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Álvarez-Herms J. Summatory Effects of Anaerobic Exercise and a 'Westernized Athletic Diet' on Gut Dysbiosis and Chronic Low-Grade Metabolic Acidosis. Microorganisms 2024; 12:1138. [PMID: 38930520 PMCID: PMC11205432 DOI: 10.3390/microorganisms12061138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2024] [Revised: 05/27/2024] [Accepted: 05/28/2024] [Indexed: 06/28/2024] Open
Abstract
Anaerobic exercise decreases systemic pH and increases metabolic acidosis in athletes, altering the acid-base homeostasis. In addition, nutritional recommendations advising athletes to intake higher amounts of proteins and simple carbohydrates (including from sport functional supplements) could be detrimental to restoring acid-base balance. Here, this specific nutrition could be classified as an acidic diet and defined as 'Westernized athletic nutrition'. The maintenance of a chronic physiological state of low-grade metabolic acidosis produces detrimental effects on systemic health, physical performance, and inflammation. Therefore, nutrition must be capable of compensating for systemic acidosis from anaerobic exercise. The healthy gut microbiota can contribute to improving health and physical performance in athletes and, specifically, decrease the systemic acidic load through the conversion of lactate from systemic circulation to short-chain fatty acids in the proximal colon. On the contrary, microbial dysbiosis results in negative consequences for host health and physical performance because it results in a greater accumulation of systemic lactate, hydrogen ions, carbon dioxide, bacterial endotoxins, bioamines, and immunogenic compounds that are transported through the epithelia into the blood circulation. In conclusion, the systemic metabolic acidosis resulting from anaerobic exercise can be aggravated through an acidic diet, promoting chronic, low-grade metabolic acidosis in athletes. The individuality of athletic training and nutrition must take into consideration the acid-base homeostasis to modulate microbiota and adaptive physiological responses.
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Affiliation(s)
- Jesús Álvarez-Herms
- Phymolab, Physiology and Molecular Laboratory, 40170 Collado Hermoso, Segovia, Spain
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2
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Zhang H, Xu M, Zhao Y, Li Z, Han B, Wang S, Zhang J, Zhang J, Hu Y. Can the Sterilization Protocol Be Improved to Enhance the Healing of Allograft Tendons? An In Vivo Study in Rabbit Tendons. Clin Orthop Relat Res 2024; 482:1074-1086. [PMID: 38427791 PMCID: PMC11124595 DOI: 10.1097/corr.0000000000003017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Accepted: 01/31/2024] [Indexed: 03/03/2024]
Abstract
BACKGROUND Peracetic acid and irradiation are common sterilization methods for allograft tendons; however, under some conditions, both methods adversely affect the fiber arrangement and ultimate load of the tendon. An in vitro study showed that low-dose peracetic acid combined with irradiation may be less detrimental to allograft tendon structure and properties, possibly because the breakdown of peracetic acid can lead to an enlargement of the interstitial spaces and an increase in porosity. QUESTIONS/PURPOSES Using a rabbit Achilles tendon model, we asked: What is the effect of peracetic acid-ethanol combined irradiation on (1) the histopathology and fiber diameter of the allograft tendon, (2) tensile creep and load-to-failure biomechanical properties of allograft tendons, and (3) healing of the treated tendon in vivo compared with fresh-frozen allograft and peracetic acid-ethanol sterilization at 4 and 8 weeks? METHODS The Achilles tendons used in this study were sourced from euthanized 10-week-old male New Zealand White rabbits previously used for ophthalmic experiments. All allografts were divided into three groups: fresh-frozen group (control group, n = 20), peracetic acid-ethanol sterilization group (n =20), and peracetic acid-ethanol combined irradiation group (n = 20). The sterilization protocols were performed per a predetermined plan. In the peracetic acid-ethanol sterilization group, the tendon tissues were covered with the peracetic acid-ethanol sterilization solution (1% peracetic acid for 30 minutes). In the peracetic acid-ethanol combined irradiation group, the tendon tissues were covered with the peracetic acid-ethanol sterilization solution (0.2% peracetic acid for 30 minutes) and were subjected to 15 kGy gamma irradiation. Thirty 10-week-old male New Zealand White rabbits received bilateral Achilles tendon allografts surgically. Tendon samples from each group were harvested at 4 weeks (n = 30) and 8 weeks (n = 30) postoperatively. For each timepoint, eight tissues were used for histologic staining and electron microscopy, 15 tissues were used for biomechanical testing, and seven tissues were used for hydroxyproline assay and quantitative polymerase chain reaction. Histopathology was determined qualitatively by hematoxylin and eosin and Masson staining, while fiber diameter was measured quantitatively by transmission electron microscopy. Biomechanical properties were measured using cyclic loading tests and load-to-failure tests. The healing outcome was quantitatively judged through healing-related genes and proteins. RESULTS At 4 weeks and 8 weeks postoperatively, the peracetic acid-ethanol combined irradiation