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Berasain J, Ávila-Fernández P, Cárdenas-Pérez R, Cànaves-Llabrés AI, Etayo-Escanilla M, Alaminos M, Carriel V, García-García ÓD, Chato-Astrain J, Campos F. Genipin crosslinking promotes biomechanical reinforcement and pro-regenerative macrophage polarization in bioartificial tubular substitutes. Biomed Pharmacother 2024; 174:116449. [PMID: 38518607 DOI: 10.1016/j.biopha.2024.116449] [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: 01/09/2024] [Revised: 03/07/2024] [Accepted: 03/15/2024] [Indexed: 03/24/2024] Open
Abstract
Traumatic nerve injuries are nowadays a significant clinical challenge and new substitutes with adequate biological and mechanical properties are in need. In this context, fibrin-agarose hydrogels (FA) have shown the possibility to generate tubular scaffolds with promising results for nerve repair. However, to be clinically viable, these scaffolds need to possess enhanced mechanical properties. In this line, genipin (GP) crosslinking has demonstrated to improve biomechanical properties with good biological properties compared to other crosslinkers. In this study, we evaluated the impact of different GP concentrations (0.05, 0.1 and 0.2% (m/v)) and reaction times (6, 12, 24, 72 h) on bioartificial nerve substitutes (BNS) consisting of nanostructured FA scaffolds. First, crosslinked BNS were studied histologically, ultrastructurally and biomechanically and then, its biocompatibility and immunomodulatory effects were ex vivo assessed with a macrophage cell line. Results showed that GP was able to improve the biomechanical resistance of BNS, which were dependent on both the GP treatment time and concentration without altering the structure. Moreover, biocompatibility analyses on macrophages confirmed high cell viability and a minimal reduction of their metabolic activity by WST-1. In addition, GP-crosslinked BNS effectively directed macrophage polarization from a pro-inflammatory (M1) towards a pro-regenerative (M2) phenotype, which was in line with the cytokines release profile. In conclusion, this study considers time and dose-dependent effects of GP in FA substitutes which exhibited increased biomechanical properties while reducing immunogenicity and promoting pro-regenerative macrophage shift. These tubular substitutes could be useful for nerve application or even other tissue engineering applications such as urethra.
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Affiliation(s)
- Jone Berasain
- Tissue Engineering Group, Department of Histology, Faculty of Medicine, University of Granada, Spain; Postgraduate Master Program in Tissue Engineering and Advanced Therapies, University of Granada, Spain
| | - Paula Ávila-Fernández
- Tissue Engineering Group, Department of Histology, Faculty of Medicine, University of Granada, Spain; Instituto de Investigación Biosanitaria ibs.GRANADA, Spain
| | - Rocío Cárdenas-Pérez
- Tissue Engineering Group, Department of Histology, Faculty of Medicine, University of Granada, Spain; Postgraduate Master Program in Tissue Engineering and Advanced Therapies, University of Granada, Spain
| | - Antoni Ignasi Cànaves-Llabrés
- Tissue Engineering Group, Department of Histology, Faculty of Medicine, University of Granada, Spain; Postgraduate Master Program in Tissue Engineering and Advanced Therapies, University of Granada, Spain
| | - Miguel Etayo-Escanilla
- Tissue Engineering Group, Department of Histology, Faculty of Medicine, University of Granada, Spain; Instituto de Investigación Biosanitaria ibs.GRANADA, Spain
| | - Miguel Alaminos
- Tissue Engineering Group, Department of Histology, Faculty of Medicine, University of Granada, Spain; Instituto de Investigación Biosanitaria ibs.GRANADA, Spain
| | - Víctor Carriel
- Tissue Engineering Group, Department of Histology, Faculty of Medicine, University of Granada, Spain; Instituto de Investigación Biosanitaria ibs.GRANADA, Spain
| | - Óscar Darío García-García
- Tissue Engineering Group, Department of Histology, Faculty of Medicine, University of Granada, Spain; Instituto de Investigación Biosanitaria ibs.GRANADA, Spain.
| | - Jesús Chato-Astrain
- Tissue Engineering Group, Department of Histology, Faculty of Medicine, University of Granada, Spain; Instituto de Investigación Biosanitaria ibs.GRANADA, Spain.
| | - Fernando Campos
- Tissue Engineering Group, Department of Histology, Faculty of Medicine, University of Granada, Spain; Instituto de Investigación Biosanitaria ibs.GRANADA, Spain
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Hameed H, Khan MA, Paiva-Santos AC, Ereej N, Faheem S. Chitin: A versatile biopolymer-based functional therapy for cartilage regeneration. Int J Biol Macromol 2024; 265:131120. [PMID: 38527680 DOI: 10.1016/j.ijbiomac.2024.131120] [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: 01/31/2024] [Revised: 03/11/2024] [Accepted: 03/21/2024] [Indexed: 03/27/2024]
Abstract
Chitin is the second most abundant biopolymer and its inherent biological characteristics make it ideal to use for tissue engineering. For many decades, its properties like non-toxicity, abundant availability, ease of modification, biodegradability, biocompatibility, and anti-microbial activity have made chitin an ideal biopolymer for drug delivery. Research studies have also shown many potential benefits of chitin in the formulation of functional therapy for cartilage regeneration. Chitin and its derivatives can be processed into 2D/3D scaffolds, hydrogels, films, exosomes, and nano-fibers, which make it a versatile and functional biopolymer in tissue engineering. Chitin is a biomimetic polymer that provides targeted delivery of mesenchymal stem cells, especially of chondrocytes at the injected donor sites to accelerate regeneration by enhancing cell proliferation and differentiation. Due to this property, chitin is considered an interesting polymer that has a high potential to provide targeted therapy in the regeneration of cartilage. Our paper presents an overview of the method of extraction, structure, properties, and functional role of this versatile biopolymer in tissue engineering, especially cartilage regeneration.
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Affiliation(s)
- Huma Hameed
- Faculty of Pharmaceutical Sciences, University of Central Punjab, Lahore 54000, Pakistan.
| | - Mahtab Ahmad Khan
- Faculty of Pharmaceutical Sciences, University of Central Punjab, Lahore 54000, Pakistan.
| | - Ana Cláudia Paiva-Santos
- Department of Pharmaceutical Technology, Faculty of Pharmacy of the University of Coimbra, University of Coimbra, 3000-548 Coimbra, Portugal; REQUIMTE/LAQV, Group of Pharmaceutical Technology, Faculty of Pharmacy of the University of Coimbra, University of Coimbra, 3000-548 Coimbra, Portugal.
| | - Nelofer Ereej
- Faculty of Pharmaceutical Sciences, University of Central Punjab, Lahore 54000, Pakistan.
| | - Saleha Faheem
- Faculty of Pharmaceutical Sciences, University of Central Punjab, Lahore 54000, Pakistan.
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Paul S, Schrobback K, Tran PA, Meinert C, Davern JW, Weekes A, Nedunchezhiyan U, Klein TJ. GelMA-glycol chitosan hydrogels for cartilage regeneration: The role of uniaxial mechanical stimulation in enhancing mechanical, adhesive, and biochemical properties. APL Bioeng 2023; 7:036114. [PMID: 37692373 PMCID: PMC10492648 DOI: 10.1063/5.0160472] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Accepted: 08/14/2023] [Indexed: 09/12/2023] Open
Abstract
Untreated osteochondral defects are a leading cause of osteoarthritis, a condition that places a heavy burden on both patients and orthopedic surgeons. Although tissue engineering has shown promise for creating mechanically similar cartilage-like constructs, their integration with cartilage remains elusive. Therefore, a formulation of biodegradable, biocompatible biomaterial with sufficient mechanical and adhesive properties for cartilage repair is required. To accomplish this, we prepared biocompatible, photo-curable, mechanically robust, and highly adhesive GelMA-glycol chitosan (GelMA-GC) hydrogels. GelMA-GC hydrogels had a modulus of 283 kPa and provided a biocompatible environment (>70% viability of embedded chondrocytes) in long-term culture within a bovine cartilage ring. The adhesive strength of bovine chondrocyte-laden GelMA-GC hydrogel to bovine cartilage increased from 38 to 52 kPa over four weeks of culture. Moreover, intermittent uniaxial mechanical stimulation enhanced the adhesive strength to ∼60 kPa, indicating that the cartilage-hydrogel integration could remain secure and functional under dynamic loading conditions. Furthermore, gene expression data and immunofluorescence staining revealed the capacity of chondrocytes in GelMA-GC hydrogel to synthesize chondrogenic markers (COL2A1 and ACAN), suggesting the potential for tissue regeneration. The promising in vitro results of this work motivate further exploration of the potential of photo-curable GelMA-GC bioadhesive hydrogels for cartilage repair and regeneration.
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Affiliation(s)
| | - Karsten Schrobback
- School of Biomedical Sciences, Centre for Genomics and Personalised Health, Translational Research Institute, Queensland University of Technology (QUT), 37 Kent Street, Woolloongabba, QLD 4102, Australia
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Lin M, Hu Y, An H, Guo T, Gao Y, Peng K, Zhao M, Zhang X, Zhou H. Silk fibroin-based biomaterials for disc tissue engineering. Biomater Sci 2023; 11:749-776. [PMID: 36537344 DOI: 10.1039/d2bm01343f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Low back pain is the major cause of disability worldwide, and intervertebral disc degeneration (IVDD) is one of the most important causes of low back pain. Currently, there is no method to treat IVDD that can reverse or regenerate intervertebral disc (IVD) tissue, but the recent development of disc tissue engineering (DTE) offers a new means of addressing these disadvantages. Among numerous biomaterials for tissue engineering, silk fibroin (SF) is widely used due to its easy availability and excellent physical/chemical properties. SF is usually used in combination with other materials to construct biological scaffolds or bioactive substance delivery systems, or it can be used alone. The present article first briefly outlines the anatomical and physiological features of IVD, the associated etiology and current treatment modalities of IVDD, and the current status of DTE. Then, it highlights the characteristics of SF biomaterials and their latest research advances in DTE and discusses the prospects and challenges in the application of SF in DTE, with a view to facilitating the clinical process of developing interventions related to IVD-derived low back pain caused by IVDD.
