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Suwannakot P, Nemec S, Peres NG, Du EY, Kilian KA, Gaus K, Kavallaris M, Gooding JJ. Electrostatic Assembly of Multiarm PEG-Based Hydrogels as Extracellular Matrix Mimics: Cell Response in the Presence and Absence of RGD Cell Adhesive Ligands. ACS Biomater Sci Eng 2023; 9:1362-1376. [PMID: 36826383 DOI: 10.1021/acsbiomaterials.2c01252] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Abstract
Synthetic hydrogels have been used widely as extracellular matrix (ECM) mimics due to the ability to control and mimic physical and biochemical cues observed in natural ECM proteins such as collagen, laminin, and fibronectin. Most synthetic hydrogels are formed via covalent bonding resulting in slow gelation which is incompatible with drop-on-demand 3D bioprinting of cells and injectable hydrogels for therapeutic delivery. Herein, we developed an electrostatically crosslinked PEG-based hydrogel system for creating high-throughput 3D in vitro models using synthetic hydrogels to mimic the ECM cancer environment. A 3-arm PEG-based polymer backbone was first modified with either permanent cationic charged moieties (2-(methacryloyloxy)ethyl trimethylammonium) or permanent anionic charged moieties (3-sulfopropyl methacrylate potassium salt). The resulting charged polymers can be conjugated further with various amounts of cell adhesive RGD motifs (0, 25, 75, and 98%) to study the influences of RGD motifs on breast cancer (MCF-7) spheroid formation. Formation, stability, and mechanical properties of hydrogels were tested with, and without, RGD to evaluate the cellular response to material parameters in a 3D environment. The hydrogels can be degraded in the presence of salts at room temperature by breaking the interaction of oppositely charged polymer chains. MCF-7 cells could be released with high viability through brief exposure to NaCl solution. Flow cytometry characterization demonstrated that embedded MCF-7 cells proliferate better in a softer (60 Pa) 3D hydrogel environment compared to those that are stiffer (1160 Pa). As the stiffness increases, the RGD motif plays a role in promoting cell proliferation in the stiffer hydrogel. Flow cytometry characterization demonstrated that embedded MCF-7 cells proliferate better in a softer (60 Pa) 3D hydrogel environment compared to those that are stiffer (1160 Pa). As the stiffness increases, the RGD motif plays a role in promoting cell proliferation in the stiffer hydrogel. Additionally, cell viability was not impacted by the tested hydrogel stiffness range between 60 to 1160 Pa. Taken together, this PEG-based tuneable hydrogel system shows great promise as a 3D ECM mimic of cancer extracellular environments with controllable biophysical and biochemical properties. The ease of gelation and dissolution through salt concentration provides a way to quickly harvest cells for further analysis at any given time of interest without compromising cell viability.
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Affiliation(s)
- Panthipa Suwannakot
- School of Chemistry, UNSW, Sydney, New South Wales 2052, Australia
- Australian Centre for NanoMedicine, UNSW, Sydney, New South Wales 2052, Australia
| | - Stephanie Nemec
- School of Materials Science and Engineering, UNSW, Sydney, New South Wales 2052, Australia
| | - Newton Gil Peres
- School of Medical Sciences, EMBL Australia Node in Single Molecule Science, UNSW, Sydney, New South Wales 2052, Australia
| | - Eric Y Du
- School of Chemistry, UNSW, Sydney, New South Wales 2052, Australia
- Australian Centre for NanoMedicine, UNSW, Sydney, New South Wales 2052, Australia
| | - Kristopher A Kilian
- School of Chemistry, UNSW, Sydney, New South Wales 2052, Australia
- School of Materials Science and Engineering, UNSW, Sydney, New South Wales 2052, Australia
- Australian Centre for NanoMedicine, UNSW, Sydney, New South Wales 2052, Australia
| | - Katharina Gaus
- School of Medical Sciences, EMBL Australia Node in Single Molecule Science, UNSW, Sydney, New South Wales 2052, Australia
| | - Maria Kavallaris
- Children's Cancer Institute, Lowy Cancer Research Centre, UNSW, Sydney, New South Wales 2052, Australia
- Australian Centre for NanoMedicine, UNSW, Sydney, New South Wales 2052, Australia
| | - J Justin Gooding
- School of Chemistry, UNSW, Sydney, New South Wales 2052, Australia
- Australian Centre for NanoMedicine, UNSW, Sydney, New South Wales 2052, Australia
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Mirzaali MJ, Moosabeiki V, Rajaai SM, Zhou J, Zadpoor AA. Additive Manufacturing of Biomaterials-Design Principles and Their Implementation. MATERIALS (BASEL, SWITZERLAND) 2022; 15:ma15155457. [PMID: 35955393 PMCID: PMC9369548 DOI: 10.3390/ma15155457] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Revised: 07/25/2022] [Accepted: 07/28/2022] [Indexed: 05/04/2023]
Abstract
Additive manufacturing (AM, also known as 3D printing) is an advanced manufacturing technique that has enabled progress in the design and fabrication of customised or patient-specific (meta-)biomaterials and biomedical devices (e.g., implants, prosthetics, and orthotics) with complex internal microstructures and tuneable properties. In the past few decades, several design guidelines have been proposed for creating porous lattice structures, particularly for biomedical applications. Meanwhile, the capabilities of AM to fabricate a wide range of biomaterials, including metals and their alloys, polymers, and ceramics, have been exploited, offering unprecedented benefits to medical professionals and patients alike. In this review article, we provide an overview of the design principles that have been developed and used for the AM of biomaterials as well as those dealing with three major categories of biomaterials, i.e., metals (and their alloys), polymers, and ceramics. The design strategies can be categorised as: library-based design, topology optimisation, bio-inspired design, and meta-biomaterials. Recent developments related to the biomedical applications and fabrication methods of AM aimed at enhancing the quality of final 3D-printed biomaterials and improving their physical, mechanical, and biological characteristics are also highlighted. Finally, examples of 3D-printed biomaterials with tuned properties and functionalities are presented.
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Lunzer M, Maryasin B, Zandrini T, Baudis S, Ovsianikov A, Liska R. A disulfide-based linker for thiol–norbornene conjugation: formation and cleavage of hydrogels by the use of light. Polym Chem 2022; 13:1158-1168. [PMID: 35341220 PMCID: PMC8886483 DOI: 10.1039/d1py00914a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Accepted: 01/03/2022] [Indexed: 11/21/2022]
Abstract
A photolinker for formation of disulfide-crosslinked hydrogels via light-triggered thiol–ene conjugation has been developed. Hydrogels can be patterned via two-photon cleavage of disulfide-linkages in the presence of a two-photon active compound.
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Affiliation(s)
- Markus Lunzer
- Institute of Applied Synthetic Chemistry, Technische Universität Wien, Getreidemarkt 9/E163, 1060 Vienna, Austria
- Institute of Materials Science and Technology, Technische Universität Wien, Getreidemarkt 9/E308, 1060 Vienna, Austria
| | - Boris Maryasin
- Institute of Organic Chemistry, University of Vienna, Währinger Strasse 38, 1090 Vienna, Austria
- Institute of Theoretical Chemistry, University of Vienna, Währinger Strasse 17, 1090 Vienna, Austria
| | - Tommaso Zandrini
- Institute of Materials Science and Technology, Technische Universität Wien, Getreidemarkt 9/E308, 1060 Vienna, Austria
| | - Stefan Baudis
- Institute of Applied Synthetic Chemistry, Technische Universität Wien, Getreidemarkt 9/E163, 1060 Vienna, Austria
| | - Aleksandr Ovsianikov
- Institute of Materials Science and Technology, Technische Universität Wien, Getreidemarkt 9/E308, 1060 Vienna, Austria
| | - Robert Liska
- Institute of Applied Synthetic Chemistry, Technische Universität Wien, Getreidemarkt 9/E163, 1060 Vienna, Austria
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Yu W, Hu B, Boakye-Yiadom KO, Ho W, Chen Q, Xu X, Zhang XQ. Injectable hydrogel mediated delivery of gene-engineered adipose-derived stem cells for enhanced osteoarthritis treatment. Biomater Sci 2021; 9:7603-7616. [PMID: 34671794 DOI: 10.1039/d1bm01122g] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Osteoarthritis (OA), a chronic and degenerative joint disease, remains a challenge in treatment due to the lack of disease-modifying therapies. As a promising therapeutic agent, adipose-derived stem cells (ADSCs) have an effective anti-inflammatory and chondroprotective paracrine effect that can be enhanced by genetic modification. Unfortunately, direct cell delivery without matrix support often results in poor viability of therapeutic cells. Herein, a hydrogel implant approach that enabled intra-articular delivery of gene-engineered ADSCs was developed for improved therapeutic outcomes in a surgically induced rat OA model. An injectable extracellular matrix (ECM)-mimicking hydrogel was prepared as the carrier for cell delivery, providing a favorable microenvironment for ADSC spreading and proliferation. The ECM-mimicking hydrogel could reduce cell death during and post injection. Additionally, ADSCs were genetically modified to overexpress transforming growth factor-β1 (TGF-β1), one of the paracrine factors that exert an anti-inflammatory and pro-anabolic effect. The gene-engineered ADSCs overexpressing TGF-β1 (T-ADSCs) had an enhanced paracrine effect on OA-like chondrocytes, which effectively decreased the expression of tumor necrosis factor-alpha and increased the expression of collagen II and aggrecan. In a surgically induced rat OA model, intra-articular injection of the T-ADSC-loaded hydrogel markedly reduced cartilage degeneration, joint inflammation, and the loss of the subchondral bone. Taken together, this study provides a potential biomaterial strategy for enhanced OA treatment by delivering the gene-engineered ADSCs within an ECM-mimicking hydrogel.
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Affiliation(s)
- Wei Yu
- Engineering Research Center of Cell & Therapeutic Antibody, Ministry of Education, and School of Pharmacy, Shanghai Jiao Tong University, Shanghai 200240, P. R. China.
| | - Bin Hu
- Engineering Research Center of Cell & Therapeutic Antibody, Ministry of Education, and School of Pharmacy, Shanghai Jiao Tong University, Shanghai 200240, P. R. China.
| | - Kofi Oti Boakye-Yiadom
- Engineering Research Center of Cell & Therapeutic Antibody, Ministry of Education, and School of Pharmacy, Shanghai Jiao Tong University, Shanghai 200240, P. R. China.
| | - William Ho
- Department of Chemical and Materials Engineering, New Jersey Institute of Technology, Newark, NJ 07102, USA.
| | - Qijing Chen
- Engineering Research Center of Cell & Therapeutic Antibody, Ministry of Education, and School of Pharmacy, Shanghai Jiao Tong University, Shanghai 200240, P. R. China.
| | - Xiaoyang Xu
- Department of Chemical and Materials Engineering, New Jersey Institute of Technology, Newark, NJ 07102, USA.
| | - Xue-Qing Zhang
- Engineering Research Center of Cell & Therapeutic Antibody, Ministry of Education, and School of Pharmacy, Shanghai Jiao Tong University, Shanghai 200240, P. R. China.
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6
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Li C, Nie F, Liu X, Chen M, Chi D, Li S, Pipinos II, Li X. Antioxidative and Angiogenic Hyaluronic Acid-Based Hydrogel for the Treatment of Peripheral Artery Disease. ACS APPLIED MATERIALS & INTERFACES 2021; 13:45224-45235. [PMID: 34519480 DOI: 10.1021/acsami.1c11349] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Peripheral arterial disease (PAD) is a progressive atherosclerotic disorder characterized by blockages of the arteries supplying the lower extremities. Ischemia initiates oxidative damage and mitochondrial dysfunction in the legs of PAD patients, causing injury to the tissues of the leg, significant decline in walking performance, leg pain while walking, and in the most severe cases, nonhealing ulcers and gangrene. Current clinical trials based on cells/stem cells, the trophic factor, or gene therapy systems have shown some promising results for the treatment of PAD. Biomaterial matrices have been explored in animal models of PAD to enhance these therapies. However, current biomaterial approaches have not fully met the essential requirements for minimally invasive intramuscular delivery to the leg. Ideally, a biomaterial should present properties to ameliorate oxidative stress/damage and failure of angiogenesis. Recently, we have created a thermosensitive hyaluronic acid (HA) hydrogel with antioxidant capacity and skeletal muscle-matching stiffness. Here, we further optimized HA hydrogels with the cell adhesion peptide RGD to facilitate the development of vascular-like structures in vitro. The optimized HA hydrogel reduced intracellular reactive oxygen species levels and preserved vascular-like structures against H2O2-induced damage in vitro. HA hydrogels also provided prolonged release of the vascular endothelial growth factor (VEGF). After injection into rat ischemic hindlimb muscles, this VEGF-releasing hydrogel reduced lipid oxidation, regulated oxidative-related genes, enhanced local blood flow in the muscle, and improved running capacity of the treated rats. Our HA hydrogel system holds great potential for the treatment of the ischemic legs of patients with PAD.
