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Nejati S, Mongeau L. In Vitro Investigation of Vocal Fold Cellular Response to Variations in Hydrogel Porosity and Elasticity. ACS Biomater Sci Eng 2024; 10:3909-3922. [PMID: 38783819 DOI: 10.1021/acsbiomaterials.4c00197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2024]
Abstract
Tissue regeneration is intricately influenced by the dynamic interplay between the physical attributes of tissue engineering scaffolds and the resulting biological responses. A tunable microporous hydrogel system was engineered using gelatin methacryloyl (GelMA) and polyethylene glycol diacrylate (PEGDA), with polyethylene glycol (PEG) serving as a porogen. Through systematic variation of PEGDA molecular weights, hydrogels with varying mechanical and architectural properties were obtained. The objective of the present study was to elucidate the impact of substrate mechanics and architecture on the immunological and reparative activities of vocal fold tissues. Mechanical characterization of the hydrogels was performed using tensile strength measurements and rheometry. Their morphological properties were investigated using scanning electron microscopy (SEM) and confocal microscopy. A series of biological assays were conducted. Cellular morphology, differentiation, and collagen synthesis of human vocal fold fibroblasts (hVFFs) were evaluated using immunostaining. Fibroblast proliferation was studied using the WST-1 assay, and cell migration was investigated via the Boyden chamber assay. Macrophage polarization and secretions were also examined using immunostaining and ELISA. The results revealed that increasing the molecular weight of PEGDA from 700 Da to 10,000 Da resulted in decreased hydrogel stiffness, from 62.6 to 8.8 kPa, and increased pore dimensions from approximately 64.9 to 137.4 μm. Biological evaluations revealed that hydrogels with a higher stiffness promoted fibroblast proliferation and spreading, albeit with an increased propensity for fibrosis, as indicated by a surge in myofibroblast differentiation and collagen synthesis. In contrast, hydrogels with greater molecular weights had a softer matrix with expanded pores, enhancing cellular migration and promoting an M2 macrophage phenotype conducive to tissue healing. The findings show that the hydrogels formulated with a PEGDA molecular weight of 6000 Da are best among the hydrogels considered for vocal fold repair. The microporous hydrogels could be tuned to serve in other tissue engineering applications.
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Affiliation(s)
- Sara Nejati
- Department of Mechanical Engineering, McGill University, Montreal H3A 0C3, Canada
| | - Luc Mongeau
- Department of Mechanical Engineering, McGill University, Montreal H3A 0C3, Canada
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2
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Yu Y, Wang C, Fu Q, Wan Y, Yu A. Multi-crosslinked hydrogel built with hyaluronic acid-tyramine, thiolated glycol chitosan and copper-doped bioglass nanoparticles for expediting wound healing. Carbohydr Polym 2024; 327:121635. [PMID: 38171654 DOI: 10.1016/j.carbpol.2023.121635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2023] [Revised: 11/17/2023] [Accepted: 11/22/2023] [Indexed: 01/05/2024]
Abstract
The migration of fibroblasts and endothelial cells is a critical determinant of wound-healing outcomes for skin injuries. Here, hyaluronic acid-tyramine (HAT) and thiolated glycol chitosan (TGC) conjugates were combined with copper-doped bioglass (ACuBG) nanoparticles to build a novel type of multi-crosslinked hydrogel for stimulating the migration of cells, and thus, expediting wound healing. The optimally devised HAT/TGC/ACuBG gels had markedly improved strength and stiffness compared to the gels built from either HAT or TGC while showing sufficient elasticity, which contributes to stimulating the migration of fibroblasts. The sustainable release of silicon and copper ions from the gels was found to jointly induce the migration of human umbilical vein endothelial cells. The results based on mouse full-thickness skin defects demonstrated that they were able to fully restore the skin defects with formation of complete appendages within two weeks, suggesting their promising potency for use in expediting wound healing.
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Affiliation(s)
- Yifeng Yu
- Department of Orthopedics Trauma and Microsurgery, Zhongnan Hospital, Wuhan University, Wuhan, 430071, PR China
| | - Congcong Wang
- College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, 430074, PR China
| | - Qiaoqin Fu
- College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, 430074, PR China
| | - Ying Wan
- College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, 430074, PR China.
| | - Aixi Yu
- Department of Orthopedics Trauma and Microsurgery, Zhongnan Hospital, Wuhan University, Wuhan, 430071, PR China.
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3
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Shen H, Zhang C, Meng Y, Qiao Y, Ma Y, Chen J, Wang X, Pan L. Biomimetic Hydrogel Containing Copper Sulfide Nanoparticles and Deferoxamine for Photothermal Therapy of Infected Diabetic Wounds. Adv Healthc Mater 2024; 13:e2303000. [PMID: 38063809 DOI: 10.1002/adhm.202303000] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Revised: 11/26/2023] [Indexed: 03/28/2024]
Abstract
Inducing cell migration from the edges to the center of a wound, promoting angiogenesis, and controlling bacterial infection are very important for diabetic wound healing. Incorporating growth factors and antibiotics into hydrogels for wound dressing is considered a potential strategy to meet these requirements. However, some present drawbacks greatly slow down their development toward application, such as the short half-life and high price of growth factors, low antibiotic efficiency against drug-resistant bacteria, insufficient ability of hydrogels to promote cell migration, etc. Deferoxamine (DFO) can upregulate the expression of HIF-1α, thus stimulating the secretion of angiogenesis-related endogenous growth factors. Copper sulfide (CuS) nanoparticles possess excellent antibacterial performance combined with photothermal therapy (PTT). Herein, DFO and CuS nanoparticles are incorporated into a biomimetic hydrogel, which mimics the structure and function of the extracellular matrix (ECM), abbreviated as DFO/CuS-ECMgel. This biomimetic hydrogel is expected to be able to promote cell adhesion and migration, be degraded by cell-secreted matrix metalloproteinases (MMPs), and then release DFO and CuS nanoparticles at the wound site to exert their therapeutic effects. As a result, the three crucial requirements for diabetic wound healing, "beneficial for cell adhesion and migration, promoting angiogenesis, effectively killing drug-resistant bacteria," can be achieved simultaneously.
