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Chang HN, Chen CK, Yu TY, Pang JHS, Hsu CC, Lin LP, Tsai WC. Lidocaine inhibits migration of tenocytes by downregulating focal adhesion kinase and paxillin phosphorylation. J Orthop Res 2024; 42:985-992. [PMID: 38044475 DOI: 10.1002/jor.25762] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/13/2023] [Revised: 11/27/2023] [Accepted: 11/29/2023] [Indexed: 12/05/2023]
Abstract
Lidocaine is the most frequently applied local infiltration anesthetic agent for treating tendinopathies. However, studies have discovered lidocaine to negatively affect tendon healing. In the current study, the molecular mechanisms and effects of lidocaine on tenocyte migration were evaluated. We treated tenocytes intrinsic to the Achilles tendons of Sprague-Dawley rats with lidocaine. The migration ability of cells was analyzed using electric cell-substrate impedance sensing (ECIS) and scratch wound assay. We then used a microscope to evaluate the cell spread. We assessed filamentous actin (F-actin) cytoskeleton formation through immunofluorescence staining. In addition, we used Western blot analysis to analyze the expression of phospho-focal adhesion kinase (FAK), FAK, phospho-paxillin, paxillin, and F-actin. We discovered that lidocaine had an inhibitory effect on the migration of tenocytes in the scratch wound assay and on the ECIS chip. Lidocaine treatment suppressed cell spreading and changed the cell morphology and F-actin distribution. Lidocaine reduced F-actin formation in the tenocyte during cell spreading; furthermore, it inhibited phospho-FAK, F-actin, and phospho-paxillin expression in the tenocytes. Our study revealed that lidocaine inhibits the spread and migration of tenocytes. The molecular mechanism potentially underlying this effect is downregulation of F-actin, phospho-FAK, and phospho-paxillin expression when cells are treated with lidocaine.
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Affiliation(s)
- Hsiang-Ning Chang
- Department of Physical Medicine and Rehabilitation, Chang Gung Memorial Hospital at Linkou, Taoyuan City, Taiwan
| | - Chih-Kuang Chen
- Department of Physical Medicine and Rehabilitation, Chang Gung Memorial Hospital at Taoyuan, Taoyuan City, Taiwan
| | - Tung-Yang Yu
- Department of Physical Medicine and Rehabilitation, Chang Gung Memorial Hospital at Linkou, Taoyuan City, Taiwan
| | - Jong-Hwei S Pang
- Department of Physical Medicine and Rehabilitation, Chang Gung Memorial Hospital at Linkou, Taoyuan City, Taiwan
- Graduate Institute of Clinical Medical Sciences, Chang Gung University, Taoyuan City, Taiwan
| | - Chih-Chin Hsu
- Department of Physical Medicine and Rehabilitation, Chang Gung Memorial Hospital at Keelung, Keelung City, Taiwan
| | - Li-Ping Lin
- Department of Physical Medicine and Rehabilitation, Chang Gung Memorial Hospital at Taoyuan, Taoyuan City, Taiwan
- Graduate Institute of Clinical Medical Sciences, Chang Gung University, Taoyuan City, Taiwan
| | - Wen-Chung Tsai
- Department of Physical Medicine and Rehabilitation, Chang Gung Memorial Hospital at Taoyuan, Taoyuan City, Taiwan
- School of Medicine, Chang Gung University, Taoyuan City, Taiwan
- Center of Comprehensive Sports Medicine, Chang Gung Memorial Hospital at Taoyuan, Taoyuan City, Taiwan
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2
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DiIorio SE, Young B, Parker JB, Griffin MF, Longaker MT. Understanding Tendon Fibroblast Biology and Heterogeneity. Biomedicines 2024; 12:859. [PMID: 38672213 PMCID: PMC11048404 DOI: 10.3390/biomedicines12040859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2024] [Revised: 04/06/2024] [Accepted: 04/08/2024] [Indexed: 04/28/2024] Open
Abstract
Tendon regeneration has emerged as an area of interest due to the challenging healing process of avascular tendon tissue. During tendon healing after injury, the formation of a fibrous scar can limit tendon strength and lead to subsequent complications. The specific biological mechanisms that cause fibrosis across different cellular subtypes within the tendon and across different tendons in the body continue to remain unknown. Herein, we review the current understanding of tendon healing, fibrosis mechanisms, and future directions for treatments. We summarize recent research on the role of fibroblasts throughout tendon healing and describe the functional and cellular heterogeneity of fibroblasts and tendons. The review notes gaps in tendon fibrosis research, with a focus on characterizing distinct fibroblast subpopulations in the tendon. We highlight new techniques in the field that can be used to enhance our understanding of complex tendon pathologies such as fibrosis. Finally, we explore bioengineering tools for tendon regeneration and discuss future areas for innovation. Exploring the heterogeneity of tendon fibroblasts on the cellular level can inform therapeutic strategies for addressing tendon fibrosis and ultimately reduce its clinical burden.
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Affiliation(s)
- Sarah E. DiIorio
- Hagey Laboratory for Pediatric Regenerative Medicine, Division of Plastic and Reconstructive Surgery, Department of Surgery, Stanford University School of Medicine, Stanford, CA 94305, USA; (S.E.D.); (B.Y.); (J.B.P.); (M.F.G.)
- Institute for Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Bill Young
- Hagey Laboratory for Pediatric Regenerative Medicine, Division of Plastic and Reconstructive Surgery, Department of Surgery, Stanford University School of Medicine, Stanford, CA 94305, USA; (S.E.D.); (B.Y.); (J.B.P.); (M.F.G.)
| | - Jennifer B. Parker
- Hagey Laboratory for Pediatric Regenerative Medicine, Division of Plastic and Reconstructive Surgery, Department of Surgery, Stanford University School of Medicine, Stanford, CA 94305, USA; (S.E.D.); (B.Y.); (J.B.P.); (M.F.G.)
- Institute for Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Michelle F. Griffin
- Hagey Laboratory for Pediatric Regenerative Medicine, Division of Plastic and Reconstructive Surgery, Department of Surgery, Stanford University School of Medicine, Stanford, CA 94305, USA; (S.E.D.); (B.Y.); (J.B.P.); (M.F.G.)
| | - Michael T. Longaker
- Hagey Laboratory for Pediatric Regenerative Medicine, Division of Plastic and Reconstructive Surgery, Department of Surgery, Stanford University School of Medicine, Stanford, CA 94305, USA; (S.E.D.); (B.Y.); (J.B.P.); (M.F.G.)
- Institute for Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
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3
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De Castilho T, Rosa GDS, Stievani FC, Apolônio EVP, Pfeifer JPH, Altheman VG, Palialogo V, Santos NJ, Fonseca-Alves CE, Alves ALG. Biocompatibility of hydrogel derived from equine tendon extracellular matrix in horses subcutaneous tissue. Front Bioeng Biotechnol 2024; 11:1296743. [PMID: 38260745 PMCID: PMC10801062 DOI: 10.3389/fbioe.2023.1296743] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Accepted: 12/04/2023] [Indexed: 01/24/2024] Open
Abstract
Tendinopathies account for a substantial proportion of musculoskeletal injuries. To improve treatment outcomes for partial and total tendon ruptures, new therapies are under investigation. These include the application of mesenchymal stem cells (MSCs) and biocompatible scaffolds derived from the Extracellular Matrix (ECM). Synthetic polymer hydrogels have not demonstrated results as promising as those achieved with ECM hydrogels sourced from the original tissue. This study aimed to evaluate the biocompatibility of a hydrogel formulated from equine tendon ECM. Six horses were administered three subcutaneous doses of the hydrogel, with a saline solution serving as a control. Biopsies were conducted on days 7, 14, and 56 post-application to gauge the hydrogel's impact. Throughout the experiment, the horse's physical condition remained stable. Thermographic analyses revealed a temperature increase in the treated groups compared to the control group within the initial 12 h. The von Frey test, used to measure the mechanical nociceptive threshold, also showed significant differences between the treated group and the control group at 6 h, 21 days, and 28 days. Histopathological analyses identified an inflammatory response on day 7, which was absent on days 14 and 56. Transmission electron microscopy indicated a decrease in inflammatory cellularity, while immunohistochemistry staining suggested an increased presence of inflammatory factors on day 14. In summary, the hydrogel is easily injectable, triggers a temporary local inflammatory response, and integrates into the adjacent tissue from day 14 onwards.
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Affiliation(s)
- Thiago De Castilho
- Department of Veterinary Surgery and Animal Reproduction, Regenerative Medicine Lab, School of Veterinary Medicine and Animal Science, São Paulo State University (UNESP), Botucatu, Brazil
| | - Gustavo dos Santos Rosa
- Department of Veterinary Surgery and Animal Reproduction, Regenerative Medicine Lab, School of Veterinary Medicine and Animal Science, São Paulo State University (UNESP), Botucatu, Brazil
| | - Fernanda de Castro Stievani
- Department of Veterinary Surgery and Animal Reproduction, Regenerative Medicine Lab, School of Veterinary Medicine and Animal Science, São Paulo State University (UNESP), Botucatu, Brazil
| | - Emanuel Vítor Pereira Apolônio
- Department of Veterinary Surgery and Animal Reproduction, Regenerative Medicine Lab, School of Veterinary Medicine and Animal Science, São Paulo State University (UNESP), Botucatu, Brazil
| | - João Pedro Hübbe Pfeifer
- Department of Veterinary Surgery and Animal Reproduction, Regenerative Medicine Lab, School of Veterinary Medicine and Animal Science, São Paulo State University (UNESP), Botucatu, Brazil
| | - Vittoria Guerra Altheman
- Department of Veterinary Surgery and Animal Reproduction, Regenerative Medicine Lab, School of Veterinary Medicine and Animal Science, São Paulo State University (UNESP), Botucatu, Brazil
| | - Valéria Palialogo
- Department of Veterinary Surgery and Animal Reproduction, Regenerative Medicine Lab, School of Veterinary Medicine and Animal Science, São Paulo State University (UNESP), Botucatu, Brazil
| | - Nilton José Dos Santos
- Laboratory of Metabolic Disorders, School of Applied Sciences, University of Campinas (UNICAMP), São Paulo, Brazil
| | - Carlos Eduardo Fonseca-Alves
- Department of Veterinary Surgery and Animal Reproduction, School of Veterinary Medicine and Animal Science, São Paulo State University (UNESP), Botucatu, Brazil
| | - Ana Liz Garcia Alves
- Department of Veterinary Surgery and Animal Reproduction, Regenerative Medicine Lab, School of Veterinary Medicine and Animal Science, São Paulo State University (UNESP), Botucatu, Brazil
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Li J, Zhou X, Chen J, Eliasson P, Kingham PJ, Backman LJ. Secretome from myoblasts statically loaded at low intensity promotes tenocyte proliferation via the IGF-1 receptor pathway. FASEB J 2023; 37:e23203. [PMID: 37732638 DOI: 10.1096/fj.202301097r] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Revised: 08/16/2023] [Accepted: 09/05/2023] [Indexed: 09/22/2023]
Abstract
Exercise is widely recognized as beneficial for tendon healing. Recently, it has been described that muscle-derived molecules secreted in response to static exercise influence tendon healing. In this study, the optimal static loading intensity for tendon healing and the composition of secretome released by myoblasts in response to different intensities of static strain were investigated. In an in vitro coculture model, myoblasts were mechanically loaded using a Flexcell Tension System. Tenocytes were seeded on transwell inserts that allowed communication between the tenocytes and myoblasts without direct contact. Proliferation and migration assays, together with RNA sequencing, were used to determine potential cellular signaling pathways. The secretome from myoblasts exposed to 2% static loading increased the proliferation and migration of the cocultured tenocytes. RNA-seq analysis revealed that this loading condition upregulated the expression of numerous genes encoding secretory proteins, including insulin-like growth factor-1 (IGF-1). Confirmation of IGF-1 expression and secretion was carried out using qPCR and enzyme-linked immunosorbt assay (ELISA), revealing a statistically significant upregulation in response to 2% static loading in comparison to both control conditions and higher loading intensities of 5% and 10%. Addition of an inhibitor of the IGF-1 receptor (PQ401) to the tenocytes significantly reduced myoblast secretome-induced tenocyte proliferation. In conclusion, IGF-1 may be an important molecule in the statically loaded myoblast secretome, which is responsible for influencing tenocytes during exercise-induced healing.
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Affiliation(s)
- Junhong Li
- Department of Integrative Medical Biology, Umeå University, Umeå, Sweden
- Department of Community Medicine and Rehabilitation, Physiotherapy, Umeå University, Umeå, Sweden
| | - Xin Zhou
- Department of Community Medicine and Rehabilitation, Physiotherapy, Umeå University, Umeå, Sweden
| | - Jialin Chen
- School of Medicine, Southeast University, Nanjing, China
| | - Pernilla Eliasson
- Department of Orthopaedics, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Paul J Kingham
- Department of Integrative Medical Biology, Umeå University, Umeå, Sweden
| | - Ludvig J Backman
- Department of Integrative Medical Biology, Umeå University, Umeå, Sweden
- Department of Community Medicine and Rehabilitation, Physiotherapy, Umeå University, Umeå, Sweden
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5
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Di Giacomo G, Vadalà G, Ambrosio L, Cicione C, Tilotta V, Cannata F, Russo F, Papalia R, Denaro V. Irisin inhibits tenocyte response to inflammation in vitro: New insights into tendon-muscle cross-talk. J Orthop Res 2023; 41:2195-2204. [PMID: 37132159 DOI: 10.1002/jor.25586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 04/17/2023] [Accepted: 05/01/2023] [Indexed: 05/04/2023]
Abstract
Tendinopathy is one of the most common musculoskeletal disorders with significant repercussions on quality of life and sport activities. Physical exercise (PE) is considered the first-line approach to treat tendinopathy due renowned mechanobiological effects on tenocytes. Irisin, a recently identified myokine released during PE, has been recognized for several beneficial effects towards muscle, cartilage, bone, and intervertebral disc tissues. The aim of this study was to evaluate the effects of irisin on human primary tenocytes (hTCs) in vitro. Human tendons were harvested from specimens of patients undergoing anterior cruciate ligament reconstruction (n = 4). After isolation and expansion, hTCs were treated with RPMI medium (negative control), interleukin (IL)-1β or tumor necrosis factor-α (TNF-α) (positive controls; 10 ng/mL), irisin (5, 10, 25 ng/mL), IL-1β or TNF-α pretreatment and subsequent co-treatment with irisin, pretreatment with irisin and subsequent co-treatment with IL-1β or TNF-α. hTC metabolic activity, proliferation, and nitrite production were evaluated. Detection of unphosphorylated and phosphorylated p38 and ERK was performed. Tissue samples were analyzed by histology and immunohistochemistry to evaluate irisin αVβ5 receptor expression. Irisin significantly increased hTC proliferation and metabolic activity, while reducing the production of nitrites both before and after the addition of IL-1β and TNF-α. Interestingly, irisin reduced p-p38 and pERK levels in inflamed hTCs. The αVβ5 receptor was uniformly expressed on hTC plasma membranes, supporting the potential binding of irisin. This is the first study reporting the capacity of irisin to target hTCs and modulating their response to inflammatory stresses, possibly orchestrating a biological crosstalk between the muscle and tendon.
