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Collagen Alignment via Electro-Compaction for Biofabrication Applications: A Review. Polymers (Basel) 2022; 14:polym14204270. [PMID: 36297848 PMCID: PMC9609630 DOI: 10.3390/polym14204270] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Revised: 10/05/2022] [Accepted: 10/05/2022] [Indexed: 11/24/2022] Open
Abstract
As the most prevalent structural protein in the extracellular matrix, collagen has been extensively investigated for biofabrication-based applications. However, its utilisation has been impeded due to a lack of sufficient mechanical toughness and the inability of the scaffold to mimic complex natural tissues. The anisotropic alignment of collagen fibres has been proven to be an effective method to enhance its overall mechanical properties and produce biomimetic scaffolds. This review introduces the complicated scenario of collagen structure, fibril arrangement, type, function, and in addition, distribution within the body for the enhancement of collagen-based scaffolds. We describe and compare existing approaches for the alignment of collagen with a sharper focus on electro-compaction. Additionally, various effective processes to further enhance electro-compacted collagen, such as crosslinking, the addition of filler materials, and post-alignment fabrication techniques, are discussed. Finally, current challenges and future directions for the electro-compaction of collagen are presented, providing guidance for the further development of collagenous scaffolds for bioengineering and nanotechnology.
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Ashoorirad M, Fallah A, Saviz M. Measuring and assessment of impedance spectrum of collagen thin films in the presence of deionized water. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.114488] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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3
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Biomimetic corneal stroma using electro-compacted collagen. Acta Biomater 2020; 113:360-371. [PMID: 32652228 DOI: 10.1016/j.actbio.2020.07.004] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Revised: 07/01/2020] [Accepted: 07/02/2020] [Indexed: 12/14/2022]
Abstract
Engineering substantia propria (or stroma of cornea) that mimics the function and anatomy of natural tissue is vital for in vitro modelling and in vivo regeneration. There are, however, few examples of bioengineered biomimetic corneal stroma. Here we describe the construction of an orthogonally oriented 3D corneal stroma model (3D-CSM) using pure electro-compacted collagen (EC). EC films comprise aligned collagen fibrils and support primary human corneal stromal cells (hCSCs). Cell-laden constructs are analogous to the anatomical structure of native human cornea. The hCSCs are guided by the topographical cues provided by the aligned collagen fibrils of the EC films. Importantly, the 3D-CSM are biodegradable, highly transparent, glucose-permeable and comprise quiescent hCSCs. Gene expression analysis indicated the presence of aligned collagen fibrils is strongly coupled to downregulation of active fibroblast/myofibroblast markers α-SMA and Thy-1, with a concomitant upregulation of the dormant keratocyte marker ALDH3. The 3D-CSM represents the first example of an optimally robust biomimetic engineered corneal stroma that is constructed from pure electro-compacted collagen for cell and tissue support. The 3D-CSM is a significant advance for synthetic corneal stroma engineering, with the potential to be used for full-thickness and functional cornea replacement, as well as informing in vivo tissue regeneration. STATEMENT OF SIGNIFICANCE: This manuscript represents the first example of a robust, transparent, glucose permeable and pure collagen-based biomimetic 3D corneal stromal model (3D-CSM) constructed from pure electro-compacted collagen. The collagen fibrils of 3D-CSM are aligned and orthogonally arranged, mimicking native human corneal stroma. The alignment of collagen fibrils correlates with the direction of current applied for electro-compaction and influences human corneal stromal cell (hCSC) orientation. Moreover, 3D-CSM constructs support a corneal keratocyte phenotype; an essential requirement for modelling healthy corneal stroma. As-prepared 3D-CSM hold great promise as corneal stromal substitutes for research and translation, with the potential to be used for full-thickness cornea replacement.
