51
|
Raftery RM, Walsh DP, Castaño IM, Heise A, Duffy GP, Cryan SA, O'Brien FJ. Delivering Nucleic-Acid Based Nanomedicines on Biomaterial Scaffolds for Orthopedic Tissue Repair: Challenges, Progress and Future Perspectives. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2016; 28:5447-5469. [PMID: 26840618 DOI: 10.1002/adma.201505088] [Citation(s) in RCA: 74] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2015] [Revised: 11/27/2015] [Indexed: 06/05/2023]
Abstract
As well as acting to fill defects and allow for cell infiltration and proliferation in regenerative medicine, biomaterial scaffolds can also act as carriers for therapeutics, further enhancing their efficacy. Drug and protein delivery on scaffolds have shown potential, however, supraphysiological quantities of therapeutic are often released at the defect site, causing off-target side effects and cytotoxicity. Gene therapy involves the introduction of foreign genes into a cell in order to exert an effect; either replacing a missing gene or modulating expression of a protein. State of the art gene therapy also encompasses manipulation of the transcriptome by harnessing RNA interference (RNAi) therapy. The delivery of nucleic acid nanomedicines on biomaterial scaffolds - gene-activated scaffolds -has shown potential for use in a variety of tissue engineering applications, but as of yet, have not reached clinical use. The current state of the art in terms of biomaterial scaffolds and delivery vector materials for gene therapy is reviewed, and the limitations of current procedures discussed. Future directions in the clinical translation of gene-activated scaffolds are also considered, with a particular focus on bone and cartilage tissue regeneration.
Collapse
Affiliation(s)
- Rosanne M Raftery
- Tissue Engineering Research Group (TERG), Dept. of Anatomy, Royal College of Surgeons in Ireland (RCSI), 123, St. Stephens Green, Dublin 2, Dublin, Ireland
- Trinity Centre for Bioengineering (TCBE), Trinity College Dublin, Dublin 2, Dublin, Ireland
- Advanced Materials and Bioengineering Research Centre (AMBER), RCSI and TCD, Dublin, Ireland
- Drug Delivery and Advanced Materials Research Team, School of Pharmacy, Royal College of Surgeons in Ireland, 123, St. Stephens Green, Dublin 2, Dublin, Ireland
- Centre for Research in Medical Devices (CÚRAM), National University of Ireland Galway, Galway, Ireland
| | - David P Walsh
- Tissue Engineering Research Group (TERG), Dept. of Anatomy, Royal College of Surgeons in Ireland (RCSI), 123, St. Stephens Green, Dublin 2, Dublin, Ireland
- Trinity Centre for Bioengineering (TCBE), Trinity College Dublin, Dublin 2, Dublin, Ireland
- Advanced Materials and Bioengineering Research Centre (AMBER), RCSI and TCD, Dublin, Ireland
- Drug Delivery and Advanced Materials Research Team, School of Pharmacy, Royal College of Surgeons in Ireland, 123, St. Stephens Green, Dublin 2, Dublin, Ireland
- Centre for Research in Medical Devices (CÚRAM), National University of Ireland Galway, Galway, Ireland
| | - Irene Mencía Castaño
- Tissue Engineering Research Group (TERG), Dept. of Anatomy, Royal College of Surgeons in Ireland (RCSI), 123, St. Stephens Green, Dublin 2, Dublin, Ireland
- Trinity Centre for Bioengineering (TCBE), Trinity College Dublin, Dublin 2, Dublin, Ireland
- Advanced Materials and Bioengineering Research Centre (AMBER), RCSI and TCD, Dublin, Ireland
| | - Andreas Heise
- Tissue Engineering Research Group (TERG), Dept. of Anatomy, Royal College of Surgeons in Ireland (RCSI), 123, St. Stephens Green, Dublin 2, Dublin, Ireland
| | - Garry P Duffy
- Tissue Engineering Research Group (TERG), Dept. of Anatomy, Royal College of Surgeons in Ireland (RCSI), 123, St. Stephens Green, Dublin 2, Dublin, Ireland
- Trinity Centre for Bioengineering (TCBE), Trinity College Dublin, Dublin 2, Dublin, Ireland
- Advanced Materials and Bioengineering Research Centre (AMBER), RCSI and TCD, Dublin, Ireland
| | - Sally-Ann Cryan
- Tissue Engineering Research Group (TERG), Dept. of Anatomy, Royal College of Surgeons in Ireland (RCSI), 123, St. Stephens Green, Dublin 2, Dublin, Ireland
- Trinity Centre for Bioengineering (TCBE), Trinity College Dublin, Dublin 2, Dublin, Ireland
- Drug Delivery and Advanced Materials Research Team, School of Pharmacy, Royal College of Surgeons in Ireland, 123, St. Stephens Green, Dublin 2, Dublin, Ireland
- Centre for Research in Medical Devices (CÚRAM), National University of Ireland Galway, Galway, Ireland
| | - Fergal J O'Brien
- Tissue Engineering Research Group (TERG), Dept. of Anatomy, Royal College of Surgeons in Ireland (RCSI), 123, St. Stephens Green, Dublin 2, Dublin, Ireland
- Trinity Centre for Bioengineering (TCBE), Trinity College Dublin, Dublin 2, Dublin, Ireland
- Advanced Materials and Bioengineering Research Centre (AMBER), RCSI and TCD, Dublin, Ireland
| |
Collapse
|
52
|
Hypoxia Potentiates Anabolic Effects of Exogenous Hyaluronic Acid in Rat Articular Cartilage. Int J Mol Sci 2016; 17:ijms17071013. [PMID: 27347945 PMCID: PMC4964389 DOI: 10.3390/ijms17071013] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2016] [Revised: 06/18/2016] [Accepted: 06/21/2016] [Indexed: 01/20/2023] Open
Abstract
Hyaluronic acid (HA) is used clinically to treat osteoarthritis (OA), but its pharmacological effects under hypoxic conditions remain unclear. Articular chondrocytes in patients with OA are exposed to a hypoxic environment. This study investigated whether hypoxia could potentiate the anabolic effects of exogenous HA in rat articular cartilage and whether these mechanisms involved HA receptors. HA under hypoxic conditions significantly enhanced the expression of extracellular matrix genes and proteins in explant culture, as shown by real-time reverse transcription-polymerase chain reaction (RT-PCR), Western blotting, and dimethylmethylene blue (DMMB) assays. Staining with Safranin-O and immunohistochemical staining with antibody to type II collagen were also enhanced in pellet culture. The expression of CD44 was increased by hypoxia and significantly suppressed by transfection with siRNAs targeting hypoxia-inducible factor 1 alpha (siHIF-1α). These findings indicate that hypoxia potentiates the anabolic effects of exogenous HA by a mechanism in which HIF-1α positively regulates the expression of CD44, enhancing the binding affinity for exogenous HA. The anabolic effects of exogenous HA may increase as OA progresses.
Collapse
|
53
|
Yuan L, Li B, Yang J, Ni Y, Teng Y, Guo L, Fan H, Fan Y, Zhang X. Effects of Composition and Mechanical Property of Injectable Collagen I/II Composite Hydrogels on Chondrocyte Behaviors. Tissue Eng Part A 2016; 22:899-906. [DOI: 10.1089/ten.tea.2015.0513] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Affiliation(s)
- Lu Yuan
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu, China
| | - Bao Li
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu, China
| | - Jirong Yang
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu, China
| | - Yilu Ni
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu, China
| | - Yingying Teng
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu, China
| | - Likun Guo
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu, China
| | - Hongsong Fan
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu, China
| | - Yujiang Fan
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu, China
| | - Xingdong Zhang
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu, China
| |
Collapse
|
54
|
Modular Tissue Assembly Strategies for Biofabrication of Engineered Cartilage. Ann Biomed Eng 2016; 45:100-114. [DOI: 10.1007/s10439-016-1609-3] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2016] [Accepted: 04/02/2016] [Indexed: 12/19/2022]
|
55
|
van den Akker GGH, Surtel DAM, Cremers A, Richardson SM, Hoyland JA, van Rhijn LW, Voncken JW, Welting TJM. Novel Immortal Cell Lines Support Cellular Heterogeneity in the Human Annulus Fibrosus. PLoS One 2016; 11:e0144497. [PMID: 26794306 PMCID: PMC4721917 DOI: 10.1371/journal.pone.0144497] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Accepted: 11/19/2015] [Indexed: 12/11/2022] Open
Abstract
Introduction Loss of annulus fibrosus (AF) integrity predisposes to disc herniation and is associated with IVD degeneration. Successful implementation of biomedical intervention therapy requires in-depth knowledge of IVD cell biology. We recently generated unique clonal human nucleus pulposus (NP) cell lines. Recurring functional cellular phenotypes from independent donors provided pivotal evidence for cell heterogeneity in the mature human NP. In this study we aimed to generate and characterize immortal cell lines for the human AF from matched donors. Methods Non-degenerate healthy disc material was obtained as surplus surgical material. AF cells were immortalized by simian virus Large T antigen (SV40LTAg) and human telomerase (hTERT) expression. Early passage cells and immortalized cell clones were characterized based on marker gene expression under standardized culturing and in the presence of Transforming Growth factor β (TGFβ). Results The AF-specific expression signature included COL1A1, COL5A1, COL12A1, SFRP2 and was largely maintained in immortal AF cell lines. Remarkably, TGFβ induced rapid 3D sheet formation in a subgroup of AF clones. This phenotype was associated with inherent differences in Procollagen type I processing and maturation, and correlated with differential mRNA expression of Prolyl 4-hydroxylase alpha polypeptide 1 and 3 (P4HA1,3) and Lysyl oxidase (LOX) between clones and differential P4HA3 protein expression between AF cells in histological sections. Conclusion We report for the first time the generation of representative human AF cell lines. Gene expression profile analysis and functional comparison of AF clones revealed variation between immortalized cells and suggests phenotypic heterogeneity in the human AF. Future characterization of AF cellular (sub-)populations aims to combine identification of additional specific AF marker genes and their biological relevance. Ultimately this knowledge will contribute to clinical application of cell-based technology in IVD repair.
Collapse
Affiliation(s)
- Guus G. H. van den Akker
- Department of Orthopaedic Surgery, Maastricht University Medical Centre, Maastricht, the Netherlands
- Department of Molecular Genetics, Maastricht University Medical Centre, Maastricht, the Netherlands
| | - Don A. M. Surtel
- Department of Orthopaedic Surgery, Maastricht University Medical Centre, Maastricht, the Netherlands
| | - Andy Cremers
- Department of Orthopaedic Surgery, Maastricht University Medical Centre, Maastricht, the Netherlands
| | - Stephen M. Richardson
- Centre for Tissue Injury and Repair, Institute of Inflammation and Repair, The University of Manchester, Manchester, United Kingdom
| | - Judith A. Hoyland
- Centre for Tissue Injury and Repair, Institute of Inflammation and Repair, The University of Manchester, Manchester, United Kingdom
| | - Lodewijk W. van Rhijn
- Department of Orthopaedic Surgery, Maastricht University Medical Centre, Maastricht, the Netherlands
| | - Jan Willem Voncken
- Department of Molecular Genetics, Maastricht University Medical Centre, Maastricht, the Netherlands
- * E-mail: (JWV); (TJMW)
| | - Tim J. M. Welting
- Department of Orthopaedic Surgery, Maastricht University Medical Centre, Maastricht, the Netherlands
- * E-mail: (JWV); (TJMW)
| |
Collapse
|
56
|
Cellular supplementation technologies for painful spine disorders. PM R 2016; 7:S19-S25. [PMID: 25864656 DOI: 10.1016/j.pmrj.2015.01.022] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2014] [Revised: 01/21/2015] [Accepted: 01/23/2015] [Indexed: 11/23/2022]
Abstract
Low back pain affects more than 80% of adults. A proportion of these adults develops chronic low back pain (CLBP) and becomes disabled by their condition. CLBP is expensive to diagnose and treat and in terms of associated loss of productivity in the work place setting by affected individuals. Although challenging, the source of CLBP can be identified. Contemporary literature contains several studies that have established prevalence estimates for various structural sources of CLBP. In young adults, the intervertebral disk is a common source of CLBP, once it incurs annular injury that heals incompletely. Effective treatment for painful disks currently is an unmet clinical need. In older adults, the facet and sacroiliac joints are more commonly responsible for CLBP. Although certain minimally invasive techniques do exist for these painful joints, an effective restorative intervention has yet to be established. Annular injury precipitates a physiologic response that can lead to a catabolic state within the disk that impairs disk restoration. Cell loss is a feature of this process as well as the pathophysiology associated with painful facet and sacroiliac joints. Cellular supplementation is an attractive treatment strategy to initiate the repair of an injured lumbosacral structure. The introduction of exogenous cells may lead to increased extracelluar matrix production and reduced pain and disability in diskogenic CLBP. Compelling data in animal studies have been produced, stimulating Food and Drug Administration-regulated trials in humans. Numerous questions remain regarding cell viability and sufficient native nutrients to support these cells. Clinical research protocols have focused predominantly on diskogenic CLBP, and very few have addressed painful facet and/or sacroiliac joints.
