1
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Boetje L, Lan X, van Dijken J, Kaastra G, Polhuis M, Loos K. Thiol-Ene Click Cross-linking of Starch Oleate Films for Enhanced Properties. Biomacromolecules 2023; 24:5578-5588. [PMID: 37934174 PMCID: PMC10716852 DOI: 10.1021/acs.biomac.3c00507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Revised: 10/19/2023] [Accepted: 10/20/2023] [Indexed: 11/08/2023]
Abstract
Biobased films were synthesized from starch oleate (DS = 2.2) cross-linked with polyethylene glycol with Mn = 2000 and 1000 g · mol-1, and ethylene glycol, all of which were esterified with either lipoic acid (LA) or 3-mercaptopropionic acid (MPA). Cross-linking was achieved through a UV-initiated thiol-ene click, and confirmed by Fourier transform infrared spectroscopy and rheometry. The films exhibit higher degradation temperatures, and an increased degree of crystallinity as cross-linker length increased. The introduction of MPA-based cross-linkers resulted in hydrophilic films, while the contact angle was barely affected by the addition of LA-based cross-linkers. A reduction in maximum strength upon introducing the cross-linkers was observed, while an increase in elongation was observed for most of the LA-based cross-linkers. Our results demonstrate the potential for tuning the mechanical and thermal properties of starch-based films through the cross-linker choice, with some formulations exhibiting increased flexibility that may be well suited for packaging applications.
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Affiliation(s)
- Laura Boetje
- Macromolecular
Chemistry & New Polymeric Materials, Zernike Institute for Advanced
Materials, University of Groningen, Nijenbogh 4, 9747AG Groningen, The Netherlands
| | - Xiaohong Lan
- Macromolecular
Chemistry & New Polymeric Materials, Zernike Institute for Advanced
Materials, University of Groningen, Nijenbogh 4, 9747AG Groningen, The Netherlands
| | - Jur van Dijken
- Macromolecular
Chemistry & New Polymeric Materials, Zernike Institute for Advanced
Materials, University of Groningen, Nijenbogh 4, 9747AG Groningen, The Netherlands
| | - Gerbrich Kaastra
- Hogeschool
Van Hall Larenstein, 8934
CJLeeuwarden, The
Netherlands
| | - Michael Polhuis
- Royal
Avebe U.A., Zernikelaan
8, 9747AA Groningen, The Netherlands
| | - Katja Loos
- Macromolecular
Chemistry & New Polymeric Materials, Zernike Institute for Advanced
Materials, University of Groningen, Nijenbogh 4, 9747AG Groningen, The Netherlands
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2
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Kaur K, Murphy CM. Advances in the Development of Nano-Engineered Mechanically Robust Hydrogels for Minimally Invasive Treatment of Bone Defects. Gels 2023; 9:809. [PMID: 37888382 PMCID: PMC10606921 DOI: 10.3390/gels9100809] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2023] [Revised: 09/30/2023] [Accepted: 10/03/2023] [Indexed: 10/28/2023] Open
Abstract
Injectable hydrogels were discovered as attractive materials for bone tissue engineering applications given their outstanding biocompatibility, high water content, and versatile fabrication platforms into materials with different physiochemical properties. However, traditional hydrogels suffer from weak mechanical strength, limiting their use in heavy load-bearing areas. Thus, the fabrication of mechanically robust injectable hydrogels that are suitable for load-bearing environments is of great interest. Successful material design for bone tissue engineering requires an understanding of the composition and structure of the material chosen, as well as the appropriate selection of biomimetic natural or synthetic materials. This review focuses on recent advancements in materials-design considerations and approaches to prepare mechanically robust injectable hydrogels for bone tissue engineering applications. We outline the materials-design approaches through a selection of materials and fabrication methods. Finally, we discuss unmet needs and current challenges in the development of ideal materials for bone tissue regeneration and highlight emerging strategies in the field.
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Affiliation(s)
- Kulwinder Kaur
- Tissue Engineering Research Group, Department of Anatomy & Regenerative Medicine, RCSI University of Medicine and Health Sciences, D02 YN77 Dublin, Ireland;
- School of Pharmacy and Biomolecular Sciences, RCSI University of Medicine and Health Sciences, D02 YN77 Dublin, Ireland
| | - Ciara M. Murphy
- Tissue Engineering Research Group, Department of Anatomy & Regenerative Medicine, RCSI University of Medicine and Health Sciences, D02 YN77 Dublin, Ireland;
- Advanced Materials and Bioengineering Research (AMBER) Centre, Trinity College Dublin (TCD), D02 PN40 Dublin, Ireland
- Trinity Centre for Bioengineering, Trinity College Dublin (TCD), D02 PN40 Dublin, Ireland
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3
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Wan X, Xiao J, Yin M, Yao Y, Luo J. Counterion-induced antibiotic-based small-molecular micelles for methicillin-resistant Staphylococcus aureus infections. Acta Biomater 2023; 166:627-639. [PMID: 37220819 DOI: 10.1016/j.actbio.2023.05.029] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 05/15/2023] [Accepted: 05/16/2023] [Indexed: 05/25/2023]
Abstract
A new counterion-induced small-molecule micelle (SM) with surface charge-switchable activities for methicillin-resistant Staphylococcus aureus (MRSA) infections is proposed. The amphiphilic molecule formed by zwitterionic compound and the antibiotic ciprofloxacin (CIP), via a "mild salifying reaction" of the amino and benzoic acid groups, can spontaneously assemble into counterion-induced SMs in water. Through vinyl groups designed on zwitterionic compound, the counterion-induced SMs could be readily cross-linked using mercapto-3, 6-dioxoheptane by click reaction, to create pH-sensitive cross-linked micelles (CSMs). Mercaptosuccinic acid was also decorated on the CSMs (DCSMs) by the same click reaction to afford charge-switchable activities, resulting in CSMs that were biocompatible with red blood cells and mammalian cells in normal tissues (pH 7.4), while having strong retention to negatively charged bacterial surfaces at infection sites, based on electrostatic interaction (pH 5.5). As a result, the DCSMs could penetrate deep into bacterial biofilms and then release drugs in response to the bacterial microenvironment, effectively killing the bacteria in the deeper biofilm. The new DCSMs have several advantages such as robust stability, a high drug loading content (∼ 30%), easy fabrication, and good structural control. Overall, the concept holds promise for the development of new products for clinical application. STATEMENT OF SIGNIFICANCE: We fabricated a new counterion-induced small-molecule micelle with surface charge-switchable activities (DCSMs) for methicillin-resistant Staphylococcus aureus (MRSA) infections. Compared with reported covalent systems, the DCSMs not only have improved stability, high drug loading content (∼ 30%), and good biosafety, but also have the environmental stimuli response, and antibacterial activity of the original drugs. As a result, the DCSMs exhibited enhanced antibacterial activities against MRSA both in vitro and in vivo. Overall, the concept holds promise for the development of new products for clinical application.
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Affiliation(s)
- Xiaohui Wan
- College of Chemistry and Environment, Southwest Minzu University, Chengdu 610041, China
| | - Jipeng Xiao
- College of Chemistry and Environment, Southwest Minzu University, Chengdu 610041, China
| | - Meihui Yin
- College of Chemistry and Environment, Southwest Minzu University, Chengdu 610041, China
| | - Yongchao Yao
- Department of Biotherapy, Cancer Center and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, 610041, China.
| | - Jianbin Luo
- College of Chemistry and Environment, Southwest Minzu University, Chengdu 610041, China.
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4
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Hasanzadeh E, Seifalian A, Mellati A, Saremi J, Asadpour S, Enderami SE, Nekounam H, Mahmoodi N. Injectable hydrogels in central nervous system: Unique and novel platforms for promoting extracellular matrix remodeling and tissue engineering. Mater Today Bio 2023; 20:100614. [PMID: 37008830 PMCID: PMC10050787 DOI: 10.1016/j.mtbio.2023.100614] [Citation(s) in RCA: 27] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 02/23/2023] [Accepted: 03/16/2023] [Indexed: 04/04/2023] Open
Abstract
Repairing central nervous system (CNS) is difficult due to the inability of neurons to recover after damage. A clinically acceptable treatment to promote CNS functional recovery and regeneration is currently unavailable. According to recent studies, injectable hydrogels as biodegradable scaffolds for CNS tissue engineering and regeneration have exceptionally desirable attributes. Hydrogel has a biomimetic structure similar to extracellular matrix, hence has been considered a 3D scaffold for CNS regeneration. An interesting new type of hydrogel, injectable hydrogels, can be injected into target areas with little invasiveness and imitate several aspects of CNS. Injectable hydrogels are being researched as therapeutic agents because they may imitate numerous properties of CNS tissues and hence reduce subsequent injury and regenerate neural tissue. Because of their less adverse effects and cost, easier use and implantation with less pain, and faster regeneration capacity, injectable hydrogels, are more desirable than non-injectable hydrogels. This article discusses the pathophysiology of CNS and the use of several kinds of injectable hydrogels for brain and spinal cord tissue engineering, paying particular emphasis to recent experimental studies.