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Affiliation(s)
- Cui Li
- Department of Physiology, Xuzhou Medical University, Xuzhou, Jiangsu 221004, China
- Department of Neurological Sciences, University of Nebraska Medical Center, Omaha, Nebraska 68198, United States
| | - Fujiao Nie
- Hunan Engineering Technology Research Center for the Prevention and Treatment of Otorhinolaryngologic Diseases and Protection of Visual Function with Chinese Medicine, Human University of Chinese Medicine, Changsha, Hunan 410208, China
- Department of Neurological Sciences, University of Nebraska Medical Center, Omaha, Nebraska 68198, United States
| | - Xiaoyan Liu
- Department of Neurological Sciences, University of Nebraska Medical Center, Omaha, Nebraska 68198, United States
| | - Meng Chen
- Department of Neurological Sciences, University of Nebraska Medical Center, Omaha, Nebraska 68198, United States
| | - David Chi
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, Missouri 63110, United States
| | - Shuai Li
- Department of Surgery, University of Nebraska Medical Center, Omaha, Nebraska 68198, United States
| | - Iraklis I Pipinos
- Department of Surgery, University of Nebraska Medical Center, Omaha, Nebraska 68198, United States
| | - Xiaowei Li
- Department of Neurological Sciences, University of Nebraska Medical Center, Omaha, Nebraska 68198, United States
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Washington University School of Medicine, St. Louis, Missouri 63110, United States
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7
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Yin S, Cao Y. Hydrogels for Large-Scale Expansion of Stem Cells. Acta Biomater 2021; 128:1-20. [PMID: 33746032 DOI: 10.1016/j.actbio.2021.03.026] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 02/25/2021] [Accepted: 03/10/2021] [Indexed: 12/18/2022]
Abstract
Stem cells demonstrate considerable promise for various preclinical and clinical applications, including drug screening, disease treatments, and regenerative medicine. Producing high-quality and large amounts of stem cells is in demand for these applications. Despite challenges, as hydrogel-based cell culture technology has developed, tremendous progress has been made in stem cell expansion and directed differentiation. Hydrogels are soft materials with abundant water. Many hydrogel properties, including biodegradability, mechanical strength, and porosity, have been shown to play essential roles in regulating stem cell proliferation and differentiation. The biochemical and physical properties of hydrogels can be specifically tailored to mimic the native microenvironment that various stem cells reside in vivo. A few hydrogel-based systems have been developed for successful stem cell cultures and expansion in vitro. In this review, we summarize various types of hydrogels that have been designed to effectively enhance the proliferation of hematopoietic stem cells (HSCs), mesenchymal stem/stromal cells (MSCs), and pluripotent stem cells (PSCs), respectively. According to each stem cell type's preference, we also discuss strategies for fabricating hydrogels with biochemical and mechanical cues and other characteristics representing microenvironments of stem cells in vivo. STATEMENT OF SIGNIFICANCE: In this review article we summarize current progress on the construction of hydrogel systems for the culture and expansion of various stem cells, including hematopoietic stem cells (HSCs), mesenchymal stem/stromal cells (MSCs), and pluripotent stem cells (PSCs). The Significance includes: (1) Provide detailed discussion on the stem cell niches that should be considered for stem cell in vitro expansion. (2) Summarize various strategies to construct hydrogels that can largely recapture the microenvironment of native stem cells. (3) Suggest a few future directions that can be implemented to improve current in vitro stem cell expansion systems.
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Affiliation(s)
- Sheng Yin
- National Laboratory of Solid State Microstructure, Department of Physics, Nanjing University, Nanjing, 210093, China; Chemistry and Biomedicine innovation center, Nanjing University, Nanjing, 210093, China; Institute for Brain Sciences, Nanjing University, Nanjing, 210093, China; Shenzhen Research Institute of Nanjing University, Shenzhen, China, 518057
| | - Yi Cao
- National Laboratory of Solid State Microstructure, Department of Physics, Nanjing University, Nanjing, 210093, China; Chemistry and Biomedicine innovation center, Nanjing University, Nanjing, 210093, China; Institute for Brain Sciences, Nanjing University, Nanjing, 210093, China; Shenzhen Research Institute of Nanjing University, Shenzhen, China, 518057.
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8
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Wang S, Tsao CY, Motabar D, Li J, Payne GF, Bentley WE. A Redox-Based Autoinduction Strategy to Facilitate Expression of 5xCys-Tagged Proteins for Electrobiofabrication. Front Microbiol 2021; 12:675729. [PMID: 34220759 PMCID: PMC8250426 DOI: 10.3389/fmicb.2021.675729] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Accepted: 05/13/2021] [Indexed: 01/17/2023] Open
Abstract
Biofabrication utilizes biological materials and biological means, or mimics thereof, for assembly. When interfaced with microelectronics, electrobiofabricated assemblies enable exquisite sensing and reporting capabilities. We recently demonstrated that thiolated polyethylene glycol (PEG-SH) could be oxidatively assembled into a thin disulfide crosslinked hydrogel at an electrode surface; with sufficient oxidation, extra sulfenic acid groups are made available for covalent, disulfide coupling to sulfhydryl groups of proteins or peptides. We intentionally introduced a polycysteine tag (5xCys-tag) consisting of five consecutive cysteine residues at the C-terminus of a Streptococcal protein G to enable its covalent coupling to an electroassembled PEG-SH film. We found, however, that its expression and purification from E. coli was difficult, owing to the extra cysteine residues. We developed a redox-based autoinduction methodology that greatly enhanced the yield, especially in the soluble fraction of E. coli extracts. The redox component involved the deletion of oxyRS, a global regulator of the oxidative stress response and the autoinduction component integrated a quorum sensing (QS) switch that keys the secreted QS autoinducer-2 to induction. Interestingly, both methods helped when independently employed and further, when used in combination (i.e., autodinduced oxyRS mutant) the results were best—we found the highest total yield and highest yield in the soluble fraction. We hypothesize that the production host was less prone to severe metabolic perturbations that might reduce yield or drive sequestration of the -tagged protein into inclusion bodies. We expect this methodology will be useful for the expression of many such Cys-tagged proteins, ultimately enabling a diverse array of functionalized devices.
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Affiliation(s)
- Sally Wang
- Fischell Department of Bioengineering, University of Maryland, College Park, College Park, MD, United States.,Fischell Institute for Biomedical Devices, University of Maryland, College Park, College Park, MD, United States.,Institute of Bioscience and Biotechnology Research, University of Maryland, College Park, College Park, MD, United States
| | - Chen-Yu Tsao
- Fischell Institute for Biomedical Devices, University of Maryland, College Park, College Park, MD, United States.,Institute of Bioscience and Biotechnology Research, University of Maryland, College Park, College Park, MD, United States
| | - Dana Motabar
- Fischell Department of Bioengineering, University of Maryland, College Park, College Park, MD, United States.,Fischell Institute for Biomedical Devices, University of Maryland, College Park, College Park, MD, United States.,Institute of Bioscience and Biotechnology Research, University of Maryland, College Park, College Park, MD, United States
| | - Jinyang Li
- Fischell Department of Bioengineering, University of Maryland, College Park, College Park, MD, United States.,Fischell Institute for Biomedical Devices, University of Maryland, College Park, College Park, MD, United States.,Institute of Bioscience and Biotechnology Research, University of Maryland, College Park, College Park, MD, United States
| | - Gregory F Payne
- Fischell Institute for Biomedical Devices, University of Maryland, College Park, College Park, MD, United States.,Institute of Bioscience and Biotechnology Research, University of Maryland, College Park, College Park, MD, United States
| | - William E Bentley
- Fischell Department of Bioengineering, University of Maryland, College Park, College Park, MD, United States.,Fischell Institute for Biomedical Devices, University of Maryland, College Park, College Park, MD, United States.,Institute of Bioscience and Biotechnology Research, University of Maryland, College Park, College Park, MD, United States
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9
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Rizwan M, Baker AEG, Shoichet MS. Designing Hydrogels for 3D Cell Culture Using Dynamic Covalent Crosslinking. Adv Healthc Mater 2021; 10:e2100234. [PMID: 33987970 DOI: 10.1002/adhm.202100234] [Citation(s) in RCA: 65] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Revised: 04/22/2021] [Indexed: 12/17/2022]
Abstract
Designing simple biomaterials to replicate the biochemical and mechanical properties of tissues is an ongoing challenge in tissue engineering. For several decades, new biomaterials have been engineered using cytocompatible chemical reactions and spontaneous ligations via click chemistries to generate scaffolds and water swollen polymer networks, known as hydrogels, with tunable properties. However, most of these materials are static in nature, providing only macroscopic tunability of the scaffold mechanics, and do not reflect the dynamic environment of natural extracellular microenvironment. For more complex applications such as organoids or co-culture systems, there remain opportunities to investigate cells that locally remodel and change the physicochemical properties within the matrices. In this review, advanced biomaterials where dynamic covalent chemistry is used to produce stable 3D cell culture models and high-resolution constructs for both in vitro and in vivo applications, are discussed. The implications of dynamic covalent chemistry on viscoelastic properties of in vitro models are summarized, case studies in 3D cell culture are critically analyzed, and opportunities to further improve the performance of biomaterials for 3D tissue engineering are discussed.
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Affiliation(s)
- Muhammad Rizwan
- Department of Chemical Engineering and Applied Chemistry University of Toronto Toronto Ontario M5S 3E5 Canada
- Institute of Biomedical Engineering University of Toronto Toronto Ontario M5S 3G9 Canada
- Donnelly Centre for Cellular and Biomolecular Research University of Toronto Toronto Ontario M5S 3E1 Canada
| | - Alexander E. G. Baker
- Department of Chemical Engineering and Applied Chemistry University of Toronto Toronto Ontario M5S 3E5 Canada
- Institute of Biomedical Engineering University of Toronto Toronto Ontario M5S 3G9 Canada
- Donnelly Centre for Cellular and Biomolecular Research University of Toronto Toronto Ontario M5S 3E1 Canada
| | - Molly S. Shoichet
- Department of Chemical Engineering and Applied Chemistry University of Toronto Toronto Ontario M5S 3E5 Canada
- Institute of Biomedical Engineering University of Toronto Toronto Ontario M5S 3G9 Canada
- Donnelly Centre for Cellular and Biomolecular Research University of Toronto Toronto Ontario M5S 3E1 Canada
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10
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Immunomodulatory biomaterials and their application in therapies for chronic inflammation-related diseases. Acta Biomater 2021; 123:1-30. [PMID: 33484912 DOI: 10.1016/j.actbio.2021.01.025] [Citation(s) in RCA: 43] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Revised: 12/05/2020] [Accepted: 01/15/2021] [Indexed: 02/06/2023]
Abstract
The degree of tissue injuries such as the level of scarring or organ dysfunction, and the immune response against them primarily determine the outcome and speed of healing process. The successful regeneration of functional tissues requires proper modulation of inflammation-producing immune cells and bioactive factors existing in the damaged microenvironment. In the tissue repair and regeneration processes, different types of biomaterials are implanted either alone or by combined with other bioactive factors, which will interact with the immune systems including immune cells, cytokines and chemokines etc. to achieve different results highly depending on this interplay. In this review article, the influences of different types of biomaterials such as nanoparticles, hydrogels and scaffolds on the immune cells and the modification of immune-responsive factors such as reactive oxygen species (ROS), cytokines, chemokines, enzymes, and metalloproteinases in tissue microenvironment are summarized. In addition, the recent advances of immune-responsive biomaterials in therapy of inflammation-associated diseases such as myocardial infarction, spinal cord injury, osteoarthritis, inflammatory bowel disease and diabetic ulcer are discussed.
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11
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Aluri KC, Hossain MA, Kanetkar N, Miller BC, Dowgiallo MG, Sivasankar D, Sullivan MR, Manetsch R, Konry T, Ekenseair A, Agar JN. Cyclic Thiosulfinates as a Novel Class of Disulfide Cleavable Cross-Linkers for Rapid Hydrogel Synthesis. Bioconjug Chem 2021; 32:584-594. [PMID: 33606505 DOI: 10.1021/acs.bioconjchem.1c00049] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We recently reported that cyclic thiosulfinates are cysteine selective cross-linkers that avoid the "dead-end" modifications that contribute to other cross-linkers' toxicity. In this study, we generalize the chemistry of cyclic thiosulfinates to that of thiol selective cross-linking and apply them to the synthesis of hydrogels. Thiol-functionalized four-arm poly(ethylene glycol) and hyaluronic acid monomers were cross-linked with 1,2-dithiane-1-oxide to form disulfide cross-linked hydrogels within seconds. The synthesized hydrogel could be reduced with physiological concentrations of glutathione, which modulated hydrogel mechanical properties and degradation kinetics. Bovine serum albumin protein was successfully encapsulated in hydrogel, and diffusion-mediated release was demonstrated in vitro. Hep G2 cells grew in the presence of preformed hydrogel and during hydrogel synthesis, demonstrating acceptable cytotoxicity. We encapsulated cells within a hydrogel and demonstrated cell growth and recovery up to 10 days, with and without cell adhesion peptides. In summary, we report cyclic thiosulfinates as a novel class of cross-linkers for the facile synthesis of biodegradable hydrogels.