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Affiliation(s)
- Maoqiang Lin
- Department of Orthopedics, Lanzhou University Second Hospital, Lanzhou 730030, Gansu, China. .,Key Laboratory of Bone and Joint Disease Research of Gansu Province, Lanzhou 730030, Gansu, China
| | - Yicun Hu
- Department of Orthopedics, Lanzhou University Second Hospital, Lanzhou 730030, Gansu, China. .,Key Laboratory of Bone and Joint Disease Research of Gansu Province, Lanzhou 730030, Gansu, China
| | - Haiying An
- Department of Laboratory Medicine, Zhongnan Hospital, Wuhan University, Wuhan 430000, Hubei, China
| | - Taowen Guo
- Department of Orthopedics, Lanzhou University Second Hospital, Lanzhou 730030, Gansu, China. .,Key Laboratory of Bone and Joint Disease Research of Gansu Province, Lanzhou 730030, Gansu, China
| | - Yanbing Gao
- Department of Orthopedics, Lanzhou University Second Hospital, Lanzhou 730030, Gansu, China. .,Key Laboratory of Bone and Joint Disease Research of Gansu Province, Lanzhou 730030, Gansu, China
| | - Kaichen Peng
- Department of Orthopedics, Lanzhou University Second Hospital, Lanzhou 730030, Gansu, China. .,Key Laboratory of Bone and Joint Disease Research of Gansu Province, Lanzhou 730030, Gansu, China
| | - Meiling Zhao
- Key Laboratory of Bone and Joint Disease Research of Gansu Province, Lanzhou 730030, Gansu, China
| | - Xiaobo Zhang
- Department of Orthopedics, Honghui Hospital, Xi'an Jiaotong University, Xi'an 710000, Shaanxi, China.
| | - Haiyu Zhou
- Department of Orthopedics, Lanzhou University Second Hospital, Lanzhou 730030, Gansu, China. .,Key Laboratory of Bone and Joint Disease Research of Gansu Province, Lanzhou 730030, Gansu, China
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Kawamura T, Yunoki S, Ohyabu Y, Uraoka T, Muramatsu K. Crosslinking Efficacy and Cytotoxicity of Genipin and Its Activated Form Prepared by Warming It in a Phosphate Buffer: A Comparative Study. MATERIALS 2021; 14:ma14216600. [PMID: 34772122 PMCID: PMC8585344 DOI: 10.3390/ma14216600] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 10/24/2021] [Accepted: 10/26/2021] [Indexed: 01/14/2023]
Abstract
The aim of the present study was to compare the acute and cumulative cytotoxicity of intact (n-GE) and warmed genipin (w-GE), while investigating the differences in crosslinking capabilities of these two genipins by rheological and mechanical tests. The n-GE solution was prepared by dissolving genipin powder in a sodium phosphate buffer solution. The w-GE solution was prepared by warming the n-GE solution at 37 °C for 24 h. The mechanical tests for chitosan (CH)/genipin gels showed the crosslinking rate of w-GE was much greater than that of n-GE up until 6 h after preparation, whereas the degree of crosslinking of CH/n-GE gels became higher at 12 h. The ISO 10993-5 standard method, which is established specifically for evaluating cumulative cytotoxicity, determined equivalent IC50 for w-GE (0.173 mM) and n-GE (0.166 mM). On the other hand, custom-made cytotoxicity tests using a WST-8 assay after 1 h of cultivation showed that the acute cytotoxicity of w-GE was significantly higher than that of n-GE at concentrations between 0.1–5 mM. The acute cytotoxicity of w-GE should be taken into consideration in its practical uses, despite the fact that the much faster crosslinking of w-GE is useful as an effective cross linker for in-situ forming gels.
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Affiliation(s)
- Takeya Kawamura
- Biotechnology Group, Tokyo Metropolitan Industrial Technology Research Institute (TIRI), 2-4-10 Aomi, Koto-ku, Tokyo 135-0064, Japan; (T.K.); (Y.O.)
- School of Science and Engineering, Tokyo Denki University, Ishizaka, Hatoyama-cho, Hiki-gun 350-0394, Japan;
| | - Shunji Yunoki
- Biotechnology Group, Tokyo Metropolitan Industrial Technology Research Institute (TIRI), 2-4-10 Aomi, Koto-ku, Tokyo 135-0064, Japan; (T.K.); (Y.O.)
- Correspondence:
| | - Yoshimi Ohyabu
- Biotechnology Group, Tokyo Metropolitan Industrial Technology Research Institute (TIRI), 2-4-10 Aomi, Koto-ku, Tokyo 135-0064, Japan; (T.K.); (Y.O.)
| | - Toshio Uraoka
- Department of Gastroenterology and Hepatology, Gunma University School of Medicine, 3-39-22 Showa-machi, Maebashi 371-8514, Japan;
| | - Kazuaki Muramatsu
- School of Science and Engineering, Tokyo Denki University, Ishizaka, Hatoyama-cho, Hiki-gun 350-0394, Japan;
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Karabıyık Acar Ö, Bedir S, Kayitmazer AB, Kose GT. Chondro-inductive hyaluronic acid/chitosan coacervate-based scaffolds for cartilage tissue engineering. Int J Biol Macromol 2021; 188:300-312. [PMID: 34358603 DOI: 10.1016/j.ijbiomac.2021.07.176] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Revised: 07/22/2021] [Accepted: 07/27/2021] [Indexed: 12/15/2022]
Abstract
Injuries related to articular cartilage are among the most challenging musculoskeletal problems because of poor repair capacity of this tissue. The lack of efficient treatments for chondral defects has stimulated research on cartilage tissue engineering applications combining porous biocompatible scaffolds with stem cells in the presence of external stimuli. This work presents the role of rat bone marrow mesenchymal stem cell (BMSC) encapsulated-novel three-dimensional (3D) coacervate scaffolds prepared through complex coacervation between different chitosan salts (CHI) and sodium hyaluronate (HA). The 3D architecture of BMSC encapsulated scaffolds (HA/CHI) was shown by scanning electron microscopy (SEM) to have an interconnected structure to allow cell-cell and cell-matrix interactions. Chondrogenic induction of encapsulated BMSCs within HA/CHI coacervates demonstrated remarkable cellular viability in addition to the elevated expression levels of chondrogenic markers such as sex determining region Y-box 9 protein (SOX9), aggrecan (ACAN), cartilage oligomeric matrix protein (COMP) and collagen type II (COL2A1) by immunofluorescence staining, qPCR and ELISA test. Collectively, HA/CHI coacervates are promising candidates for future use of these scaffolds in cartilage tissue engineering applications.
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Affiliation(s)
- Özge Karabıyık Acar
- Department of Genetics and Bioengineering, Faculty of Engineering, Yeditepe University, Istanbul, Turkey.
| | - Seden Bedir
- Department of Genetics and Bioengineering, Faculty of Engineering, Yeditepe University, Istanbul, Turkey
| | | | - Gamze Torun Kose
- Department of Genetics and Bioengineering, Faculty of Engineering, Yeditepe University, Istanbul, Turkey.
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Ali MA, Gould M. Untapped potentials of hazardous nanoarchitectural biopolymers. JOURNAL OF HAZARDOUS MATERIALS 2021; 411:124740. [PMID: 33476911 DOI: 10.1016/j.jhazmat.2020.124740] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 08/24/2020] [Accepted: 11/28/2020] [Indexed: 06/12/2023]
Abstract
The First Industrial Revolution began when manual labour transitioned to machines. Fossil fuels and steam eventually replaced wood and water as an energy source used predominantly for the mechanized production of textiles and iron. The emergence of the required numerous enormous factories gave rise to smoke pollution due to the immense growth in coal consumption. The manufactured gas industry produced highly toxic effluent that was released into sewers and rivers polluting the water. Many pieces of legislation were introduced to overcome this issue, but with varying degrees of effectiveness. Alongside our growth in world population, the problems that we had with waste remained, but together with our increase in number the waste produced has also increased additionally. The immense volume of waste materials generated from human activity and the potentially detrimental effects on the environment and on public health have awakened in ourselves a critical need to embrace current scientific methods for the safe disposal of wastes. We are informed daily that our food waste must be better utilized to ensure enough food is available to feed the world's growing population in a sustainable way (Thyberg and Tonjes, 2016). Some things are easy, like waste food and cellulose products can be turned into compost, but how do we recycle sheep's wool? Or shrimp shells? Despite the fact that both these substances are hazardous, and have caused environmental and economic impact from being incinerated; but we anticipate that those substances may have the potential to convert into added value applications.We have been working in this area for over 15 years, working towards managing them and seeking their added value applications. We take the biological products, process (reconstitute) and engineer them into added value products such as functional and nanostructure materials including edible films, foams and composites including medical devices useful in the human body. Anything that we can ingest, should not cause an immune response in the human system. Natural biomacromolecules display the inherent ability to perform very specific chemical, mechanical or structural roles. Specifically, protein- and polysaccharide-based biomaterials have come to light as the most promising candidates for many biomedical applications due their biomimetic and nanostructured arrangements, their multi-functional features, and their capability to function as matrices that are capable of facilitating cell-cell and cell-matrix interactions.
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Affiliation(s)
- M Azam Ali
- Department of Food Science, Centre for Bioengineering and Nanomedicine, University of Otago, PO Box 56, Dunedin 9054, New Zealand.
| | - Maree Gould
- Department of Food Science, Centre for Bioengineering and Nanomedicine, University of Otago, PO Box 56, Dunedin 9054, New Zealand
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Xu G, Meng X, Guan J, Xing Y, Feng Z, Hai Y. Systematic review of intervertebral disc repair: a bibliometric analysis of the 100 most-cited articles. J Orthop Surg Res 2021; 16:207. [PMID: 33752710 PMCID: PMC7983369 DOI: 10.1186/s13018-021-02303-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Accepted: 02/14/2021] [Indexed: 12/04/2022] Open
Abstract
Study design A bibliometric review of the literature. Objective To identify the most frequently cited articles relating to the repair of intervertebral disc (IVD) and to summarize the key points and findings of these highly cited works, to quantify their impact on the developments of the disc disease treatment. Summary of background data IVD repair is an ever-growing and multi-disciplinary innovating treatment method for disc diseases. There are numerous literatures and related studies about it, promoting the development of the field. A comprehensive review and analysis of the most influential articles can help clarify the most effective strategy of IVD repair, and discover the promising directions for future research. Methods The Thomson Reuters Web of Knowledge was searched for citations of all literatures relevant to IVD repair. The number of citations, key points, categories, authorships, years, journals, countries, and institutions of publications were analyzed. Results The most highly cited articles in IVD Repair were published over 30 years, between 1991 and 2017. Most works (No. 41) were published between 2005 and 2009. The most-cited article was Sakai’s 2003 article which described the possibility of combining MSC and gel to repair IVD. The three most popular categories involved were Orthopedics [44], Clinical Neurology [34], Engineering, and Biomedical [24]. The three most common topics were regenerative medicine and the progenitor cells [33], biomaterials and cellular scaffolds [29], application of growth factors [25]. Author Masuda and the partners have 4 articles in the top 100 list. The Rush University has 12 articles in the top 100 list. Conclusion This report identifies the top 100 articles in IVD repair and acknowledges those individuals who have contributed the most to the study of the IVD repair and the body of knowledge used to the repair strategy making. It allows insight into the trends of this innovative and interdisciplinary subspecialty of spine surgery.