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Affiliation(s)
- Haijun Shen
- Department of Preventive Medicine and Public Health Laboratory Science, School of Medicine, Jiangsu University, Zhenjiang, Jiangsu, 212013, China
| | - Chun Zhang
- Department of Preventive Medicine and Public Health Laboratory Science, School of Medicine, Jiangsu University, Zhenjiang, Jiangsu, 212013, China
| | - Ye Meng
- Department of Preventive Medicine and Public Health Laboratory Science, School of Medicine, Jiangsu University, Zhenjiang, Jiangsu, 212013, China
| | - Yi Qiao
- Department of Preventive Medicine and Public Health Laboratory Science, School of Medicine, Jiangsu University, Zhenjiang, Jiangsu, 212013, China
| | - Yane Ma
- Department of Preventive Medicine and Public Health Laboratory Science, School of Medicine, Jiangsu University, Zhenjiang, Jiangsu, 212013, China
| | - Jialing Chen
- Department of Preventive Medicine and Public Health Laboratory Science, School of Medicine, Jiangsu University, Zhenjiang, Jiangsu, 212013, China
| | - Xiaona Wang
- Department of Internal Medicine of Jiangsu University Hospital Workers, The Affiliated Hospital of Jiangsu University, Zhenjiang, Jiangsu, 212013, China
| | - Lei Pan
- Department of Breast Surgery, The Affiliated People's Hospital of Jiangsu University, Zhenjiang, Jiangsu, 212002, China
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Nejati S, Mongeau L. Injectable, pore-forming, self-healing, and adhesive hyaluronan hydrogels for soft tissue engineering applications. Sci Rep 2023; 13:14303. [PMID: 37652951 PMCID: PMC10471737 DOI: 10.1038/s41598-023-41468-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Accepted: 08/27/2023] [Indexed: 09/02/2023] Open
Abstract
Most existing injectable hydrogels are non-porous, thereby lacking a microporous structure to promote cell ingrowth. Also, most hydrogels do not effectively adhere to the host tissue. The present study describes an injectable double network hydrogel formed by combining two hyaluronic acid (HA) derivatives, namely dopamine grafted HA (DAHA) and methacrylated HA (HAMA). These constituents instantly form a physically crosslinked network through Fe3+-dopamine coordination, and confer fast gelation, pore formation, and self-healing properties to the hydrogel. Photocroslinked upon UV exposure, HAMA forms a chemically crosslinked network, thereby improving mechanical and degradation properties. The adhesive properties of this hydrogel are attributed to the presence of dopamine groups, inspired by mussel creatures. Proper modification of HA chains was confirmed by NMR spectroscopy. The physical, mechanical, rheological, and biological properties of the new hydrogels were quantified in wet laboratory conditions. The results revealed that the DAHA/HAMA hydrogel rapidly forms a self-healing microporous adhesive scaffold with a 26.9 µm pore size, 29.4 kPa compressive modulus, and 12.8 kPa adhesion strength in under 6 s. These findings suggest that the new hydrogel is a promising candidate for in situ repair of soft tissues, particularly mechanically dynamic ones such as the vocal folds, cartilage, and dermis.
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Affiliation(s)
- Sara Nejati
- Department of Mechanical Engineering, McGill University, Montreal, Canada
| | - Luc Mongeau
- Department of Mechanical Engineering, McGill University, Montreal, Canada.
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Yousefi-Mashouf H, Bailly L, Orgéas L, Henrich Bernardoni N. Mechanics of gelatin-based hydrogels during finite strain tension, compression and shear. Front Bioeng Biotechnol 2023; 10:1094197. [PMID: 36714620 PMCID: PMC9877534 DOI: 10.3389/fbioe.2022.1094197] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Accepted: 12/26/2022] [Indexed: 01/13/2023] Open
Abstract
Introduction: Among the biopolymers used to make hydrogels, gelatin is very attractive due to its biocompatibility, biodegradability and versatile physico-chemical properties. A proper and complete characterization of the mechanical behavior of these hydrogels is critical to evaluate the relevance of one formulation over another for a targeted application, and to optimise their processing route accordingly. Methods: In this work, we manufactured neat gelatin and gelatin covalently cross-linked with glutaraldehyde at various concentrations, yielding to hydrogels with tunable mechanical properties that we characterized under finite strain, cyclic tension, compression and shear loadings. Results and Discussion: The role of both the chemical formulation and the kinematical path on the mechanical performances of the gels is highlighted. As an opening towards biomedical applications, the properties of the gels are confronted to those of native soft tissues particularly complicated to restore, the human vocal folds. A specific cross-linked hydrogel is selected to mimic vocal-fold fibrous tissues.
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Affiliation(s)
- Hamid Yousefi-Mashouf
- University Grenoble Alpes, Centre National de la Recherche Scientifique (CNRS), Grenoble INP, 3SR, Grenoble, France,University Grenoble Alpes, Centre National de la Recherche Scientifique (CNRS), Grenoble INP, GIPSA-lab, Grenoble, France
| | - Lucie Bailly
- University Grenoble Alpes, Centre National de la Recherche Scientifique (CNRS), Grenoble INP, 3SR, Grenoble, France,*Correspondence: Lucie Bailly,
| | - Laurent Orgéas
- University Grenoble Alpes, Centre National de la Recherche Scientifique (CNRS), Grenoble INP, 3SR, Grenoble, France
| | - Nathalie Henrich Bernardoni
- University Grenoble Alpes, Centre National de la Recherche Scientifique (CNRS), Grenoble INP, GIPSA-lab, Grenoble, France
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Zuo Y, Yi L, Lu S. Dermal fibroblast from superficial layers of pig skin exhibits more proliferative capacity than that from deep layers. J Tissue Viability 2021; 31:278-285. [PMID: 34895969 DOI: 10.1016/j.jtv.2021.12.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2021] [Revised: 11/21/2021] [Accepted: 12/01/2021] [Indexed: 11/19/2022]
Abstract
OBJECTIVE To further examine the feasibility of using pigs as an animal model for the study of dermal fibroblast heterogeneity and to explore the proliferative capacity of dermal fibroblasts from different layers of pig skin in vitro and in vivo. MATERIAL AND METHODS Cultured superficial and deep dermal fibroblasts were subjected to cell growth assay, cell cycle analysis, immunocytochemical staining and western blotting for proliferating cell nuclear antigens. Moreover, skin samples autografted with superficial/deep dermal fibroblasts were subjected to immunohistochemical staining and western blotting for proliferating cell nuclear antigen. RESULTS The cell growth assay showed that the growth curve of the superficial dermal fibroblast was progressively higher than that of the deep layer. The cell cycle analysis showed that the (G2+S) percentage of the superficial dermal fibroblasts was significantly higher than that of the deep layer fibroblasts. The immunocytochemical staining and western blotting showed that the expression of proliferating cell nuclear antigen in the cultured superficial dermal fibroblast was significantly higher than that of the deep layer cells. The immunohistochemical staining showed that the positive rate of proliferating cell nuclear antigen in the skin samples autografted with the superficial dermal fibroblast was significantly higher than that of the deep layer. CONCLUSIONS This study has demonstrated that similar to human dermal fibroblasts, dermal fibroblasts from different layers of pig skin exhibit distinct proliferative capacity, which increases the feasibility of using pigs as an animal model for future studies on the heterogeneity of dermal fibroblasts.