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Affiliation(s)
- Elham Hasanzadeh
- Immunogenetics Research Center, Department of Tissue Engineering & Regenerative Medicine, School of Advanced Technologies in Medicine, Mazandaran University of Medical Sciences, Sari, Iran
| | - Alexander Seifalian
- Nanotechnology & Regenerative Medicine Commercialisation Centre (NanoRegMed Ltd, Nanoloom Ltd, & Liberum Health Ltd), London BioScience Innovation Centre, 2 Royal College Street, London, UK
| | - Amir Mellati
- Department of Tissue Engineering & Regenerative Medicine, School of Advanced Technologies in Medicine, Mazandaran University of Medical Sciences, Sari, Iran
- Molecular and Cell Biology Research Center, Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
| | - Jamileh Saremi
- Research Center for Noncommunicable Diseases, Jahrom University of Medical Sciences, Jahrom, Iran
| | - Shiva Asadpour
- Department of Tissue Engineering and Applied Cell Sciences, School of Advanced Technologies, Shahrekord University of Medical Sciences, Shahrekord, Iran
| | - Seyed Ehsan Enderami
- Immunogenetics Research Center, Department of Medical Biotechnology, School of Advanced Technologies in Medicine, Mazandaran University of Medical Sciences, Sari, Iran
| | - Houra Nekounam
- Department of Medical Nanotechnology, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Narges Mahmoodi
- Sina Trauma and Surgery Research Center, Tehran University of Medical Sciences, Tehran, Iran
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5
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Hewawasam RS, Blomberg R, Šerbedžija P, Magin CM. Chemical Modification of Human Decellularized Extracellular Matrix for Incorporation into Phototunable Hybrid-Hydrogel Models of Tissue Fibrosis. ACS APPLIED MATERIALS & INTERFACES 2023; 15:15071-15083. [PMID: 36917510 PMCID: PMC11177228 DOI: 10.1021/acsami.2c18330] [Citation(s) in RCA: 16] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Tissue fibrosis remains a serious health condition with high morbidity and mortality rates. There is a critical need to engineer model systems that better recapitulate the spatial and temporal changes in the fibrotic extracellular microenvironment and enable study of the cellular and molecular alterations that occur during pathogenesis. Here, we present a process for chemically modifying human decellularized extracellular matrix (dECM) and incorporating it into a dynamically tunable hybrid-hydrogel system containing a poly(ethylene glycol)-α methacrylate (PEGαMA) backbone. Following modification and characterization, an off-stoichiometry thiol-ene Michael addition reaction resulted in hybrid-hydrogels with mechanical properties that could be tuned to recapitulate many healthy tissue types. Next, photoinitiated, free-radical homopolymerization of excess α-methacrylates increased crosslinking density and hybrid-hydrogel elastic modulus to mimic a fibrotic microenvironment. The incorporation of dECM into the PEGαMA hydrogel decreased the elastic modulus and, relative to fully synthetic hydrogels, increased the swelling ratio, the average molecular weight between crosslinks, and the mesh size of hybrid-hydrogel networks. These changes were proportional to the amount of dECM incorporated into the network. Dynamic stiffening increased the elastic modulus and decreased the swelling ratio, average molecular weight between crosslinks, and the mesh size of hybrid-hydrogels, as expected. Stiffening also activated human fibroblasts, as measured by increases in average cellular aspect ratio (1.59 ± 0.02 to 2.98 ± 0.20) and expression of α-smooth muscle actin (αSMA). Fibroblasts expressing αSMA increased from 25.8 to 49.1% upon dynamic stiffening, demonstrating that hybrid-hydrogels containing human dECM support investigation of dynamic mechanosensing. These results improve our understanding of the biomolecular networks formed within hybrid-hydrogels: this fully human phototunable hybrid-hydrogel system will enable researchers to control and decouple the biochemical changes that occur during fibrotic pathogenesis from the resulting increases in stiffness to study the dynamic cell-matrix interactions that perpetuate fibrotic diseases.
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Affiliation(s)
- Rukshika S Hewawasam
- Department of Bioengineering, University of Colorado, Denver|Anschutz Medical Campus, 2115 Scranton Street, Suite 3010, Aurora, Colorado 80045-2559, United States
| | - Rachel Blomberg
- Department of Bioengineering, University of Colorado, Denver|Anschutz Medical Campus, 2115 Scranton Street, Suite 3010, Aurora, Colorado 80045-2559, United States
| | - Predrag Šerbedžija
- Department of Bioengineering, University of Colorado, Denver|Anschutz Medical Campus, 2115 Scranton Street, Suite 3010, Aurora, Colorado 80045-2559, United States
| | - Chelsea M Magin
- Department of Bioengineering, University of Colorado, Denver|Anschutz Medical Campus, 2115 Scranton Street, Suite 3010, Aurora, Colorado 80045-2559, United States
- Department of Pediatrics, University of Colorado, Anschutz Medical Campus, 2115 Scranton Street, Suite 3010, Aurora, Colorado 80045-2559, United States
- Division of Pulmonary Sciences and Critical Care Medicine, Department of Medicine, University of Colorado, Anschutz Medical Campus, 2115 Scranton Street, Suite 3010, Aurora, Colorado 80045-2559, United States
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6
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Månsson LK, Pitenis AA, Wilson MZ. Extracellular Optogenetics at the Interface of Synthetic Biology and Materials Science. Front Bioeng Biotechnol 2022; 10:903982. [PMID: 35774061 PMCID: PMC9237228 DOI: 10.3389/fbioe.2022.903982] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Accepted: 05/20/2022] [Indexed: 11/15/2022] Open
Abstract
We review fundamental mechanisms and applications of OptoGels: hydrogels with light-programmable properties endowed by photoswitchable proteins (“optoproteins”) found in nature. Light, as the primary source of energy on earth, has driven evolution to develop highly-tuned functionalities, such as phototropism and circadian entrainment. These functions are mediated through a growing family of optoproteins that respond to the entire visible spectrum ranging from ultraviolet to infrared by changing their structure to transmit signals inside of cells. In a recent series of articles, engineers and biochemists have incorporated optoproteins into a variety of extracellular systems, endowing them with photocontrollability. While other routes exist for dynamically controlling material properties, light-sensitive proteins have several distinct advantages, including precise spatiotemporal control, reversibility, substrate selectivity, as well as biodegradability and biocompatibility. Available conjugation chemistries endow OptoGels with a combinatorially large design space determined by the set of optoproteins and polymer networks. These combinations result in a variety of tunable material properties. Despite their potential, relatively little of the OptoGel design space has been explored. Here, we aim to summarize innovations in this emerging field and highlight potential future applications of these next generation materials. OptoGels show great promise in applications ranging from mechanobiology, to 3D cell and organoid engineering, and programmable cell eluting materials.
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Affiliation(s)
- Lisa K. Månsson
- Materials Department, University of California, Santa Barbara, Santa Barbara, CA, United States
| | - Angela A. Pitenis
- Materials Department, University of California, Santa Barbara, Santa Barbara, CA, United States
- Center for BioEngineering, University of California, Santa Barbara, Santa Barbara, CA, United States
- *Correspondence: Angela A. Pitenis, ; Maxwell Z. Wilson,
| | - Maxwell Z. Wilson
- Center for BioEngineering, University of California, Santa Barbara, Santa Barbara, CA, United States
- Department of Molecular, Cellular, and Developmental Biology, University of California, Santa Barbara, Santa Barbara, CA, United States
- Neuroscience Research Institute, University of California, Santa Barbara, Santa Barbara, CA, United States
- *Correspondence: Angela A. Pitenis, ; Maxwell Z. Wilson,
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7
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Luminescent Self-Assembled Monolayer on Gold Nanoparticles: Tuning of Emission According to the Surface Curvature. CHEMOSENSORS 2022. [DOI: 10.3390/chemosensors10050176] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Until now, the ability to form a self-assembled monolayer (SAM) on a surface has been investigated according to deposition techniques, which in turn depend on surface-coater interactions. In this paper, we pursued two goals: to form a SAM on a gold nanosurface and to correlate its formation to the nanosurface curvature. To achieve these objectives, gold nanoparticles of different shapes (spheres, rods, and triangles) were functionalized with a luminescent thiolated bipyridine (Bpy-SH), and the SAM formation was studied by investigating the photo-physics of Bpy-SH. We have shown that emission wavelength and excited-state lifetime of Bpy-SH are strongly correlated to the formation of specific aggregates within SAMs, the nature of these aggregates being in close correlation to the shape of the nanoparticles. Micro-Raman spectroscopy investigation was used to test the SERS effect of gold nanoparticles on thiolated bipyridine forming SAMs.
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8
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Employing Cellulose Nanofiber-Based Hydrogels for Burn Dressing. Polymers (Basel) 2022; 14:polym14061207. [PMID: 35335540 PMCID: PMC8951233 DOI: 10.3390/polym14061207] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Revised: 03/07/2022] [Accepted: 03/15/2022] [Indexed: 01/29/2023] Open
Abstract
The aim of this research was to fabricate a burn dressing in the form of hydrogel films constructed with cellulose nanofibers (CNF) that has pain-relieving properties, in addition to wound healing. In this study, the hydrogels were prepared in the form of film. For this, CNF at weight ratios of 1, 2, and 3 wt.%, 1 wt.% of hydroxyethyl cellulose (HEC), and citric acid (CA) crosslinker with 10 and 20 wt.% were used. FE-SEM analysis showed that the structure of the CNF was preserved after hydrogel preparation. Cationization of CNF by C6H14NOCl was confirmed by FTIR spectroscopy. The drug release analysis results showed a linear relationship between the amount of absorption and the concentration of the drug. The MTT test (assay protocol for cell viability and proliferation) showed the high effectiveness of cationization of CNF and confirmed the non-toxicity of the resulting hydrogels.