group visually demonstrated the best continuity and minimal peripheral adhesions. Histologic staining showed that tendon fibers in the peracetic acid-ethanol combined irradiation group maintained consistent alignment without notable disruptions or discontinuities, and there was a qualitatively observed increase in the number of infiltrating cells compared with the control group at the 4-week timepoint (444 ± 49 /mm 2 versus 256 ± 43 /mm 2 , mean difference 188 /mm 2 [95% confidence interval 96 to 281]; p < 0.001). At 8 weeks postoperatively, the tendon fiber diameter in the peracetic acid-ethanol combined irradiation groups was similar to that of the control group (0.23 ± 0.04 µm versus 0.21 ± 0.03 µm, mean difference 0.02 µm [95% CI -0.04 to 0.08]; p = 0.56). At 8 weeks postoperatively, the peracetic acid-ethanol combined irradiation group exhibited better properties in terms of both ultimate load (129 ± 15 N versus 89 ± 20 N, mean difference 40 N [95% CI 7 to 73]; p = 0.02) and energy absorption density (17 ± 6 kJ/m 2 versus 8 ± 4 kJ/m 2 , mean difference 8 kJ/m 2 [95% CI 0.7 to 16]; p = 0.004) compared with the control group. Gene expression analysis revealed higher expression levels of COL1A1 (2.1 ± 0.8 versus 1.0 ± 0, mean difference 1.1 [95% CI 0.1 to 2.1]; p = 0.003) and MMP13 (2.0 ± 0.8 versus 1.0 ± 0, mean difference 1.0 [95% CI 0.4 to 1.6]; p = 0.03) in the peracetic acid-ethanol combined irradiation group than in the control group. There was a higher amount of collagen Type I in tendons treated with peracetic acid-ethanol combined irradiation than in the control group (0.36 ± 0.03 versus 0.31 ± 0.04, mean difference 0.05 [95% CI 0.01 to 0.09]; p = 0.02). CONCLUSION Treatment with peracetic acid-ethanol combined irradiation did not have any discernible adverse effect on the histology, fiber diameter, enzymatic resistance, collagen content, or biomechanical strength of the allograft tendons compared with the control group. Peracetic acid-ethanol combined irradiation treatment had a positive impact on remodeling of the extracellular matrix and realignment of collagen fibers. CLINICAL RELEVANCE This sterilization method could be helpful to expand the scope and frequency with which allogeneic materials are applied. The long-term healing effect and strength of allograft tendons must be tested before clinical use, and it is necessary to conduct comparative studies on autografts and synthetic materials that are currently widely used clinically.
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Affiliation(s)
- Haoran Zhang
- Department of Bone Tumor, Tianjin Hospital, Tianjin, China
| | - Mingyou Xu
- Department of Orthopedics, The First Affiliated Hospital of University of Science and Technology of China, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China
| | - Yiwei Zhao
- Department of Orthopedic Surgery, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
| | - Zhiyi Li
- Department of Orthopedic Surgery, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
| | - Bingtai Han
- Department of Orthopedic Surgery, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
| | - Shengru Wang
- Department of Orthopedic Surgery, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
| | - Jingyu Zhang
- Department of Bone Tumor, Tianjin Hospital, Tianjin, China
| | - Jianguo Zhang
- Department of Orthopedic Surgery, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
| | - Yongcheng Hu
- Department of Bone Tumor, Tianjin Hospital, Tianjin, China
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Mlawer SJ, Frank EH, Connizzo BK. Aged tendons lack adaptive response to acute compressive injury. J Orthop Res 2024; 42:973-984. [PMID: 38041209 PMCID: PMC11009076 DOI: 10.1002/jor.25752] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Revised: 10/24/2023] [Accepted: 11/29/2023] [Indexed: 12/03/2023]
Abstract
Rotator cuff tendinopathy has a multifactorial etiology, with both aging and external compression found to influence disease progression. However, tendon's response to these factors is still poorly understood and in vivo animal models make it difficult to decouple these effects. Therefore, we developed an explant culture model that allows us to directly apply compression to tendons and then observe their biological responses. Using this model, we applied a single acute compressive injury to C57BL/6J flexor digitorum longus tendon explants and observed changes in viability, metabolic activity, matrix composition, matrix biosynthesis, matrix structure, gene expression, and mechanical properties. We hypothesized that a single acute compressive load would result in an injury response in tendon and that this effect would be amplified in aged tendons. We found that young tendons had increased matrix turnover with a decrease in small leucine-rich proteoglycans, increase in compression-resistant proteoglycan aggrecan, increase in collagen synthesis, and an upregulation of collagen-degrading MMP-9. Aged tendons lacked any of these adaptive responses and instead had decreased metabolic activity and collagen synthesis. This implies that aged tendons lack the adaptation mechanisms required to return to homeostasis, and therefore are at greater risk for compression-induced injury. Overall, we present a novel compressive injury model that demonstrates lasting age-dependent changes and has the potential to examine the long-term response of tendon to a variety of compressive loading conditions.
