401
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Dong Y, Liu Z, Qi F, Jin L, Zhang L, Zhu N. Polyethylene-Glycol-Ornamented Small Intestinal Submucosa Biosponge for Skin Tissue Engineering. ACS Biomater Sci Eng 2019; 5:2457-2465. [PMID: 33405753 DOI: 10.1021/acsbiomaterials.8b01592] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yabing Dong
- Department of Dermatology, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Zhifei Liu
- Department of Plastic Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100730, China
| | - Fazhi Qi
- Department of Plastic Surgery, Zhongshan Hospital, Shanghai 200032, China
| | - Liang Jin
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Druggability of Biopharmaceuticals, School of Life Science and Technology, China Pharmaceutical University, Nanjing, Jiangsu 210009, China
| | - Liang Zhang
- Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China
| | - Ningwen Zhu
- Department of Dermatology, Huashan Hospital, Fudan University, Shanghai 200040, China
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402
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Newsom JP, Payne KA, Krebs MD. Microgels: Modular, tunable constructs for tissue regeneration. Acta Biomater 2019; 88:32-41. [PMID: 30769137 PMCID: PMC6441611 DOI: 10.1016/j.actbio.2019.02.011] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Revised: 01/24/2019] [Accepted: 02/11/2019] [Indexed: 01/02/2023]
Abstract
Biopolymer microgels are emerging as a versatile tool for aiding in the regeneration of damaged tissues due to their biocompatible nature, tunable microporous structure, ability to encapsulate bioactive factors, and tailorable properties such as stiffness and composition. These properties of microgels, along with their injectability, have allowed for their utilization in a multitude of different tissue engineering applications. Controlled release of growth factors, antibodies, and other bioactive factors from microgels have demonstrated their capabilities as transporters for essential bioactive molecules necessary for guiding tissue reconstruction. Additionally, recent in vitro studies of cellular interaction and proliferation within microgel structures have laid the initial groundwork for regenerative tissue engineering using these materials. Microgels have even been crosslinked together in various ways or 3D printed to form three-dimensional scaffolds to support cell growth. In vivo studies of microgels have pioneered the clinical relevance of these novel and innovative materials for regenerative tissue engineering. This review will cover recent developments and research of microgels as they pertain to bioactive factor release, cellular interaction and proliferation in vitro, and tissue regeneration in vivo. STATEMENT OF SIGNIFICANCE: This review is focused on state-of-the-art microgel technology and innovations within the tissue engineering field, focusing on the use of microgels in bioactive factor delivery and as cell-interactive scaffolds, both in vitro and in vivo. Microgels are hydrogel microparticles that can be tuned based on the biopolymer from which they are derived, the crosslinking chemistry used, and the fabrication method. The emergence of microgels for tissue regeneration applications in recent years illuminates their versatility and applicability in clinical settings.
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Affiliation(s)
- Jake P Newsom
- Chemical & Biological Engineering, Colorado School of Mines, Golden, CO, United States
| | - Karin A Payne
- Orthopedics, University of Colorado Anschutz Medical Campus, Aurora, CO, United States
| | - Melissa D Krebs
- Chemical & Biological Engineering, Colorado School of Mines, Golden, CO, United States.
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403
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Badhe RV, Nipate SS. Low-intensity current (LIC) stimulation of subcutaneous adipose derived stem cells (ADSCs) - A missing link in the course of LIC based wound healing. Med Hypotheses 2019; 125:79-83. [PMID: 30902156 DOI: 10.1016/j.mehy.2019.02.039] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Revised: 02/13/2019] [Accepted: 02/15/2019] [Indexed: 01/20/2023]
Abstract
Millions of people die as a result of fatal injuries accounting for 9% of the total global annual deaths. Non fatal injuries generally result in variety of wounds. The normal wound healing process is slow and takes weeks to months, depending on the type of wound. In last two decades, electrotherapy called low-intensity currents (LIC) for the treatment became popular for faster wound healing, as well as in management of nonresponding and ulcerative wounds. It was reported that LIC mimics 'the current of injury' which is generated by body on wounding and helps in faster wound healing. Researchers have also studied the migration of localized cell and other bio-molecules under the influence of LIC helping the wound to heal faster. Literature review has also suggested that, electrical stimulation of isolated adipose tissue derived stem cells (ADSCs) releases growth factors and differentiates in to specialized cells like fibroblasts and keratinocytes in laboratory conditions. These research areas are well explored and emerged as independent state-of-the-arts therapies and technologies. Considering the fact, that adipose tissue (along with ADSCs) is present subcutaneously, a new hypothesis is proposed which states that 'low intensity current (LIC) stimulation of wound stimulates subcutaneous adipose tissue containing ADSCs which releases different growth factors and also differentiates into certain cells like fibroblasts, neurons and keratinocytes. These cells easily migrate to wound site due to lipolysis and loosening of fat tissue, resulting in faster wound healing'. Thus this hypothesis provides a missing link between two state of the art technologies; first one is 'LIC based electrotherapy' and second one is 'in-vitro LIC stimulation of ADCSs' where role and significance of in-situ ADCSs were never studied.
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Affiliation(s)
- Ravindra V Badhe
- Dr. D.Y. Patil Institute of Pharmaceutical Sciences and Research, Pimpri, Pune, Maharashtra, India.
| | - Sonali S Nipate
- PE Society's Modern College of Pharmacy, Nigdi, Pune, Maharashtra, India
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404
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Wechsler ME, Stephenson RE, Murphy AC, Oldenkamp HF, Singh A, Peppas NA. Engineered microscale hydrogels for drug delivery, cell therapy, and sequencing. Biomed Microdevices 2019; 21:31. [PMID: 30904963 DOI: 10.1007/s10544-019-0358-0] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Engineered microscale hydrogels have emerged as promising therapeutic approaches for the treatment of various diseases. These microgels find wide application in the biomedical field because of the ease of injectability, controlled release of therapeutics, flexible means of synthesis, associated tunability, and can be engineered as stimuli-responsive. While bulk hydrogels of several length-scale dimensions have been used for over two decades in drug delivery applications, their use as microscale carriers of drug and cell-based therapies is relatively new. Herein, we critically summarize the fundamentals of hydrogels based on their equilibrium and dynamics of their molecular structure, as well as solute diffusion as it relates to drug delivery. In addition, examples of common microgel synthesis techniques are provided. The ability to tune microscale hydrogels to obtain controlled release of therapeutics is discussed, along with microgel considerations for cell encapsulation as it relates to the development of cell-based therapies. We conclude with an outlook on the use of microgels for cell sequencing, and the convergence of the use of microscale hydrogels for drug delivery, cell therapy, and cell sequencing based systems.
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Affiliation(s)
- Marissa E Wechsler
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, TX, USA
- Institute for Biomaterials, Drug Delivery, and Regenerative Medicine, The University of Texas at Austin, Austin, TX, USA
| | - Regan E Stephenson
- Meinig School of Biomedical Engineering, Cornell University, Ithaca, NY, USA
| | - Andrew C Murphy
- Institute for Biomaterials, Drug Delivery, and Regenerative Medicine, The University of Texas at Austin, Austin, TX, USA
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, TX, USA
| | - Heidi F Oldenkamp
- Institute for Biomaterials, Drug Delivery, and Regenerative Medicine, The University of Texas at Austin, Austin, TX, USA
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, TX, USA
| | - Ankur Singh
- Meinig School of Biomedical Engineering, Cornell University, Ithaca, NY, USA
- Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY, USA
- Englander Institute for Precision Medicine, Weill Cornell Medical College, New York, NY, USA
| | - Nicholas A Peppas
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, TX, USA.
- Institute for Biomaterials, Drug Delivery, and Regenerative Medicine, The University of Texas at Austin, Austin, TX, USA.
- McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, TX, USA.
- Division of Molecular Pharmaceutics and Drug Delivery, College of Pharmacy, The University of Texas at Austin, Austin, TX, USA.
- Department of Surgery and Perioperative Care, and Department of Pediatrics, Dell Medical School, The University of Texas at Austin, Austin, TX, USA.
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405
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Microparticles in Contact with Cells: From Carriers to Multifunctional Tissue Modulators. Trends Biotechnol 2019; 37:1011-1028. [PMID: 30902347 DOI: 10.1016/j.tibtech.2019.02.008] [Citation(s) in RCA: 64] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Revised: 02/15/2019] [Accepted: 02/19/2019] [Indexed: 12/13/2022]
Abstract
For several decades microparticles have been exclusively and extensively explored as spherical drug delivery vehicles and large-scale cell expansion carriers. More recently, microparticulate structures gained interest in broader bioengineering fields, integrating myriad strategies that include bottom-up tissue engineering, 3D bioprinting, and the development of tissue/disease models. The concept of bulk spherical micrometric particles as adequate supports for cell cultivation has been challenged, and systems with finely tuned geometric designs and (bio)chemical/physical features are current key players in impacting technologies. Herein, we critically review the state of the art and future trends of biomaterial microparticles in contact with cells and tissues, excluding internalization studies, and with emphasis on innovative particle design and applications.
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406
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Dumont CM, Carlson MA, Munsell MK, Ciciriello AJ, Strnadova K, Park J, Cummings BJ, Anderson AJ, Shea LD. Aligned hydrogel tubes guide regeneration following spinal cord injury. Acta Biomater 2019; 86:312-322. [PMID: 30610918 DOI: 10.1016/j.actbio.2018.12.052] [Citation(s) in RCA: 71] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Revised: 12/22/2018] [Accepted: 12/31/2018] [Indexed: 12/21/2022]
Abstract
Directing the organization of cells into a tissue with defined architectures is one use of biomaterials for regenerative medicine. To this end, hydrogels are widely investigated as they have mechanical properties similar to native soft tissues and can be formed in situ to conform to a defect. Herein, we describe the development of porous hydrogel tubes fabricated through a two-step polymerization process with an intermediate microsphere phase that provides macroscale porosity (66.5%) for cell infiltration. These tubes were investigated in a spinal cord injury model, with the tubes assembled to conform to the injury and to provide an orientation that guides axons through the injury. Implanted tubes had good apposition and were integrated with the host tissue due to cell infiltration, with a transient increase in immune cell infiltration at 1 week that resolved by 2 weeks post injury compared to a gelfoam control. The glial scar was significantly reduced relative to control, which enabled robust axon growth along the inner and outer surface of the tubes. Axon density within the hydrogel tubes (1744 axons/mm2) was significantly increased more than 3-fold compared to the control (456 axons/mm2), with approximately 30% of axons within the tube myelinated. Furthermore, implantation of hydrogel tubes enhanced functional recovery relative to control. This modular assembly of porous tubes to fill a defect and directionally orient tissue growth could be extended beyond spinal cord injury to other tissues, such as vascular or musculoskeletal tissue. STATEMENT OF SIGNIFICANCE: Tissue engineering approaches that mimic the native architecture of healthy tissue are needed following injury. Traditionally, pre-molded scaffolds have been implemented but require a priori knowledge of wound geometries. Conversely, hydrogels can conform to any injury, but do not guide bi-directional regeneration. In this work, we investigate the feasibility of a system of modular hydrogel tubes to promote bi-directional regeneration after spinal cord injury. This system allows for tubes to be cut to size during surgery and implanted one-by-one to fill any injury, while providing bi-directional guidance. Moreover, this system of tubes can be broadly applied to tissue engineering approaches that require a modular guidance system, such as repair to vascular or musculoskeletal tissues.
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407
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Fan Z, Deng J, Li PY, Chery DR, Su Y, Zhu P, Kambayashi T, Blankenhorn EP, Han L, Cheng H. A new class of biological materials: Cell membrane-derived hydrogel scaffolds. Biomaterials 2019; 197:244-254. [PMID: 30669015 PMCID: PMC6369705 DOI: 10.1016/j.biomaterials.2019.01.020] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Revised: 01/08/2019] [Accepted: 01/09/2019] [Indexed: 11/18/2022]
Abstract
Biological materials are superior to synthetic biomaterials in biocompatibility and active interactions with cells. Here, a new class of biological materials, cell membrane-derived hydrogel scaffolds are reported for harnessing these advantages. To form macroporous scaffolds, vesicles derived from red blood cell membranes (RBCMs) are chemically crosslinked via cryogelation. The RBCM scaffolds with a pore size of around 70 μm are soft and injectable. Highly biocompatible scaffolds are typically made of superhydrophilic polymers and lack the ability to encapsulate and release hydrophobic drugs in a controlled manner. However, hydrophobic molecules can be efficiently encapsulated inside RBCM scaffolds and be sustainedly released. RBCM scaffolds show low neutrophil infiltration after subcutaneous injection in mice, and a significantly higher number of infiltrated macrophages than methacrylate alginate (MA-alginate) scaffolds. According to gene expression and surface markers, these macrophages have an M2-like phenotype, which is anti-inflammatory and immune suppressive. There are also higher percentages of macrophages presenting immunosuppressive PD-L1 in RBCM-scaffolds than in MA-alginate scaffolds. Interestingly, the concentrations of anti-inflammatory cytokine, IL-10 in both types of scaffolds are higher than those in normal organ tissues. This study sheds light on cell membrane-derived hydrogels, which can actively modulate cells in unique ways unavailable to existing hydrogel scaffolds.