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9
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Synthesis of polymer networks by means of addition reactions of tri-amine and poly(ethylene glycol) diacrylate or diglycidyl ether compounds. Polym Bull (Berl) 2021. [DOI: 10.1007/s00289-020-03241-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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10
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Caldwell AS, Aguado BA, Anseth KS. Designing Microgels for Cell Culture and Controlled Assembly of Tissue Microenvironments. ADVANCED FUNCTIONAL MATERIALS 2020; 30:1907670. [PMID: 33841061 PMCID: PMC8026140 DOI: 10.1002/adfm.201907670] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Indexed: 05/04/2023]
Abstract
Micron-sized hydrogels, termed microgels, are emerging as multifunctional platforms that can recapitulate tissue heterogeneity in engineered cell microenvironments. The microgels can function as either individual cell culture units or can be assembled into larger scaffolds. In this manner, individual microgels can be customized for single or multi-cell co-culture applications, or heterogeneous populations can be used as building blocks to create microporous assembled scaffolds that more closely mimic tissue heterogeneities. The inherent versatility of these materials allows user-defined control of the microenvironments, from the order of singly encapsulated cells to entire three-dimensional cell scaffolds. These hydrogel scaffolds are promising for moving towards personalized medicine approaches and recapitulating the multifaceted microenvironments that exist in vivo.
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Affiliation(s)
- Alexander S. Caldwell
- Department of Chemical and Biological Engineering, University of Colorado – Boulder, USA, 80303
- BioFrontiers Institute, University of Colorado – Boulder, USA, 80303
| | - Brian A. Aguado
- Department of Chemical and Biological Engineering, University of Colorado – Boulder, USA, 80303
- BioFrontiers Institute, University of Colorado – Boulder, USA, 80303
| | - Kristi S. Anseth
- Department of Chemical and Biological Engineering, University of Colorado – Boulder, USA, 80303
- BioFrontiers Institute, University of Colorado – Boulder, USA, 80303
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11
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Lüchow M, Fortuin L, Malkoch M. Modular, synthetic, thiol‐ene mediated hydrogel networks as potential scaffolds for
3D
cell cultures and tissue regeneration. JOURNAL OF POLYMER SCIENCE 2020. [DOI: 10.1002/pol.20200530] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Mads Lüchow
- Division of Coating Technology, Department of Fibre and Polymer Technology KTH Stockholm Sweden
| | - Lisa Fortuin
- Division of Coating Technology, Department of Fibre and Polymer Technology KTH Stockholm Sweden
| | - Michael Malkoch
- Division of Coating Technology, Department of Fibre and Polymer Technology KTH Stockholm Sweden
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12
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Naga N, Sato M, Mori K, Nageh H, Nakano T. Synthesis of Network Polymers by Means of Addition Reactions of Multifunctional-Amine and Poly(ethylene glycol) Diglycidyl Ether or Diacrylate Compounds. Polymers (Basel) 2020; 12:E2047. [PMID: 32911796 PMCID: PMC7570363 DOI: 10.3390/polym12092047] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 09/01/2020] [Accepted: 09/03/2020] [Indexed: 12/11/2022] Open
Abstract
Addition reactions of multi-functional amine, polyethylene imine (PEI) or diethylenetriamine (DETA), and poly(ethylene glycol) diglycidyl ether (PEGDE) or poly(ethylene glycol) diacrylate (PEGDA), have been investigated to obtain network polymers in H2O, dimethyl sulfoxide (DMSO), and ethanol (EtOH). Ring opening addition reaction of the multi-functional amine and PEGDE in H2O at room temperature or in DMSO at 90 °C using triphenylphosphine as a catalyst yielded gels. Aza-Michael addition reaction of the multi-functional amine and PEGDA in DMSO or EtOH at room temperature also yielded corresponding gels. Compression test of the gels obtained with PEI showed higher Young's modulus than those with DETA. The reactions of the multi-functional amine and low molecular weight PEGDA in EtOH under the specific conditions yielded porous polymers induced by phase separation during the network formation. The morphology of the porous polymers could be controlled by the reaction conditions, especially monomer concentration and feed ratio of the multi-functional amine to PEGDA of the reaction system. The porous structure was formed by connected spheres or a co-continuous monolithic structure. The porous polymers were unbreakable by compression, and their Young's modulus increased with the increase in the monomer concentration of the reaction systems. The porous polymers absorbed various solvents derived from high affinity between the polyethylene glycol units in the network structure and the solvents.
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Affiliation(s)
- Naofumi Naga
- Department of Applied Chemistry, College of Engineering, Shibaura Institute of Technology, 3-7-5 Toyosu, Koto-ku, Tokyo 135-8548, Japan;
- Graduate School of Science & Engineering, Shibaura Institute of Technology, 3-7-5 Toyosu, Koto-ku, Tokyo 135-8548, Japan;
| | - Mitsusuke Sato
- Graduate School of Science & Engineering, Shibaura Institute of Technology, 3-7-5 Toyosu, Koto-ku, Tokyo 135-8548, Japan;
| | - Kensuke Mori
- Department of Applied Chemistry, College of Engineering, Shibaura Institute of Technology, 3-7-5 Toyosu, Koto-ku, Tokyo 135-8548, Japan;
| | - Hassan Nageh
- Institute for Catalysis and Graduate School of Chemical Sciences and Engineering, Hokkaido University, N 21, W 10, Kita-ku Sapporo 001-0021, Japan; (H.N.); (T.N.)
| | - Tamaki Nakano
- Institute for Catalysis and Graduate School of Chemical Sciences and Engineering, Hokkaido University, N 21, W 10, Kita-ku Sapporo 001-0021, Japan; (H.N.); (T.N.)
- Integrated Research Consortium on Chemical Sciences, Institute for Catalysis, Hokkaido University, N 21, W 10, Kita-ku Sapporo 001-0021, Japan
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13
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Kausar A. Nanocarbon in Polymeric Nanocomposite Hydrogel—Design and Multi-Functional Tendencies. POLYM-PLAST TECH MAT 2020. [DOI: 10.1080/25740881.2020.1757106] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Ayesha Kausar
- Nanosciences Division, National Center for Physics, Quaid-i-Azam University Campus, Islamabad, Pakistan
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14
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Albers PM, van der Ven LGJ, van Benthem RATM, Esteves ACC, de With G. Water Swelling Behavior of Poly(ethylene glycol)-Based Polyurethane Networks. Macromolecules 2020; 53:862-874. [PMID: 32063654 PMCID: PMC7017371 DOI: 10.1021/acs.macromol.9b02275] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 01/16/2020] [Indexed: 01/06/2023]
Abstract
Defects in a polymer network complicate an accurate calculation of structural parameters such as the molar mass between cross-links M c, typically obtained from experimental swelling data. In this paper the formation and structure of poly(ethylene glycol) (PEG)-based polyurethane networks containing PEG-mono methyl ether dangling chains are studied. The phantom network model can describe the swelling behavior of these networks only when a composition-dependent interaction parameter is used and the formation of allophanates is accounted for. A clear transition in the network formation is found at the PEG network precursor molar mass at which entanglements are formed in the melt. Correction factors based on structure calculations using the Miller-Macosko-Vallés probability approach are proposed and validated for an accurate calculation of the M c of these defect-containing networks. This provides a new approach for studies that requires an accurate estimate of the M c, only based on experimentally straightforward swelling experiments.
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Affiliation(s)
- Peter
T. M. Albers
- Laboratory
of Physical Chemistry, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, Eindhoven, The Netherlands
- Dutch
Polymer Institute (DPI), P.O. Box 902, 5600 AX Eindhoven, The Netherlands
| | - Leendert G. J. van der Ven
- Laboratory
of Physical Chemistry, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, Eindhoven, The Netherlands
| | - Rolf A. T. M. van Benthem
- Laboratory
of Physical Chemistry, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, Eindhoven, The Netherlands
- DSM
Ahead BV Netherlands, P.O. Box 18, 6160 MD Geleen, The Netherlands
| | - A. Catarina C. Esteves
- Laboratory
of Physical Chemistry, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, Eindhoven, The Netherlands
| | - Gijsbertus de With
- Laboratory
of Physical Chemistry, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, Eindhoven, The Netherlands
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15
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Torres-Mapa ML, Singh M, Simon O, Mapa JL, Machida M, Günther A, Roth B, Heinemann D, Terakawa M, Heisterkamp A. Fabrication of a Monolithic Lab-on-a-Chip Platform with Integrated Hydrogel Waveguides for Chemical Sensing. SENSORS 2019; 19:s19194333. [PMID: 31597248 PMCID: PMC6806100 DOI: 10.3390/s19194333] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Revised: 09/27/2019] [Accepted: 09/27/2019] [Indexed: 02/06/2023]
Abstract
Hydrogel waveguides have found increased use for variety of applications where biocompatibility and flexibility are important. In this work, we demonstrate the use of polyethylene glycol diacrylate (PEGDA) waveguides to realize a monolithic lab-on-a-chip device. We performed a comprehensive study on the swelling and optical properties for different chain lengths and concentrations in order to realize an integrated biocompatible waveguide in a microfluidic device for chemical sensing. Waveguiding properties of PEGDA hydrogel were used to guide excitation light into a microfluidic channel to measure the fluorescence emission profile of rhodamine 6G as well as collect the fluorescence signal from the same device. Overall, this work shows the potential of hydrogel waveguides to facilitate delivery and collection of optical signals for potential use in wearable and implantable lab-on-a-chip devices.