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Affiliation(s)
- Yanhai Zuo
- Department of Orthopedics, SiJing Hospital of SongJiang District, Shanghai, China; Wound Healing Center, Ruijin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.
| | - Lei Yi
- Department of Burn, Ruijin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.
| | - Shuliang Lu
- Wound Healing Center, Ruijin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.
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Hasselmann S, Hahn L, Lorson T, Schätzlein E, Sébastien I, Beudert M, Lühmann T, Neubauer JC, Sextl G, Luxenhofer R, Heinrich D. Freeform direct laser writing of versatile topological 3D scaffolds enabled by intrinsic support hydrogel. MATERIALS HORIZONS 2021; 8:3334-3344. [PMID: 34617095 DOI: 10.1039/d1mh00925g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
In this study, a novel approach to create arbitrarily shaped 3D hydrogel objects is presented, wherein freeform two-photon polymerization (2PP) is enabled by the combination of a photosensitive hydrogel and an intrinsic support matrix. This way, topologies without physical contact such as a highly porous 3D network of concatenated rings were realized, which are impossible to manufacture with most current 3D printing technologies. Micro-Raman and nanoindentation measurements show the possibility to control water uptake and hence tailor the Young's modulus of the structures via the light dosage, proving the versatility of the concept regarding many scaffold characteristics that makes it well suited for cell specific cell culture as demonstrated by cultivation of human induced pluripotent stem cell derived cardiomyocytes.
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Affiliation(s)
- Sebastian Hasselmann
- Fraunhofer Project Center for Stem Cell Process Engineering Neunerplatz 2, Würzburg 97082, Germany
| | - Lukas Hahn
- Functional Polymer Materials, Chair for Advanced Materials Synthesis, Institute for Functional Materials and Biofabrication, Department of Chemistry and Pharmacy, University of Würzburg, Röntgenring 11, 97070, Germany
| | - Thomas Lorson
- Functional Polymer Materials, Chair for Advanced Materials Synthesis, Institute for Functional Materials and Biofabrication, Department of Chemistry and Pharmacy, University of Würzburg, Röntgenring 11, 97070, Germany
| | - Eva Schätzlein
- East Bavarian Technical University of Applied Sciences, Prüfeninger Str. 58, Regensburg 93049, Germany
| | - Isabelle Sébastien
- Fraunhofer Institute for Biomedical Engineering, Fraunhofer Project Center for Stem Cell Process Engineering, Neunerplatz 2, Würzburg 97082, Germany
| | - Matthias Beudert
- Institute of Pharmacy and Food Chemistry, University of Würzburg, Am Hubland, Würzburg 97074, Germany
| | - Tessa Lühmann
- Institute of Pharmacy and Food Chemistry, University of Würzburg, Am Hubland, Würzburg 97074, Germany
| | - Julia C Neubauer
- Fraunhofer Institute for Biomedical Engineering, Fraunhofer Project Center for Stem Cell Process Engineering, Neunerplatz 2, Würzburg 97082, Germany
| | - Gerhard Sextl
- Fraunhofer Institute for Silicate Research ISC, Neunerplatz 2, Würzburg 97082, Germany.
| | - Robert Luxenhofer
- Functional Polymer Materials, Chair for Advanced Materials Synthesis, Institute for Functional Materials and Biofabrication, Department of Chemistry and Pharmacy, University of Würzburg, Röntgenring 11, 97070, Germany
- Soft Matter Chemistry, Department of Chemistry and Helsinki Institute of Sustainability Science, Faculty of Science University of Helsinki, Helsinki 00014, Finland.
| | - Doris Heinrich
- Fraunhofer Institute for Silicate Research ISC, Neunerplatz 2, Würzburg 97082, Germany.
- Institute for Bioprocessing and Analytical Measurement Techniques, Rosenhof, Heilbad Heiligenstadt 37308, Germany
- Faculty for Mathematics and Natural Sciences, Ilmenau University of Technology, Ilmenau, Germany
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8
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Mu R, Zhang Y, Yan L, Liao Z, Yang Y, Su H, Dong L, Wang C. A "Bridge-Building" Glycan Scaffold Mimicking Microbial Invasion for In Situ Endothelialization. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2103490. [PMID: 34476850 DOI: 10.1002/adma.202103490] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2021] [Revised: 07/21/2021] [Indexed: 06/13/2023]
Abstract
The globally high prevalence of peripheral artery diseases poses a pressing need for biomaterials grafts to rebuild vasculature. When implanted, they should promote endothelial cells (ECs) adhesion both profoundly and selectively-but the latter expectation remains unfulfilled. Here, this work is inspired by fungi that invade blood vessels via the "bridge" of galectins that, secreted by ECs, can simultaneously bind carbohydrates on fungal surface and integrin receptors on ECs. A glucomannan decanoate (GMDE) substrate mimicking fungal carbohydrates that highly and preferentially supports ECs adhesion while rejecting several other cell types is designed. Electrospun GMDE scaffolds efficiently sequester endogenous galectin-1-which bridges ECs to the scaffolds as it functions in fungal invasions-and promote blood perfusion in a murine limb ischemic model. Meanwhile, the application of GMDE requires no exogenous pro-angiogenic agents and causes no organ toxicity or adverse inflammation in mice, highlighting its high safety of potential translation. This glycan material, uniquely mimicking a microbial action and harnessing a secreted protein as a "bridge," represents an effective, safe, and different strategy for ischemic vascular therapy.
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Affiliation(s)
- Ruoyu Mu
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau SAR, China
| | - Yuhan Zhang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau SAR, China
| | - Lingli Yan
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau SAR, China
| | - Zhencheng Liao
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau SAR, China
| | - Yushun Yang
- State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, 210023, China
| | - Huanxing Su
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau SAR, China
| | - Lei Dong
- State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, 210023, China
| | - Chunming Wang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau SAR, China
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Hameed P, Manivasagam G. An overview of bio-actuation in collagen hydrogels: a mechanobiological phenomenon. Biophys Rev 2021; 13:387-403. [PMID: 34178172 PMCID: PMC8214648 DOI: 10.1007/s12551-021-00804-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2021] [Accepted: 05/04/2021] [Indexed: 12/26/2022] Open
Abstract
Due to their congruity with the native extracellular matrix and their ability to assist in soft tissue repair, hydrogels have been touted as a matrix mimicking biomaterial. Hydrogels are one of the prevalent scaffolds used for 3D cell culture. They can exhibit actuation in response to various stimuli like a magnetic field, electric field, mechanical force, temperature, or pH. In 3D cell culture, the traction exerted by cells on hydrogel can induce non-periodic mechanobiological movements (shrinking or folding) called 'bio-actuation'. Interestingly, this hydrogel 'tropism' phenomenon in 3D cell cultures can be exploited to devise hydrogel-cell-based actuators for tissue engineering. This review briefs about the discrepancies in 2D vs. 3D cell culturing on hydrogels and discusses on different types of cell migration occurring inside the hydrogel matrix. It substantiates the role of mechanical stimuli (such as stiffness) exhibited by the collagen-based hydrogel used for 3D cell culture and its influence in governing the lineage commitment of stem cells. Lastly, the review also audits the cytoskeleton proteins present in cells responsible for influencing the actuation of collagen hydrogel and also elaborates on the cellular signaling pathways responsible for actuation of collagen hydrogels.