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Affiliation(s)
- Zhiyuan Fan
- Department of Materials Science and Engineering, Drexel University, Philadelphia, PA 19104, USA
| | - Junjie Deng
- Department of Materials Science and Engineering, Drexel University, Philadelphia, PA 19104, USA; School of Biomedical Engineering, School of Ophthalmology and Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang 325011, China; Wenzhou Institute of Biomaterials and Engineering, Chinese Academy of Sciences, Wenzhou, Zhejiang 325000, China
| | - Peter Y Li
- Department of Materials Science and Engineering, Drexel University, Philadelphia, PA 19104, USA
| | - Daphney R Chery
- School of Biomedical Engineering, Science and Health Systems, Drexel University, Philadelphia, PA 19104, USA
| | - Yunfei Su
- School of Biomedical Engineering, School of Ophthalmology and Optometry and Eye Hospital, Wenzhou Medical University, Wenzhou, Zhejiang 325011, China; Wenzhou Institute of Biomaterials and Engineering, Chinese Academy of Sciences, Wenzhou, Zhejiang 325000, China
| | - Pu Zhu
- Department of Materials Science and Engineering, Drexel University, Philadelphia, PA 19104, USA
| | - Taku Kambayashi
- Department of Pathology and Laboratory Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA
| | - Elizabeth P Blankenhorn
- Department of Microbiology and Immunology, Drexel University College of Medicine, Philadelphia, PA 19129, USA
| | - Lin Han
- School of Biomedical Engineering, Science and Health Systems, Drexel University, Philadelphia, PA 19104, USA
| | - Hao Cheng
- Department of Materials Science and Engineering, Drexel University, Philadelphia, PA 19104, USA; School of Biomedical Engineering, Science and Health Systems, Drexel University, Philadelphia, PA 19104, USA.
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408
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Xin S, Chimene D, Garza JE, Gaharwar AK, Alge DL. Clickable PEG hydrogel microspheres as building blocks for 3D bioprinting. Biomater Sci 2019; 7:1179-1187. [PMID: 30656307 PMCID: PMC9179007 DOI: 10.1039/c8bm01286e] [Citation(s) in RCA: 137] [Impact Index Per Article: 27.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/29/2023]
Abstract
Three-dimensional (3D) bioprinting is important in the development of complex tissue structures for tissue engineering and regenerative medicine. However, the materials used for bioprinting, referred to as bioinks, must have a balance between a high viscosity for rapid solidification after extrusion and low shear force for cytocompatibility, which is difficult to achieve. Here, a novel bioink consisting of poly(ethylene glycol) (PEG) microgels prepared via off-stoichiometry thiol-ene click chemistry is introduced. Importantly, the microgel bioink is easily extruded, exhibits excellent stability after printing due to interparticle adhesion forces, and can be photochemically annealed with a second thiol-ene click reaction to confer long-term stability to printed constructs. The modularity of the bioink is also an advantage, as the PEG microgels have highly tunable physicochemical properties. The low force required for extrusion and cytocompatibility of the thiol-ene annealing reaction also permit cell incorporation during printing with high viability, and cells are able to spread and proliferate in the interstitial spaces between the microgels after the constructs have been annealed. Overall, these results indicate that our microgel bioink is a promising and versatile platform that could be leveraged for bioprinting and regenerative manufacturing.
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Affiliation(s)
- Shangjing Xin
- Department of Biomedical Engineering, Texas A&M University, College Station, TX 77843, USA.
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409
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Mu M, Li X, Tong A, Guo G. Multi-functional chitosan-based smart hydrogels mediated biomedical application. Expert Opin Drug Deliv 2019; 16:239-250. [PMID: 30753086 DOI: 10.1080/17425247.2019.1580691] [Citation(s) in RCA: 58] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Min Mu
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, R. P. China
- Department of Neurosurgery, West China Hospital, Sichuan University, Chengdu, R. P. China
- Collaborative Innovation Center for Biotherapy, Chengdu, R. P. China
| | - Xiaoling Li
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, R. P. China
- Department of Neurosurgery, West China Hospital, Sichuan University, Chengdu, R. P. China
- Collaborative Innovation Center for Biotherapy, Chengdu, R. P. China
| | - Aiping Tong
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, R. P. China
- Department of Neurosurgery, West China Hospital, Sichuan University, Chengdu, R. P. China
- Collaborative Innovation Center for Biotherapy, Chengdu, R. P. China
| | - Gang Guo
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, R. P. China
- Department of Neurosurgery, West China Hospital, Sichuan University, Chengdu, R. P. China
- Collaborative Innovation Center for Biotherapy, Chengdu, R. P. China
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410
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Truong NF, Lesher-Pérez SC, Kurt E, Segura T. Pathways Governing Polyethylenimine Polyplex Transfection in Microporous Annealed Particle Scaffolds. Bioconjug Chem 2019; 30:476-486. [PMID: 30513197 PMCID: PMC7290906 DOI: 10.1021/acs.bioconjchem.8b00696] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Gene delivery using injectable hydrogels can serve as a potential method for regulated tissue regeneration in wound healing. Our microporous annealed particle (MAP) hydrogel has been shown to promote cellular infiltration in both skin and brain wounds, while reducing inflammation. Although the scaffold itself can promote healing, it is likely that other signals will be required to promote healing of hard-to-treat wounds. Gene delivery is one approach to introduce desired bioactive signals. In this study, we investigated how the properties of MAP hydrogels influence non-viral gene delivery of polyethylenimine-condensed plasmid to cells seeded within the MAP gel. From past studies, we found that gene transfer to cells seeded in tissue culture plastic differed from gene transfer to cells seeded inside hydrogel scaffolds. Since MAP scaffolds are generated from hydrogel microparticles that are approximately 100 μm in diameter, they display local characteristics that can be viewed as two-dimensional or three-dimensional to cells. Thus, we sought to study if gene transfer inside MAP scaffolds differed from gene transfer to cells seeded in tissue culture plastic. We sought to understand the roles of the endocytosis pathway, actin and microtubule dynamics, RhoGTPases, and YAP/TAZ on transfection of human fibroblasts.
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Affiliation(s)
- Norman F Truong
- Department of Chemical and Biomolecular Engineering , University of California , Los Angeles , California 90095 , United States
| | - Sasha Cai Lesher-Pérez
- Department of Chemical and Biomolecular Engineering , University of California , Los Angeles , California 90095 , United States
| | - Evan Kurt
- Department of Biomedical Engineering , Duke University , Durham , North Carolina 27708 , United States
| | - Tatiana Segura
- Department of Chemical and Biomolecular Engineering , University of California , Los Angeles , California 90095 , United States
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411
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Zhao N, Coyne J, Xu M, Zhang X, Suzuki A, Shi P, Lai J, Fong GH, Xiong N, Wang Y. Assembly of Bifunctional Aptamer-Fibrinogen Macromer for VEGF Delivery and Skin Wound Healing. CHEMISTRY OF MATERIALS : A PUBLICATION OF THE AMERICAN CHEMICAL SOCIETY 2019; 31:1006-1015. [PMID: 31558852 PMCID: PMC6761992 DOI: 10.1021/acs.chemmater.8b04486] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Macromolecular assembly has been studied for various applications. However, while macromolecules can recognize one another for assembly, their assembled structures usually lack the function of specific molecular recognition. We hypothesized that bifunctional aptamer-protein macromers would possess dual functions of molecular assembly and recognition. The data show that hybrid aptamer-fibrinogen macromers can assemble to form hydrogels. Moreover, the assembled hydrogels can recognize vascular endothelial growth factor (VEGF) for sustained release. When the VEGF-loaded hydrogels are implanted in vivo, they can promote angiogenesis and skin wound healing. Thus, this work has successfully demonstrated a promising macromolecular system for broad applications such as drug delivery and regenerative medicine.
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Affiliation(s)
- Nan Zhao
- Department of Biomedical Engineering, The Pennsylvania State University, University Park, PA 16802, USA
| | - James Coyne
- Department of Biomedical Engineering, The Pennsylvania State University, University Park, PA 16802, USA
| | - Ming Xu
- Department of Veterinary and Biomedical Sciences, The Pennsylvania State University, University Park, PA 16802, USA
| | - Xiaolong Zhang
- Department of Biomedical Engineering, The Pennsylvania State University, University Park, PA 16802, USA
| | - Akiho Suzuki
- Department of Biomedical Engineering, The Pennsylvania State University, University Park, PA 16802, USA
| | - Peng Shi
- Department of Biomedical Engineering, The Pennsylvania State University, University Park, PA 16802, USA
| | - Jinping Lai
- Department of Biomedical Engineering, The Pennsylvania State University, University Park, PA 16802, USA
| | - Guo-Hua Fong
- Center for Vascular Biology, University of Connecticut Health Center, Farmington, CT 06030, USA
| | - Na Xiong
- Department of Veterinary and Biomedical Sciences, The Pennsylvania State University, University Park, PA 16802, USA
| | - Yong Wang
- Department of Biomedical Engineering, The Pennsylvania State University, University Park, PA 16802, USA
- Correspondence can be addressed to Dr. Yong Wang (; Phone: 814-865-6867)
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412
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Kumar Meena L, Rather H, Kedaria D, Vasita R. Polymeric microgels for bone tissue engineering applications – a review. INT J POLYM MATER PO 2019. [DOI: 10.1080/00914037.2019.1570512] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Lalit Kumar Meena
- Biomaterials & Biomimetics laboratory, School of Life Sciences, Central University of Gujarat, Gandhinagar, India
| | - Hilal Rather
- Biomaterials & Biomimetics laboratory, School of Life Sciences, Central University of Gujarat, Gandhinagar, India
| | - Dhaval Kedaria
- Biomaterials & Biomimetics laboratory, School of Life Sciences, Central University of Gujarat, Gandhinagar, India
| | - Rajesh Vasita
- Biomaterials & Biomimetics laboratory, School of Life Sciences, Central University of Gujarat, Gandhinagar, India
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413
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Sheikhi A, de Rutte J, Haghniaz R, Akouissi O, Sohrabi A, Di Carlo D, Khademhosseini A. Microfluidic-enabled bottom-up hydrogels from annealable naturally-derived protein microbeads. Biomaterials 2019; 192:560-568. [PMID: 30530245 PMCID: PMC6400213 DOI: 10.1016/j.biomaterials.2018.10.040] [Citation(s) in RCA: 98] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Revised: 10/27/2018] [Accepted: 10/28/2018] [Indexed: 01/15/2023]
Abstract
Naturally-derived proteins, such as collagen, elastin, fibroin, and gelatin (denatured collagen) hold a remarkable promise for tissue engineering and regenerative medicine. Gelatin methacryloyl (GelMA), synthesized from the methacryloyl modification of gelatin, mimicking the structure of extracellular matrix, has widely been used as a universal multi-responsive scaffold for a broad spectrum of applications, spanning from cell therapy to bioprinting and organoid development. Despite the widespread applications of GelMA, coupled stiffness and porosity has inhibited its applications in 3D cellular engineering wherein a stiff scaffold with large pores is demanded (e.g., at concentrations >10 wt%). Taking advantage of the orthogonal thermo-chemical responsivity of GelMA, we have developed microfluidic-assisted annealable GelMA beads, that are first stabilized by temperature-mediated physical crosslinking, flowed to form a scaffold structure, and then chemically annealed using light to fabricate novel bead-based 3D GelMA scaffolds with high mechanical resilience. We show how beaded GelMA (B-GelMA) provides a self-standing microporous environment with an orthogonal void fraction and stiffness, promoting cell adhesion, proliferation, and rapid 3D seeding at a high polymer concentration (∼20 wt%) that would otherwise be impossible for bulk GelMA. B-GelMA, decorated with methacryloyl and arginylglycylaspartic acid (RGD) peptide motifs, does not require additional functionalization for annealing and cell adhesion, providing a versatile biorthogonal platform with orthogonal stiffness and porosity for a myriad of biomedical applications. This technology provides a universal method to convert polymeric materials with orthogonal physico-chemical responsivity to modular platforms, opening a new horizon for converting bulk hydrogels to beaded hydrogels (B-hydrogels) with decoupled porosity and stiffness.
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Affiliation(s)
- Amir Sheikhi
- Department of Bioengineering, University of California - Los Angeles, 410 Westwood Plaza, Los Angeles, CA 90095, USA; Center for Minimally Invasive Therapeutics (C-MIT), University of California - Los Angeles, 570 Westwood Plaza, Los Angeles, CA 90095, USA; California NanoSystems Institute (CNSI), University of California - Los Angeles, 570 Westwood Plaza, Los Angeles, CA 90095, USA
| | - Joseph de Rutte
- Department of Bioengineering, University of California - Los Angeles, 410 Westwood Plaza, Los Angeles, CA 90095, USA
| | - Reihaneh Haghniaz
- Department of Bioengineering, University of California - Los Angeles, 410 Westwood Plaza, Los Angeles, CA 90095, USA; Center for Minimally Invasive Therapeutics (C-MIT), University of California - Los Angeles, 570 Westwood Plaza, Los Angeles, CA 90095, USA; California NanoSystems Institute (CNSI), University of California - Los Angeles, 570 Westwood Plaza, Los Angeles, CA 90095, USA
| | - Outman Akouissi
- Department of Bioengineering, University of California - Los Angeles, 410 Westwood Plaza, Los Angeles, CA 90095, USA; Center for Minimally Invasive Therapeutics (C-MIT), University of California - Los Angeles, 570 Westwood Plaza, Los Angeles, CA 90095, USA; California NanoSystems Institute (CNSI), University of California - Los Angeles, 570 Westwood Plaza, Los Angeles, CA 90095, USA
| | - Alireza Sohrabi
- Department of Bioengineering, University of California - Los Angeles, 410 Westwood Plaza, Los Angeles, CA 90095, USA
| | - Dino Di Carlo
- Department of Bioengineering, University of California - Los Angeles, 410 Westwood Plaza, Los Angeles, CA 90095, USA; California NanoSystems Institute (CNSI), University of California - Los Angeles, 570 Westwood Plaza, Los Angeles, CA 90095, USA; Jonsson Comprehensive Cancer Centre, University of California - Los Angeles, 10833 Le Conte Ave, Los Angeles, CA 90024, USA.
| | - Ali Khademhosseini
- Department of Bioengineering, University of California - Los Angeles, 410 Westwood Plaza, Los Angeles, CA 90095, USA; Center for Minimally Invasive Therapeutics (C-MIT), University of California - Los Angeles, 570 Westwood Plaza, Los Angeles, CA 90095, USA; California NanoSystems Institute (CNSI), University of California - Los Angeles, 570 Westwood Plaza, Los Angeles, CA 90095, USA; Jonsson Comprehensive Cancer Centre, University of California - Los Angeles, 10833 Le Conte Ave, Los Angeles, CA 90024, USA; Department of Radiological Sciences, David Geffen School of Medicine, University of California - Los Angeles, 10833 Le Conte Ave, Los Angeles, CA 90095, USA; Department of Chemical and Biomolecular Engineering, University of California - Los Angeles, 5531 Boelter Hall, Los Angeles, CA 90095, USA; Department of Bioindustrial Technologies, College of Animal Bioscience and Technology, Konkuk University, Seoul, 143-701, Republic of Korea.