Collapse
|
57
|
Sridhar. BV, Dailing EA, Brock JL, Stansbury JW, Randolph MA, Anseth KS. A Biosynthetic Scaffold that Facilitates Chondrocyte-Mediated Degradation and Promotes Articular Cartilage Extracellular Matrix Deposition. REGENERATIVE ENGINEERING AND TRANSLATIONAL MEDICINE 2015; 1:11-21. [PMID: 26900597 PMCID: PMC4758520 DOI: 10.1007/s40883-015-0002-3] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Articular cartilage remains a significant clinical challenge to repair because of its limited self-healing capacity. Interest has grown in the delivery of autologous chondrocytes to cartilage defects, and combining cell-based therapies with scaffolds that capture aspects of native tissue and allow cell-mediated remodeling could improve outcomes. Currently, scaffold-based therapies with encapsulated chondrocytes permit matrix production; however, resorption of the scaffold often does not match the rate of matrix production by chondrocytes, which can limit functional tissue regeneration. Here, we designed a hybrid biosynthetic system consisting of poly (ethylene glycol) (PEG) endcapped with thiols and crosslinked by norbornene-functionalized gelatin via a thiol-ene photopolymerization. The protein crosslinker was selected to facilitate chondrocyte-mediated scaffold remodeling and matrix deposition. Gelatin was functionalized with norbornene to varying degrees (~4-17 norbornenes/gelatin), and the shear modulus of the resulting hydrogels was characterized (<0.1-0.5 kPa). Degradation of the crosslinked PEG-gelatin hydrogels by chondrocyte-secreted enzymes was confirmed by gel permeation chromatography. Finally, chondrocytes encapsulated in these biosynthetic scaffolds showed significantly increased glycosaminoglycan deposition over just 14 days of culture, while maintaining high levels of viability and producing a distributed matrix. These results indicate the potential of a hybrid PEG-gelatin hydrogel to permit chondrocyte-mediated remodeling and promote articular cartilage matrix production. Tunable scaffolds that can easily permit chondrocyte-mediated remodeling may be useful in designing treatment options for cartilage tissue engineering applications.
Collapse
Affiliation(s)
- Balaji V. Sridhar.
- Department of Chemical and Biological Engineering, University of Colorado, Boulder, Colorado
- BioFrontiers Institute, University of Colorado, Boulder, Colorado
| | - Eric A. Dailing
- Department of Chemical and Biological Engineering, University of Colorado, Boulder, Colorado
| | - J. Logan Brock
- Department of Chemical and Biological Engineering, University of Colorado, Boulder, Colorado
- BioFrontiers Institute, University of Colorado, Boulder, Colorado
| | - Jeffrey W. Stansbury
- Department of Chemical and Biological Engineering, University of Colorado, Boulder, Colorado
- Department of Craniofacial Biology, School of Dental Medicine, University of Colorado, Aurora, Colorado
| | - Mark A. Randolph
- Department of Orthopedic Surgery, Laboratory for Musculoskeletal Tissue Engineering, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
- Plastic Surgery Research Laboratory, Division of Plastic Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
| | - Kristi S. Anseth
- Department of Chemical and Biological Engineering, University of Colorado, Boulder, Colorado
- BioFrontiers Institute, University of Colorado, Boulder, Colorado
- Howard Hughes Medical Institute, University of Colorado, Boulder, Colorado
| |
Collapse
|
58
|
Karimi T, Barati D, Karaman O, Moeinzadeh S, Jabbari E. A developmentally inspired combined mechanical and biochemical signaling approach on zonal lineage commitment of mesenchymal stem cells in articular cartilage regeneration. Integr Biol (Camb) 2015; 7:112-27. [PMID: 25387395 DOI: 10.1039/c4ib00197d] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Articular cartilage is organized into multiple zones including superficial, middle and calcified zones with distinct cellular and extracellular components to impart lubrication, compressive strength, and rigidity for load transmission to bone, respectively. During native cartilage tissue development, changes in biochemical, mechanical, and cellular factors direct the formation of stratified structure of articular cartilage. The objective of this work was to investigate the effect of combined gradients in cell density, matrix stiffness, and zone-specific growth factors on the zonal organization of articular cartilage. Human mesenchymal stem cells (hMSCs) were encapsulated in acrylate-functionalized lactide-chain-extended polyethylene glycol (SPELA) gels simulating cell density and stiffness of the superficial, middle and calcified zones. The cell-encapsulated gels were cultivated in a medium supplemented with growth factors specific to each zone and the expression of zone-specific markers was measured with incubation time. Encapsulation of 60 × 10(6) cells per mL hMSCs in a soft gel (80 kPa modulus) and cultivation with a combination of TGF-β1 (3 ng mL(-1)) and BMP-7 (100 ng mL(-1)) led to the expression of markers for the superficial zone. Conversely, encapsulation of 15 × 10(6) cells per mL hMSCs in a stiff gel (320 MPa modulus) and cultivation with a combination of TGF-β1 (30 ng mL(-1)) and hydroxyapatite (3%) led to the expression of markers for the calcified zone. Further, encapsulation of 20 × 10(6) cells per mL hMSCs in a gel with 2.1 MPa modulus and cultivation with a combination of TGF-β1 (30 ng mL(-1)) and IGF-1 (100 ng mL(-1)) led to up-regulation of the middle zone markers. Results demonstrate that a developmental approach with gradients in cell density, matrix stiffness, and zone-specific growth factors can potentially regenerate zonal structure of the articular cartilage.
Collapse
Affiliation(s)
- Tahereh Karimi
- Biomimetic Materials and Tissue Engineering Laboratory, Department of Chemical Engineering, University of South Carolina, Swearingen Engineering Center, Rm 2C11, Columbia, SC 29208, USA.
| | | | | | | | | |
Collapse
|
59
|
Mazunin D, Broguiere N, Zenobi-Wong M, Bode JW. Synthesis of Biocompatible PEG Hydrogels by pH-Sensitive Potassium Acyltrifluoroborate (KAT) Amide Ligations. ACS Biomater Sci Eng 2015; 1:456-462. [DOI: 10.1021/acsbiomaterials.5b00145] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Dmitry Mazunin
- Laboratorium
für Organische Chemie, Department of Chemistry and Applied
Biosciences, ETH−Zürich, Vladimir-Prelog-Weg 3, 8093 Zürich, Switzerland
| | - Nicolas Broguiere
- Cartilage
Engineering and Regeneration Laboratory, Department of Health Science
and Technology, ETH−Zürich, Otto-Stern-Weg 7, 8093 Zürich, Switzerland
| | - Marcy Zenobi-Wong
- Cartilage
Engineering and Regeneration Laboratory, Department of Health Science
and Technology, ETH−Zürich, Otto-Stern-Weg 7, 8093 Zürich, Switzerland
| | - Jeffrey W. Bode
- Laboratorium
für Organische Chemie, Department of Chemistry and Applied
Biosciences, ETH−Zürich, Vladimir-Prelog-Weg 3, 8093 Zürich, Switzerland
| |
Collapse
|
60
|
Sridhar BV, Brock JL, Silver JS, Leight JL, Randolph MA, Anseth KS. Development of a cellularly degradable PEG hydrogel to promote articular cartilage extracellular matrix deposition. Adv Healthc Mater 2015; 4:702-13. [PMID: 25607633 PMCID: PMC4487633 DOI: 10.1002/adhm.201400695] [Citation(s) in RCA: 119] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2014] [Revised: 12/19/2014] [Indexed: 11/11/2022]
Abstract
Healing articular cartilage remains a significant clinical challenge because of its limited self-healing capacity. While delivery of autologous chondrocytes to cartilage defects has received growing interest, combining cell-based therapies with scaffolds that capture aspects of native tissue and promote cell-mediated remodeling could improve outcomes. Currently, scaffold-based therapies with encapsulated chondrocytes permit matrix production; however, resorption of the scaffold does not match the rate of production by cells leading to generally low extracellular matrix outputs. Here, a poly (ethylene glycol) (PEG) norbornene hydrogel is functionalized with thiolated transforming growth factor (TGF-β1) and cross-linked by an MMP-degradable peptide. Chondrocytes are co-encapsulated with a smaller population of mesenchymal stem cells, with the goal of stimulating matrix production and increasing bulk mechanical properties of the scaffold. The co-encapsulated cells cleave the MMP-degradable target sequence more readily than either cell population alone. Relative to non-degradable gels, cellularly degraded materials show significantly increased glycosaminoglycan and collagen deposition over just 14 d of culture, while maintaining high levels of viability and producing a more widely-distributed matrix. These results indicate the potential of an enzymatically degradable, peptide-functionalized PEG hydrogel to locally influence and promote cartilage matrix production over a short period. Scaffolds that permit cell-mediated remodeling may be useful in designing treatment options for cartilage tissue engineering applications.
Collapse
Affiliation(s)
- Balaji V. Sridhar
- Department of Chemical and Biological Engineering, and the Biofrontiers Institute, University of Colorado, 596 UCB, Boulder, Colorado, 80303-0596, USA
| | - J. Logan Brock
- Department of Chemical and Biological Engineering, and the Biofrontiers Institute, University of Colorado, 596 UCB, Boulder, Colorado, 80303-0596, USA
| | - Jason S. Silver
- Department of Chemical and Biological Engineering, and the Biofrontiers Institute, University of Colorado, 596 UCB, Boulder, Colorado, 80303-0596, USA
| | - Jennifer L. Leight
- Department of Chemical and Biological Engineering, and the Biofrontiers Institute, University of Colorado, 596 UCB, Boulder, Colorado, 80303-0596, USA. Department of Biomedical Engineering and Comprehensive Cancer Center, The Ohio State University, 291 Bevis Hall, Columbus, Ohio, 43210 USA. The Howard Hughes Medical Institute, University of Colorado, 596 UCB, Boulder, Colorado, 80303-1904, USA
| | - Mark A. Randolph
- Department of Orthopaedic Surgery, Laboratory for Musculoskeletal Tissue Engineering, Massachusetts General Hospital, Harvard Medical School, 55 Fruit St., WAC 435, Boston, Massachusetts, 02114, USA. Division of Plastic Surgery, Plastic Surgery Research Laboratory, Massachusetts General Hospital, Harvard Medical School, 15 Parkman St., WACC 453, Boston, Massachusetts, 02114, USA
| | - Kristi S. Anseth
- Department of Chemical and Biological Engineering, and the Biofrontiers Institute, University of Colorado, 596 UCB, Boulder, Colorado, 80303-0596, USA. The Howard Hughes Medical Institute, University of Colorado, 596 UCB, Boulder, Colorado, 80303-1904, USA
| |
Collapse
|
61
|
Bean AC, Tuan RS. Fiber diameter and seeding density influence chondrogenic differentiation of mesenchymal stem cells seeded on electrospun poly(ε-caprolactone) scaffolds. ACTA ACUST UNITED AC 2015; 10:015018. [PMID: 25634427 DOI: 10.1088/1748-6041/10/1/015018] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Chondrogenic differentiation of mesenchymal stem cells is strongly influenced by the surrounding chemical and structural milieu. Since the majority of the native cartilage extracellular matrix is composed of nanofibrous collagen fibrils, much of recent cartilage tissue engineering research has focused on developing and utilizing scaffolds with similar nanoscale architecture. However, current literature lacks consensus regarding the ideal fiber diameter, with differences in culture conditions making it difficult to compare between studies. Here, we aimed to develop a more thorough understanding of how cell-cell and cell-biomaterial interactions drive in vitro chondrogenic differentiation of bone-marrow-derived mesenchymal stem cells (MSCs). Electrospun poly(ε-caprolactone) microfibers (4.3 ± 0.8 µm diameter, 90 μm(2) pore size) and nanofibers (440 ± 20 nm diameter, 1.2 μm(2) pore size) were seeded with MSCs at initial densities ranging from 1 × 10(5) to 4 × 10(6) cells cm(-3)-scaffold and cultured under transforming growth factor-β (TGF-β) induced chondrogenic conditions for 3 or 6 weeks. Chondrogenic gene expression, cellular proliferation, as well as sulfated glycosaminoglycan and collagen production were enhanced on microfiber in comparison to nanofiber scaffolds, with high initial seeding densities being required for significant chondrogenic differentiation and extracellular matrix deposition. Both cell-cell and cell-material interactions appear to play important roles in chondrogenic differentiation of MSCs in vitro and consideration of several variables simultaneously is essential for understanding cell behavior in order to develop an optimal tissue engineering strategy.
