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Mazy D, Jafari A, Savoji H, Nault ML. Advances in bioadhesives for meniscal repair: A comprehensive review and criteria for the ideal candidate. J Orthop 2024; 56:82-86. [PMID: 38800588 PMCID: PMC11127183 DOI: 10.1016/j.jor.2024.05.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/29/2024] [Accepted: 05/12/2024] [Indexed: 05/29/2024] Open
Abstract
The latest studies agree that meniscal tears that require surgery should be repaired whenever possible to avoid early-onset osteoarthritis secondary to meniscectomy. Unfortunately, there are several limitations associated with meniscal sutures, making it difficult to put into practice the theory behind the concept of saving the meniscus. Meanwhile, there is an exponential growth in the use of tissue adhesives for surgery, but finding one suited to meniscal repair remains a struggle. This review has two main goals (1) to compile the various bioadhesives used in this field and (2) to list the criteria for an ideal meniscal bioadhesive. The review was conducted in PubMed, Google Scholar, and Web of Science in November 2023 without date restrictions. The inclusion criteria were: Studies published in English and focusing on meniscal repair using bioadhesives. The exclusion criteria were: Studies published in languages other than English. Adhesives used in combination with sutures, as the aim was to determine the adhesive's capabilities for meniscal repair alone. Synthetic adhesives such as polycyanoacrylates, polyethylene glycol, polyurethanes, and polyesters. Among the 11 bioadhesives found, fibrin is the only one that has been studied in humans. There are advantages and disadvantages to all the bioadhesives identified but none that fully meet the requirements for meniscal repair. The anatomy of meniscal tissue is complex and poses unique challenges that are compounded by arthroscopic stresses. The future of meniscal repair probably lies in combining the advantages of several bioadhesives, and this area should be the focus of future research.
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Affiliation(s)
- David Mazy
- University of Montreal, 2900 Boul. Edouard-Montpetit, Montréal, QC, H3T 1J4, Canada
- CHU Sainte-Justine, 3175 Chemin de La Côte-Sainte-Catherine, Montréal, QC H3T 1C5, Canada
| | - Arman Jafari
- Institute of Biomedical Engineering, Department of Pharmacology and Physiology, Faculty of Medicine, University of Montreal, Montreal, QC, H3T 1J4, Canada
- Azrieli Research Center CHU Sainte-Justine, Sainte-Justine University Hospital, Montreal, QC, H3T 1C5, Canada
- Montreal TransMedTech Institute, 2900 Boul. Édouard-Montpetit Montreal, QC, H3T 1J4, Canada
| | - Houman Savoji
- Institute of Biomedical Engineering, Department of Pharmacology and Physiology, Faculty of Medicine, University of Montreal, Montreal, QC, H3T 1J4, Canada
- Azrieli Research Center CHU Sainte-Justine, Sainte-Justine University Hospital, Montreal, QC, H3T 1C5, Canada
- Montreal TransMedTech Institute, 2900 Boul. Édouard-Montpetit Montreal, QC, H3T 1J4, Canada
| | - Marie-Lyne Nault
- University of Montreal, 2900 Boul. Edouard-Montpetit, Montréal, QC, H3T 1J4, Canada
- CHU Sainte-Justine, 3175 Chemin de La Côte-Sainte-Catherine, Montréal, QC H3T 1C5, Canada
- CIUSSS Hôpital Du Sacré-Coeur de Montréal (HSCM), Department of Orthopedic Surgery, 5400 Boul. Gouin Ouest, Montreal, QC, H4J 1C5, Canada
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Das S, Jegadeesan JT, Basu B. Gelatin Methacryloyl (GelMA)-Based Biomaterial Inks: Process Science for 3D/4D Printing and Current Status. Biomacromolecules 2024; 25:2156-2221. [PMID: 38507816 DOI: 10.1021/acs.biomac.3c01271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/22/2024]
Abstract
Tissue engineering for injured tissue replacement and regeneration has been a subject of investigation over the last 30 years, and there has been considerable interest in using additive manufacturing to achieve these goals. Despite such efforts, many key questions remain unanswered, particularly in the area of biomaterial selection for these applications as well as quantitative understanding of the process science. The strategic utilization of biological macromolecules provides a versatile approach to meet diverse requirements in 3D printing, such as printability, buildability, and biocompatibility. These molecules play a pivotal role in both physical and chemical cross-linking processes throughout the biofabrication, contributing significantly to the overall success of the 3D printing process. Among the several bioprintable materials, gelatin methacryloyl (GelMA) has been widely utilized for diverse tissue engineering applications, with some degree of success. In this context, this review will discuss the key bioengineering approaches to identify the gelation and cross-linking strategies that are appropriate to control the rheology, printability, and buildability of biomaterial inks. This review will focus on the GelMA as the structural (scaffold) biomaterial for different tissues and as a potential carrier vehicle for the transport of living cells as well as their maintenance and viability in the physiological system. Recognizing the importance of printability toward shape fidelity and biophysical properties, a major focus in this review has been to discuss the qualitative and quantitative impact of the key factors, including microrheological, viscoelastic, gelation, shear thinning properties of biomaterial inks, and printing parameters, in particular, reference to 3D extrusion printing of GelMA-based biomaterial inks. Specifically, we emphasize the different possibilities to regulate mechanical, swelling, biodegradation, and cellular functionalities of GelMA-based bio(material) inks, by hybridization techniques, including different synthetic and natural biopolymers, inorganic nanofillers, and microcarriers. At the close, the potential possibility of the integration of experimental data sets and artificial intelligence/machine learning approaches is emphasized to predict the printability, shape fidelity, or biophysical properties of GelMA bio(material) inks for clinically relevant tissues.
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Affiliation(s)
- Soumitra Das
- Materials Research Centre, Indian Institute of Science, Bangalore, India 560012
| | | | - Bikramjit Basu
- Materials Research Centre, Indian Institute of Science, Bangalore, India 560012
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Bandyopadhyay A, Ghibhela B, Mandal BB. Current advances in engineering meniscal tissues: insights into 3D printing, injectable hydrogels and physical stimulation based strategies. Biofabrication 2024; 16:022006. [PMID: 38277686 DOI: 10.1088/1758-5090/ad22f0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Accepted: 01/26/2024] [Indexed: 01/28/2024]
Abstract
The knee meniscus is the cushioning fibro-cartilage tissue present in between the femoral condyles and tibial plateau of the knee joint. It is largely avascular in nature and suffers from a wide range of tears and injuries caused by accidents, trauma, active lifestyle of the populace and old age of individuals. Healing of the meniscus is especially difficult due to its avascularity and hence requires invasive arthroscopic approaches such as surgical resection, suturing or implantation. Though various tissue engineering approaches are proposed for the treatment of meniscus tears, three-dimensional (3D) printing/bioprinting, injectable hydrogels and physical stimulation involving modalities are gaining forefront in the past decade. A plethora of new printing approaches such as direct light photopolymerization and volumetric printing, injectable biomaterials loaded with growth factors and physical stimulation such as low-intensity ultrasound approaches are being added to the treatment portfolio along with the contemporary tear mitigation measures. This review discusses on the necessary design considerations, approaches for 3D modeling and design practices for meniscal tear treatments within the scope of tissue engineering and regeneration. Also, the suitable materials, cell sources, growth factors, fixation and lubrication strategies, mechanical stimulation approaches, 3D printing strategies and injectable hydrogels for meniscal tear management have been elaborated. We have also summarized potential technologies and the potential framework that could be the herald of the future of meniscus tissue engineering and repair approaches.
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Affiliation(s)
- Ashutosh Bandyopadhyay
- Biomaterials and Tissue Engineering Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, Assam, 781039, India
| | - Baishali Ghibhela
- Biomaterials and Tissue Engineering Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, Assam, 781039, India
| | - Biman B Mandal
- Biomaterials and Tissue Engineering Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, Assam, 781039, India
- Centre for Nanotechnology, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
- Jyoti and Bhupat Mehta School of Health Sciences and Technology, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
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Zhou Z, Wang J, Jiang C, Xu K, Xu T, Yu X, Fang J, Yang Y, Dai X. Advances in Hydrogels for Meniscus Tissue Engineering: A Focus on Biomaterials, Crosslinking, Therapeutic Additives. Gels 2024; 10:114. [PMID: 38391445 PMCID: PMC10887778 DOI: 10.3390/gels10020114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2024] [Revised: 01/23/2024] [Accepted: 01/26/2024] [Indexed: 02/24/2024] Open
Abstract
Meniscus tissue engineering (MTE) has emerged as a promising strategy for meniscus repair and regeneration. As versatile platforms, hydrogels have gained significant attention in this field, as they possess tunable properties that allow them to mimic native extracellular matrices and provide a suitable microenvironment. Additionally, hydrogels can be minimally invasively injected and can be adjusted to match the shape of the implant site. They can conveniently and effectively deliver bioactive additives and demonstrate good compatibility with other functional materials. These inherent qualities have made hydrogel a promising candidate for therapeutic approaches in meniscus repair and regeneration. This article provides a comprehensive review of the advancements made in the research on hydrogel application for meniscus tissue engineering. Firstly, the biomaterials and crosslinking strategies used in the formation of hydrogels are summarized and analyzed. Subsequently, the role of therapeutic additives, including cells, growth factors, and other active products, in facilitating meniscus repair and regeneration is thoroughly discussed. Furthermore, we summarize the key issues for designing hydrogels used in MTE. Finally, we conclude with the current challenges encountered by hydrogel applications and suggest potential solutions for addressing these challenges in the field of MTE. We hope this review provides a resource for researchers and practitioners interested in this field, thereby facilitating the exploration of new design possibilities.