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Affiliation(s)
- Gang Xu
- Beijing Chao-yang Hospital, Capital Medical University, 8 Gongren Tiyuchang Nanlu, Chaoyang District, Beijing, 100020, China
| | - Xianglong Meng
- Beijing Chao-yang Hospital, Capital Medical University, 8 Gongren Tiyuchang Nanlu, Chaoyang District, Beijing, 100020, China.
| | - Juan Guan
- International Research Center for Advanced Structural and Biomaterials, School of Materials Science and Engineering, Beihang University, Beijing, 100191, China
| | - Yaozhong Xing
- Beijing Chao-yang Hospital, Capital Medical University, 8 Gongren Tiyuchang Nanlu, Chaoyang District, Beijing, 100020, China
| | - Zihe Feng
- Beijing Chao-yang Hospital, Capital Medical University, 8 Gongren Tiyuchang Nanlu, Chaoyang District, Beijing, 100020, China
| | - Yong Hai
- Beijing Chao-yang Hospital, Capital Medical University, 8 Gongren Tiyuchang Nanlu, Chaoyang District, Beijing, 100020, China
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Erickson C, Stager M, Riederer M, Payne KA, Krebs M. Emulsion-free chitosan-genipin microgels for growth plate cartilage regeneration. J Biomater Appl 2021; 36:289-296. [PMID: 33709832 DOI: 10.1177/0885328221999894] [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] [Indexed: 11/17/2022]
Abstract
The growth plate is a cartilage tissue near the ends of children's long bones and is responsible for bone growth. Injury to the growth plate can result in the formation of a 'bony bar' which can span the growth plate and result in bone growth abnormalities in children. Biomaterials such as chitosan microgels could be a potential treatment for growth plate injuries due to their chondrogenic properties, which can be enhanced through loading with biologics. They are commonly fabricated via an emulsion method, which involves solvent rinses that are cytotoxic. Here, we present a high throughput, non-cytotoxic, non-emulsion-based method to fabricate chitosan-genipin microgels. Chitosan was crosslinked with genipin to form a hydrogel network, and then pressed through a syringe filter using mesh with various pore sizes to produce a range of microgel particle sizes. The microgels were then loaded with chemokines and growth factors and their release was studied in vitro. To assess the applicability of the microgels for growth plate cartilage regeneration, they were injected into a rat growth plate injury. They led to increased cartilage repair tissue and were fully degraded by 28 days in vivo. This work demonstrates that chitosan microgels can be fabricated without solvent rinses and demonstrates their potential for the treatment of growth plate injuries.
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Affiliation(s)
| | | | | | - Karin A Payne
- University of Colorado Anschutz Medical Campus, Aurora, CO, USA
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10
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Advances in chitosan-based hydrogels: Evolution from covalently crosslinked systems to ionotropically crosslinked superabsorbents. REACT FUNCT POLYM 2020. [DOI: 10.1016/j.reactfunctpolym.2020.104517] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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Shi K, Huang Y, Huang L, Wang J, Wang Y, Feng G, Liu L, Song Y. [Research progress of hydrogel used for regeneration of nucleus pulposus in intervertebral disc degeneration]. ZHONGGUO XIU FU CHONG JIAN WAI KE ZA ZHI = ZHONGGUO XIUFU CHONGJIAN WAIKE ZAZHI = CHINESE JOURNAL OF REPARATIVE AND RECONSTRUCTIVE SURGERY 2020; 34:275-284. [PMID: 32174070 DOI: 10.7507/1002-1892.201907092] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Objective To summarize the research progress of hydrogels for the regeneration and repair of degenerative intervertebral disc and to investigate the potential of hydrogels in clinical application. Methods The related literature about the role of hydrogels in intervertebral disc degeneration especially for nucleus pulposus was reviewed and analyzed. Results Hydrogels share similar properties with nucleus pulposus, and it plays an important role in the regeneration and repair of degenerative intervertebral disc, which can be mainly applied in nucleus pulposus prosthesis, hydrogel-based cell therapy, non-cellular therapy, and tissue engineering repair. Conclusion Hydrogels are widely used in the regeneration and repair of intervertebral disc, which provides a potential treatment for intervertebral disc degeneration.
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Affiliation(s)
- Kun Shi
- Departmen of Orthopedics, West China Hospital, Sichuan University, Chengdu Sichuan, 610041, P.R.China
| | - Yong Huang
- Departmen of Orthopedics, West China Hospital, Sichuan University, Chengdu Sichuan, 610041, P.R.China
| | - Leizhen Huang
- Departmen of Orthopedics, West China Hospital, Sichuan University, Chengdu Sichuan, 610041, P.R.China
| | - Jingcheng Wang
- Departmen of Orthopedics, West China Hospital, Sichuan University, Chengdu Sichuan, 610041, P.R.China
| | - Yuhan Wang
- Departmen of Orthopedics, West China Hospital, Sichuan University, Chengdu Sichuan, 610041, P.R.China
| | - Ganjun Feng
- Departmen of Orthopedics, West China Hospital, Sichuan University, Chengdu Sichuan, 610041, P.R.China
| | - Limin Liu
- Departmen of Orthopedics, West China Hospital, Sichuan University, Chengdu Sichuan, 610041, P.R.China
| | - Yueming Song
- Departmen of Orthopedics, West China Hospital, Sichuan University, Chengdu Sichuan, 610041, P.R.China
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Frapin L, Clouet J, Delplace V, Fusellier M, Guicheux J, Le Visage C. Lessons learned from intervertebral disc pathophysiology to guide rational design of sequential delivery systems for therapeutic biological factors. Adv Drug Deliv Rev 2019; 149-150:49-71. [PMID: 31445063 DOI: 10.1016/j.addr.2019.08.007] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Revised: 08/05/2019] [Accepted: 08/18/2019] [Indexed: 12/20/2022]
Abstract
Intervertebral disc (IVD) degeneration has been associated with low back pain, which is a major musculoskeletal disorder and socio-economic problem that affects as many as 600 million patients worldwide. Here, we first review the current knowledge of IVD physiology and physiopathological processes in terms of homeostasis regulation and consecutive events that lead to tissue degeneration. Recent progress with IVD restoration by anti-catabolic or pro-anabolic approaches are then analyzed, as are the design of macro-, micro-, and nano-platforms to control the delivery of such therapeutic agents. Finally, we hypothesize that a sequential delivery strategy that i) firstly targets the inflammatory, pro-catabolic microenvironment with release of anti-inflammatory or anti-catabolic cytokines; ii) secondly increases cell density in the less hostile microenvironment by endogenous cell recruitment or exogenous cell injection, and finally iii) enhances cellular synthesis of extracellular matrix with release of pro-anabolic factors, would constitute an innovative yet challenging approach to IVD regeneration.
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Alinejad Y, Adoungotchodo A, Grant MP, Epure LM, Antoniou J, Mwale F, Lerouge S. Injectable Chitosan Hydrogels with Enhanced Mechanical Properties for Nucleus Pulposus Regeneration. Tissue Eng Part A 2019; 25:303-313. [DOI: 10.1089/ten.tea.2018.0170] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Affiliation(s)
- Yasaman Alinejad
- Laboratory of Endovascular Biomaterials (LBeV), Centre de Recherche du CHUM (CRCHUM), Montreal, Canada
- Department of Mechanical Engineering, École de Technologie Supérieure (ETS), Montreal, Canada
- Lady Davis Institute for Medical Research, SMBD-Jewish General Hospital, Montreal, Canada
| | - Atma Adoungotchodo
- Laboratory of Endovascular Biomaterials (LBeV), Centre de Recherche du CHUM (CRCHUM), Montreal, Canada
- Department of Mechanical Engineering, École de Technologie Supérieure (ETS), Montreal, Canada
- Lady Davis Institute for Medical Research, SMBD-Jewish General Hospital, Montreal, Canada
| | - Michael P. Grant
- Lady Davis Institute for Medical Research, SMBD-Jewish General Hospital, Montreal, Canada
| | - Laura M. Epure
- Lady Davis Institute for Medical Research, SMBD-Jewish General Hospital, Montreal, Canada
| | - John Antoniou
- Lady Davis Institute for Medical Research, SMBD-Jewish General Hospital, Montreal, Canada
- Division of Orthopaedic Surgery, McGill University, Montreal, Canada
| | - Fackson Mwale
- Lady Davis Institute for Medical Research, SMBD-Jewish General Hospital, Montreal, Canada
- Division of Orthopaedic Surgery, McGill University, Montreal, Canada
| | - Sophie Lerouge
- Laboratory of Endovascular Biomaterials (LBeV), Centre de Recherche du CHUM (CRCHUM), Montreal, Canada
- Department of Mechanical Engineering, École de Technologie Supérieure (ETS), Montreal, Canada
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An injectable chitosan/chondroitin sulfate hydrogel with tunable mechanical properties for cell therapy/tissue engineering. Int J Biol Macromol 2018; 113:132-141. [DOI: 10.1016/j.ijbiomac.2018.02.069] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Revised: 02/08/2018] [Accepted: 02/11/2018] [Indexed: 01/06/2023]
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15
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Cruz MA, McAnany S, Gupta N, Long RG, Nasser P, Eglin D, Hecht AC, Illien-Junger S, Iatridis JC. Structural and Chemical Modification to Improve Adhesive and Material Properties of Fibrin-Genipin for Repair of Annulus Fibrosus Defects in Intervertebral Disks. J Biomech Eng 2018; 139:2625781. [PMID: 28464119 DOI: 10.1115/1.4036623] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2016] [Indexed: 01/07/2023]
Abstract
Annulus fibrosus (AF) defects from intervertebral disk (IVD) herniation and degeneration are commonly associated with back pain. Genipin-crosslinked fibrin hydrogel (FibGen) is an injectable, space-filling AF sealant that was optimized to match AF shear properties and partially restored IVD biomechanics. This study aimed to enhance mechanical behaviors of FibGen to more closely match AF compressive, tensile, and shear properties by adjusting genipin crosslink density and by creating a composite formulation by adding Poly(D,L-lactide-co-glycolide) (PDLGA). This study also evaluated effects of thrombin concentration and injection technique on gelation kinetics and adhesive strength. Increasing FibGen genipin concentration from 1 to 36 mg/mL significantly increased adhesive strength (∼5 to 35 kPa), shear moduli (∼10 to 110 kPa), and compressive moduli (∼25 to 150 kPa) with concentration-dependent effects, and spanning native AF properties. Adding PDLGA to FibGen altered the material microstructure on electron microscopy and nearly tripled adhesive strength, but did not increase tensile moduli, which remained nearly 5× below native AF, and had a small increase in shear moduli and significantly decreased compressive moduli. Increased thrombin concentration decreased gelation rate to < 5 min and injection methods providing a structural FibGen cap increased pushout strength by ∼40%. We conclude that FibGen is highly modifiable with tunable mechanical properties that can be formulated to be compatible with human AF compressive and shear properties and gelation kinetics and injection techniques compatible with clinical discectomy procedures. However, further innovations, perhaps with more efficient fiber reinforcement, will be required to enable FibGen to match AF tensile properties.