Collapse
Affiliation(s)
- Allison C Bean
- Center for Cellular and Molecular Engineering, Department of Orthopaedic Surgery, University of Pittsburgh School of Medicine, 450 Technology Drive, Room 221 Pittsburgh, PA 15219 USA
| | | |
Collapse
|
62
|
Shi Y, Ma J, Zhang X, Li H, Jiang L, Qin J. Hypoxia combined with spheroid culture improves cartilage specific function in chondrocytes. Integr Biol (Camb) 2015; 7:289-97. [PMID: 25614382 DOI: 10.1039/c4ib00273c] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Controlling the chondrocyte phenotype and function in a physiologically relevant microenvironment remains a major challenge for cartilage repair in tissue engineering applications. This work presents a straightforward strategy to create a high throughput concave microwell array used for generating multicellular spheroids of chondrocytes and facilitating the maintenance of the articular chondrocyte phenotype and function by combining 3D spheroid culture with hypoxia. The polydimethylsiloxane (PDMS) concave microwells were simply produced from a concave SU-8 template fabricated using a soft-lithography approach and easily adopted for size-controlled spheroid culture. 3D spheroid culture was observed to facilitate the cartilage-specific phenotype and function maintenance as compared to 2D monolayer culture. Combining hypoxia with spheroid culture markedly increased the expressions of cartilage-specific collagen II and aggrecan at protein and mRNA levels. The hypoxia-inducible factor (HIF) signaling pathway was found to get involved in phenotype maintenance, metabolism and differentiation of chondrocytes by regulating HIF-1α and HIF-2α, respectively. The established approach provides a useful platform for a wide range of applications in the field of cartilage biology, stem cell research and high throughput 3D drug testing in cancer.
Collapse
Affiliation(s)
- Yang Shi
- Department of Biotechnology, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China.
| | | | | | | | | | | |
Collapse
|
63
|
Yuan X, Serra RA, Yang S. Function and regulation of primary cilia and intraflagellar transport proteins in the skeleton. Ann N Y Acad Sci 2015; 1335:78-99. [PMID: 24961486 PMCID: PMC4334369 DOI: 10.1111/nyas.12463] [Citation(s) in RCA: 72] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Primary cilia are microtubule-based organelles that project from the cell surface to enable transduction of various developmental signaling pathways. The process of intraflagellar transport (IFT) is crucial for the building and maintenance of primary cilia. Ciliary dysfunction has been found in a range of disorders called ciliopathies, some of which display severe skeletal dysplasias. In recent years, interest has grown in uncovering the function of primary cilia/IFT proteins in bone development, mechanotransduction, and cellular regulation. We summarize recent advances in understanding the function of cilia and IFT proteins in the regulation of cell differentiation in osteoblasts, osteocytes, chondrocytes, and mesenchymal stem cells (MSCs). We also discuss the mechanosensory function of cilia and IFT proteins in bone cells, cilia orientation, and other functions of cilia in chondrocytes.
Collapse
Affiliation(s)
- Xue Yuan
- Department of Oral Biology, School of Dental Medicine, University at Buffalo, The State University of New York, Buffalo, NY
| | - Rosa A. Serra
- Department of Cell, Developmental, and Integrative Biology, University of Alabama at Birmingham, Birmingham, Alabama
| | - Shuying Yang
- Department of Oral Biology, School of Dental Medicine, University at Buffalo, The State University of New York, Buffalo, NY
- Developmental Genomics Group, New York State Center of Excellence in Bioinformatics and Life Sciences, University at Buffalo, The State University of New York, Buffalo, NY
| |
Collapse
|
64
|
Liu J, Lin H, Li X, Fan Y, Zhang X. Chondrocytes behaviors within type I collagen microspheres and bulk hydrogels: an in vitro study. RSC Adv 2015. [DOI: 10.1039/c5ra04496k] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Cell niche, which is considered to be critical to the proliferation and differentiation of cells, is one of the most important aspects for the design and development of ideal scaffolds in tissue engineering.
Collapse
Affiliation(s)
- Jun Liu
- National Engineering Research Center for Biomaterials
- Sichuan University
- Chengdu
- China
| | - Hai Lin
- National Engineering Research Center for Biomaterials
- Sichuan University
- Chengdu
- China
| | - Xiupeng Li
- National Engineering Research Center for Biomaterials
- Sichuan University
- Chengdu
- China
| | - Yujiang Fan
- National Engineering Research Center for Biomaterials
- Sichuan University
- Chengdu
- China
| | - Xingdong Zhang
- National Engineering Research Center for Biomaterials
- Sichuan University
- Chengdu
- China
| |
Collapse
|
65
|
Emergence of scaffold-free approaches for tissue engineering musculoskeletal cartilages. Ann Biomed Eng 2014; 43:543-54. [PMID: 25331099 DOI: 10.1007/s10439-014-1161-y] [Citation(s) in RCA: 91] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2014] [Accepted: 10/09/2014] [Indexed: 10/24/2022]
Abstract
This review explores scaffold-free methods as an additional paradigm for tissue engineering. Musculoskeletal cartilages-for example articular cartilage, meniscus, temporomandibular joint disc, and intervertebral disc-are characterized by low vascularity and cellularity, and are amenable to scaffold-free tissue engineering approaches. Scaffold-free approaches, particularly the self-assembling process, mimic elements of developmental processes underlying these tissues. Discussed are various scaffold-free approaches for musculoskeletal cartilage tissue engineering, such as cell sheet engineering, aggregation, and the self-assembling process, as well as the availability and variety of cells used. Immunological considerations are of particular importance as engineered tissues are frequently of allogeneic, if not xenogeneic, origin. Factors that enhance the matrix production and mechanical properties of these engineered cartilages are also reviewed, as the fabrication of biomimetically suitable tissues is necessary to replicate function and ensure graft survival in vivo. The concept of combining scaffold-free and scaffold-based tissue engineering methods to address clinical needs is also discussed. Inasmuch as scaffold-based musculoskeletal tissue engineering approaches have been employed as a paradigm to generate engineered cartilages with appropriate functional properties, scaffold-free approaches are emerging as promising elements of a translational pathway not only for musculoskeletal cartilages but for other tissues as well.
Collapse
|
66
|
Bhardwaj N, Devi D, Mandal BB. Tissue-engineered cartilage: the crossroads of biomaterials, cells and stimulating factors. Macromol Biosci 2014; 15:153-82. [PMID: 25283763 DOI: 10.1002/mabi.201400335] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2014] [Revised: 08/25/2014] [Indexed: 02/06/2023]
Abstract
Damage to cartilage represents one of the most challenging tasks of musculoskeletal therapeutics due to its limited propensity for healing and regenerative capabilities. Lack of current treatments to restore cartilage tissue function has prompted research in this rapidly emerging field of tissue regeneration of functional cartilage tissue substitutes. The development of cartilaginous tissue largely depends on the combination of appropriate biomaterials, cell source, and stimulating factors. Over the years, various biomaterials have been utilized for cartilage repair, but outcomes are far from achieving native cartilage architecture and function. This highlights the need for exploration of suitable biomaterials and stimulating factors for cartilage regeneration. With these perspectives, we aim to present an overview of cartilage tissue engineering with recent progress, development, and major steps taken toward the generation of functional cartilage tissue. In this review, we have discussed the advances and problems in tissue engineering of cartilage with strong emphasis on the utilization of natural polymeric biomaterials, various cell sources, and stimulating factors such as biophysical stimuli, mechanical stimuli, dynamic culture, and growth factors used so far in cartilage regeneration. Finally, we have focused on clinical trials, recent innovations, and future prospects related to cartilage engineering.
Collapse
Affiliation(s)
- Nandana Bhardwaj
- Seri-Biotechnology Unit, Life Science Division, Institute of Advanced Study in Science and Technology, Guwahati, 781035, India
| | | | | |
Collapse
|
67
|
Greco KV, Nalesso G, Kaneva MK, Sherwood J, Iqbal AJ, Moradi-Bidhendi N, Dell'Accio F, Perretti M. Analyses on the mechanisms that underlie the chondroprotective properties of calcitonin. Biochem Pharmacol 2014; 91:348-58. [PMID: 25117448 DOI: 10.1016/j.bcp.2014.07.034] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2014] [Revised: 07/30/2014] [Accepted: 07/31/2014] [Indexed: 12/13/2022]
Abstract
INTRODUCTION Calcitonin (CT) has recently been shown to display chondroprotective effects. Here, we investigate the putative mechanisms by which CT delivers these actions. METHODS Immortalized C-28/I2 cells or primary adult human articular chondrocytes (AHAC) were cultured in high-density micromasses to investigate: (i) CT anabolic effects using qPCR and immuhistochemistry analysis; (ii) CT anti-apoptotic effects using quantitation of Bax/Bcl gene products ratio, TUNEL assay and caspase-3 expression; (iii) CT effects on CREB, COL2A1 and NFAT transcription factors. RESULTS CT (10(-10)-10(-8)nM) induced significant up-regulation of cartilage phenotypic markers (SOX9, COL2A1 and ACAN), with down-regulation of catabolic (MMP1 and MMP13 and ADAMTS5) gene products both in resting and inflammatory conditions. This was mirrored by an augmented production of type II collagen and accumulation of glycosaminoglycan- and proteoglycan-rich extracellular matrix in vitro. Mechanistic analyses revealed only partial involvement of cyclic AMP formation in these effects of CT. Congruently, using reporter assays for specific transcription factors, there was no indication for CREB activation, whereas the COL2A1 promoter was genuinely and directly activated by cell exposure to CT. Phenotypically, these mechanisms supported the ability of CT, whilst inactive on its own, to counteract the pro-apoptotic effects of IL-1β, demonstrated by TUNEL-positive staining of chondrocytes and ratio of BAX/BCL genes products. CONCLUSION These data may provide a novel lead for the development of CT-based chondroprotective strategies that rely on the engagement of mechanisms that lead to augmented chondrocyte anabolism and inhibited chondrocyte apoptosis.
Collapse
Affiliation(s)
- Karin V Greco
- The William Harvey Research Institute, Barts and The London School of Medicine, Queen Mary University of London, Charterhouse Square, London EC1M 6BQ, United Kingdom
| | - Giovanna Nalesso
- The William Harvey Research Institute, Barts and The London School of Medicine, Queen Mary University of London, Charterhouse Square, London EC1M 6BQ, United Kingdom
| | - Magdalena K Kaneva
- The William Harvey Research Institute, Barts and The London School of Medicine, Queen Mary University of London, Charterhouse Square, London EC1M 6BQ, United Kingdom
| | - Joanna Sherwood
- The William Harvey Research Institute, Barts and The London School of Medicine, Queen Mary University of London, Charterhouse Square, London EC1M 6BQ, United Kingdom
| | - Asif J Iqbal
- The William Harvey Research Institute, Barts and The London School of Medicine, Queen Mary University of London, Charterhouse Square, London EC1M 6BQ, United Kingdom
| | - Niloufar Moradi-Bidhendi
- The William Harvey Research Institute, Barts and The London School of Medicine, Queen Mary University of London, Charterhouse Square, London EC1M 6BQ, United Kingdom
| | - Francesco Dell'Accio
- The William Harvey Research Institute, Barts and The London School of Medicine, Queen Mary University of London, Charterhouse Square, London EC1M 6BQ, United Kingdom
| | - Mauro Perretti
- The William Harvey Research Institute, Barts and The London School of Medicine, Queen Mary University of London, Charterhouse Square, London EC1M 6BQ, United Kingdom.
| |
Collapse
|
68
|
Tseng A, Pomerantseva I, Cronce MJ, Kimura AM, Neville CM, Randolph MA, Vacanti JP, Sundback CA. Extensively Expanded Auricular Chondrocytes Form Neocartilage In Vivo. Cartilage 2014; 5:241-51. [PMID: 26069703 PMCID: PMC4335768 DOI: 10.1177/1947603514546740] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
OBJECTIVE Our goal was to engineer cartilage in vivo using auricular chondrocytes that underwent clinically relevant expansion and using methodologies that could be easily translated into health care practice. DESIGN Sheep and human chondrocytes were isolated from auricular cartilage biopsies and expanded in vitro. To reverse dedifferentiation, expanded cells were either mixed with cryopreserved P0 chondrocytes at the time of seeding onto porous collagen scaffolds or proliferated with basic fibroblast growth factor (bFGF). After 2-week in vitro incubation, seeded scaffolds were implanted subcutaneously in nude mice for 6 weeks. The neocartilage quality was evaluated histologically; DNA and glycosaminoglycans were quantified. Cell proliferation rates and collagen gene expression profiles were assessed. RESULTS Clinically sufficient over 500-fold chondrocyte expansion was achieved at passage 3 (P3); cell dedifferentiation was confirmed by the simultaneous COL1A1/3A1 gene upregulation and COL2A1 downregulation. The chondrogenic phenotype of sheep but not human P3 cells was rescued by addition of cryopreserved P0 chondrocytes. With bFGF supplementation, chondrocytes achieved clinically sufficient expansion at P2; COL2A1 expression was not rescued but COL1A1/3A1genes were downregulated. Although bFGF failed to rescue COL2A1 expression during chondrocyte expansion in vitro, elastic neocartilage with obvious collagen II expression was observed on porous collagen scaffolds after implantation in mice for 6 weeks. CONCLUSIONS Both animal and human auricular chondrocytes expanded with low-concentration bFGF supplementation formed high-quality elastic neocartilage on porous collagen scaffolds in vivo.
