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Ren K, Cui H, Xu Q, He C, Li G, Chen X. Injectable Polypeptide Hydrogels with Tunable Microenvironment for 3D Spreading and Chondrogenic Differentiation of Bone-Marrow-Derived Mesenchymal Stem Cells. Biomacromolecules 2016; 17:3862-3871. [DOI: 10.1021/acs.biomac.6b00884] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Kaixuan Ren
- Key
Laboratory of Polymer Ecomaterials, Changchun Institute of Applied
Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
- University of Chinese Academy of Sciences, Beijing 100039, P. R. China
| | - Haitao Cui
- Key
Laboratory of Polymer Ecomaterials, Changchun Institute of Applied
Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
- University of Chinese Academy of Sciences, Beijing 100039, P. R. China
| | - Qinghua Xu
- Key
Laboratory of Polymer Ecomaterials, Changchun Institute of Applied
Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
- University of Chinese Academy of Sciences, Beijing 100039, P. R. China
| | - Chaoliang He
- Key
Laboratory of Polymer Ecomaterials, Changchun Institute of Applied
Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
| | - Gao Li
- Key
Laboratory of Polymer Ecomaterials, Changchun Institute of Applied
Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
| | - Xuesi Chen
- Key
Laboratory of Polymer Ecomaterials, Changchun Institute of Applied
Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
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52
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Eslahi N, Abdorahim M, Simchi A. Smart Polymeric Hydrogels for Cartilage Tissue Engineering: A Review on the Chemistry and Biological Functions. Biomacromolecules 2016; 17:3441-3463. [PMID: 27775329 DOI: 10.1021/acs.biomac.6b01235] [Citation(s) in RCA: 146] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Stimuli responsive hydrogels (SRHs) are attractive bioscaffolds for tissue engineering. The structural similarity of SRHs to the extracellular matrix (ECM) of many tissues offers great advantages for a minimally invasive tissue repair. Among various potential applications of SRHs, cartilage regeneration has attracted significant attention. The repair of cartilage damage is challenging in orthopedics owing to its low repair capacity. Recent advances include development of injectable hydrogels to minimize invasive surgery with nanostructured features and rapid stimuli-responsive characteristics. Nanostructured SRHs with more structural similarity to natural ECM up-regulate cell-material interactions for faster tissue repair and more controlled stimuli-response to environmental changes. This review highlights most recent advances in the development of nanostructured or smart hydrogels for cartilage tissue engineering. Different types of stimuli-responsive hydrogels are introduced and their fabrication processes through physicochemical procedures are reported. The applications and characteristics of natural and synthetic polymers used in SRHs are also reviewed with an outline on clinical considerations and challenges.
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Affiliation(s)
- Niloofar Eslahi
- Department of Textile Engineering, Science and Research Branch, Islamic Azad University , P.O. Box 14515/775, Tehran, Iran
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53
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González-Díaz EC, Varghese S. Hydrogels as Extracellular Matrix Analogs. Gels 2016; 2:E20. [PMID: 30674152 PMCID: PMC6318624 DOI: 10.3390/gels2030020] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2016] [Revised: 06/29/2016] [Accepted: 07/25/2016] [Indexed: 02/02/2023] Open
Abstract
The extracellular matrix (ECM) is the non-cellular component of tissue that provides physical scaffolding to cells. Emerging studies have shown that beyond structural support, the ECM provides tissue-specific biochemical and biophysical cues that are required for tissue morphogenesis and homeostasis. Hydrogel-based platforms have played a key role in advancing our knowledge of the role of ECM in regulating various cellular functions. Synthetic hydrogels allow for tunable biofunctionality, as their material properties can be tailored to mimic those of native tissues. This review discusses current advances in the design of hydrogels with defined physical and chemical properties. We also highlight research findings that demonstrate the impact of matrix properties on directing stem cell fate, such as self-renewal and differentiation. Recent and future efforts towards understanding cell-material interactions will not only advance our basic understanding, but will also help design tissue-specific matrices and delivery systems to transplant stem cells and control their response in vivo.