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Affiliation(s)
- Zhuxing Zhou
- Department of Orthopedic Surgery, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310000, China
- Orthopedics Research Institute of Zhejiang University, Hangzhou 310000, China
- Key Laboratory of Motor System Disease Research and Precision Therapy of Zhejiang Province, Hangzhou 310000, China
- Clinical Research Center of Motor System Disease of Zhejiang Province, Hangzhou 310000, China
| | - Jiajie Wang
- Department of Orthopedic Surgery, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310000, China
- Orthopedics Research Institute of Zhejiang University, Hangzhou 310000, China
- Key Laboratory of Motor System Disease Research and Precision Therapy of Zhejiang Province, Hangzhou 310000, China
- Clinical Research Center of Motor System Disease of Zhejiang Province, Hangzhou 310000, China
| | - Chaoqian Jiang
- School of Materials and Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Kaiwang Xu
- Department of Orthopedic Surgery, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310000, China
- Orthopedics Research Institute of Zhejiang University, Hangzhou 310000, China
- Key Laboratory of Motor System Disease Research and Precision Therapy of Zhejiang Province, Hangzhou 310000, China
- Clinical Research Center of Motor System Disease of Zhejiang Province, Hangzhou 310000, China
| | - Tengjing Xu
- Department of Orthopedic Surgery, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310000, China
- Orthopedics Research Institute of Zhejiang University, Hangzhou 310000, China
- Key Laboratory of Motor System Disease Research and Precision Therapy of Zhejiang Province, Hangzhou 310000, China
- Clinical Research Center of Motor System Disease of Zhejiang Province, Hangzhou 310000, China
| | - Xinning Yu
- Department of Orthopedic Surgery, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310000, China
- Orthopedics Research Institute of Zhejiang University, Hangzhou 310000, China
- Key Laboratory of Motor System Disease Research and Precision Therapy of Zhejiang Province, Hangzhou 310000, China
- Clinical Research Center of Motor System Disease of Zhejiang Province, Hangzhou 310000, China
| | - Jinghua Fang
- Department of Orthopedic Surgery, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310000, China
- Orthopedics Research Institute of Zhejiang University, Hangzhou 310000, China
- Key Laboratory of Motor System Disease Research and Precision Therapy of Zhejiang Province, Hangzhou 310000, China
- Clinical Research Center of Motor System Disease of Zhejiang Province, Hangzhou 310000, China
| | - Yanyu Yang
- School of Materials and Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Xuesong Dai
- Department of Orthopedic Surgery, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310000, China
- Orthopedics Research Institute of Zhejiang University, Hangzhou 310000, China
- Key Laboratory of Motor System Disease Research and Precision Therapy of Zhejiang Province, Hangzhou 310000, China
- Clinical Research Center of Motor System Disease of Zhejiang Province, Hangzhou 310000, China
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Ghaedamini S, Karbasi S, Hashemibeni B, Honarvar A, Rabiei A. PCL/Agarose 3D-printed scaffold for tissue engineering applications: fabrication, characterization, and cellular activities. Res Pharm Sci 2023; 18:566-579. [PMID: 37842514 PMCID: PMC10568963 DOI: 10.4103/1735-5362.383711] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2023] [Revised: 05/10/2023] [Accepted: 07/15/2023] [Indexed: 10/17/2023] Open
Abstract
Background and purpose Biomaterials, scaffold manufacturing, and design strategies with acceptable mechanical properties are the most critical challenges facing tissue engineering. Experimental approach In this study, polycaprolactone (PCL) scaffolds were fabricated through a novel three-dimensional (3D) printing method. The PCL scaffolds were then coated with 2% agarose (Ag) hydrogel. The 3D-printed PCL and PCL/Ag scaffolds were characterized for their mechanical properties, porosity, hydrophilicity, and water absorption. The construction and morphology of the printed scaffolds were evaluated via Fourier-Transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The attachment and proliferation of L929 cells cultured on the scaffolds were investigated through MTT assay on the cell culture study upon the 1st, 3rd, and 7th days. Findings/Results The incorporation of Ag hydrogel with PCL insignificantly decreased the mechanical strength of the scaffold. The presence of Ag enhanced the hydrophilicity and water absorption of the scaffolds, which could positively influence their cell behavior compared to the PCL scaffolds. Regarding cell morphology, the cells on the PCL scaffolds had a more rounded shape and less cell spreading, representing poor cell attachment and cell-scaffold interaction due to the hydrophobic nature of PCL. Conversely, the cells on the PCL/Ag scaffolds were elongated with a spindle-shaped morphology indicating a positive cell-scaffold interaction. Conclusion and implications PCL/Ag scaffolds can be considered appropriate for tissue-engineering applications.
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Affiliation(s)
- Sho’leh Ghaedamini
- Department of Anatomical Sciences, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Saeed Karbasi
- Department of Biomaterials, Nanotechnology and Tissue Engineering, School of Advanced Technologies in Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Batool Hashemibeni
- Department of Anatomical Sciences, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Ali Honarvar
- Cellular and Molecular Research Center, Faculty of Medicine, Yasuj University of Medical Sciences, Yasuj, Iran
| | - Abbasali Rabiei
- Department of Anatomical Sciences, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
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6
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Schwartz G, Morejon A, Gracia J, Best TM, Jackson AR, Travascio F. Heterogeneity of dynamic shear properties of the meniscus: A comparison between tissue core and surface layers. J Orthop Res 2023; 41:1607-1617. [PMID: 36448086 PMCID: PMC10225479 DOI: 10.1002/jor.25495] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Revised: 11/18/2022] [Accepted: 11/28/2022] [Indexed: 12/05/2022]
Abstract
Damage to the meniscus has been associated with excessive shear loads. Aimed at elucidating meniscus pathophysiology, previous studies have investigated the shear properties of the meniscus fibrocartilaginous core. However, the meniscus is structurally inhomogeneous, with an external cartilaginous envelope (tibial and femoral surface layers) wrapping the tissue core. To date, little is known about the shear behavior of the surface layers. The objective of this study was to measure the dynamic shear properties of the surface layers and derive empirical relations with their composition. Specimens were harvested from tibial and femoral surface layers and core of porcine menisci (medial and lateral, n = 10 each). Frequency sweep tests yielded complex shear modulus (G*) and phase shifts (δ). Mechanical behavior of regions was described by a generalized Maxwell model. Correlations between shear moduli with water and glycosaminoglycans content of the tissue regions were investigated. The femoral surface had the lowest shear modulus, when compared to core and tibial regions. A 3-relaxation times Maxwell model satisfactorily interpreted the shear behavior of all tissue regions. Inhomogeneous tissue composition was also observed, with water content in the surface layers being higher when compared with tissue core. Water content negatively correlated with shear properties in all regions. The lower measured shear properties in the femoral layer may explain the higher prevalence of meniscal tears on the superior surface of the tissue. The heterogenous behavior of the tissue in shear provides insight into meniscus pathology and has important implications for efforts to tissue engineer replacement tissues.
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Affiliation(s)
- Gabi Schwartz
- Department of Biomedical Engineering, University of Miami, Coral Gables, FL
| | - Andy Morejon
- Department of Mechanical and Aerospace Engineering, University of Miami, Coral Gables, FL
| | - Julissa Gracia
- Department of Mechanical and Aerospace Engineering, University of Miami, Coral Gables, FL
| | - Thomas M. Best
- Department of Biomedical Engineering, University of Miami, Coral Gables, FL
- Department of Orthopaedic Surgery, University of Miami, Miami, FL
- UHealth Sports Medicine Institute, Coral Gables, FL
| | - Alicia R. Jackson
- Department of Biomedical Engineering, University of Miami, Coral Gables, FL
| | - Francesco Travascio
- Department of Mechanical and Aerospace Engineering, University of Miami, Coral Gables, FL
- Department of Orthopaedic Surgery, University of Miami, Miami, FL
- Max Biedermann Institute for Biomechanics at Mount Sinai Medical Center, Miami Beach, FL
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Barceló X, Eichholz KF, Gonçalves IF, Garcia O, Kelly DJ. Bioprinting of structurally organized meniscal tissue within anisotropic melt electrowritten scaffolds. Acta Biomater 2023; 158:216-227. [PMID: 36638941 DOI: 10.1016/j.actbio.2022.12.047] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Revised: 12/15/2022] [Accepted: 12/21/2022] [Indexed: 01/12/2023]
Abstract
The meniscus is characterised by an anisotropic collagen fibre network which is integral to its biomechanical functionality. The engineering of structurally organized meniscal grafts that mimic the anisotropy of the native tissue remains a significant challenge. In this study, inkjet bioprinting was used to deposit a cell-laden bioink into additively manufactured scaffolds of differing architectures to engineer fibrocartilage grafts with user defined collagen architectures. Polymeric scaffolds consisting of guiding fibre networks with varying aspect ratios (1:1; 1:4; 1:16) were produced using either fused deposition modelling (FDM) or melt electrowriting (MEW), resulting in scaffolds with different internal architectures and fibre diameters. Scaffold architecture was found to influence the spatial organization of the collagen network laid down by the jetted cells, with higher aspect ratios (1:4 and 1:16) supporting the formation of structurally anisotropic tissues. The MEW scaffolds supported the development of a fibrocartilaginous tissue with compressive mechanical properties similar to that of native meniscus, while the anisotropic tensile properties of these constructs could be tuned by altering the fibre network aspect ratio. This MEW framework was then used to generate scaffolds with spatially distinct fibre patterns, which in turn supported the development of heterogenous tissues consisting of isotropic and anisotropic collagen networks. Such bioprinted tissues could potentially form the basis of new treatment options for damaged and diseased meniscal tissue. STATEMENT OF SIGNIFICANCE: This study describes a multiple tool biofabrication strategy which enables the engineering of spatially organized fibrocartilage tissues. The architecture of MEW scaffolds can be tailored to not only modulate the directionality of the collagen fibres laid down by cells, but also to tune the anisotropic tensile mechanical properties of the resulting constructs, thereby enabling the engineering of biomimetic meniscal-like tissues. Furthermore, the inherent flexibility of MEW enables the development of zonally defined and potentially patient-specific implants.
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Affiliation(s)
- Xavier Barceló
- Trinity Centre for Biomedical Engineering, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, D02 R590, Ireland; Department of Mechanical, Manufacturing, & Biomedical Engineering, School of Engineering, Trinity College Dublin, Dublin, D02 R590, Ireland; Advanced Materials & Bioengineering Research Centre (AMBER), Royal College of Surgeons in Ireland & Trinity College Dublin, Dublin, D02 F6N2, Ireland
| | - Kian F Eichholz
- Trinity Centre for Biomedical Engineering, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, D02 R590, Ireland; Department of Mechanical, Manufacturing, & Biomedical Engineering, School of Engineering, Trinity College Dublin, Dublin, D02 R590, Ireland; Advanced Materials & Bioengineering Research Centre (AMBER), Royal College of Surgeons in Ireland & Trinity College Dublin, Dublin, D02 F6N2, Ireland
| | - Inês F Gonçalves
- Trinity Centre for Biomedical Engineering, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, D02 R590, Ireland; Department of Mechanical, Manufacturing, & Biomedical Engineering, School of Engineering, Trinity College Dublin, Dublin, D02 R590, Ireland; Advanced Materials & Bioengineering Research Centre (AMBER), Royal College of Surgeons in Ireland & Trinity College Dublin, Dublin, D02 F6N2, Ireland
| | - Orquidea Garcia
- Johnson & Johnson 3D Printing Innovation & Customer Solutions, Johnson & Johnson Services, Inc., Irvine, CA, USA
| | - Daniel J Kelly
- Trinity Centre for Biomedical Engineering, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, D02 R590, Ireland; Department of Mechanical, Manufacturing, & Biomedical Engineering, School of Engineering, Trinity College Dublin, Dublin, D02 R590, Ireland; Advanced Materials & Bioengineering Research Centre (AMBER), Royal College of Surgeons in Ireland & Trinity College Dublin, Dublin, D02 F6N2, Ireland; Department of Anatomy and Regenerative Medicine, Royal College of Surgeons in Ireland, Dublin, D02 YN77, Ireland.