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Affiliation(s)
- Pearlin Hameed
- Centre for Biomaterials Cellular and Molecular Theranostics, Vellore Institute of Technology, Vellore, 632014 India
| | - Geetha Manivasagam
- Centre for Biomaterials Cellular and Molecular Theranostics, Vellore Institute of Technology, Vellore, 632014 India
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10
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Coburn PT, Herbay AC, Berrini M, Li-Jessen NYK. An in vitro assessment of the response of THP-1 macrophages to varying stiffness of a glycol-chitosan hydrogel for vocal fold tissue engineering applications. J Biomed Mater Res A 2020; 109:1337-1352. [PMID: 33112473 DOI: 10.1002/jbm.a.37125] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Revised: 10/16/2020] [Accepted: 10/23/2020] [Indexed: 01/07/2023]
Abstract
The physical properties of a biomaterial play an essential role in regulating immune and reparative activities within the host tissue. This study aimed to evaluate the immunological impact of material stiffness of a glycol-chitosan hydrogel designed for vocal fold tissue engineering. Hydrogel stiffness was varied via the concentration of glyoxal cross-linker applied. Hydrogel mechanical properties were characterized through atomic force microscopy and shear plate rheometry. Using a transwell setup, macrophages were co-cultured with human vocal fold fibroblasts that were embedded within the hydrogel. Macrophage viability and cytokine secretion were evaluated at 3, 24, and 72 hr of culture. Flow cytometry was applied to evaluate macrophage cell surface markers after 72 hr of cell culture. Results indicated that increasing hydrogel stiffness was associated with increased anti-inflammatory activity compared to relevant controls. In addition, increased anti-inflammatory activity was observed in hydrogel co-cultures. This study highlighted the importance of hydrogel stiffness from an immunological viewpoint when designing novel vocal fold hydrogels.
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Affiliation(s)
| | | | - Mattia Berrini
- School of Communication Sciences and Disorders, McGill University, Montreal, Canada
| | - Nicole Y K Li-Jessen
- School of Communication Sciences and Disorders, McGill University, Montreal, Canada.,Department of Biomedical Engineering, McGill University, Montreal, Canada.,Department of Otolaryngology - Head and Neck Surgery, McGill University, Montreal, Canada
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11
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Zhang Y, Hong G, Zhang Y, Sasaki K, Wu H. Minimally invasive procedures for deficient interdental papillae: A review. J ESTHET RESTOR DENT 2020; 32:463-471. [PMID: 32519508 DOI: 10.1111/jerd.12608] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Revised: 04/11/2020] [Accepted: 05/15/2020] [Indexed: 10/24/2022]
Abstract
OBJECTIVE Deficient interdental papillae cause a series of problems, including food impaction, phonetic difficulties, and esthetic concerns. The purpose of this article is to provide valid clinical recommendations for clinicians to address these problems in a predictable and less invasive way. OVERVIEW Numerous treatments are available for interdental papillae reconstruction, but most of them involve surgery and yield unpredictable outcomes. Minimally invasive treatments have the advantages of being effective, predictable, and involving only slight injury as compared to surgical treatments. We included 66 studies obtained after searching for relevant papers in PubMed and Web of Science. The etiology and classification of deficient interdental papillae are explained and minimally invasive procedures for deficient interdental papillae reconstruction are summarized. CONCLUSIONS Minimally invasive procedures are promising ways to reconstruct deficient interdental papillae, and have the advantages of slight pain and rapid recovery. It should be noticed that some of the minimally invasive treatments still require further long-term observation to confirm their efficacy. CLINICAL SIGNIFICANCE Familiarity with etiology and classification of deficient interdental papillae can help clinicians to choose the appropriate minimally invasive approach as well as help with case collection to enhance esthetics status in patients with deficient interdental papillae.
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Affiliation(s)
- Yiding Zhang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hosepital of Stomatology, Sichuan University, Chengdu, Sichuan, P.R. China.,Division for Globalization Initiative, Liaison Center for Innovative Dentistry, Graduate School of Dentistry, Tohoku University, Sendai, Japan
| | - Guang Hong
- Division for Globalization Initiative, Liaison Center for Innovative Dentistry, Graduate School of Dentistry, Tohoku University, Sendai, Japan
| | - Yifan Zhang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hosepital of Stomatology, Sichuan University, Chengdu, Sichuan, P.R. China.,Division of Advanced Prosthetic Dentistry, Graduate School of Dentistry, Tohoku University, Sendai, Japan
| | - Keiichi Sasaki
- Division of Advanced Prosthetic Dentistry, Graduate School of Dentistry, Tohoku University, Sendai, Japan
| | - Hongkun Wu
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hosepital of Stomatology, Sichuan University, Chengdu, Sichuan, P.R. China
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12
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Ravanbakhsh H, Bao G, Mongeau L. Carbon nanotubes promote cell migration in hydrogels. Sci Rep 2020; 10:2543. [PMID: 32054957 PMCID: PMC7018775 DOI: 10.1038/s41598-020-59463-9] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Accepted: 01/24/2020] [Indexed: 12/15/2022] Open
Abstract
Injectable hydrogels are increasingly used for in situ tissue regeneration and wound healing. Ideally, an injectable implant should promote the recruitment of cells from the surrounding native tissue and allow cells to migrate freely as they generate a new extracellular matrix network. Nanocomposite hydrogels such as carbon nanotube (CNT)-loaded hydrogels have been hypothesized to promote cell recruitment and cell migration relative to unloaded ones. To investigate this, CNT-glycol chitosan hydrogels were synthesized and studied. Chemoattractant-induced cell migration was studied using a modified Boyden Chamber experiment. Migrated cells were counted using flow cytometry. Cell adhesion was inferred from the morphology of the cells via an image segmentation method. Cell migration and recruitment results confirmed that small concentrations of CNT significantly increase cell migration in hydrogels, thereby accelerating tissue regeneration and wound healing in situations where there is insufficient migration in the unloaded matrix.
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Affiliation(s)
- Hossein Ravanbakhsh
- Department of Mechanical Engineering, McGill University, Montreal, QC, H3A0C3, Canada
| | - Guangyu Bao
- Department of Mechanical Engineering, McGill University, Montreal, QC, H3A0C3, Canada
| | - Luc Mongeau
- Department of Mechanical Engineering, McGill University, Montreal, QC, H3A0C3, Canada.
