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Valdivia M, Vega-Macaya F, Olguín P. Mechanical Control of Myotendinous Junction Formation and Tendon Differentiation during Development. Front Cell Dev Biol 2017; 5:26. [PMID: 28386542 PMCID: PMC5362613 DOI: 10.3389/fcell.2017.00026] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2016] [Accepted: 03/07/2017] [Indexed: 01/01/2023] Open
Abstract
The development of the musculoskeletal system is a great model to study the interplay between chemical and mechanical inter-tissue signaling in cell adhesion, tissue morphogenesis and differentiation. In both vertebrates and invertebrates (e.g., Drosophila melanogaster) the formation of muscle-tendon interaction generates mechanical forces which are required for myotendinous junction maturation and tissue differentiation. In addition, these forces must be withstood by muscles and tendons in order to prevent detachment from each other, deformation or even losing their integrity. Extracellular matrix remodeling at the myotendinous junction is key to resist mechanical load generated by muscle contraction. Recent evidences in vertebrates indicate that mechanical forces generated during junction formation regulate chemical signaling leading to extracellular matrix remodeling, however, the mechanotransduction mechanisms associated to this response remains elusive. In addition to extracellular matrix remodeling, the ability of Drosophila tendon-cells to bear mechanical load depends on rearrangement of tendon cell cytoskeleton, thus studying the molecular mechanisms involved in this process is critical to understand the contribution of mechanical forces to the development of the musculoskeletal system. Here, we review recent findings regarding the role of chemical and mechanical signaling in myotendinous junction formation and tendon differentiation, and discuss molecular mechanisms of mechanotransduction that may allow tendon cells to withstand mechanical load during development of the musculoskeletal system.
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Affiliation(s)
- Mauricio Valdivia
- Program in Human Genetics, Faculty of Medicine, Institute of Biomedical Sciences, Biomedical Neurosciences Institute, University of Chile Santiago, Chile
| | - Franco Vega-Macaya
- Program in Human Genetics, Faculty of Medicine, Institute of Biomedical Sciences, Biomedical Neurosciences Institute, University of Chile Santiago, Chile
| | - Patricio Olguín
- Program in Human Genetics, Faculty of Medicine, Institute of Biomedical Sciences, Biomedical Neurosciences Institute, University of Chile Santiago, Chile
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52
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Scleraxis is required for maturation of tissue domains for proper integration of the musculoskeletal system. Sci Rep 2017; 7:45010. [PMID: 28327634 PMCID: PMC5361204 DOI: 10.1038/srep45010] [Citation(s) in RCA: 73] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2016] [Accepted: 02/20/2017] [Indexed: 12/17/2022] Open
Abstract
Scleraxis (Scx) is a basic helix-loop-helix transcription factor that is expressed persistently in tendons/ligaments, but transiently in entheseal cartilage. In this study, we generated a novel ScxCre knock-in (KI) allele, by in-frame replacement of most of Scx exon 1 with Cre recombinase (Cre), to drive Cre expression using Scx promoter and to inactivate the endogenous Scx. Reflecting the intensity and duration of endogenous expression, Cre-mediated excision occurs in tendinous and ligamentous tissues persistently expressing Scx. Expression of tenomodulin, a marker of mature tenocytes and ligamentocytes, was almost absent in tendons and ligaments of ScxCre/Cre KI mice lacking Scx to indicate defective maturation. In homozygotes, the transiently Scx-expressing entheseal regions such as the rib cage, patella cartilage, and calcaneus were small and defective and cartilaginous tuberosity was missing. Decreased Sox9 expression and phosphorylation of Smad1/5 and Smad3 were also observed in the developing entheseal cartilage, patella, and deltoid tuberosity of ScxCre/Cre KI mice. These results highlighted the functional importance of both transient and persistent expression domains of Scx for proper integration of the musculoskeletal components.
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53
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Bavin EP, Atkinson F, Barsby T, Guest DJ. Scleraxis Is Essential for Tendon Differentiation by Equine Embryonic Stem Cells and in Equine Fetal Tenocytes. Stem Cells Dev 2017; 26:441-450. [DOI: 10.1089/scd.2016.0279] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Affiliation(s)
- Emma P. Bavin
- Centre for Preventive Medicine, Animal Health Trust, Newmarket, United Kingdom
| | - Francesca Atkinson
- Centre for Preventive Medicine, Animal Health Trust, Newmarket, United Kingdom
| | - Tom Barsby
- Centre for Preventive Medicine, Animal Health Trust, Newmarket, United Kingdom
| | - Debbie J. Guest
- Centre for Preventive Medicine, Animal Health Trust, Newmarket, United Kingdom
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54
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Durgam S, Stewart M. Cellular and Molecular Factors Influencing Tendon Repair. TISSUE ENGINEERING PART B-REVIEWS 2017; 23:307-317. [PMID: 28092213 DOI: 10.1089/ten.teb.2016.0445] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Tendons are complex connective tissues that transmit tensile forces between muscles and tendons. Tendon injuries are among the most common orthopedic problems with long-term disability as a frequent consequence due to prolonged healing time. Furthermore, the repair tissue is of inferior quality, predisposing patients to high rates of recurrence following initial injury. Coordinated cellular processes and biological factors under the influence of mechanical loading are involved in tendon healing and our understanding of these events lags behind other musculoskeletal tissues. Tendons are relatively hypocellular and hypovascular, with little or no intrinsic regenerative capacity. Studies have documented fatty degeneration, chondrogenic dysplasia, and ectopic ossification within tendon repair tissue. The underlying pathogenesis for these metaplastic changes that compromise the quality of tendon repair tissue is poorly understood. The purpose of this review is to compile literature reporting molecular processes that regulate/control the phenotype of cells responsible for abnormal matrix deposition at repair site. In addition, recent studies reporting the interplay of mechanotransduction and cellular responses during tendon repair are summarized. Identifying the links between cellular, biological, and mechanical parameters involved in tendon repair is paramount to develop successful therapies for tendon healing.
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Affiliation(s)
- Sushmitha Durgam
- 1 Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University , Columbus, Ohio
| | - Matthew Stewart
- 2 Department of Veterinary Clinical Medicine, College of Veterinary Medicine, University of Illinois , Urbana, Illinois
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55
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Downregulation of CITED2 contributes to TGFβ-mediated senescence of tendon-derived stem cells. Cell Tissue Res 2017; 368:93-104. [PMID: 28084522 DOI: 10.1007/s00441-016-2552-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2016] [Accepted: 11/29/2016] [Indexed: 02/07/2023]
Abstract
Tendon-derived stem cells (TDSCs) are multipotent adult stem cells with potential applications in tendon and tendon-bone junction repair. However, cellular characteristics change during in vitro passaging. Therefore, elucidation of the molecular and cellular mechanisms of tendon aging will be essential for the development of TDSC-based therapies. The aim of this study is to investigate the effect of CITED2, a nuclear regulator and transforming growth factor β2 (TGFβ2) on TDSC proliferation and senescence by comparing cells derived from Achilles tendon biopsies of young individuals (Y-TDSC) with those of older patients (O-TDSC). Our results showed that CITED2 mRNA and protein expression levels were significantly higher in Y-TDSCs than in O-TDSCs and O-TDSCs displayed decreased proliferation and increased senescence compared with Y-TDSCs. Furthermore, high levels of CITED2 protein expression in Y-TDSCs correlated with the downregulation of SP1 and p21 and the upregulation of MYC, potentially indicating the mechanism by which CITED2 upregulates TDSC proliferation. TGFβ2 was found to downregulate the expression of the CITED2 gene and knockdown of CITED2 abolished the effect of TGFβ2 on TDSC proliferation and senescence. Thus, the downregulation of CITED2 contributes to TGFβ-mediated senescence providing an insight into the molecular and cellular mechanisms that contribute to tendon aging and degeneration. Our findings may aid the development of cell-based therapies for tendon repair.
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56
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Chen YY, He ST, Yan FH, Zhou PF, Luo K, Zhang YD, Xiao Y, Lin MK. Dental pulp stem cells express tendon markers under mechanical loading and are a potential cell source for tissue engineering of tendon-like tissue. Int J Oral Sci 2016; 8:213-222. [PMID: 27811845 PMCID: PMC5168414 DOI: 10.1038/ijos.2016.33] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/07/2016] [Indexed: 12/29/2022] Open
Abstract
Postnatal mesenchymal stem cells have the capacity to differentiate into multiple cell lineages. This study explored the possibility of dental pulp stem cells (DPSCs) for potential application in tendon tissue engineering. The expression of tendon-related markers such as scleraxis, tenascin-C, tenomodulin, eye absent homologue 2, collagens I and VI was detected in dental pulp tissue. Interestingly, under mechanical stimulation, these tendon-related markers were significantly enhanced when DPSCs were seeded in aligned polyglycolic acid (PGA) fibre scaffolds. Furthermore, mature tendon-like tissue was formed after transplantation of DPSC-PGA constructs under mechanical loading conditions in a mouse model. This study demonstrates that DPSCs could be a potential stem cell source for tissue engineering of tendon-like tissue.
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Affiliation(s)
- Yu-Ying Chen
- Department of Stomatology, Fujian Provincial Hospital, Fuzhou, China.,School and Hospital of Stomatology, Fujian Medical University, Fuzhou, China
| | - Sheng-Teng He
- Department of Stomatology, Hainan Province Nongken Sanya Hospital, Sanya, China
| | - Fu-Hua Yan
- Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, China.,Australia-China Centre for Tissue Engineering and Regenerative Medicine, Queensland University of Technology, Brisbane, Australia
| | - Peng-Fei Zhou
- School and Hospital of Stomatology, Fujian Medical University, Fuzhou, China
| | - Kai Luo
- School and Hospital of Stomatology, Fujian Medical University, Fuzhou, China
| | - Yan-Ding Zhang
- College of Life Science, Fujian Normal University, Fuzhou, China
| | - Yin Xiao
- Australia-China Centre for Tissue Engineering and Regenerative Medicine, Queensland University of Technology, Brisbane, Australia.,Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, Australia
| | - Min-Kui Lin
- School and Hospital of Stomatology, Fujian Medical University, Fuzhou, China
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57
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Abstract
Tendons are important components of our musculoskeletal system. Injuries to these tissues are very common, resulting from occupational-related injuries, sports-related trauma, and age-related degeneration. Unfortunately, there are few treatment options, and current therapies rarely restore injured tendons to their original function. An improved understanding of the pathways regulating their development and repair would have significant impact in stimulating the formulation of regenerative-based approaches for tendon injury. The zebrafish provides an ideal system in which to perform genetic and chemical screens to identify new pathways involved in tendon biology. Until recently, there had been few descriptions of tendons and ligaments in the zebrafish and their similarity to mammalian tendon tissues. In this chapter, we describe the development of the zebrafish tendon and ligament tissues in the context of their gene expression, structure, and interactions with neighboring musculoskeletal tissues. We highlight the similarities with tendon development in higher vertebrates, showing that the craniofacial tendons and ligaments in zebrafish morphologically, molecularly, and structurally resemble mammalian tendons and ligaments from embryonic to adult stages. We detail methods for fluorescent in situ hybridization and immunohistochemistry as an assay to examine morphological changes in the zebrafish musculoskeleton. Staining assays such as these could provide the foundation for screen-based approaches to identify new regulators of tendon development, morphogenesis, and repair. These discoveries would provide new targets and pathways to study in the context of regenerative medicine-based approaches to improve tendon healing.