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Affiliation(s)
- Giuseppina Di Giacomo
- Laboratory for Regenerative Orthopaedics, Research Unit of Orthopaedic and Trauma Surgery, Department of Medicine and Surgery, Università Campus Bio-Medico di Roma, Rome, Italy
| | - Gianluca Vadalà
- Laboratory for Regenerative Orthopaedics, Research Unit of Orthopaedic and Trauma Surgery, Department of Medicine and Surgery, Università Campus Bio-Medico di Roma, Rome, Italy
- Operative Research Unit of Orthopaedic and Trauma Surgery, Fondazione Policlinico Universitario Campus Bio-Medico, Rome, Italy
| | - Luca Ambrosio
- Laboratory for Regenerative Orthopaedics, Research Unit of Orthopaedic and Trauma Surgery, Department of Medicine and Surgery, Università Campus Bio-Medico di Roma, Rome, Italy
- Operative Research Unit of Orthopaedic and Trauma Surgery, Fondazione Policlinico Universitario Campus Bio-Medico, Rome, Italy
| | - Claudia Cicione
- Laboratory for Regenerative Orthopaedics, Research Unit of Orthopaedic and Trauma Surgery, Department of Medicine and Surgery, Università Campus Bio-Medico di Roma, Rome, Italy
| | - Veronica Tilotta
- Laboratory for Regenerative Orthopaedics, Research Unit of Orthopaedic and Trauma Surgery, Department of Medicine and Surgery, Università Campus Bio-Medico di Roma, Rome, Italy
| | - Francesca Cannata
- Research Unit of Endocrinology and Diabetes, Università Campus Bio-Medico di Roma, Rome, Italy
| | - Fabrizio Russo
- Laboratory for Regenerative Orthopaedics, Research Unit of Orthopaedic and Trauma Surgery, Department of Medicine and Surgery, Università Campus Bio-Medico di Roma, Rome, Italy
- Operative Research Unit of Orthopaedic and Trauma Surgery, Fondazione Policlinico Universitario Campus Bio-Medico, Rome, Italy
| | - Rocco Papalia
- Laboratory for Regenerative Orthopaedics, Research Unit of Orthopaedic and Trauma Surgery, Department of Medicine and Surgery, Università Campus Bio-Medico di Roma, Rome, Italy
- Operative Research Unit of Orthopaedic and Trauma Surgery, Fondazione Policlinico Universitario Campus Bio-Medico, Rome, Italy
| | - Vincenzo Denaro
- Operative Research Unit of Orthopaedic and Trauma Surgery, Fondazione Policlinico Universitario Campus Bio-Medico, Rome, Italy
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Ge R, Ruan B, Chen S, Bai S, Gao Q, Dong A. Radial extracorporeal shock wave therapy alleviates acute inflammation of human primary tenocytes through the integrin-FAK-p38MAPK pathway. Am J Transl Res 2023; 15:3229-3239. [PMID: 37303680 PMCID: PMC10251031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2023] [Accepted: 04/28/2023] [Indexed: 06/13/2023]
Abstract
OBJECTIVES To explore whether radial extracorporeal shock wave therapy (rESWT) can alleviate acute inflammation of human primary tenocytes by the integrin-focal adhesion kinase (FAK)-p38 mitogen-activated protein kinase (MAPK) pathway. METHODS Western blotting was used to evaluate the changes in the integrin-FAK-p38MAPK signaling pathway mediated by rESWT using specific antibodies targeting the phosphorylation sites of intracellular signal pathway proteins. RESULTS rESWT up-regulated FAK phosphorylation and down-regulated p38MAPK phosphorylation levels in a tumor necrosis factor (TNF)-α-induced acute inflammation model of human primary tenocytes. Pretreatment with an integrin inhibitor significantly reduced rESWT-mediated downregulation of p38MAPK phosphorylation and attenuated its reversal effect on the increased secretion of pro-inflammatory cytokines in TNF-α-induced human primary tenocytes. CONCLUSIONS Our results imply that rESWT may partially alleviate acute inflammation in human primary tenocytes through the integrin-FAK-p38MAPK pathway.
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Affiliation(s)
- Ruidong Ge
- School of Sports Medicine and Rehabilitation, Beijing Sport UniversityBeijing 100084, China
- Department of Rehabilitation Medicine, China-Japan Friendship HospitalBeijing 100029, China
| | - Bin Ruan
- School of Sports Medicine and Rehabilitation, Beijing Sport UniversityBeijing 100084, China
| | - Shengxuan Chen
- Department of Rehabilitation Medicine, The Gulou Hospital of Traditional Chinese MedicineBeijing 100009, China
| | - Shuo Bai
- Department of Rehabilitation Medicine, Beijing Chaoyang District Taiyanggong Community Health Service CenterBeijing 100028, China
| | - Qi Gao
- School of Sports Medicine and Rehabilitation, Beijing Sport UniversityBeijing 100084, China
| | - Anran Dong
- School of Sports Medicine and Rehabilitation, Beijing Sport UniversityBeijing 100084, China
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von Stade D, Meyers M, Johnson J, Schlegel TT, Romeo A, Regan D, McGilvray K. Exosome Cell Origin Affects In Vitro Markers of Tendon Repair in Ovine Macrophages and Tenocytes. Tissue Eng Part A 2023; 29:282-291. [PMID: 36792933 PMCID: PMC10178933 DOI: 10.1089/ten.tea.2022.0185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Accepted: 01/10/2023] [Indexed: 02/17/2023] Open
Abstract
Tendon injuries and disease are resistant to surgical repair; thus, adjunct therapies are widely investigated, especially mesenchymal stromal cells (MSCs) and, more recently, their extracellular vesicles (MSCdEVs), for example, exosomes. Thought to act on resident and infiltrating immune cells, the role of MSCdEVs in paracrine signaling is of great interest. This study investigated how MSCdEVs differ from analogs derived from resident (tenocyte) populations (TdEV). As macrophages play a significant role in tendon maintenance and repair, macrophage signaling was compared by cytokine quantification using a multiplexed immunoassay and tenocyte migration by in vitro scratch-wound analysis. TdEV-treated macrophages decreased IL-1 and increased MIP-1 and CXCL8 expression. In addition, macrophage signaling favored collagen synthesis and tenocyte bioactivity, while reducing proangiogenic signaling when TdEVs were used in place of MSCdEVs. These in vitro data demonstrate a differential influence of exosomes on macrophage signaling, according to cell source, supporting that local cell-derived exosomes may preferentially drive healing by different means with possible different outcomes compared to MSCdEVs. Impact Statement Adipose-derived mesenchymal stromal cell (AdMSC) exosomes (EVs) can improve tendon mechanical resilience, tissue organization, and M2 macrophage phenotype predominance in response to tendon injury. This active area of investigation drives great interest in the function of these exosomes as adjunct therapies for tendon disease, particularly rotator cuff tendinopathy. However, little is known about the effects of EVs as a function of cell source, nor regarding their efficacy in preclinical translational ovine models. Herein we demonstrate a differential effect of exosomes as a function of cell source, tenocyte compared to AdMSCs, on macrophage signaling and tenocyte migration of ovine cells.
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Affiliation(s)
- Devin von Stade
- Department of Mechanical Engineering, Orthopaedic Bioengineering Research Laboratory, Colorado State University, Fort Collins, Colorado, USA
| | - Melinda Meyers
- Department of Clinical Sciences, Animal Reproduction and Biotechnology Laboratory, Colorado State University, Fort Collins, Colorado, USA
| | - James Johnson
- Department of Mechanical Engineering, Orthopaedic Bioengineering Research Laboratory, Colorado State University, Fort Collins, Colorado, USA
| | | | - Anthony Romeo
- Shoulder Elbow Sports Medicine, Chicago, Illinois, USA
| | - Daniel Regan
- Department of Microbiology, Immunology, and Pathology, Flint Animal Cancer Center, Colorado State University, Fort Collins, Colorado, USA
| | - Kirk McGilvray
- Department of Mechanical Engineering, Orthopaedic Bioengineering Research Laboratory, Colorado State University, Fort Collins, Colorado, USA
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8
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Chhana A, Pool B, Callon KE, Naot D, Gao R, Coleman B, Cornish J, McCarthy GM, Dalbeth N. Basic calcium phosphate crystals induce the expression of extracellular matrix remodelling enzymes in tenocytes. Rheumatology (Oxford) 2023; 62:1343-1349. [PMID: 35809060 DOI: 10.1093/rheumatology/keac392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 07/02/2022] [Accepted: 07/02/2022] [Indexed: 11/12/2022] Open
Abstract
OBJECTIVES Basic calcium phosphate (BCP) crystals contribute to several syndromes associated with tendon disease, including acute calcific tendinitis and Milwaukee shoulder syndrome. Interactions between BCP crystals and tenocytes (tendon cells) may contribute to these clinical syndromes. This study aimed to determine the direct effects of BCP crystals on tenocyte function and viability. METHODS In vitro assays were used to assess changes in human tenocytes cultured with BCP crystals. Real-time PCR was used to determine changes in the expression of tendon-related genes and extracellular matrix remodelling enzymes (MMPs; a disintegrin and metalloproteases, ADAMTS; and tissue inhibitor of metalloproteinases, TIMPs). ELISA was used to measure protein concentrations in tenocyte supernatants. MTT and alamarBlue™ assays were used to determine changes in cell viability. RESULTS BCP crystals upregulated tenocyte gene expression of MMP-1, MMP-3, ADAMTS-4 and TIMP-1 after 24 h. Time-course experiments showed expression peaked at 8 h for TIMP-1 and 48 h for MMP-1 and ADAMTS-4. Cyclooxygenase (COX)-1 gene expression was upregulated after 48 h. Tenocytes did not alter expression of scleraxis and tendon collagens, and expression of pro-inflammatory cytokines was not induced with BCP crystals. BCP crystals increased tenocyte release of prostaglandin E2 (PGE2) and MMP-1 protein after 24 h. However, neither COX-1 inhibition nor COX-2 inhibition led to consistent change in BCP crystal-induced tenocyte gene expression of extracellular matrix remodelling enzymes. BCP crystals had no effect on tenocyte viability. CONCLUSION BCP crystals induce extracellular matrix remodelling enzymes, but not inflammatory cytokines, in tenocytes.
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Affiliation(s)
- Ashika Chhana
- Bone & Joint Research Group, Department of Medicine, University of Auckland
| | - Bregina Pool
- Bone & Joint Research Group, Department of Medicine, University of Auckland
| | - Karen E Callon
- Bone & Joint Research Group, Department of Medicine, University of Auckland
| | - Dorit Naot
- Bone & Joint Research Group, Department of Medicine, University of Auckland
| | - Ryan Gao
- Bone & Joint Research Group, Department of Medicine, University of Auckland
| | - Brendan Coleman
- Department of Orthopaedic Surgery, Middlemore Hospital, Auckland, New Zealand
| | - Jillian Cornish
- Bone & Joint Research Group, Department of Medicine, University of Auckland
| | - Geraldine M McCarthy
- Department of Rheumatology, Mater Misericordiae University Hospital, Dublin, Ireland
| | - Nicola Dalbeth
- Bone & Joint Research Group, Department of Medicine, University of Auckland
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9
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Disser NP, Piacentini AN, De Micheli AJ, Schonk MM, Yao VJH, Deng XH, Oliver DJ, Rodeo SA. Achilles Tendons Display Region-Specific Transcriptomic Signatures Associated With Distinct Mechanical Properties. Am J Sports Med 2022; 50:3866-3874. [PMID: 36305762 DOI: 10.1177/03635465221128589] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
BACKGROUND Previous studies have examined the transcriptomes and mechanical properties of whole tendons in different regions of the body. However, less is known about these characteristics within a single tendon. PURPOSE To develop a regional transcriptomic atlas and evaluate the region-specific mechanical properties of Achilles tendons. STUDY DESIGN Descriptive laboratory study. METHODS Achilles tendons from 2-month-old male Sprague Dawley rats were used. Tendons were isolated and divided into proximal, middle, and distal thirds for RNA sequencing (n = 5). For mechanical testing, the Achilles muscle-tendon-calcaneus unit was mounted in a custom-designed materials testing system with the unit clamped over the musculotendinous junction (MTJ) and the calcaneus secured at 90° of dorsiflexion (n = 9). Tendons were stretched to 20 N at a constant speed of 0.0167 mm/s. Cross-sectional area, strain, stress, and Young modulus were determined in each tendon region. RESULTS An open-access, interactive transcriptional atlas was generated that revealed distinct gene expression signatures in each tendon region. The proximal and distal regions had the largest differences in gene expression, with 2596 genes significantly differentially regulated at least 1.5-fold (q < .01). The proximal tendon displayed increased expression of genes resembling a tendon phenotype and increased expression of nerve cell markers. The distal region displayed increases in genes involved in extracellular matrix synthesis and remodeling, immune cell regulation, and a phenotype similar to cartilage and bone. There was a 3.72-fold increase in Young modulus from the proximal to middle region (P < .01) and an additional 1.34-fold increase from the middle to distal region (P = .027). CONCLUSION Within a single tendon, there are region-specific transcriptomic signatures and mechanical properties, and there is likely a gradient in the biological and functional phenotype from the proximal origin at the MTJ to the distal insertion at the enthesis. CLINICAL RELEVANCE These findings improve our understanding of the underlying biological heterogeneity of tendon tissue and will help inform the future targeted use of regenerative medicine and tissue engineering strategies for patients with tendon disorders.
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Affiliation(s)
- Nathaniel P Disser
- Hospital for Special Surgery, New York, New York, USA.,McGovern Medical School, The University of Texas Health Science Center at Houston, Houston, Texas, USA
| | | | - Andrea J De Micheli
- Hospital for Special Surgery, New York, New York, USA.,Department of Oncology of the Children's Research Center, University Children's Hospital Zürich, Zürich, Switzerland
| | | | - Vincent J H Yao
- Hospital for Special Surgery, New York, New York, USA.,Sophie Davis Biomedical Education Program at CUNY School of Medicine, New York, New York, USA
| | | | - David J Oliver
- Hospital for Special Surgery, New York, New York, USA.,The David Z. Rosensweig Genomics Research Center, Hospital for Special Surgery, New York, New York, USA
| | - Scott A Rodeo
- Hospital for Special Surgery, New York, New York, USA
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10
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Nguyen PK, Deng F, Assi S, Paco P, Fink S, Stockwell C, Kuo CK. Phenotype stability, expansion potential, and senescence of embryonic tendon cells in vitro. J Orthop Res 2022; 40:1584-1592. [PMID: 34559908 DOI: 10.1002/jor.25180] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 08/28/2021] [Accepted: 09/07/2021] [Indexed: 02/04/2023]
Abstract
Embryonic tendon cells have been studied in vitro to better understand mechanisms of tendon development. Outcomes of in vitro cell culture studies are easily affected by phenotype instability of embryonic tendon cells during expansion in vitro to achieve desired cell numbers, yet this has not been characterized. In the present study, we characterized phenotype stability, expansion potential, and onset of senescence in chick embryo tendon cells from low to high cell doublings. We focused on cells of Hamburger-Hamilton stages (HH) 40 and HH42, where HH40 is the earliest stage associated with substantial increases in extracellular matrix and mechanical properties during embryonic tendon development. HH40 and HH42 cells both downregulated expression levels of tendon phenotype markers, scleraxis and tenomodulin, and exhibited onset of senescence, based on p16 and p21 expression levels, cell surface area, and percentage of β-galactosidase positive cells, before significant decreases in proliferation rates were detected. These findings showed that embryonic tendon cells destabilize phenotype and become senescent earlier than they begin to decline in proliferation rates in vitro. Additionally, embryonic stage of isolation appears to have no effect on proliferation rates, whereas later stage HH42 cells downregulate phenotype and become susceptible to senescence sooner than earlier stage HH40 cells. Based on our data, we recommend chick embryo tendon cells be used before a maximum cumulative doubling level of 12 (passage 4 in this study) to avoid phenotype destabilization and onset of senescence.
