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Hebner TS, Kirkpatrick BE, Fairbanks BD, Bowman CN, Anseth KS, Benoit DS. Radical-Mediated Degradation of Thiol-Maleimide Hydrogels. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2402191. [PMID: 38582514 PMCID: PMC11220706 DOI: 10.1002/advs.202402191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/29/2024] [Revised: 03/22/2024] [Indexed: 04/08/2024]
Abstract
Michael addition between thiol- and maleimide-functionalized molecules is a long-standing approach used for bioconjugation, hydrogel crosslinking, and the functionalization of other advanced materials. While the simplicity of this chemistry enables facile synthesis of hydrogels, network degradation is also desirable in many instances. Here, the susceptibility of thiol-maleimide bonds to radical-mediated degradation is reported. Irreversible degradation in crosslinked materials is demonstrated using photoinitiated and chemically initiated radicals in hydrogels and linear polymers. The extent of degradation is shown to be dependent on initiator concentration. Using a model linear polymer system, the radical-mediated mechanism of degradation is elucidated, in which the thiosuccinimide crosslink is converted to a succinimide and a new thioether formed with an initiator fragment. Using laser stereolithography, high-fidelity spatiotemporal control over degradation in crosslinked gels is demonstrated. Ultimately, this work establishes a platform for controllable, radical-mediated degradation in thiol-maleimide hydrogels, further expanding their versatility as functional materials.
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Affiliation(s)
- Tayler S. Hebner
- Department of BioengineeringUniversity of Oregon6231 University of OregonEugeneOR97403USA
| | - Bruce E. Kirkpatrick
- Department of Chemical and Biological EngineeringUniversity of Colorado Boulder596 UCBBoulderCO80309USA
- BioFrontiers InstituteUniversity of Colorado Boulder596 UCBBoulderCO80309USA
- BioFrontiers Institute Medical Scientist Training ProgramUniversity of Colorado Anschutz Medical Campus13001 East 17th PlaceAuroraCO80045USA
| | - Benjamin D. Fairbanks
- Department of Chemical and Biological EngineeringUniversity of Colorado Boulder596 UCBBoulderCO80309USA
| | - Christopher N. Bowman
- Department of Chemical and Biological EngineeringUniversity of Colorado Boulder596 UCBBoulderCO80309USA
| | - Kristi S. Anseth
- Department of Chemical and Biological EngineeringUniversity of Colorado Boulder596 UCBBoulderCO80309USA
- BioFrontiers InstituteUniversity of Colorado Boulder596 UCBBoulderCO80309USA
| | - Danielle S.W. Benoit
- Department of BioengineeringUniversity of Oregon6231 University of OregonEugeneOR97403USA
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2
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Fan Y, Lüchow M, Badria A, Hutchinson DJ, Malkoch M. Placenta Powder-Infused Thiol-Ene PEG Hydrogels as Potential Tissue Engineering Scaffolds. Biomacromolecules 2023; 24:1617-1626. [PMID: 36944137 PMCID: PMC10091351 DOI: 10.1021/acs.biomac.2c01355] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/23/2023]
Abstract
Human placenta is a source of extracellular matrix for tissue engineering. In this study, placenta powder (PP), made from decellularized human placenta, was physically incorporated into synthetic poly(ethylene glycol) (PEG)-based hydrogels via UV-initiated thiol-ene coupling (TEC). The PP-incorporated PEG hydrogels (MoDPEG+) showed tunable storage moduli ranging from 1080 ± 290 to 51,400 ± 200 Pa. The addition of PP (1, 4, or 8 wt %) within the PEG hydrogels increased the storage moduli, with the 8 wt % PP hydrogels showing the highest storage moduli. PP reduced the swelling ratios compared with the pristine hydrogels (MoDPEG). All hydrogels showed good biocompatibility in vitro toward human skin cells and murine macrophages, with cell viability above 91%. Importantly, cells could adhere and proliferate on MoDPEG+ hydrogels due to the bioactive PP, while MoDPEG hydrogels were bio-inert as cells moved away from the hydrogel or were distributed in a large cluster on the hydrogel surface. To showcase their potential use in application-driven research, the MoDPEG+ hydrogels were straightforwardly (i) 3D printed using the SLA technique and (ii) produced via high-energy visible light (HEV-TEC) to populate damaged soft-tissue or bone cavities. Taking advantage of the bioactivity of PP and the tunable physicochemical properties of the synthetic PEG hydrogels, the presented MoDPEG+ hydrogels show great promise for tissue regeneration.
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Affiliation(s)
- Yanmiao Fan
- Division of Coating Technology, Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56-58, 10044 Stockholm, Sweden
| | - Mads Lüchow
- Division of Coating Technology, Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56-58, 10044 Stockholm, Sweden
| | - Adel Badria
- Division of Coating Technology, Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56-58, 10044 Stockholm, Sweden
| | - Daniel J Hutchinson
- Division of Coating Technology, Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56-58, 10044 Stockholm, Sweden
| | - Michael Malkoch
- Division of Coating Technology, Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56-58, 10044 Stockholm, Sweden
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Nun N, Joy A. Fabrication and Bioactivity of Peptide-Conjugated Biomaterial Tissue Engineering Constructs. Macromol Rapid Commun 2023; 44:e2200342. [PMID: 35822458 DOI: 10.1002/marc.202200342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2022] [Revised: 06/22/2022] [Indexed: 01/11/2023]
Abstract
Tissue engineering combines materials engineering, cells and biochemical factors to improve, restore or replace various types of biological tissues. A nearly limitless combination of these strategies can be combined, providing a means to augment the function of a number of biological tissues such as skin tissue, neural tissue, bones, and cartilage. Compounds such as small molecule therapeutics, proteins, and even living cells have been incorporated into tissue engineering constructs to influence biological processes at the site of implantation. Peptides have been conjugated to tissue engineering constructs to circumvent limitations associated with conjugation of proteins or incorporation of cells. This review highlights various contemporary examples in which peptide conjugation is used to overcome the disadvantages associated with the inclusion of other bioactive compounds. This review covers several peptides that are commonly used in the literature as well as those that do not appear as frequently to provide a broad scope of the utility of the peptide conjugation technique for designing constructs capable of influencing the repair and regeneration of various bodily tissues. Additionally, a brief description of the construct fabrication techniques encountered in the covered examples and their advantages in various tissue engineering applications is provided.
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Affiliation(s)
- Nicholas Nun
- School of Polymer Science and Polymer Engineering, The University of Akron, Akron, OH, 44321, USA
| | - Abraham Joy
- School of Polymer Science and Polymer Engineering, The University of Akron, Akron, OH, 44321, USA
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Jing X, Fu H, Yu B, Sun M, Wang L. Two-photon polymerization for 3D biomedical scaffolds: Overview and updates. Front Bioeng Biotechnol 2022; 10:994355. [PMID: 36072288 PMCID: PMC9441635 DOI: 10.3389/fbioe.2022.994355] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Accepted: 07/29/2022] [Indexed: 01/23/2023] Open
Abstract
The needs for high-resolution, well-defined and complex 3D microstructures in diverse fields call for the rapid development of novel 3D microfabrication techniques. Among those, two-photon polymerization (TPP) attracted extensive attention owing to its unique and useful characteristics. As an approach to implementing additive manufacturing, TPP has truly 3D writing ability to fabricate artificially designed constructs with arbitrary geometry. The spatial resolution of the manufactured structures via TPP can exceed the diffraction limit. The 3D structures fabricated by TPP could properly mimic the microenvironment of natural extracellular matrix, providing powerful tools for the study of cell behavior. TPP can meet the requirements of manufacturing technique for 3D scaffolds (engineering cell culture matrices) used in cytobiology, tissue engineering and regenerative medicine. In this review, we demonstrated the development in 3D microfabrication techniques and we presented an overview of the applications of TPP as an advanced manufacturing technique in complex 3D biomedical scaffolds fabrication. Given this multidisciplinary field, we discussed the perspectives of physics, materials science, chemistry, biomedicine and mechanical engineering. Additionally, we dived into the principles of tow-photon absorption (TPA) and TPP, requirements of 3D biomedical scaffolders, developed-to-date materials and chemical approaches used by TPP and manufacturing strategies based on mechanical engineering. In the end, we draw out the limitations of TPP on 3D manufacturing for now along with some prospects of its future outlook towards the fabrication of 3D biomedical scaffolds.
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Affiliation(s)
- Xian Jing
- Key Laboratory of Micro/Nano and Ultra-precision Manufacturing, School of Mechatronic Engineering, Changchun University of Technology, Changchun, Jilin, China
| | - Hongxun Fu
- Key Laboratory of Micro/Nano and Ultra-precision Manufacturing, School of Mechatronic Engineering, Changchun University of Technology, Changchun, Jilin, China
| | - Baojun Yu
- Key Laboratory of Micro/Nano and Ultra-precision Manufacturing, School of Mechatronic Engineering, Changchun University of Technology, Changchun, Jilin, China
| | - Meiyan Sun
- College of Laboratory Medicine, Jilin Medical University, Jilin, China
| | - Liye Wang
- College of Pharmacy, University of Houston, Houston, TX, United States
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Li Z, Bratlie KM. Effect of RGD functionalization and stiffness of gellan gum hydrogels on macrophage polarization and function. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2021; 128:112303. [PMID: 34474854 DOI: 10.1016/j.msec.2021.112303] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 06/22/2021] [Accepted: 07/05/2021] [Indexed: 12/15/2022]
Abstract
Macrophages, the primary effector cells in the immune response, respond rapidly to the physical or chemical properties of biomaterial implants. Balanced macrophage polarization, phagocytosis, and migration would be beneficial for implant success and tissue regeneration. Here, we investigated macrophage phenotypic changes, phagocytosis, and migration in response to RGD functionalized surfaces and changes in stiffness of gellan gum hydrogels. We also inhibited the RhoA pathway. The compressive moduli ranged from ~5 to 30 kPa. Cell population and cell spreading area of classically activated macrophages (M(LPS)) and alternatively activated macrophages (M(IL-4)) are promoted on RGD modified hydrogel. ROCK inhibitor induced the opposite effect on the cell spreading of both M(LPS) and M(IL-4) macrophages on RGD modified hydrogels. Macrophage polarization was found to be stiffness-driven and regulated by the RGD motif and blocked by the RhoA pathway. RGD functionalized hydrogel shifted M(IL-4) cells toward a more pro-inflammatory phenotype, while ROCK inhibition shifted M(LPS) cells to a more anti-inflammatory phenotype. Both M(LPS) and M(IL-4) cells on untreated hydrogels shifted to a more pro-inflammatory phenotype in the presence of aminated-PS particles. The RGD motif had a significant impact on cellular uptake, whereas cellular uptake was stiffness driven on untreated hydrogels. Cell migration of M(LPS) and M(IL-4) cells had ROCK-dependent migration. The stiffness of gellan gum hydrogels had no influence on macrophage migration rate. Collectively, our results showed that gellan gum hydrogels can be used to direct immune response, macrophage infiltration, and phagocytosis.