Collapse
Affiliation(s)
- Alan Tseng
- Department of Surgery, Massachusetts General Hospital, Boston, MA, USA,Center for Regenerative Medicine, Boston, MA, USA
| | - Irina Pomerantseva
- Department of Surgery, Massachusetts General Hospital, Boston, MA, USA,Center for Regenerative Medicine, Boston, MA, USA,Harvard Medical School, Boston, MA, USA
| | - Michael J. Cronce
- Department of Surgery, Massachusetts General Hospital, Boston, MA, USA,Center for Regenerative Medicine, Boston, MA, USA
| | - Anya M. Kimura
- Department of Surgery, Massachusetts General Hospital, Boston, MA, USA,Center for Regenerative Medicine, Boston, MA, USA
| | - Craig M. Neville
- Department of Surgery, Massachusetts General Hospital, Boston, MA, USA,Center for Regenerative Medicine, Boston, MA, USA,Harvard Medical School, Boston, MA, USA
| | - Mark A. Randolph
- Harvard Medical School, Boston, MA, USA,Plastic Surgery Research Laboratory, Massachusetts General Hospital, Boston, MA, USA
| | - Joseph P. Vacanti
- Department of Surgery, Massachusetts General Hospital, Boston, MA, USA,Center for Regenerative Medicine, Boston, MA, USA,Harvard Medical School, Boston, MA, USA
| | - Cathryn A. Sundback
- Department of Surgery, Massachusetts General Hospital, Boston, MA, USA,Center for Regenerative Medicine, Boston, MA, USA,Harvard Medical School, Boston, MA, USA
| |
Collapse
|
69
|
Shimomura K, Kanamoto T, Kita K, Akamine Y, Nakamura N, Mae T, Yoshikawa H, Nakata K. Cyclic compressive loading on 3D tissue of human synovial fibroblasts upregulates prostaglandin E2 via COX-2 production without IL-1β and TNF-α. Bone Joint Res 2014; 3:280-8. [PMID: 25237168 PMCID: PMC4178306 DOI: 10.1302/2046-3758.39.2000287] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Objective Excessive mechanical stress on synovial joints causes osteoarthritis
(OA) and results in the production of prostaglandin E2 (PGE2), a
key molecule in arthritis, by synovial fibroblasts. However, the
relationship between arthritis-related molecules and mechanical
stress is still unclear. The purpose of this study was to examine
the synovial fibroblast response to cyclic mechanical stress using
an in vitro osteoarthritis model. Method Human synovial fibroblasts were cultured on collagen scaffolds
to produce three-dimensional constructs. A cyclic compressive loading
of 40 kPa at 0.5 Hz was applied to the constructs, with or without
the administration of a cyclooxygenase-2 (COX-2) selective inhibitor
or dexamethasone, and then the concentrations of PGE2, interleukin-1β (IL-1β),
tumour necrosis factor-α (TNF-α), IL-6, IL-8 and COX-2 were measured. Results The concentrations of PGE2, IL-6 and IL-8 in the loaded samples
were significantly higher than those of unloaded samples; however,
the concentrations of IL-1β and TNF-α were the same as the unloaded
samples. After the administration of a COX-2 selective inhibitor,
the increased concentration of PGE2 by cyclic compressive loading
was impeded, but the concentrations of IL-6 and IL-8 remained high.
With dexamethasone, upregulation of PGE2, IL-6 and IL-8 was suppressed. Conclusion These results could be useful in revealing the molecular mechanism
of mechanical stress in vivo for a better understanding
of the pathology and therapy of OA. Cite this article: Bone Joint Res 2014;3:280–8.
Collapse
Affiliation(s)
- K Shimomura
- Osaka University Graduate School of Medicine, Department of Orthopaedics, 2-2 Yamadaoka, Suita City, Osaka 565-0871, Japan
| | - T Kanamoto
- Osaka University Graduate School of Medicine, Department of Orthopaedics, 2-2 Yamadaoka, Suita City, Osaka 565-0871, Japan
| | - K Kita
- Osaka University Graduate School of Medicine, Department of Orthopaedics, 2-2 Yamadaoka, Suita City, Osaka 565-0871, Japan
| | - Y Akamine
- Osaka University Graduate School of Medicine, Department of Orthopaedics, 2-2 Yamadaoka, Suita City, Osaka 565-0871, Japan
| | - N Nakamura
- Osaka Health Science University, Department of Rehabilitation Science, 1-9-27 Tenma, Kita-ku, Osaka City, Osaka 530-0043, Japan
| | - T Mae
- Osaka University Graduate School of Medicine, Department of Orthopaedics, 2-2 Yamadaoka, Suita City, Osaka 565-0871, Japan
| | - H Yoshikawa
- Osaka University Graduate School of Medicine, Department of Orthopaedics, 2-2 Yamadaoka, Suita City, Osaka 565-0871, Japan
| | - K Nakata
- Osaka University Graduate School of Medicine, Department of Health and Sport Sciences, 1-17 Machikaneyamacho, Toyonaka, Osaka 560-0043, Japan
| |
Collapse
|
70
|
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
| |
Collapse
|
71
|
Omobono MA, Zhao X, Furlong MA, Kwon CH, Gill TJ, Randolph MA, Redmond RW. Enhancing the stiffness of collagen hydrogels for delivery of encapsulated chondrocytes to articular lesions for cartilage regeneration. J Biomed Mater Res A 2014; 103:1332-8. [PMID: 25044419 DOI: 10.1002/jbm.a.35266] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2014] [Revised: 06/02/2014] [Accepted: 06/24/2014] [Indexed: 11/08/2022]
Abstract
This study investigated a dual crosslinking paradigm, consisting of (a) photocrosslinking with Rose Bengal (RB) and green light followed by (b) chemical crosslinking with 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide (EDC), and N-hydroxysuccinimide (NHS) to enhance collagen gel stiffness. In group 1, 50 μL collagen constructs of 2% (w/v) type I collagen containing 10 μM RB were allowed to gel spontaneously at 37 °C. In group 2, the spontaneous gels were exposed to green light (532 nm). In group 3, the photochemically crosslinked gels were subsequently treated with a 1-h exposure to 33 mM EDC/6 mM NHS. Samples (n = 18) were subjected to 0.08% (w/v) collagenase digestion, and the storage modulus of samples was measured by rheometry. Viability of encapsulated chondrocytes was measured by live/dead assay. Chondrocytes were ≥ 95% viable in all constructs at 10 days in vitro. Resistance to collagenase digestion increased as; spontaneous gels (2 h) < photochemical gels (3-4 h) < dual crosslinked gels (>24 h). The storage modulus of dual-crosslinked constructs was increased 5-fold over both photocrosslinked and spontaneous gels. As the dual crosslinking paradigm did not reduce encapsulated chondrocyte viability, these crosslinked collagen hydrogels could be a useful tool for the practical delivery of encapsulated chondrocytes to articular defects.
Collapse
Affiliation(s)
- Mark A Omobono
- Department of Surgery, Plastic Surgery Research Laboratory, Harvard Medical School, Massachusetts General Hospital, Boston, Massachusetts, 02114; Wellman Center for Photomedicine, Harvard Medical School, Massachusetts General Hospital, Boston, Massachusetts, 02114
| | | | | | | | | | | | | |
Collapse
|
72
|
Prittinen J, Jiang Y, Ylärinne JH, Pakkanen TA, Lammi MJ, Qu C. Chondrocyte behavior on nanostructured micropillar polypropylene and polystyrene surfaces. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 43:424-31. [PMID: 25175232 DOI: 10.1016/j.msec.2014.07.045] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 04/17/2014] [Revised: 06/27/2014] [Accepted: 07/13/2014] [Indexed: 01/26/2023]
Abstract
This study was aimed to investigate whether patterned polypropylene (PP) or polystyrene (PS) could enhance the chondrocytes' extracellular matrix (ECM) production and phenotype maintenance. Bovine primary chondrocytes were cultured on smooth PP and PS, as well as on nanostructured micropillar PP (patterned PP) and PS (patterned PS) for 2 weeks. Subsequently, the samples were collected for fluorescein diacetate-based cell viability tests, for immunocytochemical assays of types I and II collagen, actin and vinculin, for scanning electronic microscopic analysis of cell morphology and distribution, and for gene expression assays of Sox9, aggrecan, procollagen α1(II), procollagen α1(X), and procollagen α2(I) using quantitative RT-PCR assays. After two weeks of culture, the bovine primary chondrocytes had attached on both patterned PP and PS, while practically no adhesion was observed on smooth PP. However, the best adhesion of the cells was on smooth PS. The cells, which attached on patterned PP and PS surfaces synthesized types I and II collagen. The chondrocytes' morphology was extended, and an abundant ECM network formed around the attached chondrocytes on both patterned PP and PS. Upon passaging, no significant differences on the chondrocyte-specific gene expression were observed, although the highest expression level of aggrecan was observed on the patterned PS in passage 1 chondrocytes, and the expression level of procollagen α1(II) appeared to decrease in passaged chondrocytes. However, the expressions of procollagen α2(I) were increased in all passaged cell cultures. In conclusion, the bovine primary chondrocytes could be grown on patterned PS and PP surfaces, and they produced extracellular matrix network around the adhered cells. However, neither the patterned PS nor PP could prevent the dedifferentiation of chondrocytes.
Collapse
Affiliation(s)
- Juha Prittinen
- Department of Applied Physics, University of Eastern Finland, Kuopio, Finland
| | - Yu Jiang
- Department of Chemistry, University of Eastern Finland, Joensuu, Finland
| | - Janne H Ylärinne
- Department of Applied Physics, University of Eastern Finland, Kuopio, Finland
| | - Tapani A Pakkanen
- Department of Chemistry, University of Eastern Finland, Joensuu, Finland
| | - Mikko J Lammi
- Department of Applied Physics, University of Eastern Finland, Kuopio, Finland.
| | - Chengjuan Qu
- Department of Applied Physics, University of Eastern Finland, Kuopio, Finland
| |
Collapse
|
73
|
Chen X, Cai C, Liu J, Wen L, Wang X, Ding Y. Impact of estrogen-related receptor α on the biological characteristics of rat mandibular condylar chondrocytes. Mol Med Rep 2014; 10:195-202. [PMID: 24805131 DOI: 10.3892/mmr.2014.2210] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2013] [Accepted: 03/19/2014] [Indexed: 11/06/2022] Open
Abstract
It is well‑known that estrogen-related receptor α (ERRα) affects numerous metabolic pathways and biological functions in the body, although the function of ERRα in the mandibular condylar chondrocytes (MCCs) of the temporomandibular joint remains unclear. The aim of the present study was to investigate the effect of ERRα on the biological characteristics of MCCs in female rats. Immunofluorescent staining was used to observe the expression level and distribution of ERRα in MCCs and tissues. Quantitative polymerase chain reaction (qPCR) was performed to detect the impact of estrogen intervention on the biological characteristics of female rat MCCs and ERRα expression levels. Liposome transfection and XCT‑790 were used to overexpress and inhibit ERRα expression, respectively, and then qPCR was performed to detect changes in the biological characteristics of MCCs. ERRα expression was detected in the nucleus and cytoplasm of rat MCCs. 17‑β estradiol (E2) (10‑8 M) increased the mRNA and protein expression levels of ERRα, Sox9, GDF‑5 and aromatase during in vitro MCC cultivation. In addition, E2 affected MCC proliferation through the regulation of ERRα expression levels. Overexpression of ERRα positively regulated the mRNA and protein expression levels of Sox9 and GDF‑5, but did not exhibit a significant effect on the mRNA and protein expression levels of aromatase and Col2a1. In conclusion, ERRα exhibited an important regulatory role in the proliferation and differentiation of female Sprague‑Dawley rat MCCs in vitro through regulating Sox9 and GDF-5.