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Affiliation(s)
- Eva C González-Díaz
- Department of Bioengineering, University of California San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA.
| | - Shyni Varghese
- Department of Bioengineering, University of California San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA.
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54
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Çelik E, Bayram C, Akçapınar R, Türk M, Denkbaş EB. Calcified and mechanically debilitated three-dimensional hydrogel environment induces hypertrophic trend in chondrocytes. J BIOACT COMPAT POL 2016. [DOI: 10.1177/0883911516633894] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Currently, the main focus on tissue engineering strategies is to mimic the extracellular matrix of the related tissues. Many studies accomplished to build tissue scaffolds to act as the natural surroundings of the specific interest, which can be established to behave like either healthy or unhealthy tissues. The latter one of these conditions is a quite new approach and crucial for the design of three-dimensional in vitro disease models. This study investigates the potential of a composite scaffold consisting hydroxyapatite-integrated fluorenyl-9-methoxycarbonyl diphenylalanine hydrogels by focusing on the optimization of this hybrid scaffold for the development of an in vitro model of degenerative cartilage. Cell growth, chondrocyte proliferation, extracellular matrix production, hypertrophy marker monitoring, scaffold mechanical properties, and morphological analysis were evaluated. Fluorenyl-9-methoxycarbonyl diphenylalanine dipeptides were dissolved in null cell culture media and pH decreased sequentially to compel peptides to self-organize into fibrous hydrogel scaffolds. Nano-hydroxyapatite crystals were incorporated into fluorenyl-9-methoxycarbonyl diphenylalanine hydrogels during the gelation to investigate the effect on chondrocytes. It is observed that hydroxyapatite incorporation into peptide hydrogels significantly increased the alkaline phosphatase activity and assymetrical cell divisions, which is appraised as an outcome of chondrocyte hypertrophy. It is concluded that chondrocytes develop a hypertrophic potential when they are cultured in a media with nano-hydroxyapatites in a three-dimensional cell culture matrix mimicking the extracellular matrix conditions of degenerative cartilage.
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Affiliation(s)
- Ekin Çelik
- Bioengineering Department, Hacettepe University, Ankara, Turkey
| | - Cem Bayram
- Advanced Technologies Research and Application Center, Hacettepe University, Ankara, Turkey
| | - Rümeysa Akçapınar
- Faculty of Veterinary Medicine, Kirikkale University, Kirikkale, Turkey
| | - Mustafa Türk
- Department of Bioengineering, Faculty of Engineering, Kirikkale University, Kirikkale, Turkey
| | - Emir Baki Denkbaş
- Bioengineering Department, Hacettepe University, Ankara, Turkey
- Department of Chemistry, Faculty of Science, Hacettepe University, Ankara, Turkey
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55
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Yao Y, Zeng L, Huang Y. The enhancement of chondrogenesis of ATDC5 cells in RGD-immobilized microcavitary alginate hydrogels. J Biomater Appl 2016; 31:92-101. [PMID: 27000189 DOI: 10.1177/0885328216640397] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
In our previous work, we have developed an effective microcavitary alginate hydrogel for proliferation of chondrocytes and maintenance of chondrocytic phenotype. In present work, we investigated whether microcavitary alginate hydrogel could promote the chondrogenesis of progenitor cells. Moreover, we attempted to further optimize this system by incorporating synthetic Arg-Gly-Asp peptide. ATDC5 cells were seeded into microcavitary alginate hydrogel with or without Arg-Gly-Asp immobilization. Cell Counting Kit-8 and live/dead staining were conducted to analyze cell proliferation. Real-time polymerase chain reaction (RT-PCR), hematoxylin and eosin, and Toluidine blue O staining as well as Western blot assay was performed to evaluate the cartilaginous markers at transcriptional level and at protein level, respectively. The obtained data demonstrated that Arg-Gly-Asp-immobilized microcavitary alginate hydrogel was preferable to promote the cell proliferation. Also, Arg-Gly-Asp-immobilized microcavitary alginate hydrogel improved the expression of chondrocytic genes including Collagen II and Aggrecan when compared with microcavitary alginate hydrogel. The results suggested that microcavitary alginate hydrogel could promote the chondrogenesis. And Arg-Gly-Asp would be promising to ameliorate this culture system for cartilage tissue engineering.
