the network -in other words, the hydrogel self-adapts to the precipitated mineral- while maintaining the viscoelastic behavior of the hydrogel, despite the reinforcement caused by mineralization. This work not only provides a synthesis route to design biologically inspired soft composites, but also helps to understand the change of properties that biomineralization can cause to biological tissues, organisms and biofilms.
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Affiliation(s)
- Tooba Shoaib
- Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.
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43
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Prendergast ME, Solorzano RD, Cabrera D. Bioinks for biofabrication: current state and future perspectives. ACTA ACUST UNITED AC 2017. [DOI: 10.2217/3dp-2016-0002] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Recent progress in 3D printing technologies is leading a revolution in cell culture methods. These systems rely heavily on bioinks, the raw cells and biomaterials used to create these 3D cultures. These formulations, ranging from cell suspensions to hard acellular thermoplastics, must function with 3D systems and offer biocompatible environments that mimic in vivo tissue characteristics. Although much progress has been made for the production of increasingly complex reproducible 3D tissues, a full biofabrication platform with both improved technology and superior bioinks must be developed. Here, important properties for these materials are examined; recent advances in bioinks are summarized; and finally, future considerations for 3D biofabrication are discussed.
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Affiliation(s)
| | | | - Danny Cabrera
- BioBots, Inc., 3711 Market Street, Philadelphia, PA 19104, USA
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44
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Arrangement at the nanoscale: Effect on magnetic particle hyperthermia. Sci Rep 2016; 6:37934. [PMID: 27897195 PMCID: PMC5126575 DOI: 10.1038/srep37934] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2016] [Accepted: 11/02/2016] [Indexed: 01/01/2023] Open
Abstract
In this work, we present the arrangement of Fe3O4 magnetic nanoparticles into 3D linear chains and its effect on magnetic particle hyperthermia efficiency. The alignment has been performed under a 40 mT magnetic field in an agarose gel matrix. Two different sizes of magnetite nanoparticles, 10 and 40 nm, have been examined, exhibiting room temperature superparamagnetic and ferromagnetic behavior, in terms of DC magnetic field, respectively. The chain formation is experimentally visualized by scanning electron microscopy images. A molecular Dynamics anisotropic diffusion model that outlines the role of intrinsic particle properties and inter-particle distances on dipolar interactions has been used to simulate the chain formation process. The anisotropic character of the aligned samples is also reflected to ferromagnetic resonance and static magnetometry measurements. Compared to the non-aligned samples, magnetically aligned ones present enhanced heating efficiency increasing specific loss power value by a factor of two. Dipolar interactions are responsible for the chain formation of controllable density and thickness inducing shape anisotropy, which in turn enhances magnetic particle hyperthermia efficiency.
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Abstract
Molecular diffusive membranes or materials are important for biological applications in microfluidic systems. Hydrogels are typical materials that offer several advantages, such as free diffusion for small molecules, biocompatibility with most cells, temperature sensitivity, relatively low cost, and ease of production. With the development of microfluidic applications, hydrogels can be integrated into microfluidic systems by soft lithography, flow-solid processes or UV cure methods. Due to their special properties, hydrogels are widely used as fluid control modules, biochemical reaction modules or biological application modules in different applications. Although hydrogels have been used in microfluidic systems for more than ten years, many hydrogels' properties and integrated techniques have not been carefully elaborated. Here, we systematically review the physical properties of hydrogels, general methods for gel-microfluidics integration and applications of this field. Advanced topics and the outlook of hydrogel fabrication and applications are also discussed. We hope this review can help researchers choose suitable methods for their applications using hydrogels.
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Affiliation(s)
- Xuanqi Zhang
- Center for Quantitative Biology, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, China.