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Affiliation(s)
- Krishna C Aluri
- Department of Chemistry and Chemical Biology, Northeastern University, 360 Huntington Avenue, Boston, Massachusetts 02115, United States.,Barnett Institute of Chemical and Biological Analysis, Northeastern University, 360 Huntington Avenue, Boston, Massachusetts 02115, United States
| | - Md Amin Hossain
- Department of Chemistry and Chemical Biology, Northeastern University, 360 Huntington Avenue, Boston, Massachusetts 02115, United States.,Barnett Institute of Chemical and Biological Analysis, Northeastern University, 360 Huntington Avenue, Boston, Massachusetts 02115, United States
| | - Ninad Kanetkar
- Department of Chemical Engineering, Northeastern University, 360 Huntington Avenue, Boston, Massachusetts 02115, United States
| | - Brandon C Miller
- Department of Chemistry and Chemical Biology, Northeastern University, 360 Huntington Avenue, Boston, Massachusetts 02115, United States
| | - Matthew G Dowgiallo
- Department of Chemistry and Chemical Biology, Northeastern University, 360 Huntington Avenue, Boston, Massachusetts 02115, United States
| | - Durgalakshmi Sivasankar
- Department of Chemistry and Chemical Biology, Northeastern University, 360 Huntington Avenue, Boston, Massachusetts 02115, United States.,Barnett Institute of Chemical and Biological Analysis, Northeastern University, 360 Huntington Avenue, Boston, Massachusetts 02115, United States
| | - Matthew R Sullivan
- Department of Pharmaceutical Sciences, Northeastern University, 360 Huntington Avenue, Boston, Massachusetts 02115, United States
| | - Roman Manetsch
- Department of Chemistry and Chemical Biology, Northeastern University, 360 Huntington Avenue, Boston, Massachusetts 02115, United States.,Department of Pharmaceutical Sciences, Northeastern University, 360 Huntington Avenue, Boston, Massachusetts 02115, United States
| | - Tania Konry
- Department of Pharmaceutical Sciences, Northeastern University, 360 Huntington Avenue, Boston, Massachusetts 02115, United States
| | - Adam Ekenseair
- Department of Chemical Engineering, Northeastern University, 360 Huntington Avenue, Boston, Massachusetts 02115, United States
| | - Jeffrey N Agar
- Department of Chemistry and Chemical Biology, Northeastern University, 360 Huntington Avenue, Boston, Massachusetts 02115, United States.,Barnett Institute of Chemical and Biological Analysis, Northeastern University, 360 Huntington Avenue, Boston, Massachusetts 02115, United States.,Department of Pharmaceutical Sciences, Northeastern University, 360 Huntington Avenue, Boston, Massachusetts 02115, United States
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12
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Chen M, Li C, Nie F, Liu X, Pipinos II, Li X. Synthesis and characterization of a hyaluronic acid-based hydrogel with antioxidative and thermosensitive properties. RSC Adv 2020; 10:33851-33860. [PMID: 35519025 PMCID: PMC9056774 DOI: 10.1039/d0ra07208g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Accepted: 09/04/2020] [Indexed: 02/01/2023] Open
Abstract
Peripheral arterial disease (PAD) is initiated by progressive atherosclerotic blockages of the arteries supplying the lower extremities. The most common presentation of PAD is claudication (leg pain and severe walking limitation), with many patients progressing to limb threatening ischemia and amputation. Biomaterial approaches are just beginning to be explored in the therapy of PAD with different materials now being evaluated for the delivery of cells or growth factors in animal models of PAD. A biomaterial matrix optimized for minimally invasive injection in the ischemic leg muscles of patients with PAD is urgently needed. There are several important requirements for optimal delivery, retention, and performance of a biomaterial matrix in the mechanically, histologically, and biochemically dynamic intramuscular environment of the PAD leg. Ideally, the material should have mechanical properties matching those of the recipient muscle, undergo minimal swelling, and should introduce properties that can ameliorate the mechanisms operating in PAD like oxidative stress and damage. Here we have developed an injectable, antioxidative, and thermosensitive hydrogel system based on hyaluronic acid (HA). We first synthesized a unique crosslinker of disulfide-modified poloxamer F127 diacrylate. This crosslinker led to the creation of a thermosensitive HA hydrogel with minimal swelling and muscle-matching mechanical properties. We introduced unique disulfide groups into hydrogels which functioned as an effective reactive oxygen species scavenger, exhibited hydrogen peroxide (H2O2)-responsive degradation, and protected cells against H2O2-induced damage. Our antioxidative thermosensitive HA hydrogel system holds great potential for the treatment of the ischemic legs of patients with PAD.
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Affiliation(s)
- Meng Chen
- Mary & Dick Holland Regenerative Medicine Program, Department of Neurological Sciences, University of Nebraska Medical Center Omaha NE 68198 USA
| | - Cui Li
- Mary & Dick Holland Regenerative Medicine Program, Department of Neurological Sciences, University of Nebraska Medical Center Omaha NE 68198 USA
| | - Fujiao Nie
- Mary & Dick Holland Regenerative Medicine Program, Department of Neurological Sciences, University of Nebraska Medical Center Omaha NE 68198 USA
| | - Xiaoyan Liu
- Mary & Dick Holland Regenerative Medicine Program, Department of Neurological Sciences, University of Nebraska Medical Center Omaha NE 68198 USA
| | - Iraklis I Pipinos
- Department of Surgery, University of Nebraska Medical Center Omaha NE 68198 USA
| | - Xiaowei Li
- Mary & Dick Holland Regenerative Medicine Program, Department of Neurological Sciences, University of Nebraska Medical Center Omaha NE 68198 USA
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13
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Rajan SAP, Skardal A, Hall AR. Multi-Domain Photopatterned 3D Tumor Constructs in a Micro-Physiological System for Analysis, Quantification, and Isolation of Infiltrating Cells. ADVANCED BIOSYSTEMS 2020; 4:e1900273. [PMID: 32293164 PMCID: PMC7323471 DOI: 10.1002/adbi.201900273] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Revised: 02/07/2020] [Indexed: 12/20/2022]
Abstract
Cancer cell motility plays a central role in metastasis and tumor invasion but can be difficult to study accurately in vitro. A simple approach to address this challenge through the production of monolithic, photopatterned 3D tumor constructs in situ in a microfluidic device is described here. Through step-wise fabrication of adjoining hydrogel regions with and without incorporated cells, multidomain structures with defined boundaries are produced. By imaging cells over time, cellular activity with arbitrary control over medium conditions, including drug concentration and flow rate, is studied. First, malignant human colon carcinoma cells (HCT116) are studied for 10 days, comparing invasion dynamics and viability of cells in normal media to those exposed to two independent chemotherapeutic drugs: anti-proliferative 5-fluorouracil and anti-migratory Marimastat. Cytotoxicity is measured and significant differences are observed in cellular dynamics (migrating cell count, distance traveled, and rate) that correlate with the mechanism of each drug. Then, the platform is applied to the selective isolation of infiltrated cells through the photopatterning and subsequent dissolution of cleavable hydrogel domains. As a demonstration, the preferential collection of highly migratory cells (HCT116) over a comparable cell line with low malignancy and migratory potential (Caco-2) is shown.
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Affiliation(s)
- Shiny A P Rajan
- Virginia Tech-Wake Forest School of Biomedical Engineering and Sciences, Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, NC, 27157, USA
- Wake Forest Institute for Regenerative Medicine, Wake Forest School of Medicine, Medical Center, Winston-Salem, NC, 27101, USA
| | - Aleksander Skardal
- Virginia Tech-Wake Forest School of Biomedical Engineering and Sciences, Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, NC, 27157, USA
- Wake Forest Institute for Regenerative Medicine, Wake Forest School of Medicine, Medical Center, Winston-Salem, NC, 27101, USA
- Comprehensive Cancer Center at Wake Forest Baptist Medical, Medical Center Boulevard, Winston-Salem, NC, 27157, USA
- Department of Cancer Biology, Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, NC, 27157, USA
- Department of Biomedical Engineering, The Ohio State University and The Ohio State University Comprehensive Cancer Center, The Ohio State University Wexner Medical Center, USA
| | - Adam R Hall
- Virginia Tech-Wake Forest School of Biomedical Engineering and Sciences, Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, NC, 27157, USA
- Wake Forest Institute for Regenerative Medicine, Wake Forest School of Medicine, Medical Center, Winston-Salem, NC, 27101, USA
- Comprehensive Cancer Center at Wake Forest Baptist Medical, Medical Center Boulevard, Winston-Salem, NC, 27157, USA
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14
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Raic A, Naolou T, Mohra A, Chatterjee C, Lee-Thedieck C. 3D models of the bone marrow in health and disease: yesterday, today and tomorrow. MRS COMMUNICATIONS 2019; 9:37-52. [PMID: 30931174 PMCID: PMC6436722 DOI: 10.1557/mrc.2018.203] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2018] [Accepted: 09/10/2018] [Indexed: 05/12/2023]
Abstract
The complex interaction between hematopoietic stem cells (HSCs) and their microenvironment in the human bone marrow ensures a life-long blood production by balancing stem cell maintenance and differentiation. This so-called HSC niche can be disturbed by malignant diseases. Investigating their consequences on hematopoiesis requires deep understanding of how the niches function in health and disease. To facilitate this, biomimetic models of the bone marrow are needed to analyse HSC maintenance and hematopoiesis under steady-state and diseased conditions. Here, 3D bone marrow models, their fabrication methods (including 3D bioprinting) and implementations recapturing bone marrow functions in health and diseases, are presented.
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Affiliation(s)
- Annamarija Raic
- Karlsruhe Institute of Technology (KIT), Institute of Functional
Interfaces, 76344 Eggenstein-Leopoldshafen, Germany
| | - Toufik Naolou
- Karlsruhe Institute of Technology (KIT), Institute of Functional
Interfaces, 76344 Eggenstein-Leopoldshafen, Germany
| | - Anna Mohra
- Karlsruhe Institute of Technology (KIT), Institute of Functional
Interfaces, 76344 Eggenstein-Leopoldshafen, Germany
| | - Chandralekha Chatterjee
- Karlsruhe Institute of Technology (KIT), Institute of Functional
Interfaces, 76344 Eggenstein-Leopoldshafen, Germany
| | - Cornelia Lee-Thedieck
- Karlsruhe Institute of Technology (KIT), Institute of Functional
Interfaces, 76344 Eggenstein-Leopoldshafen, Germany
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15
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Modulating Thiol pKa Promotes Disulfide Formation at Physiological pH: An Elegant Strategy To Design Disulfide Cross-Linked Hyaluronic Acid Hydrogels. Biomacromolecules 2019; 20:1412-1420. [DOI: 10.1021/acs.biomac.8b01830] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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16
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Peng N, Ding X, Wang Z, Cheng Y, Gong Z, Xu X, Gao X, Cai Q, Huang S, Liu Y. Novel dual responsive alginate-based magnetic nanogels for onco-theranostics. Carbohydr Polym 2019; 204:32-41. [DOI: 10.1016/j.carbpol.2018.09.084] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Revised: 09/29/2018] [Accepted: 09/29/2018] [Indexed: 01/23/2023]
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17
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Aleman J, Skardal A. A multi-site metastasis-on-a-chip microphysiological system for assessing metastatic preference of cancer cells. Biotechnol Bioeng 2018; 116:936-944. [PMID: 30450540 DOI: 10.1002/bit.26871] [Citation(s) in RCA: 74] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2018] [Revised: 10/12/2018] [Accepted: 10/26/2018] [Indexed: 12/21/2022]
Abstract
Metastatic disease remains one of the primary reasons for cancer-related deaths, yet the majority of in vitro cancer models focus on the primary tumor sites. Here, we describe a metastasis-on-a-chip device that houses multiple bioengineered three-dimensional (3D) organoids, established by a 3D photopatterning technique employing extracellular matrix-derived hydrogel biomaterials. Specifically, cancer cells begin in colorectal cancer (CRC) organoid, which resides in a single microfluidic chamber connected to multiple downstream chambers in which liver, lung, and endothelial constructs are housed. Under recirculating fluid flow, tumor cells grow in the primary site, eventually enter circulation, and can be tracked via fluorescent imaging. Importantly, we describe that in the current version of this platform, HCT116 CRC cells preferentially home to the liver and lung constructs; the corresponding organs of which CRC metastases arise the most in human patients. We believe that in subsequent studies this platform can be implemented to better understand the mechanisms underlying metastasis, perhaps resulting in the identification of targets for intervention.
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Affiliation(s)
- Julio Aleman
- Wake Forest Institute for Regenerative Medicine, Wake Forest School of Medicine, Medical Center, Winston-Salem, North Carolina
| | - Aleksander Skardal
- Wake Forest Institute for Regenerative Medicine, Wake Forest School of Medicine, Medical Center, Winston-Salem, North Carolina.,Virginia Tech-Wake Forest School of Biomedical Engineering and Sciences, Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, North Carolina.,Department of Cancer Biology, Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, North Carolina.,Department of Molecular Medicine and Translational Science, Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, North Carolina.,Comprehensive Cancer Center at Wake Forest Baptist Medical, Medical Center Boulevard, Winston-Salem, North Carolina
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18
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Cho KH, Uthaman S, Park IK, Cho CS. Injectable Biomaterials in Plastic and Reconstructive Surgery: A Review of the Current Status. Tissue Eng Regen Med 2018; 15:559-574. [PMID: 30603579 PMCID: PMC6171701 DOI: 10.1007/s13770-018-0158-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Revised: 08/03/2018] [Accepted: 08/21/2018] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Injectable biomaterials have attracted increasing attention for volume restoration and tissue regeneration. The main aim of this review is to discuss the current status of the injectable biomaterials for correction of tissue defects in plastic and reconstructive surgery. METHODS Requirements of injectable biomaterials, mechanism of in situ gelation, characteristics, and the combinational usage of adipose-derived stem cells (ADSCs) and growth factors were reviewed. RESULTS The ideal injectable biomaterials should be biocompatible, non-toxic, easy to use, and cost-effective. Additionally, it should possess adequate mechanical properties and stability. In situ gelation method includes physical, chemical, enzymatic and photo-initiated methods. Natural and synthetic biomaterials carry their pros and cons due to their inherent properties. The combined use of ADSCs and growth factors provides enhanced potential for adipose tissue regeneration. CONCLUSIONS The usage of injectable biomaterials has been increasing for the tissue restoration and regeneration. The future of incorporating ADSCs and growth factors into the injectable biomaterials is promising.
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Affiliation(s)
- Ki-Hyun Cho
- Department of Plastic Surgery, Cleveland Clinic, Cleveland, OH 44195 USA
| | - Saji Uthaman
- Department of Polymer Science and Engineering, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon, 34134 Republic of Korea
| | - In-Kyu Park
- Department of Biomedical Sciences, Chonnam National University Medical School, 160 Baekseo-ro, Gwangju, 61469 Republic of Korea
| | - Chong-Su Cho
- Research Institute for Agriculture and Life Sciences, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826 Republic of Korea
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19
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Dong D, Hao T, Wang C, Zhang Y, Qin Z, Yang B, Fang W, Ye L, Yao F, Li J. Zwitterionic starch-based hydrogel for the expansion and "stemness" maintenance of brown adipose derived stem cells. Biomaterials 2017; 157:149-160. [PMID: 29272722 DOI: 10.1016/j.biomaterials.2017.12.011] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2017] [Revised: 12/04/2017] [Accepted: 12/11/2017] [Indexed: 12/18/2022]
Abstract
Brown adipose derived stem cells (BADSCs) have become a promising stem cell treatment candidate for myocardial infarction because of their efficiently spontaneous differentiation capacity towards cardiomyocytes. The lack of existing cell passage protocols motivates us to develop a neotype 3D cell expansion technique for BADSCs. In this study, "clickable" zwitterionic starch based hydrogels are developed using methacrylate modified sulfobetaine derived starch with dithiol-functionalized poly (ethylene glycol) as crosslinker via the "thiol-ene" Michael addition reaction. Moreover, CGRGDS peptide is immobilized into the hydrogel via a similar "clickable" approach. Their Young's moduli range from 22.28 to 74.81 kPa depending on the concentration of precursor solutions. Excellent anti-fouling property is also presented owing to the introduction of zwitterionic moieties. BADSCs are homogeneously encapsulated in the hydrogels and then routinely cultured for 10 days. Results suggest a capacious cell proliferation and the extent increases with either the decrease of mechanical strength or the introduction of CGRGDS. More excitingly, the cell "stemness" is well maintained during this period and the expanded cells released from the hydrogels well keep the efficiently spontaneous cardiomyogenic differentiation capacity. Therefore, it is suggested that zwitterionic starch based hydrogel is able for the expansion and "stemness " maintenance of BADSCs.