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Affiliation(s)
- Yongchang Yao
- Department of Orthopaedic Surgery, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
- Guangdong Key Laboratory of Orthopaedic Technology and Implant Materials
| | - Lei Zeng
- School of Materials Science and Engineering, South China University of Technology, Guangzhou, China
| | - Yuyang Huang
- Department of Orthopaedic Surgery, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
- Guangdong Key Laboratory of Orthopaedic Technology and Implant Materials
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56
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Reed S, Lau G, Delattre B, Lopez DD, Tomsia AP, Wu BM. Macro- and micro-designed chitosan-alginate scaffold architecture by three-dimensional printing and directional freezing. Biofabrication 2016; 8:015003. [PMID: 26741113 DOI: 10.1088/1758-5090/8/1/015003] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
While many tissue-engineered constructs aim to treat cartilage defects, most involve chondrocyte or stem cell seeding on scaffolds. The clinical application of cell-based techniques is limited due to the cost of maintaining cellular constructs on the shelf, potential immune response to allogeneic cell lines, and autologous chondrocyte sources requiring biopsy from already diseased or injured, scarce tissue. An acellular scaffold that can induce endogenous influx and homogeneous distribution of native stem cells from bone marrow holds great promise for cartilage regeneration. This study aims to develop such an acellular scaffold using designed, channeled architecture that simultaneously models the native zones of articular cartilage and subchondral bone. Highly porous, hydrophilic chitosan-alginate (Ch-Al) scaffolds were fabricated in three-dimensionally printed (3DP) molds designed to create millimeter scale macro-channels. Different polymer preform casting techniques were employed to produce scaffolds from both negative and positive 3DP molds. Macro-channeled scaffolds improved cell suspension distribution and uptake overly randomly porous scaffolds, with a wicking volumetric flow rate of 445.6 ± 30.3 mm(3) s(-1) for aqueous solutions and 177 ± 16 mm(3) s(-1) for blood. Additionally, directional freezing was applied to Ch-Al scaffolds, resulting in lamellar pores measuring 300 μm and 50 μm on the long and short axes, thus creating micrometer scale micro-channels. After directionally freezing Ch-Al solution cast in 3DP molds, the combined macro- and micro-channeled scaffold architecture enhanced cell suspension uptake beyond either macro- or micro-channels alone, reaching a volumetric flow rate of 1782.1 ± 48 mm(3) s(-1) for aqueous solutions and 440.9 ± 0.5 mm(3) s(-1) for blood. By combining 3DP and directional freezing, we can control the micro- and macro-architecture of Ch-Al to drastically improve cell influx into and distribution within the scaffold, while achieving porous zones that mimic articular cartilage zonal architecture. In future applications, precisely controlled micro- and macro-channels have the potential to assist immediate endogenous bone marrow uptake, stimulate chondrogenesis, and encourage vascularization of bone in an osteochondral scaffold.
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Affiliation(s)
- Stephanie Reed
- Department of Bioengineering, University of California, Los Angeles, CA, USA
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57
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Lei Q, Li Z, Xu R, Wang Y, Li H, Wang Y, Liu M, Yang S, Zhan R, Zhao J, Liu B, Hu X, Zhang X, He W, Wu J, Xia H, Luo G. Biomimetic thermoplastic polyurethane porous membrane with hierarchical structure accelerates wound healing by enhancing granulation tissue formation and angiogenesis. RSC Adv 2016. [DOI: 10.1039/c6ra20567d] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Wound dressing with hierarchical structure enhances wound healing.