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Affiliation(s)
- Zhuqing Li
- Department of Materials Science & Engineering, Iowa State University, Ames, IA 50011, USA
| | - Kaitlin M Bratlie
- Department of Materials Science & Engineering, Iowa State University, Ames, IA 50011, USA; Department of Chemical & Biological Engineering, Iowa State University, Ames, IA 50011, USA.
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6
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Maureira M, Cuadra F, Cádiz M, Torres M, Marttens AV, Covarrubias C. Preparation and osteogenic properties of nanocomposite hydrogel beads loaded with nanometric bioactive glass particles. Biomed Mater 2021; 16. [PMID: 34077913 DOI: 10.1088/1748-605x/ac0764] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Accepted: 06/02/2021] [Indexed: 12/30/2022]
Abstract
Bone reconstruction in the oral and maxillofacial region presents particular challenges related to the development of biomaterials with osteoinductive properties and suitable physical characteristics for their surgical use in irregular bony defects. In this work, the preparation and bioactivity of chitosan-gelatin (ChG) hydrogel beads loaded with either bioactive glass nanoparticles (nBG) or mesoporous bioactive glass nanospheres (nMBG) were studied.In vitrotesting of the bionanocomposite beads was carried out in simulated body fluid, and through viability and osteogenic differentiation assays using dental pulp stem cells (DPSCs).In vivobone regenerative properties of the biomaterials were assessed using a rat femoral defect model and compared with a traditional maxillary allograft (Puros®). ChG hydrogel beads containing homogeneously distributed BG nanoparticles promoted rapid bone-like apatite mineralization and induced the osteogenic differentiation of DPSCsin vitro. The bionanocomposite beads loaded with either nBG or nMBG also produced a greater bone tissue formationin vivoas compared to Puros® after 8 weeks of implantation. The osteoinductivity capacity of the bionanocomposite hydrogel beads coupled with their physical properties make them promissory for the reconstruction of irregular and less accessible maxillary bone defects.
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Affiliation(s)
- Miguel Maureira
- Laboratory of Nanobiomaterials, Research Institute of Dental Sciences, Faculty of Dentistry, Independencia, Santiago, Chile
| | - Felipe Cuadra
- Laboratory of Nanobiomaterials, Research Institute of Dental Sciences, Faculty of Dentistry, Independencia, Santiago, Chile
| | - Monserrat Cádiz
- Laboratory of Nanobiomaterials, Research Institute of Dental Sciences, Faculty of Dentistry, Independencia, Santiago, Chile
| | - Margarita Torres
- Laboratory of Nanobiomaterials, Research Institute of Dental Sciences, Faculty of Dentistry, Independencia, Santiago, Chile
| | - Alfredo von Marttens
- Department of Prosthesis, Faculty of Dentistry, University of Chile, Santiago, Chile
| | - Cristian Covarrubias
- Laboratory of Nanobiomaterials, Research Institute of Dental Sciences, Faculty of Dentistry, Independencia, Santiago, Chile
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Hang X, He S, Dong Z, Minnick G, Rosenbohm J, Chen Z, Yang R, Chang L. Nanosensors for single cell mechanical interrogation. Biosens Bioelectron 2021; 179:113086. [DOI: 10.1016/j.bios.2021.113086] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 02/07/2021] [Accepted: 02/09/2021] [Indexed: 02/08/2023]
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Widener AE, Bhatta M, Angelini TE, Phelps EA. Guest-host interlinked PEG-MAL granular hydrogels as an engineered cellular microenvironment. Biomater Sci 2021; 9:2480-2493. [PMID: 33432940 DOI: 10.1039/d0bm01499k] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
We report the development of a polyethylene glycol (PEG) hydrogel scaffold that provides the advantages of conventional bulk PEG hydrogels for engineering cellular microenvironments and allows for rapid cell migration. PEG microgels were used to assemble a densely packed granular system with an intrinsic interstitium-like negative space. In this material, guest-host molecular interactions provide reversible non-covalent linkages between discrete PEG microgel particles to form a cohesive bulk material. In guest-host chemistry, different guest molecules reversibly and non-covalently interact with their cyclic host molecules. Two species of PEG microgels were made, each with one functional group at the end of the four arm PEG-MAL functionalized using thiol click chemistry. The first was functionalized with the host molecule β-cyclodextrin, a cyclic oligosaccharide of repeating d-glucose units, and the other functionalized with the guest molecule adamantane. These two species provide a reversible guest-host interaction between microgel particles when mixed, generating an interlinked network with a percolated interstitium. We showed that this granular configuration, unlike conventional bulk PEG hydrogels, enabled the rapid migration of THP-1 monocyte cells. The guest-host microgels also exhibited shear-thinning behavior, providing a unique advantage over current bulk PEG hydrogels.
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Affiliation(s)
- Adrienne E Widener
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, FL, USA.
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9
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Abstract
Microvasculature functions at the tissue and cell level, regulating local mass exchange of oxygen and nutrient-rich blood. While there has been considerable success in the biofabrication of large- and small-vessel replacements, functional microvasculature has been particularly challenging to engineer due to its size and complexity. Recently, three-dimensional bioprinting has expanded the possibilities of fabricating sophisticated microvascular systems by enabling precise spatiotemporal placement of cells and biomaterials based on computer-aided design. However, there are still significant challenges facing the development of printable biomaterials that promote robust formation and controlled 3D organization of microvascular networks. This review provides a thorough examination and critical evaluation of contemporary biomaterials and their specific roles in bioprinting microvasculature. We first provide an overview of bioprinting methods and techniques that enable the fabrication of microvessels. We then offer an in-depth critical analysis on the use of hydrogel bioinks for printing microvascularized constructs within the framework of current bioprinting modalities. We end with a review of recent applications of bioprinted microvasculature for disease modeling, drug testing, and tissue engineering, and conclude with an outlook on the challenges facing the evolution of biomaterials design for bioprinting microvasculature with physiological complexity.
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Affiliation(s)
- Ryan W. Barrs
- Bioengineering Department, Clemson University, Clemson, SC 29634, USA
- Department of Regenerative Medicine and Cell Biology, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Jia Jia
- Bioengineering Department, Clemson University, Clemson, SC 29634, USA
- Department of Regenerative Medicine and Cell Biology, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Sophia E. Silver
- Bioengineering Department, Clemson University, Clemson, SC 29634, USA
- Department of Regenerative Medicine and Cell Biology, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Michael Yost
- Department of Surgery, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Ying Mei
- Bioengineering Department, Clemson University, Clemson, SC 29634, USA
- Department of Regenerative Medicine and Cell Biology, Medical University of South Carolina, Charleston, SC 29425, USA
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10
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Abstract
The specific microenvironment that cells reside in fundamentally impacts their broader function in tissues and organs. At its core, this microenvironment is composed of precise arrangements of cells that encourage homotypic and heterotypic cell-cell interactions, biochemical signaling through soluble factors like cytokines, hormones, and autocrine, endocrine, or paracrine secretions, and the local extracellular matrix (ECM) that provides physical support and mechanobiological stimuli, and further regulates biochemical signaling through cell-ECM interactions like adhesions and growth factor sequestering. Each cue provided in the microenvironment dictates cellular behavior and, thus, overall potential to perform tissue and organ specific function. It follows that in order to recapitulate physiological cell responses and develop constructs capable of replacing damaged tissue, we must engineer the cellular microenvironment very carefully. Many great strides have been made toward this goal using various three-dimensional (3D) tissue culture scaffolds and specific media conditions. Among the various 3D biomimetic scaffolds, synthetic hydrogels have emerged as a highly tunable and tissue-like biomaterial well-suited for implantable tissue-engineered constructs. Because many synthetic hydrogel materials are inherently bioinert, they minimize unintentional cell responses and thus are good candidates for long-term implantable grafts, patches, and organs. This review will provide an overview of commonly used biomaterials for forming synthetic hydrogels for tissue engineering applications and techniques for modifying them to with bioactive properties to elicit the desired cell responses.
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Affiliation(s)
- Asli Z Unal
- Department of Biomedical Engineering, Duke University, 101 Science Drive, Campus Box 90281, Durham, North Carolina 27708, United States
| | - Jennifer L West
- Department of Biomedical Engineering, Duke University, 101 Science Drive, Campus Box 90281, Durham, North Carolina 27708, United States
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Della Sala F, Biondi M, Guarnieri D, Borzacchiello A, Ambrosio L, Mayol L. Mechanical behavior of bioactive poly(ethylene glycol) diacrylate matrices for biomedical application. J Mech Behav Biomed Mater 2020; 110:103885. [PMID: 32957192 DOI: 10.1016/j.jmbbm.2020.103885] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Revised: 05/12/2020] [Accepted: 05/25/2020] [Indexed: 12/20/2022]
Abstract
The biomedical applications of physically entangled polymeric hydrogels are generally limited due to their weak mechanical properties, rapid swelling and dissolution in physiologically relevant environment. Chemical crosslinking helps stabilizing hydrogel structure and enhancing mechanical properties, thereby allowing a higher stability in phisiological environment. In this context, it is known that the mechanical properties of the hydrogel are affected by both the molecular weight (MW) of the starting polymer and the concentration of the crosslinker. Here, our aim was to assess the influence of polymer MW and concentration in the precursor solution on the mechanical features of the final hydrogel and their influence on cells-material interaction. In detail, 3D synthetic matrices based on poly(ethylene glycol) diacrylate (PEGDA) at two molecular weights (PEG 700 and PEG 3400) and at three different concentrations (10, 20, 40 w/v %), which were photopolymerized using darocour as an initiator, were studied. Then, infrared and swelling analyses, along with a comprehensive mechanical characterization of the obtained hydrogels (i.e. oscillatory shear and confined compression tests), were performed. Finally, to evaluate the influence of the mechanical features on the biological behaviour, the hydrogels were characterized in terms of cell adhesion percentage and cell viability after functionalizing the substrates with RGD peptide at three different concentrations. Results have demonstrated that both the Young's modulus (E) in compression and the elastic modulus (G') in shear of the hydrogels increase with increasing polymer precursor concentration. E decreased as MW increased, and the differences are more relevant for more concentrated hydrogels. On the contrary, G' appears to increase with increasing PEGDA MW and in particular for the lowest polymer precursor concentration. The biological results have demonstrated that cells cultured for longer times seem to prefer PEG 3400 hydrogels with a larger mesh size structure that posses higher viscoelastic properties in shear.