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Affiliation(s)
- Phong K Nguyen
- Department of Biomedical Engineering, University of Rochester, New York, USA.,Center for Musculoskeletal Research, University of Rochester Medical Center, Rochester, New York, USA
| | - Feiyang Deng
- Department of Biomedical Engineering, University of Rochester, New York, USA
| | - Sereen Assi
- Department of Biomedical Engineering, University of Rochester, New York, USA
| | - Paolo Paco
- Department of Biomedical Engineering, University of Rochester, New York, USA
| | - Spencer Fink
- Department of Biomedical Engineering, University of Rochester, New York, USA
| | - Caroline Stockwell
- Department of Biomedical Engineering, University of Rochester, New York, USA
| | - Catherine K Kuo
- Department of Biomedical Engineering, University of Rochester, New York, USA.,Center for Musculoskeletal Research, University of Rochester Medical Center, Rochester, New York, USA.,Department of Orthopaedics, University of Rochester Medical Center, Rochester, New York, USA.,Fischell Department of Bioengineering, University of Maryland, College Park, Maryland, USA.,Department of Orthopaedics, University of Maryland School of Medicine, Baltimore, Maryland, USA
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11
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Oeyen AL, Kircher J, Vogl M, Ickert I, Osada N, Krauspe R, Bittersohl B, Herten M. Dexamethasone Does not Compensate for Local Anesthetic Cytotoxic Effects on Tenocytes: Morphine or Morphine Plus Dexamethasone May Be a Safe Alternative. Arthrosc Sports Med Rehabil 2022; 4:e459-e469. [PMID: 35494256 PMCID: PMC9042774 DOI: 10.1016/j.asmr.2021.11.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Accepted: 11/03/2021] [Indexed: 12/16/2022] Open
Abstract
Purpose The purposes of this in vitro study were to investigate whether the addition of dexamethasone can compensate for any cytotoxic effects of the amide-type local anesthetics (LA) bupivacaine and ropivacaine and whether morphine and morphine-6-glucuronide (M6G) may be a safe alternative for peritendinous application. Methods Biopsies of human biceps tendons (n = 6) were dissected and cultivated. Cells were characterized by the expression for tenocyte markers, collagen I, biglycan, tenascin C, scleraxis, and RUNX via reverse transcriptase-polymerase chain reaction and immunohistochemistry. Tenocytes were incubated with bupivacaine, ropivacaine, morphine, M6G, or a saline control with and without addition of dexamethasone for 15, 60, or 240 min. Cell viability was determined by quantifying the presence of adenosine-triphosphate. Results Significant time-dependent cytotoxic effects were observed for LA after all exposure times. After 15, 60, and 240 minutes, cell viability decreased to 81.1%, 49.4% and 0% (P < .001) for bupivacaine and to 81.4%, 69.6%, and 9.3% (P < .001) for ropivacaine compared to saline control. Dexamethasone did not compensate for these cytotoxic effects. Cell viability was not affected after 15, 60-min exposures to morphine and M6G but decreased significantly (P < .001) after 240 minutes compared to saline control. However, in combination with dexamethasone, tenocyte viability was significantly increased at all times for morphine (P < .01) and at 15 and 60 minutes for M6G (P < .01). Conclusions The results showed that amide-type LA have a time-dependent cytotoxic effect on human tenocytes in vitro, which could not be compensated for by dexamethasone, whereas morphine and M6G had no cytotoxic effects on tenocytes after 15 and 60 minutes. The addition of dexamethasone to morphine and M6G had a positive effect on viability, which increased significantly compared to the opioids. Clinical Relevance It is known that amide-type local anesthetics used for local joint analgesia have chondrotoxic side-effects. The combined application of morphine and dexamethasone may be a safe alternative.
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Affiliation(s)
- Anne Lene Oeyen
- Department of Orthopedic and Trauma Surgery, Caritas-Klinik Maria Heimsuchung Berlin-Pankow, Berlin, Germany.,Department of Orthopedic Surgery, Medical Faculty, Heinrich-Heine University Düsseldorf, Düsseldorf, Germany
| | - Jörn Kircher
- Department of Shoulder and Elbow Surgery, ATOS Klinik Fleetinsel Hamburg, Hamburg, Germany.,Department of Orthopedic Surgery, Medical Faculty, Heinrich-Heine University Düsseldorf, Düsseldorf, Germany
| | - Melanie Vogl
- Department of Pediatrics, University Hospital Essen, Essen, Germany
| | - Irina Ickert
- Department of Medicine II, Rheinlandklinikum Neuss, Neuss, Germany
| | - Nani Osada
- Department of Medical Statistics and Biomathematics (formerly), University of Münster, Münster, Germany
| | - Rüdiger Krauspe
- Department of Orthopedic Surgery, Medical Faculty, Heinrich-Heine University Düsseldorf, Düsseldorf, Germany
| | - Bernd Bittersohl
- Department of Orthopedic Surgery, Medical Faculty, Heinrich-Heine University Düsseldorf, Düsseldorf, Germany.,Department of Orthopedic and Trauma Surgery, Medical Faculty, Heinrich-Heine University Düsseldorf, Düsseldorf, Germany
| | - Monika Herten
- Department of Orthopedic Surgery, Medical Faculty, Heinrich-Heine University Düsseldorf, Düsseldorf, Germany.,Department of Trauma, Hand and Reconstructive Surgery, University Hospital Essen, Essen, Germany
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12
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Zhou X, Li J, Giannopoulos A, Kingham PJ, Backman LJ. Secretome from In Vitro Mechanically Loaded Myoblasts Induces Tenocyte Migration, Transition to a Fibroblastic Phenotype and Suppression of Collagen Production. Int J Mol Sci 2021; 22:13089. [PMID: 34884895 DOI: 10.3390/ijms222313089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Revised: 11/29/2021] [Accepted: 12/01/2021] [Indexed: 11/16/2022] Open
Abstract
It is known that mechanical loading of muscles increases the strength of healing tendon tissue, but the mechanism involved remains elusive. We hypothesized that the secretome from myoblasts in co-culture with tenocytes affects tenocyte migration, cell phenotype, and collagen (Col) production and that the effect is dependent on different types of mechanical loading of myoblasts. To test this, we used an in vitro indirect transwell co-culture system. Myoblasts were mechanically loaded using the FlexCell® Tension system. Tenocyte cell migration, proliferation, apoptosis, collagen production, and several tenocyte markers were measured. The secretome from myoblasts decreased the Col I/III ratio and increased the expression of tenocyte specific markers as compared with tenocytes cultured alone. The secretome from statically loaded myoblasts significantly enhanced tenocyte migration and Col I/III ratio as compared with dynamic loading and controls. In addition, the secretome from statically loaded myoblasts induced tenocytes towards a myofibroblast-like phenotype. Taken together, these results demonstrate that the secretome from statically loaded myoblasts has a profound influence on tenocytes, affecting parameters that are related to the tendon healing process.
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13
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Ortega-Cebrián S, Navarro R, Seda S, Salas S, Guerra-Balic M. Patellar Tendon Structural Adaptations Occur during Pre-Season and First Competitive Cycle in Male Professional Handball Players. Int J Environ Res Public Health 2021; 18:ijerph182212156. [PMID: 34831912 PMCID: PMC8624795 DOI: 10.3390/ijerph182212156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Revised: 11/13/2021] [Accepted: 11/15/2021] [Indexed: 12/03/2022]
Abstract
Background: While there is evidence that tendon adapts to training load, structural alterations in the patellar tendon in response to training loads are still unclear. The aim of this study is to identify changes in patellar tendon structure throughout pre-season and after finalizing the first competitive cycle. Methods: Nineteen professional handball players participated in the aforesaid cross-sectional study, in which patellar tendon scan and counter movement jump (CMJ) performance were conducted. Measurements were taken on the first and last day of pre-season training, and at the end of the first competitive cycle. Results: The results revealed that variation on the tendon structure occurred, mainly at the end of pre-season training; for injured tendons this occurred at the proximal (Right p = 0.02), distal (Right p = 0.01), and (Left p = 0.02) tendon, while changes in healthy tendons occurred at the mid (Left p = 0.01) and distal tendon (Right p = 0.01). At the end of the first competitive cycle, changes were observed in the distal injured tendon (p = 0.02). Conclusion: Patellar tendon shows greater structural change after completing pre-season training than at the end of the first competitive cycle, from which it may be inferred that gradual loading during pre-season training allows the tendon to adapt and potentially decrease the onset of patellar tendinopathy.
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Affiliation(s)
- Silvia Ortega-Cebrián
- Physiotherapy Department, Facultat Fisioteràpia, Universitat Internacional de Catalunya (UIC), Carrer Josep Trueta, Sant Cugat de Vallès, 08017 Barcelona, Spain
- Futbol Club Barcelona, Medical Department, Ciutat Esportiva Joan Gamper, Avinguda, Once Setembre, Sant Joan Despí, 08970 Barcelona, Spain; (R.N.); (S.S.); (S.S.)
- Correspondence: ; Tel.: +34-932541800
| | - Ramon Navarro
- Futbol Club Barcelona, Medical Department, Ciutat Esportiva Joan Gamper, Avinguda, Once Setembre, Sant Joan Despí, 08970 Barcelona, Spain; (R.N.); (S.S.); (S.S.)
| | - Sergi Seda
- Futbol Club Barcelona, Medical Department, Ciutat Esportiva Joan Gamper, Avinguda, Once Setembre, Sant Joan Despí, 08970 Barcelona, Spain; (R.N.); (S.S.); (S.S.)
| | - Sebastià Salas
- Futbol Club Barcelona, Medical Department, Ciutat Esportiva Joan Gamper, Avinguda, Once Setembre, Sant Joan Despí, 08970 Barcelona, Spain; (R.N.); (S.S.); (S.S.)
| | - Myriam Guerra-Balic
- Faculty of Psychology, Education and Sports Sciences, University Ramon Llull, Spain FPCEE-Blanquerna, 08022 Barcelona, Spain;
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14
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Lee JM, Hwang JW, Kim MJ, Jung SY, Kim KS, Ahn EH, Min K, Choi YS. Mitochondrial Transplantation Modulates Inflammation and Apoptosis, Alleviating Tendinopathy Both In Vivo and In Vitro. Antioxidants (Basel) 2021; 10:696. [PMID: 33925007 DOI: 10.3390/antiox10050696] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Revised: 04/23/2021] [Accepted: 04/26/2021] [Indexed: 12/22/2022] Open
Abstract
Tendinopathy is a common musculoskeletal condition causing pain and dysfunction. Conventional treatment and surgical procedures for tendinopathy are insufficient; accordingly, recent research has focused on tendon-healing regenerative approaches. Tendon injuries usually occur in the hypoxic critical zone, characterized by increased oxidative stress and mitochondrial dysfunction; thus, exogenous intact mitochondria may be therapeutic. We aimed to assess whether mitochondrial transplantation could induce anti-inflammatory activity and modulate the metabolic state of a tendinopathy model. Exogenous mitochondria were successfully delivered into damaged tenocytes by centrifugation. Levels of Tenomodulin and Collagen I in damaged tenocytes were restored with reductions in nuclear factor-κB and matrix metalloproteinase 1. The dysregulation of oxidative stress and mitochondrial membrane potential was attenuated by mitochondrial transplantation. Activated mitochondrial fission markers, such as fission 1 and dynamin-related protein 1, were dose-dependently downregulated. Apoptosis signaling pathway proteins were restored to the pre-damage levels. Similar changes were observed in a collagenase injection-induced rat model of tendinopathy. Exogenous mitochondria incorporated into the Achilles tendon reduced inflammatory and fission marker levels. Notably, collagen production was restored. Our results demonstrate the therapeutic effects of direct mitochondrial transplantation in tendinopathy. These effects may be explained by alterations in anti-inflammatory and apoptotic processes via changes in mitochondrial dynamics.
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15
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Takahashi N, Kametani K, Ota R, Tangkawattana P, Iwasaki T, Hasegawa Y, Ueda H, Hosotani M, Watanabe T. Three-dimensional ultrastructure reconstruction of tendinous components at the bifurcation of the bovine superficial digital flexor tendon using array and STEM tomographies. J Anat 2021; 238:63-72. [PMID: 32794178 PMCID: PMC7754896 DOI: 10.1111/joa.13294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Revised: 07/17/2020] [Accepted: 07/17/2020] [Indexed: 01/03/2023] Open
Abstract
Tendons transmit force from muscle to bone for joint movement. Tenocytes are a specialized type of fibroblast that produces collagen fibrils in tendons. Their cytoplasmic processes form a network surrounding collagen fibrils to define a collagen fibre. Glycosaminoglycan (GAG) chains link collagen fibrils and adhere at the D-band of the collagen fibril. In this study, we used array and scanning transmission electron microscope (STEM) tomographies to reconstruct the three-dimensional ultrastructure of tenocytes, collagen fibres, collagen fibrils and GAG chains at the bifurcation of the bovine hindlimb superficial digital flexor tendon (SDFT). Collagen fibrils comprising a collagen fibre were not aligned uniformly and had at least two running directions. Spindle-shaped tenocytes were arranged along the long axis of a plurality of collagen fibres, where two groups of collagen fibrils with oblique directions to each other exhibited an oblique overlap of the two collagen fibril layers. Collagen fibrils with different running directions were observed in separating layers of about 300 nm in thickness and had diameters of 0-200 nm. About 40% of all collagen fibrils had a peak in the range of 20-40 nm. STEM analysis of the same site where the crossing of collagen fibres was observed by transmission electron microscopy demonstrated the outline of collagen fibrils with a clear D-banding pattern at a regular interval. Collagen fibrils were reconstructed three-dimensionally using continuous images acquired by STEM tomography, which confirmed that the collagen fibrils at the crossing sites did not orientate in layers, but were woven one by one. Higher magnification observation of GAG chains attached between the crossing collagen fibrils revealed numerous GAG chains arranged either vertically or obliquely on collagen fibrils. Furthermore, GAG chains at the cross of collagen fibrils connected the closest D-bands. GAG chains are thought to be universally present between collagen fibrils of the tendon. These observations by array and STEM tomographies increase our knowledge of the anatomy in the bifurcation of the bovine hindlimb SDFT and demonstrate the utility of these new imaging technologies.
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Affiliation(s)
- Naoki Takahashi
- Laboratory of Veterinary AnatomySchool of Veterinary MedicineRakuno Gakuen UniversityEbetsuJapan,Present address:
Laboratory of VeterinaryCollege of Bioresource SciencesNihon UniversityFujisawaJapan
| | - Kiyokazu Kametani
- Laboratory of Veterinary AnatomySchool of Veterinary MedicineRakuno Gakuen UniversityEbetsuJapan
| | - Ryo Ota
- Center for Advanced Research of Energy and MaterialsFaculty of EngineeringHokkaido UniversitySapporoJapan
| | - Prasarn Tangkawattana
- Laboratory of Veterinary AnatomySchool of Veterinary MedicineRakuno Gakuen UniversityEbetsuJapan,Faculty of Veterinary MedicineKhon Kaen UniversityKhon KaenThailand
| | - Tomohito Iwasaki
- Department of Food Science and Human WellnessRakuno Gakuen UniversityEbetsuJapan
| | - Yasuhiro Hasegawa
- Department of Food Science and Human WellnessRakuno Gakuen UniversityEbetsuJapan
| | - Hiromi Ueda
- Laboratory of Veterinary AnatomySchool of Veterinary MedicineRakuno Gakuen UniversityEbetsuJapan
| | - Marina Hosotani
- Laboratory of Veterinary AnatomySchool of Veterinary MedicineRakuno Gakuen UniversityEbetsuJapan
| | - Takafumi Watanabe
- Laboratory of Veterinary AnatomySchool of Veterinary MedicineRakuno Gakuen UniversityEbetsuJapan
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16
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Nakajima T, Ikeya M. Development of pluripotent stem cell-based human tenocytes. Dev Growth Differ 2020; 63:38-46. [PMID: 33270251 DOI: 10.1111/dgd.12702] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Revised: 11/17/2020] [Accepted: 11/18/2020] [Indexed: 12/12/2022]
Abstract
Human pluripotent stem cells (PSCs) are used as a platform for therapeutic purposes such as cell transplantation therapy and drug discovery. Another motivation for studying PSCs is to understand human embryogenesis and development. All cell types that make up the body tissues develop through defined trajectories during embryogenesis. For example, paraxial mesoderm is considered to differentiate into several cell types including skeletal muscle cells, chondrocytes, osteocytes, dermal fibroblasts, and tenocytes. Tenocytes are fibroblast cells that constitute the tendon. The step-wise narrowing fate decisions of paraxial mesoderm in the embryo have been modeled in vitro using PSCs; however, deriving tenocytes from human-induced PSCs and their application in cell therapy have long been challenging. PSC-derived tenocytes can be used for a source of cell transplantation to treat a damaged or ruptured tendon due to injury, disorder, or aging. In this review, we discuss the latest research findings on the use of PSCs for studying the biology of tenocyte development and their application in therapeutic settings.
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Affiliation(s)
- Taiki Nakajima
- Department of Clinical Application, Center for iPS Cell Research and Application, Kyoto University, Kyoto, Japan.,Department of Genetics, Harvard Medical School, Boston, Massachusetts, USA.,Department of Pathology, Brigham and Women's Hospital, Boston, Massachusetts, USA
| | - Makoto Ikeya
- Department of Clinical Application, Center for iPS Cell Research and Application, Kyoto University, Kyoto, Japan
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17
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Oh SY, Kim DK, Han SH, Lee HH, Jeong Y, Baek M, Kim H, Ahn W, Lee S. Sustained Exposure of Substance P Causes Tendinopathy. Int J Mol Sci 2020; 21:E8633. [PMID: 33207770 DOI: 10.3390/ijms21228633] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Revised: 11/08/2020] [Accepted: 11/12/2020] [Indexed: 01/09/2023] Open
Abstract
Recently, neuromediators such as substance P (SP) have been found to be important factors in tendon homeostasis. Some studies have found SP to be the cause of inflammation and tendinopathy, whereas others have determined it to be a critical component of tendon healing. As demonstrated by these conflicting findings, the effects of SP on tendinopathy remain unclear. In this study, we hypothesized that the duration of SP exposure determines its effect on the tendons, with repetitive long-term exposure leading to the development of tendinopathy. First, we verified the changes in gene and protein expression using in vitro tenocytes with 10-day exposure to SP. SP and SP + Run groups were injected with SP in their Achilles tendon every other day for 14 days. Achilles tendons were then harvested for biomechanical testing and histological processing. Notably, tendinopathic changes with decreased tensile strength, as observed in the Positive Control, were observed in the Achilles in the SP group compared to the Negative Control. Subsequent histological analysis, including Alcian blue staining, also revealed alterations in the Achilles tendon, which were generally consistent with the findings of tendinopathy in SP and SP + Run groups. Immunohistochemical analysis revealed increased expression of SP in the SP group, similar to the Positive Control. In general, the SP + Run group showed worse tendinopathic changes. These results suggest that sustained exposure to SP may be involved in the development of tendinopathy. Future research on inhibiting SP is warranted to target SP in the treatment of tendinopathy and may be beneficial to patients with tendinopathy.