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414
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Liu C, Zheng W, Xie R, Liu Y, Liang Z, Luo G, Ding M, Liang Q. Microfluidic fabrication of water-in-water droplets encapsulated in hydrogel microfibers. CHINESE CHEM LETT 2019. [DOI: 10.1016/j.cclet.2018.09.010] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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415
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Sahu P, Kashaw SK, Sau S, Kushwah V, Jain S, Agrawal RK, Iyer AK. pH triggered and charge attracted nanogel for simultaneous evaluation of penetration and toxicity against skin cancer: In-vitro and ex-vivo study. Int J Biol Macromol 2019; 128:740-751. [PMID: 30699336 DOI: 10.1016/j.ijbiomac.2019.01.147] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Revised: 01/10/2019] [Accepted: 01/25/2019] [Indexed: 12/30/2022]
Abstract
The current research is focused to develop and investigate the toxicity and penetration potential of biocompatible chitosan nanogel encapsulating capecitabine by ionic interaction mechanism exhibiting pH triggered transdermal targeting. The nanogel (CPNL) was synthesized by ion gelation mechanism using Pluronic F 127 and surface decoration by Transcutol as non-ionic penetration enhancer. The CPNL possesses fine morphology and nano size range when evaluated by TEM, SEM and DLS analysis with cationic charge and slightly acidic pH assayed by zeta potential and pH analysis. It showed pH responsive drug release characteristics mimicking the skin cancer micro-environment. The MTT assay and apoptotic index of CPNL on HaCaT cell line elaborated optimal cell toxicity and retention on 24h of exposure. The ex-vivo skin penetration analysis exhibited noteworthy diffusion and penetration caliber through concentration depth profile, steady state flux and fluorescent skin imaging on porcine tissue. Overall outcomes suggested CPNL as a potent alternative biocompatible, transdermal nanotherapy against skin cancer displaying significant penetration caliber with enhance toxicity on cancerous cell.
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Affiliation(s)
- Prashant Sahu
- Department of Pharmaceutical Sciences, Dr. Harisingh Gour Central University, Sagar, MP, India
| | - Sushil K Kashaw
- Department of Pharmaceutical Sciences, Dr. Harisingh Gour Central University, Sagar, MP, India; Use-inspired Biomaterials & Integrated Nano Delivery (U-BiND) Systems Laboratory, Department of Pharmaceutical Sciences, Wayne State University, Detroit, MI, USA.
| | - Samaresh Sau
- Use-inspired Biomaterials & Integrated Nano Delivery (U-BiND) Systems Laboratory, Department of Pharmaceutical Sciences, Wayne State University, Detroit, MI, USA
| | - Varun Kushwah
- Centre for Pharmaceutical Nanotechnology, Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Sector 67, SAS Nagar (Mohali), Punjab, India
| | - Sanyog Jain
- Centre for Pharmaceutical Nanotechnology, Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Sector 67, SAS Nagar (Mohali), Punjab, India
| | - Ram K Agrawal
- Department of Pharmaceutical Sciences, Dr. Harisingh Gour Central University, Sagar, MP, India
| | - Arun K Iyer
- Use-inspired Biomaterials & Integrated Nano Delivery (U-BiND) Systems Laboratory, Department of Pharmaceutical Sciences, Wayne State University, Detroit, MI, USA; Molecular Therapeutics Program, Karmanos Cancer Institute, Detroit, MI, USA
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416
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Cai Y, Wu F, Yu Y, Liu Y, Shao C, Gu H, Li M, Zhao Y. Porous scaffolds from droplet microfluidics for prevention of intrauterine adhesion. Acta Biomater 2019; 84:222-230. [PMID: 30476581 DOI: 10.1016/j.actbio.2018.11.016] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Revised: 10/14/2018] [Accepted: 11/10/2018] [Indexed: 01/04/2023]
Abstract
Severe intrauterine adhesions (IUAs) have a great negative impact on women's psychological and reproductive health. It remains a significant challenge to prevent postoperative IUAs because of the complications of various clinical preventive measures and incompatibility of uterine cavity morphology. Herein, we present a new drug-loadedporous scaffold based on a microfluidic droplet template, which combines the characteristics of the artificial biocompatible material GelMA and the natural polysaccharide material Na-alginate. By changing the containers that collect the microfluidic droplets, the porous scaffold conforming to the shape of the uterine cavity could be obtained. The porous structure, mechanical property, and flexibility impart the scaffold with compressibility and send it to the uterus through the vagina. In addition, the external-internal connected open structures could load and control the release of drugs to repair the damaged region continuously in vivo. To verify the antiadhesion and repair of drug-loaded porous scaffolds, we tested the system in the rat model of IUAs, and it was demonstrated that the system had the ability to improve neovascularization, cellularize the damaged tissue, and repair the endometrium. These features provide the drug-loaded porous scaffolds with new options for the improvement of postoperative IUAs. STATEMENT OF SIGNIFICANCE: Intrauterine adhesions are caused by various causes of damage to the endometrial basal layer, thus leading to part or entire adhesions in the cervical or uterine cavity. Clinically, various preventive measures reach the barrier effect through the physical barrier, which are difficult to further promote the repair of the damaged endometrium, and most of them have apparent side effects. This study aims to prepare compressible and biodegradable three-dimensional porous drug-loading biological scaffolds. GelMA and Na-alginate have desirable biocompatibility. The interconnect porous scaffolds, which were prepared through the combination of biomaterials and single emulsion microfluidics, not only have compressibility but also provide space for drug delivery and release. This system can further promote the repair of the endometrium while preventing adhesion.
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417
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Yu H, Chen X, Cai J, Ye D, Wu Y, Liu P. Dual controlled release nanomicelle-in-nanofiber system for long-term antibacterial medical dressings. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2019; 30:64-76. [PMID: 30449259 DOI: 10.1080/09205063.2018.1549771] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Long-term antibacterial medical dressings can prevent infection as skin wounds heal. In this study, we used the hydrophobic antibacterial drug amoxicillin as a model to prepare drug-loaded nanomicelles using a film dispersion-hydration method, and drug-loaded nanomicelles were coaxially electrospun into nanofiber to create a novel nanomicelle-in-nanofiber (NM-in-NF) drug delivery system. Scanning electron microscopy and transmission electron microscopy were used to characterize the morphology of nanomicelles and nanofibers. Thermal property of as-prepared samples was tested using differential scanning calorimetry. The drug release behavior, cytotoxicity, and antibacterial properties of NM-in-NFs were examined in vitro to evaluate the system's potential to be used in the treatment of skin wounds. Experimental results indicated that the novel NM-in-NF system had dual controlled release effect, which greatly reduced burst release and prolonged effective drug duration. Moreover, NM-in-NFs was also found to be safe and non-toxic, with a broad-spectrum antibacterial activity. It thus could potentially be used in long-term antibacterial medical dressings to treat skin wounds.
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Affiliation(s)
- Hui Yu
- a The Engineering Technology Research Center for Functional Textiles in Higher Education of Guangdong Province, School of Textile Materials and Engineering , Wuyi University , Jiangmen , Guangdong , China
| | - Xiaojing Chen
- b State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, School of Medicine , Shanghai Jiao Tong University , Shanghai , China.,c Central Laboratory, Renji Hospital, School of Medicine , Shanghai Jiao Tong University , Shanghai , China
| | - Jie Cai
- a The Engineering Technology Research Center for Functional Textiles in Higher Education of Guangdong Province, School of Textile Materials and Engineering , Wuyi University , Jiangmen , Guangdong , China
| | - Dongdong Ye
- a The Engineering Technology Research Center for Functional Textiles in Higher Education of Guangdong Province, School of Textile Materials and Engineering , Wuyi University , Jiangmen , Guangdong , China
| | - Yuxiao Wu
- a The Engineering Technology Research Center for Functional Textiles in Higher Education of Guangdong Province, School of Textile Materials and Engineering , Wuyi University , Jiangmen , Guangdong , China
| | - Peifeng Liu
- b State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, School of Medicine , Shanghai Jiao Tong University , Shanghai , China.,c Central Laboratory, Renji Hospital, School of Medicine , Shanghai Jiao Tong University , Shanghai , China
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418
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Sun W, Lee J, Zhang S, Benyshek C, Dokmeci MR, Khademhosseini A. Engineering Precision Medicine. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2019; 6:1801039. [PMID: 30643715 PMCID: PMC6325626 DOI: 10.1002/advs.201801039] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Revised: 09/10/2018] [Indexed: 05/18/2023]
Abstract
Advances in genomic sequencing and bioinformatics have led to the prospect of precision medicine where therapeutics can be advised by the genetic background of individuals. For example, mapping cancer genomics has revealed numerous genes that affect the therapeutic outcome of a drug. Through materials and cell engineering, many opportunities exist for engineers to contribute to precision medicine, such as engineering biosensors for diagnosis and health status monitoring, developing smart formulations for the controlled release of drugs, programming immune cells for targeted cancer therapy, differentiating pluripotent stem cells into desired lineages, fabricating bioscaffolds that support cell growth, or constructing "organs-on-chips" that can screen the effects of drugs. Collective engineering efforts will help transform precision medicine into a more personalized and effective healthcare approach. As continuous progress is made in engineering techniques, more tools will be available to fully realize precision medicine's potential.
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Affiliation(s)
- Wujin Sun
- Department of BioengineeringUniversity of California–Los AngelesLos AngelesCA90095USA
- Center for Minimally Invasive Therapeutics (C‐MIT)California NanoSystems InstituteUniversity of California–Los AngelesLos AngelesCA90095USA
| | - Junmin Lee
- Department of BioengineeringUniversity of California–Los AngelesLos AngelesCA90095USA
- Center for Minimally Invasive Therapeutics (C‐MIT)California NanoSystems InstituteUniversity of California–Los AngelesLos AngelesCA90095USA
| | - Shiming Zhang
- Department of BioengineeringUniversity of California–Los AngelesLos AngelesCA90095USA
- Center for Minimally Invasive Therapeutics (C‐MIT)California NanoSystems InstituteUniversity of California–Los AngelesLos AngelesCA90095USA
| | - Cole Benyshek
- Department of BioengineeringUniversity of California–Los AngelesLos AngelesCA90095USA
- Center for Minimally Invasive Therapeutics (C‐MIT)California NanoSystems InstituteUniversity of California–Los AngelesLos AngelesCA90095USA
| | - Mehmet R. Dokmeci
- Department of BioengineeringUniversity of California–Los AngelesLos AngelesCA90095USA
- Center for Minimally Invasive Therapeutics (C‐MIT)California NanoSystems InstituteUniversity of California–Los AngelesLos AngelesCA90095USA
- Department of RadiologyUniversity of California–Los AngelesLos AngelesCA90095USA
| | - Ali Khademhosseini
- Department of BioengineeringUniversity of California–Los AngelesLos AngelesCA90095USA
- Center for Minimally Invasive Therapeutics (C‐MIT)California NanoSystems InstituteUniversity of California–Los AngelesLos AngelesCA90095USA
- Department of RadiologyUniversity of California–Los AngelesLos AngelesCA90095USA
- Jonsson Comprehensive Cancer CenterUniversity of California–Los Angeles10833 Le Conte AveLos AngelesCA90024USA
- Department of Chemical and Biomolecular EngineeringUniversity of California–Los AngelesLos AngelesCA90095USA
- Center of NanotechnologyDepartment of PhysicsKing Abdulaziz UniversityJeddah21569Saudi Arabia
- Department of Bioindustrial TechnologiesCollege of Animal Bioscience and TechnologyKonkuk UniversitySeoul05029Republic of Korea
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419
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Highley CB, Song KH, Daly AC, Burdick JA. Jammed Microgel Inks for 3D Printing Applications. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2019; 6:1801076. [PMID: 30643716 PMCID: PMC6325587 DOI: 10.1002/advs.201801076] [Citation(s) in RCA: 197] [Impact Index Per Article: 39.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Revised: 08/19/2018] [Indexed: 05/10/2023]
Abstract
3D printing involves the development of inks that exhibit the requisite properties for both printing and the intended application. In bioprinting, these inks are often hydrogels with controlled rheological properties that can be stabilized after deposition. Here, an alternate approach is developed where the ink is composed exclusively of jammed microgels, which are designed to incorporate a range of properties through microgel design (e.g., composition, size) and through the mixing of microgels. The jammed microgel inks are shear-thinning to permit flow and rapidly recover upon deposition, including on surfaces or when deposited in 3D within hydrogel supports, and can be further stabilized with secondary cross-linking. This platform allows the use of microgels engineered from various materials (e.g., thiol-ene cross-linked hyaluronic acid (HA), photo-cross-linked poly(ethylene glycol), thermo-sensitive agarose) and that incorporate cells, where the jamming process and printing do not decrease cell viability. The versatility of this particle-based approach opens up numerous potential biomedical applications through the printing of a more diverse set of inks.