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46
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Homogeneous tosylation of agarose as an approach toward novel functional polysaccharide materials. Carbohydr Polym 2015; 127:236-45. [DOI: 10.1016/j.carbpol.2015.03.025] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2014] [Revised: 03/09/2015] [Accepted: 03/11/2015] [Indexed: 11/19/2022]
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47
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Wang CW, Perez MJ, Helmke BP, Viola F, Lawrence MB. Integration of acoustic radiation force and optical imaging for blood plasma clot stiffness measurement. PLoS One 2015; 10:e0128799. [PMID: 26042775 PMCID: PMC4456080 DOI: 10.1371/journal.pone.0128799] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2014] [Accepted: 04/30/2015] [Indexed: 01/22/2023] Open
Abstract
Despite the life-preserving function blood clotting serves in the body, inadequate or excessive blood clot stiffness has been associated with life-threatening diseases such as stroke, hemorrhage, and heart attack. The relationship between blood clot stiffness and vascular diseases underscores the importance of quantifying the magnitude and kinetics of blood's transformation from a fluid to a viscoelastic solid. To measure blood plasma clot stiffness, we have developed a method that uses ultrasound acoustic radiation force (ARF) to induce micron-scaled displacements (1-500 μm) on microbeads suspended in blood plasma. The displacements were detected by optical microscopy and took place within a micro-liter sized clot region formed within a larger volume (2 mL sample) to minimize container surface effects. Modulation of the ultrasound generated acoustic radiation force allowed stiffness measurements to be made in blood plasma from before its gel point to the stage where it was a fully developed viscoelastic solid. A 0.5 wt % agarose hydrogel was 9.8-fold stiffer than the plasma (platelet-rich) clot at 1 h post-kaolin stimulus. The acoustic radiation force microbead method was sensitive to the presence of platelets and strength of coagulation stimulus. Platelet depletion reduced clot stiffness 6.9 fold relative to platelet rich plasma. The sensitivity of acoustic radiation force based stiffness assessment may allow for studying platelet regulation of both incipient and mature clot mechanical properties.
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Affiliation(s)
- Caroline W. Wang
- Department of Biomedical Engineering, School of Engineering and Applied Science and School of Medicine, University of Virginia Health System, Charlottesville, Virginia, United States of America
| | - Matthew J. Perez
- Department of Biomedical Engineering, School of Engineering and Applied Science and School of Medicine, University of Virginia Health System, Charlottesville, Virginia, United States of America
| | - Brian P. Helmke
- Department of Biomedical Engineering, School of Engineering and Applied Science and School of Medicine, University of Virginia Health System, Charlottesville, Virginia, United States of America
| | - Francesco Viola
- HemoSonics, LLC, Charlottesville, Virginia, United States of America
| | - Michael B. Lawrence
- Department of Biomedical Engineering, School of Engineering and Applied Science and School of Medicine, University of Virginia Health System, Charlottesville, Virginia, United States of America
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48
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Espeso DR, Carpio A, Einarsson B. Differential growth of wrinkled biofilms. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2015; 91:022710. [PMID: 25768534 DOI: 10.1103/physreve.91.022710] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2014] [Indexed: 06/04/2023]
Abstract
Biofilms are antibiotic-resistant bacterial aggregates that grow on moist surfaces and can trigger hospital-acquired infections. They provide a classical example in biology where the dynamics of cellular communities may be observed and studied. Gene expression regulates cell division and differentiation, which affect the biofilm architecture. Mechanical and chemical processes shape the resulting structure. We gain insight into the interplay between cellular and mechanical processes during biofilm development on air-agar interfaces by means of a hybrid model. Cellular behavior is governed by stochastic rules informed by a cascade of concentration fields for nutrients, waste, and autoinducers. Cellular differentiation and death alter the structure and the mechanical properties of the biofilm, which is deformed according to Föppl-Von Kármán equations informed by cellular processes and the interaction with the substratum. Stiffness gradients due to growth and swelling produce wrinkle branching. We are able to reproduce wrinkled structures often formed by biofilms on air-agar interfaces, as well as spatial distributions of differentiated cells commonly observed with B. subtilis.
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Affiliation(s)
- D R Espeso
- Centro Nacional de Biotecnología, CSIC, Madrid 28049, Spain
| | - A Carpio
- Departamento de Matematica Aplicada, Universidad Complutense, Madrid 28040, Spain
| | - B Einarsson
- Center for Complex and Nonlinear Science, UC Santa Barbara, California 93106, USA
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Rossow T, Seiffert S. Supramolecular Polymer Networks: Preparation, Properties, and Potential. SUPRAMOLECULAR POLYMER NETWORKS AND GELS 2015. [DOI: 10.1007/978-3-319-15404-6_1] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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50
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Chau M, Sriskandha SE, Thérien-Aubin H, Kumacheva E. Supramolecular Nanofibrillar Polymer Hydrogels. SUPRAMOLECULAR POLYMER NETWORKS AND GELS 2015. [DOI: 10.1007/978-3-319-15404-6_5] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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