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Affiliation(s)
- J W Chen
- Massachusetts General Hospital, Boston, MA, United States; Harvard Medical School, Boston, MA, United States
| | - J L Galloway
- Massachusetts General Hospital, Boston, MA, United States; Harvard Medical School, Boston, MA, United States
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58
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Induction of Tenogenic Differentiation Mediated by Extracellular Tendon Matrix and Short-Term Cyclic Stretching. Stem Cells Int 2016; 2016:7342379. [PMID: 27630718 PMCID: PMC5007347 DOI: 10.1155/2016/7342379] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Accepted: 06/29/2016] [Indexed: 12/16/2022] Open
Abstract
Tendon and ligament pathologies are still a therapeutic challenge, due to the difficulty in restoring the complex extracellular matrix architecture and biomechanical strength. While progress is being made in cell-based therapies and tissue engineering approaches, comprehensive understanding of the fate of progenitor cells in tendon healing is still lacking. The aim of this study was to investigate the effect of decellularized tendon matrix and moderate cyclic stretching as natural stimuli which could potentially direct tenogenic fate. Equine adipose-derived mesenchymal stromal cells (MSC) were seeded on decellularized tendon matrix scaffolds. Mechanical stimulation was applied in a custom-made cyclic strain bioreactor. Assessment was performed 4 h, 8 h, and 24 h following mechanical stimulation. Scaffold culture induced cell alignment and changes in expression of tendon-related genes, although cell viability was decreased compared to monolayer culture. Short mechanical stimulation periods enhanced most of the scaffold-induced effects. Collagen 1A2 expression levels were decreased, while collagen 3A1 and decorin levels were increased. Tenascin-C and scleraxis expression showed an initial decrease but had increased 24 h after stimulation. The results obtained suggest that decellularized tendon matrix, supported by cyclic stretching, can induce tenogenic differentiation and the synthesis of tendon components important for matrix remodeling.
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59
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Langhans MT, Yu S, Tuan RS. Stem Cells in Skeletal Tissue Engineering: Technologies and Models. Curr Stem Cell Res Ther 2016; 11:453-474. [PMID: 26423296 DOI: 10.2174/1574888x10666151001115248] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2015] [Revised: 04/01/2015] [Accepted: 04/01/2015] [Indexed: 12/14/2022]
Abstract
This review surveys the use of pluripotent and multipotent stem cells in skeletal tissue engineering. Specific emphasis is focused on evaluating the function and activities of these cells in the context of development in vivo, and how technologies and methods of stem cell-based tissue engineering for stem cells must draw inspiration from developmental biology. Information on the embryonic origin and in vivo differentiation of skeletal tissues is first reviewed, to shed light on the persistence and activities of adult stem cells that remain in skeletal tissues after embryogenesis. Next, the development and differentiation of pluripotent stem cells is discussed, and some of their advantages and disadvantages in the context of tissue engineering are presented. The final section highlights current use of multipotent adult mesenchymal stem cells, reviewing their origin, differentiation capacity, and potential applications to tissue engineering.
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Affiliation(s)
| | | | - Rocky S Tuan
- 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.
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60
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Subramanian A, Schilling TF. Tendon development and musculoskeletal assembly: emerging roles for the extracellular matrix. Development 2016; 142:4191-204. [PMID: 26672092 DOI: 10.1242/dev.114777] [Citation(s) in RCA: 99] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Tendons and ligaments are extracellular matrix (ECM)-rich structures that interconnect muscles and bones. Recent work has shown how tendon fibroblasts (tenocytes) interact with muscles via the ECM to establish connectivity and strengthen attachments under tension. Similarly, ECM-dependent interactions between tenocytes and cartilage/bone ensure that tendon-bone attachments form with the appropriate strength for the force required. Recent studies have also established a close lineal relationship between tenocytes and skeletal progenitors, highlighting the fact that defects in signals modulated by the ECM can alter the balance between these fates, as occurs in calcifying tendinopathies associated with aging. The dynamic fine-tuning of tendon ECM composition and assembly thus gives rise to the remarkable characteristics of this unique tissue type. Here, we provide an overview of the functions of the ECM in tendon formation and maturation that attempts to integrate findings from developmental genetics with those of matrix biology.
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Affiliation(s)
- Arul Subramanian
- Department of Developmental and Cell Biology, University of California, Irvine, Irvine, CA 92697-2300, USA
| | - Thomas F Schilling
- Department of Developmental and Cell Biology, University of California, Irvine, Irvine, CA 92697-2300, USA
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61
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Hsieh CF, Alberton P, Loffredo-Verde E, Volkmer E, Pietschmann M, Müller P, Schieker M, Docheva D. Scaffold-free Scleraxis-programmed tendon progenitors aid in significantly enhanced repair of full-size Achilles tendon rupture. Nanomedicine (Lond) 2016; 11:1153-67. [DOI: 10.2217/nnm.16.34] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Aim: Currently there is no effective approach to enhance tendon repair, hence we aimed to identify a suitable cell source for tendon engineering utilizing an established clinically relevant animal model for tendon injury. Materials & methods: We compared, by in-depth histomorphometric evaluation, the regenerative potential of uncommitted human mesenchymal stem cells (hMSC) and Scleraxis (Scx)-programmed tendon progenitors (hMSC-Scx) in the healing of a full-size of rat Achilles tendon defect. Results: Our analyses clearly demonstrated that implantation of hMSC-Scx, in contrast to hMSC and empty defect, results in smaller diameters, negligible ectopic calcification and advanced cellular organization and matrix maturation in the injured tendons. Conclusion: Scaffold-free delivery of hMSC-Scx aids in enhanced repair in a clinically translatable Achilles tendon injury model.
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Affiliation(s)
- Chi-Fen Hsieh
- Experimental Surgery & Regenerative Medicine, Department of Surgery, Ludwig-Maximilians-University (LMU), Nussbaumstr. 20, 80336 Munich, Germany
| | - Paolo Alberton
- Experimental Surgery & Regenerative Medicine, Department of Surgery, Ludwig-Maximilians-University (LMU), Nussbaumstr. 20, 80336 Munich, Germany
| | - Eva Loffredo-Verde
- Experimental Surgery & Regenerative Medicine, Department of Surgery, Ludwig-Maximilians-University (LMU), Nussbaumstr. 20, 80336 Munich, Germany
| | - Elias Volkmer
- Experimental Surgery & Regenerative Medicine, Department of Surgery, Ludwig-Maximilians-University (LMU), Nussbaumstr. 20, 80336 Munich, Germany
| | - Matthias Pietschmann
- Department of Orthopaedic Surgery, Physical Medicine & Rehabilitation, University Hospital Grosshadern, LMU, Marchioninistr. 15, 81377 Munich, Germany
| | - Peter Müller
- Department of Orthopaedic Surgery, Physical Medicine & Rehabilitation, University Hospital Grosshadern, LMU, Marchioninistr. 15, 81377 Munich, Germany
| | - Matthias Schieker
- Experimental Surgery & Regenerative Medicine, Department of Surgery, Ludwig-Maximilians-University (LMU), Nussbaumstr. 20, 80336 Munich, Germany
| | - Denitsa Docheva
- Experimental Surgery & Regenerative Medicine, Department of Surgery, Ludwig-Maximilians-University (LMU), Nussbaumstr. 20, 80336 Munich, Germany
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62
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Shukunami C, Yoshimoto Y, Takimoto A, Yamashita H, Hiraki Y. Molecular characterization and function of tenomodulin, a marker of tendons and ligaments that integrate musculoskeletal components. JAPANESE DENTAL SCIENCE REVIEW 2016; 52:84-92. [PMID: 28408960 PMCID: PMC5390337 DOI: 10.1016/j.jdsr.2016.04.003] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2015] [Revised: 03/16/2016] [Accepted: 04/01/2016] [Indexed: 01/14/2023] Open
Abstract
Tendons and ligaments are dense fibrous bands of connective tissue that integrate musculoskeletal components in vertebrates. Tendons connect skeletal muscles to the bone and function as mechanical force transmitters, whereas ligaments bind adjacent bones together to stabilize joints and restrict unwanted joint movement. Fibroblasts residing in tendons and ligaments are called tenocytes and ligamentocytes, respectively. Tenomodulin (Tnmd) is a type II transmembrane glycoprotein that is expressed at high levels in tenocytes and ligamentocytes, and is also present in periodontal ligament cells and tendon stem/progenitor cells. Tnmd is related to chondromodulin-1 (Chm1), a cartilage-derived angiogenesis inhibitor, and both Tnmd and Chm1 are expressed in the CD31− avascular mesenchyme. The conserved C-terminal hydrophobic domain of these proteins, which is characterized by the eight Cys residues to form four disulfide bonds, may have an anti-angiogenic function. This review highlights the molecular characterization and function of Tnmd, a specific marker of tendons and ligaments.
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Affiliation(s)
- Chisa Shukunami
- Department of Molecular Biology and Biochemistry, Division of Basic Life Sciences, Institute of Biomedical and Health Sciences, Hiroshima University, Hiroshima 734-8553, Japan
| | - Yuki Yoshimoto
- Department of Molecular Biology and Biochemistry, Division of Basic Life Sciences, Institute of Biomedical and Health Sciences, Hiroshima University, Hiroshima 734-8553, Japan
| | - Aki Takimoto
- Department of Cellular Differentiation, Institute for Frontier Medical Sciences, Kyoto University, Kyoto 606-8507, Japan
| | - Hiroshi Yamashita
- Department of Molecular Biology and Biochemistry, Division of Basic Life Sciences, Institute of Biomedical and Health Sciences, Hiroshima University, Hiroshima 734-8553, Japan
| | - Yuji Hiraki
- Department of Cellular Differentiation, Institute for Frontier Medical Sciences, Kyoto University, Kyoto 606-8507, Japan
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63
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Dex S, Lin D, Shukunami C, Docheva D. Tenogenic modulating insider factor: Systematic assessment on the functions of tenomodulin gene. Gene 2016; 587:1-17. [PMID: 27129941 DOI: 10.1016/j.gene.2016.04.051] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Revised: 04/20/2016] [Accepted: 04/25/2016] [Indexed: 02/08/2023]
Abstract
Tenomodulin (TNMD, Tnmd) is a gene highly expressed in tendon known to be important for tendon maturation with key implications for the residing tendon stem/progenitor cells as well as for the regulation of endothelial cell migration in chordae tendineae cordis in the heart and in experimental tumour models. This review aims at providing an encompassing overview of this gene and its protein. In addition, its known expression pattern as well as putative signalling pathways will be described. A chronological overview of the discovered functions of this gene in tendon and other tissues and cells is provided as well as its use as a tendon and ligament lineage marker is assessed in detail and discussed. Last, information about the possible connections between TNMD genomic mutations and mRNA expression to various diseases is delivered. Taken together this review offers a solid synopsis on the up-to-date information available about TNMD and aids at directing and focusing the future research to fully uncover the roles and implications of this interesting gene.
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Affiliation(s)
- Sarah Dex
- Experimental Surgery and Regenerative Medicine, Department of Surgery, Ludwig-Maximilians-University (LMU), Munich, Germany
| | - Dasheng Lin
- Experimental Surgery and Regenerative Medicine, Department of Surgery, Ludwig-Maximilians-University (LMU), Munich, Germany
| | - Chisa Shukunami
- Department of Molecular Biology and Biochemistry, Division of Basic Life Sciences, Institute of Biomedical & Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Denitsa Docheva
- Experimental Surgery and Regenerative Medicine, Department of Surgery, Ludwig-Maximilians-University (LMU), Munich, Germany; Department of Medical Biology, Medical University-Plovdiv, Plovdiv, Bulgaria.