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Affiliation(s)
- Qiang Lei
- Institute of Burn Research
- State Key Laboratory of Trauma, Burn and Combined Injury
- Southwest Hospital
- the Third Military Medical University
- Chongqing
| | - Zhichao Li
- State Key Laboratory of Polymer Materials Engineering
- Polymer Research Institute of Sichuan University
- Chengdu
- China
| | - Rui Xu
- Institute of Burn Research
- State Key Laboratory of Trauma, Burn and Combined Injury
- Southwest Hospital
- the Third Military Medical University
- Chongqing
| | - Yuzhen Wang
- Institute of Burn Research
- State Key Laboratory of Trauma, Burn and Combined Injury
- Southwest Hospital
- the Third Military Medical University
- Chongqing
| | - Haisheng Li
- Institute of Burn Research
- State Key Laboratory of Trauma, Burn and Combined Injury
- Southwest Hospital
- the Third Military Medical University
- Chongqing
| | - Ying Wang
- Institute of Burn Research
- State Key Laboratory of Trauma, Burn and Combined Injury
- Southwest Hospital
- the Third Military Medical University
- Chongqing
| | - Menglong Liu
- Institute of Burn Research
- State Key Laboratory of Trauma, Burn and Combined Injury
- Southwest Hospital
- the Third Military Medical University
- Chongqing
| | - Sisi Yang
- Institute of Burn Research
- State Key Laboratory of Trauma, Burn and Combined Injury
- Southwest Hospital
- the Third Military Medical University
- Chongqing
| | - Rixing Zhan
- Institute of Burn Research
- State Key Laboratory of Trauma, Burn and Combined Injury
- Southwest Hospital
- the Third Military Medical University
- Chongqing
| | - Jian Zhao
- State Key Laboratory of Polymer Materials Engineering
- Polymer Research Institute of Sichuan University
- Chengdu
- China
| | - Bo Liu
- State Key Laboratory of Polymer Materials Engineering
- Polymer Research Institute of Sichuan University
- Chengdu
- China
| | - Xiaohong Hu
- Institute of Burn Research
- State Key Laboratory of Trauma, Burn and Combined Injury
- Southwest Hospital
- the Third Military Medical University
- Chongqing
| | - Xiaorong Zhang
- Institute of Burn Research
- State Key Laboratory of Trauma, Burn and Combined Injury
- Southwest Hospital
- the Third Military Medical University
- Chongqing
| | - Weifeng He
- Institute of Burn Research
- State Key Laboratory of Trauma, Burn and Combined Injury
- Southwest Hospital
- the Third Military Medical University
- Chongqing
| | - Jun Wu
- Institute of Burn Research
- State Key Laboratory of Trauma, Burn and Combined Injury
- Southwest Hospital
- the Third Military Medical University
- Chongqing
| | - Hesheng Xia
- State Key Laboratory of Polymer Materials Engineering
- Polymer Research Institute of Sichuan University
- Chengdu
- China
| | - Gaoxing Luo
- Institute of Burn Research
- State Key Laboratory of Trauma, Burn and Combined Injury
- Southwest Hospital
- the Third Military Medical University
- Chongqing
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58
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Tatman PD, Gerull W, Sweeney-Easter S, Davis JI, Gee AO, Kim DH. Multiscale Biofabrication of Articular Cartilage: Bioinspired and Biomimetic Approaches. TISSUE ENGINEERING PART B-REVIEWS 2015. [PMID: 26200439 DOI: 10.1089/ten.teb.2015.0142] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Articular cartilage is the load-bearing tissue found inside all articulating joints of the body. It vastly reduces friction and allows for smooth gliding between contacting surfaces. The structure of articular cartilage matrix and cellular composition is zonal and is important for its mechanical properties. When cartilage becomes injured through trauma or disease, it has poor intrinsic healing capabilities. The spectrum of cartilage injury ranges from isolated areas of the joint to diffuse breakdown and the clinical appearance of osteoarthritis. Current clinical treatment options remain limited in their ability to restore cartilage to its normal functional state. This review focuses on the evolution of biomaterial scaffolds that have been used for functional cartilage tissue engineering. In particular, we highlight recent developments in multiscale biofabrication approaches attempting to recapitulate the complex 3D matrix of native articular cartilage tissue. Additionally, we focus on the application of these methods to engineering each zone of cartilage and engineering full-thickness osteochondral tissues for improved clinical implantation. These methods have shown the potential to control individual cell-to-scaffold interactions and drive progenitor cell differentiation into a chondrocyte lineage. The use of these bioinspired nanoengineered scaffolds hold promise for recreation of structure and function on the whole tissue level and may represent exciting new developments for future clinical applications for cartilage injury and restoration.