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Affiliation(s)
- Dianyu Dong
- Department of Polymer Science and Key Laboratory of Systems Bioengineering of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, No. 92, Weijin Road, Tianjin, 300072, China
| | - Tong Hao
- Department of Advanced Interdisciplinary Studies, Institute of Basic Medical Sciences and Tissue Engineering Research Center, Academy of Military Medical Sciences, No. 27, Taiping Road, Beijing, 100850, China
| | - Changyong Wang
- Department of Advanced Interdisciplinary Studies, Institute of Basic Medical Sciences and Tissue Engineering Research Center, Academy of Military Medical Sciences, No. 27, Taiping Road, Beijing, 100850, China
| | - Ying Zhang
- Department of Polymer Science and Key Laboratory of Systems Bioengineering of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, No. 92, Weijin Road, Tianjin, 300072, China
| | - Zhihui Qin
- Department of Polymer Science and Key Laboratory of Systems Bioengineering of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, No. 92, Weijin Road, Tianjin, 300072, China
| | - Boguang Yang
- Department of Polymer Science and Key Laboratory of Systems Bioengineering of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, No. 92, Weijin Road, Tianjin, 300072, China
| | - Wancai Fang
- Department of Polymer Science and Key Laboratory of Systems Bioengineering of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, No. 92, Weijin Road, Tianjin, 300072, China
| | - Lei Ye
- Department of Polymer Science and Key Laboratory of Systems Bioengineering of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, No. 92, Weijin Road, Tianjin, 300072, China
| | - Fanglian Yao
- Department of Polymer Science and Key Laboratory of Systems Bioengineering of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, No. 92, Weijin Road, Tianjin, 300072, China.
| | - Junjie Li
- Department of Advanced Interdisciplinary Studies, Institute of Basic Medical Sciences and Tissue Engineering Research Center, Academy of Military Medical Sciences, No. 27, Taiping Road, Beijing, 100850, China.
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20
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Huang G, Li F, Zhao X, Ma Y, Li Y, Lin M, Jin G, Lu TJ, Genin GM, Xu F. Functional and Biomimetic Materials for Engineering of the Three-Dimensional Cell Microenvironment. Chem Rev 2017; 117:12764-12850. [PMID: 28991456 PMCID: PMC6494624 DOI: 10.1021/acs.chemrev.7b00094] [Citation(s) in RCA: 457] [Impact Index Per Article: 65.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The cell microenvironment has emerged as a key determinant of cell behavior and function in development, physiology, and pathophysiology. The extracellular matrix (ECM) within the cell microenvironment serves not only as a structural foundation for cells but also as a source of three-dimensional (3D) biochemical and biophysical cues that trigger and regulate cell behaviors. Increasing evidence suggests that the 3D character of the microenvironment is required for development of many critical cell responses observed in vivo, fueling a surge in the development of functional and biomimetic materials for engineering the 3D cell microenvironment. Progress in the design of such materials has improved control of cell behaviors in 3D and advanced the fields of tissue regeneration, in vitro tissue models, large-scale cell differentiation, immunotherapy, and gene therapy. However, the field is still in its infancy, and discoveries about the nature of cell-microenvironment interactions continue to overturn much early progress in the field. Key challenges continue to be dissecting the roles of chemistry, structure, mechanics, and electrophysiology in the cell microenvironment, and understanding and harnessing the roles of periodicity and drift in these factors. This review encapsulates where recent advances appear to leave the ever-shifting state of the art, and it highlights areas in which substantial potential and uncertainty remain.
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Affiliation(s)
- Guoyou Huang
- MOE Key Laboratory of Biomedical Information
Engineering, School of Life Science and Technology, Xi’an Jiaotong
University, Xi’an 710049, People’s Republic of China
- Bioinspired Engineering and Biomechanics Center
(BEBC), Xi’an Jiaotong University, Xi’an 710049, People’s
Republic of China
| | - Fei Li
- Bioinspired Engineering and Biomechanics Center
(BEBC), Xi’an Jiaotong University, Xi’an 710049, People’s
Republic of China
- Department of Chemistry, School of Science,
Xi’an Jiaotong University, Xi’an 710049, People’s Republic
of China
| | - Xin Zhao
- Bioinspired Engineering and Biomechanics Center
(BEBC), Xi’an Jiaotong University, Xi’an 710049, People’s
Republic of China
- Interdisciplinary Division of Biomedical
Engineering, The Hong Kong Polytechnic University, Hung Hom, Hong Kong,
People’s Republic of China
| | - Yufei Ma
- MOE Key Laboratory of Biomedical Information
Engineering, School of Life Science and Technology, Xi’an Jiaotong
University, Xi’an 710049, People’s Republic of China
- Bioinspired Engineering and Biomechanics Center
(BEBC), Xi’an Jiaotong University, Xi’an 710049, People’s
Republic of China
| | - Yuhui Li
- MOE Key Laboratory of Biomedical Information
Engineering, School of Life Science and Technology, Xi’an Jiaotong
University, Xi’an 710049, People’s Republic of China
- Bioinspired Engineering and Biomechanics Center
(BEBC), Xi’an Jiaotong University, Xi’an 710049, People’s
Republic of China
| | - Min Lin
- MOE Key Laboratory of Biomedical Information
Engineering, School of Life Science and Technology, Xi’an Jiaotong
University, Xi’an 710049, People’s Republic of China
- Bioinspired Engineering and Biomechanics Center
(BEBC), Xi’an Jiaotong University, Xi’an 710049, People’s
Republic of China
| | - Guorui Jin
- MOE Key Laboratory of Biomedical Information
Engineering, School of Life Science and Technology, Xi’an Jiaotong
University, Xi’an 710049, People’s Republic of China
- Bioinspired Engineering and Biomechanics Center
(BEBC), Xi’an Jiaotong University, Xi’an 710049, People’s
Republic of China
| | - Tian Jian Lu
- Bioinspired Engineering and Biomechanics Center
(BEBC), Xi’an Jiaotong University, Xi’an 710049, People’s
Republic of China
- MOE Key Laboratory for Multifunctional Materials
and Structures, Xi’an Jiaotong University, Xi’an 710049,
People’s Republic of China
| | - Guy M. Genin
- MOE Key Laboratory of Biomedical Information
Engineering, School of Life Science and Technology, Xi’an Jiaotong
University, Xi’an 710049, People’s Republic of China
- Bioinspired Engineering and Biomechanics Center
(BEBC), Xi’an Jiaotong University, Xi’an 710049, People’s
Republic of China
- Department of Mechanical Engineering &
Materials Science, Washington University in St. Louis, St. Louis 63130, MO,
USA
- NSF Science and Technology Center for
Engineering MechanoBiology, Washington University in St. Louis, St. Louis 63130,
MO, USA
| | - Feng Xu
- MOE Key Laboratory of Biomedical Information
Engineering, School of Life Science and Technology, Xi’an Jiaotong
University, Xi’an 710049, People’s Republic of China
- Bioinspired Engineering and Biomechanics Center
(BEBC), Xi’an Jiaotong University, Xi’an 710049, People’s
Republic of China
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21
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Sivakumar H, Strowd R, Skardal A. Exploration of Dynamic Elastic Modulus Changes on Glioblastoma Cell Populations with Aberrant EGFR Expression as a Potential Therapeutic Intervention Using a Tunable Hyaluronic Acid Hydrogel Platform. Gels 2017; 3:gels3030028. [PMID: 30920523 PMCID: PMC6318698 DOI: 10.3390/gels3030028] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2017] [Revised: 06/21/2017] [Accepted: 07/07/2017] [Indexed: 01/07/2023] Open
Abstract
Glioblastoma (GBM) is one of most aggressive forms of brain cancer, with a median survival time of 14.6 months following diagnosis. This low survival rate could in part be attributed to the lack of model systems of this type of cancer that faithfully recapitulate the tumor architecture and microenvironment seen in vivo in humans. Therapeutic studies would provide results that could be translated to the clinic efficiently. Here, we assess the role of the tumor microenvironment physical parameters on the tumor, and its potential use as a biomarker using a hyaluronic acid hydrogel system capable of elastic modulus tuning and dynamic elastic moduli changes. Experiments were conducted to assess the sensitivity of glioblastoma cell populations with different mutations to varying elastic moduli. Cells with aberrant epithelial growth factor receptor (EGFR) expression have a predilection for a stiffer environment, sensing these parameters through focal adhesion kinase (FAK). Importantly, the inhibition of FAK or EGFR generally resulted in reversed elastic modulus preference. Lastly, we explore the concept of therapeutically targeting the elastic modulus and dynamically reducing it via chemical or enzymatic degradation, both showing the capability to reduce or stunt proliferation rates of these GBM populations.
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Affiliation(s)
- Hemamylammal Sivakumar
- Wake Forest Institute for Regenerative Medicine, Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, NC 27157, USA.
| | - Roy Strowd
- Department of Neurology, Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, NC 27157, USA.
- Comprehensive Cancer Center at Wake Forest Baptist, Wake Forest Baptist Health Sciences, Medical Center Boulevard, Winston-Salem, NC 27157, USA.
| | - Aleksander Skardal
- Wake Forest Institute for Regenerative Medicine, Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, NC 27157, USA.
- Virginia Tech-Wake Forest School of Biomedical Engineering and Sciences, Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, NC 27157, USA.
- Department of Cancer Biology, Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, NC 27157, USA.
- Comprehensive Cancer Center at Wake Forest Baptist, Wake Forest Baptist Health Sciences, Medical Center Boulevard, Winston-Salem, NC 27157, USA.
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22
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Hybrid gels by conjugation of hyaluronic acid with poly(itaconic anhydride-co-3,9-divinyl-2,4,8,10-tetraoxaspiro (5.5)undecane) copolymers. Int J Biol Macromol 2017; 98:407-418. [DOI: 10.1016/j.ijbiomac.2017.01.116] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Revised: 01/11/2017] [Accepted: 01/25/2017] [Indexed: 01/08/2023]
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23
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Valdez J, Cook CD, Ahrens CC, Wang AJ, Brown A, Kumar M, Stockdale L, Rothenberg D, Renggli K, Gordon E, Lauffenburger D, White F, Griffith L. On-demand dissolution of modular, synthetic extracellular matrix reveals local epithelial-stromal communication networks. Biomaterials 2017; 130:90-103. [PMID: 28371736 DOI: 10.1016/j.biomaterials.2017.03.030] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Revised: 03/19/2017] [Accepted: 03/21/2017] [Indexed: 02/06/2023]
Abstract
Methods to parse paracrine epithelial-stromal communication networks are a vital need in drug development, as disruption of these networks underlies diseases ranging from cancer to endometriosis. Here, we describe a modular, synthetic, and dissolvable extracellular matrix (MSD-ECM) hydrogel that fosters functional 3D epithelial-stromal co-culture, and that can be dissolved on-demand to recover cells and paracrine signaling proteins intact for subsequent analysis. Specifically, synthetic polymer hydrogels, modified with cell-interacting adhesion motifs and crosslinked with peptides that include a substrate for cell-mediated proteolytic remodeling, can be rapidly dissolved by an engineered version of the microbial transpeptidase Sortase A (SrtA) if the crosslinking peptide includes a SrtA substrate motif and a soluble second substrate. SrtA-mediated dissolution affected only 1 of 31 cytokines and growth factors assayed, whereas standard protease degradation methods destroyed about half of these same molecules. Using co-encapsulated endometrial epithelial and stromal cells as one model system, we show that the dynamic cytokine and growth factor response of co-cultures to an inflammatory cue is richer and more nuanced when measured from SrtA-dissolved gel microenvironments than from the culture supernate. This system employs accessible, reproducible reagents and facile protocols; hence, has potential as a tool in identifying and validating therapeutic targets in complex diseases.
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Affiliation(s)
- Jorge Valdez
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Christi D Cook
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Caroline Chopko Ahrens
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA; Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Alex J Wang
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Alexander Brown
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Manu Kumar
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Linda Stockdale
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Daniel Rothenberg
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Kasper Renggli
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Elizabeth Gordon
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Douglas Lauffenburger
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA; Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA; Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Forest White
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Linda Griffith
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA; Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
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24
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Song JW, Zullo JA, Liveris D, Dragovich M, Zhang XF, Goligorsky MS. Therapeutic Restoration of Endothelial Glycocalyx in Sepsis. J Pharmacol Exp Ther 2017; 361:115-121. [PMID: 28167639 DOI: 10.1124/jpet.116.239509] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Accepted: 02/02/2017] [Indexed: 12/29/2022] Open
Abstract
Endothelial glycocalyx (EG) is disintegrated during sepsis. We have previously shown that this occurs very early in the course of sepsis and its prevention improves the survival of mice with sepsis. Here, we sought to investigate the possibility of pharmacologically accelerating the restoration of disintegrated EG in sepsis. We used a soilage injection model to induce polymicrobial sepsis in C57/BL6 mice and measured total body EG. En face aortic preparations were used for staining of markers of EG and atomic force microscopy was used to measure EG in vitro. In vitro studies were conducted in cultured endothelial cells either exposed to a lipopolysaccharide or enzymatically denuded of EG. Sulodexide (SDX), a heparin sulfate-like compound resistant to degradation by heparanase, accelerated EG regeneration in vitro and in vivo. The total volume of EG was drastically reduced in septic mice. Administration of SDX produced a dramatic acceleration of EG restoration. This effect, unrelated to any SDX-induced differences in microbial burden, was associated with better control of vascular permeability. Notably, SDX demonstrated not only a remarkable capacity for EG regeneration in vitro and in vivo but was also associated with improved animal survival, even when instituted 2 hours after induction of severe sepsis. In conclusion, 1) EG is disintegrated in sepsis, the event which contributes to high animal mortality; 2) pharmacologic acceleration of EG restoration can be achieved using SDX; and 3) SDX reduces vascular permeability, which is elevated in septic mice, and improves animal survival.