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64
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Jiang Y, Shi Y, He J, Zhang Z, Zhou G, Zhang W, Cao Y, Liu W. Enhanced tenogenic differentiation and tendon-like tissue formation by tenomodulin overexpression in murine mesenchymal stem cells. J Tissue Eng Regen Med 2016; 11:2525-2536. [PMID: 27098985 DOI: 10.1002/term.2150] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Revised: 11/12/2015] [Accepted: 12/22/2015] [Indexed: 01/22/2023]
Affiliation(s)
- Yongkang Jiang
- Department of Plastic and Reconstructive Surgery shanghai 9th People's Hospital; People's Republic of China
| | - Yuan Shi
- Department of Plastic and Reconstructive Surgery shanghai 9th People's Hospital; People's Republic of China
| | - Jing He
- Department of Anatomy and Neurobiology; Tongji University School of Medicine; Shanghai People's Republic of China
| | - Zhiyong Zhang
- Department of Plastic and Reconstructive Surgery shanghai 9th People's Hospital; People's Republic of China
- National Tissue Engineering Centre of China; Shanghai People's Republic of China
| | - Guangdong Zhou
- Department of Plastic and Reconstructive Surgery shanghai 9th People's Hospital; People's Republic of China
- National Tissue Engineering Centre of China; Shanghai People's Republic of China
| | - Wenjie Zhang
- Department of Plastic and Reconstructive Surgery shanghai 9th People's Hospital; People's Republic of China
- National Tissue Engineering Centre of China; Shanghai People's Republic of China
| | - Yilin Cao
- Department of Plastic and Reconstructive Surgery shanghai 9th People's Hospital; People's Republic of China
- National Tissue Engineering Centre of China; Shanghai People's Republic of China
| | - Wei Liu
- Department of Plastic and Reconstructive Surgery shanghai 9th People's Hospital; People's Republic of China
- National Tissue Engineering Centre of China; Shanghai People's Republic of China
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65
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Therapeutic Roles of Tendon Stem/Progenitor Cells in Tendinopathy. Stem Cells Int 2016; 2016:4076578. [PMID: 27195010 PMCID: PMC4853952 DOI: 10.1155/2016/4076578] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2015] [Accepted: 03/10/2016] [Indexed: 02/07/2023] Open
Abstract
Tendinopathy is a tendon disorder characterized by activity-related pain, local edema, focal tenderness to palpation, and decreased strength in the affected area. Tendinopathy is prevalent in both athletes and the general population, highlighting the need to elucidate the pathogenesis of this disorder. Current treatments of tendinopathy are both conservative and symptomatic. The discovery of tendon stem/progenitor cells (TSPCs) and erroneous differentiation of TSPCs have provided new insights into the pathogenesis of tendinopathy. In this review, we firstly present the histopathological characteristics of tendinopathy and explore the cellular and molecular cues in the pathogenesis of tendinopathy. Current evidence of the depletion of the stem cell pool and altered TSPCs fate in the pathogenesis of tendinopathy has been presented. The potential regulatory factors for either tenogenic or nontenogenic differentiation of TSPCs are also summarized. The regulation of endogenous TSPCs or supplementation with exogenous TSPCs as therapeutic targets for the treatment of tendinopathy is proposed. Therefore, inhibiting the erroneous differentiation of TSPCs and regulating the differentiation of TSPCs into tendon cells might be important areas of future research and could provide new clinical treatments for tendinopathy. The current evidence suggests that TSPCs are promising therapeutic targets for the management of tendinopathy.
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66
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Yu Y, Lee SY, Yang EJ, Kim HY, Jo I, Shin SJ. Expression of tenocyte lineage-related factors from tonsil-derived mesenchymal stem cells. Tissue Eng Regen Med 2016; 13:162-170. [PMID: 30603396 DOI: 10.1007/s13770-016-9134-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2015] [Revised: 01/20/2016] [Accepted: 01/22/2016] [Indexed: 01/11/2023] Open
Abstract
Human palatine tonsil-derived mesenchymal stem cells (TMSCs) are known to be a new source of progenitor cells. Using waste tissue after tonsillectomy as a cell provider can be the biggest benefit of TMSCs, compared with other stem cells. The purpose of this study was to investigate tenogenic differentiation of TMSCs and to access the differential effects of transforming growth factor beta 3 (TGF-β3) on the tenogenesis of TMSCs. Human tonsil was obtained after tonsillectomy. Using a cytometric analysis, we were able to find that the TMSCs had typical mesenchymal stem cell markers: positive for CD73, CD90, and CD105, and negative for CD14, CD34, and CD45. Using TGF-β3, the expressions of tenocyte-specific genes and proteins, such as collagen type 1 (COL1), tenomodulin (TNMD), and scleraxis (SCX), were measured by a quantitative polymerase chain reaction (PCR), immunofluorescence staining, immunohistochemistry and Western blot analyses. Quantitative PCR assay showed that TGF-β3 significantly increased the expressions of tenocyte lineage marker genes, including COL1, TNMD, and SCX, at a 3-day treatment, compared with control. However, these increases were not found at long-term exposures (7 or 10 days), except that TNMD expression was maintained at 50 ng/mL at a 7-day exposure to TGF-β3. Like genes, the protein expression levels of COL1, TNMD, and SCX were also induced in TGF-β3-treated TMSCs in a 3-day treatment, which were maintained for 10 days, as evidenced by immunofluorescence staining, immunohistochemistry and Western blot analyses. This study demonstrated that TMSCs in tenogenic stimulation with TGF-β3 have a high tenogenic differentiation potential.
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Affiliation(s)
- Yeonsil Yu
- 1Department of Molecular Medicine, School of Medicine, Ewha Womans University, Seoul, Korea.,3Ewha Tonsil-derived Mesenchymal Stem Cells Research Center (ETSRC), School of Medicine, Ewha Womans University, Seoul, Korea
| | - Seung Yeol Lee
- 2Department of Orthopaedic Surgery, School of Medicine, Ewha Womans University, Seoul, Korea.,3Ewha Tonsil-derived Mesenchymal Stem Cells Research Center (ETSRC), School of Medicine, Ewha Womans University, Seoul, Korea
| | - Eun-Ji Yang
- 2Department of Orthopaedic Surgery, School of Medicine, Ewha Womans University, Seoul, Korea.,3Ewha Tonsil-derived Mesenchymal Stem Cells Research Center (ETSRC), School of Medicine, Ewha Womans University, Seoul, Korea
| | - Ha Yeong Kim
- 1Department of Molecular Medicine, School of Medicine, Ewha Womans University, Seoul, Korea.,3Ewha Tonsil-derived Mesenchymal Stem Cells Research Center (ETSRC), School of Medicine, Ewha Womans University, Seoul, Korea
| | - Inho Jo
- 1Department of Molecular Medicine, School of Medicine, Ewha Womans University, Seoul, Korea.,3Ewha Tonsil-derived Mesenchymal Stem Cells Research Center (ETSRC), School of Medicine, Ewha Womans University, Seoul, Korea
| | - Sang-Jin Shin
- 2Department of Orthopaedic Surgery, School of Medicine, Ewha Womans University, Seoul, Korea.,3Ewha Tonsil-derived Mesenchymal Stem Cells Research Center (ETSRC), School of Medicine, Ewha Womans University, Seoul, Korea
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Retinoic acid receptor signaling preserves tendon stem cell characteristics and prevents spontaneous differentiation in vitrox. Stem Cell Res Ther 2016; 7:45. [PMID: 27001426 PMCID: PMC4802591 DOI: 10.1186/s13287-016-0306-3] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2015] [Revised: 01/12/2016] [Accepted: 03/04/2016] [Indexed: 02/07/2023] Open
Abstract
Background Previous studies have reported that adult mesenchymal stem cells (MSCs) tend to gradually lose their stem cell characteristics in vitro when placed outside their niche environment. They subsequently undergo spontaneous differentiation towards mesenchymal lineages after only a few passages. We observed a similar phenomenon with adult tendon stem cells (TSCs) where expression of key tendon genes such as Scleraxis (Scx), are being repressed with time in culture. We hypothesized that an environment able to restore or maintain Scleraxis expression could be of therapeutic interest for in vitro use and tendon cell-based therapies. Methods TSCs were isolated from human cadaveric Achilles tendon and expanded for 4 passages. A high content imaging assay that monitored the induction of Scx protein nuclear localization was used to screen ~1000 known drugs. Results We identified retinoic acid receptor (RAR) agonists as potent inducers of nuclear Scx in the small molecule screen. The upregulation correlated with improved maintenance of tendon stem cell properties through inhibition of spontaneous differentiation rather than the anticipated induction of tenogenic differentiation. Our results suggest that histone epigenetic modifications by RAR are driving this effect which is not likely only dependent on Scleraxis nuclear binding but also mediated through other key genes involved in stem cell self-renewal and differentiation. Furthermore, we demonstrate that the effect of RAR compounds on TSCs is reversible by revealing their multi-lineage differentiation ability upon withdrawal of the compound. Conclusion Based on these findings, RAR agonists could provide a valid approach for maintaining TSC stemness during expansion in vitro, thus improving their regenerative potential for cell-based therapy. Electronic supplementary material The online version of this article (doi:10.1186/s13287-016-0306-3) contains supplementary material, which is available to authorized users.
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Fliefel R, Popov C, Tröltzsch M, Kühnisch J, Ehrenfeld M, Otto S. Mesenchymal stem cell proliferation and mineralization but not osteogenic differentiation are strongly affected by extracellular pH. J Craniomaxillofac Surg 2016; 44:715-24. [PMID: 27085985 DOI: 10.1016/j.jcms.2016.03.003] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2015] [Revised: 02/19/2016] [Accepted: 03/11/2016] [Indexed: 01/03/2023] Open
Abstract
UNLABELLED Osteomyelitis is a serious complication in oral and maxillofacial surgery affecting bone healing. Bone remodeling is not only controlled by cellular components but also by ionic and molecular composition of the extracellular fluids in which calcium phosphate salts are precipitated in a pH dependent manner. OBJECTIVE To determine the effect of pH on self-renewal, osteogenic differentiation and matrix mineralization of mesenchymal stem cells (MSCs). METHODS We selected three different pH values; acidic (6.3, 6.7), physiological (7.0-8.0) and severe alkaline (8.5). MSCs were cultured at different pH ranges, cell viability measured by WST-1, apoptosis detected by JC-1, senescence was analyzed by β-galactosidase whereas mineralization was detected by Alizarin Red and osteogenic differentiation analyzed by Real-time PCR. RESULTS Self-renewal was affected by pH as well as matrix mineralization in which pH other than physiologic inhibited the deposition of extracellular matrix but did not affect MSCs differentiation as osteoblast markers were upregulated. The expression of osteocalcin and alkaline phosphatase activity was upregulated whereas osteopontin was downregulated under acidic pH. CONCLUSION pH affected MSCs self-renewal and mineralization without influencing osteogenic differentiation. Thus, future therapies, based on shifting acid-base balance toward the alkaline direction might be beneficial for prevention or treatment of osteomyelitis.
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Affiliation(s)
- Riham Fliefel
- Experimental Surgery and Regenerative Medicine, Ludwig-Maximilians-University, Munich, Germany; Department of Oral and Maxillofacial Surgery, Ludwig-Maximilians-University, Munich, Germany; Department of Oral and Maxillofacial Surgery, Alexandria-University, Alexandria, Egypt.
| | - Cvetan Popov
- Experimental Surgery and Regenerative Medicine, Ludwig-Maximilians-University, Munich, Germany
| | - Matthias Tröltzsch
- Department of Oral and Maxillofacial Surgery, Ludwig-Maximilians-University, Munich, Germany
| | - Jan Kühnisch
- Department of Conservative Dentistry and Periodontology, Ludwig-Maximilians-University, Munich, Germany
| | - Michael Ehrenfeld
- Department of Oral and Maxillofacial Surgery, Ludwig-Maximilians-University, Munich, Germany
| | - Sven Otto
- Department of Oral and Maxillofacial Surgery, Ludwig-Maximilians-University, Munich, Germany
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Guo J, Chan KM, Zhang JF, Li G. Tendon-derived stem cells undergo spontaneous tenogenic differentiation. Exp Cell Res 2016; 341:1-7. [PMID: 26794903 DOI: 10.1016/j.yexcr.2016.01.007] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2015] [Revised: 01/14/2016] [Accepted: 01/16/2016] [Indexed: 12/30/2022]
Abstract
Tendon-derived stem cell (TDSC) is a subpopulation of residing stem cells within the intact tendon tissues, with the capacities of self-renewal, clonogenicity, and three-lineage differentiation. Compared with bone marrow derived mesenchymal stem cells (BMSCs), TDSCs are superior for tendon injuries repair as they remain some tendon tissue-specific differentiation properties. In the present study, TDSC was found to undergo spontaneous tenogenic differentiation in which the expression of tenogenic markers were increased while the expression of stemness markers decreased with time in TDSCs culture (without tenogenic induction medium). The further collagen synthesis ability was correspondingly increased during this process. After a longer period of culture, the monolayer of TDSCs formed a "3D" layers with rich extracellular matrices of typical tendon tissues. In addition, the key tenogenic transcription factors, such as Scx, Mkx, Egr1 and Eya1 were all up-regulated in this process. Finally, we compared the spontaneous tenogenic differentiation with TGF-β1-induced tenogenic differentiation of TDSCs, and the results showed that the spontaneous tenogenic differentiation of TDSCs was general character of TDSCs, similar to but weaker than the effect of TDSCs under tenogenic induction. Taken together, the present study identified that TDSCs had the potential of spontaneous tenogenic differentiation, which may be a better cell source for the treatment of tendon injury.