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18
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De Micheli AJ, Swanson JB, Disser NP, Martinez LM, Walker NR, Oliver DJ, Cosgrove BD, Mendias CL. Single-cell transcriptomic analysis identifies extensive heterogeneity in the cellular composition of mouse Achilles tendons. Am J Physiol Cell Physiol 2020; 319:C885-C894. [PMID: 32877217 DOI: 10.1152/ajpcell.00372.2020] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Tendon is a dense connective tissue that stores and transmits forces between muscles and bones. Cellular heterogeneity is increasingly recognized as an important factor in the biological basis of tissue homeostasis and disease, yet little is known about the diversity of cell types that populate tendon. To address this, we determined the heterogeneity of cell populations within mouse Achilles tendons using single-cell RNA sequencing. In assembling a transcriptomic atlas of Achilles tendons, we identified 11 distinct types of cells, including three previously undescribed populations of tendon fibroblasts. Prior studies have indicated that pericytes, which are found in the vasculature of tendons, could serve as a potential source of progenitor cells for adult tendon fibroblasts. Using trajectory inference analysis, we provide additional support for the notion that pericytes are likely to be at least one of the progenitor cell populations for the fibroblasts that compose adult tendons. We also modeled cell-cell interactions and identified previously undescribed ligand-receptor signaling interactions involved in tendon homeostasis. Our novel and interactive tendon atlas highlights previously underappreciated heterogeneity between and within tendon cell populations. The atlas also serves as a resource to further the understanding of tendon extracellular matrix assembly and maintenance and in the design of therapies for tendinopathies.
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Affiliation(s)
- Andrea J De Micheli
- Hospital for Special Surgery, New York, New York.,Meinig School of Biomedical Engineering, Cornell University, Ithaca, New York
| | | | | | | | - Nicholas R Walker
- Hospital for Special Surgery, New York, New York.,Department of Physiology and Biophysics, Weill Cornell Medical College, New York, New York
| | | | - Benjamin D Cosgrove
- Meinig School of Biomedical Engineering, Cornell University, Ithaca, New York
| | - Christopher L Mendias
- Hospital for Special Surgery, New York, New York.,Department of Physiology and Biophysics, Weill Cornell Medical College, New York, New York
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19
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Qi J, Liu Q, Reisdorf RL, Boroumand S, Behfar A, Moran SL, Amadio PC, Gingery A, Zhao C. Characterization of a purified exosome product and its effects on canine flexor tenocyte biology. J Orthop Res 2020; 38:1845-1855. [PMID: 31930553 DOI: 10.1002/jor.24587] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Accepted: 12/21/2019] [Indexed: 02/04/2023]
Abstract
Flexor tendon injuries and tendinopathy are very common but remain challenging in clinical treatment. Exosomes-based cell-free therapy appears to be a promising strategy for tendon healing, while limited studies have evaluated its impacts on tenocyte biology. The objective of this study was to characterize a novel purified exosome product (PEP) derived from plasma, as well as to explore its cellular effects on canine tenocyte biology. The transmission electron microscope revealed that exosomes of PEP present cup-shaped structures with the diameters ranged from 80 to 141 nm, and the NanoSight report presented that their size mainly concentrated around 100 nm. The enzyme-linked immunosorbent assay kits analysis showed that PEP was positive for CD63 and AChE expression, and the cellular uptake of exosomes internalized into tenocyte cytoplasm was observed. The cell growth assays displayed that tenocyte proliferation ability was enhanced by PEP solution in a dose-dependent manner. Tenogenic phenotype was preserved as is evident by that tendon-related genes expression (SCX, COL1A, COL3A1, TNMD, DCN, and MKX) were expressed insistently in a high level, while tenocytes were treated with 5% PEP solution. Furthermore, migration capability was maintained and total collagen deposition was increased. More interesting, dexamethasone-induced cellular apoptosis was attenuated during the incubation of tenocytes with a 5% PEP solution. These findings will provide the basic understandings about the PEP, and support the potential use of this biological strategy for tendon healing.
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Affiliation(s)
- Jun Qi
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota.,Department of Orthopedics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Qian Liu
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota.,Department of Orthopedics, The Second Xiangya Hospital, Central South University, Changsha, China
| | | | - Soulmaz Boroumand
- Division of Cardiovascular Diseases and Center for Regenerative Medicine, Mayo Clinic, Rochester, Minnesota
| | - Atta Behfar
- Division of Cardiovascular Diseases and Center for Regenerative Medicine, Mayo Clinic, Rochester, Minnesota
| | - Steven L Moran
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota
| | - Peter C Amadio
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota
| | - Anne Gingery
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota
| | - Chunfeng Zhao
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota
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20
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Hadate S, Takahashi N, Kametani K, Iwasaki T, Hasega Y, Tangkawattana P, Kawasaki T, Ueda H, Hosotani M, Watanabe T. Ultrastructural study of the three-dimensional tenocyte network in newly hatched chick Achilles tendons using serial block face-scanning electron microscopy. J Vet Med Sci 2020; 82:948-954. [PMID: 32418945 PMCID: PMC7399303 DOI: 10.1292/jvms.20-0120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The lateral cytoplasmic processes of tenocytes extend to form three-dimensional network surrounding collagen fibers. It is unknown whether connections between two cytoplasmic
processes involve overlapping of the processes or merely surface contact. In this study, the two-dimensional and three-dimensional structure of tenocytes in the Achilles tendons of
the newly hatched chicks were studied using transmission electron microscopy and serial block face-scanning electron microscopy. Observation of the two-dimensional structures
revealed various forms of cellular connections, including connections between the cytoplasmic processes of adjacent tenocytes and between the cytoplasmic process of tenocytes and
fibroblasts. Three-dimensional observation showed spike-like cytoplasmic processes extending from one tenocyte that interlocked with cytoplasmic processes from other tenocytes.
Cytoplasmic processes from each tenocyte within the chick tendons interlocked to ensure a tight cell-to-cell connection around growing collagen fibers. A cellular network formed by
these cytoplasmic processes surrounds each collagen fiber. Cell-cell junctions, which were suggested to be gap junctions, observed at sites of cytoplasmic process overlap most
likely represent the major route for communication between tenocytes associated with fibroblasts, enabling vital signals important for maintaining the cell and tendon integrity to
be transmitted.
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Affiliation(s)
- Shu Hadate
- Laboratory of Veterinary Anatomy, School of Veterinary Medicine, Rakuno Gakuen University, Ebetsu, Hokkaido 069-8501, Japan
| | - Naoki Takahashi
- Laboratory of Veterinary Anatomy, School of Veterinary Medicine, Rakuno Gakuen University, Ebetsu, Hokkaido 069-8501, Japan
| | - Kiyokazu Kametani
- Laboratory of Veterinary Anatomy, School of Veterinary Medicine, Rakuno Gakuen University, Ebetsu, Hokkaido 069-8501, Japan
| | - Tomohito Iwasaki
- Department of Food Science and Human Wellness, Rakuno Gakuen University, Ebetsu, Hokkaido 069-8501, Japan
| | - Yasuhiro Hasega
- Department of Food Science and Human Wellness, Rakuno Gakuen University, Ebetsu, Hokkaido 069-8501, Japan
| | | | - Takeshi Kawasaki
- Research Office Concerning the Health of Humans and Birds, Abashiri, Hokkaido 099-3119, Japan
| | - Hiromi Ueda
- Laboratory of Veterinary Anatomy, School of Veterinary Medicine, Rakuno Gakuen University, Ebetsu, Hokkaido 069-8501, Japan
| | - Marina Hosotani
- Laboratory of Veterinary Anatomy, School of Veterinary Medicine, Rakuno Gakuen University, Ebetsu, Hokkaido 069-8501, Japan
| | - Takafumi Watanabe
- Laboratory of Veterinary Anatomy, School of Veterinary Medicine, Rakuno Gakuen University, Ebetsu, Hokkaido 069-8501, Japan
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21
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Disser NP, Ghahramani GC, Swanson JB, Wada S, Chao ML, Rodeo SA, Oliver DJ, Mendias CL. Widespread diversity in the transcriptomes of functionally divergent limb tendons. J Physiol 2020; 598:1537-1550. [PMID: 32083717 DOI: 10.1113/jp279646] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Accepted: 02/20/2020] [Indexed: 12/23/2022] Open
Abstract
KEY POINTS Tendon is a hypocellular, matrix-rich tissue that has been excluded from comparative transcriptional atlases. These atlases have provided important knowledge about biological heterogeneity between tissues, and our study addresses this important gap. We performed measures on four of the most studied tendons, the Achilles, forepaw flexor, patellar and supraspinatus tendons of both mice and rats. These tendons are functionally distinct and are also among the most commonly injured, and therefore of important translational interest. Approximately one-third of the filtered transcriptome was differentially regulated between Achilles, forepaw flexor, patellar and supraspinatus tendons within either mice or rats. Nearly two-thirds of the transcripts that are expressed in anatomically similar tendons were different between mice and rats. The overall findings from this study identified that although tendons across the body share a common anatomical definition based on their physical location between skeletal muscle and bone, tendon is a surprisingly genetically heterogeneous tissue. ABSTRACT Tendon is a functionally important connective tissue that transmits force between skeletal muscle and bone. Previous studies have evaluated the architectural designs and mechanical properties of different tendons throughout the body. However, less is known about the underlying transcriptional differences between tendons that may dictate their designs and properties. Therefore, our objective was to develop a comprehensive atlas of the transcriptome of limb tendons in adult mice and rats using systems biology techniques. We selected the Achilles, forepaw digit flexor, patellar, and supraspinatus tendons due to their divergent functions and high rates of injury and tendinopathies in patients. Using RNA sequencing data, we generated the Comparative Tendon Transcriptional Database (CTTDb) that identified substantial diversity in the transcriptomes of tendons both within and across species. Approximately 30% of filtered transcripts were differentially regulated between tendons of a given species, and nearly 60% of the filtered transcripts present in anatomically similar tendons were different between species. Many of the genes that differed between tendons and across species are important in tissue specification and limb morphogenesis, tendon cell biology and tenogenesis, growth factor signalling, and production and maintenance of the extracellular matrix. This study indicates that tendon is a surprisingly heterogenous tissue with substantial genetic variation based on anatomical location and species.
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Affiliation(s)
| | - Gregory C Ghahramani
- Hospital for Special Surgery, New York, NY, USA.,Department of Physiology and Biophysics, Weill Cornell Medical College, New York, NY, USA
| | | | - Susumu Wada
- Hospital for Special Surgery, New York, NY, USA
| | - Max L Chao
- Hospital for Special Surgery, New York, NY, USA
| | | | | | - Christopher L Mendias
- Hospital for Special Surgery, New York, NY, USA.,Department of Physiology and Biophysics, Weill Cornell Medical College, New York, NY, USA
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22
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Kubo Y, Hoffmann B, Goltz K, Schnakenberg U, Jahr H, Merkel R, Schulze-Tanzil G, Pufe T, Tohidnezhad M. Different Frequency of Cyclic Tensile Strain Relates to Anabolic/Catabolic Conditions Consistent with Immunohistochemical Staining Intensity in Tenocytes. Int J Mol Sci 2020; 21:E1082. [PMID: 32041254 DOI: 10.3390/ijms21031082] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Revised: 01/24/2020] [Accepted: 02/02/2020] [Indexed: 01/13/2023] Open
Abstract
Tenocytes are mechanosensitive cells intimately adapting their expression profile and hence, their phenotype to their respective mechanomilieu. The immunolocalization and expression intensity of tenogenic, anabolic and catabolic markers in tenocytes in response to in vitro mechanical loading have not been monitored by immunohistochemical staining (IHC). Thus, we investigated the association between IHC intensities, different stimulation frequencies, and tenogenic metabolism using a versatile mechanical stretcher. Primary tenocytes obtained from murine Achilles tendons were transferred to poly(dimethylsiloxane) (PDMS) elastomeric chamber. Chambers were cyclically stretched by 5% in uniaxial direction at a variation of tensile frequency (1 or 2 Hz) for 3 h. After stretching, cell physiology, IHC intensities of tendon-related markers, and protein level of the angiogenesis marker vascular endothelial growth factor (VEGF) were evaluated. Cell proliferation in tenocytes stimulated with 1 Hz stretch was significantly higher than with 2 Hz or without stretch, while 2 Hz stretch induced significantly reduced cell viability and proliferation with microscopically detectable apoptotic cell changes. The amount of scleraxis translocated into the nuclei and tenomodulin immunoreactivity of tenocytes treated with stretch were significantly higher than of non-stretched cells. The collagen type-1 expression level in tenocytes stretched at 1 Hz was significantly higher than in those cultivated with 2 Hz or without stretching, whereas the matrix metalloproteinase (MMP)-1 and MMP-13 immunoreactivities of cells stretched at 2 Hz were significantly higher than in those stimulated with 1 Hz or without stretching. The secreted VEGF-protein level of tenocytes stretched at 2 Hz was significantly higher than without stretching. Our IHC findings consistent with cell physiology suggest that appropriate stretching can reproduce in vitro short-term tenogenic anabolic/catabolic conditions and allow us to identify an anabolic stretching profile.
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23
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Taye N, Karoulias SZ, Hubmacher D. The "other" 15-40%: The Role of Non-Collagenous Extracellular Matrix Proteins and Minor Collagens in Tendon. J Orthop Res 2020; 38:23-35. [PMID: 31410892 PMCID: PMC6917864 DOI: 10.1002/jor.24440] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Accepted: 08/02/2019] [Indexed: 02/04/2023]
Abstract
Extracellular matrix (ECM) determines the physiological function of all tissues, including musculoskeletal tissues. In tendon, ECM provides overall tissue architecture, which is tailored to match the biomechanical requirements of their physiological function, that is, force transmission from muscle to bone. Tendon ECM also constitutes the microenvironment that allows tendon-resident cells to maintain their phenotype and that transmits biomechanical forces from the macro-level to the micro-level. The structure and function of adult tendons is largely determined by the hierarchical organization of collagen type I fibrils. However, non-collagenous ECM proteins such as small leucine-rich proteoglycans (SLRPs), ADAMTS proteases, and cross-linking enzymes play critical roles in collagen fibrillogenesis and guide the hierarchical bundling of collagen fibrils into tendon fascicles. Other non-collagenous ECM proteins such as the less abundant collagens, fibrillins, or elastin, contribute to tendon formation or determine some of their biomechanical properties. The interfascicular matrix or endotenon and the outer layer of tendons, the epi- and paratenon, includes collagens and non-collagenous ECM proteins, but their function is less well understood. The ECM proteins in the epi- and paratenon may provide the appropriate microenvironment to maintain the identity of distinct tendon cell populations that are thought to play a role during repair processes after injury. The aim of this review is to provide an overview of the role of non-collagenous ECM proteins and less abundant collagens in tendon development and homeostasis. © 2019 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 38:23-35, 2020.