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Affiliation(s)
- Michelle A Cruz
- Leni and Peter W. May Department of Orthopaedics, Icahn School of Medicine at Mount Sinai, One Gustave L. Levy Place, Box 1188, New York, NY 10029
| | - Steven McAnany
- Leni and Peter W. May Department of Orthopaedics, Icahn School of Medicine at Mount Sinai, One Gustave L. Levy Place, Box 1188, New York, NY 10029
| | - Nikita Gupta
- Department of Otolaryngology, Icahn School of Medicine at Mount Sinai, One Gustave L. Levy Place, Box 1189, New York, NY 10029
| | - Rose G Long
- Leni and Peter W. May Department of Orthopaedics, Icahn School of Medicine at Mount Sinai, One Gustave L. Levy Place, Box 1188, New York, NY 10029
| | - Philip Nasser
- Leni and Peter W. May Department of Orthopaedics, Icahn School of Medicine at Mount Sinai, One Gustave L. Levy Place, Box 1188, New York, NY 10029
| | - David Eglin
- Biomaterials and Tissue Engineering, AO Research Institute Davos, Davos CH-7270, Switzerland
| | - Andrew C Hecht
- Leni and Peter W. May Department of Orthopaedics, Icahn School of Medicine at Mount Sinai, One Gustave L. Levy Place, Box 1188, New York, NY 10029
| | - Svenja Illien-Junger
- Leni and Peter W. May Department of Orthopaedics, Icahn School of Medicine at Mount Sinai, One Gustave L. Levy Place, Box 1188, New York, NY 10029
| | - James C Iatridis
- Leni and Peter W. May Department of Orthopaedics, Icahn School of Medicine at Mount Sinai, One Gustave L. Levy Place, Box 1188, New York, NY 10029 e-mail:
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Campos F, Bonhome-Espinosa AB, Vizcaino G, Rodriguez IA, Duran-Herrera D, López-López MT, Sánchez-Montesinos I, Alaminos M, Sánchez-Quevedo MC, Carriel V. Generation of genipin cross-linked fibrin-agarose hydrogel tissue-like models for tissue engineering applications. ACTA ACUST UNITED AC 2018; 13:025021. [PMID: 29420310 DOI: 10.1088/1748-605x/aa9ad2] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The generation of biomimetic and biocompatible artificial tissues is the basic research objective for tissue engineering (TE). In this sense, the biofabrication of scaffolds that resemble the tissues' extracellular matrix is an essential aim in this field. Uncompressed and nanostructured fibrin-agarose hydrogels (FAH and NFAH, respectively) have emerged as promising scaffolds in TE, but their structure and biomechanical properties must be improved in order to broaden their TE applications. Here, we generated and characterized novel membrane-like models with increased structural and biomechanical properties based on the chemical cross-linking of FAH and NFAH with genipin (GP at 0.1%, 0.25%, 0.5% and 0.75%). Furthermore, the scaffolds were subjected to rheological (G, G', G″ modulus), ultrastructural and ex vivo biocompatibility analyses. Results showed that all GP concentrations increased the stiffness (G) and especially the elasticity (G') of FAH and NFAH. Ultrastructural analyses demonstrated that GP and nanostructuration of FAH allowed us to control the porosity of FAH. In addition, biological studies revealed that higher concentration of GP (0.75%) started to compromise the cell function and viability. Finally, this study demonstrated the possibility to generate natural and biocompatible FAH and NFAH with improved structural and biomechanical properties by using 0.1%-0.5% of GP. However, further in vivo studies are needed in order to demonstrate the biocompatibility, biodegradability and regeneration capability of these cross-linked scaffolds.
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Affiliation(s)
- Fernando Campos
- Department of Histology, Tissue Engineering Group, Faculty of Medicine, University of Granada and Instituto de Investigación Biosanitaria Ibs.GRANADA, Spain
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Chitosan-Cellulose Multifunctional Hydrogel Beads: Design, Characterization and Evaluation of Cytocompatibility with Breast Adenocarcinoma and Osteoblast Cells. Bioengineering (Basel) 2018; 5:bioengineering5010003. [PMID: 29315214 PMCID: PMC5874869 DOI: 10.3390/bioengineering5010003] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Revised: 01/05/2018] [Accepted: 01/05/2018] [Indexed: 11/20/2022] Open
Abstract
Cytocompatible polysaccharide-based functional scaffolds are potential extracellular matrix candidates for soft and hard tissue engineering. This paper describes a facile approach to design cytocompatible, non-toxic, and multifunctional chitosan-cellulose based hydrogel beads utilising polysaccharide dissolution in sodium hydroxide-urea-water solvent system and coagulation under three different acidic conditions, namely 2 M acetic acid, 2 M hydrochloric acid, and 2 M sulfuric acid. The effect of coagulating medium on the final chemical composition of the hydrogel beads is investigated by spectroscopic techniques (ATR–FTIR, Raman, NMR), and elemental analysis. The beads coagulated in 2 M acetic acid displayed an unchanged chitosan composition with free amino groups, while the beads coagulated in 2 M hydrochloric and sulfuric acid showed protonation of amino groups and ionic interaction with the counterions. The ultrastructural morphological study of lyophilized beads showed that increased chitosan content enhanced the porosity of the hydrogel beads. Furthermore, cytocompatibility evaluation of the hydrogel beads with human breast adenocarcinoma cells (soft tissue) showed that the beads coagulated in 2 M acetic acid are the most suitable for this type of cells in comparison to other coagulating systems. The acetic acid fabricated hydrogel beads also support osteoblast growth and adhesion over 192 h. Thus, in future, these hydrogel beads can be tested in the in vitro studies related to breast cancer and for bone regeneration.
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Clinical Applications of Injectable Biomaterials. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 1077:163-182. [DOI: 10.1007/978-981-13-0947-2_10] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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19
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Heterocycles of Natural Origin as Non-Toxic Reagents for Cross-Linking of Proteins and Polysaccharides. Chem Heterocycl Compd (N Y) 2017. [DOI: 10.1007/s10593-017-2016-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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20
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Challenges for Cartilage Regeneration. SPRINGER SERIES IN BIOMATERIALS SCIENCE AND ENGINEERING 2017. [DOI: 10.1007/978-3-662-53574-5_14] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Vadalà G, Russo F, Ambrosio L, Loppini M, Denaro V. Stem cells sources for intervertebral disc regeneration. World J Stem Cells 2016; 8:185-201. [PMID: 27247704 PMCID: PMC4877563 DOI: 10.4252/wjsc.v8.i5.185] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/30/2015] [Revised: 12/18/2015] [Accepted: 02/16/2016] [Indexed: 02/06/2023] Open
Abstract
Intervertebral disc regeneration field is rapidly growing since disc disorders represent a major health problem in industrialized countries with very few possible treatments. Indeed, current available therapies are symptomatic, and surgical procedures consist in disc removal and spinal fusion, which is not immune to regardable concerns about possible comorbidities, cost-effectiveness, secondary risks and long-lasting outcomes. This review paper aims to share recent advances in stem cell therapy for the treatment of intervertebral disc degeneration. In literature the potential use of different adult stem cells for intervertebral disc regeneration has already been reported. Bone marrow mesenchymal stromal/stem cells, adipose tissue derived stem cells, synovial stem cells, muscle-derived stem cells, olfactory neural stem cells, induced pluripotent stem cells, hematopoietic stem cells, disc stem cells, and embryonic stem cells have been studied for this purpose either in vitro or in vivo. Moreover, several engineered carriers (e.g., hydrogels), characterized by full biocompatibility and prompt biodegradation, have been designed and combined with different stem cell types in order to optimize the local and controlled delivery of cellular substrates in situ. The paper overviews the literature discussing the current status of our knowledge of the different stem cells types used as a cell-based therapy for disc regeneration.
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Zhang Y, Wang QS, Yan K, Qi Y, Wang GF, Cui YL. Preparation, characterization, and evaluation of genipin crosslinked chitosan/gelatin three-dimensional scaffolds for liver tissue engineering applications. J Biomed Mater Res A 2016; 104:1863-70. [DOI: 10.1002/jbm.a.35717] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2015] [Revised: 02/22/2016] [Accepted: 03/11/2016] [Indexed: 11/06/2022]
Affiliation(s)
- Yi Zhang
- Tianjin State Key Laboratory of Modern Chinese Medicine; Research Center of Traditional Chinese Medicine, Tianjin University of Traditional Chinese Medicine; Tianjin 300193 People's Republic of China
| | - Qiang-Song Wang
- Tianjin Key Laboratory of Biomedical Materials; Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union Medical College; Tianjin 300192 People's Republic of China
| | - Kuo Yan
- Tianjin State Key Laboratory of Modern Chinese Medicine; Research Center of Traditional Chinese Medicine, Tianjin University of Traditional Chinese Medicine; Tianjin 300193 People's Republic of China
| | - Yun Qi
- Faculty of Environmental Science and Engineering; Tianjin University; Tianjin 300072 People's Republic of China
| | - Gui-Fang Wang
- Tianjin State Key Laboratory of Modern Chinese Medicine; Research Center of Traditional Chinese Medicine, Tianjin University of Traditional Chinese Medicine; Tianjin 300193 People's Republic of China
| | - Yuan-Lu Cui
- Tianjin State Key Laboratory of Modern Chinese Medicine; Research Center of Traditional Chinese Medicine, Tianjin University of Traditional Chinese Medicine; Tianjin 300193 People's Republic of China
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McGann ME, Bonitsky CM, Jackson ML, Ovaert TC, Trippel SB, Wagner DR. Genipin crosslinking of cartilage enhances resistance to biochemical degradation and mechanical wear. J Orthop Res 2015; 33:1571-1579. [PMID: 25939430 PMCID: PMC4591111 DOI: 10.1002/jor.22939] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/02/2015] [Accepted: 04/29/2015] [Indexed: 02/04/2023]
Abstract
Collagen crosslinking enhances many beneficial properties of articular cartilage, including resistance to chemical degradation and mechanical wear, but many crosslinking agents are cytotoxic. The purpose of this study was to evaluate the effectiveness of genipin, a crosslinking agent with favorable biocompatibility and cytotoxicity, as a potential treatment to prevent the degradation and wear of articular cartilage. First, the impact of genipin concentration and treatment duration on the viscoelastic properties of bovine articular cartilage was quantified. Next, two short-term (15 min) genipin crosslinking treatments were chosen, and the change in collagenase digestion, cartilage wear, and the friction coefficient of the tissue with these treatments was measured. Finally, chondrocyte viability after exposure to these genipin treatments was assessed. Genipin treatment increased the stiffness of healthy, intact cartilage in a dose-dependent manner. The 15-min crosslinking treatments improved cartilage's resistance to both chemical degradation, particularly at the articular surface, and to damage due to mechanical wear. These enhancements were achieved without sacrificing the low coefficient of friction of the tissue and at a genipin dose that preserved chondrocyte viability. The results of this study suggest that collagen crosslinking via genipin may be a promising preventative treatment to slow the degradation of cartilage.