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Affiliation(s)
- Jia Guo
- Department of Orthopaedics & Traumatology, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong SAR, PR China
| | - Kai-Ming Chan
- Department of Orthopaedics & Traumatology, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong SAR, PR China; Lui Che Woo Institute of Innovative Medicine, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, PR China; Stem Cells and Regenerative Medicine Laboratory, Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Hong Kong SAR, PR China; Key Laboratory for Regenerative Medicine, Ministry of Education, School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong SAR, PR China
| | - Jin-Fang Zhang
- Department of Orthopaedics & Traumatology, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong SAR, PR China; Lui Che Woo Institute of Innovative Medicine, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, PR China; The Chinese University of Hong Kong, Shenzhen Research Institute, Shenzhen, PR China.
| | - Gang Li
- Department of Orthopaedics & Traumatology, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong SAR, PR China; Lui Che Woo Institute of Innovative Medicine, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, PR China; Stem Cells and Regenerative Medicine Laboratory, Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Hong Kong SAR, PR China; Key Laboratory for Regenerative Medicine, Ministry of Education, School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong SAR, PR China; The Chinese University of Hong Kong, Shenzhen Research Institute, Shenzhen, PR China.
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Augusto LMM, Aguiar DP, Bonfim DC, Dos Santos Cavalcanti A, Casado PL, Duarte MEL. Mesenchymal stromal cells from bone marrow treated with bovine tendon extract acquire the phenotype of mature tenocytes. Rev Bras Ortop 2016; 51:70-4. [PMID: 26962503 PMCID: PMC4767843 DOI: 10.1016/j.rboe.2015.12.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2014] [Accepted: 02/03/2015] [Indexed: 11/16/2022] Open
Abstract
Objective This study evaluated in vitro differentiation of mesenchymal stromal cells isolated from bone marrow, in tenocytes after treatment with bovine tendon extract. Methods Bovine tendons were used for preparation of the extract and were stored at −80 °C. Mesenchymal stromal cells from the bone marrow of three donors were used for cytotoxicity tests by means of MTT and cell differentiation by means of qPCR. Results The data showed that mesenchymal stromal cells from bone marrow treated for up to 21 days in the presence of bovine tendon extract diluted at diminishing concentrations (1:10, 1:50 and 1:250) promoted activation of biglycan, collagen type I and fibromodulin expression. Conclusion Our results show that bovine tendon extract is capable of promoting differentiation of bone marrow stromal cells in tenocytes.
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Augusto LMM, Aguiar DP, Bonfim DC, Cavalcanti ADS, Casado PL, Duarte MEL. Células mesenquimais do estroma da medula óssea tratadas com extrato de tendão bovino adquirem o fenótipo de tenócitos maduros. Rev Bras Ortop 2016. [DOI: 10.1016/j.rbo.2015.02.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Tenogenic differentiation of mesenchymal stem cells and noncoding RNA: From bench to bedside. Exp Cell Res 2015; 341:237-42. [PMID: 26724570 DOI: 10.1016/j.yexcr.2015.12.014] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2015] [Revised: 12/21/2015] [Accepted: 12/23/2015] [Indexed: 11/21/2022]
Abstract
Tendon is a critical unit of musculoskeletal system that connects muscle to bone to control bone movement. More population participate in physical activities, tendon injuries, such as acute tendon rupture and tendinopathy due to overuse, are common causing unbearable pain and disability. However, the process of tendon development and the pathogenesis of tendinopathy are not well defined, limiting the development of clinical therapy for tendon injuries. Studying the tendon differentiation control pathways may help to develop novel therapeutic strategies. This review summarized the novel molecular and cellular events in tendon development and highlighted the clinical application potential of non-coding RNAs and tendon-derived stem cells in gene and cell therapy for tendon injuries, which may bring insights into research and new therapy for tendon disorders.
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Liu H, Zhang C, Zhu S, Lu P, Zhu T, Gong X, Zhang Z, Hu J, Yin Z, Heng BC, Chen X, Ouyang HW. Mohawk promotes the tenogenesis of mesenchymal stem cells through activation of the TGFβ signaling pathway. Stem Cells 2015; 33:443-55. [PMID: 25332192 DOI: 10.1002/stem.1866] [Citation(s) in RCA: 118] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2014] [Revised: 09/09/2014] [Accepted: 09/18/2014] [Indexed: 12/14/2022]
Abstract
The transcription factor Mohawk (Mkx) is expressed in developing tendons and is an important regulator of tenogenic differentiation. However, the exact roles of Mkx in tendinopathy and tendon repair remain unclear. Using gene expression Omnibus datasets and immunofluorescence assays, we found that Mkx expression level was dramatically lower in human tendinopathy tissue and it is activated at specific stages of tendon development. In mesenchymal stem cells (MSCs), ectopic Mkx expression strikingly promoted tenogenesis more efficiently than Scleraxis (Scx), a well-known master transcription factor of tendon. Significantly higher levels of tenogenic gene expression and collagen fibril growth were observed with Mkx versus Scx. Interestingly, it was observed that Mkx dramatically upregulated Scx through binding to the Tgfb2 promoter. Additionally, the transplantation of Mkx-expressing-MSC sheets promoted tendon repair in a mouse model of Achilles-tendon defect. Taken together, these data shed light on previously unrecognized roles of Mkx in tendinopathy, tenogenesis, and tendon repair as well as in regulating the TGFβ pathway.
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Affiliation(s)
- Huanhuan Liu
- Center for Stem Cell and Tissue Engineering, School of Medicine, Zhejiang University, Hangzhou, People's Republic of China; Zhejiang Provincial Key Laboratory of Tissue Engineering and Regenerative Medicine, Hangzhou, People's Republic of China
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Gaut L, Duprez D. Tendon development and diseases. WILEY INTERDISCIPLINARY REVIEWS-DEVELOPMENTAL BIOLOGY 2015; 5:5-23. [PMID: 26256998 DOI: 10.1002/wdev.201] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2015] [Revised: 06/15/2015] [Accepted: 06/20/2015] [Indexed: 12/22/2022]
Abstract
Tendon is a uniaxial connective tissue component of the musculoskeletal system. Tendon is involved in force transmission between muscle and bone. Tendon injury is very common and debilitating but tendon repair remains a clinical challenge for orthopedic medicine. In vertebrates, tendon is mainly composed of type I collagen fibrils, displaying a parallel organization along the tendon axis. The tendon-specific spatial organization of type I collagen provides the mechanical properties for tendon function. In contrast to other components of the musculoskeletal system, tendon biology is poorly understood. An important goal in tendon biology is to understand the mechanisms involved in the production and assembly of type I collagen fibrils during development, postnatal formation, and healing processes in order to design new therapies for tendon repair. In this review we highlight the current understanding of the molecular and mechanical signals known to be involved in tenogenesis during development, and how development provides insights into tendon healing processes. WIREs Dev Biol 2016, 5:5-23. doi: 10.1002/wdev.201 For further resources related to this article, please visit the WIREs website.
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Affiliation(s)
- Ludovic Gaut
- CNRS UMR 7622, IBPS-Developmental Biology Laboratory, Paris, France.,Sorbonne Universités, UPMC Univ Paris 06, IBPS-Developmental Biology Laboratory, Paris, France.,Inserm U1156, Paris, France
| | - Delphine Duprez
- CNRS UMR 7622, IBPS-Developmental Biology Laboratory, Paris, France.,Sorbonne Universités, UPMC Univ Paris 06, IBPS-Developmental Biology Laboratory, Paris, France.,Inserm U1156, Paris, France
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Chen W, Tang H, Zhou M, Hu C, Zhang J, Tang K. Dexamethasone inhibits the differentiation of rat tendon stem cells into tenocytes by targeting the scleraxis gene. J Steroid Biochem Mol Biol 2015; 152:16-24. [PMID: 25906952 DOI: 10.1016/j.jsbmb.2015.04.010] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/06/2015] [Revised: 03/24/2015] [Accepted: 04/08/2015] [Indexed: 11/27/2022]
Abstract
Glucocorticoid-induced tendon rupture is very common in clinical practice, and the overall outcome of surgical suture repair is rather poor. The mechanism remains unclear, and effective treatments are still lacking. In the present study, we investigated the effect of dexamethasone on the differentiation of rat tendon stem cells (TSCs) to tenocytes and the underlying molecular mechanisms and found that dexamethasone inhibits the differentiation of TSCs to tenocytes by analyzing the development of long, spindle-shaped cells and detecting the expression of tenocyte markers type I collagen and tenomodulin (TNMD) at both the mRNA and protein levels. We also discovered that after treatment with dexamethasone, the scleraxis expression level is downregulated in vitro and in human specimen. Chromatin immunoprecipitation (ChIP)-PCR showed that dexamethasone promotes glucocorticoid receptor interacted with the TGGAAGCC sequence located between -734 and -726 base pairs (bp) upstream of the start codon of the scleraxis gene. Furthermore, TSCs were transfected with scleraxis knockdown or overexpression plasmids, and the results indicated that scleraxis plays a pivotal role in the differentiation of TSCs to tenocytes. In conclusion, dexamethasone inhibits the differentiation of TSCs to tenocytes by inhibiting the scleraxis gene.
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Affiliation(s)
- Wan Chen
- Department of Orthopedic Surgery, Southwest Hospital, Third Military Medical University, Chongqing 400038, China
| | - Hong Tang
- Department of Orthopedic Surgery, Southwest Hospital, Third Military Medical University, Chongqing 400038, China
| | - Mei Zhou
- Department of Orthopedic Surgery, Southwest Hospital, Third Military Medical University, Chongqing 400038, China
| | - Chao Hu
- Department of Orthopedic Surgery, Southwest Hospital, Third Military Medical University, Chongqing 400038, China
| | - Jiqiang Zhang
- Department of Neurology, Third Military Medical University, Chongqing 400038, China.
| | - Kanglai Tang
- Department of Orthopedic Surgery, Southwest Hospital, Third Military Medical University, Chongqing 400038, China.
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Wang A, Mackie K, Breidahl W, Wang T, Zheng MH. Evidence for the Durability of Autologous Tenocyte Injection for Treatment of Chronic Resistant Lateral Epicondylitis: Mean 4.5-Year Clinical Follow-up. Am J Sports Med 2015; 43:1775-83. [PMID: 25908113 DOI: 10.1177/0363546515579185] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
BACKGROUND Chronic lateral epicondylitis (LE) induces cell apoptosis and autophagy, which lead to the reduction of tendon-derived cells in the torn tendon. Our previous study has shown that ultrasound-guided autologous tenocyte injection (ATI) to the torn tendon in patients with chronic resistant LE significantly improves pain, function, and structural repair at 1 year. This report is the continued assessment of the clinical outcomes of these patients at mean 4.5-year follow-up. HYPOTHESIS Improvements in LE clinical function and structural repair after ATI will be maintained at mean 4.5-year follow-up. STUDY DESIGN Case series; Level of evidence, 4. METHODS Patients with severe refractory LE underwent clinical evaluation and MRI before intervention. A patellar tendon needle biopsy was performed under local anesthetic, and tendon cells were expanded by in vitro culture. Autologous tenocytes were injected into the central tendinopathy identified at the common extensor tendon origin under ultrasound guidance on a single occasion. Patients underwent serial clinical evaluations for up to 5 years after ATI, including the visual analog scale (VAS) for pain, Quick Disabilities of the Arm, Shoulder and Hand (QuickDASH), Upper Extremity Functional Scale (UEFS), and grip strength. Post-ATI MRI scanning was performed at 1 year and final follow-up. RESULTS A total of 16 patients (9 male, 7 female), aged between 37 and 63 years, were included in the study. The mean duration of symptoms before study recruitment was 29.24 months (range, 6-240 months). One patient elected to proceed to surgery 3 months after ATI due to reinjury at work, and 1 patient died of prostate cancer with metastases during the follow-up period. The mean final follow-up time for the remaining 15 patients was 4.51 years (range, 3.08-5.17 years). No complications were observed at the patellar tendon biopsy site for any patient. No adverse events, infection, or excessive fibroblastic reactions were observed in any patient at the injection site. Clinical evaluation revealed significant (P < .001) improvement in mean VAS pain score from 5.73 at initial assessment to 1.21 (78% improvement) at final follow-up. Mean QuickDASH, UEFS, and grip strength scores also significantly (P < .001) improved from initial assessment to final follow-up (from 45.88 to 6.61 [84%], from 31.73 to 9.20 [64%], and from 19.85 to 46.60 [208%], respectively). There was no difference in mean QuickDASH and UEFS scores at 1 year and final follow-up (P > .05); however, grip strength continued to improve (P < .001). A validated MRI scoring system indicated that the mean grade of tendinopathy at the common extensor origin improved significantly (P < .001) from initial assessment (4.31) to 1 year (2.88) and was maintained (P > .05) at final follow-up (2.87). At final follow-up, 93% of patients were either highly satisfied or satisfied with their ATI treatment. CONCLUSION ATI significantly improved clinical function and MRI tendinopathy scores for up to 5 years in patients with chronic resistant LE who had previously undergone unsuccessful nonsurgical treatment. This study provides evidence for the midterm durability of ATI for treatment of LE tendinopathy.