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Affiliation(s)
- Maria Leilani Torres-Mapa
- Institute of Quantum Optics, Gottfried Wilhelm Leibniz University Hannover, 30167 Hannover, Germany.
- Lower Saxony Centre for Biomedical Engineering, Implant Research and Development (NIFE), 30625 Hannover, Germany.
| | - Manmeet Singh
- Institute of Quantum Optics, Gottfried Wilhelm Leibniz University Hannover, 30167 Hannover, Germany.
- Lower Saxony Centre for Biomedical Engineering, Implant Research and Development (NIFE), 30625 Hannover, Germany.
| | - Olga Simon
- Lower Saxony Centre for Biomedical Engineering, Implant Research and Development (NIFE), 30625 Hannover, Germany.
- Industrial and Biomedical Optics Department, Laser Zentrum Hannover e.V., 30419 Hannover, Germany.
| | - Jose Louise Mapa
- Institute of Quantum Optics, Gottfried Wilhelm Leibniz University Hannover, 30167 Hannover, Germany.
| | - Manan Machida
- School of Integrated Design Engineering, Keio University, Yokohama 223-8522, Japan.
| | - Axel Günther
- Hannover Centre for Optical Technologies, Gottfried Wilhelm Leibniz University Hannover, 30167 Hannover, Germany.
| | - Bernhard Roth
- Hannover Centre for Optical Technologies, Gottfried Wilhelm Leibniz University Hannover, 30167 Hannover, Germany.
- Cluster of Excellence PhoenixD (Photonics, Optics and Engineering-Innovation Across Disciplines), 30167 Hannover, Germany.
| | - Dag Heinemann
- Lower Saxony Centre for Biomedical Engineering, Implant Research and Development (NIFE), 30625 Hannover, Germany.
- Industrial and Biomedical Optics Department, Laser Zentrum Hannover e.V., 30419 Hannover, Germany.
| | - Mitsuhiro Terakawa
- School of Integrated Design Engineering, Keio University, Yokohama 223-8522, Japan.
| | - Alexander Heisterkamp
- Institute of Quantum Optics, Gottfried Wilhelm Leibniz University Hannover, 30167 Hannover, Germany.
- Lower Saxony Centre for Biomedical Engineering, Implant Research and Development (NIFE), 30625 Hannover, Germany.
- Industrial and Biomedical Optics Department, Laser Zentrum Hannover e.V., 30419 Hannover, Germany.
- School of Integrated Design Engineering, Keio University, Yokohama 223-8522, Japan.
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16
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Synthesis of Mono- and Dithiols of Tetraethylene Glycol and Poly(ethylene glycol)s via Enzyme Catalysis. Catalysts 2019. [DOI: 10.3390/catal9030228] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
This paper investigates the transesterification of methyl 3-mercaptopropionate (MP-SH) with tetraethylene glycol (TEG) and poly(ethylene glycol)s (PEG)s catalyzed by Candida antarctica Lipase B (CALB) without the use of solvent (in bulk). The progress of the reactions was monitored by 1H-NMR spectroscopy. We found that the reactions proceeded in a step-wise manner, first producing monothiols. TEG-monothiol was obtained in 15 min, while conversion to dithiol took 8 h. Monothiols from PEGs with Mn = 1000 and 2050 g/mol were obtained in 8 and 16 h, respectively. MALDI-ToF mass spectrometry verified the absence of dithiols. The synthesis of dithiols required additional fresh CALB and MP-SH. The structure of the products was confirmed by 1H-NMR and 13C-NMR spectroscopy. Enzyme catalysis was found to be a powerful tool to effectively synthesize thiol-functionalized TEGs and PEGs.
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17
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Arslan M, Aydin D, Degirmenci A, Sanyal A, Sanyal R. Embedding Well-Defined Responsive Hydrogels with Nanocontainers: Tunable Materials from Telechelic Polymers and Cyclodextrins. ACS OMEGA 2017; 2:6658-6667. [PMID: 31457261 PMCID: PMC6645099 DOI: 10.1021/acsomega.7b00787] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Accepted: 09/27/2017] [Indexed: 06/10/2023]
Abstract
Design, synthesis, and application of cyclodextrin (CD) containing thermoresponsive hydrogels fabricated from thiol-reactive telechelic polymers are reported. Hydrophilic polymers containing 2-hydroxyethyl methacrylate and/or di(ethylene glycol)methylether methacrylate monomers as side chains and thiol-reactive groups at chain ends were synthesized. A series of hydrogels was fabricated using thiol-ene conjugation of these thiol-reactive polymers with multivalent thiol-containing CDs as crosslinkers. Clear and transparent hydrogels were obtained with good conversion (79-89%) by utilizing the "nucleophilic" and "radical" thiol-ene "click" reactions. Analysis of the amount of residual thiol groups in these hydrogels using Ellman's reagent suggested that gels with a moderately well-defined network structure were obtained. Hydrogels fabricated using different telechelic polymers were examined for their properties such as morphology, equilibrium water uptake, and rheological characteristics. Cytocompatibility of these hydrogels was ascertained by a cell viability assay that demonstrated low toxicity toward fibroblast cells. Thereafter, the CD-containing hydrogels were evaluated for the loading and controlled release of puerarin, an antiglaucoma drug. Utilization of thermoresponsive polymers as the matrix for these hydrogels allows use of temperature as a stimulus to modulate the drug release. A slower and more sustained drug release was observed at physiological temperatures compared to ambient conditions. The effect of temperature on the elasticity of the hydrogel was investigated rheologically to demonstrate that the collapse of the network structure occurs near physiological temperatures. The increased hydrophobicity and compactness of the gel matrix at higher temperatures results in a slower drug release. The strategy employed here demonstrates that tuning the matrix composition of hydrogels with well-defined network structures through appropriate choice of responsive copolymers allows design of materials with control of their physical properties and drug-release behavior.
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Affiliation(s)
- Mehmet Arslan
- Department
of Chemistry, Bogazici University, Bebek, Istanbul 34342, Turkey
| | - Duygu Aydin
- Department
of Chemistry, Bogazici University, Bebek, Istanbul 34342, Turkey
| | - Aysun Degirmenci
- Department
of Chemistry, Bogazici University, Bebek, Istanbul 34342, Turkey
| | - Amitav Sanyal
- Department
of Chemistry, Bogazici University, Bebek, Istanbul 34342, Turkey
- Center
for Life Sciences and Technologies, Bogazici
University, Istanbul 34342, Turkey
| | - Rana Sanyal
- Department
of Chemistry, Bogazici University, Bebek, Istanbul 34342, Turkey
- Center
for Life Sciences and Technologies, Bogazici
University, Istanbul 34342, Turkey
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18
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Hoffmann C, Chiaula V, Yu L, Pinelo M, Woodley JM, Daugaard AE. Simple Preparation of Thiol-Ene Particles in Glycerol and Surface Functionalization by Thiol-Ene Chemistry (TEC) and Surface Chain Transfer Free Radical Polymerization (SCT-FRP). Macromol Rapid Commun 2017; 39. [DOI: 10.1002/marc.201700394] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Revised: 08/16/2017] [Indexed: 12/27/2022]
Affiliation(s)
- Christian Hoffmann
- Department of Chemical and Biochemical Engineering; Danish Polymer Centre; Technical University of Denmark; Søltofts Plads Building 229 Kgs. Lyngby 2800 Denmark
| | - Valeria Chiaula
- Department of Chemical and Biochemical Engineering; Danish Polymer Centre; Technical University of Denmark; Søltofts Plads Building 229 Kgs. Lyngby 2800 Denmark
| | - Liyun Yu
- Department of Chemical and Biochemical Engineering; Danish Polymer Centre; Technical University of Denmark; Søltofts Plads Building 229 Kgs. Lyngby 2800 Denmark
| | - Manuel Pinelo
- Department of Chemical and Biochemical Engineering; Center for BioProcess Engineering; Technical University of Denmark; Søltofts Plads Building 229 Kgs. Lyngby 2800 Denmark
| | - John M. Woodley
- Department of Chemical and Biochemical Engineering; Process and Systems Engineering Center (PROSYS); Technical University of Denmark; Søltofts Plads Building 229 Kgs. Lyngby 2800 Denmark
| | - Anders E. Daugaard
- Department of Chemical and Biochemical Engineering; Danish Polymer Centre; Technical University of Denmark; Søltofts Plads Building 229 Kgs. Lyngby 2800 Denmark
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19
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Moon NG, Pekkanen AM, Long TE, Showalter TN, Libby B. Thiol-Michael ‘click’ hydrogels as an imageable packing material for cancer therapy. POLYMER 2017. [DOI: 10.1016/j.polymer.2017.07.078] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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20
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Liu M, Zeng X, Ma C, Yi H, Ali Z, Mou X, Li S, Deng Y, He N. Injectable hydrogels for cartilage and bone tissue engineering. Bone Res 2017; 5:17014. [PMID: 28584674 PMCID: PMC5448314 DOI: 10.1038/boneres.2017.14] [Citation(s) in RCA: 643] [Impact Index Per Article: 91.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2016] [Revised: 01/08/2017] [Accepted: 01/10/2017] [Indexed: 12/17/2022] Open
Abstract
Tissue engineering has become a promising strategy for repairing damaged cartilage and bone tissue. Among the scaffolds for tissue-engineering applications, injectable hydrogels have demonstrated great potential for use as three-dimensional cell culture scaffolds in cartilage and bone tissue engineering, owing to their high water content, similarity to the natural extracellular matrix (ECM), porous framework for cell transplantation and proliferation, minimal invasive properties, and ability to match irregular defects. In this review, we describe the selection of appropriate biomaterials and fabrication methods to prepare novel injectable hydrogels for cartilage and bone tissue engineering. In addition, the biology of cartilage and the bony ECM is also summarized. Finally, future perspectives for injectable hydrogels in cartilage and bone tissue engineering are discussed.