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Affiliation(s)
- J W Song
- Renal Research Institute and Departments of Medicine, Pharmacology and Physiology (J.A.Z., M.S.G.), and Department of Microbiology (D.L.), New York Medical College, Valhalla, New York; Department of Anesthesiology and Pain Medicine, Yonsei University College of Medicine, Seoul, South Korea (J.W.S.); and Department of Mechanical Engineering and Mechanics, and Bioengineering Program, Lehigh University, Bethlehem, Pennsylvania (M.D., X.F.Z.)
| | - J A Zullo
- Renal Research Institute and Departments of Medicine, Pharmacology and Physiology (J.A.Z., M.S.G.), and Department of Microbiology (D.L.), New York Medical College, Valhalla, New York; Department of Anesthesiology and Pain Medicine, Yonsei University College of Medicine, Seoul, South Korea (J.W.S.); and Department of Mechanical Engineering and Mechanics, and Bioengineering Program, Lehigh University, Bethlehem, Pennsylvania (M.D., X.F.Z.)
| | - D Liveris
- Renal Research Institute and Departments of Medicine, Pharmacology and Physiology (J.A.Z., M.S.G.), and Department of Microbiology (D.L.), New York Medical College, Valhalla, New York; Department of Anesthesiology and Pain Medicine, Yonsei University College of Medicine, Seoul, South Korea (J.W.S.); and Department of Mechanical Engineering and Mechanics, and Bioengineering Program, Lehigh University, Bethlehem, Pennsylvania (M.D., X.F.Z.)
| | - M Dragovich
- Renal Research Institute and Departments of Medicine, Pharmacology and Physiology (J.A.Z., M.S.G.), and Department of Microbiology (D.L.), New York Medical College, Valhalla, New York; Department of Anesthesiology and Pain Medicine, Yonsei University College of Medicine, Seoul, South Korea (J.W.S.); and Department of Mechanical Engineering and Mechanics, and Bioengineering Program, Lehigh University, Bethlehem, Pennsylvania (M.D., X.F.Z.)
| | - X F Zhang
- Renal Research Institute and Departments of Medicine, Pharmacology and Physiology (J.A.Z., M.S.G.), and Department of Microbiology (D.L.), New York Medical College, Valhalla, New York; Department of Anesthesiology and Pain Medicine, Yonsei University College of Medicine, Seoul, South Korea (J.W.S.); and Department of Mechanical Engineering and Mechanics, and Bioengineering Program, Lehigh University, Bethlehem, Pennsylvania (M.D., X.F.Z.)
| | - M S Goligorsky
- Renal Research Institute and Departments of Medicine, Pharmacology and Physiology (J.A.Z., M.S.G.), and Department of Microbiology (D.L.), New York Medical College, Valhalla, New York; Department of Anesthesiology and Pain Medicine, Yonsei University College of Medicine, Seoul, South Korea (J.W.S.); and Department of Mechanical Engineering and Mechanics, and Bioengineering Program, Lehigh University, Bethlehem, Pennsylvania (M.D., X.F.Z.)
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Zhou G, Han Q, Tai J, Liu B, Zhang J, Wang K, Ni X, Wang P, Liu X, Jiao A, Wang S, Li X, Zhang J, Fan Y. Digital light procession three-dimensional printing acrylate/collagen composite airway stent for tracheomalacia. J BIOACT COMPAT POL 2017. [DOI: 10.1177/0883911516686090] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Recently, more and more researchers have focused on airway stent applied in tracheomalacia. The airway stents for clinical application were usually manufactured in accordance with a fixed pattern, which were difficult to perfect match with children, especially infants. Digital light procession of light curing acrylate resin implantation showed higher accuracy and printing speed over traditional three-dimensional printing techniques. In this article, a novel personalized airway stent was developed by digital light procession three-dimensional printing and was modified by collagen I extracted from the fish scales. The morphology of the collagen-modified airway stent was examined by scanning electron microscopy, and the chemical structures were examined by attenuated total internal reflectance Fourier transform infrared spectroscopy. The biocompatibility of this synthetic acrylate/collagen composite airway stent was characterized by water contact angle test and cell culture. The results confirmed that the composite airway stent was hydrophilic and non-cytotoxic toward a cultured human bronchial epithelial cell line with good cell viability and show excellent physicochemical and biological properties. In conclusion, this study presented the three-dimensional printing composite acrylate and collagen airway stent may have potential in customized treatment for tracheomalacia.
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Affiliation(s)
- Gang Zhou
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University, Beijing, China
| | - Qianyi Han
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University, Beijing, China
| | - Jun Tai
- Beijing Key Laboratory for Pediatric Diseases of Otolaryngology, Head and Neck Surgery, Beijing Pediatric Research Institute, Beijing Children’s Hospital, Capital Medical University, Beijing, China
- Department of Otolaryngology, Head and Neck Surgery, Beijing Children’s Hospital, Capital Medical University, Beijing, China
| | - Beibei Liu
- School of Material Science and Engineering, Beihang University, Beijing, China
| | - Jing Zhang
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University, Beijing, China
| | - Kunpeng Wang
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University, Beijing, China
| | - Xin Ni
- Beijing Key Laboratory for Pediatric Diseases of Otolaryngology, Head and Neck Surgery, Beijing Pediatric Research Institute, Beijing Children’s Hospital, Capital Medical University, Beijing, China
- Department of Otolaryngology, Head and Neck Surgery, Beijing Children’s Hospital, Capital Medical University, Beijing, China
| | - Pengpeng Wang
- Beijing Key Laboratory for Pediatric Diseases of Otolaryngology, Head and Neck Surgery, Beijing Pediatric Research Institute, Beijing Children’s Hospital, Capital Medical University, Beijing, China
- Department of Otolaryngology, Head and Neck Surgery, Beijing Children’s Hospital, Capital Medical University, Beijing, China
| | - Xicheng Liu
- Beijing Key Laboratory for Pediatric Diseases of Otolaryngology, Head and Neck Surgery, Beijing Pediatric Research Institute, Beijing Children’s Hospital, Capital Medical University, Beijing, China
- Department of Otolaryngology, Head and Neck Surgery, Beijing Children’s Hospital, Capital Medical University, Beijing, China
| | - Anxia Jiao
- Beijing Key Laboratory for Pediatric Diseases of Otolaryngology, Head and Neck Surgery, Beijing Pediatric Research Institute, Beijing Children’s Hospital, Capital Medical University, Beijing, China
- Department of Otolaryngology, Head and Neck Surgery, Beijing Children’s Hospital, Capital Medical University, Beijing, China
| | - Shengcai Wang
- Beijing Key Laboratory for Pediatric Diseases of Otolaryngology, Head and Neck Surgery, Beijing Pediatric Research Institute, Beijing Children’s Hospital, Capital Medical University, Beijing, China
- Department of Otolaryngology, Head and Neck Surgery, Beijing Children’s Hospital, Capital Medical University, Beijing, China
| | - Xiaodan Li
- Beijing Key Laboratory for Pediatric Diseases of Otolaryngology, Head and Neck Surgery, Beijing Pediatric Research Institute, Beijing Children’s Hospital, Capital Medical University, Beijing, China
- Department of Otolaryngology, Head and Neck Surgery, Beijing Children’s Hospital, Capital Medical University, Beijing, China
| | - Jie Zhang
- Beijing Key Laboratory for Pediatric Diseases of Otolaryngology, Head and Neck Surgery, Beijing Pediatric Research Institute, Beijing Children’s Hospital, Capital Medical University, Beijing, China
- Department of Otolaryngology, Head and Neck Surgery, Beijing Children’s Hospital, Capital Medical University, Beijing, China
| | - Yubo Fan
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University, Beijing, China
- National Research Center for Rehabilitation Technical Aids, Beijing, China
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26
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Kheirabadi M, Shi L, Bagheri R, Kabiri K, Hilborn J, Ossipov DA. In situ forming interpenetrating hydrogels of hyaluronic acid hybridized with iron oxide nanoparticles. Biomater Sci 2017; 3:1466-74. [PMID: 26247066 DOI: 10.1039/c5bm00150a] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Four derivatives of hyaluronic acid (HA) bearing thiol (HA-SH), hydrazide (HA-hy), 2-dithiopyridyl (HA-SSPy), and aldehyde groups (HA-al) respectively were synthesized. Thiol and 2-dithiopyridyl as well as hydrazide and aldehyde make up two chemically orthogonal pairs of chemo-selective functionalities that allow in situ formation of interpenetrating (IPN) disulfide and hydrazone networks simultaneously upon the mixing of the above derivatives at once. The formation of IPN was demonstrated by comparing it with the formulations of the same total HA concentration but lacking one of the reactive components. The hydrogel composed of all four components was characterized by a larger elastic modulus than those of the control single networks (either disulfide or hydrazone) and the three component formulations gave the softest hydrogels. Moreover, a hydrazone cross-linkage was designed to contain a 1,2-diol fragment. This allowed us to partially disassemble one type of network in the IPN leaving another one unaffected. In particular, treatment of the IPN with either sodium periodate or dithiothreitol resulted in disassembly of the hydrazone and disulfide networks respectively and thus softening of the hydrogel. Contrarily, the single network hydrogels completely dissolved under the corresponding conditions. In corroboration with this, enzymatic degradation of the IPN by hyaluronidase was also substantially slower than the degradation of the single networks. In order to further improve the mechanical properties of the elaborated injectable IPN, it has been in situ hybridized with iron oxide nanoparticles (IONPs). The mesh size of the IPN was smaller than the size of the IONPs resulting in the retention of nanoparticles in the matrix under equilibrium swelling conditions. However, these nanoparticles were released upon enzymatic degradation suggesting their use as MRI tags for non-invasive tracking of the hydrogel material in vivo. Additionally, this injectable hybridized hydrogel with encapsulated IONPs can be used in hyperthermia cancer therapy.
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Affiliation(s)
- Malihe Kheirabadi
- Institute for Nanoscience and Nanotechnology, Sharif University of Technology, Azadi Street, P.O. Box 11155-8639, Tehran, Iran
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Challenges for Cartilage Regeneration. SPRINGER SERIES IN BIOMATERIALS SCIENCE AND ENGINEERING 2017. [DOI: 10.1007/978-3-662-53574-5_14] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Kim K, Park JH, Park SH, Lee HY, Kim JH, Kim MS. An Injectable, Click-Cross-Linked Small Intestinal Submucosa Drug Depot for the Treatment of Rheumatoid Arthritis. Adv Healthc Mater 2016; 5:3105-3117. [PMID: 27900853 DOI: 10.1002/adhm.201601040] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2016] [Revised: 10/26/2016] [Indexed: 01/08/2023]
Abstract
Here, a click-cross-linked small intestine submucosa (SIS) drug depot is described for the treatment of rheumatoid arthritis (RA). To the best of the knowledge, there have been no studies related to the intra-articular injection of methotrexate (Met)-loaded click-cross-linkable SIS (Met-loaded Cx-SIS) for RA treatment. As the key objective of this work, injectable formulations of tetrazine-modified SIS (TE-SIS) and transcyclooctene-modified SIS (TC-SIS) are employed as drug depots. Within a few seconds, the simple mixing of equal amounts of TE-SIS and TC-SIS suspensions forms a gelatinous click-cross-linked SIS (Cx-SIS) drug depot in vitro and in vivo. The formed Cx-SIS depot is maintained in the articular joint over an extended period, while SIS alone rapidly disappears. Injectable formulations of Met-loaded Cx-SIS and Met-loaded SIS are prepared and then injected into articular joints to form drug depots. Compared to animals treated with Met-loaded SIS, RA animals treated with Met-loaded Cx-SIS show effective RA repair, as well as extensive regeneration of chondrocytes and glycosaminoglycan deposits. Collectively, these results indicate that the Met-loaded Cx-SIS depot is successfully formed after intra-articular injection of click-cross-linkable SIS, and that this formulation induces long-lasting Met release and allows Met to act effectively in the articular joint, resulting in RA repair.
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Affiliation(s)
- Kyungsook Kim
- Department of Molecular Science and Technology; Ajou University; Suwon 443-759 Korea
| | - Ji Hoon Park
- Department of Molecular Science and Technology; Ajou University; Suwon 443-759 Korea
| | - Seung Hun Park
- Department of Molecular Science and Technology; Ajou University; Suwon 443-759 Korea
| | - Hye Yun Lee
- Department of Molecular Science and Technology; Ajou University; Suwon 443-759 Korea
| | - Jae Ho Kim
- Department of Molecular Science and Technology; Ajou University; Suwon 443-759 Korea
| | - Moon Suk Kim
- Department of Molecular Science and Technology; Ajou University; Suwon 443-759 Korea
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29
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Xu Q, He C, Zhang Z, Ren K, Chen X. Injectable, Biomolecule-Responsive Polypeptide Hydrogels for Cell Encapsulation and Facile Cell Recovery through Triggered Degradation. ACS APPLIED MATERIALS & INTERFACES 2016; 8:30692-30702. [PMID: 27762560 DOI: 10.1021/acsami.6b08292] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Injectable hydrogels have been widely investigated in biomedical applications, and increasing demand has been proposed to achieve dynamic regulation of physiological properties of hydrogels. Herein, a new type of injectable and biomolecule-responsive hydrogel based on poly(l-glutamic acid) (PLG) grafted with disulfide bond-modified phloretic acid (denoted as PLG-g-CPA) was developed. The hydrogels formed in situ via enzymatic cross-linking under physiological conditions in the presence of horseradish peroxidase and hydrogen peroxide. The physiochemical properties of the hydrogels, including gelation time and the rheological property, were measured. Particularly, the triggered degradation of the hydrogel in response to a reductive biomolecule, glutathione (GSH), was investigated in detail. The mechanical strength and inner porous structure of the hydrogel were influenced by the addition of GSH. The polypeptide hydrogel was used as a three-dimensional (3D) platform for cell encapsulation, which could release the cells through triggered disruption of the hydrogel in response to the addition of GSH. The cells released from the hydrogel were found to maintain high viability. Moreover, after subcutaneous injection into rats, the PLG-g-CPA hydrogels with disulfide-containing cross-links exhibited a markedly faster degradation behavior in vivo compared to that of the PLG hydrogels without disulfide cross-links, implying an interesting accelerated degradation process of the disulfide-containing polypeptide hydrogels in the physiological environment in vivo. Overall, the injectable and biomolecule-responsive polypeptide hydrogels may serve as a potential platform for 3D cell culture and easy cell collection.