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Affiliation(s)
- Samuel J. Mlawer
- Department of Biomedical Engineering, Boston University, Boston, MA, 02215, United States
| | - Eliot H. Frank
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, United States
| | - Brianne K. Connizzo
- Department of Biomedical Engineering, Boston University, Boston, MA, 02215, United States
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Beaumont RE, Smith EJ, Zhou L, Marr N, Thorpe CT, Guest DJ. Exogenous interleukin-1 beta stimulation regulates equine tenocyte function and gene expression in three-dimensional culture which can be rescued by pharmacological inhibition of interleukin 1 receptor, but not nuclear factor kappa B, signaling. Mol Cell Biochem 2024; 479:1059-1078. [PMID: 37314623 PMCID: PMC11116237 DOI: 10.1007/s11010-023-04779-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Accepted: 05/27/2023] [Indexed: 06/15/2023]
Abstract
We investigated how Interleukin 1 beta (IL-1β) impacts equine tenocyte function and global gene expression in vitro and determined if these effects could be rescued by pharmacologically inhibiting nuclear factor-κB (NF-KB) or interleukin 1 signalling. Equine superficial digital flexor tenocytes were cultured in three-dimensional (3D) collagen gels and stimulated with IL-1β for two-weeks, with gel contraction and interleukin 6 (IL6) measured throughout and transcriptomic analysis performed at day 14. The impact of three NF-KB inhibitors on gel contraction and IL6 secretion were measured in 3D culture, with NF-KB-P65 nuclear translocation by immunofluorescence and gene expression by qPCR measured in two-dimensional (2D) monolayer culture. In addition, daily 3D gel contraction and transcriptomic analysis was performed on interleukin 1 receptor antagonist-treated 3D gels at day 14. IL-1β increased NF-KB-P65 nuclear translocation in 2D culture and IL6 secretion in 3D culture, but reduced daily tenocyte 3D gel contraction and impacted > 2500 genes at day 14, with enrichment for NF-KB signaling. Administering direct pharmacological inhibitors of NF-KB did reduce NF-KB-P65 nuclear translocation, but had no effect on 3D gel contraction or IL6 secretion in the presence of IL-1β. However, IL1Ra restored 3D gel contraction and partially rescued global gene expression. Tenocyte 3D gel contraction and gene expression is adversely impacted by IL-1β which can only be rescued by blockade of interleukin 1 receptor, but not NF-KB, signalling.
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Affiliation(s)
- Ross Eric Beaumont
- Clinical Sciences and Service, Royal Veterinary College, Hawkshead Lane, North Mymms, Hatfield, AL9 7TA, Herts, UK.
| | - Emily Josephine Smith
- Clinical Sciences and Service, Royal Veterinary College, Hawkshead Lane, North Mymms, Hatfield, AL9 7TA, Herts, UK
| | - Lexin Zhou
- Clinical Sciences and Service, Royal Veterinary College, Hawkshead Lane, North Mymms, Hatfield, AL9 7TA, Herts, UK
| | - Neil Marr
- Comparative Biomedical Sciences, Royal Veterinary College, Royal College Street, London, NW1 0TU, UK
| | - Chavaunne T Thorpe
- Comparative Biomedical Sciences, Royal Veterinary College, Royal College Street, London, NW1 0TU, UK
| | - Deborah Jane Guest
- Clinical Sciences and Service, Royal Veterinary College, Hawkshead Lane, North Mymms, Hatfield, AL9 7TA, Herts, UK
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5
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Sun Y, Sheng R, Cao Z, Liu C, Li J, Zhang P, Du Y, Mo Q, Yao Q, Chen J, Zhang W. Bioactive fiber-reinforced hydrogel to tailor cell microenvironment for structural and functional regeneration of myotendinous junction. SCIENCE ADVANCES 2024; 10:eadm7164. [PMID: 38657071 PMCID: PMC11042749 DOI: 10.1126/sciadv.adm7164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Accepted: 03/18/2024] [Indexed: 04/26/2024]
Abstract
Myotendinous junction (MTJ) injuries are prevalent in clinical practice, yet the treatment approaches are limited to surgical suturing and conservative therapy, exhibiting a high recurrence rate. Current research on MTJ tissue engineering is scarce and lacks in vivo evaluation of repair efficacy. Here, we developed a three-dimensional-printed bioactive fiber-reinforced hydrogel containing mesenchymal stem cells (MSCs) and Klotho for structural and functional MTJ regeneration. In a rat MTJ defect model, the bioactive fiber-reinforced hydrogel promoted the structural restoration of muscle, tendon, and muscle-tendon interface and enhanced the functional recovery of injured MTJ. In vivo proteomics and in vitro cell cultures elucidated the regenerative mechanisms of the bioactive fiber-reinforced hydrogel by modulating oxidative stress and inflammation, thus engineering an optimized microenvironment to support the survival and differentiation of transplanted MSCs and maintain the functional phenotype of resident cells within MTJ tissues, including tendon/muscle cells and macrophages. This strategy provides a promising treatment for MTJ injuries.