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13
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Ravanbakhsh H, Bao G, Latifi N, Mongeau LG. Carbon nanotube composite hydrogels for vocal fold tissue engineering: Biocompatibility, rheology, and porosity. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 103:109861. [PMID: 31349421 DOI: 10.1016/j.msec.2019.109861] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2018] [Revised: 06/01/2019] [Accepted: 06/03/2019] [Indexed: 01/28/2023]
Abstract
Porous composite hydrogels were prepared using glycol chitosan as the matrix, glyoxal as the chemical crosslinker, and carbon nanotubes (CNTs) as the fibers. Both carboxylic and hydroxylic functionalized CNTs were used. The homogeneity of CNTs dispersion was evaluated using scanning electron microscopy. Human vocal fold fibroblasts were cultured and encapsulated in the composite hydrogels with different CNT concentrations to quantify cell viability. Rheological tests were performed to determine the gelation time and the storage modulus as a function of CNT concentration. The gelation time tended to decrease for low concentrations and increase at higher concentrations, reaching a local minimum value. The storage modulus obeyed different trends depending on the functional group. The porosity of the hydrogels was found to increase by 120% when higher concentrations of carboxylic CNTs were used. A high porosity may promote cell adhesion, migration, and recruitment from the surrounding native tissue, which will be investigated in a future work aiming at applying this injectable biomaterial for vocal fold tissue regeneration.
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Affiliation(s)
- Hossein Ravanbakhsh
- Department of Mechanical Engineering, McGill University, Montreal, QC H3A 0C3, Canada
| | - Guangyu Bao
- Department of Mechanical Engineering, McGill University, Montreal, QC H3A 0C3, Canada
| | - Neda Latifi
- Department of Mechanical Engineering, McGill University, Montreal, QC H3A 0C3, Canada
| | - Luc G Mongeau
- Department of Mechanical Engineering, McGill University, Montreal, QC H3A 0C3, Canada.
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Nguyen NT, Milani AH, Jennings J, Adlam DJ, Freemont AJ, Hoyland JA, Saunders BR. Highly compressive and stretchable poly(ethylene glycol) based hydrogels synthesised using pH-responsive nanogels without free-radical chemistry. NANOSCALE 2019; 11:7921-7930. [PMID: 30964497 DOI: 10.1039/c9nr01535c] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Poly(ethylene glycol) (PEG) based hydrogels are amongst the most studied synthetic hydrogels. However, reports on PEG-based hydrogels with high mechanical strength are limited. Herein, a class of novel, well-defined PEG-based nanocomposite hydrogels with tunable mechanical strength are synthesised via ring-opening reactions of diglycidyl ethers with carboxylate ions. The pH responsive crosslinked polyacid nanogels (NG) in the dispersed phase act as high functionality crosslinkers which covalently bond to the poly(ethylene glycol) diglycidyl ethers (PEGDGE) as the continuous matrix. A series of NG-x-PEG-y-z gels are prepared where x, y and z are concentrations of NGs, PEGDGE and the PEGDGE molecular weight, respectively. The hydrogel compositions and nano-structural homogeneity of the NGs have strong impact on the enhancement of mechanical properties which enables property tuning. Based on this design, a highly compressive PEG-based nanocomposite hydrogel (NG-13-PEG-20-6000) exhibits a compressive stress of 24.2 MPa, compressive fracture strain greater than 98% and a fracture energy density as high as 1.88 MJ m-3. The tensile fracture strain is 230%. This is amongst one of the most compressive PEG-based hydrogels reported to-date. Our chemically crosslinked gels are resilient and show highly recoverable dissipative energy. The cytotoxicity test shows that human nucleus pulposus (NP) cells remained viable after 8 days of culture time. The overall results highlight their potential for applications as replacements for intervertebral discs or articular cartilages.
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Affiliation(s)
- Nam T Nguyen
- School of Materials, University of Manchester, Manchester, M13 9PL, UK.
| | - Amir H Milani
- School of Materials, University of Manchester, Manchester, M13 9PL, UK.
| | - James Jennings
- Department of Chemistry, University of Sheffield, Brook Hill, Sheffield, South Yorkshire S3 7HF, UK
| | - Daman J Adlam
- Division of Cell Matrix Biology and Regenerative Medicine, Faculty of Biology, Medicine and Health, University of Manchester, Oxford Road, Manchester, M13 9PT, UK
| | - Anthony J Freemont
- Division of Cell Matrix Biology and Regenerative Medicine, Faculty of Biology, Medicine and Health, University of Manchester, Oxford Road, Manchester, M13 9PT, UK
| | - Judith A Hoyland
- Division of Cell Matrix Biology and Regenerative Medicine, Faculty of Biology, Medicine and Health, University of Manchester, Oxford Road, Manchester, M13 9PT, UK and NIHR Manchester Biomedical Research Centre, Manchester University NHS foundation Trust, Manchester Academic Health Science Centre, M13 9WL, UK
| | - Brian R Saunders
- School of Materials, University of Manchester, Manchester, M13 9PL, UK.
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Afewerki S, Sheikhi A, Kannan S, Ahadian S, Khademhosseini A. Gelatin-polysaccharide composite scaffolds for 3D cell culture and tissue engineering: Towards natural therapeutics. Bioeng Transl Med 2019; 4:96-115. [PMID: 30680322 PMCID: PMC6336672 DOI: 10.1002/btm2.10124] [Citation(s) in RCA: 195] [Impact Index Per Article: 39.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Revised: 11/23/2018] [Accepted: 11/26/2018] [Indexed: 12/12/2022] Open
Abstract
Gelatin is a promising material as scaffold with therapeutic and regenerative characteristics due to its chemical similarities to the extracellular matrix (ECM) in the native tissues, biocompatibility, biodegradability, low antigenicity, cost-effectiveness, abundance, and accessible functional groups that allow facile chemical modifications with other biomaterials or biomolecules. Despite the advantages of gelatin, poor mechanical properties, sensitivity to enzymatic degradation, high viscosity, and reduced solubility in concentrated aqueous media have limited its applications and encouraged the development of gelatin-based composite hydrogels. The drawbacks of gelatin may be surmounted by synergistically combining it with a wide range of polysaccharides. The addition of polysaccharides to gelatin is advantageous in mimicking the ECM, which largely contains proteoglycans or glycoproteins. Moreover, gelatin-polysaccharide biomaterials benefit from mechanical resilience, high stability, low thermal expansion, improved hydrophilicity, biocompatibility, antimicrobial and anti-inflammatory properties, and wound healing potential. Here, we discuss how combining gelatin and polysaccharides provides a promising approach for developing superior therapeutic biomaterials. We review gelatin-polysaccharides scaffolds and their applications in cell culture and tissue engineering, providing an outlook for the future of this family of biomaterials as advanced natural therapeutics.