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Affiliation(s)
- Mei Liu
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing, PR China
| | - Xin Zeng
- Nanjing Maternity and Child Health Care Hospital, Nanjing, PR China
| | - Chao Ma
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing, PR China
| | - Huan Yi
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing, PR China
| | - Zeeshan Ali
- School of Applied Chemistry and Biotechnology, Shenzhen Polytechnic, Shenzhen, PR China
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing, PR China
| | - Xianbo Mou
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing, PR China
| | - Song Li
- Hunan Key Laboratory of Green Chemistry and Application of Biological Nanotechnology, Hunan University of Technology, Zhuzhou, PR China
| | - Yan Deng
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing, PR China
- Hunan Key Laboratory of Green Chemistry and Application of Biological Nanotechnology, Hunan University of Technology, Zhuzhou, PR China
| | - Nongyue He
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing, PR China
- Hunan Key Laboratory of Green Chemistry and Application of Biological Nanotechnology, Hunan University of Technology, Zhuzhou, PR China
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21
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Abstract
A simple synthetic pathway to broaden the accessibility of thiol-functional polymers including formation of dendritic hydrogelsviaTEC chemistry.
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Affiliation(s)
- O. C. J. Andrén
- KTH Royal Institute of Technology
- Department of Fiber and Polymer Technology
- SE-100 44 Stockholm
- Sweden
| | - M. Malkoch
- KTH Royal Institute of Technology
- Department of Fiber and Polymer Technology
- SE-100 44 Stockholm
- Sweden
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22
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Lee DG, An SY, Um MS, Choi WJ, Noh SM, Jung HW, Oh JK. Photo-induced thiol-ene crosslinked polymethacrylate networks reinforced with Al2O3 nanoparticles. POLYMER 2016. [DOI: 10.1016/j.polymer.2016.08.049] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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23
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Baniasadi H, Mashayekhan S, Fadaoddini S, Haghirsharifzamini Y. Design, fabrication and characterization of oxidized alginate–gelatin hydrogels for muscle tissue engineering applications. J Biomater Appl 2016; 31:152-61. [DOI: 10.1177/0885328216634057] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
In this study, we reported the preparation of self cross-linked oxidized alginate–gelatin hydrogels for muscle tissue engineering. The effect of oxidation degree (OD) and oxidized alginate/gelatin (OA/GEL) weight ratio were examined and the results showed that in the constant OA/GEL weight ratio, both cross-linking density and Young’s modulus enhanced by increasing OD due to increment of aldehyde groups. Furthermore, the degradation rate was increased with increasing OD probably due to decrement in alginate molecular weight during oxidation reaction facilitated degradation of alginate chains. MTT cytotoxicity assays performed on Wharton's Jelly-derived umbilical cord mesenchymal stem cells cultured on hydrogels with OD of 30% showed that the highest rate of cell proliferation belong to hydrogel with OA/GEL weight ratio of 30/70. Overall, it can be concluded from all obtained results that the prepared hydrogel with OA/GEL weight ratio and OD of 30/70 and 30%, respectively, could be proper candidate for use in muscle tissue engineering.
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Affiliation(s)
- Hossein Baniasadi
- Department of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran, Iran
| | - Shohreh Mashayekhan
- Department of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran, Iran
| | - Samira Fadaoddini
- Department of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran, Iran
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24
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Kharkar PM, Rehmann MS, Skeens KM, Maverakis E, Kloxin AM. Thiol-ene click hydrogels for therapeutic delivery. ACS Biomater Sci Eng 2016; 2:165-179. [PMID: 28361125 PMCID: PMC5369354 DOI: 10.1021/acsbiomaterials.5b00420] [Citation(s) in RCA: 135] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Hydrogels are of growing interest for the delivery of therapeutics to specific sites in the body. For use as a delivery vehicle, hydrophilic precursors are usually laden with bioactive moieties and then directly injected to the site of interest for in situ gel formation and controlled release dictated by precursor design. Hydrogels formed by thiol-ene click reactions are attractive for local controlled release of therapeutics owing to their rapid reaction rate and efficiency under mild aqueous conditions, enabling in situ formation of gels with tunable properties often responsive to environmental cues. Herein, we will review the wide range of applications for thiol-ene hydrogels, from the prolonged release of anti-inflammatory drugs in the spine to the release of protein-based therapeutics in response to cell-secreted enzymes, with a focus on their clinical relevance. We will also provide a brief overview of thiol-ene click chemistry and discuss the available alkene chemistries pertinent to macromolecule functionalization and hydrogel formation. These chemistries include functional groups susceptible to Michael type reactions relevant for injection and radically-mediated reactions for greater temporal control of formation at sites of interest using light. Additionally, mechanisms for the encapsulation and controlled release of therapeutic cargoes are reviewed, including i) tuning the mesh size of the hydrogel initially and temporally for cargo entrapment and release and ii) covalent tethering of the cargo with degradable linkers or affinity binding sequences to mediate release. Finally, myriad thiol-ene hydrogels and their specific applications also are discussed to give a sampling of the current and future utilization of this chemistry for delivery of therapeutics, such as small molecule drugs, peptides, and biologics.
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Affiliation(s)
- Prathamesh M. Kharkar
- Department of Materials Science and Engineering, University of Delaware, 201 DuPont Hall, Newark, DE 19716, USA
| | - Matthew S. Rehmann
- Department of Chemical and Biomolecular Engineering, University of Delaware, 150 Academy Street, Newark, DE 19716, USA
| | - Kelsi M. Skeens
- Department of Chemical and Biomolecular Engineering, University of Delaware, 150 Academy Street, Newark, DE 19716, USA
| | - Emanual Maverakis
- Department of Dermatology, School of Medicine, University of California, Davis, 3301 C St, Suite 1400, Sacramento, CA 95816, USA
| | - April M. Kloxin
- Department of Materials Science and Engineering, University of Delaware, 201 DuPont Hall, Newark, DE 19716, USA
- Department of Chemical and Biomolecular Engineering, University of Delaware, 150 Academy Street, Newark, DE 19716, USA
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25
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26
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Kaga S, Gevrek TN, Sanyal A, Sanyal R. Synthesis and functionalization of dendron-polymer conjugate based hydrogels via sequential thiol-ene “click” reactions. ACTA ACUST UNITED AC 2015. [DOI: 10.1002/pola.27926] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Sadik Kaga
- Department of Chemistry; Bogazici University; Bebek 34342 Istanbul Turkey
| | - Tugce N. Gevrek
- Department of Chemistry; Bogazici University; Bebek 34342 Istanbul Turkey
| | - Amitav Sanyal
- Department of Chemistry; Bogazici University; Bebek 34342 Istanbul Turkey
- Bogazici University, Center for Life Sciences and Technologies; Istanbul Turkey
| | - Rana Sanyal
- Department of Chemistry; Bogazici University; Bebek 34342 Istanbul Turkey
- Bogazici University, Center for Life Sciences and Technologies; Istanbul Turkey
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27
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Hsu MN, Luo R, Kwek KZ, Por YC, Zhang Y, Chen CH. Sustained release of hydrophobic drugs by the microfluidic assembly of multistage microgel/poly (lactic-co-glycolic acid) nanoparticle composites. BIOMICROFLUIDICS 2015; 9:052601. [PMID: 25825623 PMCID: PMC4376756 DOI: 10.1063/1.4916230] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/25/2014] [Accepted: 03/04/2015] [Indexed: 05/05/2023]
Abstract
The poor solubility of many newly discovered drugs has resulted in numerous challenges for the time-controlled release of therapeutics. In this study, an advanced drug delivery platform to encapsulate and deliver hydrophobic drugs, consisting of poly (lactic-co-glycolic acid) (PLGA) nanoparticles incorporated within poly (ethylene glycol) (PEG) microgels, was developed. PLGA nanoparticles were used as the hydrophobic drug carrier, while the PEG matrix functioned to slow down the drug release. Encapsulation of the hydrophobic agents was characterized by fluorescence detection of the hydrophobic dye Nile Red within the microgels. In addition, the microcomposites prepared via the droplet-based microfluidic technology showed size tunability and a monodisperse size distribution, along with improved release kinetics of the loaded cargo compared with bare PLGA nanoparticles. This composite system has potential as a universal delivery platform for a variety of hydrophobic molecules.