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Affiliation(s)
- Christopher B. Highley
- Department of BioengineeringUniversity of Pennsylvania210 South 33rd StreetPhiladelphiaPA19104USA
| | - Kwang Hoon Song
- Department of BioengineeringUniversity of Pennsylvania210 South 33rd StreetPhiladelphiaPA19104USA
| | - Andrew C. Daly
- Department of BioengineeringUniversity of Pennsylvania210 South 33rd StreetPhiladelphiaPA19104USA
| | - Jason A. Burdick
- Department of BioengineeringUniversity of Pennsylvania210 South 33rd StreetPhiladelphiaPA19104USA
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420
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Destgeer G, Hashmi A, Park J, Ahmed H, Afzal M, Sung HJ. Microparticle self-assembly induced by travelling surface acoustic waves. RSC Adv 2019; 9:7916-7921. [PMID: 35521193 PMCID: PMC9061445 DOI: 10.1039/c8ra09859j] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Accepted: 03/05/2019] [Indexed: 01/04/2023] Open
Abstract
We present an acoustofluidic method based on travelling surface acoustic waves (TSAWs) to induce self-assembly of microparticles inside a microfluidic channel. The particles are trapped above an interdigitated transducer, placed directly beneath the microchannel, by the TSAW-based direct acoustic radiation force (ARF). This approach was applied to trap 10 μm polystyrene particles, which were pushed towards the ceiling of the microchannel by 72 MHz TSAWs to form single- and multiple-layer colloidal structures. The repair of cracks and defects within the crystal lattice occurs as part of the self-assembly process. The sample flow through the first inlet can be switched with a buffer flow through the second inlet to control the number of particles assembled in the crystalline structure. The constant flow-induced Stokes drag force on the particles is balanced by the opposing TSAW-based ARF. This force balance is essential for the acoustics-based self-assembly of microparticles inside the microchannel. Moreover, we studied the effects of varying input voltage and fluid flow rate on the position and shape of the colloidal structure. The active self-assembly of microparticles into crystals with multiple layers can be used in the bottom-up fabrication of colloidal structures with dimensions greater than 500 μm × 500 μm, which is expected to have important applications in various fields. We present an acoustofluidic method based on travelling surface acoustic waves (TSAWs) for the self-assembly of microparticles inside a microfluidic channel.![]()
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Affiliation(s)
| | - Ali Hashmi
- Institut de Biologie du Développement de Marseille (IBDM)
- France
| | - Jinsoo Park
- Department of Mechanical Engineering
- KAIST
- Daejeon 34141
- Korea
| | - Husnain Ahmed
- Department of Mechanical Engineering
- KAIST
- Daejeon 34141
- Korea
| | - Muhammad Afzal
- Department of Mechanical Engineering
- KAIST
- Daejeon 34141
- Korea
| | - Hyung Jin Sung
- Department of Mechanical Engineering
- KAIST
- Daejeon 34141
- Korea
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421
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Chen G, Yu Y, Wu X, Wang G, Gu G, Wang F, Ren J, Zhang H, Zhao Y. Microfluidic Electrospray Niacin Metal-Organic Frameworks Encapsulated Microcapsules for Wound Healing. RESEARCH (WASHINGTON, D.C.) 2019; 2019:6175398. [PMID: 31549071 PMCID: PMC6750103 DOI: 10.34133/2019/6175398] [Citation(s) in RCA: 78] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Accepted: 04/01/2019] [Indexed: 12/31/2022]
Abstract
Niacin metal-organic frameworks (MOFs) encapsulated microcapsules with alginate shells and copper-/zinc-niacin framework cores were in situ synthesized by using a microfluidic electrospray approach for wound healing. As the alginate shells were bacteria-responsively degradable, the niacin MOFs encapsulated microcapsules could intelligently, controllably, and programmably release calcium, copper, and zinc ions, depending on the degree of infections. The released ions could not only kill microbes by destroying their membrane and inducing the outflow of nutrient substance, but also activate copper/zinc superoxide dismutase (Cu/Zn-SOD) to eliminate oxygen free radicals and rescue the cells from oxidative stress injury. Furthermore, the simultaneously released niacin could promote hemangiectasis and absorption of functional metal ions. Thus, the niacin MOFs encapsulated microcapsules were imparted with outstanding antibacterial, antioxidant, and angiogenesis properties. Based on an in vivo study, we have also demonstrated that the chronic wound healing process of an infected full-thickness skin defect model could be significantly enhanced by using the niacin MOFs encapsulated microcapsules as therapeutic agent. Therefore, the microfluidic electrospray niacin MOFs encapsulated microcapsules are potential for clinical applications.
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Affiliation(s)
- Guopu Chen
- Research Institute of General Surgery, Jinling Hospital, Medical School of Nanjing University, Nanjing 210002, China
| | - Yunru Yu
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
| | - Xiuwen Wu
- Research Institute of General Surgery, Jinling Hospital, Medical School of Nanjing University, Nanjing 210002, China
| | - Gefei Wang
- Research Institute of General Surgery, Jinling Hospital, Medical School of Nanjing University, Nanjing 210002, China
| | - Guosheng Gu
- Research Institute of General Surgery, Jinling Hospital, Medical School of Nanjing University, Nanjing 210002, China
| | - Feng Wang
- Research Institute of General Surgery, Jinling Hospital, Medical School of Nanjing University, Nanjing 210002, China
| | - Jianan Ren
- Research Institute of General Surgery, Jinling Hospital, Medical School of Nanjing University, Nanjing 210002, China
| | - Huidan Zhang
- School of Engineering and Applied Sciences and Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA
| | - Yuanjin Zhao
- Research Institute of General Surgery, Jinling Hospital, Medical School of Nanjing University, Nanjing 210002, China
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
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422
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Long Y, Wei H, Li J, Yao G, Yu B, Ni D, Gibson ALF, Lan X, Jiang Y, Cai W, Wang X. Effective Wound Healing Enabled by Discrete Alternative Electric Fields from Wearable Nanogenerators. ACS NANO 2018; 12:12533-12540. [PMID: 30488695 PMCID: PMC6307171 DOI: 10.1021/acsnano.8b07038] [Citation(s) in RCA: 152] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2018] [Accepted: 11/19/2018] [Indexed: 05/21/2023]
Abstract
Skin wound healing is a major health care issue. While electric stimulations have been known for decades to be effective for facilitating skin wound recovery, practical applications are still largely limited by the clumsy electrical systems. Here, we report an efficient electrical bandage for accelerated skin wound healing. On the bandage, an alternating discrete electric field is generated by a wearable nanogenerator by converting mechanical displacement from skin movements into electricity. Rat studies demonstrated rapid closure of a full-thickness rectangular skin wound within 3 days as compared to 12 days of usual contraction-based healing processes in rodents. From in vitro studies, the accelerated skin wound healing was attributed to electric field-facilitated fibroblast migration, proliferation, and transdifferentiation. This self-powered electric-dressing modality could lead to a facile therapeutic strategy for nonhealing skin wound treatment.
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Affiliation(s)
- Yin Long
- Department
of Materials Science and Engineering, University
of Wisconsin—Madison, Madison, Wisconsin 53706, United States
- State
Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of
China, Chengdu 610054, China
| | - Hao Wei
- Departments
of Radiology and Medical Physics, University
of Wisconsin—Madison, Madison, Wisconsin 53705, United States
- Department
of Nuclear Medicine, Union Hospital, Tongji
Medical College, Huazhong University of Science and Technology, Wuhan 430073, China
| | - Jun Li
- Department
of Materials Science and Engineering, University
of Wisconsin—Madison, Madison, Wisconsin 53706, United States
| | - Guang Yao
- Department
of Materials Science and Engineering, University
of Wisconsin—Madison, Madison, Wisconsin 53706, United States
- State
Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of
China, Chengdu 610054, China
| | - Bo Yu
- Departments
of Radiology and Medical Physics, University
of Wisconsin—Madison, Madison, Wisconsin 53705, United States
| | - Dalong Ni
- Departments
of Radiology and Medical Physics, University
of Wisconsin—Madison, Madison, Wisconsin 53705, United States
| | - Angela LF Gibson
- Department
of Surgery, University of Wisconsin—Madison, Madison, Wisconsin 53792, United States
| | - Xiaoli Lan
- Department
of Nuclear Medicine, Union Hospital, Tongji
Medical College, Huazhong University of Science and Technology, Wuhan 430073, China
| | - Yadong Jiang
- State
Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of
China, Chengdu 610054, China
| | - Weibo Cai
- Departments
of Radiology and Medical Physics, University
of Wisconsin—Madison, Madison, Wisconsin 53705, United States
- E-mail:
| | - Xudong Wang
- Department
of Materials Science and Engineering, University
of Wisconsin—Madison, Madison, Wisconsin 53706, United States
- E-mail:
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423
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Mao S, Zhang Q, Liu W, Huang Q, Khan M, Zhang W, Lin C, Uchiyama K, Lin JM. Chemical operations on a living single cell by open microfluidics for wound repair studies and organelle transport analysis. Chem Sci 2018; 10:2081-2087. [PMID: 30881632 PMCID: PMC6381548 DOI: 10.1039/c8sc05104f] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Accepted: 11/27/2018] [Indexed: 12/18/2022] Open
Abstract
We report a laminar flow based approach that is capable of precisely cutting off or treating a portion of a single cell from its remaining portion in its original adherent state.
Single cells are increasingly recognized to be capable of wound repair that is important for our mechanistic understanding of cell biology. The lack of flexible, facile, and friendly subcellular treatment methods has hindered single-cell wound repair studies and organelle transport analyses. Here we report a laminar flow based approach, we call it fluid cell knife (Fluid CK), that is capable of precisely cutting off or treating a portion of a single cell from its remaining portion in its original adherent state. Local operations on portions of a living single cell in its adherent culture state were applied to various types of cells. Temporal wound repair was successfully observed. Moreover, we successfully stained portions of a living single cell to measure the organelle transport speed (mitochondria as a model) inside a cell. This technique opens up new avenues for cellular wound repair and subcellular behavior analyses.
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Affiliation(s)
- Sifeng Mao
- Department of Chemistry , Beijing Key Laboratory of Microanalytical Methods and Instrumentation , MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology , Tsinghua University , Beijing 100084 , China .
| | - Qiang Zhang
- Department of Chemistry , Beijing Key Laboratory of Microanalytical Methods and Instrumentation , MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology , Tsinghua University , Beijing 100084 , China .
| | - Wu Liu
- Department of Chemistry , Beijing Key Laboratory of Microanalytical Methods and Instrumentation , MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology , Tsinghua University , Beijing 100084 , China .
| | - Qiushi Huang
- Department of Chemistry , Beijing Key Laboratory of Microanalytical Methods and Instrumentation , MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology , Tsinghua University , Beijing 100084 , China .
| | - Mashooq Khan
- Department of Chemistry , Beijing Key Laboratory of Microanalytical Methods and Instrumentation , MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology , Tsinghua University , Beijing 100084 , China .
| | - Wanling Zhang
- Department of Chemistry , Beijing Key Laboratory of Microanalytical Methods and Instrumentation , MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology , Tsinghua University , Beijing 100084 , China .
| | - Caihou Lin
- Department of Neurosurgery , Fujian Medical University Union Hospital , Fuzhou , Fujian 350001 , China
| | - Katsumi Uchiyama
- Department of Applied Chemistry , Graduate School of Urban Environmental Sciences , Tokyo Metropolitan University , Minamiohsawa , Hachioji , Tokyo 192-0397 , Japan
| | - Jin-Ming Lin
- Department of Chemistry , Beijing Key Laboratory of Microanalytical Methods and Instrumentation , MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology , Tsinghua University , Beijing 100084 , China .
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424
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Zhou L, Fan L, Yi X, Zhou Z, Liu C, Fu R, Dai C, Wang Z, Chen X, Yu P, Chen D, Tan G, Wang Q, Ning C. Soft Conducting Polymer Hydrogels Cross-Linked and Doped by Tannic Acid for Spinal Cord Injury Repair. ACS NANO 2018; 12:10957-10967. [PMID: 30285411 DOI: 10.1021/acsnano.8b04609] [Citation(s) in RCA: 171] [Impact Index Per Article: 28.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Mimicking soft tissue mechanical properties and the high conductivity required for electrical transmission in the native spinal cord is critical in nerve tissue regeneration scaffold designs. However, fabricating scaffolds of high conductivity, tissue-like mechanical properties, and excellent biocompatibility simultaneously remains a great challenge. Here, a soft, highly conductive, biocompatible conducting polymer hydrogel (CPH) based on a plant-derived polyphenol, tannic acid (TA), cross-linking and doping conducting polypyrrole (PPy) chains is developed to explore its therapeutic efficacy after a spinal cord injury (SCI). The developed hydrogels exhibit an excellent electronic conductivity (0.05-0.18 S/cm) and appropriate mechanical properties (0.3-2.2 kPa), which can be achieved by controlling TA concentration. In vitro, a CPH with a higher conductivity accelerated the differentiation of neural stem cells (NSCs) into neurons while suppressing the development of astrocytes. In vivo, with relatively high conductivity, the CPH can activate endogenous NSC neurogenesis in the lesion area, resulting in significant recovery of locomotor function. Overall, our findings evidence that the CPHs without being combined with any other therapeutic agents have stimulated tissue repair following an SCI and thus have important implications for future biomaterial designs for SCI therapy.