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Affiliation(s)
- Francesca Della Sala
- Istituto per i Polimeri, Compositi e Biomateriali, Consiglio Nazionale delle Ricerche (IPCB-CNR), Viale J.F. Kennedy 54, Napoli, Italy; University of Campania "Luigi Vanvitelli", Caserta, Italy
| | - Marco Biondi
- Dipartimento di Farmacia, Università di Napoli Federico II, Via Domenico Montesano 49, Napoli, Italy; Centro di Ricerca Interdipartimentale sui Biomateriali (CRIB), Università di Napoli Federico II, Piazzale Tecchio 80, Napoli, Italy
| | - Daniela Guarnieri
- Dipartimento di Chimica e Biologia A. Zambelli, Università di Salerno, via Giovanni Paolo II 132, Fisciano, Salerno, I-84084, Italy
| | - Assunta Borzacchiello
- Istituto per i Polimeri, Compositi e Biomateriali, Consiglio Nazionale delle Ricerche (IPCB-CNR), Viale J.F. Kennedy 54, Napoli, Italy.
| | - Luigi Ambrosio
- Istituto per i Polimeri, Compositi e Biomateriali, Consiglio Nazionale delle Ricerche (IPCB-CNR), Viale J.F. Kennedy 54, Napoli, Italy
| | - Laura Mayol
- Dipartimento di Farmacia, Università di Napoli Federico II, Via Domenico Montesano 49, Napoli, Italy; Centro di Ricerca Interdipartimentale sui Biomateriali (CRIB), Università di Napoli Federico II, Piazzale Tecchio 80, Napoli, Italy
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12
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Kim S, Fan J, Lee CS, Lee M. Dual Functional Lysozyme-Chitosan Conjugate for Tunable Degradation and Antibacterial Activity. ACS APPLIED BIO MATERIALS 2020; 3:2334-2343. [PMID: 32954226 DOI: 10.1021/acsabm.0c00087] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Hydrogels with controlled degradation and sustained bactericidal activities are promising biomaterial substrates to repair or regenerate the injured tissue. In this work, we present a unique pair of lysozyme and chitosan as a hydrogel that can promote cell growth and proliferation while concomitantly preventing infection during the gradual process of hydrogel degradation and tissue ingrowth. Lysozyme and chitosan containing cell adhesion motifs are chemically modified with photoreactive methacrylate moieties to obtain a crosslinked hydrogel network by visible light irradiation. The resulting lysozyme-chitosan conjugate successfully modulates the degradation rate of hydrogels while promoting cell adhesion, proliferation, and matrix formation with no cytotoxicity. The hydrogel also exerts an intrinsic antibacterial effect by combining antimicrobial features of chitosan and lysozyme. This work demonstrates an advanced hydrogel platform with dual function of tunable degradation and infection control for tissue engineering and wound healing applications.
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Affiliation(s)
- Soyon Kim
- Division of Advanced Prosthodontics, University of California, Los Angeles, USA
| | - Jiabing Fan
- Division of Advanced Prosthodontics, University of California, Los Angeles, USA
| | - Chung-Sung Lee
- Division of Advanced Prosthodontics, University of California, Los Angeles, USA
| | - Min Lee
- Division of Advanced Prosthodontics, University of California, Los Angeles, USA.,Department of Bioengineering, University of California, Los Angeles, USA
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13
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Galarza S, Kim H, Atay N, Peyton SR, Munson JM. 2D or 3D? How cell motility measurements are conserved across dimensions in vitro and translate in vivo. Bioeng Transl Med 2020; 5:e10148. [PMID: 31989037 PMCID: PMC6971446 DOI: 10.1002/btm2.10148] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Revised: 10/30/2019] [Accepted: 11/02/2019] [Indexed: 12/16/2022] Open
Abstract
Cell motility is a critical aspect of several processes, such as wound healing and immunity; however, it is dysregulated in cancer. Current limitations of imaging tools make it difficult to study cell migration in vivo. To overcome this, and to identify drivers from the microenvironment that regulate cell migration, bioengineers have developed 2D (two-dimensional) and 3D (three-dimensional) tissue model systems in which to study cell motility in vitro, with the aim of mimicking elements of the environments in which cells move in vivo. However, there has been no systematic study to explicitly relate and compare cell motility measurements between these geometries or systems. Here, we provide such analysis on our own data, as well as across data in existing literature to understand whether, and which, metrics are conserved across systems. To our surprise, only one metric of cell movement on 2D surfaces significantly and positively correlates with cell migration in 3D environments (percent migrating cells), and cell invasion in 3D has a weak, negative correlation with glioblastoma invasion in vivo. Finally, to compare across complex model systems, in vivo data, and data from different labs, we suggest that groups report an effect size, a statistical tool that is most translatable across experiments and labs, when conducting experiments that affect cellular motility.
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Affiliation(s)
- Sualyneth Galarza
- Department of Chemical EngineeringUniversity of Massachusetts AmherstAmherstMassachusetts
| | - Hyuna Kim
- Molecular and Cellular Biology ProgramUniversity of Massachusetts AmherstAmherstMassachusetts
| | - Naciye Atay
- Department of Biomedical Engineering and MechanicsVirginia Polytechnic Institute and State UniversityBlacksburgVirginia
| | - Shelly R. Peyton
- Department of Chemical EngineeringUniversity of Massachusetts AmherstAmherstMassachusetts
- Molecular and Cellular Biology ProgramUniversity of Massachusetts AmherstAmherstMassachusetts
| | - Jennifer M. Munson
- Department of Biomedical Engineering and MechanicsVirginia Polytechnic Institute and State UniversityBlacksburgVirginia
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14
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In vitro aged, hiPSC-origin engineered heart tissue models with age-dependent functional deterioration to study myocardial infarction. Acta Biomater 2019; 94:372-391. [PMID: 31146032 DOI: 10.1016/j.actbio.2019.05.064] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Revised: 05/20/2019] [Accepted: 05/24/2019] [Indexed: 01/29/2023]
Abstract
Deaths attributed to ischemic heart disease increased by 41.7% from 1990 to 2013. This is primarily due to an increase in the aged population, however, research on cardiovascular disease (CVD) has been overlooking aging, a well-documented contributor to CVD. The use of young animals is heavily preferred due to lower costs and ready availability, despite the prominent differences between young and aged heart structure and function. Here we present the first human induced pluripotent stem cell (hiPSC)-derived cardiomyocyte (iCM)-based, in vitro aged myocardial tissue model as an alternative research platform. Within 4 months, iCMs go through accelerated senescence and show cellular characteristics of aging. Furthermore, the model tissues fabricated using aged iCMs, with stiffness resembling that of aged human heart, show functional and pharmacological deterioration specific to aged myocardium. Our novel tissue model with age-appropriate physiology and pathology presents a promising new platform for investigating CVD or other age-related diseases. STATEMENT OF SIGNIFICANCE: In vitro and in vivo models of cardiovascular disease are aimed to provide crucial insight on the pathology and treatment of these diseases. However, the contribution of age-dependent cardiovascular changes is greatly underestimated through the use of young animals and premature cardiomyocytes. Here, we developed in vitro aged cardiac tissue models that mimic the aged heart tissue microenvironment and cellular phenotype and present the first evidence that age-appropriate in vitro disease models can be developed to gain more physiologically-relevant insight on development, progression, and amelioration of cardiovascular diseases.
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15
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Hopp I, MacGregor MN, Doherty K, Visalakshan RM, Vasilev K, Williams RL, Murray P. Plasma Polymer Coatings To Direct the Differentiation of Mouse Kidney-Derived Stem Cells into Podocyte and Proximal Tubule-like Cells. ACS Biomater Sci Eng 2019; 5:2834-2845. [PMID: 33405588 DOI: 10.1021/acsbiomaterials.9b00299] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Kidney disease is now recognized as a global health problem and is associated with increased morbidity and mortality, along with high economic costs. To develop new treatments for ameliorating kidney injury and preventing disease progression, there is a need for appropriate renal culture systems for screening novel drugs and investigating the cellular mechanisms underlying renal pathogenesis. There is a need for in vitro culture systems that promote the growth and differentiation of specialized renal cell types. In this work, we have used plasma polymerization technology to generate gradients of chemical functional groups to explore whether specific concentrations of these functional groups can direct the differentiation of mouse kidney-derived stem cells into specialized renal cell types. We found that amine-rich (-NH2) allylamine-based plasma-polymerized coatings could promote differentiation into podocyte-like cells, whereas methyl-rich (CH3) 1,7-octadiene-based coatings promoted differentiation into proximal tubule-like cells (PTC). Importantly, the PT-like cells generated on the substrates expressed the marker megalin and were able to endocytose albumin, indicating that the cells were functional.
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Affiliation(s)
- Isabel Hopp
- Institute of Translational Medicine, University of Liverpool, Crown Street, Liverpool L69 3GE, United Kingdom
| | - Melanie N MacGregor
- School of Engineering, Future Industries Institute, University of South Australia, Mawson Lakes Boulevard, Mawson Lakes, South Australia 5095, Australia
| | - Kyle Doherty
- Department of Eye and Vision Science, University of Liverpool, 6 West Derby Street, Liverpool L7 8TX, United Kingdom
| | - Rahul M Visalakshan
- School of Engineering, Future Industries Institute, University of South Australia, Mawson Lakes Boulevard, Mawson Lakes, South Australia 5095, Australia
| | - Krasimir Vasilev
- School of Engineering, Future Industries Institute, University of South Australia, Mawson Lakes Boulevard, Mawson Lakes, South Australia 5095, Australia
| | - Rachel L Williams
- Department of Eye and Vision Science, University of Liverpool, 6 West Derby Street, Liverpool L7 8TX, United Kingdom
| | - Patricia Murray
- Institute of Translational Medicine, University of Liverpool, Crown Street, Liverpool L69 3GE, United Kingdom
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16
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Taghavi S, Brissenden A, Amsden BG. High modulus, enzyme-degradable poly(trimethylene carbonate)-peptide biohybrid networks formed from triblock prepolymers. J Mater Chem B 2019; 7:2819-2828. [PMID: 32255084 DOI: 10.1039/c8tb02195c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Biohybrid networks have the potential to have stiffnesses equivalent to that of native soft connective tissues as well as cell-mediated degradation behavior. Most strategies to generate such materials to date have utilized crosslinking of two separate and orthogonally functionalized polymers. Herein we describe a triblock prepolymer consisting of a central enzyme degradable peptide block flanked by two synthetic, hydrolysis resistant poly(trimethylene carbonate) blocks (PTMC) or poly(ethylene glycol)-PTMC blocks terminated in methacrylate groups. To form these prepolymers heterobifunctional PTMC and PEG-PTMC were prepared, possessing a vinyl sulfone terminus and a methacrylate terminus. These polymers were conjugated to a di-cysteine containing peptide through a Michael-type addition to form cross-linkable prepolymers. These prepolymers were then photo-cured to form enzyme degradable networks. The compressive moduli of the resulting water swollen networks was within the range of many soft connective tissues and was inversely proportional to the water solubility of the prepolymers. The prepolymer water solubility in turn could be tuned by adjusting PTMC molecular weight or by the addition of a PEG block. In vitro degradation only occurred in the presence of matrix metalloproteinases, and was fastest for networks prepared with prepolymers of higher water solubility.