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8
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She Y, Tang S, Zhu Z, Sun Y, Deng W, Wang S, Jiang N. Comparison of temporomandibular joint disc, meniscus, and intervertebral disc in fundamental characteristics and tissue engineering. J Biomed Mater Res B Appl Biomater 2023; 111:717-729. [PMID: 36221912 DOI: 10.1002/jbm.b.35178] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Revised: 09/24/2022] [Accepted: 09/27/2022] [Indexed: 01/21/2023]
Abstract
The temporomandibular joint (TMJ) disc, meniscus and intervertebral disc (IVD) are three fibrocartilage discs, which play critical roles in our daily life. Their degeneration contributes to diseases such as TMJ disorders, osteoarthritis and degenerative disc disease, affecting patients' quality of life and causing substantial morbidity and mortality. Interestingly, similar in some aspects of fundamental characteristics, they exhibit differences in other aspects such as biomechanical properties. Highlighting these similarities and differences can not only benefit a comprehensive understanding of them and their pathology but also assist in future research of tissue engineering. Likewise, comparing their tissue engineering in cell sources, scaffold and stimuli can guide imitation and improvement of their engineered discs. However, the anatomical structure, function, and biomechanical characteristics of the IVD, TMJ, and Meniscus have not been compared in any meaningful depth needed to advance current tissue engineering research on these joints, resulting in incomplete understanding of them and their pathology and ultimately limiting future research of tissue engineering. This review, for the first time, comprehensively compares three fibrocartilage discs in those aspects to cast light on their similarities and differences.
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Affiliation(s)
- Yilin She
- State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Disease and West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Shiyi Tang
- West China Medical School, Sichuan University, Chengdu, China
| | - Zilin Zhu
- College of Life Sciences, Sichuan University, Chengdu, China
| | - Yixin Sun
- State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Disease and West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Wanyu Deng
- State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Disease and West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Sicheng Wang
- State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Disease and West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Nan Jiang
- State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Disease and West China Hospital of Stomatology, Sichuan University, Chengdu, China
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9
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Guo X, Xi L, Yu M, Fan Z, Wang W, Ju A, Liang Z, Zhou G, Ren W. Regeneration of articular cartilage defects: Therapeutic strategies and perspectives. J Tissue Eng 2023; 14:20417314231164765. [PMID: 37025158 PMCID: PMC10071204 DOI: 10.1177/20417314231164765] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Accepted: 03/03/2023] [Indexed: 04/03/2023] Open
Abstract
Articular cartilage (AC), a bone-to-bone protective device made of up to 80% water and populated by only one cell type (i.e. chondrocyte), has limited capacity for regeneration and self-repair after being damaged because of its low cell density, alymphatic and avascular nature. Resulting repair of cartilage defects, such as osteoarthritis (OA), is highly challenging in clinical treatment. Fortunately, the development of tissue engineering provides a promising method for growing cells in cartilage regeneration and repair by using hydrogels or the porous scaffolds. In this paper, we review the therapeutic strategies for AC defects, including current treatment methods, engineering/regenerative strategies, recent advances in biomaterials, and present emphasize on the perspectives of gene regulation and therapy of noncoding RNAs (ncRNAs), such as circular RNA (circRNA) and microRNA (miRNA).
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Affiliation(s)
- Xueqiang Guo
- Institutes of Health Central Plain, The
Third Affiliated Hospital of Xinxiang Medical University, Clinical Medical Center of
Tissue Engineering and Regeneration, Xinxiang Medical University, Xinxiang,
China
| | - Lingling Xi
- Institutes of Health Central Plain, The
Third Affiliated Hospital of Xinxiang Medical University, Clinical Medical Center of
Tissue Engineering and Regeneration, Xinxiang Medical University, Xinxiang,
China
| | - Mengyuan Yu
- Institutes of Health Central Plain, The
Third Affiliated Hospital of Xinxiang Medical University, Clinical Medical Center of
Tissue Engineering and Regeneration, Xinxiang Medical University, Xinxiang,
China
| | - Zhenlin Fan
- Institutes of Health Central Plain, The
Third Affiliated Hospital of Xinxiang Medical University, Clinical Medical Center of
Tissue Engineering and Regeneration, Xinxiang Medical University, Xinxiang,
China
| | - Weiyun Wang
- Institutes of Health Central Plain, The
Third Affiliated Hospital of Xinxiang Medical University, Clinical Medical Center of
Tissue Engineering and Regeneration, Xinxiang Medical University, Xinxiang,
China
| | - Andong Ju
- Abdominal Surgical Oncology, Xinxiang
Central Hospital, Institute of the Fourth Affiliated Hospital of Xinxiang Medical
University, Xinxiang, China
| | - Zhuo Liang
- Institutes of Health Central Plain, The
Third Affiliated Hospital of Xinxiang Medical University, Clinical Medical Center of
Tissue Engineering and Regeneration, Xinxiang Medical University, Xinxiang,
China
| | - Guangdong Zhou
- Institutes of Health Central Plain, The
Third Affiliated Hospital of Xinxiang Medical University, Clinical Medical Center of
Tissue Engineering and Regeneration, Xinxiang Medical University, Xinxiang,
China
- Department of Plastic and
Reconstructive Surgery, Shanghai Key Lab of Tissue Engineering, Shanghai 9th
People’s Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai,
China
- Guangdong Zhou, Department of Plastic and
Reconstructive Surgery, Shanghai Key Lab of Tissue Engineering, Shanghai 9th
People’s Hospital, Shanghai Jiao Tong University School of Medicine, 639
Shanghai Manufacturing Bureau Road, Shanghai 200011, China.
| | - Wenjie Ren
- Institutes of Health Central Plain, The
Third Affiliated Hospital of Xinxiang Medical University, Clinical Medical Center of
Tissue Engineering and Regeneration, Xinxiang Medical University, Xinxiang,
China
- Wenjie Ren, Institute of Regenerative
Medicine and Orthopedics, Institutes of Health Central Plain, Xinxiang Medical
University, 601 Jinsui Avenue, Hongqi District, Xinxiang 453003, Henan, China.
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10
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Jin P, Liu L, Chen X, Cheng L, Zhang W, Zhong G. Applications and prospects of different functional hydrogels in meniscus repair. Front Bioeng Biotechnol 2022; 10:1082499. [PMID: 36568293 PMCID: PMC9773848 DOI: 10.3389/fbioe.2022.1082499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Accepted: 11/28/2022] [Indexed: 12/14/2022] Open
Abstract
The meniscus is a kind of fibrous cartilage structure that serves as a cushion in the knee joint to alleviate the mechanical load. It is commonly injured, but it cannot heal spontaneously. Traditional meniscectomy is not currently recommended as this treatment tends to cause osteoarthritis. Due to their good biocompatibility and versatile regulation, hydrogels are emerging biomaterials in tissue engineering. Hydrogels are excellent candidates in meniscus rehabilitation and regeneration because they are fine-tunable, easily modified, and capable of delivering exogenous drugs, cells, proteins, and cytokines. Various hydrogels have been reported to work well in meniscus-damaged animals, but few hydrogels are effective in the clinic, indicating that hydrogels possess many overlooked problems. In this review, we summarize the applications and problems of hydrogels in extrinsic substance delivery, meniscus rehabilitation, and meniscus regeneration. This study will provide theoretical guidance for new therapeutic strategies for meniscus repair.
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Affiliation(s)
- Pan Jin
- Health Science Center, Yangtze University, Jingzhou, China,Collaborative Innovation Centre of Regenerative Medicine and Medical BioResource Development and Application Co-constructed by the Province and Ministry, Guangxi Medical University, Nanning, China,*Correspondence: Pan Jin, ; Gang Zhong,
| | - Lei Liu
- Articular Surgery, The Second Nanning People’s Hospital (Third Affiliated Hospital of Guangxi Medical University), Nanning, China
| | - Xichi Chen
- Health Science Center, Yangtze University, Jingzhou, China
| | - Lin Cheng
- Health Science Center, Yangtze University, Jingzhou, China
| | - Weining Zhang
- Health Science Center, Yangtze University, Jingzhou, China
| | - Gang Zhong
- Center for Materials Synthetic Biology, CAS Key Laboratory of Quantitative Engineering Biology, Shenzhen Institute of Synthetic Biology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China,*Correspondence: Pan Jin, ; Gang Zhong,
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11
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The emerging role of 3D-printing in ocular drug delivery: Challenges, current status, and future prospects. J Drug Deliv Sci Technol 2022. [DOI: 10.1016/j.jddst.2022.103798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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12
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Peng Y, Lu M, Zhou Z, Wang C, Liu E, Zhang Y, Liu T, Zuo J. Natural biopolymer scaffold for meniscus tissue engineering. Front Bioeng Biotechnol 2022; 10:1003484. [PMID: 36246362 PMCID: PMC9561892 DOI: 10.3389/fbioe.2022.1003484] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Accepted: 09/16/2022] [Indexed: 11/26/2022] Open
Abstract
Meniscal injuries caused by trauma, degeneration, osteoarthritis, or other diseases always result in severe joint pain and motor dysfunction. Due to the unique anatomy of the human meniscus, the damaged meniscus lacks the ability to repair itself. Moreover, current clinical treatments for meniscal injuries, including meniscal suturing or resection, have significant limitations and drawbacks. With developments in tissue engineering, biopolymer scaffolds have shown promise in meniscal injury repair. They act as templates for tissue repair and regeneration, interacting with surrounding cells and providing structural support for newly formed meniscal tissue. Biomaterials offer tremendous advantages in terms of biocompatibility, bioactivity, and modifiable mechanical and degradation kinetics. In this study, the preparation and composition of meniscal biopolymer scaffolds, as well as their properties, are summarized. The current status of research and future research prospects for meniscal biopolymer scaffolds are reviewed in terms of collagen, silk, hyaluronic acid, chitosan, and extracellular matrix (ECM) materials. Overall, such a comprehensive summary provides constructive suggestions for the development of meniscal biopolymer scaffolds in tissue engineering.
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Affiliation(s)
- Yachen Peng
- Department of Orthopedics, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Meng Lu
- Department of Nursing, The First Bethune Hospital of Jilin University, Changchun, China
| | - Zhongsheng Zhou
- Scientific Research Center, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Chenyu Wang
- Department of Orthopedics, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Enbo Liu
- Department of Orthopedics, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Yanbo Zhang
- Department of Orthopedics, China-Japan Union Hospital of Jilin University, Changchun, China
- *Correspondence: Yanbo Zhang, ; Tong Liu, ; Jianlin Zuo,
| | - Tong Liu
- Department of Orthopedics, China-Japan Union Hospital of Jilin University, Changchun, China
- *Correspondence: Yanbo Zhang, ; Tong Liu, ; Jianlin Zuo,
| | - Jianlin Zuo
- Department of Orthopedics, China-Japan Union Hospital of Jilin University, Changchun, China
- *Correspondence: Yanbo Zhang, ; Tong Liu, ; Jianlin Zuo,
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13
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Pirmoradian M, Hooshmand T, Najafi F, Haghbin Nazarpak M, Davaie S. Design, synthesis, and characterization of a novel dual cross-linked gelatin-based bioadhesive for hard and soft tissues adhesion capability. Biomed Mater 2022; 17. [DOI: 10.1088/1748-605x/ac9268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Accepted: 09/15/2022] [Indexed: 11/11/2022]
Abstract
Abstract
Many surgical treatments require a suitable tissue adhesive that maintains its performance in wet conditions and can be applied simultaneously for hard and soft tissues. In the present study, a dual cross-linked tissue adhesive was synthesized by mixing the gelatin methacryloyl (Gel-MA) and gelatin-dopamine conjugate (Gel-Dopa). The setting reaction was based on a photopolymerization process in the presence of a combination of riboflavin and triethanolamine and a chemical cross-linking process attributed to the genipin as a natural cross-linker. Modified gelatin macromolecules were characterized and the best wavelength for free radical generation in the presence of riboflavin was obtained. Tissue adhesives were prepared with 30% hydrogels of Gel-MA and Gel-Dopa with different ratios in distilled water. The gelation occurred in a short time after light irradiation. The chemical, mechanical, physical, and cytotoxicity properties of the tissue adhesives were evaluated. The results showed that despite photopolymerization, chemical crosslinking with genipin played a more critical role in the setting process. Water uptake, degradation behavior, cytotoxicity, and adhesion properties of the adhesives were correlated with the ratio of the components. The SEM images showed a porous structure that could ensure the entry of cells and nutrients into the surgical area. While acceptable properties in most experiments were observed, all features were improved as the Gel-Dopa ratio increased. Also, the obtained hydrogels revealed excellent adhesive properties, particularly with bone even after wet incubation, and it was attributed to the amount of gelatin-dopamine conjugate. From the obtained results, it was concluded that a dual adhesive hydrogel based on gelatin macromolecules could be a good candidate as a tissue adhesive in wet condition.