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Affiliation(s)
| | - Lei Fan
- Department of Spine Surgery , The Third Affiliated Hospital of Sun Yat-sen University , Guangzhou 510630 , China
| | | | - Zhengnan Zhou
- School of Chemical Engineering and Light Industry , Guangdong University of Technology , Guangzhou 510006 , China
| | - Can Liu
- Department of Spine Surgery , The Third Affiliated Hospital of Sun Yat-sen University , Guangzhou 510630 , China
| | | | - Cong Dai
- School of Chemical Engineering and Light Industry , Guangdong University of Technology , Guangzhou 510006 , China
| | | | - Xiuxing Chen
- VIP Inpatient Department , Sun Yat-sen University Cancer Center , Guangzhou 510060 , China
| | | | - Dafu Chen
- Laboratory of Bone Tissue Engineering, Beijing Research Institute of Orthopaedics and Traumatology , Beijing JiShuiTan Hospital , Beijing 100035 , China
| | - Guoxin Tan
- School of Chemical Engineering and Light Industry , Guangdong University of Technology , Guangzhou 510006 , China
| | - Qiyou Wang
- Department of Spine Surgery , The Third Affiliated Hospital of Sun Yat-sen University , Guangzhou 510630 , China
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425
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Darling NJ, Sideris E, Hamada N, Carmichael ST, Segura T. Injectable and Spatially Patterned Microporous Annealed Particle (MAP) Hydrogels for Tissue Repair Applications. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2018; 5:1801046. [PMID: 30479933 PMCID: PMC6247047 DOI: 10.1002/advs.201801046] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Indexed: 05/26/2023]
Abstract
Spatially patterned hydrogels are becoming increasingly popular in the field of regenerative medicine and tissue repair because of their ability to guide cell infiltration and migration. However, postfabrication technologies are usually required to spatially pattern a hydrogel, making these hydrogels difficult to translate into the clinic. Here, an injectable spatially patterned hydrogel is reported using hyaluronic acid (HA)-based particle hydrogels. These particle hydrogels are sequentially loaded into a syringe to form a pattern and, once injected, they maintain the pattern. The applicability of this hydrogel in a wound healing skin model, a subcutaneous implant model, as well as a stroke brain model is examined and distinct patterning in all models tested is shown. This injectable and spatially patterned hydrogel can be used to create physical or biochemical gradients. Further, this design can better match the scaffold properties within the physical location of the tissue (e.g., wound border vs wound center). This allows for better design features within the material that promote repair and regeneration.
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Affiliation(s)
- Nicole J. Darling
- Department of Chemical and Biomolecular EngineeringUniversity of California, Los Angeles420 Westwood PlazaLos AngelesCA90095USA
| | - Elias Sideris
- Department of Chemical and Biomolecular EngineeringUniversity of California, Los Angeles420 Westwood PlazaLos AngelesCA90095USA
| | - Naomi Hamada
- Department of Chemical and Biomolecular EngineeringUniversity of California, Los Angeles420 Westwood PlazaLos AngelesCA90095USA
| | - S. Thomas Carmichael
- Department of NeurologyDavid Geffen School of MedicineUniversity of California, Los Angeles621 Charles Young DriveLos AngelesCA90095USA
| | - Tatiana Segura
- Department of Chemical and Biomolecular EngineeringUniversity of California, Los Angeles420 Westwood PlazaLos AngelesCA90095USA
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426
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Prasad YS, Saritha B, Tamizhanban A, Lalitha K, Kabilan S, Maheswari CU, Sridharan V, Nagarajan S. Enzymatic synthesis and self-assembly of glycolipids: robust self-healing and wound closure performance of assembled soft materials. RSC Adv 2018; 8:37136-37145. [PMID: 35557831 PMCID: PMC9089313 DOI: 10.1039/c8ra07703g] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2018] [Accepted: 10/22/2018] [Indexed: 11/21/2022] Open
Abstract
In developing countries, wounds are a major health concern and pose a significant problem. Hence, the development of new materials that can act as scaffolds for in situ tissue regeneration and regrowth is necessary. In this report, we present a new class of injectable oleogel and composite gel derived from glycolipids that provide reversible interlinked 3D fiberous network architecture for effective wound closure by tissue regrowth and regeneration. Glycolipids were derived from α-chloralose and various vinyl esters using Novozyme 435, an immobilized lipase B from Candida antarctica as a catalyst, in good yield. These glycolipids undergo spontaneous self-assembly in paraffin oil to form an oleogel, in which curcumin was successfully incorporated to generate a composite gel. Morphological analysis of the oleogel and composite gel clearly revealed the formation of a 3D fiberous network. Rheological investigation revealed the thermal and mechanical processability of the oleogel and composite gel under various experimental conditions. Interestingly, the developed injectable oleogel and composite gel are able to accelerate the wound healing process by regulating the overlapping phases of inflammation, cell proliferation and extracellular matrix remodelling. Since chloralose displays anesthetic properties, this study will establish a new strategy to develop anesthetic wound healing oleogels in the future.
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Affiliation(s)
- Yadavali Siva Prasad
- Department of Chemistry, School of Chemical and Biotechnology, SASTRA Deemed University Thanjavur - 613401 Tamil Nadu India
| | - Balasubramani Saritha
- Department of Chemistry, School of Chemical and Biotechnology, SASTRA Deemed University Thanjavur - 613401 Tamil Nadu India
| | - Ayyapillai Tamizhanban
- Department of Chemistry, School of Chemical and Biotechnology, SASTRA Deemed University Thanjavur - 613401 Tamil Nadu India
| | - Krishnamoorthy Lalitha
- Department of Chemistry, School of Chemical and Biotechnology, SASTRA Deemed University Thanjavur - 613401 Tamil Nadu India
| | - Sakthivel Kabilan
- Department of Chemistry, School of Chemical and Biotechnology, SASTRA Deemed University Thanjavur - 613401 Tamil Nadu India
| | - C Uma Maheswari
- Department of Chemistry, School of Chemical and Biotechnology, SASTRA Deemed University Thanjavur - 613401 Tamil Nadu India
| | - Vellaisamy Sridharan
- Department of Chemistry and Chemical Sciences, Central University of Jammu, Rahya-Suchani (Bagla) District-Samba Jammu-181143 Jammu and Kashmir India
| | - Subbiah Nagarajan
- Department of Chemistry, School of Chemical and Biotechnology, SASTRA Deemed University Thanjavur - 613401 Tamil Nadu India
- Department of Chemistry, National Institute of Technology Warangal Warangal-506004 Telangana India +91-9940430715
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427
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Qu J, Zhao X, Liang Y, Zhang T, Ma PX, Guo B. Antibacterial adhesive injectable hydrogels with rapid self-healing, extensibility and compressibility as wound dressing for joints skin wound healing. Biomaterials 2018; 183:185-199. [DOI: 10.1016/j.biomaterials.2018.08.044] [Citation(s) in RCA: 877] [Impact Index Per Article: 146.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Revised: 08/12/2018] [Accepted: 08/20/2018] [Indexed: 12/25/2022]
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428
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Huang XW, Wei JJ, Zhang MY, Zhang XL, Yin XF, Lu CH, Song JB, Bai SM, Yang HH. Water-Based Black Phosphorus Hybrid Nanosheets as a Moldable Platform for Wound Healing Applications. ACS APPLIED MATERIALS & INTERFACES 2018; 10:35495-35502. [PMID: 30251823 DOI: 10.1021/acsami.8b12523] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Black phosphorus (BP) nanosheets with unique biocompatibility and superior optical performance have attracted enormous attention in material science. However, their instability and poor solution-processability severely limit their clinical applications. In this work, we demonstrate the use of silk fibroin (SF) as an exfoliating agent to produce thin-layer BP nanosheets with long-term stability and facile solution-processability. Presence of SF prevents rapid oxidation and degradation of the resultant BP nanosheets, enhancing their performance in physiological environment. The SF-modified BP nanosheets exhibit subtle solution-processability and are fabricated into various BP-based material formats. As superior photothermal agents, BP-based wound dressings effectively prevent bacterial infection and promote wound repair. Therefore, this work opens new avenues for unlocking current challenges of BP nanosheet applications for practical biomedical purposes.
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Affiliation(s)
| | | | | | | | - Xiao-Fei Yin
- The First Institute of Oceanography , State Oceanic Administration , Qingdao 266061 , People's Republic of China
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429
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Hou S, Lake R, Park S, Edwards S, Jones C, Jeong KJ. Injectable Macroporous Hydrogel Formed by Enzymatic Cross-Linking of Gelatin Microgels. ACS APPLIED BIO MATERIALS 2018; 1:1430-1439. [PMID: 31701093 DOI: 10.1021/acsabm.8b00380] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Injectable hydrogels can be useful tools for facilitating wound healing since they conform to the irregular shapes of wounds, serving as a temporary matrix during the healing process. However, the lack of inherent pore structures of most injectable hydrogels prohibits desired interactions with the cells of the surrounding tissues limiting their clinical efficacy. Here, we introduce a simple, cost-effective and highly biofunctional injectable macroporous hydrogel made of gelatin microgels crosslinked by microbial transglutaminase (mTG). Pores are created by the interstitial space among the microgels. A water-in-oil emulsion technique was used to create gelatin microgels of an average size of 250μm in diameter. When crosslinked with mTG, the microgels adhered to each other to form a bulk hydrogel with inherent pores large enough for cell migration. The viscoelastic properties of the porous hydrogel were similar to those of nonporous gelatin hydrogel made by adding mTG to a homogeneous gelatin solution. The porous hydrogel supported higher cellular proliferation of human dermal fibroblasts (hDFs) than the nonporous hydrogel over two weeks, and allowed the migration of hDFs into the pores. Conversely, the hDFs were unable to permeate the surface of the nonporous hydrogel. To demonstrate its potential use in wound healing, the gelatin microgels were injected with mTG into a cut out section of an excised porcine cornea. Due to the action of mTG, the porous hydrogel stably adhered to the cornea tissue for two weeks. Confocal images showed that a large number of cells from the cornea tissue migrated into the interstitial space of the porous hydrogel. The porous hydrogel was also used for the controlled release of platelet-derived growth factor (PDGF), increasing the proliferation of hDFs compared to the nonporous hydrogel. This gelatin microgel-based porous hydrogel will be a useful tool for wound healing and tissue engineering.
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Affiliation(s)
- Shujie Hou
- Department of Chemical Engineering, University of New Hampshire, Durham, NH 03824
| | - Rachel Lake
- Department of Chemical Engineering, University of New Hampshire, Durham, NH 03824
| | - Shiwha Park
- Department of Chemical Engineering, University of New Hampshire, Durham, NH 03824
| | - Seth Edwards
- Department of Chemical Engineering, University of New Hampshire, Durham, NH 03824
| | - Chante Jones
- Department of Chemical Engineering, University of New Hampshire, Durham, NH 03824
| | - Kyung Jae Jeong
- Department of Chemical Engineering, University of New Hampshire, Durham, NH 03824
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430
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Jiang Z, Jiang K, McBride R, Oakey JS. Comparative cytocompatibility of multiple candidate cell types to photoencapsulation in PEGNB/PEGDA macroscale or microscale hydrogels. Biomed Mater 2018; 13:065012. [PMID: 30191888 PMCID: PMC6215765 DOI: 10.1088/1748-605x/aadf9a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The encapsulation of live cells into photopolymerized hydrogel scaffolds has the potential to augment or repair tissue defects, establish versatile regenerative medicine strategies, and be developed as well-defined, yet tunable microenvironments to study fundamental cellular behavior. However, hydrogel fabrication limitations constrain most studies to macroscale hydrogel scaffolds encapsulating millions of cells. These macroscale materials possess regions of heterogeneous photopolymerization conditions and are therefore poor platforms to identify the response of individual cells to encapsulation. Recently, microfluidic droplet-based hydrogel miniaturization and cell encapsulation offers high-throughput, reproducible, and continuous fabrication. Reports of post-encapsulation cell viability, however, vary widely among specific techniques. Furthermore, different cell types often exhibit different level of tolerance to photoencapsulation-induced toxicity. Accordingly, we evaluate the cellular tolerance of various encapsulation techniques and photopolymerization parameters for four mammalian cell types, with potential applications in tissue regeneration, using polyethylene glycol diacrylate or polyethylene glycol norbornene (PEGNB) hydrogels on micro- and macro-length scales. We found PEGNB provides excellent cellular tolerance and supports long-term cell survival by mitigating the deleterious effects of acrylate photopolymerization, which are exacerbated at diminishing volumes. PEGNB, therefore, is an excellent candidate for hydrogel miniaturization. PEGNB hydrogel properties, however, were found to have variable effects on encapsulating different cell candidates. This study could provide guidance for cell encapsulation practices in tissue engineering and regenerative medicine research.