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Affiliation(s)
- Shadi Taghavi
- Department of Chemical Engineering and Human Mobility Research Centre, Queen's University, Kingston, ON, Canada.
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17
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Keating M, Lim M, Hu Q, Botvinick E. Selective stiffening of fibrin hydrogels with micron resolution via photocrosslinking. Acta Biomater 2019; 87:88-96. [PMID: 30660778 PMCID: PMC6684034 DOI: 10.1016/j.actbio.2019.01.034] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2018] [Revised: 12/24/2018] [Accepted: 01/14/2019] [Indexed: 12/13/2022]
Abstract
Fibrin hydrogels are used as a model system for studying cell-ECM biophysical interactions. Bulk mechanical stiffness of these hydrogels has been correlated to mechanotransduction and downstream signaling. However, stiffness values proximal to cells can vary by orders of magnitude at the length scale of microns. Patterning of matrix stiffness at this spatial scale can be useful in studying such interactions. Here we present and evaluate a technique to selectively stiffen defined regions within a fibrin hydrogel. Laser scanning illumination activates ruthenium-catalyzed crosslinking of fibrin tyrosine residues, resulting in tunable stiffness changes spanning distances as small as a few microns and a localized compaction of the material. As probed by active microrheology, stiffness increases by as much as 25X, similar to previously observed stiffness changes around single cells in 3D culture. In summary, our method allows for selective modification of fibrin stiffness at the micron scale with the potential to create complex patterns, which could be valuable for the investigation of mechanotransduction in a biologically meaningful way. STATEMENT OF SIGNIFICANCE: Fibrin hydrogels are used as a naturally derived model to study interactions between cells and their surrounding extracellular matrix (ECM). ECM stiffness influences cell state. Cells in 3D culture considerably modify the stiffness of their pericellular space, which can be quite heterogeneous at the micron-scale. Here we present and evaluate a method to pattern stiffness within fibrin hydrogels using a laser scanning confocal microscope and selective photo crosslinking. We believe that this technique can aid future studies of cell-ECM interactions by enabling researchers to modify the pericellular distribution of stiffness.
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Affiliation(s)
- Mark Keating
- Department of Biomedical Engineering, University of California, Irvine, CA 92697-2730, United States
| | - Micah Lim
- Department of Biomedical Engineering, University of California, Irvine, CA 92697-2730, United States
| | - Qingda Hu
- Department of Biomedical Engineering, University of California, Irvine, CA 92697-2730, United States; Center for Complex Biological Systems, University of California, Irvine, CA 92697-2280, United States
| | - Elliot Botvinick
- Department of Biomedical Engineering, University of California, Irvine, CA 92697-2730, United States; Center for Complex Biological Systems, University of California, Irvine, CA 92697-2280, United States; Department of Surgery, University of California, Irvine, CA 92697-2730, United States.
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18
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Bacha NC, Blandinieres A, Rossi E, Gendron N, Nevo N, Lecourt S, Guerin CL, Renard JM, Gaussem P, Angles-Cano E, Boulanger CM, Israel-Biet D, Smadja DM. Endothelial Microparticles are Associated to Pathogenesis of Idiopathic Pulmonary Fibrosis. Stem Cell Rev Rep 2018; 14:223-235. [PMID: 29101610 DOI: 10.1007/s12015-017-9778-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Idiopathic pulmonary fibrosis (IPF) is a devastating disease characterized by obliteration of alveolar architecture, resulting in declining lung function and ultimately death. Pathogenic mechanisms remain unclear but involve a concomitant accumulation of scar tissue together with myofibroblasts activation. Microparticles (MPs) have been investigated in several human lung diseases as possible pathogenic elements, prognosis markers and therapeutic targets. We postulated that levels and cellular origins of circulating MPs might serve as biomarkers in IPF patients and/or as active players of fibrogenesis. Flow cytometry analysis showed a higher level of Annexin-V positive endothelial and platelet MPs in 41 IPF patients compared to 22 healthy volunteers. Moreover, in IPF patients with a low diffusing capacity of the lung for carbon monoxide (DLCO<40%), endothelial MPs (EMPs) were found significantly higher compared to those with DLCO>40% (p = 0.02). We then used EMPs isolated from endothelial progenitor cells (ECFCs) extracted from IPF patients or controls to modulate normal human lung fibroblast (NHLF) properties. We showed that EMPs did not modify proliferation, collagen deposition and myofibroblast transdifferentiation. However, EMPs from IPF patients stimulated migration capacity of NHLF. We hypothesized that this effect could result from EMPs fibrinolytic properties and found indeed higher plasminogen activation potential in total circulating MPs and ECFCs derived MPs issued from IPF patients compared to those isolated from healthy controls MPs. Our study showed that IPF is associated with an increased level of EMPs in the most severe patients, highlighting an active process of endothelial activation in the latter. Endothelial microparticles might contribute to the lung fibroblast invasion mediated, at least in part, by a fibrinolytic activity.
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Affiliation(s)
- Nour C Bacha
- Inserm UMR-S1140, Paris, France.,Sorbonne Paris Cite, Université Paris Descartes, Paris, France
| | - Adeline Blandinieres
- Inserm UMR-S1140, Paris, France.,Sorbonne Paris Cite, Université Paris Descartes, Paris, France.,Hematology Department and UMR-S1140, AP-HP, European Hospital Georges Pompidou, 20 rue Leblanc, 75015, Paris, France
| | - Elisa Rossi
- Inserm UMR-S1140, Paris, France.,Sorbonne Paris Cite, Université Paris Descartes, Paris, France
| | - Nicolas Gendron
- Inserm UMR-S1140, Paris, France.,Sorbonne Paris Cite, Université Paris Descartes, Paris, France.,Hematology Department and UMR-S1140, AP-HP, European Hospital Georges Pompidou, 20 rue Leblanc, 75015, Paris, France
| | - Nathalie Nevo
- Inserm UMR-S1140, Paris, France.,Sorbonne Paris Cite, Université Paris Descartes, Paris, France
| | | | - Coralie L Guerin
- National Cytometry Platform, Department of Infection and Immunity, Luxembourg Institute of Health, Luxembourg, France
| | - Jean Marie Renard
- Sorbonne Paris Cite, Université Paris Descartes, Paris, France.,Inserm UMR-S970, PARCC, Paris, France
| | - Pascale Gaussem
- Inserm UMR-S1140, Paris, France.,Sorbonne Paris Cite, Université Paris Descartes, Paris, France.,Hematology Department and UMR-S1140, AP-HP, European Hospital Georges Pompidou, 20 rue Leblanc, 75015, Paris, France
| | - Eduardo Angles-Cano
- Inserm UMR-S1140, Paris, France.,Sorbonne Paris Cite, Université Paris Descartes, Paris, France
| | - Chantal M Boulanger
- Sorbonne Paris Cite, Université Paris Descartes, Paris, France.,Inserm UMR-S970, PARCC, Paris, France
| | - Dominique Israel-Biet
- Inserm UMR-S1140, Paris, France.,Sorbonne Paris Cite, Université Paris Descartes, Paris, France.,Pneumology Department, AP-HP, European Hospital Georges Pompidou, Paris, France
| | - David M Smadja
- Inserm UMR-S1140, Paris, France. .,Sorbonne Paris Cite, Université Paris Descartes, Paris, France. .,Hematology Department and UMR-S1140, AP-HP, European Hospital Georges Pompidou, 20 rue Leblanc, 75015, Paris, France.
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19
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Saroia J, Yanen W, Wei Q, Zhang K, Lu T, Zhang B. A review on biocompatibility nature of hydrogels with 3D printing techniques, tissue engineering application and its future prospective. Biodes Manuf 2018. [DOI: 10.1007/s42242-018-0029-7] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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20
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Smithmyer ME, Deng CC, Cassel SE, LeValley PJ, Sumerlin BS, Kloxin AM. Self-healing boronic acid-based hydrogels for 3D co-cultures. ACS Macro Lett 2018; 7:1105-1110. [PMID: 32832198 PMCID: PMC7437986 DOI: 10.1021/acsmacrolett.8b00462] [Citation(s) in RCA: 93] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Synthetic hydrogels have been widely adopted as well-defined matrices for three-dimensional (3D) cell culture, with increasing interest in systems that enable the co-culture of multiple cell types for probing both cell-matrix and cell-cell interactions in studies of tissue regeneration and disease. We hypothesized that the unique dynamic covalent chemistry of self-healing hydrogels could be harnessed for not only the encapsulation and culture of human cells but also the subsequent construction of layered hydrogels for 3D co-cultures. To test this, we formed hydrogels using boronic acid-functionalized polymers and demonstrated their self-healing in the presence of physiologically-relevant cell culture media. Two model human cell lines, MDA-MB-231 breast cancer cells and CCL151 pulmonary fibroblasts, were encapsulated within these dynamic materials, and good viability was observed over time. Finally, self-healing of cut hydrogel 'blocks' laden with these different cell types was used to create layered hydrogels for the generation of a dynamic co-culture system. This work demonstrates the utility of self-healing materials for multi-dimensional cultures and establishes approaches broadly useful for a variety of biological applications.