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14
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İzbudak B, Bal-Öztürk A. The effect of LDHs nanoparticles on the cellular behavior of stem cell-laden 3D-bioprinted scaffold. J Biomater Appl 2022; 37:48-54. [PMID: 35452304 DOI: 10.1177/08853282221082921] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Three-dimensional (3D)-bioprinting as an emerging approach for tissue engineering possesses the promise to create highly mimicked organs or tissues by using computer-aided design. For biomedical applications in tissue engineering in our previous work, we developed an optimized nanocomposite bioink based on methylacrylated gelatin (GelMA), methylacrylated chitosan (ChitMA), and double-layered hydroxide (LDHs) nanoparticles by using 3D-bioprinting technology. Herein, we used the previous formulation to fabricate human bone marrow mesenchymal stem cells (hBMMSCs)-laden nanocomposite bioinks. The effect of LDHs nanoparticles on the cellular behaviors of the encapsulated-hBMMSCs in the scaffolds was evaluated for the first time. Live/Dead, PrestoBlue, and DAPI/Actin analysis were carried out to assess the cell viability, proliferation rate, and cellular morphology of encapsulated hBMMSCs within the scaffolds. In addition, osteogenic differentiation studies were performed culturing the scaffolds for up to 21 days. Results show that LDHs nanoparticles in the GelMA/ChitMA scaffold formulation increased the viability of hBMMSCs, did not cause any adverse effect on the proliferation rate, cell morphology of the hBMMSCs, and increased the Runx2 protein expression of the encapsulated-hBMMSCs in the scaffolds. This study progresses the LDHs containing nanocomposite bioink for cell printing applications in tissue engineering.
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15
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Kilic Bektas C, Zhang W, Mao Y, Wu X, Kohn J, Yelick PC. Self-Assembled Hydrogel Microparticle-Based Tooth-Germ Organoids. Bioengineering (Basel) 2022; 9:bioengineering9050215. [PMID: 35621493 PMCID: PMC9137977 DOI: 10.3390/bioengineering9050215] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Revised: 05/09/2022] [Accepted: 05/11/2022] [Indexed: 11/16/2022] Open
Abstract
Here, we describe the characterization of tooth-germ organoids, three-dimensional (3D) constructs cultured in vitro with the potential to develop into living teeth. To date, the methods used to successfully create tooth organoids capable of forming functional teeth have been quite limited. Recently, hydrogel microparticles (HMP) have demonstrated utility in tissue repair and regeneration based on their useful characteristics, including their scaffolding ability, effective cell and drug delivery, their ability to mimic the natural tissue extracellular matrix, and their injectability. These outstanding properties led us to investigate the utility of using HMPs (average diameter: 158 ± 32 µm) derived from methacrylated gelatin (GelMA) (degree of substitution: 100%) to create tooth organoids. The tooth organoids were created by seeding human dental pulp stem cells (hDPSCs) and porcine dental epithelial cells (pDE) onto the HMPs, which provided an extensive surface area for the cells to effectively attach and proliferate. Interestingly, the cell-seeded HMPs cultured on low-attachment tissue culture plates with gentle rocking self-assembled into organoids, within which the cells maintained their viability and morphology throughout the incubation period. The self-assembled organoids reached a volume of ~50 mm3 within two weeks of the in vitro tissue culture. The co-cultured hDPSC-HMP and pDE-HMP structures effectively attached to each other without any externally applied forces. The presence of polarized, differentiated dental cells in these composite tooth-bud organoids demonstrated the potential of self-assembled dental cell HMPs to form tooth-bud organoid-like structures for potential applications in tooth regeneration strategies.
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Affiliation(s)
- Cemile Kilic Bektas
- Department of Chemistry and Chemical Biology, Rutgers University, 123 Bevier Rd, Piscataway, NJ 08854, USA; (C.K.B.); (Y.M.); (X.W.); (J.K.)
| | - Weibo Zhang
- Division of Craniofacial and Molecular Genetics, Department of Orthodontics, Tufts University School of Dental Medicine, 1 Kneeland Avenue, Boston, MA 02111, USA;
| | - Yong Mao
- Department of Chemistry and Chemical Biology, Rutgers University, 123 Bevier Rd, Piscataway, NJ 08854, USA; (C.K.B.); (Y.M.); (X.W.); (J.K.)
| | - Xiaohuan Wu
- Department of Chemistry and Chemical Biology, Rutgers University, 123 Bevier Rd, Piscataway, NJ 08854, USA; (C.K.B.); (Y.M.); (X.W.); (J.K.)
| | - Joachim Kohn
- Department of Chemistry and Chemical Biology, Rutgers University, 123 Bevier Rd, Piscataway, NJ 08854, USA; (C.K.B.); (Y.M.); (X.W.); (J.K.)
| | - Pamela C. Yelick
- Division of Craniofacial and Molecular Genetics, Department of Orthodontics, Tufts University School of Dental Medicine, 1 Kneeland Avenue, Boston, MA 02111, USA;
- Correspondence:
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16
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Zhou YF, Zhang D, Yan WT, Lian K, Zhang ZZ. Meniscus Regeneration With Multipotent Stromal Cell Therapies. Front Bioeng Biotechnol 2022; 10:796408. [PMID: 35237572 PMCID: PMC8883323 DOI: 10.3389/fbioe.2022.796408] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2021] [Accepted: 01/11/2022] [Indexed: 12/20/2022] Open
Abstract
Meniscus is a semilunar wedge-shaped structure with fibrocartilaginous tissue, which plays an essential role in preventing the deterioration and degeneration of articular cartilage. Lesions or degenerations of it can lead to the change of biomechanical properties in the joints, which ultimately accelerate the degeneration of articular cartilage. Even with the manual intervention, lesions in the avascular region are difficult to be healed. Recent development in regenerative medicine of multipotent stromal cells (MSCs) has been investigated for the significant therapeutic potential in the repair of meniscal injuries. In this review, we provide a summary of the sources of MSCs involved in repairing and regenerative techniques, as well as the discussion of the avenues to utilizing these cells in MSC therapies. Finally, current progress on biomaterial implants was reviewed.
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Affiliation(s)
- Yun-Feng Zhou
- Department of Orthopedics, Xiangyang No.1 People’s Hospital, Hubei University of Medicine, Xiangyang, China
- Department of Orthopedics, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Di Zhang
- Department of Obstetrics-Gynecology, Xiangyang No.1 People’s Hospital, Hubei University of Medicine, Xiangyang, China
| | - Wan-Ting Yan
- Department of Orthopedics, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
- School of Medicine, Sun Yat-sen University, Shenzhen, China
| | - Kai Lian
- Department of Orthopedics, Xiangyang No.1 People’s Hospital, Hubei University of Medicine, Xiangyang, China
- *Correspondence: Zheng-Zheng Zhang, ; Kai Lian,
| | - Zheng-Zheng Zhang
- Department of Orthopedics, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
- *Correspondence: Zheng-Zheng Zhang, ; Kai Lian,
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17
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Stocco E, Porzionato A, De Rose E, Barbon S, Caro RD, Macchi V. Meniscus regeneration by 3D printing technologies: Current advances and future perspectives. J Tissue Eng 2022; 13:20417314211065860. [PMID: 35096363 PMCID: PMC8793124 DOI: 10.1177/20417314211065860] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Accepted: 11/24/2021] [Indexed: 01/10/2023] Open
Abstract
Meniscal tears are a frequent orthopedic injury commonly managed by conservative
strategies to avoid osteoarthritis development descending from altered
biomechanics. Among cutting-edge approaches in tissue engineering, 3D printing
technologies are extremely promising guaranteeing for complex biomimetic
architectures mimicking native tissues. Considering the anisotropic
characteristics of the menisci, and the ability of printing over structural
control, it descends the intriguing potential of such vanguard techniques to
meet individual joints’ requirements within personalized medicine. This
literature review provides a state-of-the-art on 3D printing for meniscus
reconstruction. Experiences in printing materials/technologies, scaffold types,
augmentation strategies, cellular conditioning have been compared/discussed;
outcomes of pre-clinical studies allowed for further considerations. To date,
translation to clinic of 3D printed meniscal devices is still a challenge:
meniscus reconstruction is once again clear expression of how the integration of
different expertise (e.g., anatomy, engineering, biomaterials science, cell
biology, and medicine) is required to successfully address native tissues
complexities.
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Affiliation(s)
- Elena Stocco
- Department of Neuroscience, Section of Human Anatomy, University of Padova, Padova, Italy
- L.i.f.e.L.a.b. Program, Consorzio per la Ricerca Sanitaria, Padova, Italy
| | - Andrea Porzionato
- Department of Neuroscience, Section of Human Anatomy, University of Padova, Padova, Italy
- L.i.f.e.L.a.b. Program, Consorzio per la Ricerca Sanitaria, Padova, Italy
| | - Enrico De Rose
- Department of Neuroscience, Section of Human Anatomy, University of Padova, Padova, Italy
| | - Silvia Barbon
- Department of Neuroscience, Section of Human Anatomy, University of Padova, Padova, Italy
- L.i.f.e.L.a.b. Program, Consorzio per la Ricerca Sanitaria, Padova, Italy
| | - Raffaele De Caro
- Department of Neuroscience, Section of Human Anatomy, University of Padova, Padova, Italy
- L.i.f.e.L.a.b. Program, Consorzio per la Ricerca Sanitaria, Padova, Italy
| | - Veronica Macchi
- Department of Neuroscience, Section of Human Anatomy, University of Padova, Padova, Italy
- L.i.f.e.L.a.b. Program, Consorzio per la Ricerca Sanitaria, Padova, Italy
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18
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Bahcecioglu G, Yue X, Howe E, Guldner I, Stack MS, Nakshatri H, Zhang S, Zorlutuna P. Aged Breast Extracellular Matrix Drives Mammary Epithelial Cells to an Invasive and Cancer-Like Phenotype. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2021; 8:e2100128. [PMID: 34617419 PMCID: PMC8596116 DOI: 10.1002/advs.202100128] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Revised: 07/26/2021] [Indexed: 05/04/2023]
Abstract
Age is a major risk factor for cancer. While the importance of age related genetic alterations in cells on cancer progression is well documented, the effect of aging extracellular matrix (ECM) has been overlooked. This study shows that the aging breast ECM alone is sufficient to drive normal human mammary epithelial cells (KTB21) to a more invasive and cancer-like phenotype, while promoting motility and invasiveness in MDA-MB-231 cells. Decellularized breast matrix from aged mice leads to loss of E-cadherin membrane localization in KTB21 cells, increased cell motility and invasion, and increased production of inflammatory cytokines and cancer-related proteins. The aged matrix upregulates cancer-related genes in KTB21 cells and enriches a cell subpopulation highly expressing epithelial-mesenchymal transition-related genes. Lysyl oxidase knockdown reverts the aged matrix-induced changes to the young levels; it relocalizes E-cadherin to cell membrane, and reduces cell motility, invasion, and cytokine production. These results show for the first time that the aging ECM harbors key biochemical, physical, and mechanical cues contributing to invasive and cancer-like behavior in healthy and cancer mammary cells. Differential response of cells to young and aged ECMs can lead to identification of new targets for cancer treatment and prevention.