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Affiliation(s)
- Allan Wang
- Sir Charles Gairdner Hospital, Nedlands, Western Australia, Australia Centre for Orthopaedic Research, School of Surgery, The University of Western Australia, Crawley, Western Australia, Australia
| | - Katherine Mackie
- Centre for Orthopaedic Research, School of Surgery, The University of Western Australia, Crawley, Western Australia, Australia
| | - William Breidahl
- Centre for Musculoskeletal Studies, School of Surgery, The University of Western Australia, Crawley, Western Australia, Australia Perth Radiological Clinic, Subiaco, Western Australia, Australia
| | - Tao Wang
- Centre for Orthopaedic Research, School of Surgery, The University of Western Australia, Crawley, Western Australia, Australia
| | - Ming H Zheng
- Centre for Orthopaedic Research, School of Surgery, The University of Western Australia, Crawley, Western Australia, Australia
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Milet C, Duprez D. The Mkx homeoprotein promotes tenogenesis in stem cells and improves tendon repair. ANNALS OF TRANSLATIONAL MEDICINE 2015; 3:S33. [PMID: 26046080 DOI: 10.3978/j.issn.2305-5839.2015.03.64] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Subscribe] [Scholar Register] [Received: 02/18/2015] [Accepted: 02/20/2015] [Indexed: 12/27/2022]
Affiliation(s)
- Cécile Milet
- 1 CNRS UMR 7622, IBPS-Developmental Biology Laboratory, F-75005, Paris, France ; 2 Sorbonne Universités, UPMC Univ Paris 06, IBPS-Developmental Biology Laboratory, F-75005, Paris, France ; 3 Inserm U1156, F-75005, Paris, France
| | - Delphine Duprez
- 1 CNRS UMR 7622, IBPS-Developmental Biology Laboratory, F-75005, Paris, France ; 2 Sorbonne Universités, UPMC Univ Paris 06, IBPS-Developmental Biology Laboratory, F-75005, Paris, France ; 3 Inserm U1156, F-75005, Paris, France
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Markers for the identification of tendon-derived stem cells in vitro and tendon stem cells in situ - update and future development. Stem Cell Res Ther 2015; 6:106. [PMID: 26031740 PMCID: PMC4451873 DOI: 10.1186/s13287-015-0097-y] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
The efficacy of tendon-derived stem cells (TDSCs) for the promotion of tendon and tendon-bone junction repair has been reported in animal studies. Modulation of the tendon stem cell niche in vivo has also been reported to influence tendon structure. There is a need to have specific and reliable markers that can define TDSCs in vitro and tendon stem cells in situ for several reasons: to understand the basic biology of TDSCs and their subpopulations in vitro; to understand the identity, niches and functions of tendon/progenitor stem cells in vivo; to meet the governmental regulatory requirements for quality of TDSCs when translating the exciting preclinical findings into clinical trial/practice; and to develop new treatment strategies for mobilizing endogenous stem/progenitor cells in tendon. TDSCs were reported to express the common mesenchymal stem cell (MSC) markers and some embryonic stem cell (ESC) markers, and there were attempts to use these markers to label tendon stem cells in situ. Are these stem cell markers useful for the identification of TDSCs in vitro and tracking of tendon stem cells in situ? This review aims to discuss the values of the panel of MSC, ESC and tendon-related markers for the identification of TDSCs in vitro. Important factors influencing marker expression by TDSCs are discussed. The usefulness and limitations of the panel of MSC, ESC and tendon-related markers for tracking stem cells in tendon, especially tendon stem cells, in situ are then reviewed. Future research directions are proposed.
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Loiselle AE, Yukata K, Geary MB, Kondabolu S, Shi S, Jonason JH, Awad HA, O’Keefe RJ. Development of antisense oligonucleotide (ASO) technology against Tgf-β signaling to prevent scarring during flexor tendon repair. J Orthop Res 2015; 33:859-66. [PMID: 25761254 PMCID: PMC4416995 DOI: 10.1002/jor.22890] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/14/2014] [Accepted: 03/01/2015] [Indexed: 02/04/2023]
Abstract
Flexor tendons (FT) in the hand provide near frictionless gliding to facilitate hand function. Upon injury and surgical repair, satisfactory healing is hampered by fibrous adhesions between the tendon and synovial sheath. In the present study we used antisense oligonucleotides (ASOs), specifically targeted to components of Tgf-β signaling, including Tgf-β1, Smad3 and Ctgf, to test the hypothesis that local delivery of ASOs and suppression of Tgf-β1 signaling would enhance murine FT healing by suppressing adhesion formation while maintaining strength. ASOs were injected in to the FT repair site at 2, 6 and 12 days post-surgery. ASO treatment suppressed target gene expression through 21 days. Treatment with Tgf-β1, Smad3 or Ctgf ASOs resulted in significant improvement in tendon gliding function at 14 and 21 days, relative to control. Consistent with a decrease in adhesions, Col3a1 expression was significantly decreased in Tgf-β1, Smad3 and Ctgf ASO treated tendons relative to control. Smad3 ASO treatment enhanced the maximum load at failure of healing tendons at 14 days, relative to control. Taken together, these data support the use of ASO treatment to improve FT repair, and suggest that modulation of the Tgf-β1 signaling pathway can reduce adhesions while maintaining the strength of the repair.
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Affiliation(s)
- Alayna E. Loiselle
- Center for Musculoskeletal Research, Department of Orthopaedics, University of Rochester Medical Center, Rochester, NY 14642
| | - Kiminori Yukata
- Center for Musculoskeletal Research, Department of Orthopaedics, University of Rochester Medical Center, Rochester, NY 14642
| | - Michael B. Geary
- Center for Musculoskeletal Research, Department of Orthopaedics, University of Rochester Medical Center, Rochester, NY 14642
| | - Sirish Kondabolu
- Center for Musculoskeletal Research, Department of Orthopaedics, University of Rochester Medical Center, Rochester, NY 14642
| | - Shanshan Shi
- Center for Musculoskeletal Research, Department of Orthopaedics, University of Rochester Medical Center, Rochester, NY 14642
| | - Jennifer H. Jonason
- Center for Musculoskeletal Research, Department of Orthopaedics, University of Rochester Medical Center, Rochester, NY 14642
| | - Hani A. Awad
- Center for Musculoskeletal Research, Department of Orthopaedics, University of Rochester Medical Center, Rochester, NY 14642,Department of Biomedical Engineering, University of Rochester, Rochester, NY, 14627
| | - Regis J. O’Keefe
- Center for Musculoskeletal Research, Department of Orthopaedics, University of Rochester Medical Center, Rochester, NY 14642,Department of Orthopaedic Surgery, Washington University in St. Louis School of Medicine, St. Louis, Missouri 63110,Corresponding Author: Regis O’Keefe, Department of Orthopaedic Surgery, Washington University in St. Louis School of Medicine, 660 South Euclid Ave., St. Louis, MO 63110-1093,
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80
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Huang AH, Lu HH, Schweitzer R. Molecular regulation of tendon cell fate during development. J Orthop Res 2015; 33:800-12. [PMID: 25664867 DOI: 10.1002/jor.22834] [Citation(s) in RCA: 86] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/10/2014] [Accepted: 01/16/2015] [Indexed: 02/04/2023]
Abstract
Although there have been several advances identifying novel mediators of tendon induction, differentiation, and patterning, much of the basic landscape of tendon biology from developmental stages onward remain almost completely undefined. During the New Frontiers in Tendon Research meeting, a group of developmental biologists with expertise across musculoskeletal disciplines identified key challenges for the tendon development field. The tools generated and the molecular regulators identified in developmental research have enhanced mechanistic studies in tendon injury and repair, both by defining benchmarks for success, as well as informing regenerative strategies. To address the needs of the orthopedic research community, this review will therefore focus on three key areas in tendon development that may have critical implications for the fields of tendon repair/regeneration and tendon tissue engineering, including functional markers of tendon cell identity, signaling regulators of tendon induction and differentiation, and in vitro culture models for tendon cell differentiation. Our goal is to provide a useful list of the currently known molecular players and their function in tendon differentiation within the context of development.
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Affiliation(s)
- Alice H Huang
- Department of Orthopaedics, Icahn School of Medicine at Mount Sinai, New York, NY
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81
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Youngstrom DW, Rajpar I, Kaplan DL, Barrett JG. A bioreactor system for in vitro tendon differentiation and tendon tissue engineering. J Orthop Res 2015; 33:911-8. [PMID: 25664422 PMCID: PMC5098427 DOI: 10.1002/jor.22848] [Citation(s) in RCA: 68] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/09/2014] [Accepted: 01/27/2015] [Indexed: 02/04/2023]
Abstract
There is significant clinical demand for functional tendon grafts in human and veterinary medicine. Tissue engineering techniques combining cells, scaffolds, and environmental stimuli may circumvent the shortcomings of traditional transplantation processes. In this study, the influence of cyclic mechanical stimulation on graft maturation and cellular phenotype was assessed in an equine model. Decellularized tendon scaffolds from four equine sources were seeded with syngeneic bone marrow-derived mesenchymal stem cells and subjected to 0%, 3%, or 5% strain at 0.33 Hz for up to 1 h daily for 11 days. Cells cultured at 3% strain integrated deep into their scaffolds, altered extracellular matrix composition, adopted tendon-like gene expression profiles, and increased construct elastic modulus and ultimate tensile strength to native levels. This bioreactor protocol is therefore suitable for cultivating replacement tendon material or as an in vitro model for studying differentiation of stem cells toward tendon.
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Affiliation(s)
- Daniel W. Youngstrom
- Program in Biomedical and Veterinary Sciences, Marion duPont Scott Equine Medical Center, Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Leesburg, Virginia, United States of America
| | - Ibtesam Rajpar
- Program in Biomedical and Veterinary Sciences, Marion duPont Scott Equine Medical Center, Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Leesburg, Virginia, United States of America
| | - David L. Kaplan
- Department of Biomedical Engineering, Tissue Engineering Resource Center, Tufts University, Medford, Massachusetts, United States of America
| | - Jennifer G. Barrett
- Department of Large Animal Clinical Sciences, Marion duPont Scott Equine Medical Center, Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Leesburg, Virginia, United States of America
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82
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Abstract
Tendon injuries are common and present a clinical challenge to orthopedic surgery mainly because these injuries often respond poorly to treatment and require prolonged rehabilitation. Therapeutic options used to repair ruptured tendons have consisted of suture, autografts, allografts, and synthetic prostheses. To date, none of these alternatives has provided a successful long-term solution, and often the restored tendons do not recover their complete strength and functionality. Unfortunately, our understanding of tendon biology lags far behind that of other musculoskeletal tissues, thus impeding the development of new treatment options for tendon conditions. Hence, in this review, after introducing the clinical significance of tendon diseases and the present understanding of tendon biology, we describe and critically assess the current strategies for enhancing tendon repair by biological means. These consist mainly of applying growth factors, stem cells, natural biomaterials and genes, alone or in combination, to the site of tendon damage. A deeper understanding of how tendon tissue and cells operate, combined with practical applications of modern molecular and cellular tools could provide the long awaited breakthrough in designing effective tendon-specific therapeutics and overall improvement of tendon disease management.