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Affiliation(s)
- Megan E. Smithmyer
- Department of Chemical and Biomolecular Engineering, Colburn Laboratory 150 Academy Street, University of Delaware, Newark, Delaware 19716, United States
| | - Christopher C. Deng
- George and Josephine Butler Polymer Research Laboratory, Center for Macromolecular Science and Engineering, Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, United States
| | - Samantha E. Cassel
- Department of Chemical and Biomolecular Engineering, Colburn Laboratory 150 Academy Street, University of Delaware, Newark, Delaware 19716, United States
| | - Paige J. LeValley
- Department of Chemical and Biomolecular Engineering, Colburn Laboratory 150 Academy Street, University of Delaware, Newark, Delaware 19716, United States
| | - Brent S. Sumerlin
- George and Josephine Butler Polymer Research Laboratory, Center for Macromolecular Science and Engineering, Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, United States
| | - April M. Kloxin
- Department of Chemical and Biomolecular Engineering, Colburn Laboratory 150 Academy Street, University of Delaware, Newark, Delaware 19716, United States
- Department of Materials Science and Engineering, DuPont Hall, University of Delaware, Newark, Delaware 19716, United States
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21
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Abstract
The conjugation of biomolecules can impart materials with the bioactivity necessary to modulate specific cell behaviors. While the biological roles of particular polypeptide, oligonucleotide, and glycan structures have been extensively reviewed, along with the influence of attachment on material structure and function, the key role played by the conjugation strategy in determining activity is often overlooked. In this review, we focus on the chemistry of biomolecule conjugation and provide a comprehensive overview of the key strategies for achieving controlled biomaterial functionalization. No universal method exists to provide optimal attachment, and here we will discuss both the relative advantages and disadvantages of each technique. In doing so, we highlight the importance of carefully considering the impact and suitability of a particular technique during biomaterial design.
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Affiliation(s)
- Christopher D. Spicer
- Department
of Medical Biochemistry and Biophysics, Karolinska Institutet, Scheeles Väg 2, Stockholm, Sweden
| | - E. Thomas Pashuck
- NJ
Centre for Biomaterials, Rutgers University, 145 Bevier Road, Piscataway, New Jersey United States
| | - Molly M. Stevens
- Department
of Medical Biochemistry and Biophysics, Karolinska Institutet, Scheeles Väg 2, Stockholm, Sweden
- Department
of Materials, Department of Bioengineering, and Institute of Biomedical Engineering, Imperial College London, Exhibition Road, London, United Kingdom
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22
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Taylor DA, Sampaio LC, Ferdous Z, Gobin AS, Taite LJ. Decellularized matrices in regenerative medicine. Acta Biomater 2018; 74:74-89. [PMID: 29702289 DOI: 10.1016/j.actbio.2018.04.044] [Citation(s) in RCA: 171] [Impact Index Per Article: 28.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Revised: 04/19/2018] [Accepted: 04/23/2018] [Indexed: 01/04/2023]
Abstract
Of all biologic matrices, decellularized extracellular matrix (dECM) has emerged as a promising tool used either alone or when combined with other biologics in the fields of tissue engineering or regenerative medicine - both preclinically and clinically. dECM provides a native cellular environment that combines its unique composition and architecture. It can be widely obtained from native organs of different species after being decellularized and is entitled to provide necessary cues to cells homing. In this review, the superiority of the macro- and micro-architecture of dECM is described as are methods by which these unique characteristics are being harnessed to aid in the repair and regeneration of organs and tissues. Finally, an overview of the state of research regarding the clinical use of different matrices and the common challenges faced in using dECM are provided, with possible solutions to help translate naturally derived dECM matrices into more robust clinical use. STATEMENT OF SIGNIFICANCE Ideal scaffolds mimic nature and provide an environment recognized by cells as proper. Biologically derived matrices can provide biological cues, such as sites for cell adhesion, in addition to the mechanical support provided by synthetic matrices. Decellularized extracellular matrix is the closest scaffold to nature, combining unique micro- and macro-architectural characteristics with an equally unique complex composition. The decellularization process preserves structural integrity, ensuring an intact vasculature. As this multifunctional structure can also induce cell differentiation and maturation, it could become the gold standard for scaffolds.
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23
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Bruggeman KF, Williams RJ, Nisbet DR. Dynamic and Responsive Growth Factor Delivery from Electrospun and Hydrogel Tissue Engineering Materials. Adv Healthc Mater 2018; 7. [PMID: 29193871 DOI: 10.1002/adhm.201700836] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2017] [Revised: 09/04/2017] [Indexed: 12/21/2022]
Abstract
Tissue engineering scaffolds are designed to mimic physical, chemical, and biological features of the extracellular matrix, thereby providing a constant support that is crucial to improved regenerative medicine outcomes. Beyond mechanical and structural support, the next generation of these materials must also consider the more dynamic presentation and delivery of drugs or growth factors to guide new and regenerating tissue development. These two aspects are explored expansively separately, but they must interact synergistically to achieve optimal regeneration. This review explores common tissue engineering materials types, electrospun polymers and hydrogels, and strategies used for incorporating drug delivery systems into these scaffolds.
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Affiliation(s)
- Kiara F. Bruggeman
- Laboratory of Advanced Biomaterials; Research School of Engineering; The Australian National University; Canberra ACT 2601 Australia
| | - Richard J. Williams
- School of Engineering; RMIT University; Melbourne VIC 3001 Australia
- Biofab3D; Aikenhead Center for Medical Discovery; St. Vincent's Hospital; Melbourne VIC 3065 Australia
| | - David R. Nisbet
- Laboratory of Advanced Biomaterials; Research School of Engineering; The Australian National University; Canberra ACT 2601 Australia
- Biofab3D; Aikenhead Center for Medical Discovery; St. Vincent's Hospital; Melbourne VIC 3065 Australia
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24
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Kim MS, Lee MH, Kwon BJ, Koo MA, Seon GM, Kim D, Hong SH, Park JC. Influence of Biomimetic Materials on Cell Migration. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 1064:93-107. [DOI: 10.1007/978-981-13-0445-3_6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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25
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Lim KS, Martens P, Poole-Warren L. Biosynthetic Hydrogels for Cell Encapsulation. SPRINGER SERIES IN BIOMATERIALS SCIENCE AND ENGINEERING 2018. [DOI: 10.1007/978-3-662-57511-6_1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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26
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Abstract
Hydrogels mimic many of the physical properties of soft tissue and are widely used biomaterials for tissue engineering and regenerative medicine. Synthetic hydrogels have been developed to recapitulate many of the healthy and diseased states of native tissues and can be used as a cell scaffold to study the effect of matricellular interactions in vitro. However, these matrices often fail to capture the dynamic and heterogenous nature of the in vivo environment, which varies spatially and during events such as development and disease. To address this deficiency, a variety of manufacturing and processing techniques are being adapted to the biomaterials setting. Among these, photochemistry is particularly well suited because these reactions can be performed in precise three-dimensional space and at specific moments in time. This spatiotemporal control over chemical reactions can also be performed over a range of cell- and tissue-relevant length scales with reactions that proceed efficiently and harmlessly at ambient conditions. This review will focus on the use of photochemical reactions to create dynamic hydrogel environments, and how these dynamic environments are being used to investigate and direct cell behavior.
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Affiliation(s)
- Tobin E Brown
- Department of Chemical and Biological Engineering, University of Colorado Boulder, USA.
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27
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Harnessing cell-material interaction to control cell fate: design principle of advanced functional hydrogel materials. J CHEM SCI 2017. [DOI: 10.1007/s12039-017-1387-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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28
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Abstract
Biomaterials that interface with biological systems are used to deliver drugs safely and efficiently; to prevent, detect, and treat disease; to assist the body as it heals; and to engineer functional tissues outside of the body for organ replacement. The field has evolved beyond selecting materials that were originally designed for other applications with a primary focus on properties that enabled restoration of function and mitigation of acute pathology. Biomaterials are now designed rationally with controlled structure and dynamic functionality to integrate with biological complexity and perform tailored, high-level functions in the body. The transition has been from permissive to promoting biomaterials that are no longer bioinert but bioactive. This perspective surveys recent developments in the field of polymeric and soft biomaterials with a specific emphasis on advances in nano- to macroscale control, static to dynamic functionality, and biocomplex materials.
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29
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Ma Y, Ji Y, Huang G, Ling K, Zhang X, Xu F. Bioprinting 3D cell-laden hydrogel microarray for screening human periodontal ligament stem cell response to extracellular matrix. Biofabrication 2015; 7:044105. [DOI: 10.1088/1758-5090/7/4/044105] [Citation(s) in RCA: 73] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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30
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Roam JL, Yan Y, Nguyen PK, Kinstlinger IS, Leuchter MK, Hunter DA, Wood MD, Elbert DL. A modular, plasmin-sensitive, clickable poly(ethylene glycol)-heparin-laminin microsphere system for establishing growth factor gradients in nerve guidance conduits. Biomaterials 2015; 72:112-24. [PMID: 26352518 DOI: 10.1016/j.biomaterials.2015.08.054] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2015] [Revised: 08/25/2015] [Accepted: 08/28/2015] [Indexed: 12/16/2022]
Abstract
Peripheral nerve regeneration is a complex problem that, despite many advancements and innovations, still has sub-optimal outcomes. Compared to biologically derived acellular nerve grafts and autografts, completely synthetic nerve guidance conduits (NGC), which allow for precise engineering of their properties, are promising but still far from optimal. We have developed an almost entirely synthetic NGC that allows control of soluble growth factor delivery kinetics, cell-initiated degradability and cell attachment. We have focused on the spatial patterning of glial-cell derived human neurotrophic factor (GDNF), which promotes motor axon extension. The base scaffolds consisted of heparin-containing poly(ethylene glycol) (PEG) microspheres. The modular microsphere format greatly simplifies the formation of concentration gradients of reversibly bound GDNF. To facilitate axon extension, we engineered the microspheres with tunable plasmin degradability. 'Click' cross-linking chemistries were also added to allow scaffold formation without risk of covalently coupling the growth factor to the scaffold. Cell adhesion was promoted by covalently bound laminin. GDNF that was released from these microspheres was confirmed to retain its activity. Graded scaffolds were formed inside silicone conduits using 3D-printed holders. The fully formed NGC's contained plasmin-degradable PEG/heparin scaffolds that developed linear gradients in reversibly bound GDNF. The NGC's were implanted into rats with severed sciatic nerves to confirm in vivo degradability and lack of a major foreign body response. The NGC's also promoted robust axonal regeneration into the conduit.
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Affiliation(s)
- Jacob L Roam
- Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, MO, USA
| | - Ying Yan
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Washington University School of Medicine, Campus Box 8238, 660 South Euclid Avenue, St. Louis, MO 63110, USA
| | - Peter K Nguyen
- Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, MO, USA
| | - Ian S Kinstlinger
- Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, MO, USA
| | - Michael K Leuchter
- Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, MO, USA
| | - Daniel A Hunter
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Washington University School of Medicine, Campus Box 8238, 660 South Euclid Avenue, St. Louis, MO 63110, USA
| | - Matthew D Wood
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Washington University School of Medicine, Campus Box 8238, 660 South Euclid Avenue, St. Louis, MO 63110, USA
| | - Donald L Elbert
- Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, MO, USA.