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Affiliation(s)
- Samson Afewerki
- Biomaterials Innovation Research Center, Division of Biomedical Engineering, Dept. of MedicineBrigham and Women's Hospital, Harvard Medical SchoolCambridgeMA 02142
- Harvard‐MIT Division of Health Sciences and TechnologyMassachusetts Institute of TechnologyCambridgeMA 02139
| | - Amir Sheikhi
- Biomaterials Innovation Research Center, Division of Biomedical Engineering, Dept. of MedicineBrigham and Women's Hospital, Harvard Medical SchoolCambridgeMA 02142
- Harvard‐MIT Division of Health Sciences and TechnologyMassachusetts Institute of TechnologyCambridgeMA 02139
- Center for Minimally Invasive Therapeutics (C‐MIT)University of California‐Los AngelesLos AngelesCA 90095
- California NanoSystems Institute (CNSI)University of California‐Los AngelesLos AngelesCA 90095
- Dept. of BioengineeringUniversity of California‐Los AngelesLos AngelesCA 90095
| | - Soundarapandian Kannan
- Biomaterials Innovation Research Center, Division of Biomedical Engineering, Dept. of MedicineBrigham and Women's Hospital, Harvard Medical SchoolCambridgeMA 02142
- Harvard‐MIT Division of Health Sciences and TechnologyMassachusetts Institute of TechnologyCambridgeMA 02139
- Nanomedicine Division, Dept. of ZoologyPeriyar UniversitySalemTamil NaduIndia
| | - Samad Ahadian
- Center for Minimally Invasive Therapeutics (C‐MIT)University of California‐Los AngelesLos AngelesCA 90095
- California NanoSystems Institute (CNSI)University of California‐Los AngelesLos AngelesCA 90095
- Dept. of BioengineeringUniversity of California‐Los AngelesLos AngelesCA 90095
| | - Ali Khademhosseini
- Biomaterials Innovation Research Center, Division of Biomedical Engineering, Dept. of MedicineBrigham and Women's Hospital, Harvard Medical SchoolCambridgeMA 02142
- Harvard‐MIT Division of Health Sciences and TechnologyMassachusetts Institute of TechnologyCambridgeMA 02139
- Center for Minimally Invasive Therapeutics (C‐MIT)University of California‐Los AngelesLos AngelesCA 90095
- California NanoSystems Institute (CNSI)University of California‐Los AngelesLos AngelesCA 90095
- Dept. of BioengineeringUniversity of California‐Los AngelesLos AngelesCA 90095
- Dept. of Radiological Sciences, David Geffen School of MedicineUniversity of California‐Los AngelesLos AngelesCA 90095
- Dept. of Chemical and Biomolecular EngineeringUniversity of California‐Los AngelesLos AngelesCA 90095
- Dept. of Bioindustrial Technologies, College of Animal Bioscience and TechnologyKonkuk UniversitySeoulRepublic of Korea
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17
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Pöttler M, Fliedner A, Schreiber E, Janko C, Friedrich RP, Bohr C, Döllinger M, Alexiou C, Dürr S. Impact of Superparamagnetic Iron Oxide Nanoparticles on Vocal Fold Fibroblasts: Cell Behavior and Cellular Iron Kinetics. NANOSCALE RESEARCH LETTERS 2017; 12:284. [PMID: 28431461 PMCID: PMC5398974 DOI: 10.1186/s11671-017-2045-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2017] [Accepted: 04/04/2017] [Indexed: 05/10/2023]
Abstract
PURPOSE The voice is the most important instrument of communication. Tissue defects in the vocal fold (VF) area lead to serious reduction in quality of life, but thus far, no satisfactory VF implant exists. Therefore, we aim to establish a functional VF implant in a rabbit model by magnetic tissue engineering (MTE) using superparamagnetic iron oxide nanoparticles (SPION). Hence, iron quantification over time as well as cell behavior studies upon SPION treatment are of great importance. METHODS Rabbit VF fibroblasts (VFF) were treated with different concentrations of SPIONs (20, 40, and 80 μg/cm2), and iron content was examined for up to 40 days using microwave plasma-atom emission spectroscopy. The effects of SPION treatment on VFF (adhesion, spreading, and migration), which are important for the formation of 3D structures, were tested. RESULTS Cellular SPION quantification revealed that there was no residual iron remaining in VFFs after 40 days. SPIONs had a dose-dependent effect on cell adhesion, with good tolerability observed up to 20 μg/cm2. Migration and spreading were not significantly influenced by SPION treatment up to 80 μg/cm2. DISCUSSION AND CONCLUSION To develop 3D structures, cell behavior should not be affected by SPION uptake. After 40 days, cells were free of iron as a result of metabolism or rarefication during cell division. Cell functions including adhesion, spreading, and migration were proven to be intact in a dose-dependent manner after SPION treatment, suggesting a safe usage of MTE for voice rehabilitation. Our results thus constitute a solid basis for a successful transfer of this technique into 3D constructs, in order to provide an individual and personalized human VF implant in the future.