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Affiliation(s)
- Nandaraj Taye
- Leni & Peter W. May Department of Orthopaedics, Orthopaedic Research LaboratoriesIcahn School of Medicine at Mt. SinaiNew York New York 10029
| | - Stylianos Z. Karoulias
- Leni & Peter W. May Department of Orthopaedics, Orthopaedic Research LaboratoriesIcahn School of Medicine at Mt. SinaiNew York New York 10029
| | - Dirk Hubmacher
- Leni & Peter W. May Department of Orthopaedics, Orthopaedic Research LaboratoriesIcahn School of Medicine at Mt. SinaiNew York New York 10029
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24
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Abstract
Purpose of the Study: The incidence of tendon injuries increases dramatically with age, which presents a major clinical burden. While previous studies have sought to identify age-related changes in extracellular matrix structure and function, few have been able to explain fully why aged tissues are more prone to degeneration and injury. In addition, recent studies have also demonstrated that age-related processes in humans may be sex-dependent, which could be responsible for muddled conclusions in changes with age. In this study, we investigate short-term responses through an ex vivo explant culture model of stress deprivation that specifically questions how age and sex differentially affect the ability of tendons to respond to altered mechanical stimulus.Materials and Methods: We subjected murine flexor explants from young (4 months of age) and aged (22-24 months of age) male and female mice to stress-deprived culture conditions for up to 1 week and investigated changes in viability, cell metabolism and proliferation, matrix biosynthesis and composition, gene expression, and inflammatory responses throughout the culture period.Results and Conclusions: We found that aging did have a significant influence on the response to stress deprivation, demonstrating that aged explants have a less robust response overall with reduced metabolic activity, viability, proliferation, and biosynthesis. However, age-related changes appeared to be sex-dependent. Together, this work demonstrates that the aging process and the subsequent effect of age on the ability of tendons to respond to stress-deprivation are inherently different based on sex, where male explants favor increased activity, apoptosis, and matrix remodeling while female explants favor reduced activity and tissue preservation.
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Affiliation(s)
- Brianne K. Connizzo
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, United States,Correspondence: Brianne K. Connizzo, 70 Massachusetts Avenue, NE47-377, Cambridge, MA 02139, T: 617-253-2469,
| | - Judith M. Piet
- Department of Bioengineering, Northeastern University, Boston, MA 02115, United States
| | - Sandra J. Shefelbine
- Department of Bioengineering, Northeastern University, Boston, MA 02115, United States,Department of Mechanical and Industrial Engineering, Northeastern University, Boston, MA 02115, United States
| | - Alan J. Grodzinsky
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, United States,Center for Biomedical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, United States,Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA 02139, United States,Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, United States
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25
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Min K, Lee JM, Kim MJ, Jung SY, Kim KS, Lee S, Choi YS. Restoration of Cellular Proliferation and Characteristics of Human Tenocytes by Vitamin D. J Orthop Res 2019; 37:2241-2248. [PMID: 31115927 DOI: 10.1002/jor.24352] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Accepted: 05/14/2019] [Indexed: 02/04/2023]
Abstract
Vitamin D (Vit D) increases calcium absorption in the intestine after binding to the Vit D receptor (VDR). The VDR has also been identified in muscle cells. Vit D supplementation resulted in improved muscle strength. However, there is a paucity of studies of the role of Vit D on tenocytes. We investigated the effects of Vit D on damaged tenocytes. Human tenocytes were treated with dexamethasone (Dex) to induce cell injury. Expression of the tenocyte-related markers tenomodulin (Tnmd), tenascin C (Tnc), scleraxis (Scx), mohawk (Mkx), and collagen (Col) 1 and 3 were measured. Then, tenocytes were cotreated with Vit D. 1-α-Hydroxylase and VDR were explored in tenocytes. With 10 μM Dex, the growth of tenocytes was significantly inhibited, and the gene expression of Tnmd, Tnc, Scx, Mkx, Col 1 and 3 also decreased. When tenocytes were cotreated with Vit D, cell proliferation recovered in a dose-dependent manner, and the expression of TNMD and Col 1 improved. When studying the mechanisms of the effects of Vit D on tenocytes, reactive oxygen species produced by Dex decreased with Vit D, and the phosphorylation of extracellular signal-regulated kinase and p38 was stimulated by Vit D cotreatment. 1-α-Hydroxylase and VDR were found in tenocytes, indicating that the cells have the ability to use an inactive form of Vit D and interact with it. Vit D is known to perform diverse actions and its protective effects on tenocytes suggest its beneficial role in tendon in addition to muscle and bone. © 2019 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 37:2241-2248, 2019.
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Affiliation(s)
- Kyunghoon Min
- Department of Rehabilitation Medicine, CHA Bundang Medical Center, CHA University School of Medicine, Seongnam, Republic of Korea
| | - Ji Min Lee
- Department of Biotechnology, CHA University, Seongnam, 13488, Republic of Korea
| | - Mi Jin Kim
- Department of Biotechnology, CHA University, Seongnam, 13488, Republic of Korea
| | - Sang Youn Jung
- Department of Internal Medicine, Division of Rheumatology, CHA Bundang Medical Center, CHA University School of Medicine, Seongnam, Republic of Korea
| | - Kyung-Soo Kim
- Department of Internal Medicine, Division of Endocrinology and Metabolism, CHA Bundang Medical Center, CHA University School of Medicine, Seongnam, Republic of Korea
| | - Soonchul Lee
- Department of Orthopaedic Surgery, CHA Bundang Medical Center, CHA University School of Medicine, Seongnam, Republic of Korea
| | - Yong-Soo Choi
- Department of Biotechnology, CHA University, Seongnam, 13488, Republic of Korea
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26
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Ragni E, Perucca Orfei C, Bowles AC, de Girolamo L, Correa D. Reliable Reference Genes for Gene Expression Assessment in Tendon-Derived Cells under Inflammatory and Pro-Fibrotic/Healing Stimuli. Cells 2019; 8:E1188. [PMID: 31581587 DOI: 10.3390/cells8101188] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Revised: 09/26/2019] [Accepted: 09/27/2019] [Indexed: 01/04/2023] Open
Abstract
Tendon cells (TCs) are important for homeostatic maintenance in the healthy tendon and to promote tissue healing after injury. Further, resident and rare populations of tendon stem/progenitor cells, located at various sites within the tendon, contribute to tendon recovery by differentiating into repairing TCs. Gene expression analysis, through quantitative reverse-transcription polymerase chain reaction (qRT-PCR), constitutes a useful tool to study cellular responses, including the transition from initial inflammation to healing processes. A critical step required for data normalization is the choice of reliable reference genes (RGs), a process highly underestimated in tendon biology. In this study, the suitability of five commonly used RGs (ACTB, B2M, GAPDH, HPRT1, and RPLP0) was evaluated using TCs samples cultured in both standard and progenitor-enriching conditions, as well as under either inflammatory (IFNγ + TNFα) or pro-fibrotic/healing (CTGF) stimulation. The stability of the candidate RGs was computationally determined using NormFinder, geNorm, BestKeeper, and DeltaCt applets. Overall, ACTB resulted as the most stable RG on the basis of the integration of each gene weight, whereas B2M and RPLP0 performed poorly. To further validate ACTB’s optimal performance, we evaluated the expression of ICAM1, coding for an immune-related cell surface glycoprotein, and COL1A1, encoding collagen type I that is the main component of the tendon extracellular matrix (ECM), both known to be modulated by inflammation. The expression of both genes was heavily affected by the RGs used. Consequently, when analyzing gene expression in tendon-derived cells subjected to various stimulatory protocols, the use of a suitable RG should be considered carefully. On the basis of our results, ACTB can be reliably used when analyzing different TC types exposed to pathological conditions.
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27
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Barin FR, de Sousa Neto IV, Vieira Ramos G, Szojka A, Ruivo AL, Anflor CTM, Agualimpia JDH, Domingues AC, Franco OL, Adesida AB, Durigan JLQ, Marqueti RDC. Calcaneal Tendon Plasticity Following Gastrocnemius Muscle Injury in Rat. Front Physiol 2019; 10:1098. [PMID: 31551799 PMCID: PMC6733963 DOI: 10.3389/fphys.2019.01098] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2019] [Accepted: 08/08/2019] [Indexed: 01/01/2023] Open
Abstract
Cross-talk between skeletal muscle and tendon is important for tissue homeostasis. Whereas the skeletal muscle response to tendon injury has been well-studied, to the best of our knowledge the tendon response to skeletal muscle injury has been neglected. Thus, we investigated calcaneal tendon extracellular matrix (ECM) remodeling after gastrocnemius muscle injury using a rat model. Wistar rats were randomly divided into four groups: control group (C; animals that were not exposed to muscle injury) and harvested at different time points post gastrocnemius muscle injury (3, 14, and 28 days) for gene expression, morphological, and biomechanical analyses. At 3 days post injury, we observed mRNA-level dysregulation of signaling pathways associated with collagen I accompanied with disrupted biomechanical properties. At 14 days post injury, we found reduced collagen content histologically accompanied by invasion of blood vessels into the tendon proper and an abundance of peritendinous sheath cells. Finally, at 28 days post injury, there were signs of recovery at the gene expression level including upregulation of transcription factors related to ECM synthesis, remodeling, and repair. At this time point, tendons also presented with increased peritendinous sheath cells, decreased adipose cells, higher Young’s modulus, and lower strain to failure compared to the uninjured controls and all post injury time points. In summary, we demonstrate that the calcaneal tendon undergoes extensive ECM remodeling in response to gastrocnemius muscle injury leading to altered functional properties in a rat model. Tendon plasticity in response to skeletal muscle injury merits further investigation to understand its physiological relevance and potential clinical implications.
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Affiliation(s)
| | | | - Graciele Vieira Ramos
- Universidade Paulista, Brasilia, Brazil.,Centro Universitário ICESP, Brasilia, Brazil
| | - Alexander Szojka
- Division of Orthopaedic Surgery, University of Alberta, Edmonton, AB, Canada.,Division of Surgical Research, University of Alberta, Edmonton, AB, Canada
| | | | | | | | - Allan Corrêa Domingues
- Group of Experimental and Computational Mechanics, Universidade de Brasília, Brasília, Brazil
| | - Octávio Luiz Franco
- S-Inova Biotech, Universidade Catolica Dom Bosco, Campo Grande, Brazil.,Centro de Análises Proteômicas e Bioquímicas, Universidade Católica de Brasília, Brasília, Brazil
| | - Adetola B Adesida
- Division of Orthopaedic Surgery, University of Alberta, Edmonton, AB, Canada.,Division of Surgical Research, University of Alberta, Edmonton, AB, Canada
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28
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McBeath R, Edwards RW, O’Hara BJ, Maltenfort MG, Parks SM, Steplewski A, Osterman AL, Shapiro IM. Tendinosis develops from age- and oxygen tension-dependent modulation of Rac1 activity. Aging Cell 2019; 18:e12934. [PMID: 30938056 PMCID: PMC6516173 DOI: 10.1111/acel.12934] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2018] [Revised: 01/16/2019] [Accepted: 02/07/2019] [Indexed: 12/20/2022] Open
Abstract
Age‐related tendon degeneration (tendinosis) is characterized by a phenotypic change in which tenocytes display characteristics of fibrochondrocytes and mineralized fibrochondrocytes. As tendon degeneration has been noted in vivo in areas of decreased tendon vascularity, we hypothesized that hypoxia is responsible for the development of the tendinosis phenotype, and that these effects are more pronounced in aged tenocytes. Hypoxic (1% O2) culture of aged, tendinotic, and young human tenocytes resulted in a mineralized fibrochondrocyte phenotype in aged tenocytes, and a fibrochondrocyte phenotype in young and tendinotic tenocytes. Investigation of the molecular mechanism responsible for this phenotype change revealed that the fibrochondrocyte phenotype in aged tenocytes occurs with decreased Rac1 activity in response to hypoxia. In young hypoxic tenocytes, however, the fibrochondrocyte phenotype occurs with concomitant decreased Rac1 activity coupled with increased RhoA activity. Using pharmacologic and adenoviral manipulation, we confirmed that these hypoxic effects on the tenocyte phenotype are linked directly to the activity of RhoA/Rac1 GTPase in in vitro human cell culture and tendon explants. These results demonstrate that hypoxia drives tenocyte phenotypic changes, and provide a molecular insight into the development of human tendinosis that occurs with aging.
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Affiliation(s)
- Rowena McBeath
- Department of Orthopaedic SurgeryThomas Jefferson UniversityPhiladelphiaPennsylvania
- Division of Orthopaedic Research, Department of Orthopaedic SurgeryThomas Jefferson UniversityPhiladelphiaPennsylvania
- Philadelphia Hand to Shoulder CenterPhiladelphiaPennsylvania
| | - Richard W. Edwards
- Division of Orthopaedic Research, Department of Orthopaedic SurgeryThomas Jefferson UniversityPhiladelphiaPennsylvania
| | - Brian J. O’Hara
- Department of Pathology, Anatomy and Cell BiologyThomas Jefferson University HospitalPhiladelphiaPennsylvania
| | - Mitchell G. Maltenfort
- The Applied Clinical Research Center, Department of Biomedical and Health InformaticsChildren's Hospital of PhiladelphiaPhiladelphiaPennsylvania
| | - Susan M. Parks
- Division of Geriatric Medicine & Palliative Care, Department of Family & Community MedicineThomas Jefferson UniversityPhiladelphiaPennsylvania
| | - Andrzej Steplewski
- Division of Orthopaedic Research, Department of Orthopaedic SurgeryThomas Jefferson UniversityPhiladelphiaPennsylvania
| | - A. Lee Osterman
- Department of Orthopaedic SurgeryThomas Jefferson UniversityPhiladelphiaPennsylvania
- Philadelphia Hand to Shoulder CenterPhiladelphiaPennsylvania
| | - Irving M. Shapiro
- Division of Orthopaedic Research, Department of Orthopaedic SurgeryThomas Jefferson UniversityPhiladelphiaPennsylvania
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29
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Best KT, Loiselle AE. Scleraxis lineage cells contribute to organized bridging tissue during tendon healing and identify a subpopulation of resident tendon cells. FASEB J 2019; 33:8578-8587. [PMID: 30951381 DOI: 10.1096/fj.201900130rr] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
During tendon healing, it is postulated that tendon cells drive tissue regeneration, whereas extrinsic cells drive pathologic scar formation. Tendon cells are frequently described as a homogenous, fibroblast population that is positive for the marker Scleraxis (Scx). It is controversial whether tendon cells localize within the forming scar tissue during adult tendon healing. We have previously demonstrated that S100 calcium-binding protein A4 (S100a4) is a driver of tendon scar formation and marks a subset of tendon cells. The relationship between Scx and S100a4 has not been explored. In this study, we assessed the localization of Scx lineage cells (ScxLin) following adult murine flexor tendon repair and established the relationship between Scx and S100a4 throughout both homeostasis and healing. We showed that adult ScxLin localize within the scar tissue and organize into a cellular bridge during tendon healing. Additionally, we demonstrate that markers Scx and S100a4 label distinct populations in tendon during homeostasis and healing, with Scx found in the organized bridging tissue and S100a4 localized throughout the entire scar region. These studies define a heterogeneous tendon cell environment and demonstrate discrete contributions of subpopulations during healing. These data enhance our understanding and ability to target the cellular environment of the tendon.-Best, K. T., Loiselle, A. E. Scleraxis lineage cells contribute to organized bridging tissue during tendon healing and identify a subpopulation of resident tendon cells.
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Affiliation(s)
- Katherine T Best
- Center for Musculoskeletal Research, Department of Orthopaedics and Rehabilitation, University of Rochester Medical Center, Rochester, New York, USA
| | - Alayna E Loiselle
- Center for Musculoskeletal Research, Department of Orthopaedics and Rehabilitation, University of Rochester Medical Center, Rochester, New York, USA
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30
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Abstract
The force generated by muscles leads to signaling that helps to shape nearby tendon precursor cells.
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Affiliation(s)
- Nicole O Glenn
- Department of Hematology, St. Jude Children's Research Hospital, Memphis, United States
| | - Clarissa A Henry
- School of Biology and Ecology, University of Maine, Orono, United States.,Graduate School for Biomedical Sciences and Engineering, University of Maine, Orono, United States
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31
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Kim W, Lee SK, Kwon YW, Chung SG, Kim S. Pioglitazone-Primed Mesenchymal Stem Cells Stimulate Cell Proliferation, Collagen Synthesis and Matrix Gene Expression in Tenocytes. Int J Mol Sci 2019; 20:ijms20030472. [PMID: 30678291 PMCID: PMC6387004 DOI: 10.3390/ijms20030472] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2018] [Revised: 01/17/2019] [Accepted: 01/19/2019] [Indexed: 11/16/2022] Open
Abstract
Various therapeutic effects of mesenchymal stem cells (MSCs) have been reported. However, the rapid clearance of these cells in vivo, difficulties in identifying their therapeutic mechanism of action, and insufficient production levels remain to be resolved. We investigated whether a pioglitazone pre-treatment of MSCs (Pio-MSCs) would stimulate the proliferation of co-cultured tenocytes. Pioglitazone increased the proliferation of MSCs and enhanced the secretion of VEGF (vascular endothelial growth factor) and collagen in these cells. We then examined the effects of Pio-MSCs on tenocytes using an indirect transwell culture system. A significant increase in tenocyte proliferation and cell cycle progression was observed in these co-cultures. Significant increases were observed in wound scratch closure by tenocytes from a Pio-MSC co-culture. Pio-MSCs also enhanced the secretion of collagen from tenocytes. A higher mRNA level of collagen type 1 (Col 1) and type 3 (Col 3), scleraxis (Scx), and tenascin C (TnC) was found in the tenocytes in Pio-MSC co-cultures compared with monocultured cells or tenocytes cultured with non-treated MSCs. Our results indicate that pioglitazone enhances the therapeutic effects of MSCs on tendon repair.