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Affiliation(s)
- Yuzhi Sun
- Department of Orthopaedic Surgery, Institute of Digital Medicine, Nanjing First Hospital, Nanjing Medical University, 210006 Nanjing, China
| | - Renwang Sheng
- School of Medicine, Southeast University, 210009 Nanjing, China
| | - Zhicheng Cao
- Department of Orthopaedic Surgery, Institute of Digital Medicine, Nanjing First Hospital, Nanjing Medical University, 210006 Nanjing, China
| | - Chuanquan Liu
- School of Medicine, Southeast University, 210009 Nanjing, China
| | - Jiaxiang Li
- Department of Orthopaedic Surgery, Institute of Digital Medicine, Nanjing First Hospital, Nanjing Medical University, 210006 Nanjing, China
| | - Po Zhang
- Department of Orthopaedic Surgery, Institute of Digital Medicine, Nanjing First Hospital, Nanjing Medical University, 210006 Nanjing, China
| | - Yan Du
- School of Medicine, Southeast University, 210009 Nanjing, China
| | - Qingyun Mo
- School of Medicine, Southeast University, 210009 Nanjing, China
| | - Qingqiang Yao
- Department of Orthopaedic Surgery, Institute of Digital Medicine, Nanjing First Hospital, Nanjing Medical University, 210006 Nanjing, China
- China Orthopedic Regenerative Medicine Group (CORMed), 310000 Hangzhou, China
| | - Jialin Chen
- School of Medicine, Southeast University, 210009 Nanjing, China
- China Orthopedic Regenerative Medicine Group (CORMed), 310000 Hangzhou, China
- Jiangsu Key Laboratory for Biomaterials and Devices, Southeast University, 210096 Nanjing, China
| | - Wei Zhang
- School of Medicine, Southeast University, 210009 Nanjing, China
- China Orthopedic Regenerative Medicine Group (CORMed), 310000 Hangzhou, China
- Jiangsu Key Laboratory for Biomaterials and Devices, Southeast University, 210096 Nanjing, China
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Liu Z, Han W, Meng J, Pi Y, Wu T, Fan Y, Guo Q, Hu X, Chen Y, Jiang W, Zhao F. Mohawk protects against tendon damage via suppressing Wnt/β-catenin pathway. Heliyon 2024; 10:e25658. [PMID: 38370202 PMCID: PMC10867664 DOI: 10.1016/j.heliyon.2024.e25658] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2023] [Revised: 01/31/2024] [Accepted: 01/31/2024] [Indexed: 02/20/2024] Open
Abstract
Degenerative tendon injuries are common clinical problems associated with overuse or aging, and understanding the mechanisms of tendon injury and regeneration can contribute to the study of tendon healing and repair. As a transcription factor, Mohawk (Mkx) is responsible for tendons development, yet, the roles of which in tendon damage remain mostly elusive. In this study, using Mkx overexpressed mice on long treadmill as an in vivo model and MkxOE Achilles tenocytes stimulated by equiaxial stretch as an in vitro model, we anaylsed the effects of Mkx overexpression on the tendon. Mkx and tendon tension strength were decreased after the expose to excessive mechanical forces, and Mkx overexpression protected the tendon from damage. Moreover, we revealed that the Wnt/β-catenin activation, inflammation, and Runx2 expression were increased at the injured Achilles tendon, upregulated Mkx significantly reversed the increased Wnt/β-catenin pathway, Tnf-α, Il-1β, and Il-6 levels, and reduced tendon cell damage. However, Wnt3a, IWR and BIO had not significantly affected the Mkx expression in achilles tenocytes. In conclusion, Mkx is involved in tendon healing and protects the tendon from damage through suppressing Wnt/β-catenin pathway, suggesting Mkx/Wnt/β-catenin pathway may be potential therapeutic targets for tendon damage.
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Affiliation(s)
- Ziming Liu
- Department of Sports Medicine, Sports Medicine Institute, Beijing Key Laboratory of Sports Injuries, Peking University Third Hospital, Beijing, China
- Engineering Research Center of Sports Trauma Treatment Technology and Devices, Ministry of Education, Peking University Third Hospital, Beijing, China
| | - Wenfeng Han
- Department of Orthopedics, General Hospital of Northern Theater Command, Shenyang, Liaoning, China
| | - Jiao Meng
- Department of Neurosurgery, Bijie Traditional Chinese Medical Hospital, Bijie, Guizhou, China
| | - Yanbing Pi
- Department of Sports Medicine, Sports Medicine Institute, Beijing Key Laboratory of Sports Injuries, Peking University Third Hospital, Beijing, China
- Engineering Research Center of Sports Trauma Treatment Technology and Devices, Ministry of Education, Peking University Third Hospital, Beijing, China
| | - Tong Wu
- Department of Sports Medicine, Sports Medicine Institute, Beijing Key Laboratory of Sports Injuries, Peking University Third Hospital, Beijing, China
- Engineering Research Center of Sports Trauma Treatment Technology and Devices, Ministry of Education, Peking University Third Hospital, Beijing, China
| | - Yifei Fan
- Department of Sports Medicine, Sports Medicine Institute, Beijing Key Laboratory of Sports Injuries, Peking University Third Hospital, Beijing, China
- Engineering Research Center of Sports Trauma Treatment Technology and Devices, Ministry of Education, Peking University Third Hospital, Beijing, China
| | - Qinwei Guo
- Department of Sports Medicine, Sports Medicine Institute, Beijing Key Laboratory of Sports Injuries, Peking University Third Hospital, Beijing, China
- Engineering Research Center of Sports Trauma Treatment Technology and Devices, Ministry of Education, Peking University Third Hospital, Beijing, China
| | - Xiaoqing Hu
- Department of Sports Medicine, Sports Medicine Institute, Beijing Key Laboratory of Sports Injuries, Peking University Third Hospital, Beijing, China
- Engineering Research Center of Sports Trauma Treatment Technology and Devices, Ministry of Education, Peking University Third Hospital, Beijing, China
| | - Yuhua Chen
- Department of Neurosurgery, Bijie Traditional Chinese Medical Hospital, Bijie, Guizhou, China
| | - Wenxiao Jiang