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Affiliation(s)
- Philip David Tatman
- 1 Department of Bioengineering, University of Washington , Seattle, Washington
| | - William Gerull
- 1 Department of Bioengineering, University of Washington , Seattle, Washington
| | - Sean Sweeney-Easter
- 1 Department of Bioengineering, University of Washington , Seattle, Washington
| | - Jeffrey Isaac Davis
- 1 Department of Bioengineering, University of Washington , Seattle, Washington
| | - Albert O Gee
- 2 Department of Orthopedics and Sports Medicine, University of Washington , Seattle, Washington
| | - Deok-Ho Kim
- 1 Department of Bioengineering, University of Washington , Seattle, Washington.,3 Institute for Stem Cell and Regenerative Medicine, University of Washington , Seattle, Washington
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59
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Reed S, Wu BM. Biological and mechanical characterization of chitosan-alginate scaffolds for growth factor delivery and chondrogenesis. J Biomed Mater Res B Appl Biomater 2015; 105:272-282. [DOI: 10.1002/jbm.b.33544] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2015] [Revised: 08/19/2015] [Accepted: 09/28/2015] [Indexed: 11/08/2022]
Affiliation(s)
- Stephanie Reed
- Department of Bioengineering; University of California, Los Angeles; Los Angeles California
| | - Benjamin M. Wu
- Department of Bioengineering; University of California, Los Angeles; Los Angeles California
- Division of Advanced Prosthodontics; University of California, Los Angeles; Los Angeles California
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60
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Ren K, He C, Xiao C, Li G, Chen X. Injectable glycopolypeptide hydrogels as biomimetic scaffolds for cartilage tissue engineering. Biomaterials 2015; 51:238-249. [DOI: 10.1016/j.biomaterials.2015.02.026] [Citation(s) in RCA: 190] [Impact Index Per Article: 21.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2014] [Revised: 01/23/2015] [Accepted: 02/01/2015] [Indexed: 01/10/2023]
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61
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Xu R, Luo G, Xia H, He W, Zhao J, Liu B, Tan J, Zhou J, Liu D, Wang Y, Yao Z, Zhan R, Yang S, Wu J. Novel bilayer wound dressing composed of silicone rubber with particular micropores enhanced wound re-epithelialization and contraction. Biomaterials 2015; 40:1-11. [DOI: 10.1016/j.biomaterials.2014.10.077] [Citation(s) in RCA: 190] [Impact Index Per Article: 21.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2014] [Revised: 10/21/2014] [Accepted: 10/23/2014] [Indexed: 01/29/2023]
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62
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Cao L, Cao B, Lu C, Wang G, Yu L, Ding J. An injectable hydrogel formed by in situ cross-linking of glycol chitosan and multi-benzaldehyde functionalized PEG analogues for cartilage tissue engineering. J Mater Chem B 2014; 3:1268-1280. [PMID: 32264478 DOI: 10.1039/c4tb01705f] [Citation(s) in RCA: 157] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
In this study, a multi-benzaldehyde functionalized poly(ethylene glycol) analogue, poly(ethylene oxide-co-glycidol)-CHO (poly(EO-co-Gly)-CHO), was designed and synthesized for the first time, and was applied as a cross-linker to develop an injectable hydrogel system. Simply mixing two aqueous precursor solutions of glycol chitosan (GC) and poly(EO-co-Gly)-CHO led to the formation of chemically cross-linked hydrogels under physiological conditions in situ. The cross-linking was attributed to a Schiff's base reaction between amino groups of GC and aldehyde groups of poly(EO-co-Gly)-CHO. The gelation time, water uptake, mechanical