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Affiliation(s)
- Won Kim
- Department of Rehabilitation Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul 05505, Korea.
- Department of Rehabilitation Medicine, College of Medicine, Seoul National University, 101 Daehak-ro, Jongno-gu, Seoul 03080, Korea.
| | - Seul Ki Lee
- Stem Cell Center, Asan Institute for Life Science, Asan Medical Center, Seoul 05505, Korea.
| | - Young-Won Kwon
- Department of Rehabilitation Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul 05505, Korea.
| | - Sun G Chung
- Department of Rehabilitation Medicine, College of Medicine, Seoul National University, 101 Daehak-ro, Jongno-gu, Seoul 03080, Korea.
- Institute of Aging, Seoul National University, Seoul 03080, Korea.
- Rheumatism Research Institute, Medical Research Center, Seoul National University, Seoul 03080, Korea.
| | - Soo Kim
- Stem Cell Center, Asan Institute for Life Science, Asan Medical Center, Seoul 05505, Korea.
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32
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Subramanian A, Kanzaki LF, Galloway JL, Schilling TF. Mechanical force regulates tendon extracellular matrix organization and tenocyte morphogenesis through TGFbeta signaling. eLife 2018; 7:e38069. [PMID: 30475205 PMCID: PMC6345564 DOI: 10.7554/elife.38069] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Accepted: 11/26/2018] [Indexed: 12/28/2022] Open
Abstract
Mechanical forces between cells and extracellular matrix (ECM) influence cell shape and function. Tendons are ECM-rich tissues connecting muscles with bones that bear extreme tensional force. Analysis of transgenic zebrafish expressing mCherry driven by the tendon determinant scleraxis reveals that tendon fibroblasts (tenocytes) extend arrays of microtubule-rich projections at the onset of muscle contraction. In the trunk, these form a dense curtain along the myotendinous junctions at somite boundaries, perpendicular to myofibers, suggesting a role as force sensors to control ECM production and tendon strength. Paralysis or destabilization of microtubules reduces projection length and surrounding ECM, both of which are rescued by muscle stimulation. Paralysis also reduces SMAD3 phosphorylation in tenocytes and chemical inhibition of TGFβ signaling shortens tenocyte projections. These results suggest that TGFβ, released in response to force, acts on tenocytes to alter their morphology and ECM production, revealing a feedback mechanism by which tendons adapt to tension.
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Affiliation(s)
- Arul Subramanian
- Department of Developmental and Cell BiologyUniversity of California, IrvineIrvineUnited States
| | - Lauren Fallon Kanzaki
- Department of Developmental and Cell BiologyUniversity of California, IrvineIrvineUnited States
| | - Jenna Lauren Galloway
- Center for Regenerative Medicine, Department of Orthopaedic SurgeryMassachusetts General Hospital, Harvard Stem Cell InstituteBostonUnited States
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Dubin JA, Greenberg DR, Iglinski-Benjamin KC, Abrams GD. Effect of micro-RNA on tenocytes and tendon-related gene expression: A systematic review. J Orthop Res 2018; 36:2823-2829. [PMID: 29873411 DOI: 10.1002/jor.24064] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Accepted: 05/21/2018] [Indexed: 02/04/2023]
Abstract
The purpose of the review was to synthesize the current literature regarding the effect of miRNA on biological processes known to be involved in tendon and tenocyte development and homeostasis. Using multiple databases, a systematic review was performed with a customized search term crafted to identify any study examining micro-RNA in relation to tendon and/or tenocytes. Results were classified based on the following categories: Gene expression, tenocyte development and differentiation, tendon tissue repair, and tenocyte senescence. A total of 3,112 potentially relevant studies were reviewed, and after exclusion criteria was applied, 15 investigations were included in the final analysis. There were 14 specific miRNA included in this review, with 11 studies reporting on tendon-related gene expression, five reporting on tendon development and/or tenocyte differentiation, six reporting on tendon tissue repair, and five reporting on tenocyte senescence. The miR-29 family was the most commonly reported micro-RNA in the investigation. We also report on a number of micro-RNA which are associated with both positive and negative effects on tendon homeostasis. © 2018 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 36:2823-2829, 2018.
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Affiliation(s)
- Jeremy A Dubin
- Veterans Administration-Palo Alto, Palo Alto, California
| | - Daniel R Greenberg
- Department of Orthopedic Surgery, Stanford University School of Medicine, 341 Galvez Street Mail Code 6175, Stanford, California
| | - Kag C Iglinski-Benjamin
- Veterans Administration-Palo Alto, Palo Alto, California.,Department of Orthopedic Surgery, Stanford University School of Medicine, 341 Galvez Street Mail Code 6175, Stanford, California
| | - Geoffrey D Abrams
- Veterans Administration-Palo Alto, Palo Alto, California.,Department of Orthopedic Surgery, Stanford University School of Medicine, 341 Galvez Street Mail Code 6175, Stanford, California
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Raimondi MT, Laganà M, Conci C, Crestani M, Di Giancamillo A, Gervaso F, Deponti D, Boschetti F, Nava MM, Scandone C, Domeneghini C, Sannino A, Peretti GM. Development and biological validation of a cyclic stretch culture system for the ex vivo engineering of tendons. Int J Artif Organs 2018; 41:400-412. [PMID: 29781355 DOI: 10.1177/0391398818774496] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
INTRODUCTION An innovative approach to the treatment of tendon injury or degeneration is given by engineered grafts, made available through the development of bioreactors that generate tendon tissue in vitro, by replicating in vivo conditions. This work aims at the design of a bioreactor capable of applying a stimulation of cyclic strain on cell constructs to promote the production of bioartificial tissue with mechanical and biochemical properties resembling those of the native tissue. METHODS The system was actuated by an electromagnet and design specifications were imposed as follows. The stimulation protocol provides to scaffolds a 3% preload, a 10% deformation, and a stimulation frequency rate set at 0.5, 1, and 2 Hz, which alternates stimulation/resting phases. Porcine tenocytes were seeded on collagen scaffolds and cultured in static or dynamic conditions for 7 and 14 days. RESULTS The culture medium temperature did not exceed 37°C during prolonged culture experiments. The applied force oscillates between 1.5 and 4.5 N. The cyclic stimulation of the engineered constructs let both the cells and the scaffold fibers align along the strain direction in response to the mechanical stimulus. CONCLUSION We designed a pulsatile strain bioreactor for tendon tissue engineering. The in vitro characterization shows a preferential cell alignment at short time points. Prolonged culture time, however, seems to influence negatively on the survival of the cells indicating the need of further optimization concerning the culture conditions and the mechanical stimulation.
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Affiliation(s)
- Manuela Teresa Raimondi
- 1 Department of Chemistry, Materials and Chemical Engineering "Giulio Natta," Politecnico di Milano, Milan, Italy
| | - Matteo Laganà
- 1 Department of Chemistry, Materials and Chemical Engineering "Giulio Natta," Politecnico di Milano, Milan, Italy.,2 Gemma Prototipi, Longone al Segrino, Italy
| | - Claudio Conci
- 1 Department of Chemistry, Materials and Chemical Engineering "Giulio Natta," Politecnico di Milano, Milan, Italy
| | - Michele Crestani
- 1 Department of Chemistry, Materials and Chemical Engineering "Giulio Natta," Politecnico di Milano, Milan, Italy
| | - Alessia Di Giancamillo
- 3 Department of Health, Animal Science and Food Safety, Università degli Studi di Milano, Milan, Italy
| | - Francesca Gervaso
- 4 Department of Engineering for Innovation, University of Salento, Lecce, Italy
| | | | - Federica Boschetti
- 1 Department of Chemistry, Materials and Chemical Engineering "Giulio Natta," Politecnico di Milano, Milan, Italy
| | - Michele M Nava
- 1 Department of Chemistry, Materials and Chemical Engineering "Giulio Natta," Politecnico di Milano, Milan, Italy
| | | | - Cinzia Domeneghini
- 3 Department of Health, Animal Science and Food Safety, Università degli Studi di Milano, Milan, Italy
| | - Alessandro Sannino
- 4 Department of Engineering for Innovation, University of Salento, Lecce, Italy
| | - Giuseppe M Peretti
- 6 IRCCS Istituto Ortopedico Galeazzi, Milan, Italy.,7 Department of Biomedical Sciences for Health, University of Milan, Milan, Italy
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35
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Hayashi N, Sato T, Kokabu S, Usui M, Yumoto M, Ikami E, Sakamoto Y, Nifuji A, Hayata T, Noda M, Yoda T. Possible association of oestrogen and Cryba4 with masticatory muscle tendon-aponeurosis hyperplasia. Oral Dis 2018; 25:274-281. [PMID: 29683234 DOI: 10.1111/odi.12876] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Revised: 04/10/2018] [Accepted: 04/12/2018] [Indexed: 11/29/2022]
Abstract
OBJECTIVE Masticatory muscle tendon-aponeurosis hyperplasia, which is associated with limited mouth opening, progresses very slowly from adolescence. The prevalence rates of this disease are higher among women than among men, suggesting oestrogen involvement. As parafunctional habits are frequently observed, mechanical stress is likely involved in the pathogenesis and advancement of this disease. To elucidate the pathological condition, we examined the effect of oestrogen on tenocyte function and the relationship between mechanical stress and crystallin beta A4 (Cryba4), using murine TT-D6 tenocytes. MATERIALS AND METHODS Cell proliferation assays, RT-PCR, real-time RT-PCR, Western blot analysis and mechanical loading experiments were performed. RESULTS The physiological dose of oestrogen increased the levels of scleraxis and tenomodulin in TT-D6 tenocytes. In contrast, forced expression of Cryba4 inhibited scleraxis expression in these cells. Surprisingly, oestrogen significantly promoted cell differentiation in the Cryba4-overexpressing TT-D6 tenocytes. Moreover, tensile force induced Cryba4 expression in these tendon cells. CONCLUSION Oestrogen and Cryba4 may be associated with the progression of masticatory muscle tendon-aponeurosis hyperplasia.
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Affiliation(s)
- N Hayashi
- Department of Oral and Maxillofacial Surgery, Saitama Medical University, Saitama, Japan
| | - T Sato
- Department of Oral and Maxillofacial Surgery, Saitama Medical University, Saitama, Japan
| | - S Kokabu
- Department of Oral and Maxillofacial Surgery, Saitama Medical University, Saitama, Japan.,Division of Molecular Signaling and Biochemistry, Department of Health Promotion, Kyushu Dental University, Kitakyushu, Fukuoka, Japan
| | - M Usui
- Division of Periodontology, Department of Cardiology and Periodontology, Kyushu Dental University, Fukuoka, Japan
| | - M Yumoto
- Department of Oral and Maxillofacial Surgery, Saitama Medical University, Saitama, Japan
| | - E Ikami
- Department of Oral and Maxillofacial Surgery, Saitama Medical University, Saitama, Japan
| | - Y Sakamoto
- Division of Analytical Science, Department of Biomedical Research Center, Saitama Medical University, Saitama, Japan
| | - A Nifuji
- Department of Pharmacology, Tsurumi University School of Dental Medicine, Yokohama, Japan
| | - T Hayata
- Department of Molecular Pharmacology, Medical Research Institute, Tokyo Medical and Dental University, Tokyo, Japan
| | - M Noda
- Department of Molecular Pharmacology, Medical Research Institute, Tokyo Medical and Dental University, Tokyo, Japan
| | - T Yoda
- Department of Oral and Maxillofacial Surgery, Saitama Medical University, Saitama, Japan
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36
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Sugg KB, Markworth JF, Disser NP, Rizzi AM, Talarek JR, Sarver DC, Brooks SV, Mendias CL. Postnatal tendon growth and remodeling require platelet-derived growth factor receptor signaling. Am J Physiol Cell Physiol 2017; 314:C389-C403. [PMID: 29341790 DOI: 10.1152/ajpcell.00258.2017] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Platelet-derived growth factor receptor (PDGFR) signaling plays an important role in the fundamental biological activities of many cells that compose musculoskeletal tissues. However, little is known about the role of PDGFR signaling during tendon growth and remodeling in adult animals. Using the hindlimb synergist ablation model of tendon growth, our objectives were to determine the role of PDGFR signaling in the adaptation of tendons subjected to a mechanical growth stimulus, as well as to investigate the biological mechanisms behind this response. We demonstrate that both PDGFRs, PDGFRα and PDGFRβ, are expressed in tendon fibroblasts and that the inhibition of PDGFR signaling suppresses the normal growth of tendon tissue in response to mechanical growth cues due to defects in fibroblast proliferation and migration. We also identify membrane type-1 matrix metalloproteinase (MT1-MMP) as an essential proteinase for the migration of tendon fibroblasts through their extracellular matrix. Furthermore, we report that MT1-MMP translation is regulated by phosphoinositide 3-kinase/Akt signaling, while ERK1/2 controls posttranslational trafficking of MT1-MMP to the plasma membrane of tendon fibroblasts. Taken together, these findings demonstrate that PDGFR signaling is necessary for postnatal tendon growth and remodeling and that MT1-MMP is a critical mediator of tendon fibroblast migration and a potential target for the treatment of tendon injuries and diseases.
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Affiliation(s)
- Kristoffer B Sugg
- Department of Orthopaedic Surgery, University of Michigan Medical School , Ann Arbor, Michigan.,Department of Molecular and Integrative Physiology, University of Michigan Medical School , Ann Arbor, Michigan.,Department of Surgery, Section of Plastic and Reconstructive Surgery, University of Michigan Medical School, Ann Arbor, Michigan
| | - James F Markworth
- Department of Orthopaedic Surgery, University of Michigan Medical School , Ann Arbor, Michigan
| | - Nathaniel P Disser
- Department of Orthopaedic Surgery, University of Michigan Medical School , Ann Arbor, Michigan
| | - Andrew M Rizzi
- Department of Orthopaedic Surgery, University of Michigan Medical School , Ann Arbor, Michigan
| | - Jeffrey R Talarek
- Department of Orthopaedic Surgery, University of Michigan Medical School , Ann Arbor, Michigan.,Department of Molecular and Integrative Physiology, University of Michigan Medical School , Ann Arbor, Michigan
| | - Dylan C Sarver
- Department of Orthopaedic Surgery, University of Michigan Medical School , Ann Arbor, Michigan
| | - Susan V Brooks
- Department of Molecular and Integrative Physiology, University of Michigan Medical School , Ann Arbor, Michigan.,Department of Biomedical Engineering, University of Michigan Medical School , Ann Arbor, Michigan
| | - Christopher L Mendias
- Department of Orthopaedic Surgery, University of Michigan Medical School , Ann Arbor, Michigan.,Department of Molecular and Integrative Physiology, University of Michigan Medical School , Ann Arbor, Michigan.,Hospital for Special Surgery , New York, New York
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37
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Takahashi N, Tangkawattana P, Ootomo Y, Hirose T, Minaguchi J, Ueda H, Yamada M, Takehana K. Morphometric analysis of growing tenocytes in the superficial digital flexor tendon of piglets. J Vet Med Sci 2017; 79:1960-1967. [PMID: 29070765 PMCID: PMC5745172 DOI: 10.1292/jvms.17-0436] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
The fine structures of different tendons in various animals at different ages have been
studied extensively to reveal their arrangement and growth patterns. However, knowledge of
the microstructures of the growing tenocytes in the tendons of piglets is still lacking.