- Department of Sports Medicine, Qilu Hospital of Shandong University (Qingdao Campus), Qingdao, Shandong, China
| | - Feng Zhao
- Department of Sports Medicine, Sports Medicine Institute, Beijing Key Laboratory of Sports Injuries, Peking University Third Hospital, Beijing, China
- Engineering Research Center of Sports Trauma Treatment Technology and Devices, Ministry of Education, Peking University Third Hospital, Beijing, China
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Zhang S, Shang J, Gu Z, Gu X, Wang F, Hu X, Wu G, Zou H, Ruan J, He X, Bao C, Zhang Z, Li X, Chen H. Global research trends and hotspots on tendon-derived stem cell: a bibliometric visualization study. Front Bioeng Biotechnol 2024; 11:1327027. [PMID: 38260747 PMCID: PMC10801434 DOI: 10.3389/fbioe.2023.1327027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Accepted: 12/11/2023] [Indexed: 01/24/2024] Open
Abstract
Purpose: This study was aimed to examine the global research status and current research hotspots in the field of tendon stem cells. Methods: Bibliometric methods were employed to retrieve relevant data from the Web of Science Core Collection (WOSCC) database. Additionally, Citespace, Vosviewer, SCImago, and Graphad Prism were utilized to analyze the publication status in this field, identify the current research hotspots, and present a mini-review. Results: The most active countries in this field were China and the United States. Notable authors contributing significantly to this research included Lui Pauline Po Yee, Tang Kanglai, Zhang Jianying, Yin Zi, and Chen Xiao, predominantly affiliated with institutions such as the Hong Kong Hospital Authority, Third Military Medical University, University of Pittsburgh, and Zhejiang University. The most commonly published journals in this field were Stem Cells International, Journal of Orthopedic Research, and Stem Cell Research and Therapy. Moreover, the current research hotspots primarily revolved around scaffolds, molecular mechanisms, and inflammation regulation. Conclusion: Tendon stem cells hold significant potential as seed cells for tendon tissue engineering and offer promising avenues for further research Scaffolds, molecular mechanisms and inflammation regulation are currently research hotspots in this field.
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Affiliation(s)
- Songou Zhang
- Department of Clinical Medicine, Health Science Center, Ningbo University, Ningbo, Zhejiang, China
| | - Jinxiang Shang
- Department of Orthopedics, Affiliated Hospital of Shaoxing University, Shaoxing, Zhejiang, China
| | - Zhiqian Gu
- Department of Clinical Medicine, Health Science Center, Ningbo University, Ningbo, Zhejiang, China
| | - Xiaopeng Gu
- Department of Clinical Medicine, Health Science Center, Ningbo University, Ningbo, Zhejiang, China
| | - Fei Wang
- Department of Orthopedics, Shaoxing People’s Hospital, Shaoxing, Zhejiang, China
| | - Xujun Hu
- Department of Orthopedics, Shaoxing People’s Hospital, Shaoxing, Zhejiang, China
| | - Guoliang Wu
- Department of Clinical Medicine, Health Science Center, Ningbo University, Ningbo, Zhejiang, China
| | - Huan Zou
- Department of Orthopedics, Ningbo Sixth Hospital, Ningbo, Zhejiang, China
| | - Jian Ruan
- Department of Orthopedics, Ningbo Sixth Hospital, Ningbo, Zhejiang, China
| | - Xinkun He
- Department of Orthopedics, Ningbo Sixth Hospital, Ningbo, Zhejiang, China
| | - Chenzhou Bao
- Department of Orthopedics, Ningbo Sixth Hospital, Ningbo, Zhejiang, China
| | - ZhenYu Zhang
- Department of Clinical Medicine, School of Medicine, Shaoxing University, Shaoxing, Zhejiang, China
| | - Xin Li
- Department of Clinical Medicine, School of Medicine, Shaoxing University, Shaoxing, Zhejiang, China
| | - Hong Chen
- Department of Orthopedics, Ningbo Sixth Hospital, Ningbo, Zhejiang, China
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8
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Aggouras AN, Connizzo BK. Earlier proteoglycan turnover promotes higher efficiency matrix remodeling in MRL/MpJ tendons. J Orthop Res 2023; 41:2261-2272. [PMID: 36866831 PMCID: PMC10475140 DOI: 10.1002/jor.25542] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 01/20/2023] [Accepted: 03/01/2023] [Indexed: 03/04/2023]
Abstract
While most mammalian tissue regeneration is limited, the Murphy Roths Large (MRL/MpJ) mouse has been identified to regenerate several tissues, including tendon. Recent studies have indicated that this regenerative response is innate to the tendon tissue and not reliant on a systemic inflammatory response. Therefore, we hypothesized that MRL/MpJ mice may also exhibit a more robust homeostatic regulation of tendon structure in response to mechanical loading. To assess this, MRL/MpJ and C57BL/6J flexor digitorum longus tendon explants were subjected to stress-deprived conditions in vitro for up to 14 days. Explant tendon health (metabolism, biosynthesis, and composition), matrix metalloproteinase (MMP) activity, gene expression, and tendon biomechanics were assessed periodically. We found a more robust response to the loss of mechanical stimulus in the MRL/MpJ tendon explants, exhibiting an increase in collagen production and MMP activity consistent with previous in vivo studies. This greater collagen turnover was preceded by an early expression of small leucine-rich proteoglycans and proteoglycan-degrading MMP-3, promoting efficient regulation and organization of newly synthesized collagen and allowing for more efficient overall turnover in MRL/MpJ tendons. Therefore, mechanisms of MRL/MpJ matrix homeostasis may be fundamentally different from that of B6 tendons and may indicate better recovery from mechanical microdamage in MRL/MpJ tendons. We demonstrate here the utility of the MRL/MpJ model in elucidating mechanisms of efficient matrix turnover and its potential to shed light on new targets for more effective treatments for degenerative matrix changes brought about by injury, disease, or aging.