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Affiliation(s)
- Megan E. McGann
- Department of Aerospace and Mechanical Engineering, University of Notre Dame
| | - Craig M. Bonitsky
- Department of Aerospace and Mechanical Engineering, University of Notre Dame
| | - Mariah L. Jackson
- Department of Aerospace and Mechanical Engineering, University of Notre Dame
| | - Timothy C. Ovaert
- Department of Aerospace and Mechanical Engineering, University of Notre Dame
| | | | - Diane R. Wagner
- Department of Aerospace and Mechanical Engineering, University of Notre Dame
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Liu IH, Chang SH, Lin HY. Chitosan-based hydrogel tissue scaffolds made by 3D plotting promotes osteoblast proliferation and mineralization. Biomed Mater 2015; 10:035004. [DOI: 10.1088/1748-6041/10/3/035004] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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25
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Blanquer SBG, Grijpma DW, Poot AA. Delivery systems for the treatment of degenerated intervertebral discs. Adv Drug Deliv Rev 2015; 84:172-87. [PMID: 25451138 DOI: 10.1016/j.addr.2014.10.024] [Citation(s) in RCA: 81] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2014] [Revised: 08/29/2014] [Accepted: 10/20/2014] [Indexed: 12/25/2022]
Abstract
The intervertebral disc (IVD) is the most avascular and acellular tissue in the body and therefore prone to degeneration. During IVD degeneration, the balance between anabolic and catabolic processes in the disc is deregulated, amongst others leading to alteration of extracellular matrix production, abnormal enzyme activities and production of pro-inflammatory substances like cytokines. The established treatment strategy for IVD degeneration consists of physiotherapy, pain medication by drug therapy and if necessary surgery. This approach, however, has shown limited success. Alternative strategies to increase and prolong the effects of bioactive agents and to reverse the process of IVD degeneration include the use of delivery systems for drugs, proteins, cells and genes. In view of the specific anatomy and physiology of the IVD and depending on the strategy of the therapy, different delivery systems have been developed which are reviewed in this article.
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Affiliation(s)
- S B G Blanquer
- MIRA Institute for Biomedical Technology and Technical Medicine, Department of Biomaterials Science and Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands; Collaborative Research Partner Annulus Fibrosus Rupture Program of AO Foundation, Davos, Switzerland
| | - D W Grijpma
- MIRA Institute for Biomedical Technology and Technical Medicine, Department of Biomaterials Science and Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands; Collaborative Research Partner Annulus Fibrosus Rupture Program of AO Foundation, Davos, Switzerland; University of Groningen, University Medical Center Groningen, W.J. Kolff Institute, Department of Biomedical Engineering, P.O. Box 196, 9700 AD Groningen, The Netherlands.
| | - A A Poot
- MIRA Institute for Biomedical Technology and Technical Medicine, Department of Biomaterials Science and Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands; Collaborative Research Partner Annulus Fibrosus Rupture Program of AO Foundation, Davos, Switzerland
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Li YH, Cheng CY, Wang NK, Tan HY, Tsai YJ, Hsiao CH, Ma DHK, Yeh LK. Characterization of the modified chitosan membrane cross-linked with genipin for the cultured corneal epithelial cells. Colloids Surf B Biointerfaces 2014; 126:237-44. [PMID: 25576808 DOI: 10.1016/j.colsurfb.2014.12.029] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2014] [Revised: 12/13/2014] [Accepted: 12/16/2014] [Indexed: 12/22/2022]
Abstract
OBJECTIVES To modify a chitosan membrane (CM) by cross-linking the chitosan with genipin, a naturally occurring cross-linker extracted from Gardenia jasminoides fructus, with the aim of developing a new cell culture support and to observe the phenotypes of cultured human corneal epithelial cells (HCECs) on genipin-cross-linked chitosan membrane (GCM). METHODS We tested the cross-linking characteristics and mechanical strength of the GCM. CMs modified by cross-linking with different concentrations of genipin were prepared to investigate the rate of membrane degradation. The biocompatibility of the GCMs was investigated by determining the viability of HCECs cultured on them in vitro. The morphology of the HCECs cultured on CM or GCM was analyzed by confocal microscopy and scanning electron microscopy (SEM). Immunocytochemical staining was conducted to determine the phenotypes of the cultured cells. RESULTS The fixation index of the GCM was 31 ± 3% after treatment of CM with 0.5mM genipin. A stress-strain test showed that the GCM could tolerate three times the mechanical force of noncross-linked CM. The biodegradation rate of GCM was much slower than for CM. A 3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyltetrazolium bromide (MTT) assay showed that cell viability was not affected by cross-linking with 5.0mM genipin. SEM showed that the cultured HCECs adhered to and grew well on the surface of the GCM. Immunocytochemical staining showed keratin 3 (K3) and connexin 43 (Cx-43) immunoreactive HCECs on the GCM and their proliferative ability was not significantly affected by strong immunoreactivity of Ki-67 and p63 markers. CONCLUSIONS GCM has potential as a scaffold for corneal epithelium in ocular surface surgery and greater mechanical strength and slower degradation than unmodified CM.
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Affiliation(s)
- Ya-Han Li
- Department of Ophthalmology, Chang-Gung Memorial Hospital, Linkou, Taiwan
| | - Ching-Yi Cheng
- Department of Cosmetic Science, Graduate Institute of Health Industry Technology, Research Center for Industry of Human Ecology, Chang Gung University of Science and Technology, Kwei-Shan, Tao-Yuan, Taiwan
| | - Nan-Kai Wang
- Department of Ophthalmology, Chang-Gung Memorial Hospital, Linkou, Taiwan; Chang-Gung University College of Medicine, Taiwan
| | - Hsin-Yuan Tan
- Department of Ophthalmology, Chang-Gung Memorial Hospital, Linkou, Taiwan; Chang-Gung University College of Medicine, Taiwan
| | - Yueh-Ju Tsai
- Department of Ophthalmology, Chang-Gung Memorial Hospital, Linkou, Taiwan; Chang-Gung University College of Medicine, Taiwan
| | - Ching-Hsi Hsiao
- Department of Ophthalmology, Chang-Gung Memorial Hospital, Linkou, Taiwan; Chang-Gung University College of Medicine, Taiwan
| | - David Hui-Kang Ma
- Department of Ophthalmology, Chang-Gung Memorial Hospital, Linkou, Taiwan; Chang-Gung University College of Medicine, Taiwan
| | - Lung-Kun Yeh
- Department of Ophthalmology, Chang-Gung Memorial Hospital, Linkou, Taiwan; Chang-Gung University College of Medicine, Taiwan.
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Li Z, Kaplan KM, Wertzel A, Peroglio M, Amit B, Alini M, Grad S, Yayon A. Biomimetic fibrin–hyaluronan hydrogels for nucleus pulposus regeneration. Regen Med 2014; 9:309-26. [DOI: 10.2217/rme.14.5] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Aim: To develop a biomimetic polymeric injectable hydrogel that can support nucleus pulposus (NP) regeneration. Materials & methods: Natural polymer-based hydrogels were synthesized using fibrinogen (FBG) and hyaluronic acid (HA), conjugated by a novel two-step procedure. Bovine NP cells were cultured in FBG–HA conjugate-based 3D beads in vitro and in a nucleotomized organ culture model. Results: FBG–HA conjugate-based hydrogels prepared with 235 KDa HA at a FBG/HA w/w ratio of 17:1 showed superior gel stability and mechanical properties and markedly increased glycosaminoglycan synthesis compared with a FBG/HA mixture-based hydrogels or fibrin gels. Gene-expression levels of NP markers were maintained in vitro. In organ culture, NP cells seeded in FBG–HA conjugate-based hydrogels showed better integration with native NP tissue compared with fibrin gels. Moreover, FBG–HA conjugate-based hydrogels restored compressive stiffness and disc height after nucleotomy under dynamic load. Conclusion: Specific FBG–HA conjugate-based hydrogels may be suitable as injectable materials for minimally invasive, biological NP regeneration.
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Affiliation(s)
- Zhen Li
- AO Research Institute Davos, Davos, Switzerland
| | | | | | | | - Boaz Amit
- ProCore Biomed Ltd, Weizman Science Park, Nes Ziona, Israel
| | - Mauro Alini
- AO Research Institute Davos, Davos, Switzerland
| | | | - Avner Yayon
- ProCore Biomed Ltd, Weizman Science Park, Nes Ziona, Israel
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Jiang T, Deng M, James R, Nair LS, Laurencin CT. Micro- and nanofabrication of chitosan structures for regenerative engineering. Acta Biomater 2014; 10:1632-45. [PMID: 23851172 DOI: 10.1016/j.actbio.2013.07.003] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2013] [Revised: 05/31/2013] [Accepted: 07/01/2013] [Indexed: 11/24/2022]
Abstract
Repair and regeneration of human tissues and organs using biomaterials, cells and/or growth factors is the ultimate goal of tissue engineers. One of the grand challenges in this field is to closely mimic the structures and properties of native tissues. Regenerative engineering-the convergence of tissue engineering with advanced materials science, stem cell science, and developmental biology-represents the next valuable tool to overcome the challenges. This article reviews the recent progress in developing advanced chitosan structures using various fabrication techniques. These chitosan structures, together with stem cells and functional biomolecules, may provide a robust platform to gain insight into cell-biomaterial interactions and may function as excellent artificial extracellular matrices to regenerate complex human tissues and biological systems.
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Li J, Baker BA, Mou X, Ren N, Qiu J, Boughton RI, Liu H. Biopolymer/Calcium phosphate scaffolds for bone tissue engineering. Adv Healthc Mater 2014; 3:469-84. [PMID: 24339420 DOI: 10.1002/adhm.201300562] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2013] [Revised: 11/15/2013] [Indexed: 11/08/2022]
Abstract
With nearly 30 years of progress, tissue engineering has shown promise in developing solutions for tissue repair and regeneration. Scaffolds, together with cells and growth factors, are key components of this development. Recently, an increasing number of studies have reported on the design and fabrication of scaffolding materials. In particular, inspired by the nature of bone, polymer/ceramic composite scaffolds have been studied extensively. The purpose of this paper is to review the recent progress of the naturally derived biopolymers and the methods applied to generate biomimetic biopolymer/calcium phosphate composites as well as their biomedical applications in bone tissue engineering.