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Affiliation(s)
- Zhongliang Jiang
- Department of Chemical Engineering, University of Wyoming, Laramie, United States of America
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431
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Abstract
Hydrogels are used extensively in wound management. Many wounds are highly susceptible to infection and hydrogels can provide localized antibacterial delivery to treat and prevent this infection. There are several key considerations in designing antibacterial hydrogels for wound therapy, including preserving activity of encapsulated antibacterial agents, controlling drug release timescales and concentrations, and having the ability to conform to various wound configurations. In this work, we have used gellan, a U.S. Food and Drug Administration approved food additive, to develop antibiotic loaded hydrogels focusing on these criteria. These hydrogels were formed to exhibit a range of mechanical properties, which were investigated using oscillatory rheology. We denoted hydrogels formed using 1% w/v gellan and 1 mM CaCl2"ointment" hydrogels and those formed using 4% w/v gellan and 7 mM CaCl2"sheet" hydrogels. Vancomycin, a broad-spectrum antibiotic against Gram-positive bacteria, was encapsulated in these hydrogels both directly and/or in graphitized carbon black nanoparticles (CNPs). We found that vancomycin released from both sheet and ointment hydrogels at therapeutically effective concentrations over 9 days with CNPs and 6 days without CNPs. Applying the Ritger-Peppas and Peppas-Sahlin semi-empirical drug release models to sheet hydrogels, we determined that Fickian diffusion dominates release while case II relaxation also has a small contribution. The sheet hydrogels exhibited a larger overall release of the drug (83.6 ± 1.6% compared to 67.0 ± 2.6% for ointments), which was attributed to the larger swelling resulting from osmotic pressure differences between the hydrogel formulations and the release buffer. We also suggest that final drug release amounts are influenced by intermolecular interactions between vancomycin and gellan, which were observed via quartz crystal microbalance with dissipation monitoring. Lastly, we examined the potential for future in vivo translation. We demonstrated in vitro growth inhibition of Staphylococcus aureus (S. aureus) and methicillin-resistant S. aureus in the presence of these hydrogels, demonstrating that vancomycin activity is preserved upon encapsulation. We also showed that these hydrogels are non-toxic to important wound healing cells including fibroblasts and mesenchymal stem cells.
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Affiliation(s)
- Shashank Shukla
- School of Engineering, Center for Biomedical Engineering, Institute for Molecular and Nanoscale Innovation, Brown University, Providence, RI, USA.
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432
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Youngblood RL, Truong NF, Segura T, Shea LD. It's All in the Delivery: Designing Hydrogels for Cell and Non-viral Gene Therapies. Mol Ther 2018; 26:2087-2106. [PMID: 30107997 PMCID: PMC6127639 DOI: 10.1016/j.ymthe.2018.07.022] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2018] [Revised: 07/24/2018] [Accepted: 07/24/2018] [Indexed: 01/08/2023] Open
Abstract
Hydrogels provide a regenerative medicine platform with their ability to create an environment that supports transplanted or endogenous infiltrating cells and enables these cells to restore or replace the function of tissues lost to disease or trauma. Furthermore, these systems have been employed as delivery vehicles for therapeutic genes, which can direct and/or enhance the function of the transplanted or endogenous cells. Herein, we review recent advances in the development of hydrogels for cell and non-viral gene delivery through understanding the design parameters, including both physical and biological components, on promoting transgene expression, cell engraftment, and ultimately cell function. Furthermore, this review identifies emerging opportunities for combining cell and gene delivery approaches to overcome challenges to the field.
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Affiliation(s)
- Richard L Youngblood
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI 48109, USA
| | - Norman F Truong
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Tatiana Segura
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, Los Angeles, CA 90095, USA; Department of Biomedical Engineering, Duke University, Durham, NC 27708, USA.
| | - Lonnie D Shea
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI 48109, USA.
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433
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Li F, Truong VX, Fisch P, Levinson C, Glattauer V, Zenobi-Wong M, Thissen H, Forsythe JS, Frith JE. Cartilage tissue formation through assembly of microgels containing mesenchymal stem cells. Acta Biomater 2018; 77:48-62. [PMID: 30006317 DOI: 10.1016/j.actbio.2018.07.015] [Citation(s) in RCA: 76] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Revised: 06/14/2018] [Accepted: 07/09/2018] [Indexed: 01/06/2023]
Abstract
Current clinical approaches to treat articular cartilage degeneration provide only a limited ability to regenerate tissue with long-term durability and functionality. In this application, injectable bulk hydrogels and microgels containing stem cells can provide a suitable environment for tissue regeneration. However insufficient cell-cell interactions, low differentiation efficiency and poor tissue adhesion hinder the formation of high-quality hyaline type cartilage. Here, we have designed a higher order tissue-like structure using injectable cell-laden microgels as the building blocks to achieve human bone marrow-derived mesenchymal stem cell (hBMSC) long-term maintenance and chondrogenesis. We have demonstrated that a 4-arm poly(ethylene glycol)-N-hydroxysuccinimide (NHS) crosslinker induces covalent bonding between the microgel building blocks as well as the surrounding tissue mimic. The crosslinking process assembles the microgels into a 3D construct and preserves the viability and cellular functions of the encapsulated hBMSCs. This assembled microgel construct encourages upregulation of chondrogenic markers in both gene and glycosaminoglycan (GAG) expression levels. In addition, the regenerated tissue in the assembled microgels stained positively with Alcian blue and Safranin O exhibiting unique hyaline-like cartilage features. Furthermore, the immunostaining showed a favourable distribution and significantly higher content of type II collagen in the assembled microgels when compared to both the bulk hydrogel and pellet cultures. Collectively, this tissue adhesive hBMSC-laden microgel construct provides potential clinical opportunities for articular cartilage repair and other applications in regenerative medicine. STATEMENT OF SIGNIFICANCE A reliable approach to reconstruct durable and fully functional articular cartilage tissue is required for effective clinical therapies. Here, injectable hydrogels together with cell-based therapies offer new treatment strategies in cartilage repair. For effective cartilage regeneration, the injectable hydrogel system needs to be bonded to the surrounding tissue and at the same time needs to be sufficiently stable for prolonged chondrogenesis. In this work, we utilised injectable hBMSC-laden microgels as the building blocks to create an assembled construct via N-hydroxysuccinimide-amine coupling. This crosslinking process also allows for rapid bonding between the assembled microgels and a surrounding tissue mimic. The resultant assembled microgel-construct provides both a physically stable and biologically dynamic environment for hBMSC chondrogenesis, leading to the production of a mature hyaline type cartilage structure.
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434
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Nagahama K, Oyama N, Ono K, Hotta A, Kawauchi K, Nishikata T. Nanocomposite injectable gels capable of self-replenishing regenerative extracellular microenvironments for in vivo tissue engineering. Biomater Sci 2018; 6:550-561. [PMID: 29379910 DOI: 10.1039/c7bm01167a] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Injectable hydrogels are biomaterials that have the potential to provide scaffolds to cells for in situ tissue regeneration with a minimally invasive implantation procedure. The success of in vivo tissue engineering utilizing injectable gels depends on providing cells with appropriate scaffolds that present an instructive extracellular microenvironment, which strongly influences the survival, proliferation, organization, and function of cells encapsulated within gels. One of the most important abilities of injectable gels to achieve this function is to adsorb and retain a wide variety of requisite bioactive molecules including nutrients, extracellular matrices, and growth/differentiation factors within gels. Previously, we developed nanocomposite injectable gels fabricated by simple combination of common biodegradable copolymers, poly(lactide-co-glycolide)-b-poly(ethylene glycol)-b-poly(lactide-co-glycolide) (PLGA-PEG-PLGA), and synthetic clay nanoparticles (LAPONITE®). We revealed that the nanocomposite injectable gels strongly adsorb ECM molecules including collagen and heparin within gels and retain them due to the ability of LAPONITE® in synchronization with the degradation of PLGA-PEG-PLGA and subsequent release of the degradation products. Human dermal fibroblast cells cultured on the nanocomposite gels showed enough high cell viability and proliferation for at least a week. Moreover, various kinds of human cells encapsulated within the nanocomposite gels exhibited significantly higher survival, proliferation, and three-dimensional organization in comparison with the PLGA-PEG-PLGA gel, LAPONITE® gel, and Matrigel. Furthermore, transplantation of mouse myoblast cells with the nanocomposite gels in model mice of skeletal muscle injury dramatically enhanced tissue regeneration and functional recovery, whereas cell transplantation with the PLGA-PEG-PLGA gel did not. Thus, the nanocomposite injectable gels possess unique abilities to self-replenish the regenerative extracellular microenvironment within the gels in the body, demonstrating the potential utility of the nanocomposite injectable gels for in vivo tissue engineering.
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Affiliation(s)
- Koji Nagahama
- Department of Nanobiochemistry, Frontiers of Innovative Research in Science and Technology (FIRST), Konan University, 7-1-20 Minatojima-Minamimachi, Kobe 650-0047, Japan.
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435
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Li M, van Zee M, Goda K, Di Carlo D. Size-based sorting of hydrogel droplets using inertial microfluidics. LAB ON A CHIP 2018; 18:2575-2582. [PMID: 30046787 DOI: 10.1039/c8lc00568k] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Hydrogel droplets encapsulating cells and molecules provide a unique platform in biochemistry, biology, and medicine, including single-cell and single-molecule analysis, directed molecular evolution, and detection of cellular secretions. The ability to prepare hydrogel droplets with high monodispersity can lead to synchronization of populations, more controlled biomaterials, and more quantitative assays. Here, we present an inertial microfluidic device for passive, continuous, and high-throughput sorting of hydrogel droplets by size. The sorting is achieved due to size-dependent lateral inertial equilibrium positions: hydrogel droplets of different sizes have different equilibrium positions under the combined effects of shear-gradient lift and wall-effect lift forces. We apply this separation technique to isolate smaller hydrogel droplets containing microalgal colonies from larger empty droplets. We found that hydrogel droplets containing microalga Euglena gracilis (E. gracilis) shrink as cells grow and divide, while empty hydrogel droplets retain their size. Cell-laden hydrogel droplets were collected with up to 93.6% purity, and enrichment factor up to 5.51. After sorting, we were able to recover cells from hydrogel droplets without significantly affecting cell viability.
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Affiliation(s)
- Ming Li
- Department of Bioengineering, University of California, Los Angeles, USA.
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436
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Yang L, Chueng STD, Li Y, Patel M, Rathnam C, Dey G, Wang L, Cai L, Lee KB. A biodegradable hybrid inorganic nanoscaffold for advanced stem cell therapy. Nat Commun 2018; 9:3147. [PMID: 30089775 PMCID: PMC6082841 DOI: 10.1038/s41467-018-05599-2] [Citation(s) in RCA: 64] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2017] [Accepted: 07/17/2018] [Indexed: 01/06/2023] Open
Abstract
Stem cell transplantation, as a promising treatment for central nervous system (CNS) diseases, has been hampered by crucial issues such as a low cell survival rate, incomplete differentiation, and limited neurite outgrowth in vivo. Addressing these hurdles, scientists have designed bioscaffolds that mimic the natural tissue microenvironment to deliver physical and soluble cues. However, several significant obstacles including burst release of drugs, insufficient cellular adhesion support, and slow scaffold degradation rate remain to be overcome before the full potential of bioscaffold-based stem-cell therapies can be realized. To this end, we developed a biodegradable nanoscaffold-based method for enhanced stem cell transplantation, differentiation, and drug delivery. These findings collectively support the therapeutic potential of our biodegradable hybrid inorganic (BHI) nanoscaffolds for advanced stem cell transplantation and neural tissue engineering.
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Affiliation(s)
- Letao Yang
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, 123 Bevier Road, Piscataway, NJ, 08854, USA
| | - Sy-Tsong Dean Chueng
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, 123 Bevier Road, Piscataway, NJ, 08854, USA
| | - Ying Li
- Department of Biomedical Engineering, Rutgers, The State University of New Jersey, 599 Taylor Road, Piscataway, NJ, 08854, USA
| | - Misaal Patel
- Department of Biomedical Engineering, Rutgers, The State University of New Jersey, 599 Taylor Road, Piscataway, NJ, 08854, USA
| | - Christopher Rathnam
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, 123 Bevier Road, Piscataway, NJ, 08854, USA
| | - Gangotri Dey
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, 123 Bevier Road, Piscataway, NJ, 08854, USA
| | - Lu Wang
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, 123 Bevier Road, Piscataway, NJ, 08854, USA
| | - Li Cai
- Department of Biomedical Engineering, Rutgers, The State University of New Jersey, 599 Taylor Road, Piscataway, NJ, 08854, USA
| | - Ki-Bum Lee
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, 123 Bevier Road, Piscataway, NJ, 08854, USA.
- Department of Biomedical Engineering, Rutgers, The State University of New Jersey, 599 Taylor Road, Piscataway, NJ, 08854, USA.
- College of Pharmacy, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul, 02447, Korea.
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437
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Motlaq VF, Knudsen KD, Nyström B. Effect of PEGylation on the stability of thermoresponsive nanogels. J Colloid Interface Sci 2018; 524:245-255. [DOI: 10.1016/j.jcis.2018.04.024] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Revised: 03/29/2018] [Accepted: 04/05/2018] [Indexed: 01/04/2023]
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438
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Li W, Zhang L, Ge X, Xu B, Zhang W, Qu L, Choi CH, Xu J, Zhang A, Lee H, Weitz DA. Microfluidic fabrication of microparticles for biomedical applications. Chem Soc Rev 2018; 47:5646-5683. [PMID: 29999050 PMCID: PMC6140344 DOI: 10.1039/c7cs00263g] [Citation(s) in RCA: 294] [Impact Index Per Article: 49.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Droplet microfluidics offers exquisite control over the flows of multiple fluids in microscale, enabling fabrication of advanced microparticles with precisely tunable structures and compositions in a high throughput manner. The combination of these remarkable features with proper materials and fabrication methods has enabled high efficiency, direct encapsulation of actives in microparticles whose features and functionalities can be well controlled. These microparticles have great potential in a wide range of bio-related applications including drug delivery, cell-laden matrices, biosensors and even as artificial cells. In this review, we briefly summarize the materials, fabrication methods, and microparticle structures produced with droplet microfluidics. We also provide a comprehensive overview of their recent uses in biomedical applications. Finally, we discuss the existing challenges and perspectives to promote the future development of these engineered microparticles.