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On the electrical properties of collagen macromolecule solutions: Role of collagen-water interactions. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2019.112344] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Li J, Wu S, Kim E, Yan K, Liu H, Liu C, Dong H, Qu X, Shi X, Shen J, Bentley WE, Payne GF. Electrobiofabrication: electrically based fabrication with biologically derived materials. Biofabrication 2019; 11:032002. [PMID: 30759423 PMCID: PMC7025432 DOI: 10.1088/1758-5090/ab06ea] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
While conventional material fabrication methods focus on form and strength to achieve function, the fabrication of material systems for emerging life science applications will need to satisfy a more subtle set of requirements. A common goal for biofabrication is to recapitulate complex biological contexts (e.g. tissue) for applications that range from animal-on-a-chip to regenerative medicine. In these cases, the material systems will need to: (i) present appropriate surface functionalities over a hierarchy of length scales (e.g. molecular features that enable cell adhesion and topographical features that guide differentiation); (ii) provide a suite of mechanobiological cues that promote the emergence of native-like tissue form and function; and (iii) organize structure to control cellular ingress and molecular transport, to enable the development of an interconnected cellular community that is engaged in cell signaling. And these requirements are not likely to be static but will vary over time and space, which will require capabilities of the material systems to dynamically respond, adapt, heal and reconfigure. Here, we review recent advances in the use of electrically based fabrication methods to build material systems from biological macromolecules (e.g. chitosan, alginate, collagen and silk). Electrical signals are especially convenient for fabrication because they can be controllably imposed to promote the electrophoresis, alignment, self-assembly and functionalization of macromolecules to generate hierarchically organized material systems. Importantly, this electrically based fabrication with biologically derived materials (i.e. electrobiofabrication) is complementary to existing methods (photolithographic and printing), and enables access to the biotechnology toolbox (e.g. enzymatic-assembly and protein engineering, and gene expression) to offer exquisite control of structure and function. We envision that electrobiofabrication will emerge as an important platform technology for organizing soft matter into dynamic material systems that mimic biology's complexity of structure and versatility of function.
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Affiliation(s)
- Jinyang Li
- Institute for Bioscience and Biotechnology Research, University of Maryland, College Park, United States of America
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Ahmad R, Paradis H, Boyce D, McDonald J, Gendron RL. Novel characteristics of the cultured Lumpfish Cyclopterus lumpus eye during post-hatch larval and juvenile developmental stages. JOURNAL OF FISH BIOLOGY 2019; 94:297-312. [PMID: 30565257 DOI: 10.1111/jfb.13892] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Accepted: 12/17/2018] [Indexed: 06/09/2023]
Abstract
We systematically analysed the characteristics of the Cyclopterus lumpus eye and retina during cultured post-hatch developmental stages using gross observations, histology, immunohistochemistry, microscopy, fundus imaging and spectral domain optical coherence tomography retinal imaging. Post-hatch developing cultured C. lumpus eye and retinal tissues share a number of features typically conserved in other teleost fish. However, cultured C. lumpus possess some novel ocular and retinal features different from previous descriptions of other teleosts, including a prominent retractor lentis pigmented tissue closely associated with the vascular rete mirabile, peripherally located lobes of separate retinal tissue containing proliferative cells, extensive tapetum material of varying thickness, prominent fundus stripes and an elongated rod-shaped optic nerve stalk. Post-hatch developing cultured C. lumpus also developmentally regulate a protein homologous to alpha smooth-muscle actin in strikingly dense continuous bands in the plexiform layers of the retina. The novel features of the eye and retina of cultured C. lumpus described here could contribute to our understanding of fitness and survival of C. lumpus in a widely ranging habitat.