Thus, we performed the first morphometric analysis to describe the characteristics of
tenocytes in the metacarpal superficial digital flexor tendon of 0-, 10- and 20-day-old
piglets. In the present study, hydrochloric acid/collagenase digestion was applied to
remove the interstitial connective tissue to obtain clear visualization of intact
tenocytes and their cytoplasmic processes (Cp). Then, the morphometry of the tenocytes was
investigated by optical and electron microscopy. The mean ± SE values of the fascicle
area, number of tenocytes/fascicle, cell density, number of Cp/tenocyte, length of Cp, and
thickness of Cp were compared among the three age groups. Significant differences (judged
at P<0.05) were found in almost all morphometric aspects among the age
groups, except for the number of Cp/cell (P=0.545) and thickness of the
Cp (P=0.105). A decrease of cell density corresponded with an increase in
the length of the Cp, which were extended to connect either with the Cp of the other
tenocytes or the surrounding endotendineum. Moreover, an increase of the fascicle area
reflected the increase in tendon diameter. The revealed morphometric characteristics are
thus the outcome of tendon growth.
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Affiliation(s)
- Naoki Takahashi
- Laboratory of Microanatomy, School of Veterinary Medicine, Rakuno Gakuen University, Ebetsu, Hokkiado 069-8501, Japan
| | - Prasarn Tangkawattana
- Laboratory of Microanatomy, School of Veterinary Medicine, Rakuno Gakuen University, Ebetsu, Hokkiado 069-8501, Japan.,Department of Veterinary Anatomy, Faculty of Veterinary Medicine, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Yoshiki Ootomo
- Laboratory of Microanatomy, School of Veterinary Medicine, Rakuno Gakuen University, Ebetsu, Hokkiado 069-8501, Japan
| | - Takuya Hirose
- Laboratory of Microanatomy, School of Veterinary Medicine, Rakuno Gakuen University, Ebetsu, Hokkiado 069-8501, Japan
| | - Jun Minaguchi
- Laboratory of Microanatomy, School of Veterinary Medicine, Rakuno Gakuen University, Ebetsu, Hokkiado 069-8501, Japan
| | - Hiromi Ueda
- Laboratory of Microanatomy, School of Veterinary Medicine, Rakuno Gakuen University, Ebetsu, Hokkiado 069-8501, Japan
| | - Michi Yamada
- College of Agriculture, Department of Food and Environment Science, Rakuno Gakuen University, Ebetsu, Hokkaido 069-8501, Japan
| | - Kazushige Takehana
- Laboratory of Microanatomy, School of Veterinary Medicine, Rakuno Gakuen University, Ebetsu, Hokkiado 069-8501, Japan
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Dale TP, Mazher S, Webb WR, Zhou J, Maffulli N, Chen GQ, El Haj AJ, Forsyth NR. Tenogenic Differentiation of Human Embryonic Stem Cells. Tissue Eng Part A 2017; 24:361-368. [PMID: 28548630 DOI: 10.1089/ten.tea.2017.0017] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Tendon healing is complex to manage because of the limited regeneration capacity of tendon tissue; stem cell-based tissue engineering approaches may provide alternative healing strategies. We sought to determine whether human embryonic stem cells (hESC) could be induced to differentiate into tendon-like cells by the addition of exogenous bone morphogenetic protein (BMP)12 (growth differentiation factor[GDF]7) and BMP13 (GDF6). hESC (SHEF-1) were maintained with or without BMP12/13 supplementation, or supplemented with BMP12/13 and the Smad signaling cascade blocking agent, dorsomorphin. Primary rat tenocytes were included as a positive control in immunocytochemistry analysis. A tenocyte-like elongated morphology was observed in hESC after 40-days continuous supplementation with BMP12/13 and ascorbic acid (AA). These cells displayed a tenomodulin expression pattern and morphology consistent with that of the primary tenocyte control. Analysis of tendon-linked gene transcription in BMP12/13 supplemented hESC demonstrated consistent expression of COL1A2, COL3A1, DCN, TNC, THBS4, and TNMD levels. Conversely, when hESCs were cultured in the presence of BMP12/13 and dorsomorphin COL3A1, DCN, and TNC gene expression and tendon matrix formation were inhibited. Taken together, we have demonstrated that hESCs are responsive to tenogenic induction via BMP12/13 in the presence of AA. The directed in vitro generation of tenocytes from pluripotent stem cells may facilitate the development of novel repair approaches for this difficult to heal tissue.
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Affiliation(s)
- Tina P Dale
- 1 Guy Hilton Research Centre, Institute for Science and Technology in Medicine, Faculty of Medicine and Health Sciences, Keele University , Thornburrow Drive, Stoke-on-Trent, Staffordshire, United Kingdom
| | - Shazia Mazher
- 1 Guy Hilton Research Centre, Institute for Science and Technology in Medicine, Faculty of Medicine and Health Sciences, Keele University , Thornburrow Drive, Stoke-on-Trent, Staffordshire, United Kingdom
| | - William R Webb
- 1 Guy Hilton Research Centre, Institute for Science and Technology in Medicine, Faculty of Medicine and Health Sciences, Keele University , Thornburrow Drive, Stoke-on-Trent, Staffordshire, United Kingdom
| | - Jing Zhou
- 2 School of Life Science, Tsinghua University , Beijing, China
| | - Nicola Maffulli
- 3 Centre for Sport and Exercise Medicine, Queen Mary University of London , United Kingdom
| | - Guo-Qiang Chen
- 2 School of Life Science, Tsinghua University , Beijing, China
| | - Alicia J El Haj
- 1 Guy Hilton Research Centre, Institute for Science and Technology in Medicine, Faculty of Medicine and Health Sciences, Keele University , Thornburrow Drive, Stoke-on-Trent, Staffordshire, United Kingdom
| | - Nicholas R Forsyth
- 1 Guy Hilton Research Centre, Institute for Science and Technology in Medicine, Faculty of Medicine and Health Sciences, Keele University , Thornburrow Drive, Stoke-on-Trent, Staffordshire, United Kingdom
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39
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Jo CH, Lee SY, Yoon KS, Shin S. Effects of Platelet-Rich Plasma With Concomitant Use of a Corticosteroid on Tenocytes From Degenerative Rotator Cuff Tears in Interleukin 1β-Induced Tendinopathic Conditions. Am J Sports Med 2017; 45:1141-1150. [PMID: 28061032 DOI: 10.1177/0363546516681294] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
BACKGROUND A corticosteroid injection is commonly used to treat tendinopathy, but it has been associated with negative effects on tendon homeostasis. Platelet-rich plasma (PRP) is known to have proliferative and anabolic effects as well as cytoprotective effects against corticosteroids on tenocytes. However, the combined effects of a corticosteroid and PRP on the anti-inflammatory, matrix synthesis, and cytoprotective potential of tenocytes in conditions simulating tendinopathy have not been investigated. PURPOSE To assess the effects of PRP on tenocytes from degenerative rotator cuff tears with the concomitant use of a corticosteroid in interleukin 1β (IL-1β)-induced tendinopathic conditions. STUDY DESIGN Controlled laboratory study. METHODS Tenocytes were enzymatically isolated and cultured from patients with degenerative rotator cuff tears. PRP was prepared using a plateletpheresis system, and growth factor concentrations were measured. To evaluate the gene expression of proinflammatory and anti-inflammatory cytokines, enzymes and their inhibitors, and matrix molecules, cells were cultured with 1 ng/mL IL-1β, 1 μM dexamethasone, and 10% (vol/vol) platelet-poor plasma (PPP) and PRP of 200, 1000, and 4000 × 103/μL; quantitative real-time reverse transcriptase polymerase chain reaction was also performed. Western blotting was performed to investigate the protein synthesis of degradative enzymes and their inhibitors. Cell viability, apoptosis, and senescence assays were also conducted. RESULTS PRP did not interfere with the anti-inflammatory effects of dexamethasone on tenocytes pretreated with IL-1β, but it increased the synthesis of tissue inhibitor of metalloproteinase (TIMP)-1 and -3. Meanwhile, PRP did not induce anti-inflammatory cytokines that had been suppressed with a corticosteroid. It did increase the type I/III collagen ratio mainly through the suppression of type III collagen expression. PRP reversed the decreased viability, increased apoptosis, and induced senescence with IL-1β and a corticosteroid. CONCLUSION This study shows that the addition of PRP does not interfere with the anti-inflammatory effects of a corticosteroid on IL-1β-treated tenocytes from degenerative rotator cuff tears but that it does avoid the deleterious side effects of a corticosteroid. CLINICAL RELEVANCE PRP can be clinically useful with a corticosteroid as a treatment for tendinopathy.
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Affiliation(s)
- Chris Hyunchul Jo
- Department of Orthopedic Surgery, Seoul Metropolitan Government-Seoul National University Boramae Medical Center, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Seung Yeon Lee
- Department of Orthopedic Surgery, Seoul Metropolitan Government-Seoul National University Boramae Medical Center, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Kang Sup Yoon
- Department of Orthopedic Surgery, Seoul Metropolitan Government-Seoul National University Boramae Medical Center, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Sue Shin
- Department of Laboratory Medicine, Seoul Metropolitan Government-Seoul National University Boramae Medical Center, Seoul National University College of Medicine, Seoul, Republic of Korea
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40
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Uemura K, Hayashi M, Itsubo T, Oishi A, Iwakawa H, Komatsu M, Uchiyama S, Kato H. Myostatin promotes tenogenic differentiation of C2C12 myoblast cells through Smad3. FEBS Open Bio 2017; 7:522-532. [PMID: 28396837 PMCID: PMC5377394 DOI: 10.1002/2211-5463.12200] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2016] [Revised: 12/31/2016] [Accepted: 01/23/2017] [Indexed: 12/22/2022] Open
Abstract
Myostatin, a member of the transforming growth factor-β (TGF-β) superfamily, is expressed in developing and adult skeletal muscle and negatively regulates skeletal muscle growth. Recently, myostatin has been found to be expressed in tendons and increases tendon fibroblast proliferation and the expression of tenocyte markers. C2C12 is a mouse myoblast cell line, which has the ability to transdifferentiate into osteoblast and adipocyte lineages. We hypothesized that myostatin is capable of inducing tenogenic differentiation of C2C12 cells. We found that the expression of scleraxis, a tendon progenitor cell marker, is much higher in C2C12 than in the multipotent mouse mesenchymal fibroblast cell line C3H10T1/2. In comparison with other growth factors, myostatin significantly up-regulated the expression of the tenogenic marker in C2C12 cells under serum-free culture conditions. Immunohistochemistry showed that myostatin inhibited myotube formation and promoted the formation of spindle-shaped cells expressing tenomodulin. We examined signaling pathways essential for tenogenic differentiation to clarify the mechanism of myostatin-induced differentiation of C2C12 into tenocytes. The expression of tenomodulin was significantly suppressed by treatment with the ALK inhibitor SB341542, in contrast to p38MAPK (SB203580) and MEK1 (PD98059) inhibitors. RNAi silencing of Smad3 significantly suppressed myostatin-induced tenomodulin expression. These results indicate that myostatin has a potential role in the induction of tenogenic differentiation of C2C12 cells, which have tendon progenitor cell characteristics, through activation of Smad3-mediated signaling.
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Affiliation(s)
- Kazutaka Uemura
- Department of Orthopaedic Surgery Shinshu University School of Medicine Matsumoto Japan
| | - Masanori Hayashi
- Department of Orthopaedic Surgery Shinshu University School of Medicine Matsumoto Japan
| | | | - Ayumu Oishi
- Department of Orthopaedic Surgery Shinshu University School of Medicine Matsumoto Japan
| | - Hiroko Iwakawa
- Department of Orthopaedic Surgery Shinshu University School of Medicine Matsumoto Japan
| | - Masatoshi Komatsu
- Department of Orthopaedic Surgery Shinshu University School of Medicine Matsumoto Japan
| | - Shigeharu Uchiyama
- Department of Orthopaedic Surgery Shinshu University School of Medicine Matsumoto Japan
| | - Hiroyuki Kato
- Department of Orthopaedic Surgery Shinshu University School of Medicine Matsumoto Japan
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41
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Patel D, Sharma S, Bryant SJ, Screen HRC. Recapitulating the Micromechanical Behavior of Tension and Shear in a Biomimetic Hydrogel for Controlling Tenocyte Response. Adv Healthc Mater 2017; 6. [PMID: 28026126 PMCID: PMC5469035 DOI: 10.1002/adhm.201601095] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2016] [Revised: 11/21/2016] [Indexed: 12/11/2022]
Abstract
A fiber composite system is presented which recapitulates the fiber-composite-like nature of tissues and generates similar modes of shear and tension. The shear/tension ratio can be customized during composite manufacture and incorporates viable cells. The system is a valuable tool for mechanotransduction research, providing a platform with physiologically relevant conditions for investigating cell behavior in different tissue types.
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Affiliation(s)
- Dharmesh Patel
- School of Engineering and Materials Science; Queen Mary University of London; Mile End Road London E1 4NS UK
| | - Sadhana Sharma
- Department of Chemical and Biological Engineering; University of Colorado Boulder; Boulder CO 80303 USA
| | - Stephanie J. Bryant
- Department of Chemical and Biological Engineering; Material Science and Engineering Program; BioFrontiers Institute; University of Colorado; Boulder CO 80303 USA
| | - Hazel R. C. Screen
- School of Engineering and Materials Science; Queen Mary University of London; Mile End Road London E1 4NS UK
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42
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Nuelle CW, Cook CR, Stoker AM, Cook JL, Sherman SL. In vitro toxicity of local anaesthetics and corticosteroids on supraspinatus tenocyte viability and metabolism. J Orthop Translat 2016; 8:20-24. [PMID: 30035090 PMCID: PMC5987053 DOI: 10.1016/j.jot.2016.08.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/12/2016] [Revised: 07/12/2016] [Accepted: 08/15/2016] [Indexed: 02/07/2023] Open
Abstract
Background/Objective The purpose of this study was to evaluate supraspinatus tenocyte viability and metabolism in explants exposed to various local anaesthetics and corticosteroids. Our hypothesis was that the tendons exposed to these common injectates would have significantly decreased cell viability and metabolism compared with controls. Methods Supraspinatus tendon explants were obtained from dogs, placed in a culture media, and randomly assigned to one of the following groups: culture media only (control), 1% lidocaine, 0.5% lidocaine, 0.25% bupivacaine, 0.125% bupivacaine, 0.0625% bupivacaine, betamethasone acetate (5 mg), methylprednisolone acetate (40 mg), or triamcinolone acetonide (40 mg). Cell viability was determined on Days 1 and 7 after culture treatment using calcein AM (live cell) and Sytox Blue (dead cell) stains. Tissue metabolism was assessed on Days 1 and 7 using the resazurin blue metabolic assay. Significant differences were evaluated using a one-way analysis of variance with Tukey post hoc analysis. Results Compared with the controls, there were significant decreases in cell viability noted at Days 1 and 7 in tenocytes exposed to 1% lidocaine, betamethasone, and methylprednisolone. Significant decreases in cell metabolism were also noted at Days 1 and 7 in those groups. Treatment with 0.125% bupivacaine, 0.0625% bupivacaine, and triamcinolone demonstrated no decrease in cell viability or metabolism when compared with controls at any time point. Conclusion This data confirms that peritendinous injection of commonly used local anaesthetics and corticosteroids results in significant supraspinatus tenotoxicity in vitro. Further in vivo studies are required before making definitive clinical recommendations.
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Affiliation(s)
- Clayton W Nuelle
- Department of Orthopaedic Surgery, University of Missouri, 1100 Virginia Avenue, DC953.00, Columbia, MO, USA
| | - Cristi R Cook
- Thompson Laboratory for Regenerative Orthopaedics, Department of Orthopaedic Surgery, University of Missouri, 1100 Virginia Avenue, DC953.00, Columbia, MO, USA
| | - Aaron M Stoker
- Thompson Laboratory for Regenerative Orthopaedics, Department of Orthopaedic Surgery, University of Missouri, 1100 Virginia Avenue, DC953.00, Columbia, MO, USA
| | - James L Cook
- Department of Orthopaedic Surgery, University of Missouri, 1100 Virginia Avenue, DC953.00, Columbia, MO, USA.,Thompson Laboratory for Regenerative Orthopaedics, Department of Orthopaedic Surgery, University of Missouri, 1100 Virginia Avenue, DC953.00, Columbia, MO, USA
| | - Seth L Sherman
- Department of Orthopaedic Surgery, University of Missouri, 1100 Virginia Avenue, DC953.00, Columbia, MO, USA
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Thorpe CT, McDermott BT, Goodship AE, Clegg PD, Birch HL. Ageing does not result in a decline in cell synthetic activity in an injury prone tendon. Scand J Med Sci Sports 2016; 26:684-93. [PMID: 26058332 DOI: 10.1111/sms.12500] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/05/2015] [Indexed: 12/16/2023]
Abstract
Advancing age is a well-known risk factor for tendon disease. Energy-storing tendons [e.g., human Achilles, equine superficial digital flexor tendon (SDFT)] are particularly vulnerable and it is thought that injury occurs following an accumulation of micro-damage in the extracellular matrix (ECM). Several authors suggest that age-related micro-damage accumulates due to a failure of the aging cell population to maintain the ECM or an imbalance between anabolic and catabolic pathways. We hypothesized that ageing results in a decreased ability of tendon cells to synthesize matrix components and matrix-degrading enzymes, resulting in a reduced turnover of the ECM and a decreased ability to repair micro-damage. The SDFT was collected from horses aged 3-30 years with no signs of tendon injury. Cell synthetic and degradative ability was assessed at the mRNA and protein levels. Telomere length was measured as an additional marker of cell ageing. There was no decrease in cellularity or relative telomere length with increasing age, and no decline in mRNA or protein levels for matrix proteins or degradative enzymes. The results suggest that the mechanism for age-related tendon deterioration is not due to reduced cellularity or a loss of synthetic functionality and that alternative mechanisms should be considered.