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Affiliation(s)
| | - Rongcong Luo
- Department of Biomedical Engineering, National University of Singapore , Singapore 117575
| | - Kerwin Zeming Kwek
- Department of Biomedical Engineering, National University of Singapore , Singapore 117575
| | - Yong Chen Por
- Department of Plastic, Reconstructive and Aesthetic Surgery, KK Women's and Children's Hospital , Singapore 229899
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28
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Mongkhontreerat S, Andrén OCJ, Boujemaoui A, Malkoch M. Dendritic hydrogels: From exploring various crosslinking chemistries to introducing functions and naturally abundant resources. ACTA ACUST UNITED AC 2015. [DOI: 10.1002/pola.27750] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Surinthra Mongkhontreerat
- Department of Fibre and Polymer Technology; KTH Royal Institute of Technology; Teknikringen 56-58, SE-100 44 Stockholm Sweden
| | - Oliver C. J. Andrén
- Department of Fibre and Polymer Technology; KTH Royal Institute of Technology; Teknikringen 56-58, SE-100 44 Stockholm Sweden
| | - Assya Boujemaoui
- Department of Fibre and Polymer Technology; KTH Royal Institute of Technology; Teknikringen 56-58, SE-100 44 Stockholm Sweden
| | - Michael Malkoch
- Department of Fibre and Polymer Technology; KTH Royal Institute of Technology; Teknikringen 56-58, SE-100 44 Stockholm Sweden
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29
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Ma J, Lv L, Zou G, Zhang Q. Fluorescent porous film modified polymer optical fiber via "click" chemistry: stable dye dispersion and trace explosive detection. ACS APPLIED MATERIALS & INTERFACES 2015; 7:241-249. [PMID: 25487515 DOI: 10.1021/am505950c] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
In this paper, we report a facile strategy to fabricate fluorescent porous thin film on the surface of U-bent poly(methyl methacrylate) optical fiber (U-bent POF) in situ via "click" polymerization for vapor phase sensing of explosives. Upon irradiation of evanescent UV light transmitting within the fiber under ambient condition, a porous film (POSS-thiol cross-linking film, PTCF) is synthesized on the side surface of the fiber by a thiol-ene "click" reaction of vinyl-functionalized polyhedral oligomeric silsesquioxanes (POSS-V8) and alkane dithiols. When vinyl-functionalized porphyrin, containing four allyl substituents at the periphery, is added into precursors for the polymerization, fluorescence porphyrin can be covalently bonded into the cross-linked network of PTCF. This "fastened" way reduces the aggregation-induced fluorescence self-quenching of porphyrin and enhances the physicochemical stability of the porous film on the surface of U-bent POF. Fluorescent signals of the PTCF/U-bent POF probe made by this method exhibit high fluorescence quenching toward trace TNT and DNT vapor and the highest fluorescence quenching efficiency is observed for 1, 6-hexanedimercaptan-based film. In addition, because of the presence of POSS-V8 with multi cross-linkable groups, PTCF exhibits well-organized pore network and stable dye dispersion, which not only causes fast and sensitive fluorescence quenching against vapors of nitroaromatic compounds, but also provides a repeatability of the probing performance.
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Affiliation(s)
- Jiajun Ma
- CAS Key Laboratory of Soft Matter Chemistry, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Polymer Science and Engineering, Anhui Key Laboratory of Optoelectronic Science and Technology, University of Science and Technology of China , Hefei, Anhui 230026, China
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30
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Fabrication of poly(ethylene glycol)-based cyclodextrin containing hydrogels via thiol-ene click reaction. Eur Polym J 2015. [DOI: 10.1016/j.eurpolymj.2014.08.018] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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31
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Sawicki LA, Kloxin AM. Design of thiol-ene photoclick hydrogels using facile techniques for cell culture applications†Electronic supplementary information (ESI) available. See DOI: 10.1039/c4bm00187gClick here for additional data file. Biomater Sci 2014; 2:1612-1626. [PMID: 25717375 PMCID: PMC4324132 DOI: 10.1039/c4bm00187g] [Citation(s) in RCA: 86] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2014] [Accepted: 08/14/2014] [Indexed: 01/25/2023]
Abstract
Thiol-ene 'click' chemistries have been widely used in biomaterials applications, including drug delivery, tissue engineering, and controlled cell culture, owing to their rapid, cytocompatible, and often orthogonal reactivity. In particular, hydrogel-based biomaterials formed by photoinitiated thiol-ene reactions afford spatiotemporal control over the biochemical and biomechanical properties of the network for creating synthetic materials that mimic the extracellular matrix or enable controlled drug release. However, the use of charged peptides functionalized with cysteines, which can form disulfides prior to reaction, and vinyl monomers that require multistep syntheses and contain ester bonds, may lead to undesired inhomogeneity or degradation under cell culture conditions. Here, we designed a thiol-ene hydrogel formed by the reaction of allyloxycarbonyl-functionalized peptides and thiol-functionalized poly(ethylene glycol). Hydrogels were polymerized by free radical initiation under cytocompatible doses of long wavelength ultraviolet light in the presence of water-soluble photoinitiators (lithium acylphosphinate, LAP, and 2-hydroxy-1-[4-(2-hydroxyethoxy)phenyl]-2-methyl-1-propanone, Irgacure 2959). Mechanical properties of these hydrogels were controlled by varying the monomer concentration to mimic a range of soft tissue environments, and hydrogel stability in cell culture medium was observed over weeks. Patterns of biochemical cues were created within the hydrogels post-formation and confirmed through the incorporation of fluorescently-labeled peptides and Ellman's assay to detect free thiols. Human mesenchymal stem cells remained viable after encapsulation and subsequent photopatterning, demonstrating the utility of the monomers and hydrogels for three-dimensional cell culture. This facile approach enables the formation and characterization of hydrogels with well-defined, spatially-specific properties and expands the suite of monomers available for three-dimensional cell culture and other biological applications.
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Affiliation(s)
- Lisa A Sawicki
- Department of Chemical and Biomolecular Engineering , University of Delaware , Newark , DE 19716 , USA .
| | - April M Kloxin
- Department of Chemical and Biomolecular Engineering , University of Delaware , Newark , DE 19716 , USA . ; Department of Materials Science and Engineering , University of Delaware , Newark , DE 19716 , USA
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32
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An SY, Lee DG, Hwang JW, Kim KN, Nam JH, Jung HW, Noh SM, Oh JK. Photo-induced thiol-ene polysulfide-crosslinked materials with tunable thermal and mechanical properties. ACTA ACUST UNITED AC 2014. [DOI: 10.1002/pola.27353] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- So Young An
- Department of Chemistry and Biochemistry and Center for Nanoscience Research (CENR); Concordia University; Montreal Quebec Canada H4B 1R6
| | - Dong Geun Lee
- Department of Chemical and Biological Engineering; Korea University; Seoul 136-713 Republic of Korea
| | - Ji Won Hwang
- Department of Chemical and Biological Engineering; Korea University; Seoul 136-713 Republic of Korea
| | - Kyung Nam Kim
- PPG Industries Korea; Cheonan 330-912 Republic of Korea
| | - Joon Hyun Nam
- Research Center for Green Fine Chemicals; Korea Research Institute of Chemical Technology; Ulsan 681-310 Republic of Korea
| | - Hyun Wook Jung
- Department of Chemical and Biological Engineering; Korea University; Seoul 136-713 Republic of Korea
| | - Seung Man Noh
- Research Center for Green Fine Chemicals; Korea Research Institute of Chemical Technology; Ulsan 681-310 Republic of Korea
| | - Jung Kwon Oh
- Department of Chemistry and Biochemistry and Center for Nanoscience Research (CENR); Concordia University; Montreal Quebec Canada H4B 1R6
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33
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Zheng S, Shin JY, Song SY, Yu SJ, Suh H, Kim I. Hexafunctional poly(propylene glycol) based hydrogels for the removal of heavy metal ions. J Appl Polym Sci 2014. [DOI: 10.1002/app.40610] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Sudan Zheng
- BK21 PLUS Center for Advanced Chemical Technology Department of Polymer Science and Engineering; Pusan National University; Pusan 609-735 South Korea
| | - Jin Young Shin
- BK21 PLUS Center for Advanced Chemical Technology Department of Polymer Science and Engineering; Pusan National University; Pusan 609-735 South Korea
| | - Song Yi Song
- BK21 PLUS Center for Advanced Chemical Technology Department of Polymer Science and Engineering; Pusan National University; Pusan 609-735 South Korea
| | - Seong Jae Yu
- BK21 PLUS Center for Advanced Chemical Technology Department of Polymer Science and Engineering; Pusan National University; Pusan 609-735 South Korea
| | - Hongsuk Suh
- Department of Chemistry and Chemistry Institute for Functional Materials; Pusan National University; Pusan 609-735 South Korea
| | - Il Kim
- BK21 PLUS Center for Advanced Chemical Technology Department of Polymer Science and Engineering; Pusan National University; Pusan 609-735 South Korea
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34
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Olofsson K, Malkoch M, Hult A. Soft hydrogels from tetra-functional PEGs using UV-induced thiol–ene coupling chemistry: a structure-to-property study. RSC Adv 2014. [DOI: 10.1039/c4ra04335a] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
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35
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Beria L, Gevrek TN, Erdog A, Sanyal R, Pasini D, Sanyal A. ‘Clickable’ hydrogels for all: facile fabrication and functionalization. Biomater Sci 2014; 2:67-75. [DOI: 10.1039/c3bm60171d] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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36
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McRae Page S, Parelkar S, Gerasimenko A, Shin DY, Peyton SR, Emrick T. Promoting cell adhesion on slippery phosphorylcholine hydrogel surfaces. J Mater Chem B 2013; 2:620-624. [PMID: 32261278 DOI: 10.1039/c3tb21493a] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
The growing interest in regenerative medicine has created a need for superior polymer matrices that suit multiple physical, mechanical, and biological requirements. While the phospholipid bilayer of a cell membrane is considered optimal for interacting with biologics, polymeric materials composed of 2-methacryloyloxyethyl phosphorylcholine (MPC) offer a cell membrane-like synthetic alternative. In this work, thiol-containing phosphorylcholine polymers were synthesized by radical copolymerization of a lipoic acid-functionalized methacrylate with MPC. The canonical cell adhesion oligopeptide (GRGDS) was incorporated into the polymers by copolymerization of a GRGDS-containing methacrylamide prepared by solid phase peptide synthesis. The relative amounts of phosphorylcholine, lipoic acid and oligopeptide were controlled by the monomer feed ratios, and the polymers were characterized by NMR spectroscopy and aqueous gel permeation chromatography (GPC). These multifunctional polymers formed hydrogels rapidly (<10 minutes) by Michael addition when poly(ethylene glycol)diacrylate (PEGDA) was added at pH 9 - an initiator-free gelation performed in a completely aqueous environment. Two cell lines, live mouse skeletal muscle myoblasts (C2C12) and human ovarian cancer (SKOV3) cells, were observed to specifically attach, spread and proliferate only on hydrogels containing the GRGDS peptide sequence, with a notable dependence on peptide concentration. The remarkable hydrophilicity and biocompatibility attributed to polyMPC combined with the facile gelation conditions of these polymers affords a platform of new bio-cooperative materials suitable for cell studies.