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Affiliation(s)
- Gokhan Bahcecioglu
- Department of Aerospace and Mechanical EngineeringUniversity of Notre DameNotre DameIN46556USA
| | - Xiaoshan Yue
- Department of Aerospace and Mechanical EngineeringUniversity of Notre DameNotre DameIN46556USA
| | - Erin Howe
- Harper Cancer Research InstituteUniversity of Notre DameNotre DameIN46556USA
- Department of Biological SciencesUniversity of Notre DameNotre DameIN46556USA
| | - Ian Guldner
- Harper Cancer Research InstituteUniversity of Notre DameNotre DameIN46556USA
- Department of Biological SciencesUniversity of Notre DameNotre DameIN46556USA
| | - M. Sharon Stack
- Harper Cancer Research InstituteUniversity of Notre DameNotre DameIN46556USA
- Department of Chemistry and BiochemistryUniversity of Notre DameNotre DameIN46556USA
| | - Harikrishna Nakshatri
- Department of SurgerySchool of MedicineIndiana UniversityIndianapolisIN46202USA
- Department of Biochemistry and Molecular BiologySchool of MedicineIndiana UniversityIndianapolisIN46202USA
| | - Siyuan Zhang
- Harper Cancer Research InstituteUniversity of Notre DameNotre DameIN46556USA
- Department of Biological SciencesUniversity of Notre DameNotre DameIN46556USA
| | - Pinar Zorlutuna
- Department of Aerospace and Mechanical EngineeringUniversity of Notre DameNotre DameIN46556USA
- Harper Cancer Research InstituteUniversity of Notre DameNotre DameIN46556USA
- Bioengineering Graduate ProgramUniversity of Notre DameNotre DameIN46556USA
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Younas A, Gu H, Zhao Y, Zhang N. Novel approaches of the nanotechnology-based drug delivery systems for knee joint injuries: A review. Int J Pharm 2021; 608:121051. [PMID: 34454029 DOI: 10.1016/j.ijpharm.2021.121051] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Revised: 08/14/2021] [Accepted: 08/23/2021] [Indexed: 12/13/2022]
Abstract
The knee joint is one of the largest, most complex, and frequently utilized organs in the body. It is very vulnerable to injuries due to activities, diseases, or accidents, which lead to or cause knee joint injuries in people of all ages. There are several types of knee joint injuries such as contusions, sprains, and strains to the ligament, tendon injuries, cartilage injuries, meniscus injuries, and inflammation of synovial membrane. To date, many drug delivery systems, e.g. nanoparticles, dendrimers, liposomes, micelles, and exosomes, have been used for the treatment of knee joint injuries. They aim to alleviate or reverse the symptoms with an improvement of the function of the knee joint by restoring or curing it. The nanosized structures show good biodegradability, biocompatibility, precise site-specific delivery, prolonged drug release, and enhanced efficacy. They regulate cell proliferation and differentiation, ECM synthesis, proinflammatory factor secretion, etc. to promote repair of injuries. The goal of this review is to outline the finding and studies of the novel strategies of nanotechnology-based drug delivery systems and provide future perspectives to combat the challenges of knee joint injuries by using nanotechnology.
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Affiliation(s)
- Ayesha Younas
- Department of Pharmaceutics, School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou 450001, Henan, PR China; Key Laboratory of Targeting Therapy and Diagnosis for Critical Diseases, Henan Province, Zhengzhou 450001, Henan, PR China; Key Laboratory of Advanced Pharmaceutical Technology, Ministry of Education of China, Henan, Zhengzhou 450001, Henan, PR China
| | - Hongzhou Gu
- Fudan University Shanghai Cancer Center, and the Shanghai Key Laboratory of Medical Epigenetics, Institutes of Biomedical Sciences, Shanghai Stomatological Hospital, Fudan University, Shanghai 200032, PR China
| | - Yongxing Zhao
- Department of Pharmaceutics, School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou 450001, Henan, PR China; Key Laboratory of Targeting Therapy and Diagnosis for Critical Diseases, Henan Province, Zhengzhou 450001, Henan, PR China; Key Laboratory of Advanced Pharmaceutical Technology, Ministry of Education of China, Henan, Zhengzhou 450001, Henan, PR China.
| | - Nan Zhang
- Department of Pharmaceutics, School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou 450001, Henan, PR China; Key Laboratory of Targeting Therapy and Diagnosis for Critical Diseases, Henan Province, Zhengzhou 450001, Henan, PR China; Key Laboratory of Advanced Pharmaceutical Technology, Ministry of Education of China, Henan, Zhengzhou 450001, Henan, PR China.
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20
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Klarmann GJ, Gaston J, Ho VB. A review of strategies for development of tissue engineered meniscal implants. BIOMATERIALS AND BIOSYSTEMS 2021; 4:100026. [PMID: 36824574 PMCID: PMC9934480 DOI: 10.1016/j.bbiosy.2021.100026] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2021] [Revised: 08/17/2021] [Accepted: 08/25/2021] [Indexed: 12/09/2022] Open
Abstract
The meniscus is a key stabilizing tissue of the knee that facilitates proper tracking and movement of the knee joint and absorbs stresses related to physical activity. This review article describes the biology, structure, and functions of the human knee meniscus, common tears and repair approaches, and current research and development approaches using modern methods to fabricate a scaffold or tissue engineered meniscal replacement. Meniscal tears are quite common, often resulting from sports or physical training, though injury can result without specific contact during normal physical activity such as bending or squatting. Meniscal injuries often require surgical intervention to repair, restore basic functionality and relieve pain, and severe damage may warrant reconstruction using allograft transplants or commercial implant devices. Ongoing research is attempting to develop alternative scaffold and tissue engineered devices using modern fabrication techniques including three-dimensional (3D) printing which can fabricate a patient-specific meniscus replacement. An ideal meniscal substitute should have mechanical properties that are close to that of natural human meniscus, and also be easily adapted for surgical procedures and fixation. A better understanding of the organization and structure of the meniscus as well as its potential points of failure will lead to improved design approaches to generate a suitable and functional replacement.
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Affiliation(s)
- George J. Klarmann
- 4D Bio³ Center, Department of Radiology and Radiological Sciences, Uniformed Services University of the Health Sciences, 4301 Jones Bridge Rd., Bethesda, MD 20814, USA,The Geneva Foundation, 917 Pacific Ave., Tacoma, WA 98402, USA,Corresponding author at: USU-4D Bio³ Center, 9410 Key West Ave., Rockville, MD 20850, USA.
| | - Joel Gaston
- 4D Bio³ Center, Department of Radiology and Radiological Sciences, Uniformed Services University of the Health Sciences, 4301 Jones Bridge Rd., Bethesda, MD 20814, USA,The Geneva Foundation, 917 Pacific Ave., Tacoma, WA 98402, USA
| | - Vincent B. Ho
- 4D Bio³ Center, Department of Radiology and Radiological Sciences, Uniformed Services University of the Health Sciences, 4301 Jones Bridge Rd., Bethesda, MD 20814, USA
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21
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Asgarpour R, Masaeli E, Kermani S. Development of meniscus‐inspired 3D‐printed PCL scaffolds engineered with chitosan/extracellular matrix hydrogel. POLYM ADVAN TECHNOL 2021. [DOI: 10.1002/pat.5465] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Rahil Asgarpour
- Department of Tissue Engineering, Najafabad Branch Islamic Azad University Najafabad Iran
| | - Elahe Masaeli
- Department of Animal Biotechnology, Cell Science Research Center Royan Institute for Biotechnology, ACECR Isfahan Iran
| | - Shabnam Kermani
- Department of Tissue Engineering, Najafabad Branch Islamic Azad University Najafabad Iran
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22
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Li H, Li P, Yang Z, Gao C, Fu L, Liao Z, Zhao T, Cao F, Chen W, Peng Y, Yuan Z, Sui X, Liu S, Guo Q. Meniscal Regenerative Scaffolds Based on Biopolymers and Polymers: Recent Status and Applications. Front Cell Dev Biol 2021; 9:661802. [PMID: 34327197 PMCID: PMC8313827 DOI: 10.3389/fcell.2021.661802] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Accepted: 06/15/2021] [Indexed: 12/12/2022] Open
Abstract
Knee menisci are structurally complex components that preserve appropriate biomechanics of the knee. Meniscal tissue is susceptible to injury and cannot heal spontaneously from most pathologies, especially considering the limited regenerative capacity of the inner avascular region. Conventional clinical treatments span from conservative therapy to meniscus implantation, all with limitations. There have been advances in meniscal tissue engineering and regenerative medicine in terms of potential combinations of polymeric biomaterials, endogenous cells and stimuli, resulting in innovative strategies. Recently, polymeric scaffolds have provided researchers with a powerful instrument to rationally support the requirements for meniscal tissue regeneration, ranging from an ideal architecture to biocompatibility and bioactivity. However, multiple challenges involving the anisotropic structure, sophisticated regenerative process, and challenging healing environment of the meniscus still create barriers to clinical application. Advances in scaffold manufacturing technology, temporal regulation of molecular signaling and investigation of host immunoresponses to scaffolds in tissue engineering provide alternative strategies, and studies have shed light on this field. Accordingly, this review aims to summarize the current polymers used to fabricate meniscal scaffolds and their applications in vivo and in vitro to evaluate their potential utility in meniscal tissue engineering. Recent progress on combinations of two or more types of polymers is described, with a focus on advanced strategies associated with technologies and immune compatibility and tunability. Finally, we discuss the current challenges and future prospects for regenerating injured meniscal tissues.