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Affiliation(s)
- C T Thorpe
- Institute of Orthopaedics and Musculoskeletal Science, Royal National Orthopaedic Hospital, University College London, Stanmore, UK
| | - B T McDermott
- Department of Musculoskeletal Biology, University of Liverpool, Cheshire, UK
| | - A E Goodship
- Institute of Orthopaedics and Musculoskeletal Science, Royal National Orthopaedic Hospital, University College London, Stanmore, UK
| | - P D Clegg
- Department of Musculoskeletal Biology, University of Liverpool, Cheshire, UK
| | - H L Birch
- Institute of Orthopaedics and Musculoskeletal Science, Royal National Orthopaedic Hospital, University College London, Stanmore, UK
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Frizziero A, Salamanna F, Della Bella E, Vittadini F, Gasparre G, Nicoli Aldini N, Masiero S, Fini M. The Role of Detraining in Tendon Mechanobiology. Front Aging Neurosci 2016; 8:43. [PMID: 26973517 PMCID: PMC4770795 DOI: 10.3389/fnagi.2016.00043] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2015] [Accepted: 02/15/2016] [Indexed: 12/18/2022] Open
Abstract
Introduction: Several conditions such as training, aging, estrogen deficiency and drugs could affect the biological and anatomo-physiological characteristics of the tendon. Additionally, recent preclinical and clinical studies examined the effect of detraining on tendon, showing alterations in its structure and morphology and in tenocyte mechanobiology. However, few data evaluated the importance that cessation of training might have on tendon. Basically, we do not fully understand how tendons react to a phase of training followed by sudden detraining. Therefore, within this review, we summarize the studies where tendon detraining was examined. Materials and Methods: A descriptive systematic literature review was carried out by searching three databases (PubMed, Scopus and Web of Knowledge) on tendon detraining. Original articles in English from 2000 to 2015 were included. In addition, the search was extended to the reference lists of the selected articles. A public reference manager (www.mendeley.com) was adopted to remove duplicate articles. Results: An initial literature search yielded 134 references (www.pubmed.org: 53; www.scopus.com: 11; www.webofknowledge.com: 70). Fifteen publications were extracted based on the title for further analysis by two independent reviewers. Abstracts and complete articles were after that reviewed to evaluate if they met inclusion criteria. Conclusions: The revised literature comprised four clinical studies and an in vitro and three in vivo reports. Overall, the results showed that tendon structure and properties after detraining are compromised, with an alteration in the tissue structural organization and mechanical properties. Clinical studies usually showed a lesser extent of tendon alterations, probably because preclinical studies permit an in-depth evaluation of tendon modifications, which is hard to perform in human subjects. In conclusion, after a period of sudden detraining (e.g., after an injury), physical activity should be taken with caution, following a targeted rehabilitation program. However, further research should be performed to fully understand the effect of sudden detraining on tendons.
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Affiliation(s)
- Antonio Frizziero
- Department of Physical and Rehabilitation Medicine, University of Padua Padua, Italy
| | - Francesca Salamanna
- Laboratory of Biocompatibility, Technological Innovations and Advanced Therapies, RIT Department, Rizzoli Orthopedic Institute Bologna, Italy
| | - Elena Della Bella
- Laboratory of Preclinical and Surgical Studies, Rizzoli Orthopedic InstituteBologna, Italy; Department of Experimental, Diagnostic and Specialty Medicine, University of BolognaBologna, Italy
| | - Filippo Vittadini
- Department of Physical and Rehabilitation Medicine, University of Padua Padua, Italy
| | - Giuseppe Gasparre
- Department of Physical and Rehabilitation Medicine, University of Padua Padua, Italy
| | - Nicolò Nicoli Aldini
- Laboratory of Biocompatibility, Technological Innovations and Advanced Therapies, RIT Department, Rizzoli Orthopedic InstituteBologna, Italy; Laboratory of Preclinical and Surgical Studies, Rizzoli Orthopedic InstituteBologna, Italy
| | - Stefano Masiero
- Department of Physical and Rehabilitation Medicine, University of Padua Padua, Italy
| | - Milena Fini
- Laboratory of Biocompatibility, Technological Innovations and Advanced Therapies, RIT Department, Rizzoli Orthopedic InstituteBologna, Italy; Laboratory of Preclinical and Surgical Studies, Rizzoli Orthopedic InstituteBologna, Italy
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Abstract
This article is one of a series, summarizing views expressed at the Orthopaedic Research Society New Frontiers in Tendon Research Conference. This particular article reviews the three workshops held under the "Functional Extracellular Matrix" stream. The workshops focused on the roles of the tendon extracellular matrix, such as performing the mechanical functions of tendon, creating the local cell environment, and providing cellular cues. Tendon is a complex network of matrix and cells, and its biological functions are influenced by widely varying extrinsic and intrinsic factors such as age, nutrition, exercise levels, and biomechanics. Consequently, tendon adapts dynamically during development, aging, and injury. The workshop discussions identified research directions associated with understanding cell-matrix interactions to be of prime importance for developing novel strategies to target tendon healing or repair.
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Affiliation(s)
- H.R.C. Screen
- Institute of Bioengineering, School of Engineering and Materials Science, Queen Mary University of London, Mile End Road, London, E1 4NS, UK
| | - D.E. Birk
- University of South Florida, Morsani College of Medicine, Department of Molecular Pharmacology & Physiology, 12901 Bruce B. Downs Blvd., Tampa, FL. USA
| | - K.E. Kadler
- Wellcome Trust Centre for Cell-Matrix Research, Faculty of Life Sciences, University of Manchester, Oxford Road, Manchester M13 9PT, UK
| | - F Ramirez
- Department of Pharmacology and Systems Therapeutics, Icahn School of Medicine at Mount Sinai, New York, NY 10021 USA
| | - M.F. Young
- Craniofacial and Skeletal Diseases Branch, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD 20892, USA
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Lavagnino M, Wall ME, Little D, Banes AJ, Guilak F, Arnoczky SP. Tendon mechanobiology: Current knowledge and future research opportunities. J Orthop Res 2015; 33:813-22. [PMID: 25763779 PMCID: PMC4524513 DOI: 10.1002/jor.22871] [Citation(s) in RCA: 96] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/08/2015] [Accepted: 02/13/2015] [Indexed: 02/04/2023]
Abstract
Tendons mainly function as load-bearing tissues in the muscloskeletal system; transmitting loads from muscle to bone. Tendons are dynamic structures that respond to the magnitude, direction, frequency, and duration of physiologic as well as pathologic mechanical loads via complex interactions between cellular pathways and the highly specialized extracellular matrix. This paper reviews the evolution and current knowledge of mechanobiology in tendon development, homeostasis, disease, and repair. In addition, we review several novel mechanotransduction pathways that have been identified recently in other tissues and cell types, providing potential research opportunities in the field of tendon mechanobiology. We also highlight current methods, models, and technologies being used in a wide variety of mechanobiology research that could be investigated in the context of their potential applicability for answering some of the fundamental unanswered questions in this field. The article concludes with a review of the major questions and future goals discussed during the recent ORS/ISMMS New Frontiers in Tendon Research Conference held on September 10 and 11, 2014 in New York City.
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Affiliation(s)
- Michael Lavagnino
- Laboratory for Comparative Orthopaedic Research, College of Veterinary Medicine Michigan State University, East Lansing, Michigan
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Abstract
Superficial digital flexor tendon (SDFT) injury in equine athletes is one of the most well-accepted, scientifically supported companion animal models of human disease (i.e., exercise-induced Achilles tendon [AT] injury). The SDFT and AT are functionally and clinically equivalent (and important) energy-storing structures for which no equally appropriate rodent, rabbit, or other analogues exist. Access to equine tissues has facilitated significant advances in knowledge of tendon maturation and aging, determination of specific exercise effects (including early life), and definition of some of the earliest stages of subclinical pathology. Access to human surgical biopsies has provided complementary information on more advanced phases of disease. Importantly, equine SDFT injuries are only a model for acute ruptures in athletes, not the entire spectrum of human tendonopathy (including chronic tendon pain). In both, pathology begins with a potentially prolonged phase of accumulation of (subclinical) microdamage. Recent work has revealed remarkably similar genetic risk factors, including further evidence that tenocyte dysfunction plays an active role. Mice are convenient but not necessarily accurate models for multiple diseases, particularly at the cellular level. Mechanistic studies, including tendon cell responses to combinations of exercise-associated stresses, require a more thorough investigation of cross-species conservation of key stress pathway auditors. Molecular evidence has provided some context for the poor performance of mouse models; equines may provide better systems at this level. The use of horses may be additionally justifiable based on comparable species longevity, lifestyle factors, and selection pressure by similar infectious agents (e.g., herpesviruses) on general cell stress pathway evolution.
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Andia I, Rubio-Azpeitia E. Angiogenic and innate immune responses triggered by PRP in tendon cells are not modified by hyperuricemia. Muscles Ligaments Tendons J 2014; 4:292-297. [PMID: 25489545 PMCID: PMC4241418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
BACKGROUND hyperuricemia is becoming a critical medical problem, and a current focus of research. Uric acid is also a death cell associated stressor that may trigger innate immune responses via the synthesis of inflammatory and angiogenic proteins. PURPOSE to investigate the angiogenic/inflammatory protein profile of tendon cells treated with Platelet Rich Plasma (PRP), and to assess if there are any differences in synthesis of angiogenic/inflammatory cytokines between PRP-treated or hyperuricemic PRP-treated cells. METHODS tendon cells were treated with PRP or hyperuricemic PRP and cell culture supernatants examined using glass based protein arrays for inflammation and angiogenesis. Relevant proteins were subsequently quantified by ELISA or EASIA methods. RESULTS the impact of PRP on angiogenesis and inflammation is evidenced by relevant cytokine synthesis including: Monocyte Chemoattractant Protein (MCP-1/CCL2), Regulated upon Activation Normally T cells Expressed and Secreted (RANTES/CCL5), IL-6/CXCL6, IL-8/CXCL8, Vascular Endothelial Growth Factor (VEGF), Growth Regulated Protein (GRO-a/CXCL1) and Hepatocyte Growth Factor (HGF). IL-1beta was not detected in these conditions. Taken together these data suggest an initial angiogenetic and innate immune responses driven by chemokines that is not altered by the presence of hyperuricemia, at this point, except for IL-8 secretion, p= 0.042.
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Affiliation(s)
- Isabel Andia
- Corresponding author: Isabel Andia, Regenerative Medicine Laboratory BioCruces, Health Research Institute Cruces University Hospital, P.za Cruces S/N, 48903 Barakaldo, Spain, E-mail:
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Poulsen RC, Knowles HJ, Carr AJ, Hulley PA. Cell differentiation versus cell death: extracellular glucose is a key determinant of cell fate following oxidative stress exposure. Cell Death Dis 2014; 5:e1074. [PMID: 24556689 DOI: 10.1038/cddis.2014.52] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2013] [Revised: 12/01/2013] [Accepted: 12/02/2013] [Indexed: 02/07/2023]
Abstract
Cells, particularly mechano-sensitive musculoskeletal cells such as tenocytes, routinely encounter oxidative stress. Oxidative stress can not only stimulate tissue repair, but also cause damage leading to tissue degeneration. As diabetes is associated with increased oxidative damage as well as increased risk of tendon degeneration, the aim of this study was to determine if extracellular glucose levels alter the response of tendon cells to oxidative stress. Primary human tenocytes were cultured in either high (17.5 mM) or low (5 mM) glucose and treated with 100 μM hydrogen peroxide. In low glucose, peroxide-treated cells remained fully viable and collagen synthesis was increased, suggesting an anabolic response. In high glucose, however, peroxide treatment led to increased bim-mediated apoptosis. The activities of both forkhead box O (FOXO1) and p53 were required for upregulation of bim RNA expression in high glucose. We found that both p53-mediated inhibition of the bim repressor micro RNA (miR17-92) and FOXO1-mediated upregulation of bim transcription were required to permit accumulation of bim RNA. High glucose coupled with oxidative stress resulted in upregulation of miR28-5p, which directly inhibited expression of the p53 deacetylase sirtuin 3, resulting in increased levels of acetylated p53. In peroxide-treated cells in both high and low glucose, protein levels of acetylated FOXO1 as well as HIF1α (hypoxia-inducible factor 1α) were increased. However, under low-glucose conditions, peroxide treatment resulted in activation of p38, which inhibited FOXO1-mediated but promoted HIF1α-mediated transcriptional activity. In low glucose, HIF1α upregulated expression of sox9 and scleraxis, two critical transcription factors involved in establishing the tenocyte phenotype, and increased collagen synthesis. The switch from FOXO1-mediated (proapoptosis) to HIF1α-mediated (prodifferentiation) transcription occurred at an extracellular glucose concentration of 7 mM, a concentration equivalent to the maximum normal blood glucose concentration. Extracellular glucose has a profound effect on the cellular response to oxidative stress. A level of oxidative stress normally anabolic may be pathological in high glucose.
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Qiu Y, Wang X, Zhang Y, Carr AJ, Zhu L, Xia Z, Sabokbar A. In vitro two-dimensional and three-dimensional tenocyte culture for tendon tissue engineering. J Tissue Eng Regen Med 2013; 10:E216-26. [PMID: 24039070 DOI: 10.1002/term.1791] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2012] [Revised: 04/19/2013] [Accepted: 05/27/2013] [Indexed: 01/26/2023]
Abstract
In order to examine the differentiation potential of the tenocytes expanded in our defined culture medium (reported previously) and the effect of sequential combination of the two culture conditions on human tenocytes, a two-dimensional and three-dimensional experimental approach was used. Human tenocytes were sequentially exposed to 1% fetal bovine serum (FBS) + 50 ng/ml platelet-derived growth factor-BB (PDGFBB ) + 50 ng/ml basic fibroblast growth factor (bFGF) for the first 14 days (expansion phase) followed by a further 14-day culture in the presence of 10 ng/ml transforming growth factor β-3 plus 50 ng/ml insulin-like growth factor 1, but in the absence of serum (differentiation phase). The results showed that by sequential treatment of human tenocytes maintaining a long-term two-dimensional tenocyte culture in vitro for up to 28 days was possible. These findings were further verified using a three-dimensional scaffold (Bombyx silk) whereby the tendon-like constructs formed resembled macroscopically and microscopically the constructs formed in 10% FBS supplemented culture media and the human hamstring tendon. These findings were further substantiated using haematoxylin and eosin staining, scanning electron microscopy and by immunohistochemical detection of type I collagen. In addition, the mechanical properties of the three-dimensional constructs were determined to be significantly superior to that of the natural human hamstring tendon. This is the first report to demonstrate a possible approach in expanding and differentiating human tenocytes for tendon tissue engineering.
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Affiliation(s)
- Yiwei Qiu
- General Surgery Department, Tianjin Medical University General Hospital, Tianjin Medical University, Tianjin, China.,Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK
| | - Xiao Wang
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK
| | - Yaonan Zhang
- Department of Orthopaedics, Beijing Hospital of Ministry of Public Health, Beijing, China
| | - Andrew J Carr
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK
| | - Liwei Zhu
- General Surgery Department, Tianjin Medical University General Hospital, Tianjin Medical University, Tianjin, China
| | - Zhidao Xia
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK.,Institute of Life Science, Swansea University, Singleton Park, Swansea, UK
| | - Afsie Sabokbar
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK
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