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31
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Tocchio A, Martello F, Tamplenizza M, Rossi E, Gerges I, Milani P, Lenardi C. RGD-mimetic poly(amidoamine) hydrogel for the fabrication of complex cell-laden micro constructs. Acta Biomater 2015; 18:144-54. [PMID: 25724444 DOI: 10.1016/j.actbio.2015.02.017] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2014] [Revised: 02/15/2015] [Accepted: 02/18/2015] [Indexed: 12/12/2022]
Abstract
The potential of the 3D cell culture approach for creating in vitro models for drug screening and cellular studies, has led to the development of hydrogels that are able to mimic the in vivo 3D cellular milieu. To this aim, synthetic polymer-based hydrogels, with which it is possible to fine-tune the chemical and biophysical properties of the cell microenvironment, are becoming more and more acclaimed. Of all synthetic materials, poly(amidoamine)s (PAAs) hydrogels are known to have promising properties. In particular, PAAs hydrogels containing the 2,2-bisacrylamidoacetic acid-agmatine monomeric unit are capable of enhancing cellular adhesion by interacting with the RGD-binding αVβ3 integrin. The synthesis of a new photocrosslinkable, biomimetic PAA-Jeffamine®-PAA triblock copolymer (PJP) hydrogel is reported in this paper with the aim of improving the optical, biocompatibility and cell-adhesion properties of previously studied PAA hydrogels and providing an inexpensive alternative to the RGD peptide based hydrogels. The physicochemical properties of PJP hydrogels are extensively discussed and the behavior of 2D and 3D cell cultures was analyzed in depth with different cell types. Moreover, cell-laden PJP hydrogels were patterned with perfusable microchannels and seeded with endothelial cells, in order to investigate the possibility of using PJP hydrogels for fabricating cell laden tissue-like micro constructs and microfluidic devices. Overall the data obtained suggest that PJP could ultimately become a useful tool for fabricating improved in vitro models in order to potentially enhance the effectiveness of drug screening and clinical treatments.
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Affiliation(s)
- Alessandro Tocchio
- SEMM, European School of Molecular Medicine, Campus IFOM-IEO, Via Adamello 16, 20139 Milano, Italy
| | | | | | - Eleonora Rossi
- SEMM, European School of Molecular Medicine, Campus IFOM-IEO, Via Adamello 16, 20139 Milano, Italy
| | - Irini Gerges
- Fondazione Filarete, Viale Ortles 22/4, 20139 Milano, Italy
| | - Paolo Milani
- Fondazione Filarete, Viale Ortles 22/4, 20139 Milano, Italy; CIMaINa, Dipartimento di Fisica, Università degli Studi di Milano, Via Celoria 16, 20133 Milano, Italy
| | - Cristina Lenardi
- Fondazione Filarete, Viale Ortles 22/4, 20139 Milano, Italy; CIMaINa, Dipartimento di Fisica, Università degli Studi di Milano, Via Celoria 16, 20133 Milano, Italy.
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32
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Fahham D, Merquiol E, Gilon T, Marx G, Blum G. Insoluble fibrinogen particles for harvesting and expanding attachment-dependent cells and for trapping suspended cancer cells in the presence of blood. ACTA ACUST UNITED AC 2015; 10:025010. [PMID: 25886560 DOI: 10.1088/1748-6041/10/2/025010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Fibrinogen has the potential of being used as a material to harvest and grow normal mesenchymal cells (fibroblasts, endothelial cells) or to trap cancer cells from a suspension with blood as a potential circulatory trap.Insoluble fibrinogen particles (iFP) were prepared from commercial Cohn fraction I paste (source: Kedrion). The sized iFP (~60-180 µm) were not soluble in physiologic buffers, exhibited a density of 1.2 ± 0.02, and did not aggregate or clump when mixed with whole blood or thrombin, but were degraded in lytic solutions.Cell culture studies indicated that the iFP could be used to harvest, expand and transfer normal, mammalian, attachment-dependent cells, notably fibroblasts and stem cells from bone marrow, as well as numerous cancer lines. Cells attached to iFP underwent logarithmic growth kinetics and could be transferred without trypsinization. Transplanted cancer cells-on-iFP generated characteristic tumors and retained their surface marker (by Western immuno-blot). An iFP 'cell-affinity' batch column was shown to trap MCF-7 cancer cells in the presence of red blood cells (RBCs) or serum.The scalable process for fabricating iFP retained the cell attachment properties of native fibrinogen. The results indicate that iFP has the potential to be used as a 3D cell culture matrix, and possibly to trap cancer cells from blood.
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Affiliation(s)
- Duha Fahham
- Institute of Drug Research, School of Pharmacy, Faculty of Medicine, Hebrew University, Jerusalem, Israel. These authors contributed equally to this manuscript
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33
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Schweller RM, West JL. Encoding Hydrogel Mechanics via Network Cross-Linking Structure. ACS Biomater Sci Eng 2015; 1:335-344. [PMID: 26082943 PMCID: PMC4462992 DOI: 10.1021/acsbiomaterials.5b00064] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2015] [Accepted: 04/07/2015] [Indexed: 12/12/2022]
Abstract
![]()
The
effects of mechanical cues on cell behaviors in 3D remain difficult
to characterize as the ability to tune hydrogel mechanics often requires
changes in the polymer density, potentially altering the material’s
biochemical and physical characteristics. Additionally, with most
PEG diacrylate (PEGDA) hydrogels, forming materials with compressive
moduli less than ∼10 kPa has been virtually impossible. Here,
we present a new method of controlling the mechanical properties of
PEGDA hydrogels independent of polymer chain density through the incorporation
of additional vinyl group moieties that interfere with the cross-linking
of the network. This modification can tune hydrogel mechanics in a
concentration dependent manner from <1 to 17 kPa, a more physiologically
relevant range than previously possible with PEG-based hydrogels,
without altering the hydrogel’s degradation and permeability.
Across this range of mechanical properties, endothelial cells (ECs)
encapsulated within MMP-2/MMP-9 degradable hydrogels with RGDS adhesive
peptides revealed increased cell spreading as hydrogel stiffness decreased
in contrast to behavior typically observed for cells on 2D surfaces.
EC-pericyte cocultures exhibited vessel-like networks within 3 days
in highly compliant hydrogels as compared to a week in stiffer hydrogels.
These vessel networks persisted for at least 4 weeks and deposited
laminin and collagen IV perivascularly. These results indicate that
EC morphogenesis can be regulated using mechanical cues in 3D. Furthermore,
controlling hydrogel compliance independent of density allows for
the attainment of highly compliant mechanical regimes in materials
that can act as customizable cell microenvironments.
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Affiliation(s)
- Ryan M Schweller
- Department of Biomedical Engineering, Duke University , Room 136 Hudson Hall, Durham, North Carolina 27708, United States
| | - Jennifer L West
- Department of Biomedical Engineering, Duke University , Room 136 Hudson Hall, Durham, North Carolina 27708, United States
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34
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Kim BJ, Zhao S, Bunaciu RP, Yen A, Wu M. A 3D in situ cell counter reveals that breast tumor cell (MDA-MB-231) proliferation rate is reduced by the collagen matrix density. Biotechnol Prog 2015; 31:990-996. [PMID: 25683564 DOI: 10.1002/btpr.2062] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2014] [Revised: 01/15/2015] [Indexed: 11/08/2022]
Abstract
Many cell types require the biophysical and biochemical cues within the 3D extracellular matrix (ECM) to exhibit their true physiologically relevant behavior. As a result, cell culture platforms have been evolving from traditional 2D petridish plates into 3D biomatrices, and there is a need for developing analytic tools to characterize 3D cell culture. The existing cell counting method, using a hemocytometer or coulter counter, requires that cells are suspended in fluids prior to counting. This poses a challenge for 3D cell culture as cells are embedded in a 3D biomatrix. We use a facile 3D cell counting method that overcomes this limitation and allows for in situ cell counting in a 3D cell culture using equipment that is commonly available in a biology lab. Using a breast tumor cell line, MDA-MB-231, as a model system, we demonstrated that MDA-MB-231 cells (1) grow slower within a 3D collagen matrix than on a 2D substrate for an extended growth time (a week) with a comparable, initial cell-to-cell distance, (2) their cell growth rate decreases with the increase of collagen concentration, showing a linear growth rate rather than an exponential growth rate. Further work using flow cytometry showed that the observed growth rate reduction was consistent with the retardation of the transition to S (synthesis) phase in the cell cycle. This work demonstrates the validity of the 3D cell counting method and the importance of cell-ECM interactions in cell proliferation.
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Affiliation(s)
- Beum Jun Kim
- Dept. of Biological and Environmental Engineering, Cornell University, Ithaca, NY 14853
| | - Shuting Zhao
- Dept. of Biological and Environmental Engineering, Cornell University, Ithaca, NY 14853
| | - Rodica P Bunaciu
- Dept. of Biomedical Sciences, Cornell University, Ithaca, NY 14853
| | - Andrew Yen
- Dept. of Biomedical Sciences, Cornell University, Ithaca, NY 14853
| | - Mingming Wu
- Dept. of Biological and Environmental Engineering, Cornell University, Ithaca, NY 14853
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35
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Smith RJ, Koobatian MT, Shahini A, Swartz DD, Andreadis ST. Capture of endothelial cells under flow using immobilized vascular endothelial growth factor. Biomaterials 2015; 51:303-312. [PMID: 25771020 PMCID: PMC4361797 DOI: 10.1016/j.biomaterials.2015.02.025] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2014] [Revised: 01/27/2015] [Accepted: 02/01/2015] [Indexed: 02/09/2023]
Abstract
We demonstrate the ability of immobilized vascular endothelial growth factor (VEGF) to capture endothelial cells (EC) with high specificity under fluid flow. To this end, we engineered a surface consisting of heparin bound to poly-L-lysine to permit immobilization of VEGF through the C-terminal heparin-binding domain. The immobilized growth factor retained its biological activity as shown by proliferation of EC and prolonged activation of KDR signaling. Using a microfluidic device we assessed the ability to capture EC under a range of shear stresses from low (0.5 dyne/cm2) to physiological (15 dyne/cm2). Capture was significant for all shear stresses tested. Immobilized VEGF was highly selective for EC as evidenced by significant capture of human umbilical vein and ovine pulmonary artery EC but no capture of human dermal fibroblasts, human hair follicle derived mesenchymal stem cells, or mouse fibroblasts. Further, VEGF could capture EC from mixtures with non-EC under low and high shear conditions as well as from complex fluids like whole human blood under high shear. Our findings may have far reaching implications, as they suggest that VEGF could be used to promote endothelialization of vascular grafts or neovascularization of implanted tissues by rare but continuously circulating EC.