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Affiliation(s)
- Marina Pöttler
- Department of Otorhinolaryngology, Head and Neck Surgery, Section of Experimental Oncology and Nanomedicine, Else Kröner Fresenius Stiftung-Professorship, University Hospital Erlangen, Erlangen, Germany
- Department of Otorhinolaryngology, Head and Neck Surgery, Section of Experimental Oncology and Nanomedicine (SEON), University Hospital Erlangen, Glückstraße 10a, 91054 Erlangen, Germany
| | - Anna Fliedner
- Department of Otorhinolaryngology, Head and Neck Surgery, Section of Experimental Oncology and Nanomedicine, Else Kröner Fresenius Stiftung-Professorship, University Hospital Erlangen, Erlangen, Germany
| | - Eveline Schreiber
- Department of Otorhinolaryngology, Head and Neck Surgery, Section of Experimental Oncology and Nanomedicine, Else Kröner Fresenius Stiftung-Professorship, University Hospital Erlangen, Erlangen, Germany
| | - Christina Janko
- Department of Otorhinolaryngology, Head and Neck Surgery, Section of Experimental Oncology and Nanomedicine, Else Kröner Fresenius Stiftung-Professorship, University Hospital Erlangen, Erlangen, Germany
| | - Ralf Philipp Friedrich
- Department of Otorhinolaryngology, Head and Neck Surgery, Section of Experimental Oncology and Nanomedicine, Else Kröner Fresenius Stiftung-Professorship, University Hospital Erlangen, Erlangen, Germany
| | - Christopher Bohr
- Department of Otorhinolaryngology, Head and Neck Surgery, Division of Phoniatrics and Pediatric Audiology, University Hospital Erlangen, Erlangen, Germany
| | - Michael Döllinger
- Department of Otorhinolaryngology, Head and Neck Surgery, Division of Phoniatrics and Pediatric Audiology, University Hospital Erlangen, Erlangen, Germany
| | - Christoph Alexiou
- Department of Otorhinolaryngology, Head and Neck Surgery, Section of Experimental Oncology and Nanomedicine, Else Kröner Fresenius Stiftung-Professorship, University Hospital Erlangen, Erlangen, Germany
| | - Stephan Dürr
- Department of Otorhinolaryngology, Head and Neck Surgery, Section of Experimental Oncology and Nanomedicine, Else Kröner Fresenius Stiftung-Professorship, University Hospital Erlangen, Erlangen, Germany
- Department of Otorhinolaryngology, Head and Neck Surgery, Division of Phoniatrics and Pediatric Audiology, University Hospital Erlangen, Erlangen, Germany
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18
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Mora-Boza A, Puertas-Bartolomé M, Vázquez-Lasa B, San Román J, Pérez-Caballer A, Olmeda-Lozano M. Contribution of bioactive hyaluronic acid and gelatin to regenerative medicine. Methodologies of gels preparation and advanced applications. Eur Polym J 2017. [DOI: 10.1016/j.eurpolymj.2017.07.039] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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19
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Zuo Y, Lu S. Dermis, acellular dermal matrix, and fibroblasts from different layers of pig skin exhibit different profibrotic characteristics: evidence from in vivo study. Oncotarget 2017; 8:23613-23627. [PMID: 28423561 PMCID: PMC5410331 DOI: 10.18632/oncotarget.15389] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2016] [Accepted: 01/11/2017] [Indexed: 12/19/2022] Open
Abstract
To explore the profibrotic characteristics of the autografted dermis, acellular dermal matrix, and dermal fibroblasts from superficial/deep layers of pig skin, 93 wounds were established on the dorsa of 7 pigs. 72 wounds autografted with the superficial/deep dermis and acellular dermal matrix served as the superficial/deep dermis and acellular dermal matrix group, respectively, and were sampled at 2, 4, and 8 weeks post-wounding. 21 wounds autografted with/without superficial/deep dermal fibroblasts served as the superficial/deep dermal fibroblast group and the control group, respectively, and were sampled at 2 weeks post-wounding. The hematoxylin and eosin staining showed that the wounded skin thicknesses in the deep dermis group (superficial acellular dermal matrix group) were significantly greater than those in the superficial dermis group (deep acellular dermal matrix group) at each time point, the thickness of the cutting plane in the deep dermal fibroblast group was significantly greater than that in the superficial dermal fibroblast group and the control group. The western blots showed that the α-smooth muscle actin expression in the deep dermis group (superficial acellular dermal matrix group) was significantly greater than that in the superficial dermis group (deep acellular dermal matrix group) at each time point. In summary, the deep dermis and dermal fibroblasts exhibited more profibrotic characteristics than the superficial ones, on the contrary, the deep acellular dermal matrix exhibited less profibrotic characteristics than the superficial one.
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Affiliation(s)
- Yanhai Zuo
- Shanghai Burns Institute, Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Shuliang Lu
- Shanghai Burns Institute, Rui Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
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20
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Caldwell AS, Campbell GT, Shekiro KMT, Anseth KS. Clickable Microgel Scaffolds as Platforms for 3D Cell Encapsulation. Adv Healthc Mater 2017; 6. [PMID: 28485127 DOI: 10.1002/adhm.201700254] [Citation(s) in RCA: 66] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2017] [Revised: 04/11/2017] [Indexed: 01/20/2023]
Abstract
While microporous scaffolds are increasingly used for regenerative medicine and tissue repair applications, the most common techniques to fabricate these scaffolds use templating or top-down fabrication approaches. Cytocompatible bottom-up assembly methods afford the opportunity to assemble microporous systems in the presence of cells and create complex polymer-cell composite systems in situ. Here, microgel building blocks with clickable surface groups are synthesized for the bottom-up fabrication of porous cell-laden scaffolds. The facile nature of assembly allows for human mesenchymal stem cells to be incorporated throughout the porous scaffold. Particles are designed with mean diameters of ≈10 and 100 µm, and assembled to create varied microenvironments. The resulting pore sizes and their distribution significantly alter cell morphology and cytoskeletal formation. This microgel-based system provides numerous tunable properties that can be used to control multiple aspects of cellular growth and development, as well as providing the ability to recapitulate various biological interfaces.
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Affiliation(s)
- Alexander S. Caldwell
- Department of Chemical and Biological Engineering and the BioFrontiers Institute; University of Colorado Boulder; Jennie Smoly Caruthers Biotechnology Building; 3415 Colorado Ave Boulder CO 80303 USA
| | - Gavin T. Campbell
- Department of Chemical and Biological Engineering and the BioFrontiers Institute; University of Colorado Boulder; Jennie Smoly Caruthers Biotechnology Building; 3415 Colorado Ave Boulder CO 80303 USA
| | - Kelly M. T. Shekiro
- Department of Chemical and Biological Engineering and the BioFrontiers Institute; University of Colorado Boulder; Jennie Smoly Caruthers Biotechnology Building; 3415 Colorado Ave Boulder CO 80303 USA
| | - Kristi S. Anseth
- Department of Chemical and Biological Engineering and the BioFrontiers Institute; University of Colorado Boulder; Jennie Smoly Caruthers Biotechnology Building; 3415 Colorado Ave Boulder CO 80303 USA
- Howard Hughes Medical Institute; University of Colorado Boulder; Jennie Smoly Caruthers Biotechnology Building; 3415 Colorado Ave Boulder CO 80303 USA
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21
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Zanna N, Focaroli S, Merlettini A, Gentilucci L, Teti G, Falconi M, Tomasini C. Thixotropic Peptide-Based Physical Hydrogels Applied to Three-Dimensional Cell Culture. ACS OMEGA 2017; 2:2374-2381. [PMID: 30023662 PMCID: PMC6044849 DOI: 10.1021/acsomega.7b00322] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2017] [Accepted: 04/26/2017] [Indexed: 05/24/2023]
Abstract
Pseudopeptides containing the d-Oxd or the d-pGlu [Oxd = (4R,5S)-4-methyl-5-carboxyl-oxazolidin-2-one, pGlu = pyroglutamic acid] moiety and selected amino acids were used as low-molecular-weight gelators to prepare strong and thixotropic hydrogels at physiological pH. The addition of calcium chloride to the gelator solutions induces the formation of insoluble salts that get organized in fibers at a pH close to the physiological one. Physical characterization of hydrogels was carried out by morphologic evaluation and rheological measurements and demonstrated that the analyzed hydrogels are thixotropic, as they have the capability to recover their gel-like behavior. As these hydrogels are easily injectable and may be used for regenerative medicine, they were biologically assessed by cell seeding and viability tests. Human gingival fibroblasts were embedded in 2% hydrogels; all of the hydrogels allow the growth of encapsulated cells with a very good viability. The gelator toxicity may be correlated with their tendency to self-assemble and is totally absent when the hydrogel is formed.