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83
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Gaspar D, Spanoudes K, Holladay C, Pandit A, Zeugolis D. Progress in cell-based therapies for tendon repair. Adv Drug Deliv Rev 2015; 84:240-56. [PMID: 25543005 DOI: 10.1016/j.addr.2014.11.023] [Citation(s) in RCA: 123] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2014] [Revised: 11/08/2014] [Accepted: 11/12/2014] [Indexed: 02/07/2023]
Abstract
The last decade has seen significant developments in cell therapies, based on permanently differentiated, reprogrammed or engineered stem cells, for tendon injuries and degenerative conditions. In vitro studies assess the influence of biophysical, biochemical and biological signals on tenogenic phenotype maintenance and/or differentiation towards tenogenic lineage. However, the ideal culture environment has yet to be identified due to the lack of standardised experimental setup and readout system. Bone marrow mesenchymal stem cells and tenocytes/dermal fibroblasts appear to be the cell populations of choice for clinical translation in equine and human patients respectively based on circumstantial, rather than on hard evidence. Collaborative, inter- and multi-disciplinary efforts are expected to provide clinically relevant and commercially viable cell-based therapies for tendon repair and regeneration in the years to come.
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Affiliation(s)
- Diana Gaspar
- Network of Excellence for Functional Biomaterials (NFB), National University of Ireland, Galway (NUI Galway), Galway, Ireland
| | - Kyriakos Spanoudes
- Network of Excellence for Functional Biomaterials (NFB), National University of Ireland, Galway (NUI Galway), Galway, Ireland
| | - Carolyn Holladay
- Network of Excellence for Functional Biomaterials (NFB), National University of Ireland, Galway (NUI Galway), Galway, Ireland
| | - Abhay Pandit
- Network of Excellence for Functional Biomaterials (NFB), National University of Ireland, Galway (NUI Galway), Galway, Ireland
| | - Dimitrios Zeugolis
- Network of Excellence for Functional Biomaterials (NFB), National University of Ireland, Galway (NUI Galway), Galway, Ireland.
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84
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Abstract
Injuries to the musculoskeletal system are common, debilitating and expensive. In many cases, healing is imperfect, which leads to chronic impairment. Gene transfer might improve repair and regeneration at sites of injury by enabling the local, sustained and potentially regulated expression of therapeutic gene products; such products include morphogens, growth factors and anti-inflammatory agents. Proteins produced endogenously as a result of gene transfer are nascent molecules that have undergone post-translational modification. In addition, gene transfer offers particular advantages for the delivery of products with an intracellular site of action, such as transcription factors and noncoding RNAs, and proteins that need to be inserted into a cell compartment, such as a membrane. Transgenes can be delivered by viral or nonviral vectors via in vivo or ex vivo protocols using progenitor or differentiated cells. The first gene transfer clinical trials for osteoarthritis and cartilage repair have already been completed. Various bone-healing protocols are at an advanced stage of development, including studies with large animals that could lead to human trials. Other applications in the repair and regeneration of skeletal muscle, intervertebral disc, meniscus, ligament and tendon are in preclinical development. In addition to scientific, medical and safety considerations, clinical translation is constrained by social, financial and logistical issues.
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85
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Mechanical stimulation of human tendon stem/progenitor cells results in upregulation of matrix proteins, integrins and MMPs, and activation of p38 and ERK1/2 kinases. BMC Mol Biol 2015; 16:6. [PMID: 25880261 PMCID: PMC4373449 DOI: 10.1186/s12867-015-0036-6] [Citation(s) in RCA: 66] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2014] [Accepted: 02/24/2015] [Indexed: 01/07/2023] Open
Abstract
Background Tendons are dense connective tissues subjected periodically to mechanical stress upon which complex responsive mechanisms are activated. These mechanisms affect not only the development of these tissues but also their healing. Despite of the acknowledged importance of the mechanical stress for tendon function and repair, the mechanotransduction mechanisms in tendon cells are still unclear and the elucidation of these mechanisms is a key goal in tendon research. Tendon stem/progenitor cells (TSPC) possess common adult stem cell characteristics, and are suggested to actively participate in tendon development, tissue homeostasis as well as repair. This makes them an important cell population for tendon repair, and also an interesting research target for various open questions in tendon cell biology. Therefore, in our study we focused on TSPC, subjected them to five different mechanical protocols, and investigated the gene expression changes by using semi-quantitative, quantitative PCR and western blotting technologies. Results Among the 25 different genes analyzed, we can convincingly report that the tendon-related genes - fibromodulin, lumican and versican, the collagen I-binding integrins - α1, α2 and α11, the matrix metalloproteinases - MMP9, 13 and 14 were strongly upregulated in TSPC after 3 days of mechanical stimulation with 8% amplitude. Molecular signaling analyses of five key integrin downstream kinases suggested that mechanical stimuli are mediated through ERK1/2 and p38, which were significantly activated in 8% biaxial-loaded TSPC. Conclusions Our results demonstrate the positive effect of 8% mechanical loading on the gene expression of matrix proteins, integrins and matrix metalloproteinases, and activation of integrin downstream kinases p38 and ERK1/2 in TSPC. Taken together, our study contributes to better understanding of mechanotransduction mechanisms in TPSC, which in long term, after further translational research between tendon cell biology and orthopedics, can be beneficial to the management of tendon repair. Electronic supplementary material The online version of this article (doi:10.1186/s12867-015-0036-6) contains supplementary material, which is available to authorized users.
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86
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Abstract
Tendon is a crucial component of the musculoskeletal system. Tendons connect muscle to bone and transmit forces to produce motion. Chronic and acute tendon injuries are very common and result in considerable pain and disability. The management of tendon injuries remains a challenge for clinicians. Effective treatments for tendon injuries are lacking because the understanding of tendon biology lags behind that of the other components of the musculoskeletal system. Animal and cellular models have been developed to study tendon-cell differentiation and tendon repair following injury. These studies have highlighted specific growth factors and transcription factors involved in tenogenesis during developmental and repair processes. Mechanical factors also seem to be essential for tendon development, homeostasis and repair. Mechanical signals are transduced via molecular signalling pathways that trigger adaptive responses in the tendon. Understanding the links between the mechanical and biological parameters involved in tendon development, homeostasis and repair is prerequisite for the identification of effective treatments for chronic and acute tendon injuries.
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Affiliation(s)
- Geoffroy Nourissat
- Service de chirurgie orthopédique et traumatologique, INSERM UMR_S938, DHU i2B, Assistance Publique-Hopitaux de Paris, Hôpital Saint-Antoine, 184 rue du Faubourg Saint-Antoine, Paris 75012, France
| | - Francis Berenbaum
- Service de rhumatologie, INSERM UMR_S938, DHU i2B, Assistance Publique-Hopitaux de Paris, Hôpital Saint-Antoine, 184 rue du Faubourg Saint-Antoine, Paris 75012, France
| | - Delphine Duprez
- Centre national de la recherche scientifique UMR 7622, IBPS Developmental Biology Laboratory, F-75005, Paris 5005, France
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87
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Otabe K, Nakahara H, Hasegawa A, Matsukawa T, Ayabe F, Onizuka N, Inui M, Takada S, Ito Y, Sekiya I, Muneta T, Lotz M, Asahara H. Transcription factor Mohawk controls tenogenic differentiation of bone marrow mesenchymal stem cells in vitro and in vivo. J Orthop Res 2015; 33:1-8. [PMID: 25312837 PMCID: PMC4294629 DOI: 10.1002/jor.22750] [Citation(s) in RCA: 72] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Mohawk homeobox (MKX) has been demonstrated as a tendon/ligament specific transcription factor. The aim of this study was to investigate the role of MKX in ligament/tenogenic differentiation of bone marrow derived mesenchymal stem cells (BMMSCs). Human BMMSCs were treated with 50 ng/ml BMP-12 or transduced with MKX or scleraxis (SCX) adenoviral vector. Gene expression analysis was performed by quantitative reverse transcribed polymerase chain reaction (qRT-PCR). Rat BMMSCs were seeded in a collagen scaffold and transplanted into a rat Achilles tendon defect model. Tenogenesis related gene expressions and histological features were analyzed. BMP-12 induced tenogenesis in BMMSCs as indicated by increased COL1a1, TNXB, DCN and SCX mRNA, and MKX expression increased simultaneously. Rat BMMSCs enhanced defect repair and were still detectable 3 weeks after transplantation. Increased expressions of COL1a1, TNC and TNMD in vivo were also correlated with upregulated MKX. Adenoviral MKX promoted expression of COL1a1, TNXB, and TNMD in BMMSCs. This study demonstrated that MKX gene expression is enhanced during the tenogenic differentiation of BMMSCs in vitro and in vivo, and the adenoviral overexpression of MKX increases tendon extracellular matrix gene expression and protein production. Thus, MKX is a key factor for tenogenic differentiation of MSCs.
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Affiliation(s)
- Koji Otabe
- The Scripps Research Institute, Department of Molecular and Experimental Medicine, La Jolla, California, USA
,National Research Institute for Child Health and Development, Department of System Biomedicine, Tokyo, Japan
,Tokyo Medical and Dental University, Center for Stem Cell and Regenerative Medicine, Tokyo, Japan
| | - Hiroyuki Nakahara
- The Scripps Research Institute, Department of Molecular and Experimental Medicine, La Jolla, California, USA
| | - Akihiko Hasegawa
- The Scripps Research Institute, Department of Molecular and Experimental Medicine, La Jolla, California, USA
| | - Tetsuya Matsukawa
- The Scripps Research Institute, Department of Molecular and Experimental Medicine, La Jolla, California, USA
| | - Fumiaki Ayabe
- The Scripps Research Institute, Department of Molecular and Experimental Medicine, La Jolla, California, USA
| | - Naoko Onizuka
- National Research Institute for Child Health and Development, Department of System Biomedicine, Tokyo, Japan
| | - Masafumi Inui
- National Research Institute for Child Health and Development, Department of System Biomedicine, Tokyo, Japan
| | - Shuji Takada
- National Research Institute for Child Health and Development, Department of System Biomedicine, Tokyo, Japan
| | - Yoshiaki Ito
- Tokyo Medical and Dental University, Department of System Biomedicine, Graduate School, Tokyo, Japan
| | - Ichiro Sekiya
- Tokyo Medical and Dental University, Center for Stem Cell and Regenerative Medicine, Tokyo, Japan
| | - Takeshi Muneta
- Tokyo Medical and Dental University, Department of Orthopedic Surgery and Sports Medicine, Graduate School, Tokyo, Japan
| | - Martin Lotz
- The Scripps Research Institute, Department of Molecular and Experimental Medicine, La Jolla, California, USA
| | - Hiroshi Asahara
- The Scripps Research Institute, Department of Molecular and Experimental Medicine, La Jolla, California, USA
,National Research Institute for Child Health and Development, Department of System Biomedicine, Tokyo, Japan
,Tokyo Medical and Dental University, Department of System Biomedicine, Graduate School, Tokyo, Japan
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88
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Chen JL, Zhang W, Liu ZY, Heng BC, Ouyang HW, Dai XS. Physical regulation of stem cells differentiation into teno-lineage: current strategies and future direction. Cell Tissue Res 2014; 360:195-207. [DOI: 10.1007/s00441-014-2077-4] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2014] [Accepted: 11/17/2014] [Indexed: 12/18/2022]
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89
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Russo V, Mauro A, Martelli A, Di Giacinto O, Di Marcantonio L, Nardinocchi D, Berardinelli P, Barboni B. Cellular and molecular maturation in fetal and adult ovine calcaneal tendons. J Anat 2014; 226:126-42. [PMID: 25546075 PMCID: PMC4304568 DOI: 10.1111/joa.12269] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/07/2014] [Indexed: 02/06/2023] Open
Abstract
Processes of development during fetal life profoundly transform tendons from a plastic tissue into a highly differentiated structure, characterised by a very low ability to regenerate after injury in adulthood. Sheep tendon is frequently used as a translational model to investigate cell-based regenerative approaches. However, in contrast to other species, analytical and comparative baseline studies on the normal developmental maturation of sheep tendons from fetal through to adult life are not currently available. Thus, a detailed morphological and biochemical study was designed to characterise tissue maturation during mid- (2 months of pregnancy: 14 cm of length) and late fetal (4 months: 40 cm of length) life, through to adulthood. The results confirm that ovine tendon morphology undergoes profound transformations during this period. Endotenon was more developed in fetal tendons than in adult tissues, and its cell phenotype changed through tendon maturation. Indeed, groups of large rounded cells laying on smaller and more compacted ones expressing osteocalcin, vascular endothelial growth factor (VEGF) and nerve growth factor (NGF) were identified exclusively in fetal mid-stage tissues, and not in late fetal or adult tendons. VEGF, NGF as well as blood vessels and nerve fibers showed decreased expression during tendon development. Moreover, the endotenon of mid- and late fetuses contained identifiable cells that expressed several pluripotent stem cell markers [Telomerase Reverse Transcriptase (TERT), SRY Determining Region Y Box-2 (SOX2), Nanog Homeobox (NANOG) and Octamer Binding Transcription Factor-4A (OCT-4A)]. These cells were not identifiable in adult specimens. Ovine tendon development was also accompanied by morphological modifications to cell nuclei, and a progressive decrease in cellularity, proliferation index and expression of connexins 43 and 32. Tendon maturation was similarly characterised by modulation of several other gene expression profiles, including Collagen type I, Collagen type III, Scleraxis B, Tenomodulin, Trombospondin 4 and Osteocalcin. These gene profiles underwent a dramatic reduction in adult tissues. Transforming growth factor-1 expression (involved in collagen synthesis) underwent a similar decrease. In conclusion, these morphological studies carried out on sheep tendons at different stages of development and aging offer normal structural and molecular baseline data to allow accurate evaluation of data from subsequent interventional studies investigating tendon healing and regeneration in ovine experimental models.