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Affiliation(s)
- Wen Li
- School of Materials Science & Engineering, Department of Polymer Materials, Shanghai University, 333 Nanchen Street, Shanghai 200444, China.
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439
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Sung B, Krieger J, Yu B, Kim MH. Colloidal gelatin microgels with tunable elasticity support the viability and differentiation of mesenchymal stem cells under pro-inflammatory conditions. J Biomed Mater Res A 2018; 106:2753-2761. [PMID: 30054959 DOI: 10.1002/jbm.a.36505] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Revised: 06/18/2018] [Accepted: 07/02/2018] [Indexed: 11/06/2022]
Abstract
Despite a promising potential for mesenchymal stem cells (MSCs) in tissue regeneration, a major challenge in MSC-based therapy has been associated with poor cell survival and low levels of cell integration into host tissue following transplantation. The objective of this study was to develop a gelatin-based colloidal microgel platform that enables the encapsulation of viable MSCs as well as confer fine-tuning of mechanical stiffness and low cytotoxicity. In this study, we report a facile method of fabricating gelatin-based microgel spheres for the encapsulation of MSCs using a water-in-oil mini-emulsification method, which is covalently crosslinked by genipin. At a given seeding cell number, there was a positive correlation between the size of the microsphere and the number of encapsulated MSCs. Controlling the crosslinking degree of gelatin matrix enabled a fine-tuning of mechanical stiffness of gel microsphere. MSCs within softer microgel exhibit more spread morphology than the cells in the stiffer matrix, while cells within stiffer matrix become more elongated morphology. Importantly, we show that the colloidal gelatin microgel could support the viability and differentiation of encapsulated MSCs in a pro-inflammatory environment. This study demonstrates the feasibility of using genipin-crosslinked gelatin gel microspheres as an injectable carrier of MSCs for tissue engineering applications, which can be further explored for MSC-based cell therapy for tissue repair. © 2018 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 106A: 2753-2761, 2018.
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Affiliation(s)
- Baeckkyoung Sung
- Department of Biological Sciences, Kent State University, Kent, Ohio.,Liquid Crystal Institute and Chemical Physics Interdisciplinary Program, Kent State University, Kent, Ohio
| | - Jess Krieger
- School of Biomedical Sciences, Kent State University, Kent, Ohio
| | - Bing Yu
- Department of Biological Sciences, Kent State University, Kent, Ohio
| | - Min-Ho Kim
- Department of Biological Sciences, Kent State University, Kent, Ohio.,School of Biomedical Sciences, Kent State University, Kent, Ohio
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440
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Schuhmann TG, Zhou T, Hong G, Lee JM, Fu TM, Park HG, Lieber CM. Syringe-injectable Mesh Electronics for Stable Chronic Rodent Electrophysiology. J Vis Exp 2018:58003. [PMID: 30080192 PMCID: PMC6126522 DOI: 10.3791/58003] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Implantable brain electrophysiology probes are valuable tools in neuroscience due to their ability to record neural activity with high spatiotemporal resolution from shallow and deep brain regions. Their use has been hindered, however, by mechanical and structural mismatches between the probes and brain tissue that commonly lead to micromotion and gliosis with resulting signal instability in chronic recording experiments. In contrast, following the implantation of ultraflexible mesh electronics via syringe injection, the mesh probes form a seamless, gliosis-free interface with the surrounding brain tissue that enables stable tracking of individual neurons on at least a year timescale. This protocol details the key steps in a typical mouse neural recording experiment using syringe-injectable mesh electronics, including the fabrication of mesh electronics in a standard photolithography-based process possible at many universities, loading mesh electronics into standard capillary needles, stereotaxic injection in vivo, connection of the mesh input/output to standard instrumentation interfaces, restrained or freely moving recording sessions, and histological sectioning of brain tissue containing mesh electronics. Representative neural recordings and histology data are presented. Investigators familiar with this protocol will have the knowledge necessary to incorporate mesh electronics into their own experiments and take advantage of the unique opportunities afforded by long-term stable neural interfacing, such as studies of aging processes, brain development, and the pathogenesis of brain disease.
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Affiliation(s)
- Thomas G Schuhmann
- John A. Paulson School of Engineering and Applied Sciences, Harvard University
| | - Tao Zhou
- Department of Chemistry and Chemical Biology, Harvard University
| | - Guosong Hong
- Department of Chemistry and Chemical Biology, Harvard University
| | - Jung Min Lee
- Department of Chemistry and Chemical Biology, Harvard University; Department of Physics, Korea University
| | - Tian-Ming Fu
- Department of Chemistry and Chemical Biology, Harvard University
| | | | - Charles M Lieber
- John A. Paulson School of Engineering and Applied Sciences, Harvard University; Department of Chemistry and Chemical Biology, Harvard University;
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441
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Prevascularization of dermal substitutes with adipose tissue-derived microvascular fragments enhances early skin grafting. Sci Rep 2018; 8:10977. [PMID: 30030486 PMCID: PMC6054621 DOI: 10.1038/s41598-018-29252-6] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Accepted: 07/09/2018] [Indexed: 02/07/2023] Open
Abstract
Split-thickness skin grafts (STSG) are still the gold standard for the treatment of most skin defects. Hence, there is an ongoing need to improve this procedure. For this purpose, we herein analyzed dermal matrices seeded with adipose tissue-derived microvascular fragments (ad-MVF) in a bradythrophic wound model. In additional experiments, the matrices were covered with autologous STSG 10 days after implantation. Green fluorescence protein (GFP)+ ad-MVF were isolated from C57BL/6-Tg(CAG-EGFP)1Osb/J mice and seeded onto collagen-glycosaminoglycan matrices. Non-seeded and prevascularized matrices were implanted into full-thickness skin defects on the skull of CD1 nu/nu mice for 21 days. Vascularization, lymphangiogenesis and incorporation of the matrices were analyzed using photo-acoustic imaging, trans-illumination stereomicroscopy, histology, and immunohistochemistry. The survival rate of STSG was assessed by planimetry. After 21 days, the density of microvascular and lymphatic networks was significantly higher in prevascularized matrices when compared to controls. This was associated with an improved implant integration. Moreover, prevascularization with ad-MVF allowed successful autologous skin grafting already at day 10, while coverage of non-seeded controls at day 10 resulted in STSG necrosis. In conclusion, ad-MVF represent powerful vascularization units. Seeded on dermal substitutes, they accelerate and enhance the healing of full-thickness skin defects and allow early coverage with STSG.
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442
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Ma S, Mukherjee N. Microfluidics Fabrication of Soft Microtissues and Bottom-Up Assembly. ACTA ACUST UNITED AC 2018. [DOI: 10.1002/adbi.201800119] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Shaohua Ma
- Tsinghua-Berkeley Shenzhen Institute; Tsinghua University; Shenzhen China
| | - Nobina Mukherjee
- Department of Chemistry; University of Oxford; OX1 3TA Oxford UK
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443
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Oliveira MB, Bastos HXS, Mano JF. Sequentially Moldable and Bondable Four-Dimensional Hydrogels Compatible with Cell Encapsulation. Biomacromolecules 2018; 19:2742-2749. [PMID: 29698598 PMCID: PMC6450509 DOI: 10.1021/acs.biomac.8b00337] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Hydrogels have captivated the attention of several research and industry segments, including bioengineering, tissue engineering, implantable/wearable sensors and actuators, bioactive agent delivery, food processing, and industrial processes optimization. A common limitation of these systems is their fixed shape. The concept of hydrogel moldability is often assigned to the injectability potential of liquid precursors, and this feature is often lost right after hydrogel formation. Hydrogel modulation is a recent trend that advocates the importance of designing materials with shape fitting ability targeting on-demand responses or defect filling purposes. Here, we present a compliant and cell encapsulation-compatible hydrogel prepared from unmodified natural origin polymers with the ability to undergo extreme sequential shape alterations with high recovery of its mechanical properties. Different fragments of these hydrogels could be bonded together in spatiotemporally controlled shape- and formulation-morphing structures. This material is prepared with affordable off-the-shelf polysaccharides of natural origin using a mild and safe processing strategy based solely on polyelectrolyte complexation followed by an innovative partial coacervate compaction and dehydration step. These unique hydrogels hold potential for multifield industrial and healthcare applications. In particular, they may find application as defect filling agents or highly compliant wound healing patches for cargo release and/or cell delivery for tissue regeneration and cell-based therapies.
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Affiliation(s)
- Mariana B. Oliveira
- Department of Chemistry, CICECO – Aveiro Institute of Materials. University of Aveiro. 3810-193 Aveiro, Portugal
| | - Henrique X. S. Bastos
- Department of Chemistry, CICECO – Aveiro Institute of Materials. University of Aveiro. 3810-193 Aveiro, Portugal
| | - João F. Mano
- Department of Chemistry, CICECO – Aveiro Institute of Materials. University of Aveiro. 3810-193 Aveiro, Portugal
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444
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Jansen LE, Amer LD, Chen EYT, Nguyen TV, Saleh LS, Emrick T, Liu WF, Bryant SJ, Peyton SR. Zwitterionic PEG-PC Hydrogels Modulate the Foreign Body Response in a Modulus-Dependent Manner. Biomacromolecules 2018; 19:2880-2888. [PMID: 29698603 PMCID: PMC6190668 DOI: 10.1021/acs.biomac.8b00444] [Citation(s) in RCA: 65] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Reducing the foreign body response (FBR) to implanted biomaterials will enhance their performance in tissue engineering. Poly(ethylene glycol) (PEG) hydrogels are increasingly popular for this application due to their low cost, ease of use, and the ability to tune their compliance via molecular weight and cross-linking densities. PEG hydrogels can elicit chronic inflammation in vivo, but recent evidence has suggested that extremely hydrophilic, zwitterionic materials and particles can evade the immune system. To combine the advantages of PEG-based hydrogels with the hydrophilicity of zwitterions, we synthesized hydrogels with comonomers PEG and the zwitterion phosphorylcholine (PC). Recent evidence suggests that stiff hydrogels elicit increased immune cell adhesion to hydrogels, which we attempted to reduce by increasing hydrogel hydrophilicity. Surprisingly, hydrogels with the highest amount of zwitterionic comonomer elicited the highest FBR. Lowering the hydrogel modulus (165 to 3 kPa), or PC content (20 to 0 wt %), mitigated this effect. A high density of macrophages was found at the surface of implants associated with a high FBR, and mass spectrometry analysis of the proteins adsorbed to these gels implicated extracellular matrix, immune response, and cell adhesion protein categories as drivers of macrophage recruitment. Overall, we show that modulus regulates macrophage adhesion to zwitterionic-PEG hydrogels, and demonstrate that chemical modifications to hydrogels should be studied in parallel with their physical properties to optimize implant design.
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Affiliation(s)
| | - Luke D Amer
- Department of Chemical and Biological Engineering , University of Colorado Boulder , Boulder , Colorado 80309 , United States
| | - Esther Y-T Chen
- Department of Biomedical Engineering , University of California, Irvine , Irvine , California 92697 , United States
| | | | - Leila S Saleh
- Department of Chemical and Biological Engineering , University of Colorado Boulder , Boulder , Colorado 80309 , United States
| | | | - Wendy F Liu
- Department of Biomedical Engineering , University of California, Irvine , Irvine , California 92697 , United States
| | - Stephanie J Bryant
- Department of Chemical and Biological Engineering , University of Colorado Boulder , Boulder , Colorado 80309 , United States
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445
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Sun G, Shen YI, Harmon JW. Engineering Pro-Regenerative Hydrogels for Scarless Wound Healing. Adv Healthc Mater 2018; 7:e1800016. [PMID: 29663707 DOI: 10.1002/adhm.201800016] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2018] [Revised: 02/17/2018] [Indexed: 12/21/2022]
Abstract
Skin and skin appendages protect the body from harmful environment and prevent internal organs from dehydration. Superficial epidermal wounds usually heal without scarring, however, deep dermal wound healing commonly ends up with nonfunctioning scar formation with substantial loss of skin appendage. Wound healing is one of the most complex dynamic biological processes, during which a cascade of biomolecules combine with stem cell influx and matrix synthesis and synergistically contribute to wound healing at all levels. Although many approaches have been investigated to restore complete skin, the clinically effective therapy is still unavailable and the regeneration of perfect skin still remains a significant challenge. The complete mechanism behind scarless skin regeneration still requires further investigation. Fortunately, recent advancement in regenerative medicine empowers us more than ever to restore tissue in a regenerative manner. Many studies have elucidated and reviewed the contribution of stem cells and growth factors to scarless wound healing. This article focuses on recent advances in scarless wound healing, especially strategies to engineer pro-regenerative scaffolds to restore damaged skin in a regenerative manner.