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Affiliation(s)
- Jianhua Li
- State Key Lab of Crystal Materials, Shandong University; 27 Shandanan Road Jinan 250100 China
| | - Bryan. A. Baker
- Biosystems and Biomaterials Division, The National Institute of Standards and Technology; MD 20899-8300 USA
| | - Xiaoning Mou
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences; Beijing China
| | - Na Ren
- State Key Lab of Crystal Materials, Shandong University; 27 Shandanan Road Jinan 250100 China
| | - Jichuan Qiu
- State Key Lab of Crystal Materials, Shandong University; 27 Shandanan Road Jinan 250100 China
| | - Robert I. Boughton
- Department of Physics and Astronomy; Bowling Green State University; Bowling Green OH 43403 USA
| | - Hong Liu
- State Key Lab of Crystal Materials, Shandong University; 27 Shandanan Road Jinan 250100 China
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences; Beijing China
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Gómez-Mascaraque LG, Méndez JA, Fernández-Gutiérrez M, Vázquez B, San Román J. Oxidized dextrins as alternative crosslinking agents for polysaccharides: application to hydrogels of agarose-chitosan. Acta Biomater 2014; 10:798-811. [PMID: 24121253 DOI: 10.1016/j.actbio.2013.10.003] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2013] [Revised: 08/27/2013] [Accepted: 10/03/2013] [Indexed: 12/28/2022]
Abstract
Hydrogel networks that combine suitable physical and biomechanical characteristics for tissue engineering scaffolds are in demand. The aim of this work was the development of hydrogel networks based on agarose and chitosan using oxidized dextrins as low cytotoxicity crosslinking agents, paying special attention to the study of the influence of the polysaccharide composition and oxidation degree of the dextrins in the final characteristics of the network. The results show that the formation of an interpenetrating or a semi-interpenetrating polymer network was mainly dependent on a minimum agarose content and degree of oxidation of dextrin. Spectroscopic, thermal and swelling analysis revealed good compatibility with an absence of phase separation of polysaccharides at agarose:chitosan proportions of 50:50 and 25:75. The analysis of atomic force microscopy images showed the formation of a fibrillar microstructure whose distribution within the crosslinked chitosan depended mainly on the crosslinker. All materials exhibited the viscoelastic behaviour typical of gels, with a constant storage modulus independent of frequency for all compositions. The stiffness was strongly influenced by the degree of oxidation of the crosslinker. Cellular response to the hydrogels was studied with cells of different strains, and cell adhesion and proliferation was correlated with the homogeneity of the samples and their elastic properties. Some hydrogel formulations seemed to be candidates for tissue engineering applications such as wound healing or soft tissue regeneration.
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Affiliation(s)
- Laura G Gómez-Mascaraque
- CIBER-BBN, Ebro River Campus, R&D Building, Block 5, Floor 1, Poeta Mariano Esquillor s/n, 50017 Zaragoza, Spain; Institute of Polymer Science and Technology, CSIC, Juan de la Cierva 3, 28006 Madrid, Spain
| | - José Alberto Méndez
- Escola Politècnica Superior, Edifici PI, Campus Montilivi, University of Girona, 17071 Girona, Spain
| | - Mar Fernández-Gutiérrez
- CIBER-BBN, Ebro River Campus, R&D Building, Block 5, Floor 1, Poeta Mariano Esquillor s/n, 50017 Zaragoza, Spain; Institute of Polymer Science and Technology, CSIC, Juan de la Cierva 3, 28006 Madrid, Spain
| | - Blanca Vázquez
- CIBER-BBN, Ebro River Campus, R&D Building, Block 5, Floor 1, Poeta Mariano Esquillor s/n, 50017 Zaragoza, Spain; Institute of Polymer Science and Technology, CSIC, Juan de la Cierva 3, 28006 Madrid, Spain.
| | - Julio San Román
- CIBER-BBN, Ebro River Campus, R&D Building, Block 5, Floor 1, Poeta Mariano Esquillor s/n, 50017 Zaragoza, Spain; Institute of Polymer Science and Technology, CSIC, Juan de la Cierva 3, 28006 Madrid, Spain
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Sharma K, Somavarapu S, Colombani A, Govind N, Taylor KMG. Nebulised siRNA encapsulated crosslinked chitosan nanoparticles for pulmonary delivery. Int J Pharm 2013; 455:241-7. [PMID: 23876499 DOI: 10.1016/j.ijpharm.2013.07.024] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2013] [Revised: 07/02/2013] [Accepted: 07/07/2013] [Indexed: 10/26/2022]
Abstract
PURPOSE To explore the potential of crosslinked chitosan nanoparticles as carriers for delivery of siRNA using a jet nebuliser. MATERIALS AND METHODS Nanoparticles encapsulating siRNA were prepared using an ionic crosslinking technique at chitosan to siRNA weight/weight ratios of 10:1, 30:1 and 50:1. Particles were characterised for their size, charge, morphology, pH stability and siRNA encapsulation efficiency. Gel electrophoresis was used to assess the association and stability of siRNA with nanoparticles, including after aerosolisation using a Pari LC Sprint jet nebuliser. The aerosolisation properties of FITC labelled chitosan nanoparticles were investigated using a two-stage impinger. Cell viability was performed with H-292 cells using a WST-1 assay. RESULTS Positively charged spherical nanoparticles were produced with mean diameters less than 150 nm, at all chitosan to siRNA ratios. Nanoparticles were non-aggregated at the pH of the airways and showed high siRNA encapsulation efficiency (>96%). Complete binding of siRNA to chitosan nanoparticles was observed when the w/w ratio was 50:1. Nebulisation produced fine particle fractions of 54±11% and 57.3±1.9% for chitosan and chitosan:siRNA (10:1 w/w) nanoparticles respectively. The stability of chitosan-encapsulated siRNA was maintained after nebulisation. Cell viability was high (>85%) at the highest chitosan concentration (83 μg/ml). CONCLUSION The results suggest that crosslinked chitosan nanoparticles have potential for siRNA delivery to the lungs using a jet nebuliser.
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Affiliation(s)
- Ketan Sharma
- UCL, School of Pharmacy, 29-39 Brunswick Square, London WC1N 1AX, UK
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Song W, Oliveira MB, Sher P, Gil S, Nóbrega JM, Mano JF. Bioinspired methodology for preparing magnetic responsive chitosan beads to be integrated in a tubular bioreactor for biomedical applications. Biomed Mater 2013; 8:045008. [DOI: 10.1088/1748-6041/8/4/045008] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Abstract
The nucleus pulposus of the intervertebral disk contains high amounts of the proteoglycan aggrecan, which confers the disk with a remarkable ability to resist compression. Other molecules such as collagens and noncollagenous proteins in the extracellular matrix are also essential for function. During disk degeneration, aggrecan and other molecules are lost due to proteolysis. This can result in loss of disk height, which can ultimately lead to pain. Biological therapy of intervertebral disk degeneration aims at preventing or restoring primarily aggrecan content and other molecules using therapeutic molecules. The purpose of the article is to review recent advances in biological repair of degenerate disks and pain.
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Affiliation(s)
- Fackson Mwale
- Division of Orthopaedic Surgery, McGill University, Lady Davis Institute for Medical Research, Montreal, Quebec, Canada,Address for correspondence Fackson Mwale, PhD Division of Orthopaedic Surgery, McGill University, Lady Davis Institute for Medical Research3755 Chemin de la Cote Ste-Catherine, Montreal, Quebec H3T 1E2Canada
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Jiang T, Ren XJ, Tang JL, Yin H, Wang KJ, Zhou CL. Preparation and characterization of genipin-crosslinked rat acellular spinal cord scaffolds. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2013; 33:3514-21. [PMID: 23706241 DOI: 10.1016/j.msec.2013.04.046] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2012] [Revised: 03/04/2013] [Accepted: 04/22/2013] [Indexed: 10/26/2022]
Abstract
The feasibility of rat acellular spinal cord scaffolds for tissue engineering applications was investigated. Fresh rat spinal cords were decellularized and crosslinked with genipin (GP) to improve their structural stability and mechanical properties. The GP-crosslinked spinal cord scaffolds possessed a porous structure with an average pore diameter of 31.1 μm and a porosity of 81.5%. The resultant scaffolds exhibited a water uptake ratio of 229%, and moderate in vitro degradation rates of less than 5% in phosphate-buffered saline (PBS) and slightly more than 20% in trypsin-containing buffer, within 14 days. The ultimate tensile strength and elastic modulus of GP-crosslinked spinal cord scaffolds were determined to be 0.193±0.064 MPa and 1.541±0.082 MPa, respectively. Compared with glutaraldehyde (GA)-crosslinked acellular spinal cord scaffolds, GP-crosslinked scaffolds demonstrated similar microstructure and mechanical properties but superior biocompatibility as indicated by cytotoxicity evaluation and rat mesenchymal stem cell (MSC) adhesion behavior. Cells were able to penetrate throughout the crosslinked scaffold due to the presence of an interconnected porous structure. The low cytotoxicity of GP facilitated cell proliferation and extracellular matrix (ECM) secretion in vitro on the crosslinked scaffolds over 7 days. Thus, these GP-crosslinked spinal cord scaffolds show great promise for tissue engineering applications.
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Affiliation(s)
- Tao Jiang
- Department of Orthopedics, Xinqiao Hospital, The Third Military Medical University, Chongqing, China
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van Dijk BGM, Potier E, Ito K. Long-term culture of bovine nucleus pulposus explants in a native environment. Spine J 2013; 13:454-63. [PMID: 23340344 DOI: 10.1016/j.spinee.2012.12.006] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/08/2012] [Revised: 09/07/2012] [Accepted: 12/09/2012] [Indexed: 02/03/2023]
Abstract
BACKGROUND CONTEXT Chronic low back pain is a disease with tremendous financial and social implications, and it is often caused by intervertebral disc degeneration. Regenerative therapies for disc repair are promising treatments, but they need to be tested in physiological models. PURPOSE To develop a physiological in vitro explant model that incorporates the native environment of the intervertebral disc, for example, hypoxia, low glucose, and high tissue osmolarity. STUDY DESIGN Bovine nucleus pulposus (NP) explants were cultured for 42 days in conditions mimicking the native physiological environment. Two different approaches were used to balance the swelling pressure of the NP: raised medium osmolarity or an artificial annulus. METHODS Bovine NP explants were either cultured in media with osmolarity balanced at isotonic and hypertonic levels compared with the native tissue or cultured inside a fiber jacket used as an artificial annulus. Oxygen and glucose levels were set at either standard (21% O2 and 4.5 g/L glucose) or physiological (5% O2 and 1 g/L glucose) levels. Samples were analyzed at Day 0, 3, and 42 for tissue composition (water, sulfated glycosaminoglycans, DNA, and hydroxyproline contents and fixed charge density), tissue histology, cell viability, and cellular behavior with messenger RNA (mRNA) expression. RESULTS Both the hypertonic culture and the artificial annulus approach maintained the tissue matrix composition for 42 days. At Day 3, mRNA expressions of aggrecan, collagen Type I, and collagen Type II in both hypertonic and artificial annulus cultures were not different from Day 0; however, at Day 42, the artificial annulus preserved the mRNA expression closer to Day 0. Gene expressions of matrix metalloprotease 13, tissue inhibitor of matrix metalloprotease 1, and tissue inhibitor of matrix metalloprotease 2 were downregulated under physiological O2 and glucose levels, whereas the other parameters analyzed were not affected. CONCLUSIONS Although the hypertonic culture and the artificial annulus approach are both promising models to test regenerative therapies, the artificial annulus was better able to maintain a cellular behavior closer to the native tissue in longer term cultures.