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Affiliation(s)
- Qinghua Xu
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences , Changchun 130022, P.R. China
- University of Chinese Academy of Sciences , Beijing 100039, P.R. China
| | - Chaoliang He
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences , Changchun 130022, P.R. China
| | - Zhen Zhang
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences , Changchun 130022, P.R. China
- University of Chinese Academy of Sciences , Beijing 100039, P.R. China
| | - Kaixuan Ren
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences , Changchun 130022, P.R. China
| | - Xuesi Chen
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences , Changchun 130022, P.R. China
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Freudenberg U, Liang Y, Kiick KL, Werner C. Glycosaminoglycan-Based Biohybrid Hydrogels: A Sweet and Smart Choice for Multifunctional Biomaterials. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2016; 28:8861-8891. [PMID: 27461855 PMCID: PMC5152626 DOI: 10.1002/adma.201601908] [Citation(s) in RCA: 122] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2016] [Revised: 05/30/2016] [Indexed: 05/12/2023]
Abstract
Glycosaminoglycans (GAGs) govern important functional characteristics of the extracellular matrix (ECM) in living tissues. Incorporation of GAGs into biomaterials opens up new routes for the presentation of signaling molecules, providing control over development, homeostasis, inflammation, and tumor formation and progression. Recent approaches to GAG-based materials are reviewed, highlighting the formation of modular, tunable biohybrid hydrogels by covalent and non-covalent conjugation schemes, including both theory-driven design concepts and advanced processing technologies. Examples of the application of the resulting materials in biomedical studies are provided. For perspective, solid-phase and chemoenzymatic oligosaccharide synthesis methods for GAG-derived motifs, rational and high-throughput design strategies for GAG-based materials, and the utilization of the factor-scavenging characteristics of GAGs are highlighted.
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Affiliation(s)
- Uwe Freudenberg
- Leibniz Institute of Polymer Research Dresden (IPF), Max Bergmann Center of Biomaterials Dresden (MBC), Technische Universität Dresden, Center for Regenerative Therapies Dresden (CRTD), Hohe Str. 6, 01069 Dresden, Germany
| | - Yingkai Liang
- Department of Materials Science and Engineering and Department of Biomedical Engineering, University of Delaware, Newark, Delaware 19716, United States,
| | - Kristi L. Kiick
- Department of Materials Science and Engineering and Department of Biomedical Engineering, University of Delaware, Newark, Delaware 19716, United States and Delaware Biotechnology Institute, 15 Innovation Way, Newark, Delaware 19716, United States
| | - Carsten Werner
- Leibniz Institute of Polymer Research Dresden (IPF), Max Bergmann Center of Biomaterials Dresden (MBC), Technische Universität Dresden, Center for Regenerative Therapies Dresden (CRTD), Hohe Str. 6, 01069 Dresden, Germany
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31
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Skardal A, Devarasetty M, Forsythe S, Atala A, Soker S. A reductionist metastasis-on-a-chip platform for in vitro tumor progression modeling and drug screening. Biotechnol Bioeng 2016; 113:2020-32. [PMID: 26888480 PMCID: PMC5778914 DOI: 10.1002/bit.25950] [Citation(s) in RCA: 150] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2015] [Revised: 01/26/2016] [Accepted: 02/10/2016] [Indexed: 01/10/2023]
Abstract
Current animal and 2-D cell culture models employed in metastasis research and drug discovery remain poor mimics of human cancer physiology. Here we describe a "metastasis-on-a-chip" system allowing real time tracking of fluorescent colon cancer cells migrating from hydrogel-fabricated gut constructs to downstream liver constructs within a circulatory fluidic device system that responds to environmental manipulation and drug treatment. Devices consist of two chambers in which gut and liver constructs are housed independently, but are connected in series via circulating fluid flow. Constructs were biofabricated with a hyaluronic acid-based hydrogel system, capable of a variety of customizations, inside of which representative host tissue cells were suspended and metastatic colon carcinoma tumor foci were created. The host tissue of the constructs expressed normal epithelial markers, which the tumor foci failed to express. Instead, tumor regions lost membrane-bound adhesion markers, and expressed mesenchymal and proliferative markers, suggesting a metastatic phenotype. Metastatic tumor foci grew in size, eventually disseminating from the intestine construct and entering circulation, subsequently reaching in the liver construct, thus mimicking some of the migratory events observed during metastasis. Lastly, we demonstrated the ability to manipulate the system, including chemically modulating the hydrogel system mechanical properties and administering chemotherapeutic agents, and evaluated the effects of these parameters on invasive tumor migration. These results describe the capability of this early stage metastasis-on-a-chip system to model several important characteristics of human metastasis, thereby demonstrating the potential of the platform for making meaningful advances in cancer investigation and drug discovery. Biotechnol. Bioeng. 2016;113: 2020-2032. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Aleksander Skardal
- Wake Forest Institute for Regenerative Medicine, Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, North Carolina.
- Virginia Tech-Wake Forest University School of Biomedical Engineering and Sciences, Wake Forest Baptist Health, Medical Center Boulevard, Winston-Salem, North Carolina.
- Department of Cancer Biology, Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, North Carolina 27157.
| | - Mahesh Devarasetty
- Wake Forest Institute for Regenerative Medicine, Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, North Carolina
- Virginia Tech-Wake Forest University School of Biomedical Engineering and Sciences, Wake Forest Baptist Health, Medical Center Boulevard, Winston-Salem, North Carolina
| | - Steven Forsythe
- Wake Forest Institute for Regenerative Medicine, Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, North Carolina
| | - Anthony Atala
- Wake Forest Institute for Regenerative Medicine, Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, North Carolina
- Virginia Tech-Wake Forest University School of Biomedical Engineering and Sciences, Wake Forest Baptist Health, Medical Center Boulevard, Winston-Salem, North Carolina
| | - Shay Soker
- Wake Forest Institute for Regenerative Medicine, Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, North Carolina
- Virginia Tech-Wake Forest University School of Biomedical Engineering and Sciences, Wake Forest Baptist Health, Medical Center Boulevard, Winston-Salem, North Carolina
- Department of Cancer Biology, Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, North Carolina 27157
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Skardal A, Shupe T, Atala A. Organoid-on-a-chip and body-on-a-chip systems for drug screening and disease modeling. Drug Discov Today 2016; 21:1399-1411. [PMID: 27422270 DOI: 10.1016/j.drudis.2016.07.003] [Citation(s) in RCA: 301] [Impact Index Per Article: 37.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Revised: 06/30/2016] [Accepted: 07/05/2016] [Indexed: 01/09/2023]
Abstract
In recent years, advances in tissue engineering and microfabrication technologies have enabled rapid growth in the areas of in vitro organoid development as well as organoid-on-a-chip platforms. These 3D model systems often are able to mimic human physiology more accurately than traditional 2D cultures and animal models. In this review, we describe the progress that has been made to generate organ-on-a-chip platforms and, more recently, more complex multi-organoid body-on-a-chip platforms and their applications. Importantly, these systems have the potential to dramatically impact biomedical applications in the areas of drug development, drug and toxicology screening, disease modeling, and the emerging area of personalized precision medicine.
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Affiliation(s)
- Aleksander Skardal
- Wake Forest Institute for Regenerative Medicine, Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, NC 27157, USA; Virginia Tech-Wake Forest University School of Biomedical Engineering and Sciences, Wake Forest Baptist Health, Medical Center Boulevard, Winston-Salem, NC 27157, USA; Department of Cancer Biology, Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, NC 27157, USA.
| | - Thomas Shupe
- Wake Forest Institute for Regenerative Medicine, Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, NC 27157, USA
| | - Anthony Atala
- Wake Forest Institute for Regenerative Medicine, Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, NC 27157, USA; Virginia Tech-Wake Forest University School of Biomedical Engineering and Sciences, Wake Forest Baptist Health, Medical Center Boulevard, Winston-Salem, NC 27157, USA; Department of Urology, Wake Forest Baptist Medical Center, Medical Center Boulevard, Winston-Salem, NC 27157, USA
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Li C, Qian Y, Zhao S, Yin Y, Li J. Alginate/PEG based microcarriers with cleavable crosslinkage for expansion and non-invasive harvest of human umbilical cord blood mesenchymal stem cells. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 64:43-53. [DOI: 10.1016/j.msec.2016.03.089] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2015] [Revised: 03/21/2016] [Accepted: 03/23/2016] [Indexed: 12/18/2022]
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Skardal A, Murphy SV, Crowell K, Mack D, Atala A, Soker S. A tunable hydrogel system for long-term release of cell-secreted cytokines and bioprinted in situ wound cell delivery. J Biomed Mater Res B Appl Biomater 2016; 105:1986-2000. [PMID: 27351939 DOI: 10.1002/jbm.b.33736] [Citation(s) in RCA: 78] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Revised: 05/18/2016] [Accepted: 06/06/2016] [Indexed: 12/21/2022]
Abstract
For many cellular therapies being evaluated in preclinical and clinical trials, the mechanisms behind their therapeutic effects appear to be the secretion of growth factors and cytokines, also known as paracrine activity. Often, delivered cells are transient, and half-lives of the growth factors that they secrete are short, limiting their long-term effectiveness. The goal of this study was to optimize a hydrogel system capable of in situ cell delivery that could sequester and release growth factors secreted from those cells after the cells were no longer present. Here, we demonstrate the use of a fast photocross-linkable heparin-conjugated hyaluronic acid (HA-HP) hydrogel as a cell delivery vehicle for sustained growth factor release, which extends paracrine activity. The hydrogel could be modulated through cross-linking geometries and heparinization to support sustained release proteins and heparin-binding growth factors. To test the hydrogel in vivo, we used it to deliver amniotic fluid-derived stem (AFS) cells, which are known to secrete cytokines and growth factors, in full thickness skin wounds in a nu/nu murine model. Despite transience of the AFS cells in vivo, the HA-HP hydrogel with AFS cells improved wound closure and reepithelialization and increased vascularization and production of extracellular matrix in vivo. These results suggest that HA-HP hydrogel has the potential to prolong the paracrine activity of cells, thereby increasing their therapeutic effectiveness in wound healing. © 2016 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 105B: 1986-2000, 2017.
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Affiliation(s)
- Aleksander Skardal
- Wake Forest Institute for Regenerative Medicine, Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, North Carolina.,Department of Biomedical Engineering, Virginia Tech-Wake Forest University School of Biomedical Engineering and Sciences, Wake Forest Baptist Health, Medical Center Boulevard, Winston-Salem, North Carolina.,Department of Cancer Biology, Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, North Carolina
| | - Sean V Murphy
- Wake Forest Institute for Regenerative Medicine, Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, North Carolina
| | - Kathryn Crowell
- Wake Forest Institute for Regenerative Medicine, Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, North Carolina
| | - David Mack
- Department of Rehabilitation Medicine, Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, Washington.,Department of Bioengineering, University of Washington, Seattle, Washington
| | - Anthony Atala
- Wake Forest Institute for Regenerative Medicine, Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, North Carolina.,Department of Biomedical Engineering, Virginia Tech-Wake Forest University School of Biomedical Engineering and Sciences, Wake Forest Baptist Health, Medical Center Boulevard, Winston-Salem, North Carolina
| | - Shay Soker
- Wake Forest Institute for Regenerative Medicine, Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, North Carolina.,Department of Biomedical Engineering, Virginia Tech-Wake Forest University School of Biomedical Engineering and Sciences, Wake Forest Baptist Health, Medical Center Boulevard, Winston-Salem, North Carolina.,Department of Cancer Biology, Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, North Carolina
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Skardal A, Devarasetty M, Kang HW, Seol YJ, Forsythe SD, Bishop C, Shupe T, Soker S, Atala A. Bioprinting Cellularized Constructs Using a Tissue-specific Hydrogel Bioink. J Vis Exp 2016:e53606. [PMID: 27166839 DOI: 10.3791/53606] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Bioprinting has emerged as a versatile biofabrication approach for creating tissue engineered organ constructs. These constructs have potential use as organ replacements for implantation in patients, and also, when created on a smaller size scale as model "organoids" that can be used in in vitro systems for drug and toxicology screening. Despite development of a wide variety of bioprinting devices, application of bioprinting technology can be limited by the availability of materials that both expedite bioprinting procedures and support cell viability and function by providing tissue-specific cues. Here we describe a versatile hyaluronic acid (HA) and gelatin-based hydrogel system comprised of a multi-crosslinker, 2-stage crosslinking protocol, which can provide tissue specific biochemical signals and mimic the mechanical properties of in vivo tissues. Biochemical factors are provided by incorporating tissue-derived extracellular matrix materials, which include potent growth factors. Tissue mechanical properties are controlled combinations of PEG-based crosslinkers with varying molecular weights, geometries (linear or multi-arm), and functional groups to yield extrudable bioinks and final construct shear stiffness values over a wide range (100 Pa to 20 kPa). Using these parameters, hydrogel bioinks were used to bioprint primary liver spheroids in a liver-specific bioink to create in vitro liver constructs with high cell viability and measurable functional albumin and urea output. This methodology provides a general framework that can be adapted for future customization of hydrogels for biofabrication of a wide range of tissue construct types.