Collapse
Affiliation(s)
- Xin Chen
- Department of Orthodontics, School of Stomatology, The Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Chuan Cai
- Institute of Stomatology, Chinese PLA General Hospital, Beijing 100853, P.R. China
| | - Jing Liu
- Department of Orthodontics, School of Stomatology, The Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| | - Li Wen
- Institute of Stomatology, Chinese PLA General Hospital, Beijing 100853, P.R. China
| | - Xi Wang
- Department of Orthodontics, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, P.R. China
| | - Yin Ding
- Department of Orthodontics, School of Stomatology, The Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
| |
Collapse
|
74
|
van den Akker GGH, Surtel DAM, Cremers A, Rodrigues-Pinto R, Richardson SM, Hoyland JA, van Rhijn LW, Welting TJM, Voncken JW. Novel immortal human cell lines reveal subpopulations in the nucleus pulposus. Arthritis Res Ther 2014; 16:R135. [PMID: 24972717 PMCID: PMC4227062 DOI: 10.1186/ar4597] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2013] [Accepted: 06/19/2014] [Indexed: 12/17/2022] Open
Abstract
Introduction Relatively little is known about cellular subpopulations in the mature nucleus pulposus (NP). Detailed understanding of the ontogenetic, cellular and molecular characteristics of functional intervertebral disc (IVD) cell populations is pivotal to the successful development of cell replacement therapies and IVD regeneration. In this study, we aimed to investigate whether phenotypically distinct clonal cell lines representing different subpopulations in the human NP could be generated using immortalization strategies. Methods Nondegenerate healthy disc material (age range, 8 to 15 years) was obtained as surplus surgical material. Early passage NP monolayer cell cultures were initially characterized using a recently established NP marker set. NP cells were immortalized by simian virus 40 large T antigen (SV40LTag) and human telomerase reverse transcriptase expression. Immortalized cells were clonally expanded and characterized based on collagen type I, collagen type II, α1 (COL2A1), and SRY-box 9 (SOX9) protein expression profiles, as well as on expression of a subset of established in vivo NP cell lineage markers. Results A total of 54 immortal clones were generated. Profiling of a set of novel NP markers (CD24, CA12, PAX1, PTN, FOXF1 and KRT19 mRNA) in a representative set of subclones substantiated successful immortalization of multiple cellular subpopulations from primary isolates and confirmed their NP origin and/or phenotype. We were able to identify two predominant clonal NP subtypes based on their morphological characteristics and their ability to induce SOX9 and COL2A1 under conventional differentiation conditions. In addition, cluster of differentiation 24 (CD24)–negative NP responder clones formed spheroid structures in various culture systems, suggesting the preservation of a more immature phenotype compared to CD24-positive nonresponder clones. Conclusions Here we report the generation of clonal NP cell lines from nondegenerate human IVD tissue and present a detailed characterization of NP cellular subpopulations. Differential cell surface marker expression and divergent responses to differentiation conditions suggest that the NP subtypes may correspond to distinct maturation stages and represent distinct NP cell subpopulations. Hence, we provide evidence that the immortalization strategy that we applied is capable of detecting cell heterogeneity in the NP. Our cell lines yield novel insights into NP biology and provide promising new tools for studies of IVD development, cell function and disease.
Collapse
|
75
|
Comparative study of collagen hydrogels modified in two ways using the model of ectopic cartilage construction with diffusion-chamber in immunocompetent host. J Appl Biomater Funct Mater 2014; 12:41-7. [PMID: 22865571 DOI: 10.5301/jabfm.2012.9340] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/20/2012] [Indexed: 11/20/2022] Open
Abstract
PURPOSE For scaffolds in cartilage tissue engineering, it is the principle to design the materials with both favorable mechanical and biological property. METHODS In this article, collagen hydrogels modified by two ways to improve mechanical strength were applied for in vivo cartilage reconstruction: one is collagen-alginate hydrogel (CAH) representative of mixture, the other is collagen hydrogel crosslinked by genipin (CGH). To investigate the biological activities of the two materials, it was designed as: scaffolds loaded with allogenous chondrocytes were encased in diffusion chamber, and then implanted subcutaneously in SD rats for 8 weeks. RESULTS Histologic, immunohistochemical, and RT-PCR results showed that collagen type Ⅱ and GAG, indicator of cartilage extracellular matrix (ECM) was highly expressed in constructs of chondrocyte-CAH. Significantly lower cell density and expression of cartilage specific protein were shown in constructs of chondrocyte-CGH than that in chondrocyte-CAH. This demonstrated that CAH may provide a more favorable environment for cartilage reconstruction. In addition, the model with diffusion chamber technique was viable for evaluation of scaffolds in vivo cartilage engineering in immunocompetent host. Instead, directly reconstruction of ectopic cartilage without diffusion chamber suffered from damaged tissue and less neo-cartilage matrix formed. CONCLUSIONS In conclusion, CAH is realistic as scaffold for in vivo cartilage tissue engineering with both satisfactory mechanical properties and biomimetic activity. And the model with diffusion chamber to reconstruct ectopic cartilage in immunocompetent animals is promising for evaluation of scaffolds. This study provided a new insight for in vivo cartilage tissue engineering.
Collapse
|
76
|
Expression profiling and functional implications of a set of zinc finger proteins, ZNF423, ZNF470, ZNF521, and ZNF780B, in primary osteoarthritic articular chondrocytes. Mediators Inflamm 2014; 2014:318793. [PMID: 24976683 PMCID: PMC4058293 DOI: 10.1155/2014/318793] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2014] [Revised: 04/23/2014] [Accepted: 04/23/2014] [Indexed: 01/27/2023] Open
Abstract
Articular chondrocytes are responsible for the maintenance of healthy articulations; indeed, dysregulation of their functions, including the production of matrix proteins and matrix-remodeling proteases, may result in fraying of the tissue and development of osteoarthritis (OA). To explore transcriptional mechanisms that contribute to the regulation of chondrocyte homeostasis and may be implicated in OA development, we compared the gene expression profile of a set of zinc finger proteins potentially linked to the control of chondrocyte differentiation and/or functions (ZNF423, ZNF470, ZNF521, and ZNF780B) in chondrocytes from patients affected by OA and from subjects not affected by OA. This analysis highlighted a significantly lower expression of the transcript encoding ZNF423 in chondrocytes from OA, particularly in elderly patients. Interestingly, this decrease was mirrored by the similarly reduced expression of PPARγ, a known target of ZNF423 with anti-inflammatory and chondroprotective properties. The ZNF521 mRNA instead was abundant in all primary chondrocytes studied; the RNAi-mediated silencing of this gene significantly altered the COL2A/COL1 expression ratio, associated with the maintenance of the differentiated phenotype, in chondrocytes cultivated in alginate beads. These results suggest a role for ZNF423 and ZNF521 in the regulation of chondrocyte homeostasis and warrant further investigations to elucidate their mechanism of action.
Collapse
|
77
|
Kim HM, Park JY, Kim EY, Song JE, Kwon SY, Chung JW, Khang G. Tissue Engineered Catilage Reconstruction with Alginate Sponge Containing Demineralized Bone Particles. POLYMER-KOREA 2014. [DOI: 10.7317/pk.2014.38.3.278] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
|
78
|
Gago-Fuentes R, Carpintero-Fernandez P, Goldring MB, Brink PR, Mayan MD, Blanco FJ. Biochemical evidence for gap junctions and Cx43 expression in immortalized human chondrocyte cell line: a potential model in the study of cell communication in human chondrocytes. Osteoarthritis Cartilage 2014; 22:586-90. [PMID: 24530659 DOI: 10.1016/j.joca.2014.02.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/27/2013] [Revised: 02/01/2014] [Accepted: 02/06/2014] [Indexed: 02/02/2023]
Abstract
OBJECTIVE The development of chondrocytic cell lines has enabled the investigation of the role of cellular phenotype and mechanisms in articular cartilage biology and physiopathology of several rheumatic diseases. Among them, the T/C-28a2 cell line has become a common tool in cartilage research. Recent results from our group have revealed that primary human chondrocytes in tissue and in monolayer culture contain high levels of connexin 43 (Cx43) and are able to directly communicate through gap junction (GJ) channels. These results challenge the existing thesis of cartilage physiology, that chondrocytes do not have the capacity to physically communicate with each other. Established cell lines offer the advantage of convenience and uniformity; however, the establishment process may cause a disruption of GJ. This study was performed to investigate if T/C-28a2 cells contain Cx43 protein and form functional channels. METHODS Cx43 was characterized by RT-qPCR, Western blotting, and immunohistochemistry (IHC). Electrophysiology experiments, Lucifer Yellow (LY) uptake, electroporation in situ and scrape loading assay were performed to test the functionality of GJs. RESULTS T/C-28a2 cells express Cx43. Electrophysiology experiments and LY uptake confirmed the capacity of these cells to communicate through GJ channels, although these cells contain significant levels of active c-Src kinase, presumably due to their immortalization with the Simian Virus 40 large T antigen. The results were validated using primary chondrocytes (PC). CONCLUSIONS These results reveal that the T/C-28a2 line may provide a useful in vitro model for the study of Cx43 function and cell communication to understand the physiology of chondrocytes and cartilage.
Collapse
Affiliation(s)
- R Gago-Fuentes
- Cartilage Biology Research Group, Rheumatology Division, INIBIC-Hospital Universitario A Coruña, Xubias de Arriba 84, 15006 A Coruña, Spain
| | - P Carpintero-Fernandez
- Cartilage Biology Research Group, Rheumatology Division, INIBIC-Hospital Universitario A Coruña, Xubias de Arriba 84, 15006 A Coruña, Spain
| | - M B Goldring
- Tissue Engineering Repair and Regeneration Program, The Hospital for Special Surgery, Weill Cornell Medical College, New York, NY, USA
| | - P R Brink
- Department of Physiology and Biophysics, State University of New York, Stony Brook, NY, USA
| | - M D Mayan
- Cartilage Biology Research Group, Rheumatology Division, INIBIC-Hospital Universitario A Coruña, Xubias de Arriba 84, 15006 A Coruña, Spain.
| | - F J Blanco
- Cartilage Biology Research Group, Rheumatology Division, INIBIC-Hospital Universitario A Coruña, Xubias de Arriba 84, 15006 A Coruña, Spain; Rheumatology Division, ProteoRed/ISCIII, Proteomics Group, INIBIC-Hospital Universitario A Coruña, Xubias de Arriba 84, 15006 A Coruña, Spain; Rheumatology Division, CIBER-BBN/ISCIII, INIBIC-Hospital Universitario A Coruña, Xubias de Arriba 84, 15006 A Coruña, Spain.
| |
Collapse
|
79
|
Schlichting N, Dehne T, Mans K, Endres M, Stuhlmüller B, Sittinger M, Kaps C, Ringe J. Suitability of porcine chondrocyte micromass culture to model osteoarthritis in vitro. Mol Pharm 2014; 11:2092-105. [PMID: 24635637 DOI: 10.1021/mp5000554] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
In vitro tissue models are useful tools for the development of novel therapy strategies in cartilage repair and care. The limited availability of human primary tissue and high costs of animal models hamper preclinical tests of innovative substances and techniques. In this study we tested the potential of porcine chondrocyte micromass cultures to mimic human articular cartilage and essential aspects of osteoarthritis (OA) in vitro. Primary chondrocytes were enzymatically isolated from porcine femoral condyles and were maintained in 96-multiwell format to establish micromass cultures in a high-throughput scale. Recombinant porcine tumor necrosis factor alpha (TNF-α) was used to induce OA-like changes documented on histological (Safranin O, collagen type II staining), biochemical (hydroxyproline assay, dimethylmethylene blue method), and gene expression level (Affymetrix porcine microarray, real time PCR) and were compared with published data from human articular cartilage and human micromass cultures. After 14 days in micromass culture, porcine primary chondrocytes produced ECM rich in proteoglycans and collagens. On gene expression level, significant correlations of detected genes with porcine cartilage (r = 0.90), human cartilage (r = 0.71), and human micromass culture (r = 0.75) were observed including 34 cartilage markers such as COL2A1, COMP, and aggrecan. TNF-α stimulation led to significant proteoglycan (-75%) and collagen depletion (-50%). Comparative expression pattern analysis revealed the involvement of catabolic enzymes (MMP1, -2, -13, ADAM10), chemokines (IL8, CCL2, CXCL2, CXCL12, CCXL14), and genes associated with cell death (TNFSF10, PMAIPI, AHR) and skeletal development (GPNMB, FRZB) including transcription factors (WIF1, DLX5, TWIST1) and growth factors (IGFBP1, -3, TGFB1) consistent with published data from human OA cartilage. Expression of genes related to cartilage ECM formation (COL2A1, COL9A1, COMP, aggrecan) as well as hypertrophic bone formation (COL1A1, COL10A1) was predominantly found decreased. These findings indicating significant parallels between human articular cartilage and the presented porcine micromass model and vice versa confirm the applicability of known cartilage marker and their characteristics in the porcine micromass model. TNF-α treatment enabled the initiation of typical OA reaction patterns in terms of extensive ECM loss, cell death, formation of an inflammatory environment through the induction of genes coding for chemokines and enzymes, and the modulation of genes involved in skeletal development such as growth factors, transcription factors, and cartilage ECM-forming genes. In conclusion, the porcine micromass model represents an alternative tissue platform for the evaluation of innovative substances and techniques for the treatment of OA.