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Affiliation(s)
- Samantha McRae Page
- Polymer Science & Engineering Department, University of Massachusetts Amherst, Amherst, MA 01003, USA.
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37
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An SY, Hwang JW, Kim KN, Jung HW, Noh SM, Oh JK. Multifunctional linear methacrylate copolymer polyenes having pendant vinyl groups: Synthesis and photoinduced thiol-ene crosslinking polyaddition. ACTA ACUST UNITED AC 2013. [DOI: 10.1002/pola.27035] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- So Young An
- Department of Chemistry and Biochemistry and Center for Nanoscience Research (CENR); Concordia University; Montreal Quebec Canada H4B 1R6
| | - Ji Won Hwang
- Department of Chemical and Biological Engineering; Korea University; Seoul 136-713 Republic of Korea
| | - Kyung Nam Kim
- PPG Industries Korea; Cheonan 330-912 Republic of Korea
| | - Hyun Wook Jung
- Department of Chemical and Biological Engineering; Korea University; Seoul 136-713 Republic of Korea
| | - Seung Man Noh
- Department of Chemical and Biological Engineering; Korea University; Seoul 136-713 Republic of Korea
- PPG Industries Korea; Cheonan 330-912 Republic of Korea
| | - Jung Kwon Oh
- Department of Chemistry and Biochemistry and Center for Nanoscience Research (CENR); Concordia University; Montreal Quebec Canada H4B 1R6
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38
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Zhang L, Jeong YI, Zheng S, Kang DH, Suh H, Kim I. Crosslinked Poly(ethylene glycol) Hydrogels with Degradable Phosphamide Linkers Used as a Drug Carrier in Cancer Therapy. Macromol Biosci 2013; 14:401-10. [DOI: 10.1002/mabi.201300327] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2013] [Revised: 09/16/2013] [Indexed: 01/01/2023]
Affiliation(s)
- Lidong Zhang
- BK21 PLUS Center for Advanced Chemical Technology, Department of Polymer Science and Engineering; Pusan National University Pusan; 609-735 Republic of Korea
| | - Young-Il Jeong
- National Research and Development Center for Hepatobiliary Cancer; Pusan National University Yangsan Hospital; Yangsan 626-870 Republic of Korea
| | - Sudan Zheng
- BK21 PLUS Center for Advanced Chemical Technology, Department of Polymer Science and Engineering; Pusan National University Pusan; 609-735 Republic of Korea
| | - Dae Hwan Kang
- National Research and Development Center for Hepatobiliary Cancer; Pusan National University Yangsan Hospital; Yangsan 626-870 Republic of Korea
| | - Hongsuk Suh
- Department of Chemistry and Chemistry Institute for Functional Materials; Pusan National University Pusan; 609-735 Republic of Korea
| | - Il Kim
- BK21 PLUS Center for Advanced Chemical Technology, Department of Polymer Science and Engineering; Pusan National University Pusan; 609-735 Republic of Korea
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39
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Olofsson K, Andrén OCJ, Malkoch M. Recent advances on crosslinked dendritic networks. J Appl Polym Sci 2013. [DOI: 10.1002/app.39876] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Kristina Olofsson
- KTH Royal Institute of Technology, School of Chemical Science and Engineering; Department of Fibre and Polymer Technology; Teknikringen. 56-58, SE-100 44 Stockholm Sweden
| | - Oliver C. J. Andrén
- KTH Royal Institute of Technology, School of Chemical Science and Engineering; Department of Fibre and Polymer Technology; Teknikringen. 56-58, SE-100 44 Stockholm Sweden
| | - Michael Malkoch
- KTH Royal Institute of Technology, School of Chemical Science and Engineering; Department of Fibre and Polymer Technology; Teknikringen. 56-58, SE-100 44 Stockholm Sweden
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40
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Kyburz KA, Anseth KS. Three-dimensional hMSC motility within peptide-functionalized PEG-based hydrogels of varying adhesivity and crosslinking density. Acta Biomater 2013; 9:6381-92. [PMID: 23376239 DOI: 10.1016/j.actbio.2013.01.026] [Citation(s) in RCA: 85] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2012] [Revised: 01/09/2013] [Accepted: 01/24/2013] [Indexed: 02/02/2023]
Abstract
Human mesenchymal stem cell (hMSC) migration and recruitment play a critical role during bone fracture healing. Within the complex three-dimensional (3-D) in vivo microenvironment, hMSC migration is regulated through a myriad of extracellular cues. Here, we use a thiol-ene photopolymerized hydrogel to recapitulate structural and bioactive inputs in a tunable manner to understand their role in regulating 3-D hMSC migration. Specifically, peptide-functionalized poly(ethylene glycol) hydrogels were used to encapsulate hMSC while varying the crosslinking density, from 0.18±0.02 to 1.60±0.04 mM, and the adhesive ligand density, from 0.001 to 1.0 mM. Using live-cell videomicroscopy, migratory cell paths were tracked and fitted to a Persistent Random Walk model. It was shown that hMSC migrating through the lowest crosslinking density and highest adhesivity had more sustained polarization, higher migrating speeds (17.6±0.9 μm h(-1)) and higher cell spreading (elliptical form factor=3.9±0.2). However, manipulation of these material properties did not significantly affect migration persistence. Further, there was a monotonic increase in cell speed and spreading with increasing adhesivity that showed a lack of the biphasic trend seen in 2-D cell migration. Immunohistochemistry showed well-formed actin fibers and β1 integrin staining at the ends of stress fibers. This thiol-ene platform provides a highly tunable substrate to characterize 3-D hMSC migration that can be applied as an implantable cell carrier platform or for the recruitment of endogenous hMSC in vivo.
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41
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Zhang Q, Hwang JW, Kim KN, Jung HW, Noh SM, Oh JK. New photo-induced thiol-ene crosslinked films based on linear methacrylate copolymer polythiols. ACTA ACUST UNITED AC 2013. [DOI: 10.1002/pola.26675] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Qian Zhang
- Department of Chemistry and Biochemistry and Center for Nanoscience Research (CENR); Concordia University; Montreal Quebec Canada H4B 1R6
| | - Ji Won Hwang
- Department of Chemical and Biological Engineering; Korea University; Seoul 136-713 Republic of Korea
| | - Kyung Nam Kim
- PPG Industries Korea; Cheonan 330-912 Republic of Korea
| | - Hyun Wook Jung
- Department of Chemical and Biological Engineering; Korea University; Seoul 136-713 Republic of Korea
| | - Seung Man Noh
- Department of Chemical and Biological Engineering; Korea University; Seoul 136-713 Republic of Korea
- PPG Industries Korea; Cheonan 330-912 Republic of Korea
| | - Jung Kwon Oh
- Department of Chemistry and Biochemistry and Center for Nanoscience Research (CENR); Concordia University; Montreal Quebec Canada H4B 1R6
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42
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Tibbitt MW, Kloxin AM, Sawicki L, Anseth KS. Mechanical Properties and Degradation of Chain and Step Polymerized Photodegradable Hydrogels. Macromolecules 2013; 46. [PMID: 24496435 PMCID: PMC3652617 DOI: 10.1021/ma302522x] [Citation(s) in RCA: 109] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
![]()
The relationship between polymeric
hydrogel microstructure and
macroscopic properties is of specific interest to the materials science
and polymer science communities for the rational design of materials
for targeted applications. Specifically, research has focused on elucidating
the role of network formation and connectivity on mechanical integrity
and degradation behavior. Here, we compared the mechanical properties
of chain- and step-polymerized, photodegradable hydrogels. Increased
ductility, tensile toughness, and shear strain to yield were observed
in step-polymerized hydrogels, as compared to the chain-polymerized
gels, indicating that increased homogeneity and network cooperativity
in the gel backbone improves mechanical integrity. Furthermore, the
ability to degrade the hydrogels in a controlled fashion with light
was exploited to explore how hydrogel microstructure influences photodegradation
and erosion. Here, the decreased network connectivity at the junction
points in the step-polymerized gels resulted in more rapid erosion.