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Affiliation(s)
- Raahyma Ahmad
- Division of Biomedical Science, Memorial University, St. John's, Newfoundland, Canada
| | - Helene Paradis
- Division of Biomedical Science, Memorial University, St. John's, Newfoundland, Canada
| | - Danny Boyce
- Department of Ocean Science, Memorial University, St. John's, Newfoundland, Canada
| | - James McDonald
- Faculty of Medicine, Memorial University, St. John's, Newfoundland, Canada
| | - Robert L Gendron
- Division of Biomedical Science, Memorial University, St. John's, Newfoundland, Canada
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Kishore V, Iyer R, Frandsen A, Nguyen TU. In vitro characterization of electrochemically compacted collagen matrices for corneal applications. ACTA ACUST UNITED AC 2016; 11:055008. [PMID: 27710923 DOI: 10.1088/1748-6041/11/5/055008] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Loss of vision due to corneal disease is a significant problem worldwide. Transplantation of donor corneas is a viable treatment option but limitations such as short supply and immune-related complications call for alternative options for the treatment of corneal disease. A tissue engineering-based approach using a collagen scaffold is a promising alternative to develop a bioengineered cornea that mimics the functionality of native cornea. In this study, an electrochemical compaction method was employed to synthesize highly dense and transparent collagen matrices. We hypothesized that chemical crosslinking of electrochemically compacted collagen (ECC) matrices will maintain transparency, improve stability, and enhance the mechanical properties of the matrices to the level of native cornea. Further, we hypothesized that keratocyte cell viability and proliferation will be maintained on crosslinked ECC matrices. The results indicated that uncrosslinked and 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide-N-hydroxysuccinimide (EDC-NHS) crosslinked ECC matrices were highly transparent with light transmission measurements comparable to native cornea. Stability tests showed that while the uncrosslinked ECC matrices degraded within 6 h when treated with collagenase, EDC-NHS or genipin crosslinking significantly improved the stability of ECC matrices (192 h for EDC-NHS and 256 h for genipin). Results from the mechanical tests showed that both EDC-NHS and genipin crosslinking significantly improved the strength and modulus of ECC matrices. Cell culture studies showed that keratocyte cell viability and proliferation are maintained on EDC-NHS crosslinked ECC matrices. Overall, results from this study suggest that ECC matrices have the potential to be developed as a functional biomaterial for corneal repair and regeneration.
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Affiliation(s)
- Vipuil Kishore
- Department of Chemical Engineering, Florida Institute of Technology, Melbourne, FL 32901, USA. Department of Biomedical Engineering, Florida Institute of Technology, Melbourne, FL 32901, USA. Author to whom any correspondence should be addressed. Department of Chemical Engineering, Florida Institute of Technology, 150 W. University Blvd, Melbourne, FL 32901, USA
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Kim E, Liu Y, Ben-Yoav H, Winkler TE, Yan K, Shi X, Shen J, Kelly DL, Ghodssi R, Bentley WE, Payne GF. Fusing Sensor Paradigms to Acquire Chemical Information: An Integrative Role for Smart Biopolymeric Hydrogels. Adv Healthc Mater 2016; 5:2595-2616. [PMID: 27616350 PMCID: PMC5485850 DOI: 10.1002/adhm.201600516] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2016] [Revised: 06/26/2016] [Indexed: 12/14/2022]
Abstract
The Information Age transformed our lives but it has had surprisingly little impact on the way chemical information (e.g., from our biological world) is acquired, analyzed and communicated. Sensor systems are poised to change this situation by providing rapid access to chemical information. This access will be enabled by technological advances from various fields: biology enables the synthesis, design and discovery of molecular recognition elements as well as the generation of cell-based signal processors; physics and chemistry are providing nano-components that facilitate the transmission and transduction of signals rich with chemical information; microfabrication is yielding sensors capable of receiving these signals through various modalities; and signal processing analysis enhances the extraction of chemical information. The authors contend that integral to the development of functional sensor systems will be materials that (i) enable the integrative and hierarchical assembly of various sensing components (for chemical recognition and signal transduction) and (ii) facilitate meaningful communication across modalities. It is suggested that stimuli-responsive self-assembling biopolymers can perform such integrative functions, and redox provides modality-spanning communication capabilities. Recent progress toward the development of electrochemical sensors to manage schizophrenia is used to illustrate the opportunities and challenges for enlisting sensors for chemical information processing.