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Affiliation(s)
- Nicola Zanna
- Dipartimento
di Chimica Ciamician, Alma Mater Studiorum
Università di Bologna, Via Selmi, 2, 40126 Bologna, Italy
| | - Stefano Focaroli
- Dipartimento
di Scienze Biomediche e Neuromotorie, Alma
Mater Studiorum Università di Bologna, Via Ugo Foscolo, 7, 40123 Bologna, Italy
| | - Andrea Merlettini
- Dipartimento
di Chimica Ciamician, Alma Mater Studiorum
Università di Bologna, Via Selmi, 2, 40126 Bologna, Italy
| | - Luca Gentilucci
- Dipartimento
di Chimica Ciamician, Alma Mater Studiorum
Università di Bologna, Via Selmi, 2, 40126 Bologna, Italy
| | - Gabriella Teti
- Dipartimento
di Scienze Biomediche e Neuromotorie, Alma
Mater Studiorum Università di Bologna, Via Ugo Foscolo, 7, 40123 Bologna, Italy
| | - Mirella Falconi
- Dipartimento
di Scienze Biomediche e Neuromotorie, Alma
Mater Studiorum Università di Bologna, Via Ugo Foscolo, 7, 40123 Bologna, Italy
| | - Claudia Tomasini
- Dipartimento
di Chimica Ciamician, Alma Mater Studiorum
Università di Bologna, Via Selmi, 2, 40126 Bologna, Italy
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Walimbe T, Panitch A, Sivasankar PM. A Review of Hyaluronic Acid and Hyaluronic Acid-based Hydrogels for Vocal Fold Tissue Engineering. J Voice 2017; 31:416-423. [PMID: 28262503 DOI: 10.1016/j.jvoice.2016.11.014] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Revised: 11/11/2016] [Accepted: 11/15/2016] [Indexed: 11/30/2022]
Abstract
Vocal fold scarring is a common cause of dysphonia. Current treatments involving vocal fold augmentation do not yield satisfactory outcomes in the long term. Tissue engineering and regenerative medicine offer an attractive treatment option for vocal fold scarring, with the aim to restore the native extracellular matrix microenvironment and biomechanical properties of the vocal folds by inhibiting progression of scarring and thus leading to restoration of normal vocal function. Hyaluronic acid is a bioactive glycosaminoglycan responsible for maintaining optimum viscoelastic properties of the vocal folds and hence is widely targeted in tissue engineering applications. This review covers advances in hyaluronic acid-based vocal fold tissue engineering and regeneration strategies.
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Affiliation(s)
- Tanaya Walimbe
- Weldon School of Biomedical Engineering, West Lafayette, Indiana
| | - Alyssa Panitch
- Weldon School of Biomedical Engineering, West Lafayette, Indiana; Department of Biomedical Engineering, University of California, Davis, California
| | - Preeti M Sivasankar
- Weldon School of Biomedical Engineering, West Lafayette, Indiana; Department of Speech, Language, and Hearing Sciences, Purdue University, West Lafayette, Indiana.
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Li L, Stiadle JM, Lau HK, Zerdoum AB, Jia X, Thibeault SL, Kiick KL. Tissue engineering-based therapeutic strategies for vocal fold repair and regeneration. Biomaterials 2016; 108:91-110. [PMID: 27619243 PMCID: PMC5035639 DOI: 10.1016/j.biomaterials.2016.08.054] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2016] [Revised: 08/29/2016] [Accepted: 08/31/2016] [Indexed: 01/01/2023]
Abstract
Vocal folds are soft laryngeal connective tissues with distinct layered structures and complex multicomponent matrix compositions that endow phonatory and respiratory functions. This delicate tissue is easily damaged by various environmental factors and pathological conditions, altering vocal biomechanics and causing debilitating vocal disorders that detrimentally affect the daily lives of suffering individuals. Modern techniques and advanced knowledge of regenerative medicine have led to a deeper understanding of the microstructure, microphysiology, and micropathophysiology of vocal fold tissues. State-of-the-art materials ranging from extracecullar-matrix (ECM)-derived biomaterials to synthetic polymer scaffolds have been proposed for the prevention and treatment of voice disorders including vocal fold scarring and fibrosis. This review intends to provide a thorough overview of current achievements in the field of vocal fold tissue engineering, including the fabrication of injectable biomaterials to mimic in vitro cell microenvironments, novel designs of bioreactors that capture in vivo tissue biomechanics, and establishment of various animal models to characterize the in vivo biocompatibility of these materials. The combination of polymeric scaffolds, cell transplantation, biomechanical stimulation, and delivery of antifibrotic growth factors will lead to successful restoration of functional vocal folds and improved vocal recovery in animal models, facilitating the application of these materials and related methodologies in clinical practice.
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Affiliation(s)
- Linqing Li
- Department of Materials Science and Engineering, University of Delaware, Newark, DE 19716, USA
| | - Jeanna M Stiadle
- Division of Otolaryngology-Head and Neck Surgery, Department of Surgery, University of Wisconsin-Madison, Madison, WI 53792, USA; Department of Communication Sciences and Disorders, University of Wisconsin-Madison, Madison, WI 53792, USA
| | - Hang K Lau
- Department of Materials Science and Engineering, University of Delaware, Newark, DE 19716, USA
| | - Aidan B Zerdoum
- Department of Biomedical Engineering, University of Delaware, Newark, DE 19716, USA
| | - Xinqiao Jia
- Department of Materials Science and Engineering, University of Delaware, Newark, DE 19716, USA; Department of Biomedical Engineering, University of Delaware, Newark, DE 19716, USA; Delaware Biotechnology Institute, 15 Innovation Way, Newark, DE 19711, USA
| | - Susan L Thibeault
- Division of Otolaryngology-Head and Neck Surgery, Department of Surgery, University of Wisconsin-Madison, Madison, WI 53792, USA; Department of Communication Sciences and Disorders, University of Wisconsin-Madison, Madison, WI 53792, USA.
| | - Kristi L Kiick
- Department of Materials Science and Engineering, University of Delaware, Newark, DE 19716, USA; Department of Biomedical Engineering, University of Delaware, Newark, DE 19716, USA; Delaware Biotechnology Institute, 15 Innovation Way, Newark, DE 19711, USA.
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