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Affiliation(s)
- Anthony N. Aggouras
- Department of Biomedical Engineering, Boston University, Boston, MA, 02215, United States
| | - Brianne K. Connizzo
- Department of Biomedical Engineering, Boston University, Boston, MA, 02215, United States
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9
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Li H, Luo S, Li H, Pan H, Jiang L, Chen Y, Chen H, Feng Z, Li S. From fetal tendon regeneration to adult therapeutic modalities: TGF-β3 in scarless healing. Regen Med 2023; 18:809-822. [PMID: 37671630 DOI: 10.2217/rme-2023-0145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/07/2023] Open
Abstract
Tendon injuries are common disorders that can significantly impact people's lives. Unfortunately, the limited regenerative ability of tendons results in tissue healing in a scar-mediated manner. The current therapeutic strategies fail to fully recover the functions of the injured tendons, and as such, the conception of 'scarless healing' has gained prominent attention in the field of regenerative medicine. Interestingly, injured fetal tendons possess the capability to heal through regeneration, which builds an ideal blueprint for adult tendon regeneration. Studies have shown that fetal biochemical cues have the potential to improve adult tendon healing. Here we review the biological factors that contribute to fetal tendon regeneration and how manipulation of these biochemical cues in the adult tendon healing process could achieve regeneration.
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Affiliation(s)
- Hanyue Li
- School of Physical Education, Southwest Medical University, Luzhou, China
| | - Shengyu Luo
- School of Physical Education, Southwest Medical University, Luzhou, China
| | - Hongtao Li
- Department of Spinal Surgery, The Affiliated Traditional Chinese Medicine Hospital of Southwest Medical University, Sichuan, China
| | - Hongyu Pan
- Department of Spinal Surgery, The Affiliated Traditional Chinese Medicine Hospital of Southwest Medical University, Sichuan, China
| | - Li Jiang
- School of Physical Education, Southwest Medical University, Luzhou, China
| | - Yixuan Chen
- School of Physical Education, Southwest Medical University, Luzhou, China
| | - Hui Chen
- Geriatric department, The Affiliated Traditional Chinese Medicine Hospital of Southwest Medical University, Sichuan, China
| | - Zhenhua Feng
- Division of Spine Surgery, Department of Orthopedic Surgery, Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University
| | - Sen Li
- School of Physical Education, Southwest Medical University, Luzhou, China
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10
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Data K, Kulus M, Ziemak H, Chwarzyński M, Piotrowska-Kempisty H, Bukowska D, Antosik P, Mozdziak P, Kempisty B. Decellularization of Dense Regular Connective Tissue-Cellular and Molecular Modification with Applications in Regenerative Medicine. Cells 2023; 12:2293. [PMID: 37759515 PMCID: PMC10528602 DOI: 10.3390/cells12182293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Revised: 08/31/2023] [Accepted: 09/14/2023] [Indexed: 09/29/2023] Open
Abstract
Healing of dense regular connective tissue, due to a high fiber-to-cell ratio and low metabolic activity and regeneration potential, frequently requires surgical implantation or reconstruction with high risk of reinjury. An alternative to synthetic implants is using bioscaffolds obtained through decellularization, a process where the aim is to extract cells from the tissue while preserving the tissue-specific native molecular structure of the ECM. Proteins, lipids, nucleic acids and other various extracellular molecules are largely involved in differentiation, proliferation, vascularization and collagen fibers deposit, making them the crucial processes in tissue regeneration. Because of the multiple possible forms of cell extraction, there is no standardized protocol in dense regular connective tissue (DRCT). Many modifications of the structure, shape and composition of the bioscaffold have also been described to improve the therapeutic result following the implantation of decellularized connective tissue. The available data provide a valuable source of crucial information. However, the wide spectrum of decellularization makes it important to understand the key aspects of bioscaffolds relative to their potential use in tissue regeneration.