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Affiliation(s)
- Aleksander Skardal
- Wake Forest Institute for Regenerative Medicine, Wake Forest Univeristy Health Sciences;
| | - Mahesh Devarasetty
- Wake Forest Institute for Regenerative Medicine, Wake Forest Univeristy Health Sciences
| | - Hyun-Wook Kang
- Wake Forest Institute for Regenerative Medicine, Wake Forest Univeristy Health Sciences
| | - Young-Joon Seol
- Wake Forest Institute for Regenerative Medicine, Wake Forest Univeristy Health Sciences
| | - Steven D Forsythe
- Wake Forest Institute for Regenerative Medicine, Wake Forest Univeristy Health Sciences
| | - Colin Bishop
- Wake Forest Institute for Regenerative Medicine, Wake Forest Univeristy Health Sciences
| | - Thomas Shupe
- Wake Forest Institute for Regenerative Medicine, Wake Forest Univeristy Health Sciences
| | - Shay Soker
- Wake Forest Institute for Regenerative Medicine, Wake Forest Univeristy Health Sciences
| | - Anthony Atala
- Wake Forest Institute for Regenerative Medicine, Wake Forest Univeristy Health Sciences
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Ranga A, Lutolf MP, Hilborn J, Ossipov DA. Hyaluronic Acid Hydrogels Formed in Situ by Transglutaminase-Catalyzed Reaction. Biomacromolecules 2016; 17:1553-60. [DOI: 10.1021/acs.biomac.5b01587] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Adrian Ranga
- Laboratory
of Stem Cell Bioengineering, Institute of Bioengineering, School of
Life Sciences and School of Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne CH 1015, Switzerland
- Biomechanics
Section, Mechanical Engineering Department, KU Leuven, Celestijnenlaan
300, Leuven 3001, Belgium
| | - Matthias P. Lutolf
- Laboratory
of Stem Cell Bioengineering, Institute of Bioengineering, School of
Life Sciences and School of Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne CH 1015, Switzerland
- Institute
of Chemical Sciences and Engineering, School of Basic Sciences, EFFL, Lausanne, CH 1015, Switzerland
| | - Jöns Hilborn
- Science
for Life Laboratory, Division of Polymer Chemistry, Department of
Chemistry-Ångström, Uppsala University, Uppsala SE 751 21, Sweden
| | - Dmitri A. Ossipov
- Science
for Life Laboratory, Division of Polymer Chemistry, Department of
Chemistry-Ångström, Uppsala University, Uppsala SE 751 21, Sweden
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An Optimized Injectable Hydrogel Scaffold Supports Human Dental Pulp Stem Cell Viability and Spreading. Adv Med 2016; 2016:7363579. [PMID: 27294191 PMCID: PMC4884792 DOI: 10.1155/2016/7363579] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/16/2015] [Revised: 04/03/2016] [Accepted: 04/11/2016] [Indexed: 11/17/2022] Open
Abstract
Introduction. HyStem-C™ is a commercially available injectable hydrogel composed of polyethylene glycol diacrylate (PEGDA), hyaluronan (HA), and gelatin (Gn). These components can be mechanically tuned to enhance cell viability and spreading. Methods. The concentration of PEGDA with an added disulfide bond (PEGSSDA) was varied from 0.5 to 8.0% (w/v) to determine the optimal concentration for injectable clinical application. We evaluated the cell viability of human dental pulp stem cells (hDPSCs) embedded in 2% (w/v) PEGSSDA-HA-Gn hydrogels. Volume ratios of HA : Gn from 100 : 0 to 25 : 75 were varied to encourage hDPSC spreading. Fibronectin (Fn) was added to our model to determine the effect of extracellular matrix protein concentration on hDPSC behavior. Results. Our preliminary data suggests that the hydrogel gelation time decreased as the PEGSSDA cross-linker concentration increased. The PEGSSDA-HA-Gn was biocompatible with hDPSCs, and increased ratios of HA : Gn enhanced cell viability for 14 days. Additionally, cell proliferation with added fibronectin increased significantly over time at concentrations of 1.0 and 10.0 μg/mL in PEGDA-HA-Gn hydrogels, while cell spreading significantly increased at Fn concentrations of 0.1 μg/mL. Conclusions. This study demonstrates that PEG-based injectable hydrogels maintain hDPSC viability and facilitate cell spreading, mainly in the presence of extracellular matrix (ECM) proteins.
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Non-invasive in vitro and in vivo monitoring of degradation of fluorescently labeled hyaluronan hydrogels for tissue engineering applications. Acta Biomater 2016; 30:188-198. [PMID: 26621694 DOI: 10.1016/j.actbio.2015.11.053] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2015] [Revised: 11/04/2015] [Accepted: 11/23/2015] [Indexed: 12/25/2022]
Abstract
Tracking of degradation of hydrogels-based biomaterials in vivo is very important for rational design of tissue engineering scaffolds that act as delivery carriers for bioactive factors. During the process of tissue development, an ideal scaffold should remodel at a rate matching with scaffold degradation. To reduce amount of animals sacrificed, non-invasive in vivo imaging of biomaterials is required which relies on using of biocompatible and in situ gel forming compounds carrying suitable imaging agents. In this study we developed a method of in situ fabrication of fluorescently labeled and injectable hyaluronan (HA) hydrogel based on one pot sequential use of Michael addition and thiol-disulfide exchange reactions for the macromolecules labeling and cross-linking respectively. Hydrogels with different content of HA were prepared and their enzymatic degradation was followed in vitro and in vivo using fluorescence multispectral imaging. First, we confirmed that the absorbance of the matrix-linked near-IR fluorescent IRDye® 800CW agent released due to the matrix enzymatic degradation in vitro matched the amount of the degraded hydrogel measured by classical gravimetric method. Secondly, the rate of degradation was inversely proportional to the hydrogel concentration and this structure-degradation relationship was similar for both in vitro and in vivo studies. It implies that the degradation of this disulfide cross-linked hyaluronan hydrogel in vivo can be predicted basing on the results of its in vitro degradation studies. The compliance of in vitro and in vivo methods is also promising for the future development of predictive in vitro tissue engineering models. STATEMENT OF SIGNIFICANCE The need for engineered hydrogel scaffolds that deliver bioactive factors to endogenous progenitor cells in vivo via gradual matrix resorption and thus facilitate tissue regeneration is increasing with the aging population. Importantly, scaffold should degrade at a modest rate that will not be too fast to support tissue growth nor too slow to provide space for tissue development. The present work is devoted to longitudinal tracking of a hydrogel material in vivo from the time of its implantation to the time of complete resorption without sacrificing animals. The method demonstrates correlation of resorption rates in vivo and in vitro for hydrogels with varied structural parameters. It opens the possibility to develop predictive in vitro models for tissue engineered scaffolds and reduce animal studies.
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Kar M, Vernon Shih YR, Velez DO, Cabrales P, Varghese S. Poly(ethylene glycol) hydrogels with cell cleavable groups for autonomous cell delivery. Biomaterials 2015; 77:186-97. [PMID: 26606444 DOI: 10.1016/j.biomaterials.2015.11.018] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2015] [Revised: 11/05/2015] [Accepted: 11/06/2015] [Indexed: 12/20/2022]
Abstract
Cell-responsive hydrogels hold tremendous potential as cell delivery devices in regenerative medicine. In this study, we developed a hydrogel-based cell delivery vehicle, in which the encapsulated cell cargo control its own release from the vehicle in a protease-independent manner. Specifically, we have synthesized a modified poly(ethylene glycol) (PEG) hydrogel that undergoes degradation responding to cell-secreted molecules by incorporating disulfide moieties onto the backbone of the hydrogel precursor. Our results show the disulfide-modified PEG hydrogels disintegrate seamlessly into solution in presence of cells without any external stimuli. The rate of hydrogel degradation, which ranges from hours to months, is found to be dependent upon the type of encapsulated cells, cell number, and fraction of disulfide moieties present in the hydrogel backbone. The differentiation potential of human mesenchymal stem cells released from the hydrogels is maintained in vitro. The in vivo analysis of these cell-laden hydrogels, through a dorsal window chamber and intramuscular implantation, demonstrated autonomous release of cells to the host environment. The hydrogel-mediated implantation of cells resulted in higher cell retention within the host tissue when compared to that without a biomaterial support. Biomaterials that function as a shield to protect cell cargos and assist their delivery in response to signals from the encapsulated cells could have a wide utility in cell transplantation and could improve the therapeutic outcomes of cell-based therapies.
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Affiliation(s)
- Mrityunjoy Kar
- Department of Bioengineering, University of California, San Diego, La Jolla, CA, USA
| | - Yu-Ru Vernon Shih
- Department of Bioengineering, University of California, San Diego, La Jolla, CA, USA
| | - Daniel Ortiz Velez
- Department of Bioengineering, University of California, San Diego, La Jolla, CA, USA
| | - Pedro Cabrales
- Department of Bioengineering, University of California, San Diego, La Jolla, CA, USA
| | - Shyni Varghese
- Department of Bioengineering, University of California, San Diego, La Jolla, CA, USA.
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Skardal A, Devarasetty M, Kang HW, Mead I, Bishop C, Shupe T, Lee SJ, Jackson J, Yoo J, Soker S, Atala A. A hydrogel bioink toolkit for mimicking native tissue biochemical and mechanical properties in bioprinted tissue constructs. Acta Biomater 2015. [PMID: 26210285 DOI: 10.1016/j.actbio.2015.07.030] [Citation(s) in RCA: 259] [Impact Index Per Article: 28.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Advancement of bioprinting technology is limited by the availability of materials that both facilitate bioprinting logistics as well as support cell viability and function by providing tissue-specific cues. Herein we describe a modular hyaluronic acid (HA) and gelatin-based hydrogel toolbox comprised of a 2-crosslinker, 2-stage polymerization technique, and the capability to provide tissue specific biochemically and mechanically accurate signals to cells within biofabricated tissue constructs. First, we prepared and characterized several tissue-derived decellularized extracellular matrix-based solutions, which contain complex combinations of growth factors, collagens, glycosaminoglycans, and elastin. These solutions can be incorporated into bioinks to provide the important biochemical cues of different tissue types. Second, we employed combinations of PEG-based crosslinkers with varying molecular weights, geometries (linear, 4-arm, and 8-arm), and functional groups to yield hydrogel bioinks that supported extrusion bioprinting and the capability to achieve final construct shear stiffness values ranging from approximately 100 Pa to 20 kPa. Lastly, we integrated these hydrogel bioinks with a 3-D bioprinting platform, and validated their use by bioprinting primary liver spheroids in a liver-specific bioink to create in vitro liver constructs with high cell viability and measurable functional albumin and urea output. This hydrogel bioink system has the potential to be a versatile tool for biofabrication of a wide range of tissue construct types. STATEMENT OF SIGNIFICANCE Biochemical and mechanical factors both have important implications in guiding the behavior of cells in vivo, yet both realms are rarely considered together in the context of biofabrication in vitro tissue construct models. We describe a modular hydrogel system that (1) facilitates extrusion bioprinting of cell-laden hydrogels, (2) incorporates tissue-specific factors derived from decellularized tissue extracellular matrix, thus mimicking biochemical tissue profile, and (3) allows control over mechanical properties to mimic the tissue stiffness. We believe that employing this technology to attend to both the biochemical and mechanical profiles of tissues, will allow us to more accurately recapitulate the in vivo environment of tissues while creating functional 3-D in vitro tissue constructs that can be used as disease models, personalized medicine, and in vitro drug and toxicology screening systems.
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41
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Skardal A, Devarasetty M, Soker S, Hall AR. In situ patterned micro 3D liver constructs for parallel toxicology testing in a fluidic device. Biofabrication 2015; 7:031001. [PMID: 26355538 DOI: 10.1088/1758-5090/7/3/031001] [Citation(s) in RCA: 68] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
3D tissue models are increasingly being implemented for drug and toxicology testing. However, the creation of tissue-engineered constructs for this purpose often relies on complex biofabrication techniques that are time consuming, expensive, and difficult to scale up. Here, we describe a strategy for realizing multiple tissue constructs in a parallel microfluidic platform using an approach that is simple and can be easily scaled for high-throughput formats. Liver cells mixed with a UV-crosslinkable hydrogel solution are introduced into parallel channels of a sealed microfluidic device and photopatterned to produce stable tissue constructs in situ. The remaining uncrosslinked material is washed away, leaving the structures in place. By using a hydrogel that specifically mimics the properties of the natural extracellular matrix, we closely emulate native tissue, resulting in constructs that remain stable and functional in the device during a 7-day culture time course under recirculating media flow. As proof of principle for toxicology analysis, we expose the constructs to ethyl alcohol (0-500 mM) and show that the cell viability and the secretion of urea and albumin decrease with increasing alcohol exposure, while markers for cell damage increase.