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Affiliation(s)
- Hao Li
- The First Medical Center, Chinese PLA General Hospital, Institute of Orthopedics, Beijing, China.,Beijing Key Lab of Regenerative Medicine in Orthopedics, Beijing, China.,Key Laboratory of Musculoskeletal Trauma and War Injuries PLA, Beijing, China.,School of Medicine, Nankai University, Tianjin, China
| | - Pinxue Li
- The First Medical Center, Chinese PLA General Hospital, Institute of Orthopedics, Beijing, China.,Beijing Key Lab of Regenerative Medicine in Orthopedics, Beijing, China.,Key Laboratory of Musculoskeletal Trauma and War Injuries PLA, Beijing, China.,School of Medicine, Nankai University, Tianjin, China
| | - Zhen Yang
- The First Medical Center, Chinese PLA General Hospital, Institute of Orthopedics, Beijing, China.,Beijing Key Lab of Regenerative Medicine in Orthopedics, Beijing, China.,Key Laboratory of Musculoskeletal Trauma and War Injuries PLA, Beijing, China.,School of Medicine, Nankai University, Tianjin, China
| | - Cangjian Gao
- The First Medical Center, Chinese PLA General Hospital, Institute of Orthopedics, Beijing, China.,Beijing Key Lab of Regenerative Medicine in Orthopedics, Beijing, China.,Key Laboratory of Musculoskeletal Trauma and War Injuries PLA, Beijing, China.,School of Medicine, Nankai University, Tianjin, China
| | - Liwei Fu
- The First Medical Center, Chinese PLA General Hospital, Institute of Orthopedics, Beijing, China.,Beijing Key Lab of Regenerative Medicine in Orthopedics, Beijing, China.,Key Laboratory of Musculoskeletal Trauma and War Injuries PLA, Beijing, China.,School of Medicine, Nankai University, Tianjin, China
| | - Zhiyao Liao
- The First Medical Center, Chinese PLA General Hospital, Institute of Orthopedics, Beijing, China.,Beijing Key Lab of Regenerative Medicine in Orthopedics, Beijing, China.,Key Laboratory of Musculoskeletal Trauma and War Injuries PLA, Beijing, China.,School of Medicine, Nankai University, Tianjin, China
| | - Tianyuan Zhao
- The First Medical Center, Chinese PLA General Hospital, Institute of Orthopedics, Beijing, China.,Beijing Key Lab of Regenerative Medicine in Orthopedics, Beijing, China.,Key Laboratory of Musculoskeletal Trauma and War Injuries PLA, Beijing, China.,School of Medicine, Nankai University, Tianjin, China
| | - Fuyang Cao
- The First Medical Center, Chinese PLA General Hospital, Institute of Orthopedics, Beijing, China.,Beijing Key Lab of Regenerative Medicine in Orthopedics, Beijing, China.,Key Laboratory of Musculoskeletal Trauma and War Injuries PLA, Beijing, China
| | - Wei Chen
- The First Medical Center, Chinese PLA General Hospital, Institute of Orthopedics, Beijing, China.,Beijing Key Lab of Regenerative Medicine in Orthopedics, Beijing, China.,Key Laboratory of Musculoskeletal Trauma and War Injuries PLA, Beijing, China.,School of Medicine, Nankai University, Tianjin, China
| | - Yu Peng
- School of Medicine, Nankai University, Tianjin, China
| | - Zhiguo Yuan
- Department of Bone and Joint Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Xiang Sui
- The First Medical Center, Chinese PLA General Hospital, Institute of Orthopedics, Beijing, China.,Beijing Key Lab of Regenerative Medicine in Orthopedics, Beijing, China.,Key Laboratory of Musculoskeletal Trauma and War Injuries PLA, Beijing, China
| | - Shuyun Liu
- The First Medical Center, Chinese PLA General Hospital, Institute of Orthopedics, Beijing, China.,Beijing Key Lab of Regenerative Medicine in Orthopedics, Beijing, China.,Key Laboratory of Musculoskeletal Trauma and War Injuries PLA, Beijing, China
| | - Quanyi Guo
- The First Medical Center, Chinese PLA General Hospital, Institute of Orthopedics, Beijing, China.,Beijing Key Lab of Regenerative Medicine in Orthopedics, Beijing, China.,Key Laboratory of Musculoskeletal Trauma and War Injuries PLA, Beijing, China.,School of Medicine, Nankai University, Tianjin, China
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Lee AKX, Lin YH, Tsai CH, Chang WT, Lin TL, Shie MY. Digital Light Processing Bioprinted Human Chondrocyte-Laden Poly (γ-Glutamic Acid)/Hyaluronic Acid Bio-Ink towards Cartilage Tissue Engineering. Biomedicines 2021; 9:biomedicines9070714. [PMID: 34201600 PMCID: PMC8301387 DOI: 10.3390/biomedicines9070714] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Revised: 06/08/2021] [Accepted: 06/16/2021] [Indexed: 12/13/2022] Open
Abstract
Cartilage injury is the main cause of disability in the United States, and it has been projected that cartilage injury caused by osteoarthritis will affect 30% of the entire United States population by the year 2030. In this study, we modified hyaluronic acid (HA) with γ-poly(glutamic) acid (γ-PGA), both of which are common biomaterials used in cartilage engineering, in an attempt to evaluate them for their potential in promoting cartilage regeneration. As seen from the results, γ-PGA-GMA and HA, with glycidyl methacrylate (GMA) as the photo-crosslinker, could be successfully fabricated while retaining the structural characteristics of γ-PGA and HA. In addition, the storage moduli and loss moduli of the hydrogels were consistent throughout the curing durations. However, it was noted that the modification enhanced the mechanical properties, the swelling equilibrium rate, and cellular proliferation, and significantly improved secretion of cartilage regeneration-related proteins such as glycosaminoglycan (GAG) and type II collagen (Col II). The cartilage tissue proof with Alcian blue further demonstrated that the modification of γ-PGA with HA exhibited suitability for cartilage tissue regeneration and displayed potential for future cartilage tissue engineering applications. This study built on the previous works involving HA and further showed that there are unlimited ways to modify various biomaterials in order to further bring cartilage tissue engineering to the next level.
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Affiliation(s)
- Alvin Kai-Xing Lee
- School of Medicine, China Medical University, Taichung 406040, Taiwan; (A.K.-X.L.); (C.-H.T.)
- x-Dimension Center for Medical Research and Translation, China Medical University Hospital, Taichung 40447, Taiwan; (Y.-H.L.); (W.-T.C.)
| | - Yen-Hong Lin
- x-Dimension Center for Medical Research and Translation, China Medical University Hospital, Taichung 40447, Taiwan; (Y.-H.L.); (W.-T.C.)
- The Ph.D. Program for Medical Engineering and Rehabilitation Science, China Medical University, Taichung 406040, Taiwan
| | - Chun-Hao Tsai
- School of Medicine, China Medical University, Taichung 406040, Taiwan; (A.K.-X.L.); (C.-H.T.)
- Department of Orthopedics, China Medical University Hospital, Taichung 406040, Taiwan
- Department of Sports Medicine, College of Health Care, China Medical University, Taichung 406040, Taiwan
| | - Wan-Ting Chang
- x-Dimension Center for Medical Research and Translation, China Medical University Hospital, Taichung 40447, Taiwan; (Y.-H.L.); (W.-T.C.)
| | - Tsung-Li Lin
- Department of Orthopedics, China Medical University Hospital, Taichung 406040, Taiwan
- Department of Sports Medicine, College of Health Care, China Medical University, Taichung 406040, Taiwan
- Graduate Institute of Biomedical Sciences, China Medical University, Taichung 406040, Taiwan
- Correspondence: (T.-L.L.); (M.-Y.S.); Tel.: +886-4-22967979 (ext. 3700) (T.-L.L.)
| | - Ming-You Shie
- x-Dimension Center for Medical Research and Translation, China Medical University Hospital, Taichung 40447, Taiwan; (Y.-H.L.); (W.-T.C.)
- School of Dentistry, China Medical University, Taichung City 40447, Taiwan
- Department of Bioinformatics and Medical Engineering, Asia University, Taichung City 41354, Taiwan
- Correspondence: (T.-L.L.); (M.-Y.S.); Tel.: +886-4-22967979 (ext. 3700) (T.-L.L.)
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24
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Tamay DG, Hasirci N. Bioinks-materials used in printing cells in designed 3D forms. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2021; 32:1072-1106. [PMID: 33720806 DOI: 10.1080/09205063.2021.1892470] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
Use of materials to activate non-functional or damaged organs and tissues goes back to early ages. The first materials used for this purpose were metals, and in time, novel materials such as ceramics, polymers and composites were introduced to the field to serve in medical applications. In the last decade, the advances in material sciences, cell biology, technology and engineering made 3D printing of living tissues or organ models in the designed structure and geometry possible by using cells alone or together with hydrogels through additive manufacturing. This review aims to give a brief information about the chemical structures and properties of bioink materials and their applications in the production of 3D tissue constructs.
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Affiliation(s)
- Dilara Goksu Tamay
- BIOMATEN - Center of Excellence in Biomaterials and Tissue Engineering, Middle East Technical University, Ankara, Turkey.,Department of Biomedical Engineering, Middle East Technical University, Ankara, Turkey
| | - Nesrin Hasirci
- BIOMATEN - Center of Excellence in Biomaterials and Tissue Engineering, Middle East Technical University, Ankara, Turkey.,Department of Biomedical Engineering, Middle East Technical University, Ankara, Turkey.,Department of Chemistry, Middle East Technical University, Ankara, Turkey.,Tissue Engineering and Biomaterial Research Center, Near East University, TRNC, Mersin 10, Turkey
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25
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Evaluation of Marine Agarose Biomaterials for Tissue Engineering Applications. Int J Mol Sci 2021; 22:ijms22041923. [PMID: 33672027 PMCID: PMC7919481 DOI: 10.3390/ijms22041923] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Revised: 02/11/2021] [Accepted: 02/13/2021] [Indexed: 12/18/2022] Open
Abstract
Five agarose types (D1LE, D2LE, LM, MS8 and D5) were evaluated in tissue engineering and compared for the first time using an array of analysis methods. Acellular and cellular constructs were generated from 0.3–3%, and their biomechanical properties, in vivo biocompatibility (as determined by LIVE/DEAD, WST-1 and DNA release, with n = 6 per sample) and in vivo biocompatibility (by hematological and biochemical analyses and histology, with n = 4 animals per agarose type) were analyzed. Results revealed that the biomechanical properties of each hydrogel were related to the agarose concentration (p < 0.001). Regarding the agarose type, the highest (p < 0.001) Young modulus, stress at fracture and break load were D1LE, D2LE and D5, whereas the strain at fracture was higher in D5 and MS8 at 3% (p < 0.05). All agaroses showed high biocompatibility on human skin cells, especially in indirect contact, with a correlation with agarose concentration (p = 0.0074 for LIVE/DEAD and p = 0.0014 for WST-1) and type, although cell function tended to decrease in direct contact with highly concentrated agaroses. All agaroses were safe in vivo, with no systemic effects as determined by hematological and biochemical analysis and histology of major organs. Locally, implants were partially encapsulated and a pro-regenerative response with abundant M2-type macrophages was found. In summary, we may state that all these agarose types can be safely used in tissue engineering and that the biomechanical properties and biocompatibility were strongly associated to the agarose concentration in the hydrogel and partially associated to the agarose type. These results open the door to the generation of specific agarose-based hydrogels for definite clinical applications such as the human skin, cornea or oral mucosa.