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Affiliation(s)
- Krzysztof Data
- Division of Anatomy, Department of Human Morphology and Embryology, Wroclaw Medical University, 50-368 Wroclaw, Poland
| | - Magdalena Kulus
- Department of Veterinary Surgery, Institute of Veterinary Medicine, Nicolaus Copernicus University in Torun, 87-100 Torun, Poland
| | - Hanna Ziemak
- Department of Veterinary Surgery, Institute of Veterinary Medicine, Nicolaus Copernicus University in Torun, 87-100 Torun, Poland
| | - Mikołaj Chwarzyński
- Department of Veterinary Surgery, Institute of Veterinary Medicine, Nicolaus Copernicus University in Torun, 87-100 Torun, Poland
| | - Hanna Piotrowska-Kempisty
- Department of Toxicology, Poznan University of Medical Sciences, 60-631 Poznan, Poland
- Department of Basic and Preclinical Sciences, Institute of Veterinary Medicine, Nicolaus Copernicus University in Torun, 87-100 Torun, Poland
| | - Dorota Bukowska
- Department of Diagnostics and Clinical Sciences, Institute of Veterinary Medicine, Nicolaus Copernicus University in Torun, 87-100 Torun, Poland
| | - Paweł Antosik
- Department of Veterinary Surgery, Institute of Veterinary Medicine, Nicolaus Copernicus University in Torun, 87-100 Torun, Poland
| | - Paul Mozdziak
- Physiolgy Graduate Faculty, North Carolina State University, Raleigh, NC 27695, USA
- Prestage Department of Poultry Sciences, North Carolina State University, Raleigh, NC 27695, USA
| | - Bartosz Kempisty
- Division of Anatomy, Department of Human Morphology and Embryology, Wroclaw Medical University, 50-368 Wroclaw, Poland
- Department of Veterinary Surgery, Institute of Veterinary Medicine, Nicolaus Copernicus University in Torun, 87-100 Torun, Poland
- Physiolgy Graduate Faculty, North Carolina State University, Raleigh, NC 27695, USA
- Department of Obstetrics and Gynecology, University Hospital and Masaryk University, 601 77 Brno, Czech Republic
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Wei Y, Yun X, Guan Y, Cao S, Li X, Wang Y, Meng H, Liu Y, Quan Q, Wei M. Wnt3a-Modified Nanofiber Scaffolds Facilitate Tendon Healing by Driving Macrophage Polarization during Repair. ACS APPLIED MATERIALS & INTERFACES 2023; 15:9010-9023. [PMID: 36758166 DOI: 10.1021/acsami.2c20386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Inflammation is part of the natural healing response, but persistent inflammatory events tend to contribute to pathology changes of tendon or ligament. Phenotypic switching of macrophages within the inflammatory niche is crucial for tendon healing. One viable strategy to improve the functional and biomechanical properties of ruptured tendons is to modulate the transition from inflammatory to regenerative signals during tendon regeneration at the site of injury. Here, we developed a tendon repair scaffold made of biodegradable polycaprolactone by electrospinning, which was modified to deliver Wnt3a protein and served as an implant to improve tendon healing in a rat model of Achilles tendon defect. During the in vitro study, Wnt3a protein promoted the polarization of M2 macrophages. In the in vivo experiment, Wnt3a scaffold promoted the early recruitment and counting curve of macrophages and increased the proportion of M2 macrophages. Achilles function index and mechanical properties showed that the implantation effect of the Wnt3a group was better than that of the control group. We believe that this type of scaffold can be used to repair tendon defects. This work highlights the beneficial role of local delivery of biological factors in directing inflammatory responses toward regenerative strategies in tendon healing.
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Affiliation(s)
- Yu Wei
- Department of Orthopedic Surgery, the Fourth Medical Center of Chinese PLA General Hospital, Beijing 100142, China
| | - Xing Yun
- Department of Orthopedic Surgery, the Fourth Medical Center of Chinese PLA General Hospital, Beijing 100142, China
| | - Yanjun Guan
- Department of Orthopedic Surgery, the Fourth Medical Center of Chinese PLA General Hospital, Beijing 100142, China
- Department of Orthopedic Surgery, Key Laboratory of Musculoskeletal Trauma &War Injuries PLA, Beijing Key Lab of Regenerative Medicine in Orthopedics, Chinese PLA General Hospital, Beijing 100853, China
| | - Shunze Cao
- Department of Engineering Mechanics, Tsinghua University, 100084 Beijing, China
| | - Xiangling Li
- Department of Orthopedic Surgery, the Fourth Medical Center of Chinese PLA General Hospital, Beijing 100142, China
- Department of Orthopedic Surgery, Key Laboratory of Musculoskeletal Trauma &War Injuries PLA, Beijing Key Lab of Regenerative Medicine in Orthopedics, Chinese PLA General Hospital, Beijing 100853, China
| | - Yu Wang
- Department of Orthopedic Surgery, the Fourth Medical Center of Chinese PLA General Hospital, Beijing 100142, China
- Department of Orthopedic Surgery, Key Laboratory of Musculoskeletal Trauma &War Injuries PLA, Beijing Key Lab of Regenerative Medicine in Orthopedics, Chinese PLA General Hospital, Beijing 100853, China
| | - Haoye Meng
- Department of Orthopedic Surgery, the Fourth Medical Center of Chinese PLA General Hospital, Beijing 100142, China
- Department of Orthopedic Surgery, Key Laboratory of Musculoskeletal Trauma &War Injuries PLA, Beijing Key Lab of Regenerative Medicine in Orthopedics, Chinese PLA General Hospital, Beijing 100853, China
| | - Yujie Liu
- Department of Orthopedic Surgery, the Fourth Medical Center of Chinese PLA General Hospital, Beijing 100142, China
| | - Qi Quan
- Department of Orthopedic Surgery, the Fourth Medical Center of Chinese PLA General Hospital, Beijing 100142, China