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Affiliation(s)
- Guoming Sun
- Sunogel Biotechnologies Inc.; 9 W Ridgely Road Ste 270 Lutherville Timonium MD 21093 USA
| | - Yu-I Shen
- Sunogel Biotechnologies Inc.; 9 W Ridgely Road Ste 270 Lutherville Timonium MD 21093 USA
| | - John W. Harmon
- Department of Surgery and the Hendrix Burn Lab; Johns Hopkins University School of Medicine; Baltimore MD 21224 USA
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446
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Abstract
Stem cells are a powerful resource for many applications including regenerative medicine, patient-specific disease modeling, and toxicology screening. However, eliciting the desired behavior from stem cells, such as expansion in a naïve state or differentiation into a particular mature lineage, remains challenging. Drawing inspiration from the native stem cell niche, hydrogel platforms have been developed to regulate stem cell fate by controlling microenvironmental parameters including matrix mechanics, degradability, cell-adhesive ligand presentation, local microstructure, and cell-cell interactions. We survey techniques for modulating hydrogel properties and review the effects of microenvironmental parameters on maintaining stemness and controlling differentiation for a variety of stem cell types. Looking forward, we envision future hydrogel designs spanning a spectrum of complexity, ranging from simple, fully defined materials for industrial expansion of stem cells to complex, biomimetic systems for organotypic cell culture models.
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Affiliation(s)
- Christopher M Madl
- Department of Bioengineering, Stanford University, Stanford, California 94305, USA
| | - Sarah C Heilshorn
- Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, USA;
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447
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Xin S, Wyman OM, Alge DL. Assembly of PEG Microgels into Porous Cell-Instructive 3D Scaffolds via Thiol-Ene Click Chemistry. Adv Healthc Mater 2018; 7:e1800160. [PMID: 29663702 PMCID: PMC6262827 DOI: 10.1002/adhm.201800160] [Citation(s) in RCA: 78] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2018] [Indexed: 11/07/2022]
Abstract
The assembly of microgel building blocks into 3D scaffolds is an emerging strategy for tissue engineering. A key advantage is that the inherent microporosity of these scaffolds provides cells with a more permissive environment than conventional nanoporous hydrogels. Here, norbornene-bearing poly(ethylene glycol) (PEG) based microgels are assembled into 3D cell-instructive scaffolds using a PEG-dithiol linker and thiol-ene click photopolymerization. The bulk modulus of these materials depends primarily on the crosslink density of the microgel building blocks. However, the linker and initiator concentrations used during assembly have significant effects on cell spreading and proliferation when human mesenchymal stem cells (hMSCs) are incorporated in the scaffolds. The cell response is also affected by the properties of the modular microgel building blocks, as hMSCs growing in scaffolds assembled from stiff but not soft microgels activate Yes-associated protein signaling. These results indicate that PEG microgel scaffolds assembled via thiol-ene click chemistry can be engineered to provide a cell-instructive 3D milieu, making them a promising 3D platform for tissue engineering.
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Affiliation(s)
- Shangjing Xin
- Department of Biomedical Engineering, Texas A&M University, College Station, TX, 77843, USA
| | - Omar M Wyman
- Department of Biomedical Engineering, Texas A&M University, College Station, TX, 77843, USA
| | - Daniel L Alge
- Department of Biomedical Engineering, Texas A&M University, College Station, TX, 77843, USA
- Department of Materials Science and Engineering, Texas A&M University, College Station, TX, 77843, USA
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448
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Zhu Y, Hideyoshi S, Jiang H, Matsumura Y, Dziki JL, LoPresti ST, Huleihel L, Faria GNF, Fuhrman LC, Lodono R, Badylak SF, Wagner WR. Injectable, porous, biohybrid hydrogels incorporating decellularized tissue components for soft tissue applications. Acta Biomater 2018; 73:112-126. [PMID: 29649634 PMCID: PMC5985206 DOI: 10.1016/j.actbio.2018.04.003] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Revised: 03/07/2018] [Accepted: 04/02/2018] [Indexed: 12/16/2022]
Abstract
Biodegradable injectable hydrogels have been extensively studied and evaluated in various medical applications such as for bulking agents, drug delivery reservoirs, temporary barriers, adhesives, and cell delivery matrices. Where injectable hydrogels are intended to facilitate a healing response, it may be desirable to encourage rapid cellular infiltration into the hydrogel volume from the tissue surrounding the injection site. In this study, we developed a platform technique to rapidly form pores in a thermally responsive injectable hydrogel, poly(NIPAAm-co-VP-co-MAPLA) by using mannitol particles as porogens. In a rat hindlimb muscle injection model, hydrogels incorporating porosity had significantly accelerated cellular infiltration. To influence the inflammatory response to the injected hydrogel, enzymatically digested urinary bladder matrix (UBM) was mixed with the solubilized hydrogel. The presence of UBM was associated with greater polarization of the recruited macrophage population to the M2 phenotype, indicating a more constructive foreign body response. The hybrid hydrogel positively affected the wound healing outcomes of defects in rabbit adipose tissue with negligible inflammation and fibrosis, whereas scar formation and chronic inflammation were observed with autotransplantation and in saline injected groups. These results demonstrate the value of combining the effects of promoting cell infiltration and mediating the foreign body response for improved biomaterials options soft tissue defect filling applications. STATEMENT OF SIGNIFICANCE Our objective was to develop a fabrication process to create porous injectable hydrogels incorporating decellularized tissue digest material. This new hydrogel material was expected to exhibit faster cellular infiltration and a greater extent of pro-M2 macrophage polarization compared to control groups not incorporating each of the functional components. Poly(NIPAAm-co-VP-co-MAPLA) was chosen as the representative thermoresponsive hydrogel, and mannitol particles and digested urinary bladder matrix (UBM) were selected as the porogen and the bioactive decellularized material components respectively. In rat hindlimb intramuscular injection models, this new hydrogel material induced more rapid cellular infiltration and a greater extent of M2 macrophage polarization compared to control groups not incorporating all of the functional components. The hybrid hydrogel positively affected the wound healing outcomes of defects in rabbit adipose tissue with negligible inflammation and fibrosis, whereas scar formation and chronic inflammation were observed with autotransplantation and in saline injected groups. The methodology of this report provides a straightforward and convenient mechanism to promote cell infiltration and mediate foreign body response in injectable hydrogels for soft tissue applications. We believe that the readership of Acta Biomaterialia will find the work of interest both for its specific results and general translatability of the findings.
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Affiliation(s)
- Yang Zhu
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA 15219, USA; Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA 15219, USA
| | - Sato Hideyoshi
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA 15219, USA
| | - Hongbin Jiang
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA 15219, USA
| | - Yasumoto Matsumura
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA 15219, USA
| | - Jenna L Dziki
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA 15219, USA; Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA 15219, USA
| | - Samuel T LoPresti
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA 15219, USA; Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA 15219, USA
| | - Luai Huleihel
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA 15219, USA; Department of Surgery, University of Pittsburgh, Pittsburgh, PA 15219, USA
| | - Gabriela N F Faria
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA 15219, USA
| | - Leah C Fuhrman
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA 15219, USA
| | - Ricardo Lodono
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA 15219, USA
| | - Stephen F Badylak
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA 15219, USA; Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA 15219, USA; Department of Surgery, University of Pittsburgh, Pittsburgh, PA 15219, USA
| | - William R Wagner
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA 15219, USA; Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA 15219, USA; Department of Surgery, University of Pittsburgh, Pittsburgh, PA 15219, USA; Department of Chemical Engineering, University of Pittsburgh, Pittsburgh, PA 15219, USA.
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449
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Zheng Y, Liang Y, Zhang D, Sun X, Liang L, Li J, Liu YN. Gelatin-Based Hydrogels Blended with Gellan as an Injectable Wound Dressing. ACS OMEGA 2018; 3:4766-4775. [PMID: 30023901 PMCID: PMC6044880 DOI: 10.1021/acsomega.8b00308] [Citation(s) in RCA: 131] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Accepted: 04/20/2018] [Indexed: 05/21/2023]
Abstract
Injectable scaffolds are of great interests for skin regeneration because they can fill irregularly shaped defects through minimally invasive surgical treatments. In this study, an injectable hydrogel from biopolymers is developed and its application as wound dressings is examined. Gelatin-based hydrogels were successfully prepared at body temperature upon blending with low content of gellan, and the synergetic effect on the gel formation was carefully characterized through rheological methods. The electrostatic complexation between gelatin and gellan was confirmed to contribute a continuous hydrogel network. The obtained blend hydrogel demonstrates remarkable shear-thinning and self-recovering properties. For antibacterial purpose, tannic acid was incorporated into the blend hydrogel. In addition, tannic acid-loaded blend hydrogel was verified to accelerate the wound healing on the mice model, significantly than the control groups. Thus, this paper presents a facile approach without chemical modification to construct injectable gelatin-based hydrogels, which have great potential as a wound dressing or tissue scaffold at body temperature.
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Affiliation(s)
- Yueyuan Zheng
- College
of Chemistry and Chemical Engineering, Central
South University, Changsha, Hunan 410083, P. R. China
| | - Yuqing Liang
- College
of Chemistry and Chemical Engineering, Central
South University, Changsha, Hunan 410083, P. R. China
| | - Depan Zhang
- College
of Chemistry and Chemical Engineering, Central
South University, Changsha, Hunan 410083, P. R. China
| | - Xiaoyi Sun
- College
of Chemistry and Chemical Engineering, Central
South University, Changsha, Hunan 410083, P. R. China
| | - Li Liang
- State
Key Laboratory of Food Science and Technology, School of Food Science
and Technology, Jiangnan University, Wuxi, Jiangsu 214122, P. R. China
| | - Juan Li
- College
of Chemistry and Chemical Engineering, Central
South University, Changsha, Hunan 410083, P. R. China
| | - You-Nian Liu
- College
of Chemistry and Chemical Engineering, Central
South University, Changsha, Hunan 410083, P. R. China
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450
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Hakimi N, Cheng R, Leng L, Sotoudehfar M, Ba PQ, Bakhtyar N, Amini-Nik S, Jeschke MG, Günther A. Handheld skin printer: in situ formation of planar biomaterials and tissues. LAB ON A CHIP 2018; 18:1440-1451. [PMID: 29662977 PMCID: PMC5965293 DOI: 10.1039/c7lc01236e] [Citation(s) in RCA: 121] [Impact Index Per Article: 20.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
We present a handheld skin printer that enables the in situ formation of biomaterial and skin tissue sheets of different homogeneous and architected compositions. When manually positioned above a target surface, the compact instrument (weight <0.8 kg) conformally deposits a biomaterial or tissue sheet from a microfluidic cartridge. Consistent sheet formation is achieved by coordinating the flow rates at which bioink and cross-linker solution are delivered, with the speed at which a pair of rollers actively translate the cartridge along the surface. We demonstrate compatibility with dermal and epidermal cells embedded in ionically cross-linkable biomaterials (e.g., alginate), and enzymatically cross-linkable proteins (e.g., fibrin), as well as their mixtures with collagen type I and hyaluronic acid. Upon rapid crosslinking, biomaterial and skin cell-laden sheets of consistent thickness, width and composition were obtained. Sheets deposited onto horizontal, agarose-coated surfaces were used for physical and in vitro characterization. Proof-of-principle demonstrations for the in situ formation of biomaterial sheets in murine and porcine excisional wound models illustrate the capacity of depositing onto inclined and compliant wound surfaces that are subject to respiratory motion. We expect the presented work will enable the in situ delivery of a wide range of different cells, biomaterials, and tissue adhesives, as well as the in situ fabrication of spatially organized biomaterials, tissues, and biohybrid structures.
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Affiliation(s)
- Navid Hakimi
- Department of Mechanical and Industrial Engineering, University of Toronto 5 King’s College Road, Toronto, Ontario M5S3G8, Canada
| | - Richard Cheng
- Institute of Biomaterials and Biomedical Engineering, University of Toronto 164 College Street, Toronto, Ontario M5S 3G9, Canada
| | - Lian Leng
- Department of Mechanical and Industrial Engineering, University of Toronto 5 King’s College Road, Toronto, Ontario M5S3G8, Canada
| | - Mohammad Sotoudehfar
- Department of Mechanical and Industrial Engineering, University of Toronto 5 King’s College Road, Toronto, Ontario M5S3G8, Canada
| | - Phoenix Qing Ba
- Department of Mechanical and Industrial Engineering, University of Toronto 5 King’s College Road, Toronto, Ontario M5S3G8, Canada
| | - Nazihah Bakhtyar
- Ross Tilley Burn Centre, Sunnybrook Health Sciences Centre and Sunnybrook Research Institute, 2075 Bayview Ave, Room D704, Toronto, Ontario M4N 3M5, Canada
| | - Saeid Amini-Nik
- Department of Surgery, Department of Immunology, Division of Plastic Surgery and General Surgery, University of Toronto, 149 College Street, Toronto, Ontario M5T 1P5, Canada
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Medical Sciences Building, 6th Floor, 1 King’s College Circle, Toronto, Ontario M5S 1A8, Canada
| | - Marc G. Jeschke
- Ross Tilley Burn Centre, Sunnybrook Health Sciences Centre and Sunnybrook Research Institute, 2075 Bayview Ave, Room D704, Toronto, Ontario M4N 3M5, Canada
- Department of Surgery, Department of Immunology, Division of Plastic Surgery and General Surgery, University of Toronto, 149 College Street, Toronto, Ontario M5T 1P5, Canada
- Institute of Medical Science, University of Toronto, 1 King’s College Circle, Room 2374, Toronto, Ontario M5S 1A8, Canada
| | - Axel Günther
- Department of Mechanical and Industrial Engineering, University of Toronto 5 King’s College Road, Toronto, Ontario M5S3G8, Canada
- Institute of Biomaterials and Biomedical Engineering, University of Toronto 164 College Street, Toronto, Ontario M5S 3G9, Canada
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