Collapse
Affiliation(s)
- Niels Schlichting
- Tissue Engineering Laboratory & Berlin-Brandenburg Center for Regenerative Therapies (BCRT), Department of Rheumatology and Clinical Immunology, Charité-Universitätsmedizin Berlin , 10117 Berlin, Germany
| | | | | | | | | | | | | | | |
Collapse
|
80
|
Sridhar BV, Doyle NR, Randolph MA, Anseth KS. Covalently tethered TGF-β1 with encapsulated chondrocytes in a PEG hydrogel system enhances extracellular matrix production. J Biomed Mater Res A 2014; 102:4464-72. [PMID: 24616326 DOI: 10.1002/jbm.a.35115] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2013] [Revised: 01/24/2014] [Accepted: 02/10/2014] [Indexed: 11/09/2022]
Abstract
Healing articular cartilage defects remains a significant clinical challenge because of its limited capacity for self-repair. While delivery of autologous chondrocytes to cartilage defects has received growing interest, combining cell-based therapies with growth factor delivery that can locally signal cells and promote their function is often advantageous. We have previously shown that PEG thiol-ene hydrogels permit covalent attachment of growth factors. However, it is not well known if embedded chondrocytes respond to tethered signals over a long period. Here, chondrocytes were encapsulated in PEG hydrogels functionalized with transforming growth factor-beta 1 (TGF-β1) with the goal of increasing proliferation and matrix production. Tethered TGF-β1 was found to be distributed homogenously throughout the gel, and its bioactivity was confirmed with a TGF-β1 responsive reporter cell line. Relative to solubly delivered TGF-β1, chondrocytes presented with immobilized TGF-β1 showed significantly increased DNA content, and GAG and collagen production over 28 days, while maintaining markers of articular cartilage. These results indicate the potential of thiol-ene chemistry to covalently conjugate TGF-β1 to PEG to locally influence chondrocyte function over 4 weeks. Scaffolds with other or multiple tethered growth factors may prove broadly useful in the design of chondrocyte delivery vehicles for cartilage tissue engineering applications.
Collapse
Affiliation(s)
- Balaji V Sridhar
- Department of Chemical and Biological Engineering, University of Colorado at Boulder, Boulder, Colorado; Biofrontiers Institute, University of Colorado at Boulder, Boulder, Colorado
| | | | | | | |
Collapse
|
81
|
Liu H, Zhao Z, Clarke RB, Gao J, Garrett IR, Margerrison EEC. Enhanced tissue regeneration potential of juvenile articular cartilage. Am J Sports Med 2013; 41:2658-67. [PMID: 24043472 DOI: 10.1177/0363546513502945] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
BACKGROUND Articular cartilage undergoes substantial age-related changes in molecular composition, matrix structure, and mechanical properties. These age-related differences between juvenile and adult cartilage manifest themselves as markedly distinct potentials for tissue repair and regeneration. PURPOSE To compare the biological properties and tissue regeneration capabilities of juvenile and adult bovine articular cartilage. STUDY DESIGN Controlled laboratory study. METHODS Articular cartilage harvested from juvenile (age, 4 months) and adult (age, 6-8 years) bovine femoral condyles was cultured for 4 weeks to monitor chondrocyte migration, glycosaminoglycan content conservation, and new tissue formation. The cartilage cell density and proliferative activity were also compared. Additionally, the effects of age-related changes on cartilage gene expression were analyzed using the Affymetrix GeneChip array. RESULTS Compared with adult cartilage, juvenile bovine cartilage demonstrated a significantly greater cell density, higher cell proliferation rate, increased cell outgrowth, elevated glycosaminoglycan content, and enhanced matrix metallopeptidase 2 activity. During 4 weeks in culture, only juvenile cartilage was able to generate new cartilaginous tissues, which exhibited pronounced labeling for proteoglycan and type II collagen but not type I collagen. With over 19,000 genes analyzed, distinctive gene expression profiles were identified. The genes mostly involved in cartilage growth and expansion, such as COL2A1, COL9A1, MMP2, MMP14, and TGFB3, were upregulated in juvenile cartilage, whereas the genes primarily responsible for structural integrity, such as COMP, FN1, TIMP2, TIMP3, and BMP2, were upregulated in adult cartilage. CONCLUSION As the first comprehensive comparison between juvenile and adult bovine articular cartilage at the tissue, cellular, and molecular levels, the results strongly suggest that juvenile cartilage possesses superior chondrogenic activity and enhanced regenerative potential over its adult counterpart. Additionally, the differential gene expression profiles of juvenile and adult cartilage suggest possible mechanisms underlying cartilage age-related changes in their regeneration capabilities, structural components, and biological properties. CLINICAL RELEVANCE The results of this comparative study between juvenile and adult bovine articular cartilage suggest an enhanced regenerative potential of juvenile cartilage tissue in the restoration of damaged articular cartilage.
Collapse
Affiliation(s)
- Hui Liu
- Rhonda B. Clarke, MS, Zimmer Orthobiologics Inc, 9301 Amberglen Boulevard, Building J, Suite 100, Austin, TX 78729.
| | | | | | | | | | | |
Collapse
|
82
|
Zhang K, Wang L, Han Q, Heng BC, Yang Z, Ge Z. RELATIONSHIP BETWEEN CELL FUNCTION AND INITIAL CELL SEEDING DENSITY OF PRIMARY PORCINE CHONDROCYTES IN VITRO. BIOMEDICAL ENGINEERING-APPLICATIONS BASIS COMMUNICATIONS 2013. [DOI: 10.4015/s1016237213400012] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Maintenance of differentiated functional phenotype within in vitro chondrocyte culture requires seeding at high densities with large numbers of cells. However, optimal cell seeding numbers and densities remain elusive due to multiple varying parameters and different methodologies utilized in previous studies. In the current study, we tried to investigate the relationship between cell seeding number and differentiated functional phenotype of in vitro cultured chondrocytes. Varying numbers of primary porcine chondrocytes (0.25, 2.5, 25 and 250 K) were seeded in 96 well-plates and cultured for 4 weeks. Cell proliferation, glycosaminoglycan (GAG) production and gene expression levels of Sox9, aggrecan, COL II and COL I were evaluated. The results showed that GAG content was high in the 0.25 and 25 K groups, gene expression of Sox9 was high in the 2.5, 25 and 250 K groups and expression of COL II was high in the 25 K group, whereas expression of COL I was low in the 0.25, 25 and 250 K groups. It is concluded that the seeding number and density of the 25 K (78 K cells/cm2) group achieved the optimal balance between functional phenotype of individual cells and the total ECM production for in vitro cultured chondrocytes.
Collapse
Affiliation(s)
- Kun Zhang
- Department of Biomedical Engineering, College of Engineering, Peking University, Beijing 100871, China
| | - Lili Wang
- Department of Biomedical Engineering, College of Engineering, Peking University, Beijing 100871, China
| | - Qianqian Han
- Department of Biomedical Engineering, College of Engineering, Peking University, Beijing 100871, China
| | - Boon Chin Heng
- Department of Biosystems Science & Engineering (D-BSSE), ETH-Zurich, Mattenstrasse 26, Basel 4058, Switzerland
| | - Zheng Yang
- NUS Tissue Engineering Program, National University of Singapore, 27 Medical Drive, Singapore 117510, Singapore
| | - Zigang Ge
- Department of Biomedical Engineering, College of Engineering, Peking University, Beijing 100871, China
- NUS Tissue Engineering Program, National University of Singapore, 27 Medical Drive, Singapore 117510, Singapore
- Center for Biomedical Materials and Tissue Engineering, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, China
| |
Collapse
|
83
|
Gutiérrez ML, Guevara JM, Echeverri OY, Garzón-Alvarado D, Barrera LA. Aggrecan catabolism during mesenchymal stromal cellin vitrochondrogenesis. Anim Cells Syst (Seoul) 2013. [DOI: 10.1080/19768354.2013.812537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
|
84
|
Cheung CS, Lui JC, Baron J. Identification of chondrocyte-binding peptides by phage display. J Orthop Res 2013; 31:1053-8. [PMID: 23440926 PMCID: PMC4803314 DOI: 10.1002/jor.22325] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/23/2012] [Accepted: 01/23/2013] [Indexed: 02/04/2023]
Abstract
As an initial step toward targeting cartilage tissue for potential therapeutic applications, we sought cartilage-binding peptides using phage display, a powerful technology for selection of peptides that bind to molecules of interest. A library of phage displaying random 12-amino acid peptides was iteratively incubated with cultured chondrocytes to select phage that bind cartilage. The resulting phage clones demonstrated increased affinity to chondrocytes by ELISA, when compared to a wild-type, insertless phage. Furthermore, the selected phage showed little preferential binding to other cell types, including primary skin fibroblast, myocyte and hepatocyte cultures, suggesting a tissue-specific interaction. Immunohistochemical staining revealed that the selected phage bound chondrocytes themselves and the surrounding extracellular matrix. FITC-tagged peptides were synthesized based on the sequence of cartilage-binding phage clones. These peptides, but not a random peptide, bound cultured chondrocytes, and extracelluar matrix. In conclusion, using phage display, we identified peptide sequences that specifically target chondrocytes. We anticipate that such peptides may be coupled to therapeutic molecules to provide targeted treatment for cartilage disorders.
Collapse
Affiliation(s)
- Crystal S.F. Cheung
- Developmental Endocrinology Branch, Program in Developmental Endocrinology and Genetics; Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda; Maryland
| | - Julian C. Lui
- Developmental Endocrinology Branch, Program in Developmental Endocrinology and Genetics; Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda; Maryland
| | - Jeffrey Baron
- Developmental Endocrinology Branch, Program in Developmental Endocrinology and Genetics; Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda; Maryland
| |
Collapse
|
85
|
Ye K, Felimban R, Moulton SE, Wallace GG, Bella CD, Traianedes K, Choong PFM, Myers DE. Bioengineering of articular cartilage: past, present and future. Regen Med 2013; 8:333-49. [DOI: 10.2217/rme.13.28] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
The treatment of cartilage defects poses a clinical challenge owing to the lack of intrinsic regenerative capacity of cartilage. The use of tissue engineering techniques to bioengineer articular cartilage is promising and may hold the key to the successful regeneration of cartilage tissue. Natural and synthetic biomaterials have been used to recreate the microarchitecture of articular cartilage through multilayered biomimetic scaffolds. Acellular scaffolds preserve the microarchitecture of articular cartilage through a process of decellularization of biological tissue. Although promising, this technique often results in poor biomechanical strength of the graft. However, biomechanical strength could be improved if biomaterials could be incorporated back into the decellularized tissue to overcome this limitation.