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Affiliation(s)
- Aleksander Skardal
- Wake Forest Institute for Regenerative Medicine, Wake Forest Baptist Health, Medical Center Boulevard, Winston-Salem, NC 27157, USA. Virginia Tech-Wake Forest University School of Biomedical Engineering and Sciences, Wake Forest Baptist Health, Medical Center Boulevard, Winston-Salem, NC 27157, USA. Comprehensive Cancer Center, Wake Forest Baptist Health, Medical Center Boulevard, Winston-Salem, NC 27157, USA
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42
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Zullo JA, Nadel EP, Rabadi MM, Baskind MJ, Rajdev MA, Demaree CM, Vasko R, Chugh SS, Lamba R, Goligorsky MS, Ratliff BB. The Secretome of Hydrogel-Coembedded Endothelial Progenitor Cells and Mesenchymal Stem Cells Instructs Macrophage Polarization in Endotoxemia. Stem Cells Transl Med 2015; 4:852-61. [PMID: 25947337 DOI: 10.5966/sctm.2014-0111] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2014] [Accepted: 03/16/2015] [Indexed: 01/27/2023] Open
Abstract
UNLABELLED : We previously reported the delivery of endothelial progenitor cells (EPCs) embedded in hyaluronic acid-based (HA)-hydrogels protects renal function during acute kidney injury (AKI) and promotes angiogenesis. We attempted to further ameliorate renal dysfunction by coembedding EPCs with renal mesenchymal stem cells (MSCs), while examining their paracrine influence on cytokine/chemokine release and proinflammatory macrophages. A live/dead assay determined whether EPC-MSC coculturing improved viability during lipopolysaccharide (LPS) treatment, and HA-hydrogel-embedded delivery of cells to LPS-induced AKI mice was assessed for effects on mean arterial pressure (MAP), renal blood flow (RBF), circulating cytokines/chemokines, serum creatinine, proteinuria, and angiogenesis (femoral ligation). Cytokine/chemokine release from embedded stem cells was examined, including effects on macrophage polarization and release of proinflammatory molecules. EPC-MSC coculturing improved stem cell viability during LPS exposure, an effect augmented by MSC hypoxic preconditioning. The delivery of coembedded EPCs with hypoxic preconditioned MSCs to AKI mice demonstrated additive improvement (compared with EPC delivery alone) in medullary RBF and proteinuria, with comparable effects on serum creatinine, MAP, and angiogenesis. Exposure of proinflammatory M1 macrophages to EPC-MSC conditioned medium changed their polarization to anti-inflammatory M2. Incubation of coembedded EPCs-MSCs with macrophages altered their release of cytokines/chemokines, including enhanced release of anti-inflammatory interleukin (IL)-4 and IL-10. EPC-MSC delivery to endotoxemic mice elevated the levels of circulating M2 macrophages and reduced the circulating cytokines/chemokines. In conclusion, coembedding EPCs-MSCs improved their resistance to stress, impelled macrophage polarization from M1 to M2 while altering their cytokine/chemokines release, reduced circulating cytokines/chemokines, and improved renal and vascular function when MSCs were hypoxically preconditioned. SIGNIFICANCE This report provides insight into a new therapeutic approach for treatment of sepsis and provides a new and improved strategy using hydrogels for the delivery of stem cells to treat sepsis and, potentially, other injuries and/or diseases. The delivery of two different stem cell lines (endothelial progenitor cells and mesenchymal stem cells; delivered alone and together) embedded in a protective bioengineered scaffolding (hydrogel) offers many therapeutic benefits for the treatment of sepsis. This study shows how hydrogel-delivered stem cells elicit their effects and how hydrogel embedding enhances the therapeutic efficacy of delivered stem cells. Hydrogel-delivered stem cells influence the components of the overactive immune system during sepsis and work to counterbalance the release of many proinflammatory and prodamage substances from immune cells, thereby improving the associated vascular and kidney damage.
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Affiliation(s)
- Joseph A Zullo
- Departments of Medicine, Pharmacology, and Physiology, Renal Research Institute, New York Medical College, Valhalla, New York, USA; Department of Nephrology and Rheumatology, University Medical Center Goettingen, Goettingen, Germany
| | - Ellen P Nadel
- Departments of Medicine, Pharmacology, and Physiology, Renal Research Institute, New York Medical College, Valhalla, New York, USA; Department of Nephrology and Rheumatology, University Medical Center Goettingen, Goettingen, Germany
| | - May M Rabadi
- Departments of Medicine, Pharmacology, and Physiology, Renal Research Institute, New York Medical College, Valhalla, New York, USA; Department of Nephrology and Rheumatology, University Medical Center Goettingen, Goettingen, Germany
| | - Matthew J Baskind
- Departments of Medicine, Pharmacology, and Physiology, Renal Research Institute, New York Medical College, Valhalla, New York, USA; Department of Nephrology and Rheumatology, University Medical Center Goettingen, Goettingen, Germany
| | - Maharshi A Rajdev
- Departments of Medicine, Pharmacology, and Physiology, Renal Research Institute, New York Medical College, Valhalla, New York, USA; Department of Nephrology and Rheumatology, University Medical Center Goettingen, Goettingen, Germany
| | - Cameron M Demaree
- Departments of Medicine, Pharmacology, and Physiology, Renal Research Institute, New York Medical College, Valhalla, New York, USA; Department of Nephrology and Rheumatology, University Medical Center Goettingen, Goettingen, Germany
| | - Radovan Vasko
- Departments of Medicine, Pharmacology, and Physiology, Renal Research Institute, New York Medical College, Valhalla, New York, USA; Department of Nephrology and Rheumatology, University Medical Center Goettingen, Goettingen, Germany
| | - Savneek S Chugh
- Departments of Medicine, Pharmacology, and Physiology, Renal Research Institute, New York Medical College, Valhalla, New York, USA; Department of Nephrology and Rheumatology, University Medical Center Goettingen, Goettingen, Germany
| | - Rajat Lamba
- Departments of Medicine, Pharmacology, and Physiology, Renal Research Institute, New York Medical College, Valhalla, New York, USA; Department of Nephrology and Rheumatology, University Medical Center Goettingen, Goettingen, Germany
| | - Michael S Goligorsky
- Departments of Medicine, Pharmacology, and Physiology, Renal Research Institute, New York Medical College, Valhalla, New York, USA; Department of Nephrology and Rheumatology, University Medical Center Goettingen, Goettingen, Germany
| | - Brian B Ratliff
- Departments of Medicine, Pharmacology, and Physiology, Renal Research Institute, New York Medical College, Valhalla, New York, USA; Department of Nephrology and Rheumatology, University Medical Center Goettingen, Goettingen, Germany
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Wang LM, Chang H, Zhang H, Ren KF, Li H, Hu M, Li BC, Martins MCL, Barbosa MA, Ji J. Dynamic stiffness of polyelectrolyte multilayer films based on disulfide bonds for in situ control of cell adhesion. J Mater Chem B 2015; 3:7546-7553. [DOI: 10.1039/c5tb01151e] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Dynamic stiffness of (poly-l-lysine/hyaluronan-SH) films was developed for in situ control of cell adhesion by using reversible disulfide linkages.
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Baranov P, Michaelson A, Kundu J, Carrier RL, Young M. Interphotoreceptor matrix-poly(ϵ-caprolactone) composite scaffolds for human photoreceptor differentiation. J Tissue Eng 2014; 5:2041731414554139. [PMID: 25383176 PMCID: PMC4221930 DOI: 10.1177/2041731414554139] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2014] [Accepted: 09/09/2014] [Indexed: 12/24/2022] Open
Abstract
Tissue engineering has been widely applied in different areas of regenerative medicine, including retinal regeneration. Typically, artificial biopolymers require additional surface modification (e.g. with arginine–glycine–aspartate-containing peptides or adsorption of protein, such as fibronectin), before cell seeding. Here, we describe an alternative approach for scaffold design: the manufacture of hybrid interphotoreceptor matrix-poly (ϵ-caprolactone) scaffolds, in which the insoluble extracellular matrix of the retina is incorporated into a biodegradable polymer well suited for transplantation. The incorporation of interphotoreceptor matrix did not change the topography of polycaprolactone film, although it led to a slight increase in hydrophilic properties (water contact angle measurements). This hybrid scaffold provided sufficient stimuli for human retinal progenitor cell adhesion and inhibited proliferation, leading to differentiation toward photoreceptor cells (expression of Crx, Nrl, rhodopsin, ROM1). This scaffold may be used for transplantation of retinal progenitor cells and their progeny to treat retinal degenerative disorders.
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Affiliation(s)
- Petr Baranov
- The Schepens Eye Research Institute, Massachusetts Eye and Ear, Harvard Medical School, Boston, MA, USA
| | - Andrew Michaelson
- Department of Chemical Engineering, Northeastern University, Boston, MA, USA
| | - Joydip Kundu
- Department of Chemical Engineering, Northeastern University, Boston, MA, USA
| | - Rebecca L Carrier
- Department of Chemical Engineering, Northeastern University, Boston, MA, USA
| | - Michael Young
- The Schepens Eye Research Institute, Massachusetts Eye and Ear, Harvard Medical School, Boston, MA, USA
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Saez-Martinez V, Olalde B, Martinez-Redondo D, Braceras I, Morin F, Valero J, Castro B. Degradable poly(ethylene glycol)-based hydrogels: Synthesis, physico-chemical properties and in vitro characterization. J BIOACT COMPAT POL 2014. [DOI: 10.1177/0883911514528597] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Designing degradable hydrogels is complicated by the structural and temporal complexities of the gel and evolving tissue. A major challenge is to create scaffolds with sufficient mechanical properties to restore initial function while simultaneously controlling temporal changes in the gel structure to facilitate tissue formation. Poly(ethylene glycol) was used in this work, to form biodegradable poly(ethylene glycol)-based hydrogels with hydrolyzable poly-l-lactide segments in the backbone. Non-degradable poly(ethylene glycol) was also introduced in the formulation to obtain control of the degradation profile that encompasses cell growth and new tissue formation. The dependence on polymer composition was observed by higher degradation profiles and decreased mechanical properties as the content of degradable segments was increased in the formulation. Based on in vitro tests, no toxicity of extracts or biomaterial in direct contact with human adipose tissue stem cells was observed, and the ultraviolet light treatment did not affect the proliferation capacity of the cells.
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Affiliation(s)
- Virginia Saez-Martinez
- TECNALIA, Health Division, CIBER of Bioengineering, Biomaterials and Nanomedicine, San Sebastian (Guipuzcoa), Spain
| | - Beatriz Olalde
- TECNALIA, Health Division, CIBER of Bioengineering, Biomaterials and Nanomedicine, San Sebastian (Guipuzcoa), Spain
| | | | - Iñigo Braceras
- TECNALIA, Health Division, CIBER of Bioengineering, Biomaterials and Nanomedicine, San Sebastian (Guipuzcoa), Spain
| | - Fabrice Morin
- TECNALIA, Health Division, CIBER of Bioengineering, Biomaterials and Nanomedicine, San Sebastian (Guipuzcoa), Spain
| | - Jesus Valero
- TECNALIA, Health Division, CIBER of Bioengineering, Biomaterials and Nanomedicine, San Sebastian (Guipuzcoa), Spain
| | - Begoña Castro
- HISTOCELL, Science and Technology Park of Bizkaia, Derio (Bizkaia), Spain
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46
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Mai M, Hempel U, Hacker MC, Dieter P. Effects of HyStem™-HP Hydrogel Elasticity on Osteogenic Differentiation of Human Mesenchymal Stromal Cells. Cell Mol Bioeng 2013. [DOI: 10.1007/s12195-013-0314-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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47
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Surface functionalization of styrenic block copolymer elastomeric biomaterials with hyaluronic acid via a "grafting to" strategy. Colloids Surf B Biointerfaces 2013; 112:146-54. [PMID: 23974002 DOI: 10.1016/j.colsurfb.2013.07.048] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2013] [Revised: 07/02/2013] [Accepted: 07/26/2013] [Indexed: 12/31/2022]
Abstract
As a biostable elastomer, the hydrophobicity of styrenic block copolymer (SBC) intensely limits its biomedical applications. In order to overcome such shortcoming, the SBC films were grafted with hyaluronic acid (HA) using a coupling agent. The surface chemistry of the modified films was examined by ATR-FTIR and XPS techniques, and the surface morphology was visually described by AFM. The biological performances of the HA-modified films were evaluated by a series of experiments, such as protein adsorption, platelet adhesion, and in vitro cytocompatibility. It was found that the HA-modified samples showed a low adhesiveness to fibroblast at the initial stage; however, it stimulated the growth of fibroblast. The L929 fibroblast growth presented a strong dependence on the molecular weight (MW) of HA. The samples modified with 17kDa HA exhibited the worst wettability and platelet adhesion, while providing the best results of supporting fibroblast proliferation.
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48
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Oppegard SC, Eddington DT. A microfabricated platform for establishing oxygen gradients in 3-D constructs. Biomed Microdevices 2013; 15:407-14. [PMID: 23344840 PMCID: PMC3651793 DOI: 10.1007/s10544-013-9737-0] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Oxygen gradients are increasingly implicated in a number of biological processes, including stem cell differentiation and cancer metastasis. Unfortunately, the current in vitro tools designed to mimic conditions found in vivo lack application flexibility, simplicity in operation, and precise spatial control that most researchers require for widespread dissemination. The novel microfluidic-based device presented here addresses all the above concerns, offering a simple platform for enhanced control over the oxygen microenvironment exposed to three-dimensional cell-seeded constructs. The device utilizes an oxygen diffusion membrane approach to establish a gradient across a construct sandwiched between two continually perfused microfluidic networks. The device is capable of forming steady-state gradients at both the conditions tested-0 % to 5 % O₂ and 0 % to 21 % O₂-but a wide variety of profiles within the construct are possible. Cell viability with two model cell lines was also tested, with no adverse effects relative to the control.
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Affiliation(s)
- Shawn C. Oppegard
- Department of Bioengineering, University of Illinois at Chicago, Chicago, IL
| | - David T. Eddington
- Department of Bioengineering, University of Illinois at Chicago, Chicago, IL
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49
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Reversible disulphide formation in polymer networks: A versatile functional group from synthesis to applications. Eur Polym J 2013. [DOI: 10.1016/j.eurpolymj.2013.03.001] [Citation(s) in RCA: 97] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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Ratliff BB, Goligorsky MS. Delivery of EPC embedded in HA-hydrogels for treatment of acute kidney injury. BIOMATTER 2013; 3:23284. [PMID: 23507925 PMCID: PMC3732320 DOI: 10.4161/biom.23284] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Adoptive transfer of stem cells has shown potential as an effective treatment for acute kidney injury (AKI). The current strategy for adoptive transfer of stem cells is by intravenous injection. However, this conventional method of stem cell delivery is riddled with problems causing reduced efficacy of the therapeutic potential of delivered stem cells. This review summarizes the recent advancements in an alternative method of stem cell delivery for treatment of AKI, embedding stem cells in hyaluronic acid (HA-) based hydrogels followed by their implantation. Furthermore, one stem cell type in particular, endothelial progenitor cells (EPC), have shown remarkable therapeutic benefits for treatment of AKI when delivered by HA-hydrogels. The review also summarizes the delivery of EPC by HA-hydrogels in the setting of AKI.
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Affiliation(s)
- Brian B Ratliff
- Departments of Medicine, Pharmacology and Physiology; New York Medical College; Valhalla, NY USA
| | - Michael S Goligorsky
- Departments of Medicine, Pharmacology and Physiology; New York Medical College; Valhalla, NY USA
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