properties and network morphology of the GC/poly(EO-co-Gly) hydrogels were well modulated by varying the concentration of poly(EO-co-Gly)-CHO. Degradation of the in situ formed hydrogels was confirmed both in vitro and in vivo. The integrity of the GC/poly(EO-co-Gly) hydrogels was subcutaneously maintained for up to 12 weeks in ICR mice. The feasibility of encapsulating chondrocytes in the GC/poly(EO-co-Gly) hydrogels was assessed. Live/Dead staining assay demonstrated that the chondrocytes were highly viable in the hydrogels, and no dedifferentiation of chondrocytes was observed after 2 weeks of in vitro culture. Cell counting kit-8 assay gave evidence of the remarkably sustained proliferation of the encapsulated chondrocytes. Maintenance of the chondrocyte phenotype was also confirmed with an examination of characteristic gene expression. These features suggest that GC/poly(EO-co-Gly) hydrogels hold potential as an artificial extracellular matrix for cartilage tissue engineering.
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Affiliation(s)
- Luping Cao
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200433, China.
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63
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Guillaume O, Naqvi SM, Lennon K, Buckley CT. Enhancing cell migration in shape-memory alginate–collagen composite scaffolds: In vitro and ex vivo assessment for intervertebral disc repair. J Biomater Appl 2014; 29:1230-46. [DOI: 10.1177/0885328214557905] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Lower lumbar disc disorders pose a significant problem in an aging society with substantial socioeconomic consequences. Both inner tissue (nucleus pulposus) and outer tissue (annulus fibrosus) of the intervertebral disc are affected by such debilitating disorders and can lead to disc herniation and lower back pain. In this study, we developed an alginate–collagen composite porous scaffold with shape-memory properties to fill defects occurring in annulus fibrosus tissue of degenerated intervertebral discs, which has the potential to be administered using minimal invasive surgery. In the first part of this work, we assessed how collagen incorporation on preformed alginate scaffolds influences the physical properties of the final composite scaffold. We also evaluated the ability of annulus fibrosus cells to attach, migrate, and proliferate on the composite alginate–collagen scaffolds compared to control scaffolds (alginate only). In vitro experiments, performed in intervertebral disc-like microenvironmental conditions (low glucose and low oxygen concentrations), revealed that for alginate only scaffolds, annulus fibrosus cells agglomerated in clusters with limited infiltration and migration capacity. In comparison, for alginate–collagen scaffolds, annulus fibrosus cells readily attached and colonized constructs, while preserving their typical fibroblastic-like cell morphology with spreading behavior and intense cytoskeleton expression. In a second part of this study, we investigated the effects of alginate–collagen scaffold when seeded with bone marrow derived mesenchymal stem cells. In vitro, we observed that alginate–collagen porous scaffolds supported cell proliferation and extracellular matrix deposition (collagen type I), with secretion amplified by the local release of transforming growth factor-β3. In addition, when cultured in ex vivo organ defect model, alginate–collagen scaffolds maintained viability of transplanted mesenchymal stem cells for up to 5 weeks. Taken together, these findings illustrate the advantages of incorporating collagen as a means to enhance cell migration and proliferation in porous scaffolds which could be used to augment tissue repair strategies.