Collapse
Affiliation(s)
- Ken Ye
- Department of Orthopaedics, St Vincent’s Hospital, Fitzroy, Victoria 3065, Australia
- Department of Surgery, St Vincent’s Hospital, University of Melbourne, Fitzroy, Victoria 3065, Australia.
| | - Raed Felimban
- Department of Surgery, St Vincent’s Hospital, University of Melbourne, Fitzroy, Victoria 3065, Australia
- Department of Orthopaedics, St Vincent’s Hospital, Fitzroy, Victoria 3065, Australia
| | - Simon E Moulton
- Intelligent Polymer Research Institute, University of Wollongong, ARC Centre of Excellence for Electromaterials Science (ACES), Squires Way, North Wollongong, New South Wales 2552, Australia
| | - Gordon G Wallace
- Intelligent Polymer Research Institute, University of Wollongong, ARC Centre of Excellence for Electromaterials Science (ACES), Squires Way, North Wollongong, New South Wales 2552, Australia
| | - Claudia Di Bella
- Department of Surgery, St Vincent’s Hospital, University of Melbourne, Fitzroy, Victoria 3065, Australia
- Department of Orthopaedics, St Vincent’s Hospital, Fitzroy, Victoria 3065, Australia
| | - Kathy Traianedes
- Department of Surgery, St Vincent’s Hospital, University of Melbourne, Fitzroy, Victoria 3065, Australia
| | - Peter FM Choong
- Department of Surgery, St Vincent’s Hospital, University of Melbourne, Fitzroy, Victoria 3065, Australia
- Department of Orthopaedics, St Vincent’s Hospital, Fitzroy, Victoria 3065, Australia
| | - Damian E Myers
- Department of Surgery, St Vincent’s Hospital, University of Melbourne, Fitzroy, Victoria 3065, Australia
- Department of Orthopaedics, St Vincent’s Hospital, Fitzroy, Victoria 3065, Australia
| |
Collapse
|
86
|
Characterization of articular chondrocytes isolated from 211 osteoarthritic patients. Cell Tissue Bank 2013; 15:59-66. [DOI: 10.1007/s10561-013-9371-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2012] [Accepted: 03/22/2013] [Indexed: 10/27/2022]
|
87
|
Maerz T, Herkowitz H, Baker K. Molecular and genetic advances in the regeneration of the intervertebral disc. Surg Neurol Int 2013; 4:S94-S105. [PMID: 23646279 PMCID: PMC3642750 DOI: 10.4103/2152-7806.109449] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2012] [Accepted: 01/30/2013] [Indexed: 02/06/2023] Open
Abstract
Background: Owing to the debilitating nature of degenerative disc disease (DDD) and other spine pathologies, significant research has been performed with the goal of healing or regenerating the intervertebral disc (IVD). Structural complexity, coupled with low vascularity and cellularity, make IVD regeneration an extremely challenging task. Methods: Tissue engineering-based strategies utilize three components to enhance tissue regeneration; scaffold materials to guide cell growth, biomolecules to enhance cell migration and differentiation, and cells (autologous, or allogeneic) to initiate the process of tissue formation. Significant advances in IVD regeneration have been made utilizing these tissue engineering strategies. Results: The current literature demonstrates that members of the transforming growth factor beta (TGF-β) superfamily are efficacious in the regeneration of an anabolic response in the IVD and to facilitate chondrogenic differentiation. Gene therapy, though thwarted by safety concerns and the risk of ectopic transfection, has significant potential for a targeted and sustained regenerative response. Stem cells in combination with injectable, biocompatible, and biodegradable scaffolds in the form of hydrogels can differentiate into de novo IVD tissue and facilitate regeneration of the existing matrix. Therapies that address both anabolism and the inherent catabolic state of the IVD using either direct inhibitors or broad-spectrum inhibitors show extensive promise. Conclusion: This review article summarizes the genetic and molecular advances that promise to play an integral role in the development of new strategies to combat DDD and promote healing of injured discs.
Collapse
Affiliation(s)
- Tristan Maerz
- Department of Orthopaedic Research, Beaumont Health System, Royal Oak, MI, USA
| | | | | |
Collapse
|
88
|
Popa EG, Caridade SG, Mano JF, Reis RL, Gomes ME. Chondrogenic potential of injectable κ-carrageenan hydrogel with encapsulated adipose stem cells for cartilage tissue-engineering applications. J Tissue Eng Regen Med 2013; 9:550-63. [PMID: 23303734 DOI: 10.1002/term.1683] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2012] [Accepted: 11/14/2012] [Indexed: 11/11/2022]
Abstract
Due to the limited self-repair capacity of cartilage, regenerative medicine therapies for the treatment of cartilage defects must use a significant amount of cells, preferably applied using a hydrogel system that can promise their delivery and functionality at the specific site. This paper discusses the potential use of κ-carrageenan hydrogels for the delivery of stem cells obtained from adipose tissue in the treatment of cartilage tissue defects. The developed hydrogels were produced by an ionotropic gelation method and human adipose stem cells (hASCs) were encapsulated in 1.5% w/v κ-carrageenan solution at a cell density of 5 × 10(6) cells/ml. The results from the analysis of the cell-encapsulating hydrogels, cultured for up to 21 days, indicated that κ-carrageenan hydrogels support the viability, proliferation and chondrogenic differentiation of hASCs. Additionally, the mechanical analysis demonstrated an increase in stiffness and viscoelastic properties of κ-carrageenan gels with their encapsulated cells with increasing time in culture with chondrogenic medium. These results allowed the conclusion that κ-carrageenan exhibits properties that enable the in vitro functionality of encapsulated hASCs and thus may provide the basis for new successful approaches for the treatment of cartilage defects.
Collapse
Affiliation(s)
- Elena G Popa
- 3Bs Research Group - Biomaterials, Biodegradables and Biomimetics, University of Minho, Guimarães, Portugal; ICVS/3Bs - PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | | | | | | | | |
Collapse
|
89
|
Yang W, Yang F, Wang Y, Both SK, Jansen JA. In vivo bone generation via the endochondral pathway on three-dimensional electrospun fibers. Acta Biomater 2013; 9:4505-12. [PMID: 23059416 DOI: 10.1016/j.actbio.2012.10.003] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2012] [Revised: 09/28/2012] [Accepted: 10/02/2012] [Indexed: 01/18/2023]
Abstract
A new concept of generating bone tissue via the endochondral route might be superior to the standard intramembranous ossification approach. To implement the endochondral approach, suitable scaffolds are required to provide a three-dimensional (3-D) substrate for cell population and differentiation, and eventually for the generation of osteochondral tissue. Therefore, a novel wet-electrospinning system, using ethanol as the collecting medium, was exploited in this study to fabricate a cotton-like poly(lactic-co-glycolic acid)/poly(ε-caprolactone) scaffold that consisted of a very loose and uncompressed accumulation of fibers. Rat bone marrow cells were seeded on these scaffolds and chondrogenically differentiated in vitro for 4 weeks followed by subcutaneous implantation in vivo for 8 weeks. Cell pellets were used as a control. A glycosaminoglycan assay and Safranin O staining showed that the cells infiltrated throughout the scaffolds and deposited an abundant cartilage matrix after in vitro chondrogenic priming. Histological analysis of the in vivo samples revealed extensive new bone formation through the remodeling of the cartilage template. In conclusion, using the wet-electrospinning method, we are able to create a 3-D scaffold in which bone tissue can be formed via the endochondral pathway. This system can be easily processed for various assays and histological analysis. Consequently, it is more efficient than the traditional cell pellets as a tool to study endochondral bone formation for tissue engineering purposes.
Collapse
|
90
|
Schwarz S, Elsaesser AF, Koerber L, Goldberg-Bockhorn E, Seitz AM, Bermueller C, Dürselen L, Ignatius A, Breiter R, Rotter N. Processed xenogenic cartilage as innovative biomatrix for cartilage tissue engineering: effects on chondrocyte differentiation and function. J Tissue Eng Regen Med 2012. [PMID: 23193064 DOI: 10.1002/term.1650] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
One key point in the development of new bioimplant matrices for the reconstruction and replacement of cartilage defects is to provide an adequate microenvironment to ensure chondrocyte migration and de novo synthesis of cartilage-specific extracellular matrix (ECM). A recently developed decellularization and sterilization process maintains the three-dimensional (3D) collagen structure of native septal cartilage while increasing matrix porosity, which is considered to be crucial for cartilage tissue engineering. Human primary nasal septal chondrocytes were amplified in monolayer culture and 3D-cultured on processed porcine nasal septal cartilage scaffolds. The influence of chondrogenic growth factors on neosynthesis of ECM proteins was examined at the protein and gene expression levels. Seeding experiments demonstrated that processed xenogenic cartilage matrices provide excellent environmental properties for human nasal septal chondrocytes with respect to cell adhesion, migration into the matrix and neosynthesis of cartilage-specific ECM proteins, such as collagen type II and aggrecan. Matrix biomechanical stability indicated that the constructs retrieve full stability and function during 3D culture for up to 42 days, proportional to collagen type II and GAG production. Thus, processed xenogenic cartilage offers a suitable environment for human nasal chondrocytes and has promising potential for cartilage tissue engineering in the head and neck region.
Collapse
Affiliation(s)
- Silke Schwarz
- Department of Otorhinolaryngology, Ulm University Medical Centre, Germany.
| | | | - Ludwig Koerber
- Institute of Bioprocess Engineering, University of Erlangen, Germany
| | | | - Andreas M Seitz
- Institute of Orthopaedic Research and Biomechanics, Centre of Musculoskeletal Research Ulm, University of Ulm, Germany
| | | | - Lutz Dürselen
- Institute of Orthopaedic Research and Biomechanics, Centre of Musculoskeletal Research Ulm, University of Ulm, Germany
| | - Anita Ignatius
- Institute of Orthopaedic Research and Biomechanics, Centre of Musculoskeletal Research Ulm, University of Ulm, Germany
| | - Roman Breiter
- Institute of Bioprocess Engineering, University of Erlangen, Germany
| | - Nicole Rotter
- Department of Otorhinolaryngology, Ulm University Medical Centre, Germany
| |
Collapse
|
91
|
|
92
|
Caron MMJ, Emans PJ, Coolsen MME, Voss L, Surtel DAM, Cremers A, van Rhijn LW, Welting TJM. Redifferentiation of dedifferentiated human articular chondrocytes: comparison of 2D and 3D cultures. Osteoarthritis Cartilage 2012; 20:1170-8. [PMID: 22796508 DOI: 10.1016/j.joca.2012.06.016] [Citation(s) in RCA: 325] [Impact Index Per Article: 27.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/02/2012] [Revised: 06/07/2012] [Accepted: 06/30/2012] [Indexed: 02/02/2023]
Abstract
OBJECTIVE Three-dimensional (3D) cultures are widely used to redifferentiate chondrocytes. However, the rationale behind the choice for 3D above two-dimensional (2D) cultures is poorly systematically investigated and mainly based on mRNA expression and glycosaminoglycan (GAG) content. The objective was to determine the differential redifferentiation characteristics of human articular chondrocytes (HACs) in monolayer, alginate beads and pellet culture by investigating mRNA expression, protein expression, GAG content and cell proliferation. DESIGN Dedifferentiated HACs from six individuals were redifferentiated in identical medium conditions for 7 days in monolayer, alginate beads or pellet culture. Read-out parameters were expression of chondrogenic and hypertrophic mRNAs and proteins, GAG content and cell proliferation. RESULTS 3D cultures specifically expressed chondrogenic mRNAs [collagen type II (COL2A1), SRY (sex determining region Y)-box 9 (SOX9), aggrecan (ACAN)), whereas 2D cultures did not. Hypertrophic mRNAs (collagen type X (COL10A1), runt-related transcription factor 2 (RUNX2), matrix metalloproteinase 13 (MMP13), vascular endothelial growth factor A (VEGFA), osteopontin (OPN), alkaline phosphatase (ALP)) were highly increased in 2D cultures and lower in 3D cultures. Collagen type I (COL1A1) mRNA expression was highest in 3D cultures. Protein expression supports most of the mRNA data, although an important discrepancy was found between mRNA and protein expression of COL2A1 and SOX9 in monolayer culture, stressing on the importance of protein expression analysis. GAG content was highest in 3D cultures, whereas chondrocyte proliferation was almost specific for 2D cultures. CONCLUSIONS For redifferentiation of dedifferentiated HACs, 3D cultures exhibit the most potent chondrogenic potential, whereas a hypertrophic phenotype is best achieved in 2D cultures. This is the first human study that systematically evaluates the differences between proliferation, GAG content, protein expression and mRNA expression of commonly used 2D and 3D chondrocyte culture techniques.