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Affiliation(s)
- Randall J Smith
- Department of Biomedical Engineering, University at Buffalo, State University of New York, Amherst, NY 14260-4200, USA
| | - Maxwell T Koobatian
- Department of Physiology and Biophysics, University at Buffalo, State University of New York, Amherst, NY 14260-4200, USA
| | - Aref Shahini
- Department of Chemical and Biological Engineering, University at Buffalo, State University of New York, Amherst, NY 14260-4200, USA
| | - Daniel D Swartz
- Department of Physiology and Biophysics, University at Buffalo, State University of New York, Amherst, NY 14260-4200, USA; Department of Pediatrics, Women and Children's Hospital of Buffalo, University at Buffalo, State University of New York, Amherst, NY 14260-4200, USA; Center of Excellence in Bioinformatics and Life Sciences, University at Buffalo, State University of New York, Amherst, NY 14260-4200, USA
| | - Stelios T Andreadis
- Department of Chemical and Biological Engineering, University at Buffalo, State University of New York, Amherst, NY 14260-4200, USA; Department of Biomedical Engineering, University at Buffalo, State University of New York, Amherst, NY 14260-4200, USA; Center of Excellence in Bioinformatics and Life Sciences, University at Buffalo, State University of New York, Amherst, NY 14260-4200, USA.
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36
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Fonseca KB, Granja PL, Barrias CC. Engineering proteolytically-degradable artificial extracellular matrices. Prog Polym Sci 2014. [DOI: 10.1016/j.progpolymsci.2014.07.003] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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37
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Lin L, Marchant RE, Zhu J, Kottke-Marchant K. Extracellular matrix-mimetic poly(ethylene glycol) hydrogels engineered to regulate smooth muscle cell proliferation in 3-D. Acta Biomater 2014; 10:5106-5115. [PMID: 25173839 DOI: 10.1016/j.actbio.2014.08.025] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2014] [Revised: 07/22/2014] [Accepted: 08/22/2014] [Indexed: 12/13/2022]
Abstract
The goal of this project is to engineer a defined, synthetic poly(ethylene glycol) (PEG) hydrogel as a model system to investigate smooth muscle cell (SMC) proliferation in three-dimensions (3-D). To mimic the properties of extracellular matrix, both cell-adhesive peptide (GRGDSP) and matrix metalloproteinase (MMP) sensitive peptide (VPMSMRGG or GPQGIAGQ) were incorporated into the PEG macromer chain. Copolymerization of the biomimetic macromers results in the formation of bioactive hydrogels with the dual properties of cell adhesion and proteolytic degradation. Using these biomimetic scaffolds, the authors studied the effect of scaffold properties, including RGD concentration, MMP sensitivity, and network crosslinking density, as well as heparin as an exogenous factor on 3-D SMC proliferation. The results indicated that the incorporation of cell-adhesive ligand significantly enhanced SMC spreading and proliferation, with cell-adhesive ligand concentration mediating 3-D SMC proliferation in a biphasic manner. The faster degrading hydrogels promoted SMC proliferation and spreading. In addition, 3-D SMC proliferation was inhibited by increasing network crosslinking density and exogenous heparin treatment. These constructs are a good model system for studying the effect of hydrogel properties on SMC functions and show promise as a tissue engineering platform for vascular in vivo applications.
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Affiliation(s)
- Lin Lin
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH 44106, USA
| | - Roger E Marchant
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH 44106, USA
| | - Junmin Zhu
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH 44106, USA
| | - Kandice Kottke-Marchant
- Robert J. Tomsich Pathology and Laboratory Medicine Institute, Cleveland Clinic, 9500 Euclid Avenue, L21, Cleveland, OH 44195, USA.
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38
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Tsurkan MV, Chwalek K, Schoder M, Freudenberg U, Werner C. Chemoselective peptide functionalization of starPEG-GAG hydrogels. Bioconjug Chem 2014; 25:1942-50. [PMID: 25297697 DOI: 10.1021/bc500217z] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Glycosaminoglycan (GAG)-based hydrogels gain increasing interest in regenerative therapies. To support specific applications, the biomolecular functionality of gel matrices needs to be customized via conjugation of peptide sequences that mediate cell adhesion, expansion and differentiation. Herein, we present an orthogonal strategy for the formation and chemoselective functionalization of starPEG-GAG hydrogels, utilizing the uniform and specific conjugation of peptides and GAGs for customizing the resulting materials. The introduced approach was applied for the incorporation of three different types of RGD peptides to analyze the influence of peptide sequence and conformation on adhesion and morphogenesis of endothelial cells (ECs) grown on the peptide-containing starPEG-GAG hydrogels. The strongest cellular response was observed for hydrogels functionalized with cycloRGD followed by linear forms of RGDSP and RGD, showing that morphogenesis and growth rate of ECs is controlled by both type and quantity of the conjugated peptides.
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Affiliation(s)
- Mikhail V Tsurkan
- Leibniz-Institut für Polymerforschung Dresden e.V. , Max Bergmann Center of Biomaterials Dresden, Hohe Str. 6, 01069 Dresden, Germany
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39
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Peak CW, Nagar S, Watts RD, Schmidt G. Robust and Degradable Hydrogels from Poly(ethylene glycol) and Semi-Interpenetrating Collagen. Macromolecules 2014. [DOI: 10.1021/ma500972y] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Charles W. Peak
- Weldon School of Biomedical
Engineering, Purdue University, 206 South Martin Jischke Drive, West Lafayette, Indiana 47907, United States
| | - Saumya Nagar
- Weldon School of Biomedical
Engineering, Purdue University, 206 South Martin Jischke Drive, West Lafayette, Indiana 47907, United States
| | - Ryan D. Watts
- Weldon School of Biomedical
Engineering, Purdue University, 206 South Martin Jischke Drive, West Lafayette, Indiana 47907, United States
| | - Gudrun Schmidt
- Weldon School of Biomedical
Engineering, Purdue University, 206 South Martin Jischke Drive, West Lafayette, Indiana 47907, United States
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40
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Fu HL, Hong Y, Little SR, Wagner WR. Collagenase-Labile Polyurethane Urea Synthesis and Processing into Hollow Fiber Membranes. Biomacromolecules 2014; 15:2924-32. [DOI: 10.1021/bm500552f] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hui-Li Fu
- McGowan Institute for Regenerative Medicine, ‡Department of Surgery, §Department of Chemical & Petroleum Engineering, and ∥Department of Bioengineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15219, United States
| | - Yi Hong
- McGowan Institute for Regenerative Medicine, ‡Department of Surgery, §Department of Chemical & Petroleum Engineering, and ∥Department of Bioengineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15219, United States
| | - Steven R. Little
- McGowan Institute for Regenerative Medicine, ‡Department of Surgery, §Department of Chemical & Petroleum Engineering, and ∥Department of Bioengineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15219, United States
| | - William R. Wagner
- McGowan Institute for Regenerative Medicine, ‡Department of Surgery, §Department of Chemical & Petroleum Engineering, and ∥Department of Bioengineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15219, United States
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41
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Abstract
The development of hydrogel-based biomaterials represents a promising approach to generating new strategies for tissue engineering and regenerative medicine. In order to develop more sophisticated cell-seeded hydrogel constructs, it is important to understand how cells mechanically interact with hydrogels. In this paper, we review the mechanisms by which cells remodel hydrogels, the influence that the hydrogel mechanical and structural properties have on cell behaviour and the role of mechanical stimulation in cell-seeded hydrogels. Cell-mediated remodelling of hydrogels is directed by several cellular processes, including adhesion, migration, contraction, degradation and extracellular matrix deposition. Variations in hydrogel stiffness, density, composition, orientation and viscoelastic characteristics all affect cell activity and phenotype. The application of mechanical force on cells encapsulated in hydrogels can also instigate changes in cell behaviour. By improving our understanding of cell-material mechano-interactions in hydrogels, this should enable a new generation of regenerative medical therapies to be developed.
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Affiliation(s)
- Mark Ahearne
- Trinity Centre for Bioengineering , Trinity Biomedical Sciences Institute, Trinity College Dublin , Dublin 2 , Ireland ; Department of Mechanical and Manufacturing Engineering, School of Engineering , Trinity College Dublin , Dublin , Ireland
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42
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Lin L, Zhu J, Kottke-Marchant K, Marchant RE. Biomimetic-engineered poly (ethylene glycol) hydrogel for smooth muscle cell migration. Tissue Eng Part A 2014; 20:864-73. [PMID: 24093717 DOI: 10.1089/ten.tea.2013.0050] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
We report on a biomimetic scaffold as a model system to evaluate smooth muscle cell (SMC) migration in three dimensions. To accomplish this, bio-inert poly (ethylene glycol) (PEG)-based hydrogels were designed as the scaffold substrate. To mimic properties of the extracellular matrix, cell-adhesive peptide (GRGDSP) derived from fibronectin and collagenase-sensitive peptide (GPQGIAGQ) derived from collagen type I were incorporated into the PEG macromer chain. Copolymerization of the biomimetic macromers results in the formation of bioactive PEG hydrogels with cell adhesivity and biodegradability. By utilizing these biomimetic scaffolds, we studied the effect of adhesive ligand concentration, proteolysis, and network cross-linking density on cell migration. Our results showed that three-dimensional SMC migration has a biphasic dependence on adhesive ligand density, and both adhesive and collagenase-sensitive peptides were required for cell migration to occur. Furthermore, network cross-linking density was shown to dramatically influence the behavior of cell migration in the hydrogels.
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Affiliation(s)
- Lin Lin
- 1 Department of Biomedical Engineering, Case Western Reserve University , Cleveland, Ohio
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43
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Castelletto V, Gouveia RJ, Connon CJ, Hamley IW, Seitsonen J, Ruokolainen J, Longo E, Siligardi G. Influence of elastase on alanine-rich peptide hydrogels. Biomater Sci 2014; 2:867-874. [DOI: 10.1039/c4bm00001c] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The self-assembly of the alanine-rich amphiphilic peptides Lys(Ala)6Lys (KA6K) and Lys(Ala)6Glu (KA6E) with homotelechelic or heterotelechelic charged termini respectively has been investigated in aqueous solution. The latter forms enzyme-degradable hydrogels.