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Affiliation(s)
- Bart G M van Dijk
- Orthopaedic Biomechanics, Department of Biomedical Engineering, Eindhoven University of Technology, PO Box 513, GEM-Z 4.115, 5600 MB Eindhoven, The Netherlands
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Smith JD, Weiss LE, Burgess JE, West AI, Campbell PG. Biologically Active Blood Plasma-Based Biomaterials as a New Paradigm for Tissue Repair Therapies. ACTA ACUST UNITED AC 2013. [DOI: 10.1089/dst.2012.0024] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Metabolism of Genipin in Rat and Identification of Metabolites by Using Ultraperformance Liquid Chromatography/Quadrupole Time-of-Flight Tandem Mass Spectrometry. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2013; 2013:957030. [PMID: 23573161 PMCID: PMC3614096 DOI: 10.1155/2013/957030] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/17/2012] [Accepted: 02/10/2013] [Indexed: 11/17/2022]
Abstract
The in vivo and in vitro metabolism of genipin was systematically investigated in the present study. Urine, plasma, feces, and bile were collected from rats after oral administration of genipin at a dose of 50 mg/kg body weight. A rapid and sensitive method using ultraperformance liquid chromatography coupled with electrospray ionization quadrupole time-of-flight tandem mass spectrometry (UPLC-Q/TOF MS) was developed for analysis of metabolic profile of genipin in rat biological samples (urine, plasma, feces, and bile). A total of ten metabolites were detected and identified by comparing their fragmentation patterns with that of genipin using MetaboLynx software tools. On the basis of the chromatographic peak area, the sulfated and glucuronidated conjugates of genipin were identified as major metabolites. And the existence of major metabolites G1 and G2 was confirmed by the in vitro enzymatic study further. Then, metabolite G1 was isolated from rat bile by semipreparative HPLC. Its structure was unambiguously identified as genipin-1-o-glucuronic acid by comparison of its UV, IR, ESI-MS, 1H-NMR, and 13C-NMR spectra with conference. In general, genipin was a very active compound that would transform immediately, and the parent form of genipin could not be observed in rats biological samples. The biotransformation pathways of genipin involved demethylated, ring-opened, cysteine-conjugated, hydroformylated, glucuronidated, and sulfated transformations.
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New perspectives in cell delivery systems for tissue regeneration: natural-derived injectable hydrogels. J Appl Biomater Funct Mater 2012; 10:67-81. [PMID: 22865572 DOI: 10.5301/jabfm.2012.9418] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/04/2012] [Indexed: 01/11/2023] Open
Abstract
Natural polymers, because of their biocompatibility, availability, and physico-chemical properties have been the materials of choice for the fabrication of injectable hydrogels for regenerative medicine. In particular, they are appealing materials for delivery systems and provide sustained and controlled release of drugs, proteins, gene, cells, and other active biomolecules immobilized.In this work, the use of hydrogels obtained from natural source polymers as cell delivery systems is discussed. These materials were investigated for the repair of cartilage, bone, adipose tissue, intervertebral disc, neural, and cardiac tissue. Papers from the last ten years were considered, with a particular focus on the advances of the last five years. A critical discussion is centered on new perspectives and challenges in the regeneration of specific tissues, with the aim of highlighting the limits of current systems and possible future advancements.
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Sporicidal efficacy of genipin: a potential theoretical alternative for biomaterial and tissue graft sterilization. Cell Tissue Bank 2012; 14:381-93. [PMID: 22875200 DOI: 10.1007/s10561-012-9335-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2012] [Accepted: 07/25/2012] [Indexed: 11/27/2022]
Abstract
Terminal sterilization of musculoskeletal allografts by gamma radiation minimizes the risk of disease transmission but impairs allograft mechanical properties. Commonly employed crosslinking agents can sterilize tissues without affecting mechanical properties adversely; however, these agents are toxic. Genipin is reported to be a benign crosslinking agent that strengthens mechanical properties of tissues; however, the antimicrobial capacity of genipin is largely unknown. The present study's aims were: (1) to assess the sporicidal potential of genipin, (2) to improve antimicrobial capacity by changing chemical and physical treatment conditions. To establish genipin's sterilization potential Bacillus subtilis var. niger spore strips were treated with 0-10% genipin in PBS or in 1:1 DMSO:PBS up to 72 h at room temperature (RT). Sterilizing doses and concentrations of genipin were used to treat B. pumilus and Geobacillus stearothermophilus spores to assess broader spectrum sporicidal activity of genipin. Scanning electron microscopy (SEM) was performed to evaluate gross morphological changes after genipin treatment. Optimal sterilization conditions were determined by evaluating the effects of temperature (RT-50 °C), DMSO:PBS ratio (0:100-100:0), and treatment duration (24-72 h) on B. subtilis. Genipin penetration of full thickness bovine patellar tendon and cortical bone specimens was observed to assess the feasibility of the agent for treating grafts. Initial studies showed that after 72 h of treatment at RT with 0.63-10% genipin/DMSO:PBS B. subtilis spore strips were sterilized; 0.63% genipin/PBS did not sterilize spore strips at 72 h at RT. Genipin doses and concentrations that sterilized B. subtilis spore strips sterilized B. pumilus and G. stearothermophilus spore strips. SEM revealed no gross morphological differences between untreated and treated spores. Treatment optimization resulted in sterilization within 24 h with 100% PBS, and DMSO facilitated sporicidal activity. Genipin penetrated full thickness patellar tendon specimens and 3.72 ± 0.58 mm in cortical bone specimens. Genipin sterilizes B. subtilis, B. pumilus, and G. stearothermophilus spore strips. It penetrates soft and hard tissues at doses previously shown to be non-toxic and to improve mechanical strength in collagen-rich soft tissues. Further studies are indicated to assess genipin's effects on the mechanical properties of genipin-sterilized grafts, the ability of genipin to eradicate infectious species other than spores, and to assess whether sterilant activity persists after penetrating tissues and biomaterials.
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Lewis G. Nucleus pulposus replacement and regeneration/repair technologies: present status and future prospects. J Biomed Mater Res B Appl Biomater 2012; 100:1702-20. [PMID: 22566484 DOI: 10.1002/jbm.b.32712] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2011] [Revised: 02/19/2012] [Accepted: 03/18/2012] [Indexed: 12/28/2022]
Abstract
Degenerative disc disease is implicated in the pathogenesis of many painful conditions of the back, chief among which is low back pain. Acute and/or chronic low back pain (A/CLBP) afflicts a large number of people, thus making it a major healthcare issue with concomitant cost ramifications. When conservative treatments for A/CLBP, such as bed rest, anti-inflammatory medications, and physical therapy, prove to be ineffectual, surgical options are recommended. The most popular of these is discectomy followed by fusion. Although there are many reports of good to excellent outcomes with this method, there are concerns, such as long-term adverse biomechanical consequences to adjacent functional spinal unit(s). A surgical option that has been attracting much attention recently is replacement or regeneration/repair of the nucleus pulposus, an approach that holds the prospect of not compromising either mobility or function and causing no adjacent-level injury. There is a sizeable body of literature highlighting this option, comprising in vitro biomechanical studies, finite element analyses, animal-model studies, and limited clinical evaluations. This work is a review of this body of literature and is organized into four parts, with the focus being on replacement technologies, regeneration/repair technologies, and detailed expositions on 14 areas for future study. This review ends with a summary of the salient points made.
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Affiliation(s)
- Gladius Lewis
- Department of Mechanical Engineering, The University of Memphis, Memphis, Tennessee 38152, USA.
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Sasson A, Patchornik S, Eliasy R, Robinson D, Haj-Ali R. Hyperelastic mechanical behavior of chitosan hydrogels for nucleus pulposus replacement—Experimental testing and constitutive modeling. J Mech Behav Biomed Mater 2012; 8:143-53. [DOI: 10.1016/j.jmbbm.2011.12.008] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2011] [Revised: 12/14/2011] [Accepted: 12/18/2011] [Indexed: 10/14/2022]
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Whatley BR, Wen X. Intervertebral disc (IVD): Structure, degeneration, repair and regeneration. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2012. [DOI: 10.1016/j.msec.2011.10.011] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Hezaveh H, Muhamad II, Noshadi I, Shu Fen L, Ngadi N. Swelling behaviour and controlled drug release from cross-linked κ-carrageenan/NaCMC hydrogel by diffusion mechanism. J Microencapsul 2012; 29:368-79. [DOI: 10.3109/02652048.2011.651501] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Ding Y, Zhang T, Tao JS, Tan B, Guo CR, Yang L. HPLC-MS/MS method to determine genipin in rat plasma after hydrolysis with sulfatase and its application to a pharmacokinetic study. Biomed Chromatogr 2011; 26:816-25. [PMID: 22113875 DOI: 10.1002/bmc.1735] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2011] [Accepted: 09/08/2011] [Indexed: 11/05/2022]
Abstract
A sensitive high-performance liquid chromatography-tandem mass spectrometry (LC-MS/MS) method was developed for the quantification of genipin in rat plasma after hydrolysis with sulfatase. Genipin could not be detected directly as it could be transformed into other forms such as conjugated-genipin immediately after administration. The conjugated genipin could be hydrolyzed by sulfatase to genipin. The conditions of hydrolysis were investigated. Genipin and the internal standard, peoniflorin (IS), were separated on a reversed-phase column by gradient elution and detected using an electrospray ion source on a 4000 QTrap triple-quadrupole mass spectrometer. The quantification was performed using multiple reaction monitoring with selected precursor-product ion pairs of the transitions m/z 225.0 → 122.7 and m/z 479.1 → 449.1 for genipin and peoniflorin. The assay was linear over the concentration range of 1.368-1368 ng/mL, with correlation coefficients of 0.9989. Intra- and inter-day precisions and accuracy were all within 15%. The lower limit of quantification was 1.368 ng/mL. The recoveries of genipin and peoniflorin were more than 53.3 and 51.2%. The highly sensitive method was successfully applied to estimated pharmacokinetic parameters of genipin following oral and intravenous administration to rats. The absolute bioavailability of genipin was 80.2% in rat, which is the first report.