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26
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Farzanfar S, Kouzekonan GS, Mirjani R, Shekarchi B. Vitamin B12-loaded polycaprolacton/gelatin nanofibrous scaffold as potential wound care material. Biomed Eng Lett 2020; 10:547-554. [PMID: 33194247 DOI: 10.1007/s13534-020-00165-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2020] [Revised: 07/15/2020] [Accepted: 07/20/2020] [Indexed: 12/15/2022] Open
Abstract
The current study aimed to develop a potential wound dressing using vitamin B12-loaded polycaprolacton/gelatin nanofibrous scaffold. In order to produce wound dressings, 1000 mcg of vitamin B12 was added to polycaprolacton/gelatin solution and the nanofibrous scaffolds were fabricated through electrospinning method. The obtained scaffolds were studied regarding their hydrophobicity, microstructure, amount of water absorption, water vapor permeability, tensile strength, release test, and cellular proliferation assay. In vitro studies revealed that the incorporation of vitamin b12 into polycaprolacton/gelatin scaffolds could significantly augment L929 cells proliferation at 1 and 3 days post-seeding. However, there was not statistically significant difference between Vitamin B12-containing and polymer-only scaffolds in tensile strength study, surface wettability measurement, water vapor transmission test, the capacity for water absorption, and nanofiber's diameter. Both vitamin containing and free dressings were applied on the full-thickness excisional wound in rat model to compare their healing potential. Our results showed that after 14 days, vitamin B12 containing dressing could significantly enhance wound closure compared to vitamin B12 free scaffolds (92.27 ± 6.84% vs. 64.62 ± 2.96%). Furthermore, histopathological examinations showed significantly greater epithelial thickness in polycaprolacton/gelatin/vitamin B12 group compared to other experimental groups. This preliminary study suggest potential applicability of the proposed dressing to treat skin wounds in clinic.
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Affiliation(s)
| | | | - Ruhollah Mirjani
- Department of Genetics and Advanced Medical Technology, Faculty of Medicine, AJA University of Medical Sciences, Tehran, Iran
| | - Babak Shekarchi
- AJA Radiation Sciences Research Center (ARSRC), Tehran, Iran
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27
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Li H, Fan W, Zhu X. Three‐dimensional printing: The potential technology widely used in medical fields. J Biomed Mater Res A 2020; 108:2217-2229. [DOI: 10.1002/jbm.a.36979] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Revised: 03/30/2020] [Accepted: 04/04/2020] [Indexed: 12/19/2022]
Affiliation(s)
- Hongjian Li
- Southern Marine Science and Engineering Guangdong Laboratory ZhanjiangMarine Medical Research Institute of Guangdong Zhanjiang (GDZJMMRI), Guangdong Medical University Zhanjiang China
| | - Wenguo Fan
- Department of Anesthesiology, Guanghua School of StomatologyHospital of Stomatology, Sun Yat‐sen University Guangzhou China
| | - Xiao Zhu
- Southern Marine Science and Engineering Guangdong Laboratory ZhanjiangMarine Medical Research Institute of Guangdong Zhanjiang (GDZJMMRI), Guangdong Medical University Zhanjiang China
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28
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Bahcecioglu G, Basara G, Ellis BW, Ren X, Zorlutuna P. Breast cancer models: Engineering the tumor microenvironment. Acta Biomater 2020; 106:1-21. [PMID: 32045679 PMCID: PMC7185577 DOI: 10.1016/j.actbio.2020.02.006] [Citation(s) in RCA: 87] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Revised: 01/14/2020] [Accepted: 02/05/2020] [Indexed: 12/24/2022]
Abstract
The mechanisms behind cancer initiation and progression are not clear. Therefore, development of clinically relevant models to study cancer biology and drug response in tumors is essential. In vivo models are very valuable tools for studying cancer biology and for testing drugs; however, they often suffer from not accurately representing the clinical scenario because they lack either human cells or a functional immune system. On the other hand, two-dimensional (2D) in vitro models lack the three-dimensional (3D) network of cells and extracellular matrix (ECM) and thus do not represent the tumor microenvironment (TME). As an alternative approach, 3D models have started to gain more attention, as such models offer a platform with the ability to study cell-cell and cell-material interactions parametrically, and possibly include all the components present in the TME. Here, we first give an overview of the breast cancer TME, and then discuss the current state of the pre-clinical breast cancer models, with a focus on the engineered 3D tissue models. We also highlight two engineering approaches that we think are promising in constructing models representative of human tumors: 3D printing and microfluidics. In addition to giving basic information about the TME in the breast tissue, this review article presents the state-of-the-art tissue engineered breast cancer models. STATEMENT OF SIGNIFICANCE: Involvement of biomaterials and tissue engineering fields in cancer research enables realistic mimicry of the cell-cell and cell-extracellular matrix (ECM) interactions in the tumor microenvironment (TME), and thus creation of better models that reflect the tumor response against drugs. Engineering the 3D in vitro models also requires a good understanding of the TME. Here, an overview of the breast cancer TME is given, and the current state of the pre-clinical breast cancer models, with a focus on the engineered 3D tissue models is discussed. This review article is useful not only for biomaterials scientists aiming to engineer 3D in vitro TME models, but also for cancer researchers willing to use these models for studying cancer biology and drug testing.
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Affiliation(s)
- Gokhan Bahcecioglu
- Department of Aerospace and Mechanical Engineering, University of Notre Dame, Notre Dame, IN 46556, United States
| | - Gozde Basara
- Department of Aerospace and Mechanical Engineering, University of Notre Dame, Notre Dame, IN 46556, United States
| | - Bradley W Ellis
- Bioengineering Graduate Program, University of Notre Dame, Notre Dame, IN 46556, United States
| | - Xiang Ren
- Department of Aerospace and Mechanical Engineering, University of Notre Dame, Notre Dame, IN 46556, United States
| | - Pinar Zorlutuna
- Department of Aerospace and Mechanical Engineering, University of Notre Dame, Notre Dame, IN 46556, United States; Bioengineering Graduate Program, University of Notre Dame, Notre Dame, IN 46556, United States; Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, IN 46556, United States; Harper Cancer Research Institute, University of Notre Dame, Notre Dame, IN 46556, United States.
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29
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Kilic Bektas C, Hasirci V. Cell loaded 3D bioprinted GelMA hydrogels for corneal stroma engineering. Biomater Sci 2020; 8:438-449. [DOI: 10.1039/c9bm01236b] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Tissue engineering aims to replace missing or damaged tissues and restore their functions.
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Affiliation(s)
- Cemile Kilic Bektas
- Department of Biological Sciences
- Middle East Technical University (METU)
- Ankara
- Turkey
- Department of Biotechnology
| | - Vasif Hasirci
- Department of Biological Sciences
- Middle East Technical University (METU)
- Ankara
- Turkey
- Department of Biotechnology
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30
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Kilic Bektas C, Hasirci V. Cell Loaded GelMA:HEMA IPN hydrogels for corneal stroma engineering. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2019; 31:2. [PMID: 31811387 DOI: 10.1007/s10856-019-6345-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Accepted: 11/16/2019] [Indexed: 06/10/2023]
Abstract
Stroma is the main refractive element of the cornea and damage to it is one of the main causes of blindness. In this study, cell loaded hydrogels of methacrylated gelatin (GelMA) and poly(2-hydroxyethyl methacrylate) (pHEMA) (8:2) interpenetrating network (IPN) hydrogels were prepared as the corneal stroma substitute and tested in situ and in vitro. Compressive modulus of the GelMA hydrogels was significantly enhanced with the addition of pHEMA in the structure (6.53 vs 155.49 kPa, respectively). More than 90% of the stromal keratocytes were viable in the GelMA and GelMA-HEMA hydrogels as calculated by Live-Dead Assay and NIH Image-J program. Cells synthesized representative collagens and proteoglycans in the hydrogels indicating that they preserved their keratocyte functions. Transparency of the cell loaded GelMA-HEMA hydrogels was increased significantly up to 90% at 700 nm during three weeks of incubation and was comparable with the transparency of native cornea. Cell loaded GelMA-HEMA corneal stroma model is novel and reported for the first time in the literature in terms of introduction of cells during the preparation phase of the hydrogels. The appropriate mechanical strength and high transparency of the cell loaded constructs indicates a viable alternative to the current devices used in the treatment of corneal blindness.
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Affiliation(s)
- Cemile Kilic Bektas
- Department of Biological Sciences, Middle East Technical University (METU), Ankara, Turkey
- Department of Biotechnology, METU, Ankara, Turkey
- BIOMATEN, METU Center of Excellence in Biomaterials and Tissue Engineering, Ankara, Turkey
| | - Vasif Hasirci
- Department of Biological Sciences, Middle East Technical University (METU), Ankara, Turkey.
- Department of Biotechnology, METU, Ankara, Turkey.
- BIOMATEN, METU Center of Excellence in Biomaterials and Tissue Engineering, Ankara, Turkey.
- Department of Medical Engineering, Acıbadem Mehmet Ali Aydınlar University, Istanbul, Turkey.
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31
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Bandyopadhyay A, Mandal BB. A three-dimensional printed silk-based biomimetic tri-layered meniscus for potential patient-specific implantation. Biofabrication 2019; 12:015003. [PMID: 31480031 DOI: 10.1088/1758-5090/ab40fa] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Employing tissue engineering principles aided by three-dimensional (3D) printing strategies to fabricate meniscus tissue constructs could help patients with meniscus injury regain mobility, improve pain management and reduce the risk of development of knee osteoarthritis. Here we report a 3D printed meniscus scaffold that biomimics the internal and bulk architecture of the menisci. A shear-thinning novel silk fibroin-gelatin-based bioink with high print fidelity was optimized for the fabrication of scaffolds to serve as potential meniscus implants. Physicochemical characterization of the fabricated scaffolds shows optimum swelling, degradation and mechanical properties. Further, the scaffolds were seeded with meniscus fibrochondrocytes to validate their bioactivity. Fibrochondrocytes seeded on the scaffolds maintained their phenotype and proliferation, and enhanced glycosaminoglycan and total collagen synthesis was observed. Gene expression profile, biochemical quantification and histological studies confirmed the ability of the scaffolds to form meniscus-like tissue constructs. The scaffolds were found to possess amenable immunocompatibility in vitro as well as in vivo. Due to their excellent biological and physicochemical characteristics, these 3D printed scaffolds may be fine-tuned into viable alternatives to the present clinical treatment approaches to meniscus repair.