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Affiliation(s)
- V. Castelletto
- School of Chemistry
- Food Biosciences and Pharmacy
- University of Reading
- Reading RG6 6AD, UK
| | - R. J. Gouveia
- School of Chemistry
- Food Biosciences and Pharmacy
- University of Reading
- Reading RG6 6AD, UK
| | - C. J. Connon
- School of Chemistry
- Food Biosciences and Pharmacy
- University of Reading
- Reading RG6 6AD, UK
| | - I. W. Hamley
- School of Chemistry
- Food Biosciences and Pharmacy
- University of Reading
- Reading RG6 6AD, UK
| | - J. Seitsonen
- Department of Applied Physics
- Aalto University School of Science
- FI-00076 Aalto, Finland
| | - J. Ruokolainen
- Department of Applied Physics
- Aalto University School of Science
- FI-00076 Aalto, Finland
| | - E. Longo
- Diamond Light Source Ltd
- Harwell Science and Innovation campus
- Didcot, UK
| | - G. Siligardi
- Diamond Light Source Ltd
- Harwell Science and Innovation campus
- Didcot, UK
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44
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Gill BJ, West JL. Modeling the tumor extracellular matrix: Tissue engineering tools repurposed towards new frontiers in cancer biology. J Biomech 2013; 47:1969-78. [PMID: 24300038 DOI: 10.1016/j.jbiomech.2013.09.029] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2013] [Revised: 09/27/2013] [Accepted: 09/27/2013] [Indexed: 11/30/2022]
Abstract
Cancer progression is mediated by complex epigenetic, protein and structural influences. Critical among them are the biochemical, mechanical and architectural properties of the extracellular matrix (ECM). In recognition of the ECM's important role, cancer biologists have repurposed matrix mimetic culture systems first widely used by tissue engineers as new tools for in vitro study of tumor models. In this review we discuss the pathological changes in tumor ECM, the limitations of 2D culture on both traditional and polyacrylamide hydrogel surfaces in modeling these characteristics and advances in both naturally derived and synthetic scaffolds to facilitate more complex and controllable 3D cancer cell culture. Studies using naturally derived matrix materials like Matrigel and collagen have produced significant findings related to tumor morphogenesis and matrix invasion in a 3D environment and the mechanotransductive signaling that mediates key tumor-matrix interaction. However, lack of precise experimental control over important matrix factors in these matrices have increasingly led investigators to synthetic and semi-synthetic scaffolds that offer the engineering of specific ECM cues and the potential for more advanced experimental manipulations. Synthetic scaffolds composed of poly(ethylene glycol) (PEG), for example, facilitate highly biocompatible 3D culture, modular bioactive features like cell-mediated matrix degradation and complete independent control over matrix bioactivity and mechanics. Future work in PEG or similar reductionist synthetic matrix systems should enable the study of increasingly complex and dynamic tumor-ECM relationships in the hopes that accurate modeling of these relationships may reveal new cancer therapeutics targeting tumor progression and metastasis.
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Affiliation(s)
- Bartley J Gill
- Department of Bioengineering, Rice University, Houston, TX, USA
| | - Jennifer L West
- Department of Biomedical Engineering, Duke University, Durham, USA.
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45
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Clarke KC, Douglas AM, Brown AC, Barker TH, Lyon LA. Colloid-matrix assemblies in regenerative medicine. Curr Opin Colloid Interface Sci 2013. [DOI: 10.1016/j.cocis.2013.07.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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46
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Alge DL, Anseth KS. Thiol‐X Reactions in Tissue Engineering. THIOL‐X CHEMISTRIES IN POLYMER AND MATERIALS SCIENCE 2013. [DOI: 10.1039/9781849736961-00165] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Thiol‐based click reactions have played a key role in the synthesis of biomaterial scaffolds for regenerative medicine applications. Of particular importance has been their use in creating cell‐laden hydrogel matrices for both fundamental and translational applications. Thiol‐X reactions are often exploited in biological applications as they allow for the facile incorporation of biofunctional components, which has led to many key advancements for the field of tissue engineering. In this chapter, we summarize the important considerations for cytocompatible macromolecular monomer design and subsequent cellular encapsulation in hydrogel formulations. Briefly, we review the main thiol‐X reactions that have been used to synthesize hydrogel cell scaffold systems; provide a generalized protocol for the preparation of cell‐laden hydrogels; present highlights that demonstrate specific advantages of thiol‐X reactions and advances in their application in regenerative medicine research; and conclude with a prospectus on future directions for the field in using thiol‐X chemistries to engineer more advanced hydrogel materials.
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Affiliation(s)
- Daniel L. Alge
- Department of Chemical and Biological Engineering University of Colorado, Boulder, CO 80303‐1904 USA
| | - Kristi S. Anseth
- Department of Chemical and Biological Engineering University of Colorado, Boulder, CO 80303‐1904 USA
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47
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Burdick JA, Murphy WL. Moving from static to dynamic complexity in hydrogel design. Nat Commun 2013; 3:1269. [PMID: 23232399 DOI: 10.1038/ncomms2271] [Citation(s) in RCA: 332] [Impact Index Per Article: 30.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2012] [Accepted: 11/08/2012] [Indexed: 12/22/2022] Open
Abstract
Hydrogels are water-swollen polymer networks that have found a range of applications from biological scaffolds to contact lenses. Historically, their design has consisted primarily of static systems and those that exhibit simple degradation. However, advances in polymer synthesis and processing have led to a new generation of dynamic systems that are capable of responding to artificial triggers and biological signals with spatial precision. These systems will open up new possibilities for the use of hydrogels as model biological structures and in tissue regeneration.
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Affiliation(s)
- Jason A Burdick
- Department of Bioengineering, University of Pennsylvania, 240 Skirkanich Hall, 210 S. 33rd street, Philadelphia, Pennsylvania 19104, USA.
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48
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Hoffmann JC, West JL. Three-dimensional photolithographic micropatterning: a novel tool to probe the complexities of cell migration. Integr Biol (Camb) 2013; 5:817-27. [PMID: 23460015 PMCID: PMC3742361 DOI: 10.1039/c3ib20280a] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In order to independently study the numerous variables that influence cell movement, it will be necessary to employ novel tools and materials that allow for exquisite control of the cellular microenvironment. In this work, we have applied advanced 3D micropatterning technology, known as two-photon laser scanning lithography (TP-LSL), to poly(ethylene glycol) (PEG) hydrogels modified with bioactive peptides in order to fabricate precisely designed microenvironments to guide and quantitatively investigate cell migration. Specifically, TP-LSL was used to fabricate cell adhesive PEG-RGDS micropatterns on the surface of non-degradable PEG-based hydrogels (2D) and in the interior of proteolytically degradable PEG-based hydrogels (3D). HT1080 cell migration was guided down these adhesive micropatterns in both 2D and 3D, as observed via time-lapse microscopy. Differences in cell speed, cell persistence, and cell shape were observed based on variation of adhesive ligand, hydrogel composition, and patterned area for both 2D and 3D migration. Results indicated that HT1080s migrate faster and with lower persistence on 2D surfaces, while HT1080s migrating in 3D were smaller and more elongated. Further, cell migration was shown to have a biphasic dependence on PEG-RGDS concentration and cells moving within PEG-RGDS micropatterns were seen to move faster and with more persistence over time. Importantly, the work presented here begins to elucidate the multiple complex factors involved in cell migration, with typical confounding factors being independently controlled. The development of this unique platform will allow researchers to probe how cells behave within increasingly complex 3D microenvironments that begin to mimic specifically chosen aspects of the in vivo landscape.
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Affiliation(s)
- Joseph C. Hoffmann
- Department of Bioengineering: MS-142, Rice University, 6100 Main Street, Houston, Texas, 77005, USA. Fax: 713-348-5877; Tel: 713-348-5955;
| | - Jennifer L. West
- Department of Biomedical Engineering: Box 90281, Duke University Durham, North Carolina, 27708, USA. Fax: 919-684-4488; Tel: 919-660-5131;
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49
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Lim JJ, Temenoff JS. The effect of desulfation of chondroitin sulfate on interactions with positively charged growth factors and upregulation of cartilaginous markers in encapsulated MSCs. Biomaterials 2013; 34:5007-18. [PMID: 23570717 DOI: 10.1016/j.biomaterials.2013.03.037] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2012] [Accepted: 03/13/2013] [Indexed: 11/17/2022]
Abstract
Sulfated glycosaminoglycans (GAGs) are known to interact electrostatically with positively charged growth factors to modulate signaling. Therefore, regulating the degree of sulfation of GAGs may be a promising approach to tailor biomaterial carriers for controlled growth factor delivery and release. For this study, chondroitin sulfate (CS) was first desulfated to form chondroitin, and resulting crosslinked CS and chondroitin hydrogels were examined in vitro for release of positively charged model protein (histone) and for their effect on cartilaginous differentiation of encapsulated human mesenchymal stem cells (MSCs). Desulfation significantly increased the release of histone from chondroitin hydrogels (30.6 ± 2.3 μg released over 8 days, compared to natively sulfated CS with 20.2 ± 0.8 μg), suggesting that sulfation alone plays a significant role in modulating protein interactions with GAG hydrogels. MSCs in chondroitin hydrogels significantly upregulated gene expression of collagen II and aggrecan by day 21 in chondrogenic medium (115 ± 100 and 23.1 ± 7.9 fold upregulation of collagen II and aggrecan, respectively), compared to CS hydrogels and PEG-based swelling controls, indicating that desulfation may actually enhance the response of MSCs to soluble chondrogenic cues, such as TGF-β1. Thus, desulfated chondroitin materials present a promising biomaterial tool to further investigate electrostatic GAG/growth factor interactions, especially for repair of cartilaginous tissues.
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Affiliation(s)
- Jeremy J Lim
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA 30332, USA
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Alge DL, Azagarsamy MA, Donohue DF, Anseth KS. Synthetically tractable click hydrogels for three-dimensional cell culture formed using tetrazine-norbornene chemistry. Biomacromolecules 2013; 14:949-53. [PMID: 23448682 PMCID: PMC3623454 DOI: 10.1021/bm4000508] [Citation(s) in RCA: 191] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
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The implementation of bio-orthogonal
click chemistries is a topic
of growing importance in the field of biomaterials, as it is enabling
the development of increasingly complex hydrogel materials capable
of providing dynamic, cell-instructive microenvironments. Here, we
introduce the tetrazine–norbornene inverse electron demand
Diels–Alder reaction as a new cross-linking chemistry for the
formation of cell laden hydrogels. The fast reaction rate and irreversible
nature of this click reaction allowed for hydrogel formation within
minutes when a multifunctional PEG-tetrazine macromer was reacted
with a dinorbornene peptide. In addition, the cytocompatibility of
the polymerization led to high postencapsulation viability of human
mesenchymal stem cells, and the specificity of the tetrazine–norbornene
reaction was exploited for sequential modification of the network
via thiol–ene photochemistry. These advantages, combined with
the synthetic accessibility of the tetrazine molecule compared to
other bio-orthogonal click reagents, make this cross-linking chemistry
an interesting and powerful new tool for the development of cell-instructive
hydrogels for tissue engineering applications.
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Affiliation(s)
- Daniel L Alge
- Department of Chemical and Biological Engineering, the BioFrontiers Institute, and the Howard Hughes Medical Institute, University of Colorado at Boulder, Boulder, Colorado 80309, USA
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