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Affiliation(s)
- Eunkyoung Kim
- Institute for Biosystems and Biotechnology Research, University of Maryland, College Park, MD, 20742, USA
- Fischell Department of Bioengineering, University of Maryland, College Park, MD, 20742, USA
| | - Yi Liu
- Institute for Biosystems and Biotechnology Research, University of Maryland, College Park, MD, 20742, USA
- Fischell Department of Bioengineering, University of Maryland, College Park, MD, 20742, USA
| | - Hadar Ben-Yoav
- Department of Biomedical Engineering, Ben-Gurion University of the Negev, Beer Sheva, 8410501, Israel
| | - Thomas E Winkler
- Institute for Systems Research, University of Maryland, College Park, MD, 20742, USA
- Department of Electrical and Computer Engineering, University of Maryland, College Park, MD, 20742, USA
| | - Kun Yan
- School of Resource and Environmental Science, Hubei Biomass-Resource Chemistry Environmental Biotechnology Key Laboratory, Wuhan University, Wuhan, 430079, China
| | - Xiaowen Shi
- School of Resource and Environmental Science, Hubei Biomass-Resource Chemistry Environmental Biotechnology Key Laboratory, Wuhan University, Wuhan, 430079, China
| | - Jana Shen
- Department of Pharmaceutical Sciences, School of Pharmacy, University of Maryland, Baltimore, MD, 21201, USA
| | - Deanna L Kelly
- Maryland Psychiatric Research Center, University of Maryland School of Medicine, Baltimore, MD, 21228, USA
| | - Reza Ghodssi
- Institute for Systems Research, University of Maryland, College Park, MD, 20742, USA
- Department of Electrical and Computer Engineering, University of Maryland, College Park, MD, 20742, USA
| | - William E Bentley
- Institute for Biosystems and Biotechnology Research, University of Maryland, College Park, MD, 20742, USA
- Fischell Department of Bioengineering, University of Maryland, College Park, MD, 20742, USA
| | - Gregory F Payne
- Institute for Biosystems and Biotechnology Research, University of Maryland, College Park, MD, 20742, USA.
- Fischell Department of Bioengineering, University of Maryland, College Park, MD, 20742, USA.
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Bioactive fish collagen/polycaprolactone composite nanofibrous scaffolds fabricated by electrospinning for 3D cell culture. J Biotechnol 2015; 205:47-58. [DOI: 10.1016/j.jbiotec.2015.01.017] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2014] [Revised: 01/12/2015] [Accepted: 01/16/2015] [Indexed: 01/15/2023]
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10
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Kumar MR, Freund MS. Electrically conducting collagen and collagen–mineral composites for current stimulation. RSC Adv 2015. [DOI: 10.1039/c5ra07500a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Electrochemical aggregation of (a) collagen–PEDOT:PSS and (b) collagen–calcium phosphate–PEDOT:PSS.
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Multilayered textile coating based on a β-cyclodextrin polyelectrolyte for the controlled release of drugs. Carbohydr Polym 2013; 93:718-30. [DOI: 10.1016/j.carbpol.2012.12.055] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2012] [Revised: 12/14/2012] [Accepted: 12/19/2012] [Indexed: 12/30/2022]
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Nino-Fong R, McDuffee LA, Esparza Gonzalez BP, Kumar MR, Merschrod S. EF, Poduska KM. Scaffold Effects on Osteogenic Differentiation of Equine Mesenchymal Stem Cells: An In Vitro Comparative Study. Macromol Biosci 2013; 13:348-55. [DOI: 10.1002/mabi.201200355] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2012] [Revised: 11/14/2012] [Indexed: 11/10/2022]
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Alfredo Uquillas J, Kishore V, Akkus O. Genipin crosslinking elevates the strength of electrochemically aligned collagen to the level of tendons. J Mech Behav Biomed Mater 2012; 15:176-89. [PMID: 23032437 DOI: 10.1016/j.jmbbm.2012.06.012] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2012] [Revised: 06/21/2012] [Accepted: 06/22/2012] [Indexed: 01/02/2023]
Abstract
Collagen-based tissue mimics are important in clinical research because collagen is the main structural element in tendons. The current study aimed to improve the mechanical strength of Electronically Aligned Collagen (ELAC) threads by optimizing several crosslinking parameters. The results indicated that elevating the concentration of genipin to 2% and the solvent to 90% ethanol significantly enhanced the wet ultimate tensile stress of ELAC threads to 109 MPa with a crosslinking degree of 65%. Furthermore, significantly higher adhesion and proliferation of hMSCs was observed in ELAC threads crosslinked with 2% genipin in 90% ethanol compared to 0.625% genipin in 1X PBS. In conclusion, ELAC threads with mechanical strength on par with native tendon have significant potential to be used as scaffolds in tendon tissue engineering applications.
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Affiliation(s)
- Jorge Alfredo Uquillas
- Weldon School of Biomedical Engineering, Purdue University, 206 S. Martin Jischke Drive, West Lafayette, IN 47907-2032, United States of America.
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