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90
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Alberton P, Dex S, Popov C, Shukunami C, Schieker M, Docheva D. Loss of tenomodulin results in reduced self-renewal and augmented senescence of tendon stem/progenitor cells. Stem Cells Dev 2014; 24:597-609. [PMID: 25351164 PMCID: PMC4333258 DOI: 10.1089/scd.2014.0314] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Tenomodulin (Tnmd) is a well-known gene marker for the tendon and ligament lineage, but its exact functions in these tissues still remain elusive. In this study, we investigated Tnmd loss of function in mouse tendon stem/progenitor cells (mTSPC) by implicating a previously established Tnmd knockout (KO) mouse model. mTSPC were isolated from control and Tnmd KO tail tendons and their stemness features, such as gene marker profile, multipotential, and self-renewal, were compared. Immunofluorescence and reverse transcriptase-polymerase chain reaction analyses for stem cell-, tenogenic-, osteogenic-, and chondrogenic-related genes confirmed their stemness and lineage specificity and demonstrated no profound differences between the two genotypes. Multipotential was not significantly affected since both cell types differentiated successfully into adipogenic, osteogenic, and chondrogenic lineages. In contrast, self-renewal assays validated that Tnmd KO TSPC exhibit significantly reduced proliferative potential, which was also reflected in lower Cyclin D1 levels. When analyzing possible cellular mechanisms behind the observed decreased self-renewability of Tnmd KO TSPC, we found that cellular senescence plays a major role, starting earlier and cumulating more in Tnmd KO compared with control TSPC. This was accompanied with augmented expression of the cell cycle inhibitor p53. Finally, the proliferative effect of Tnmd in TSPC was confirmed with transient transfection of Tnmd cDNA into Tnmd KO TSPC, which rescued their proliferative deficit. Taken together, we can report that loss of Tnmd affects significantly the self-renewal and senescence properties, but not the multipotential of TSPC.
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Affiliation(s)
- Paolo Alberton
- 1 Experimental Surgery and Regenerative Medicine, Department of Surgery, Ludwig-Maximilians-University (LMU) , Munich, Germany
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91
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Spanoudes K, Gaspar D, Pandit A, Zeugolis DI. The biophysical, biochemical, and biological toolbox for tenogenic phenotype maintenance in vitro. Trends Biotechnol 2014; 32:474-82. [PMID: 25043371 DOI: 10.1016/j.tibtech.2014.06.009] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2014] [Revised: 06/16/2014] [Accepted: 06/25/2014] [Indexed: 12/14/2022]
Abstract
Tendon injuries constitute an unmet clinical need, with 3 to 5 million new incidents occurring annually worldwide. Tissue grafting and biomaterial-based approaches fail to provide environments that are conducive to regeneration; instead they lead to nonspecific cell adhesion and scar tissue formation, which collectively impair functionality. Cell based therapies may potentially recover native tendon function, if tenocyte trans-differentiation can be evaded and stem cell differentiation towards tenogenic lineage is attained. To this end, recreating an artificial in vivo tendon niche by engineering functional in vitro microenvironments is a research priority. Clinically relevant cell based therapies for tendon repair and regeneration could be created using tools that harness biophysical beacons (surface topography, mechanical loading), biochemical cues (oxygen tension), and biological signals (growth factors).
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Affiliation(s)
- Kyriakos Spanoudes
- Network of Excellence for Functional Biomaterials (NFB), Biosciences Building, National University of Ireland Galway (NUI Galway), Galway, Ireland
| | - Diana Gaspar
- Network of Excellence for Functional Biomaterials (NFB), Biosciences Building, National University of Ireland Galway (NUI Galway), Galway, Ireland
| | - Abhay Pandit
- Network of Excellence for Functional Biomaterials (NFB), Biosciences Building, National University of Ireland Galway (NUI Galway), Galway, Ireland
| | - Dimitrios I Zeugolis
- Network of Excellence for Functional Biomaterials (NFB), Biosciences Building, National University of Ireland Galway (NUI Galway), Galway, Ireland.
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92
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Czubryt MP. A tale of 2 tissues: the overlapping role of scleraxis in tendons and the heart. Can J Physiol Pharmacol 2014; 92:707-12. [PMID: 25083735 DOI: 10.1139/cjpp-2013-0489] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Tissue integrity in the face of external physical forces requires the production of a strong extracellular matrix (ECM) composed primarily of the protein collagen. Tendons and the heart both withstand large and changing physical forces, and emerging evidence suggests that the transcription factor scleraxis plays a central role in responding to these forces by directly regulating the production of ECM components and (or) by determining the fate of matrix-producing cell types. Thus, despite the highly disparate inherent nature of these tissues, a common response mechanism may exist to govern the development, growth, and remodeling of the ECM in response to external force.
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Affiliation(s)
- Michael P Czubryt
- R4008 St. Boniface Research Centre, 351 Tache Avenue, University of Manitoba, Winnipeg, MB R2H 2A6, Canada
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93
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Guevara-Alvarez A, Schmitt A, Russell RP, Imhoff AB, Buchmann S. Growth factor delivery vehicles for tendon injuries: Mesenchymal stem cells and Platelet Rich Plasma. Muscles Ligaments Tendons J 2014; 4:378-385. [PMID: 25489557 PMCID: PMC4241431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
BACKGROUND tendon tissue shows limited regeneration potential with formation of scar tissue and inferior mechanical properties. The capacity of several growth factors to improve the healing response and decrease scar formation is described in different preclinical studies. Besides the application of isolated growth factors, current research focuses on two further strategies to improve the healing response in tendon injuries: platelet rich plasma (PRP) and mesenchymal stem cells (MSCs). OBJECTIVE the present review focuses on these two options and describes their potential to improve tendon healing. RESULTS in vitro experiments and animal studies showed promising results for the use of PRP, however clinical controlled studies have shown a tendency of reduced pain related symptoms but no significant differences in overall clinical scores. On the other hand MSCs are not totally arrived in clinical use so that there is still a lack of randomized controlled trials. In basic research experiments they show an extraordinary paracrine activity, anti-inflammatory effect and the possibility to differentiate in tenocytes when different activating-factors are added. CONCLUSION preclinical studies have shown promising results in improving tendon remodeling but the comparability of current literature is difficult due to different compositions. PRP and MSCs can act as efficient growth factor vehicles, however further studies should be performed in order to adequate investigate their clinical benefits in different tendon pathologies.
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Affiliation(s)
- Alberto Guevara-Alvarez
- Department of Orthopaedic Sport Medicine, Klinikumrechts der Isar, Technische Universität Mün-chen, Germany
| | - Andreas Schmitt
- Department of Orthopaedic Sport Medicine, Klinikumrechts der Isar, Technische Universität Mün-chen, Germany
| | - Ryan P. Russell
- Department of Reconstructive Sciences, University of Connecticut Health Center, Farmington, CT, USA
| | - Andreas B. Imhoff
- Department of Orthopaedic Sport Medicine, Klinikumrechts der Isar, Technische Universität Mün-chen, Germany
| | - Stefan Buchmann
- Department of Orthopaedic Sport Medicine, Klinikumrechts der Isar, Technische Universität Mün-chen, Germany
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94
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Tan C, Lui PPY, Lee YW, Wong YM. Scx-transduced tendon-derived stem cells (tdscs) promoted better tendon repair compared to mock-transduced cells in a rat patellar tendon window injury model. PLoS One 2014; 9:e97453. [PMID: 24831949 PMCID: PMC4022525 DOI: 10.1371/journal.pone.0097453] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2013] [Accepted: 04/21/2014] [Indexed: 02/06/2023] Open
Abstract
We hypothesized that the transplantation of Scx-transduced tendon-derived stem cells (TDSCs) promoted better tendon repair compared to the transplantation of mock-transduced cells. This study thus aimed to investigate the effect of Scx transduction on the expression of lineage markers in TDSCs and the effect of the resulting cell line in the promotion of tendon repair. Rat non-GFP or GFP-TDSCs were transduced with Scx or empty lentiviral vector (Mock) and selected by blasticidin. The mRNA expressions of Scx and different lineage markers were examined by qRT-PCR. The effect of the transplantation of GFP-TDSC-Scx on tendon repair was then tested in a rat unilateral patellar tendon window injury model. The transplantation of GFP-TDSC-Mock and scaffold-only served as controls. At week 2, 4 and 8 post-transplantation, the repaired patellar tendon was harvested for ex vivo fluorescent imaging, vivaCT imaging, histology, immunohistochemistry and biomechanical test. GFP-TDSC-Scx consistently showed higher expressions of most of tendon- and cartilage- related markers compared to the GFP-TDSC-Mock. However, the effect of Scx transduction on the expressions of bone-related markers was inconclusive. The transplanted GFP-TDSCs could be detected in the window wound at week 2 but not at week 4. Ectopic mineralization was detected in some samples at week 8 but there was no difference among different groups. The GFP-TDSC-Scx group only statistically significantly improved tendon repair histologically and biomechanically compared to the Scaffold-only group and the GFP-TDSC-Mock group at the early stage of tendon repair. There was significant higher expression of collagen type I in the window wound in the GFP-TDSC-Scx group compared to the other two groups at week 2. The transplantation of GFP-TDSC-Scx promoted healing at the early stage of tendon repair in a rat patellar tendon window injury model.