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Affiliation(s)
- Olivier Guillaume
- Trinity Centre for Bioengineering, Trinity Biomedical Sciences Institute, Trinity College Dublin, Ireland
- Department of Mechanical Engineering, School of Engineering, Trinity College Dublin, Ireland
| | - Syeda Masooma Naqvi
- Trinity Centre for Bioengineering, Trinity Biomedical Sciences Institute, Trinity College Dublin, Ireland
- Department of Mechanical Engineering, School of Engineering, Trinity College Dublin, Ireland
| | - Kerri Lennon
- Trinity Centre for Bioengineering, Trinity Biomedical Sciences Institute, Trinity College Dublin, Ireland
- Department of Mechanical Engineering, School of Engineering, Trinity College Dublin, Ireland
| | - Conor Timothy Buckley
- Trinity Centre for Bioengineering, Trinity Biomedical Sciences Institute, Trinity College Dublin, Ireland
- Department of Mechanical Engineering, School of Engineering, Trinity College Dublin, Ireland
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64
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Zeng L, Chen X, Zhang Q, Yu F, Li Y, Yao Y. Redifferentiation of dedifferentiated chondrocytes in a novel three‐dimensional microcavitary hydrogel. J Biomed Mater Res A 2014; 103:1693-702. [DOI: 10.1002/jbm.a.35309] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2014] [Revised: 07/31/2014] [Accepted: 08/06/2014] [Indexed: 11/09/2022]
Affiliation(s)
- Lei Zeng
- School of Materials Science and Engineering, South China University of TechnologyGuangzhou510641 China
- National Engineering Research Center for Tissue Restoration and ReconstructionGuangzhou510006 China
| | - Xiaofeng Chen
- School of Materials Science and Engineering, South China University of TechnologyGuangzhou510641 China
- National Engineering Research Center for Tissue Restoration and ReconstructionGuangzhou510006 China
| | - Qing Zhang
- School of Materials Science and Engineering, South China University of TechnologyGuangzhou510641 China
- National Engineering Research Center for Tissue Restoration and ReconstructionGuangzhou510006 China
| | - Feng Yu
- School of Materials Science and Engineering, South China University of TechnologyGuangzhou510641 China
- National Engineering Research Center for Tissue Restoration and ReconstructionGuangzhou510006 China
| | - Yuli Li
- School of Materials Science and Engineering, South China University of TechnologyGuangzhou510641 China
- National Engineering Research Center for Tissue Restoration and ReconstructionGuangzhou510006 China
| | - Yongchang Yao
- School of Materials Science and Engineering, South China University of TechnologyGuangzhou510641 China
- National Engineering Research Center for Tissue Restoration and ReconstructionGuangzhou510006 China
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65
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Qian D, Bai B, Yan G, Zhang S, Liu Q, Chen Y, Tan X, Zeng Y. Construction of doxycycline-mediated BMP-2 transgene combining with APA microcapsules for bone repair. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2014; 44:270-6. [PMID: 25092431 DOI: 10.3109/21691401.2014.942458] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Dongyang Qian
- a Department of Orthopaedics , the First Affiliated Hospital, Guangzhou Medical University , Guangzhou , P. R. China
| | - Bo Bai
- a Department of Orthopaedics , the First Affiliated Hospital, Guangzhou Medical University , Guangzhou , P. R. China
| | - Guangbin Yan
- a Department of Orthopaedics , the First Affiliated Hospital, Guangzhou Medical University , Guangzhou , P. R. China
| | - Shujiang Zhang
- a Department of Orthopaedics , the First Affiliated Hospital, Guangzhou Medical University , Guangzhou , P. R. China
| | - Qi Liu
- a Department of Orthopaedics , the First Affiliated Hospital, Guangzhou Medical University , Guangzhou , P. R. China
| | - Yi Chen
- a Department of Orthopaedics , the First Affiliated Hospital, Guangzhou Medical University , Guangzhou , P. R. China
| | - Xiaobo Tan
- a Department of Orthopaedics , the First Affiliated Hospital, Guangzhou Medical University , Guangzhou , P. R. China
| | - Yanjun Zeng
- b Biomechanics & Medical Information Institute, Beijing University of Technology , Beijing , P. R. China
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