Collapse
Affiliation(s)
- M M J Caron
- Department of Orthopaedic Surgery, CAPHRI School for Public Health and Primary Care, Maastricht University Medical Center, P.O. Box 5800, 6202 AZ Maastricht, The Netherlands.
| | | | | | | | | | | | | | | |
Collapse
|
93
|
Therapie chondraler und osteochondraler Defekte am Talus durch Autologe Matrix Induzierte Chondrogenese. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.fuspru.2012.03.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
94
|
Assessment of cartilage repair after chondrocyte transplantation with a fibrin-hyaluronan matrix – Correlation of morphological MRI, biochemical T2 mapping and clinical outcome. Eur J Radiol 2012; 81:1216-23. [DOI: 10.1016/j.ejrad.2011.03.031] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2011] [Accepted: 03/07/2011] [Indexed: 11/19/2022]
|
95
|
Liu J, Liu X, Zhou G, Xiao R, Cao Y. Conditioned medium from chondrocyte/scaffold constructs induced chondrogenic differentiation of bone marrow stromal cells. Anat Rec (Hoboken) 2012; 295:1109-16. [PMID: 22644958 DOI: 10.1002/ar.22500] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2011] [Accepted: 04/17/2012] [Indexed: 01/07/2023]
Abstract
For the application of bone marrow stromal cells (BMSCs) in cartilage tissue engineering, it is imperative to develop efficient strategies for their chondrogenic differentiation. In this study, the conditioned media derived from chondrocyte/scaffold constructs were used to direct chondrogenic differentiation of BMSCs. The porcine articular chondrocytes were seeded on the PGA/PLA scaffolds to form chondrocyte/scaffold constructs and were cultured to form engineered cartilage in vitro. The culture media were collected as conditioned media and used for chondrogenic induction of BMSC pellets (experimental group, Exp.). The chondrocyte pellets and BMSC pellets were cultured routinely as positive control (PC) and negative control (NC), respectively. After 4 weeks, the wet weight and GAG content in Exp. group and PC group were significantly higher than that in NC group. Histological and immunohistochemical analysis showed that cartilaginous tissue was formed with typical cartilage lacuna structure and positive staining of collagen Type II (Col II) in the peripheral area of the BMSC pellets in Exp. group. Gene expression of Sox9, Col II, and COMP in Exp. group and PC group were significantly higher than that in NC group. The growth factors in the conditioned media derived from human costal chondrocytes-scaffold constructs were tested by protein microassay. The conditioned media contained low levels of TGF-β1,2,3, IGF-1 and high levels of IGF-2, FGF-4, and IGFBP4,6, and so forth. The soluble factors derived from the engineered cartilage can induce chondrogenic differentiation of BMSCs independently. Many cytokines may function in chondrogenesis in a coordinated way.
Collapse
Affiliation(s)
- Jinchun Liu
- Department of Reseach Center, Plastic Surgery Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, 100144 Peking, China
| | | | | | | | | |
Collapse
|
96
|
Han G, Shao H, Zhu X, Wang G, Liu F, Wang F, Ling P, Zhang T. The protective effect of xanthan gum on interleukin-1β induced rabbit chondrocytes. Carbohydr Polym 2012; 89:870-5. [PMID: 24750874 DOI: 10.1016/j.carbpol.2012.04.023] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2012] [Accepted: 04/07/2012] [Indexed: 11/19/2022]
Abstract
We have previously shown that intra-articular injection of xanthan gum (XG) could protect the joint cartilage and reduce osteoarthritis progression. In this study, we investigated the preliminary cytotoxicity of XG on chondrocytes, evaluated the effects of XG on the proliferation and the protein expression of matrix metalloproteinases (MMPs), tissue inhibitors of metalloproteinase-1 (TIMP-1) in interleukin-1β (IL-1β)-induced rabbit chondrocytes. Primary rabbit chondrocytes were cultured. After treatment with various concentrations of XG with or without 10 ng/mL IL-1β, the proliferation of chondrocytes was evaluated using the MTT assay and the expression levels of MMPs and TIMP-1 were evaluated using ELISA. The results showed that XG alone displayed no adverse effects on cell viability and reversed significantly IL-1β-reduced cell proliferation in a dose-dependent manner. Furthermore, XG showed a dose-dependent inhibition in the IL-1β-induced release of MMPs while increasing TIMP-1 expression. These results strongly suggest that XG affords protection on IL-1β induced rabbit chondrocytes.
Collapse
Affiliation(s)
- Guanying Han
- School of Pharmaceutical Sciences, Liaoning Medical University, Jinzhou 121001, China; Post-doctoral Scientific Research Workstation, Institute of Biopharmaceuticals of Shandong Province, Jinan 250101, China; School of Pharmaceutical Sciences, Shandong University, Jinan 250101, China
| | - Huarong Shao
- Post-doctoral Scientific Research Workstation, Institute of Biopharmaceuticals of Shandong Province, Jinan 250101, China; School of Pharmaceutical Sciences, Shandong University, Jinan 250101, China
| | - Xiqiang Zhu
- Post-doctoral Scientific Research Workstation, Institute of Biopharmaceuticals of Shandong Province, Jinan 250101, China
| | - Guilan Wang
- Post-doctoral Scientific Research Workstation, Institute of Biopharmaceuticals of Shandong Province, Jinan 250101, China; School of Pharmaceutical Sciences, Shandong University, Jinan 250101, China
| | - Fei Liu
- Post-doctoral Scientific Research Workstation, Institute of Biopharmaceuticals of Shandong Province, Jinan 250101, China
| | - Fengshan Wang
- School of Pharmaceutical Sciences, Shandong University, Jinan 250101, China
| | - Peixue Ling
- Post-doctoral Scientific Research Workstation, Institute of Biopharmaceuticals of Shandong Province, Jinan 250101, China; School of Pharmaceutical Sciences, Shandong University, Jinan 250101, China
| | - Tianmin Zhang
- Post-doctoral Scientific Research Workstation, Institute of Biopharmaceuticals of Shandong Province, Jinan 250101, China; School of Pharmaceutical Sciences, Shandong University, Jinan 250101, China
| |
Collapse
|
97
|
Qusous A, Kaneva M, Can VC, Getting SJ, Kerrigan MJP. The phenotypic characterization of A13/BACii, a novel bovine chondrocytic cell line with differentiation potential. Cells Tissues Organs 2012; 196:251-61. [PMID: 22398355 DOI: 10.1159/000332144] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/24/2011] [Indexed: 11/19/2022] Open
Abstract
In cartilage research bovine articular cartilage is used as an alternative to human tissue. However, animal material is subject to availability and primary cultures undergo senescence, limiting their use. Here we report the immortalization of primary bovine chondrocytes, which could be used as a surrogate for freshly isolated chondrocytes. Chondrocytes were isolated from cartilage explants and immortalized using 1.0 µg/ml benzo[alpha]pyrene. For 3-dimensional culture, chondrocytes were resuspended in 0.5% low-melt agarose at high density (HD) and cultured for 24 h prior to determining changes in expression profile and morphology. A13/BACii chondrocytes acquired a 'flat' irregular morphology and a foetal-like cell volume (1,509.59 ± 182.04 µm(3)). The human cell line C-20/A4 showed a statistically similar volume and length to A13/BACii. Two-dimensional-cultured A13/BACii expressed elevated levels of type I collagen (col1), reduced levels of type II collagen (col2) compared to freshly isolated chondrocytes and an overall col2 to col1 expression ratio (col2:col1) of 0.11 ± 0.01. Upon 3-dimensional encapsulation, there was a significant rise in col2 expression in both A13/BACii and C-20/A4, suggesting a capacity for redifferentiation in both cell lines with a return of col2:col1 values of A13/BACii to values previously observed in primary chondrocytes. A13/BACii chondrocytes expressed aggrecan, matrix metalloproteinase (MMP)-3, MMP-9 and MMP-13, further supporting indications of the differentiated phenotype. Here we report the creation of a novel chondrocytic cell line and demonstrate its strong potential for redifferentiation upon HD 3-dimensional encapsulation, providing an alternative to conventional dedifferentiated cell lines and primary culture.
Collapse
Affiliation(s)
- Ala Qusous
- School of Life Sciences, University of Dundee, Dundee, UK.
| | | | | | | | | |
Collapse
|
98
|
McNary SM, Athanasiou KA, Reddi AH. Engineering lubrication in articular cartilage. TISSUE ENGINEERING PART B-REVIEWS 2012; 18:88-100. [PMID: 21955119 DOI: 10.1089/ten.teb.2011.0394] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Despite continuous progress toward tissue engineering of functional articular cartilage, significant challenges still remain. Advances in morphogens, stem cells, and scaffolds have resulted in enhancement of the bulk mechanical properties of engineered constructs, but little attention has been paid to the surface mechanical properties. In the near future, engineered tissues will be able to withstand and support the physiological compressive and tensile forces in weight-bearing synovial joints such as the knee. However, there is an increasing realization that these tissue-engineered cartilage constructs will fail without the optimal frictional and wear properties present in native articular cartilage. These characteristics are critical to smooth, pain-free joint articulation and a long-lasting, durable cartilage surface. To achieve optimal tribological properties, engineered cartilage therapies will need to incorporate approaches and methods for functional lubrication. Steady progress in cartilage lubrication in native tissues has pushed the pendulum and warranted a shift in the articular cartilage tissue-engineering paradigm. Engineered tissues should be designed and developed to possess both tribological and mechanical properties mirroring natural cartilage. In this article, an overview of the biology and engineering of articular cartilage structure and cartilage lubrication will be presented. Salient progress in lubrication treatments such as tribosupplementation, pharmacological, and cell-based therapies will be covered. Finally, frictional assays such as the pin-on-disk tribometer will be addressed. Knowledge related to the elements of cartilage lubrication has progressed and, thus, an opportune moment is provided to leverage these advances at a critical step in the development of mechanically and tribologically robust, biomimetic tissue-engineered cartilage. This article is intended to serve as the first stepping stone toward future studies in functional tissue engineering of articular cartilage that begins to explore and incorporate methods of lubrication.
Collapse
Affiliation(s)
- Sean M McNary
- Department of Orthopaedic Surgery, Lawrence Ellison Center for Tissue Regeneration and Repair, School of Medicine, University of California, Davis, Sacramento, California, USA
| | | | | |
Collapse
|
99
|
Chiang H, Hsieh CH, Lin YH, Lin S, Tsai-Wu JJ, Jiang CC. Differences Between Chondrocytes and Bone Marrow-Derived Chondrogenic Cells. Tissue Eng Part A 2011; 17:2919-29. [DOI: 10.1089/ten.tea.2010.0732] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Affiliation(s)
| | | | - Yun-Han Lin
- Center for Optoelectronic Biomedicine, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Shiming Lin
- Center for Optoelectronic Biomedicine, College of Medicine, National Taiwan University, Taipei, Taiwan
- Institute of Applied Mechanics, National Taiwan University, Taipei, Taiwan
| | | | | |
Collapse
|
100
|
Teixeira LSM, Feijen J, van Blitterswijk CA, Dijkstra PJ, Karperien M. Enzyme-catalyzed crosslinkable hydrogels: emerging strategies for tissue engineering. Biomaterials 2011; 33:1281-90. [PMID: 22118821 DOI: 10.1016/j.biomaterials.2011.10.067] [Citation(s) in RCA: 386] [Impact Index Per Article: 29.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2011] [Accepted: 10/22/2011] [Indexed: 12/12/2022]
Abstract
State-of-the-art bioactive hydrogels can easily and efficiently be formed by enzyme-catalyzed mild-crosslinking reactions in situ. Yet this cell-friendly and substrate-specific method remains under explored. Hydrogels prepared by using enzyme systems like tyrosinases, transferases and lysyl oxidases show interesting characteristics as dynamic scaffolds and as systems for controlled release. Increased attention is currently paid to hydrogels obtained via crosslinking of precursors by transferases or peroxidases as catalysts. Enzyme-mediated crosslinking has proven its efficiency and attention has now shifted to the development of enzymatically crosslinked hydrogels with higher degrees of complexity, mimicking extracellular matrices. Moreover, bottom-up approaches combining biocatalysts and self-assembly are being explored for the development of complex nano-scale architectures. In this review, the use of enzymatic crosslinking for the preparation of hydrogels as an innovative alternative to other crosslinking methods, such as the commonly used UV-mediated photo-crosslinking or physical crosslinking, will be discussed. Photo-initiator-based crosslinking may induce cytotoxicity in the formed gels, whereas physical crosslinking may lead to gels which do not have sufficient mechanical strength and stability. These limitations can be overcome using enzymes to form covalently crosslinked hydrogels. Herewith, we report the mechanisms involved and current applications, focusing on emerging strategies for tissue engineering and regenerative medicine.
Collapse
Affiliation(s)
- Liliana S Moreira Teixeira
- Department of Tissue Regeneration, Faculty of Science and Technology, University of Twente, Enschede, The Netherlands
| | | | | | | | | |
Collapse
|