Finally, a relationship between the reverse gelation threshold and
erosion rate was developed for the general class of photodegradable
hydrogels. In all, these studies further elucidate the relationship
between hydrogel formation and microarchitecture with macroscale behavior
to facilitate the future design of polymer networks and degradable
hydrogels, as well as photoresponsive materials such as cell culture
templates, drug delivery vehicles, responsive coatings, and anisotropic
materials.
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Affiliation(s)
- Mark W Tibbitt
- Department of Chemical and Biological Engineering, University of Colorado Boulder, Boulder, Colorado 80303 ; BioFrontiers Institute, University of Colorado Boulder, Boulder, Colorado 80303
| | - April M Kloxin
- Department of Chemical and Biological Engineering, University of Colorado Boulder, Boulder, Colorado 80303 ; Howard Hughes Medical Institute, University of Colorado Boulder, Boulder, Colorado 80303
| | - Lisa Sawicki
- Department of Chemical and Biological Engineering, University of Colorado Boulder, Boulder, Colorado 80303
| | - Kristi S Anseth
- Department of Chemical and Biological Engineering, University of Colorado Boulder, Boulder, Colorado 80303 ; Howard Hughes Medical Institute, University of Colorado Boulder, Boulder, Colorado 80303 ; BioFrontiers Institute, University of Colorado Boulder, Boulder, Colorado 80303
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Lundberg P, Lynd NA, Zhang Y, Zeng X, Krogstad DV, Paffen T, Malkoch M, Nyström AM, Hawker CJ. pH-triggered self-assembly of biocompatible histamine-functionalized triblock copolymers. SOFT MATTER 2013; 9:82-89. [PMID: 25866546 PMCID: PMC4389683 DOI: 10.1039/c2sm26996a] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Histamine functionalized poly(allyl glycidyl ether)-b-poly(ethylene glycol)-b-poly(allyl glycidyl ether) (PAGE-PEO-PAGE) triblock copolymers represent a new class of physically cross-linked, pH-responsive hydrogels with significant potential for biomedical applications. These telechelic triblock copolymers exhibited abrupt and reversible hydrogelation above pH 7.0 due to a hudrophilic/hydrophobic transition of the histamine units to form a network of hydrophobic domains bridged by a hydrophilic PEO matrix. These hydrophobic domains displayed improved ordering upon increasing pH and self-assembled into a body centered cubic lattice at pH 8.0, while at lower concentrations formed well-defined micelles. Significantly, all materials were found to be non-toxic when evaluated on three different cell lines and suggests a range of medical and biomedical applications.
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Affiliation(s)
- Pontus Lundberg
- Materials Research Laboratory, University of California, Santa Barbara, CA 93106, USA
| | - Nathaniel A Lynd
- Materials Research Laboratory, University of California, Santa Barbara, CA 93106, USA
| | - Yuning Zhang
- Swedish Medical Nanoscience Center, Department of Neuroscience, Karolinska Institutet, Retzius väg 8, Stockholm SE-171 77, Sweden
| | - Xianghui Zeng
- Swedish Medical Nanoscience Center, Department of Neuroscience, Karolinska Institutet, Retzius väg 8, Stockholm SE-171 77, Sweden
| | - Daniel V Krogstad
- Materials Research Laboratory, University of California, Santa Barbara, CA 93106, USA
| | - Tim Paffen
- Materials Research Laboratory, University of California, Santa Barbara, CA 93106, USA
| | - Michael Malkoch
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, School of Chemical Science and Engineering, Teknikringen 56-58, Stockholm SE-100 44, Sweden
| | - Andreas M Nyström
- Swedish Medical Nanoscience Center, Department of Neuroscience, Karolinska Institutet, Retzius väg 8, Stockholm SE-171 77, Sweden
| | - Craig J Hawker
- Materials Research Laboratory, University of California, Santa Barbara, CA 93106, USA ; Department of Chemistry and Biochemistry and Materials Department, University of California, Santa Barbara, CA 93106, USA
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44
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Zhang L, Jeong YI, Zheng S, Jang SI, Suh H, Kang DH, Kim I. Biocompatible and pH-sensitive PEG hydrogels with degradable phosphoester and phosphoamide linkers end-capped with amine for controlled drug delivery. Polym Chem 2013. [DOI: 10.1039/c2py20755a] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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45
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Lee A, Lundberg P, Klinger D, Lee BF, Hawker CJ, Lynd NA. Physiologically relevant, pH-responsive PEG-based block and statistical copolymers with N,N-diisopropylamine units. Polym Chem 2013; 4:5735-5742. [PMID: 25484931 PMCID: PMC4257845 DOI: 10.1039/c3py00747b] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In order to impart pH-responsiveness within a physiologically-relevant context to PEG-based biomaterials, a new tertiary amine containing repeat unit, N,N-diisopropyl ethanolamine glycidyl ether (DEGE), was developed and incorporated into statistical and block copolymers with ethylene oxide (EO), and allyl glycidyl ether (AGE) via anionic ring-opening polymerization. The reactivity of this novel monomeric building block in copolymerizations with EO was investigated by spectroscopy with observed reactivity ratios of rDEGE = 1.28 ± 0.14 and rEO = 0.82 ± 0.10. It was further demonstrated that DEGE containing copolymers could serve as building blocks for the formation of new pH-responsive materials with a pKa of ca. 9, which allowed macroscopic hydrogels to be prepared from symmetric triblock copolymers PDEGE5.3k-b-PEO20k-b-PDEGE5.3k. The triblock copolymers exhibited clear sol-to-gel transitions in a physiologically-relevant critical gelation range of pH 5.8-6.6 and pH-dependent viscoelastic properties. On the nanometer scale, the preparation of pH-responsive micro- or nanogels was demonstrated by crosslinking P(DEGE-co-AGE) copolymers in miniemulsion droplets stabilized by PEO-b-P(DEGE-co-AGE) diblock terpolymers. These nanoparticles exhibited a reversible pH-dependent swelling profile with a volume phase transition at physiological pH 6.5-7.5.
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Affiliation(s)
- Annabelle Lee
- Materials Research Laboratory, Department of Chemistry and Biochemistry, and the Materials Department, University of California, Santa Barbara, California 93106, USA
| | - Pontus Lundberg
- Materials Research Laboratory, Department of Chemistry and Biochemistry, and the Materials Department, University of California, Santa Barbara, California 93106, USA
| | - Daniel Klinger
- Materials Research Laboratory, Department of Chemistry and Biochemistry, and the Materials Department, University of California, Santa Barbara, California 93106, USA
| | - Bongjae F. Lee
- Materials Research Laboratory, Department of Chemistry and Biochemistry, and the Materials Department, University of California, Santa Barbara, California 93106, USA
| | - Craig J. Hawker
- Materials Research Laboratory, Department of Chemistry and Biochemistry, and the Materials Department, University of California, Santa Barbara, California 93106, USA
| | - Nathaniel A. Lynd
- Materials Research Laboratory, Department of Chemistry and Biochemistry, and the Materials Department, University of California, Santa Barbara, California 93106, USA
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46
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Kirchhof S, Brandl FP, Hammer N, Goepferich AM. Investigation of the Diels–Alder reaction as a cross-linking mechanism for degradable poly(ethylene glycol) based hydrogels. J Mater Chem B 2013; 1:4855-4864. [DOI: 10.1039/c3tb20831a] [Citation(s) in RCA: 81] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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47
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Hed Y, Öberg K, Berg S, Nordberg A, von Holst H, Malkoch M. Multipurpose heterofunctional dendritic scaffolds as crosslinkers towards functional soft hydrogels and implant adhesives in bone fracture applications. J Mater Chem B 2013; 1:6015-6019. [DOI: 10.1039/c3tb21061h] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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48
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Yang T, Malkoch M, Hult A. The influence of diffusion time on the properties of sequential interpenetrating PEG hydrogels. ACTA ACUST UNITED AC 2012. [DOI: 10.1002/pola.26506] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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49
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Yang T, Malkoch M, Hult A. Sequential interpenetrating poly(ethylene glycol) hydrogels prepared by UV-initiated thiol-ene coupling chemistry. ACTA ACUST UNITED AC 2012. [DOI: 10.1002/pola.26393] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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50
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Grover GN, Lam J, Nguyen TH, Segura T, Maynard HD. Biocompatible hydrogels by oxime Click chemistry. Biomacromolecules 2012; 13:3013-7. [PMID: 22970829 DOI: 10.1021/bm301346e] [Citation(s) in RCA: 163] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Oxime Click chemistry was used to form hydrogels that support cell adhesion. Eight-armed aminooxy poly(ethylene glycol) (PEG) was mixed with glutaraldehyde to form oxime-linked hydrogels. The mechanical properties, gelation kinetics, and water swelling ratios were studied and found to be tunable. It was also shown that gels containing the integrin ligand arginine-glycine-aspartic acid (RGD) supported mesenchymal stem cell (MSC) incorporation. High cell viability and proliferation of the encapsulated cells demonstrated biocompatibility of the material.
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Affiliation(s)
- Gregory N Grover
- Department of Chemistry and Biochemistry, University of California, Los Angeles, CA 90095, USA
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