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Affiliation(s)
- Yue Ding
- Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
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Park SH, Gil ES, Cho H, Mandal BB, Tien LW, Min BH, Kaplan DL. Intervertebral disk tissue engineering using biphasic silk composite scaffolds. Tissue Eng Part A 2011; 18:447-58. [PMID: 21919790 DOI: 10.1089/ten.tea.2011.0195] [Citation(s) in RCA: 74] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Scaffolds composed of synthetic, natural, and hybrid materials have been investigated as options to restore intervertebral disk (IVD) tissue function. These systems fall short of the lamellar features of the native annulus fibrosus (AF) tissue or focus only on the nucleus pulposus (NP) tissue. However, successful regeneration of the entire IVD requires a combination approach to restore functions of both the AF and NP. To address this need, a biphasic biomaterial structure was generated by using silk protein for the AF and fibrin/hyaluronic acid (HA) gels for the NP. Two cell types, porcine AF cells and chondrocytes, were utilized. For the AF tissue, two types of scaffold morphologies, lamellar and porous, were studied with the porous system serving as a control. Toroidal scaffolds formed out of the lamellar, and porous silk materials were used to generate structures with an outer diameter of 8 mm, inner diameter of 3.5 mm, and a height of 3 mm (the interlamellar distance in the lamellar scaffold was 150-250 μm, and the average pore sizes in the porous scaffolds were 100-250 μm). The scaffolds were seeded with porcine AF cells to form AF tissue, whereas porcine chondrocytes were encapsulated in fibrin/HA hydrogels for the NP tissue and embedded in the center of the toroidal disk. Histology, biochemical assays, and gene expression indicated that the lamellar scaffolds supported AF-like tissue over 2 weeks. Porcine chondrocytes formed the NP phenotype within the hydrogel after 4 weeks of culture with the AF tissue that had been previously cultured for 2 weeks, for a total of 6 weeks of cultivation. This biphasic scaffold simulating in combination of both AF and NP tissues was effective in the formation of the total IVD in vitro.
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Affiliation(s)
- Sang-Hyug Park
- Department of Biomedical Engineering, Tufts University, Medford, MA 02155, USA
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van Dijk B, Potier E, Ito K. Culturing bovine nucleus pulposus explants by balancing medium osmolarity. Tissue Eng Part C Methods 2011; 17:1089-96. [PMID: 21718168 DOI: 10.1089/ten.tec.2011.0215] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Regenerative therapies are promising treatments for early intervertebral disc degeneration. To test their efficacy, an in vitro tissue-level model would be valuable. Nucleus pulposus (NP) explant culture may constitute such a model, as the earliest signs of degeneration are in the NP. However, in NP explant cultures, balancing tissue osmolarity is crucial to preventing swelling, proteoglycan (PG) loss and, therefore, maintaining a native cell environment. In this study, we investigated the effect of medium osmolarity on NP explants. We hypothesized that balancing the inherent tissue osmolarity would prevent swelling and thus maintain NP tissue in a native state. Bovine NP explants were cultured for 21 days in hypo-, iso-, and hyper-tonic conditions using either sucrose or polyethylene glycol (PEG) to raise medium osmolarity. Explants were analyzed for water and biochemical content, cell viability, gene expression, and tissue histology, and compared to day 0 samples. In hypo-tonic and both sucrose cultures, swelling was not prevented, resulting in PG loss and changes in cell behavior. Only PEG cultures maintained water and biochemical content and a histological aspect similar to those of native tissue, with better results for hyper- than for iso-tonic conditions. Using PEG to raise culture medium osmolarity, we were able to maintain the NP tissue specific matrix composition, important for disc cell behavior. This approach, thus, constitutes a promising model to test regenerative therapies for early intervertebral disc degeneration.
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Affiliation(s)
- Bart van Dijk
- Orthopaedic Biomechanics, Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands
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Park SH, Cho H, Gil ES, Mandal BB, Min BH, Kaplan DL. Silk-fibrin/hyaluronic acid composite gels for nucleus pulposus tissue regeneration. Tissue Eng Part A 2011; 17:2999-3009. [PMID: 21736446 DOI: 10.1089/ten.tea.2010.0747] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Scaffold designs are critical for in vitro culture of tissue-engineered cartilage in three-dimensional environments to enhance cellular differentiation for tissue engineering and regenerative medicine. In the present study we demonstrated silk and fibrin/hyaluronic acid (HA) composite gels as scaffolds for nucleus pulposus (NP) cartilage formation, providing both biochemical support for NP outcomes as well as fostering the retention of size of the scaffold during culture due to the combined features of the two proteins. Passage two (P2) human chondrocytes cultured in 10% serum were encapsulated within silk-fibrin/HA gels. Five study groups with fibrin/HA gel culture (F/H) along with varying silk concentrations (2% silk gel only, fibrin/HA gel culture with 1% silk [F/H+1S], 1.5% silk [F/H+1.5S], and 2% silk [F/H+2S]) were cultured in serum-free chondrogenic defined media (CDM) for 4 weeks. Histological examination with alcian blue showed a defined chondrogenic area at 1 week in all groups that widened homogenously until 4 weeks. In particular, chondrogenic differentiation observed in the F/H+1.5S had no reduction in size throughout the culture period. The results of biochemical and molecular biological evaluations supported observations made during histological examination. Mechanical strength measurements showed that the silk mixed gels provided stronger mechanical properties for NP tissue than fibrin/HA composite gels in CDM. This effect could potentially be useful in the study of in vitro NP tissue engineering as well as for clinical implications for NP tissue regeneration.
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Affiliation(s)
- Sang-Hyug Park
- Biomedical Engineering, Tufts University, Medford, Massachusetts 02155, USA
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Almeida CR, Vasconcelos DP, Gonçalves RM, Barbosa MA. Enhanced mesenchymal stromal cell recruitment via natural killer cells by incorporation of inflammatory signals in biomaterials. J R Soc Interface 2011; 9:261-71. [PMID: 21752807 DOI: 10.1098/rsif.2011.0357] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
An exacerbated inflammatory response questions biomaterial biocompatibility, but on the other hand, inflammation has a central role in the regulation of tissue regeneration. Therefore, it may be argued that an 'ideal' inflammatory response is crucial to achieve efficient tissue repair/regeneration. Natural killer (NK) cells, being one of the first populations arriving at an injury site, can have an important role in regulating bone repair/regeneration, particularly through interactions with mesenchymal stem/stromal cells (MSCs). Here, we studied how biomaterials designed to incorporate inflammatory signals affected NK cell behaviour and NK cell-MSC interactions. Adsorption of the pro-inflammatory molecule fibrinogen (Fg) to chitosan films led to a 1.5-fold increase in adhesion of peripheral blood human NK cells, without an increase in cytokine secretion. Most importantly, it was found that NK cells are capable of stimulating a threefold increase in human bone marrow MSC invasion, a key event taking place in tissue repair, but did not affect the expression of the differentiation marker alkaline phosphatase (ALP). Of significant importance, this NK cell-mediated MSC recruitment was modulated by Fg adsorption. Designing novel biomaterials leading to rational modulation of the inflammatory response is proposed as an alternative to current bone regeneration strategies.
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Affiliation(s)
- Catarina R Almeida
- INEB-Instituto de Engenharia Biomédica, Biomaterials Division, NEWTherapies Group, Rua do Campo Alegre 823, 4150-180 Porto, Portugal.
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A novel thiol-modified hyaluronan and elastin-like polypetide composite material for tissue engineering of the nucleus pulposus of the intervertebral disc. Spine (Phila Pa 1976) 2011; 36:1022-9. [PMID: 21150701 DOI: 10.1097/brs.0b013e3181e7b705] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
STUDY DESIGN Biomechanical, in vitro, and initial in vivo evaluation of a thiol-modified hyaluronan (TM-HA) and elastin-like polypeptide (ELP) composite hydrogel for nucleus pulposus (NP) tissue engineering. OBJECTIVE To investigate the utility of a TM-HA and ELP composite material as a potential tissue-engineering scaffold to reconstitute the NP in early degenerative disc disease (DDD) on the basis of both biomechanical and biologic parameters. SUMMARY OF BACKGROUND DATA DDD is a common ailment with enormous medical, psychosocial, and economic ramifications. Only end-stage surgical therapies are currently widely available. A less invasive, early stage therapy may provide a clinically relevant treatment option. METHODS TM-HA and ELP were combined in various concentrations and cross-linked using poly (ethylene glycol) diacrylate. Resulting materials were evaluated biomechanically using confined compression to determine biphasic material properties. In vitro cell culture with human intervertebral disc (IVD) cells seeded within TM-HA/ELP scaffolds was analyzed for cell viability and phenotype. The hydrogels' materials were evaluated in an established New Zealand White (NZW) rabbit model of DDD. RESULTS The addition of ELP to TM-HA-based hydrogels resulted in a stiffer construct, which is less stiff than native NP but has time-dependant loading characteristics that may be desirable when injected into the IVD. In vitro experiments demonstrated 70% cell viability at 3 weeks with apparent maintenance of phenotype on the basis of morphologic and immunohistochemical data. The addition of ELP had a positive desirable biomechanical effect but did not have a significant positive or negative biologic effect on cell activity. The in vivo feasibility study demonstrated favorable material characteristics and biocompatibility for application as a minimally invasive injectable NP supplement. CONCLUSIONS TM-HA-based hydrogels provide a hospitable environment for human IVD cells and have material characteristics, particularly when supplemented with ELPs that are attractive for potential application as an injectable NP supplement.
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Schek R, Michalek A, Iatridis J. Genipin-crosslinked fibrin hydrogels as a potential adhesive to augment intervertebral disc annulus repair. Eur Cell Mater 2011; 21:373-83. [PMID: 21503869 PMCID: PMC3215264 DOI: 10.22203/ecm.v021a28] [Citation(s) in RCA: 102] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
Treatment of damaged intervertebral discs is a significant clinical problem and, despite advances in the repair and replacement of the nucleus pulposus, there are few effective strategies to restore defects in the annulus fibrosus. An annular repair material should meet three specifications: have a modulus similar to the native annulus tissue, support the growth of disc cells, and maintain adhesion to tissue under physiological strain levels. We hypothesized that a genipin crosslinked fibrin gel could meet these requirements. Our mechanical results showed that genipin crosslinked fibrin gels could be created with a modulus in the range of native annular tissue. We also demonstrated that this material is compatible with the in vitro growth of human disc cells, when genipin:fibrin ratios were 0.25:1 or less, although cell proliferation was slower and cell morphology more rounded than for fibrin alone. Finally, lap tests were performed to evaluate adhesion between fibrin gels and pieces of annular tissue. Specimens created without genipin had poor handling properties and readily delaminated, while genipin crosslinked fibrin gels remained adhered to the tissue pieces at strains exceeding physiological levels and failed at 15-30%. This study demonstrated that genipin crosslinked fibrin gels show promise as a gap-filling adhesive biomaterial with tunable material properties, yet the slow cell proliferation suggests this biomaterial may be best suited as a sealant for small annulus fibrosus defects or as an adhesive to augment large annulus repairs. Future studies will evaluate degradation rate, fatigue behaviors, and long-term biocompatibility.
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Affiliation(s)
| | | | - J.C. Iatridis
- Address for correspondence: James C. Iatridis, Leni and Peter W. May Department of Orthopaedics, Mount Sinai School of Medicine, One Gustave L. Levy Place, Box 1188, New York, NY 10029-6574, USA, Telephone Number: 212-241-1517,
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