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Affiliation(s)
- Ashutosh Bandyopadhyay
- Biomaterial and Tissue Engineering Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati 781039, India
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32
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Chiriac AP, Ghilan A, Neamtu I, Nita LE, Rusu AG, Chiriac VM. Advancement in the Biomedical Applications of the (Nano)gel Structures Based on Particular Polysaccharides. Macromol Biosci 2019; 19:e1900187. [DOI: 10.1002/mabi.201900187] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Revised: 06/18/2019] [Indexed: 12/25/2022]
Affiliation(s)
- Aurica P. Chiriac
- “Petru Poni” Institute of Macromolecular ChemistryLaboratory of Inorganic Polymers 41‐A Grigore Ghica Voda Alley 700487 Iaşi Romania
| | - Alina Ghilan
- “Petru Poni” Institute of Macromolecular ChemistryLaboratory of Inorganic Polymers 41‐A Grigore Ghica Voda Alley 700487 Iaşi Romania
| | - Iordana Neamtu
- “Petru Poni” Institute of Macromolecular ChemistryLaboratory of Inorganic Polymers 41‐A Grigore Ghica Voda Alley 700487 Iaşi Romania
| | - Loredana E. Nita
- “Petru Poni” Institute of Macromolecular ChemistryLaboratory of Inorganic Polymers 41‐A Grigore Ghica Voda Alley 700487 Iaşi Romania
| | - Alina G. Rusu
- “Petru Poni” Institute of Macromolecular ChemistryLaboratory of Inorganic Polymers 41‐A Grigore Ghica Voda Alley 700487 Iaşi Romania
| | - Vlad Mihai Chiriac
- “Gh. Asachi” Technical UniversityFaculty of ElectronicsTelecommunications and Information Technology Bd. Carol I no. 11A 700506 Iaşi Romania
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33
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Bahcecioglu G, Bilgen B, Hasirci N, Hasirci V. Anatomical meniscus construct with zone specific biochemical composition and structural organization. Biomaterials 2019; 218:119361. [PMID: 31336280 DOI: 10.1016/j.biomaterials.2019.119361] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2018] [Revised: 06/29/2019] [Accepted: 07/14/2019] [Indexed: 12/30/2022]
Abstract
A PCL/hydrogel construct that would mimic the structural organization, biochemistry and anatomy of meniscus was engineered. The compressive (380 ± 40 kPa) and tensile modulus (18.2 ± 0.9 MPa) of the PCL scaffolds were increased significantly when constructs were printed with a shifted design and circumferential strands mimicking the collagen organization in native tissue (p < 0.05). Presence of circumferentially aligned PCL strands also led to elongation and alignment of the human fibrochondrocytes. Gene expression of the cells in agarose (Ag), gelatin methacrylate (GelMA), and GelMA-Ag hydrogels was significantly higher than that of cells on the PCL scaffolds after a 21-day culture. GelMA exhibited the highest level of collagen type I (COL1A2) mRNA expression, while GelMA-Ag exhibited the highest level of aggrecan (AGG) expression (p < 0.001, compared to PCL). GelMA and GelMA-Ag exhibited a high level of collagen type II (COL2A1) expression (p < 0.05, compared to PCL). Anatomical scaffolds with circumferential PCL strands were impregnated with cell-loaded GelMA in the periphery and GelMA-Ag in the inner region. GelMA and GelMA-Ag hydrogels enhanced the production of COL 1 and COL 2 proteins after a 6-week culture (p < 0.05). COL 1 expression increased gradually towards the outer periphery, while COL 2 expression decreased. We were thus able to engineer an anatomical meniscus with a cartilage-like inner region and fibrocartilage-like outer region.
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Affiliation(s)
- G Bahcecioglu
- Center of Excellence in Biomaterials and Tissue Engineering, BIOMATEN, Middle East Technical University, Ankara, Turkey; Department of Biological Sciences, Middle East Technical University, Ankara, Turkey; Graduate Department of Biotechnology, Middle East Technical University, Ankara, Turkey
| | - B Bilgen
- Providence VA Medical Center, Providence, RI, USA; Department of Orthopaedics, The Warren Alpert Medical School of Brown University and Rhode Island Hospital, Providence, RI, USA
| | - N Hasirci
- Center of Excellence in Biomaterials and Tissue Engineering, BIOMATEN, Middle East Technical University, Ankara, Turkey; Graduate Department of Biotechnology, Middle East Technical University, Ankara, Turkey; Department of Chemistry, Middle East Technical University, Ankara, Turkey
| | - V Hasirci
- Center of Excellence in Biomaterials and Tissue Engineering, BIOMATEN, Middle East Technical University, Ankara, Turkey; Department of Biological Sciences, Middle East Technical University, Ankara, Turkey; Graduate Department of Biotechnology, Middle East Technical University, Ankara, Turkey; Department of Medical Engineering, Acibadem Mehmet Ali Aydinlar University, Istanbul, Turkey.
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34
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Tamay DG, Dursun Usal T, Alagoz AS, Yucel D, Hasirci N, Hasirci V. 3D and 4D Printing of Polymers for Tissue Engineering Applications. Front Bioeng Biotechnol 2019; 7:164. [PMID: 31338366 PMCID: PMC6629835 DOI: 10.3389/fbioe.2019.00164] [Citation(s) in RCA: 177] [Impact Index Per Article: 35.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Accepted: 06/21/2019] [Indexed: 12/18/2022] Open
Abstract
Three-dimensional (3D) and Four-dimensional (4D) printing emerged as the next generation of fabrication techniques, spanning across various research areas, such as engineering, chemistry, biology, computer science, and materials science. Three-dimensional printing enables the fabrication of complex forms with high precision, through a layer-by-layer addition of different materials. Use of intelligent materials which change shape or color, produce an electrical current, become bioactive, or perform an intended function in response to an external stimulus, paves the way for the production of dynamic 3D structures, which is now called 4D printing. 3D and 4D printing techniques have great potential in the production of scaffolds to be applied in tissue engineering, especially in constructing patient specific scaffolds. Furthermore, physical and chemical guidance cues can be printed with these methods to improve the extent and rate of targeted tissue regeneration. This review presents a comprehensive survey of 3D and 4D printing methods, and the advantage of their use in tissue regeneration over other scaffold production approaches.
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Affiliation(s)
- Dilara Goksu Tamay
- BIOMATEN, Center of Excellence in Biomaterials and Tissue Engineering, Middle East Technical University, Ankara, Turkey
- Department of Biotechnology, Middle East Technical University, Ankara, Turkey
| | - Tugba Dursun Usal
- BIOMATEN, Center of Excellence in Biomaterials and Tissue Engineering, Middle East Technical University, Ankara, Turkey
- Department of Biotechnology, Middle East Technical University, Ankara, Turkey
- Department of Biological Sciences, Middle East Technical University, Ankara, Turkey
| | - Ayse Selcen Alagoz
- BIOMATEN, Center of Excellence in Biomaterials and Tissue Engineering, Middle East Technical University, Ankara, Turkey
| | - Deniz Yucel
- BIOMATEN, Center of Excellence in Biomaterials and Tissue Engineering, Middle East Technical University, Ankara, Turkey
- Department of Histology and Embryology, School of Medicine, Acıbadem Mehmet Ali Aydinlar University, Istanbul, Turkey
| | - Nesrin Hasirci
- BIOMATEN, Center of Excellence in Biomaterials and Tissue Engineering, Middle East Technical University, Ankara, Turkey
- Department of Biotechnology, Middle East Technical University, Ankara, Turkey
- Department of Biomedical Engineering, Middle East Technical University, Ankara, Turkey
- Department of Chemistry, Middle East Technical University, Ankara, Turkey
| | - Vasif Hasirci
- BIOMATEN, Center of Excellence in Biomaterials and Tissue Engineering, Middle East Technical University, Ankara, Turkey
- Department of Biotechnology, Middle East Technical University, Ankara, Turkey
- Department of Biological Sciences, Middle East Technical University, Ankara, Turkey
- Department of Medical Engineering, School of Engineering, Acıbadem Mehmet Ali Aydinlar University, Istanbul, Turkey
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35
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Ranmuthu CDS, Ranmuthu CKI, Russell JC, Singhania D, Khan WS. Are the Biological and Biomechanical Properties of Meniscal Scaffolds Reflected in Clinical Practice? A Systematic Review of the Literature. Int J Mol Sci 2019; 20:ijms20030632. [PMID: 30717200 PMCID: PMC6386938 DOI: 10.3390/ijms20030632] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2018] [Revised: 01/18/2019] [Accepted: 01/18/2019] [Indexed: 12/14/2022] Open
Abstract
The aim of this PRISMA review was to assess whether the CMI and Actifit scaffolds, when used in clinical practice, improve clinical outcomes and demonstrate the ideal biological and biomechanical properties of scaffolds: being chondroprotective, porous, resorbable, able to mature and promote regeneration of tissue. This was done by only including studies that assessed clinical outcome and used a scale to assess both integrity of the scaffold and its effects on articular cartilage via MRI. A search was performed on PubMed, EMBASE, Scopus and clinicaltrials.gov. 2457 articles were screened, from which eight studies were selected: four used Actifit, three used CMI and one compared the two. All studies reported significant improvement in at least one clinical outcome compared to baseline. Some studies suggested that the scaffolds appeared to show porosity, mature, resorb and/or have possible chondroprotective effects, as assessed by MRI. The evidence for clinical translation is limited by differences in study methodology and small sample sizes, but is promising in terms of improving clinical outcomes in the short to mid-term. Higher level evidence, with MRI and histological evaluation of the scaffold and articular cartilage, is now needed to further determine whether these scaffolds exhibit these useful properties.
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Affiliation(s)
- Chanuka D S Ranmuthu
- School of Clinical Medicine, Addenbrooke's Hospital, University Of Cambridge, Cambridge CB2 0SP, UK.
| | - Charindu K I Ranmuthu
- School of Clinical Medicine, Addenbrooke's Hospital, University Of Cambridge, Cambridge CB2 0SP, UK.
| | - Jodie C Russell
- School of Clinical Medicine, Addenbrooke's Hospital, University Of Cambridge, Cambridge CB2 0SP, UK.
| | - Disha Singhania
- School of Clinical Medicine, Addenbrooke's Hospital, University Of Cambridge, Cambridge CB2 0SP, UK.
| | - Wasim S Khan
- Division of Trauma & Orthopaedic Surgery, Addenbrooke's Hospital, University of Cambridge, Cambridge CB2 0QQ, UK.
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Bahcecioglu G, Hasirci N, Bilgen B, Hasirci V. A 3D printed PCL/hydrogel construct with zone-specific biochemical composition mimicking that of the meniscus. Biofabrication 2019; 11:025002. [PMID: 30530944 DOI: 10.1088/1758-5090/aaf707] [Citation(s) in RCA: 65] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Engineering the meniscus is challenging due to its bizonal structure; the tissue is cartilaginous at the inner portion and fibrous at the outer portion. Here, we constructed an artificial meniscus mimicking the biochemical organization of the native tissue by 3D printing a meniscus shaped PCL scaffold and then impregnating it with agarose (Ag) and gelatin methacrylate (GelMA) hydrogels in the inner and outer regions, respectively. After incubating the constructs loaded with porcine fibrochondrocytes for 8 weeks, we demonstrated that presence of Ag enhanced glycosaminoglycan (GAG) production by about 4 fold (p < 0.001), while GelMA enhanced collagen production by about 50 fold (p < 0.001). In order to mimic the physiological loading environment, meniscus shaped PCL/hydrogel constructs were dynamically stimulated at strain levels gradually increasing from the outer region (2% of initial thickness) towards the inner region (10%). Incorporation of hydrogels protected the cells from the mechanical damage caused by dynamic stress. Dynamic stimulation resulted in increased ratio of collagen type II (COL 2) in the Ag-impregnated inner region (from 50% to 60% of total collagen), and increased ratio of collagen type I (COL 1) in the GelMA-impregnated outer region (from 60% to 70%). We were able to engineer a meniscus, which is cartilage-like at the inner portion and fibrocartilage-like at the outer portion. Our construct has a potential for use as a substitute for total meniscus replacement.
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Affiliation(s)
- Gokhan Bahcecioglu
- BIOMATEN, METU Center of Excellence in Biomaterials and Tissue Engineering, Middle East Technical University, Ankara, Turkey. Department of Biological Sciences, Middle East Technical University, Ankara, Turkey. Department of Biotechnology, Middle East Technical University, Ankara, Turkey
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