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Affiliation(s)
- Chunlai Tan
- Department of Orthopaedics and Traumatology, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China
- The Hong Kong Jockey Club Sports Medicine and Health Sciences Centre, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China
| | | | - Yuk Wa Lee
- Department of Orthopaedics and Traumatology, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China
- The Hong Kong Jockey Club Sports Medicine and Health Sciences Centre, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Yin Mei Wong
- Department of Orthopaedics and Traumatology, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China
- The Hong Kong Jockey Club Sports Medicine and Health Sciences Centre, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China
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95
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Miyabara S, Yuda Y, Kasashima Y, Kuwano A, Arai K. Regulation of Tenomodulin Expression Via Wnt/β-catenin Signaling in Equine Bone Marrow-derived Mesenchymal Stem Cells. J Equine Sci 2014; 25:7-13. [PMID: 24834008 PMCID: PMC4019198 DOI: 10.1294/jes.25.7] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2013] [Accepted: 01/30/2014] [Indexed: 01/06/2023] Open
Abstract
Tenomodulin has been recognized as a biomarker for tendon differentiation, and its gene expression is regulated by several
transcription factors including Scleraxis and Mohawk. In this study, we found a novel regulatory mechanism of tenomodulin
expression. Equine bone marrow-derived mesenchymal stem cells (BMSCs) in monolayer culture showed a low mRNA level of tenomodulin
in comparison with the level in the tendon. When cultured in collagen gel containing a glycogen synthase kinase-3 (GSK-3)
inhibitor (BIO), expression of tenomodulin in BMSCs increased up to the level in the tendon. Participation of GSK-3 in its gene
expression was further demonstrated by a gene silencing experiment with small interference RNA corresponding to GSK-3, suggesting
that Wnt/β-catenin signaling mediated expression of tenomodulin. These results were confirmed by nuclear translocation of
β-catenin in BIO-treated BMSCs cultured in collagen gel. Under this culture condition, expression of tenomodulin-related
transcription factors including Scleraxis and Mohawk was not affected, suggesting that Wnt/β-catenin signaling was independent
from these transcription factors. Additionally, BIO strongly enhanced expression of type XIV collagen in collagen-embedded BMSCs
up to the level in the tendon, and other tendon-related extracellular matrix components such as decorin and fibromodulin were also
upregulated. Taken together, these results indicated that activation of Wnt/β-catenin signaling could induce differentiation of
BMSCs into tenomodulin-expressing tendon cells in collagen gel.
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Affiliation(s)
- Shihori Miyabara
- Department of Tissue Physiology, Tokyo University of Agriculture and Technology, Tokyo 183-8509, Japan
| | - Yohei Yuda
- Department of Tissue Physiology, Tokyo University of Agriculture and Technology, Tokyo 183-8509, Japan
| | - Yoshinori Kasashima
- Laboratory of Clinical Science and Pathobiology, Equine Research Institute, Japan Racing Association, Tochigi 320-8056, Japan
| | - Atsutoshi Kuwano
- Laboratory of Clinical Science and Pathobiology, Equine Research Institute, Japan Racing Association, Tochigi 320-8056, Japan
| | - Katsuhiko Arai
- Department of Tissue Physiology, Tokyo University of Agriculture and Technology, Tokyo 183-8509, Japan
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Barsby T, Bavin EP, Guest DJ. Three-dimensional culture and transforming growth factor beta3 synergistically promote tenogenic differentiation of equine embryo-derived stem cells. Tissue Eng Part A 2014; 20:2604-13. [PMID: 24628376 DOI: 10.1089/ten.tea.2013.0457] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
The natural reparative mechanisms triggered by tendon damage often lead to the formation of biomechanically inferior scar tissue that is prone to re-injury. Before the efficient application of stem cell-based regenerative therapies, the processes regulating tenocyte differentiation should first be better understood. Three-dimensional (3D) growth environments under strain and the exogenous addition of transforming growth factor beta3 (TGF-β3) have separately been shown to promote tendon differentiation. The aim of this study was to determine the ability of both of these factors to induce tendon differentiation of equine embryo-derived stem cells (ESCs). ESCs seeded into 3D collagen constructs can contract the matrix to a similar degree to that of tenocyte-seeded constructs and histologically appear nearly identical, with no areas of cartilage or bone tissue deposition. Tendon-associated genes and proteins Tenascin-C, Collagen Type I, and COMP are significantly up-regulated in the 3D ESC constructs compared with tenogenic induction in monolayer ESC cultures. The addition of TGF-β3 to the 3D cultures further up-regulates the expression of these genes and also induces the expression of mature tenocyte markers Tenomodulin and Thrombospondin-4. Our results show that when ESCs are exposed to the intrinsic forces exerted by a 3D culture environment, they express tendon-associated genes and proteins which are indicative of tenocyte lineage differentiation and that this effect is synergistically enhanced and accelerated by the addition of TGF-β3.
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Affiliation(s)
- Tom Barsby
- Animal Health Trust, Centre for Preventive Medicine , Newmarket, Suffolk, United Kingdom
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97
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Liu H, Zhu S, Zhang C, Lu P, Hu J, Yin Z, Ma Y, Chen X, OuYang H. Crucial transcription factors in tendon development and differentiation: their potential for tendon regeneration. Cell Tissue Res 2014; 356:287-98. [PMID: 24705622 DOI: 10.1007/s00441-014-1834-8] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2013] [Accepted: 01/30/2014] [Indexed: 12/22/2022]
Abstract
Tendons that connect muscles to bone are often the targets of sports injuries. The currently unsatisfactory state of tendon repair is largely attributable to the limited understanding of basic tendon biology. A number of tendon lineage-related transcription factors have recently been uncovered and provide clues for the better understanding of tendon development. Scleraxis and Mohawk have been identified as critical transcription factors in tendon development and differentiation. Other transcription factors, such as Sox9 and Egr1/2, have also been recently reported to be involved in tendon development. However, the molecular mechanisms and application of these transcription factors remain largely unclear and this prohibits their use in tendon therapy. Here, we systematically review and analyze recent findings and our own data concerning tendon transcription factors and tendon regeneration. Based on these findings, we provide interaction and temporal programming maps of transcription factors, as a basis for future tendon therapy. Finally, we discuss future directions for tendon regeneration with differentiation and trans-differentiation approaches based on transcription factors.
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Affiliation(s)
- Huanhuan Liu
- Center for Stem Cell and Tissue Engineering, School of Medicine, Zhejiang University, 866 Yu Hang Tang Road, Hangzhou, 310058, China
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98
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Chen X, Yin Z, Chen JL, Liu HH, Shen WL, Fang Z, Zhu T, Ji J, Ouyang HW, Zou XH. Scleraxis-overexpressed human embryonic stem cell-derived mesenchymal stem cells for tendon tissue engineering with knitted silk-collagen scaffold. Tissue Eng Part A 2014; 20:1583-92. [PMID: 24328506 DOI: 10.1089/ten.tea.2012.0656] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
AIM Despite our previous study that demonstrates that human embryonic stem cells (hESCs) can be used as seed cells for tendon tissue engineering after stepwise induction, suboptimal tendon regeneration implies that a new strategy needs to be developed for tendon repair. We investigated whether overexpression of the tendon-specific transcription factor scleraxis (SCX) in hESC-derived mesenchymal stem cells (hESC-MSCs) together with knitted silk-collagen sponge scaffold could promote tendon regeneration. METHODS AND RESULTS hESCs were initially differentiated into MSCs and then engineered with scleraxis (SCX+hESC-MSCs). Engineered tendons were constructed with SCX+hESC-MSCs and a knitted silk-collagen sponge scaffold and then mechanical stress was applied. SCX elevated tendon gene expression in hESC-MSCs and concomitantly attenuated their adipogenic and chondrogenic potential. Mechanical stress further augmented the expression of tendon-specific genes in SCX+hESC-MSC-engineered tendon. Moreover, in vivo mechanical stimulation promoted the alignment of cells and increased the diameter of collagen fibers after ectopic transplantation. In the in vivo tendon repair model, the SCX+hESC-MSC-engineered tendon enhanced the regeneration process as shown by histological scores and superior mechanical performance compared with control cells, especially at early stages. CONCLUSION Our study offers new evidence concerning the roles of SCX in tendon differentiation and regeneration. We demonstrated a novel strategy of combining hESCs, genetic engineering, and tissue-engineering principles for tendon regeneration, which are important for the future application of hESCs and silk scaffolds for tendon repair.
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Affiliation(s)
- Xiao Chen
- 1 Zhejiang Key Laboratory for Tissue Engineering and Repair Technology, School of Medicine, Zhejiang University , Hangzhou, P.R. China
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99
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Kohler J, Popov C, Klotz B, Alberton P, Prall WC, Haasters F, Müller‐Deubert S, Ebert R, Klein‐Hitpass L, Jakob F, Schieker M, Docheva D. Uncovering the cellular and molecular changes in tendon stem/progenitor cells attributed to tendon aging and degeneration. Aging Cell 2013; 12:988-99. [PMID: 23826660 PMCID: PMC4225469 DOI: 10.1111/acel.12124] [Citation(s) in RCA: 138] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/16/2013] [Indexed: 12/20/2022] Open
Abstract
Although the link between altered stem cell properties and tissue aging has been recognized, the molecular and cellular processes of tendon aging have not been elucidated. As tendons contain stem/progenitor cells (TSPC), we investigated whether the molecular and cellular attributes of TSPC alter during tendon aging and degeneration. Comparing TSPC derived from young/healthy (Y-TSPC) and aged/degenerated human Achilles tendon biopsies (A-TSPC), we observed that A-TSPC exhibit a profound self-renewal and clonogenic deficits, while their multipotency was still retained. Senescence analysis showed a premature entry into senescence of the A-TSPC, a finding accompanied by an upregulation of p16INK4A. To identify age-related molecular factors, we performed microarray and gene ontology analyses. These analyses revealed an intriguing transcriptomal shift in A-TSPC, where the most differentially expressed probesets encode for genes regulating cell adhesion, migration, and actin cytoskeleton. Time-lapse analysis showed that A-TSPC exhibit decelerated motion and delayed wound closure concomitant to a higher actin stress fiber content and a slower turnover of actin filaments. Lastly, based on the expression analyses of microarray candidates, we suggest that dysregulated cell–matrix interactions and the ROCK kinase pathway might be key players in TSPC aging. Taken together, we propose that during tendon aging and degeneration, the TSPC pool is becoming exhausted in terms of size and functional fitness. Thus, our study provides the first fundamental basis for further exploration into the molecular mechanisms behind tendon aging and degeneration as well as for the selection of novel tendon-specific therapeutical targets.
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Affiliation(s)
- Julia Kohler
- Department of Surgery Experimental Surgery and Regenerative Medicine Ludwig Maximilians University Munich Nussbaumstr. 2080336Munich Germany
| | - Cvetan Popov
- Department of Surgery Experimental Surgery and Regenerative Medicine Ludwig Maximilians University Munich Nussbaumstr. 2080336Munich Germany
| | - Barbara Klotz
- Orthopedic Centre for Musculoskeletal Research Julius Maximilians University Brettreichstr. 11 97074 Wuerzburg Germany
| | - Paolo Alberton
- Department of Surgery Experimental Surgery and Regenerative Medicine Ludwig Maximilians University Munich Nussbaumstr. 2080336Munich Germany
| | - Wolf Christian Prall
- Department of Surgery Experimental Surgery and Regenerative Medicine Ludwig Maximilians University Munich Nussbaumstr. 2080336Munich Germany
| | - Florian Haasters
- Department of Surgery Experimental Surgery and Regenerative Medicine Ludwig Maximilians University Munich Nussbaumstr. 2080336Munich Germany
| | - Sigrid Müller‐Deubert
- Orthopedic Centre for Musculoskeletal Research Julius Maximilians University Brettreichstr. 11 97074 Wuerzburg Germany
| | - Regina Ebert
- Orthopedic Centre for Musculoskeletal Research Julius Maximilians University Brettreichstr. 11 97074 Wuerzburg Germany
| | - Ludger Klein‐Hitpass
- Institute of Cell Biology (Cancer Research) Medical Faculty University of Duisburg‐Essen Virchowstr. 173 45122 Essen Germany
| | - Franz Jakob
- Orthopedic Centre for Musculoskeletal Research Julius Maximilians University Brettreichstr. 11 97074 Wuerzburg Germany
| | - Matthias Schieker
- Department of Surgery Experimental Surgery and Regenerative Medicine Ludwig Maximilians University Munich Nussbaumstr. 2080336Munich Germany
| | - Denitsa Docheva
- Department of Surgery Experimental Surgery and Regenerative Medicine Ludwig Maximilians University Munich Nussbaumstr. 2080336Munich Germany
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100
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de Bakker E, Van Ryssen B, De Schauwer C, Meyer E. Canine mesenchymal stem cells: state of the art, perspectives as therapy for dogs and as a model for man. Vet Q 2013; 33:225-33. [DOI: 10.1080/01652176.2013.873963] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
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