- Department of Orthopedic Surgery, Key Laboratory of Musculoskeletal Trauma &War Injuries PLA, Beijing Key Lab of Regenerative Medicine in Orthopedics, Chinese PLA General Hospital, Beijing 100853, China
| | - Min Wei
- Department of Orthopedic Surgery, the Fourth Medical Center of Chinese PLA General Hospital, Beijing 100142, China
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12
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Leukocyte and Platelet-Rich Plasma (L-PRP) in Tendon Models: A Systematic Review and Meta-Analysis of in vivo/ in vitro Studies. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2022; 2022:5289145. [PMID: 36569346 PMCID: PMC9780014 DOI: 10.1155/2022/5289145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 11/16/2022] [Accepted: 12/07/2022] [Indexed: 12/23/2022]
Abstract
Purpose To perform a systematic review on the application of leukocyte- and platelet-rich plasma (L-PRP) in tendon models by reviewing in vivo/in vitro studies. Methods The searches were performed via electronic databases including PubMed, Embase, and Cochrane Library up to September 2022 using the following keywords: ((tenocytes OR tendon OR tendinitis OR tendinosis OR tendinopathy OR tendon injury) AND (platelet-rich plasma OR PRP OR autologous conditioned plasma OR leukocyte- and platelet-rich plasma OR L-PRP OR leukocyte-richplatelet-rich plasma Lr-PRP)). Only in vitro and in vivo studies that assessed the potential effects of L-PRP on tendons and/or tenocytes are included in this study. Description of PRP, study design and methods, outcomes measured, and results are extracted from the data. Results A total of 17 studies (8 in vitro studies and 9 in vivo studies) are included. Thirteen studies (76%) reported leukocyte concentrations of L-PRP. Four studies (24%) reported the commercial kits. In in vitro studies, L-PRP demonstrated increased cell proliferation, cell migration, collagen synthesis, accelerated inflammation, and catabolic response in the short term. In addition, most in vivo studies indicated increased collagen type I content. According to in vivo studies reporting data, L-PRP reduced inflammation response in 71.0% of studies, while it enhanced the histological quality of tendons in 67.0% of studies. All 3 studies reporting data found increased biomechanical properties with L-PRP treatment. Conclusions Most evidence indicates that L-PRP has some potential effects on tendon healing compared to control. However, it appears that L-PRP works depending on the biological status of the damaged tendon. At an early stage, L-PRP may accelerate tendon healing, but at a later stage, it could be detrimental.
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13
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Muscat S, Nichols AEC, Gira E, Loiselle AE. CCR2 is expressed by tendon resident macrophage and T cells, while CCR2 deficiency impairs tendon healing via blunted involvement of tendon-resident and circulating monocytes/macrophages. FASEB J 2022; 36:e22607. [PMID: 36250393 PMCID: PMC9593314 DOI: 10.1096/fj.202201162r] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 09/13/2022] [Accepted: 09/29/2022] [Indexed: 11/11/2022]
Abstract
During tendon healing, macrophages are thought to be a key mediator of scar tissue formation, which prevents successful functional restoration of the tendon. However, macrophages are critical for successful tendon healing as they aid in wound debridement, extracellular matrix deposition, and promote fibroblast proliferation. Recent work has sought to better define the multi-faceted functions of macrophages using depletion studies, while other studies have identified a tendon resident macrophage population. To begin to delineate the functions of tendon-resident versus circulation-derived macrophages, we examined the tendon healing phenotype in Chemokine Receptor 2 (CCR2) reporter (CCR2GFP/+ ), and knockout mice. CCR2 is a chemokine receptor primarily found on the surface of circulating bone marrow-derived monocytes, with CCR2 being an important mediator of macrophage recruitment to wound environments. Surprisingly, CCR2GFP/+ cells were present in the tendon during adult homeostasis, and single-cell RNA sequencing identified these cells as tendon-resident macrophages and T cells. During both homeostasis and healing, CCR2 knockout resulted in a substantial decrease in CCR2GFP+ cells and pan-macrophages. Additionally, loss of CCR2 resulted in reduced numbers of myofibroblasts and impeded functional recovery during late healing. This study highlights the heterogeneity of tendon-resident and recruited immune cells and their contributions following injury, and establishes an important role for CCR2 in modulating both the adult tendon cell environment and tendon healing process.
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Affiliation(s)
- Samantha Muscat
- Center for Musculoskeletal Research, Department of Orthopaedics & Rehabilitation, University of Rochester Medical Center, Rochester, New York, USA
| | - Anne E C Nichols
- Center for Musculoskeletal Research, Department of Orthopaedics & Rehabilitation, University of Rochester Medical Center, Rochester, New York, USA
| | - Emma Gira
- Center for Musculoskeletal Research, Department of Orthopaedics & Rehabilitation, University of Rochester Medical Center, Rochester, New York, USA
| | - Alayna E Loiselle
- Center for Musculoskeletal Research, Department of Orthopaedics & Rehabilitation, University of Rochester Medical Center, Rochester, New York, USA
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14
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Korcari A, Muscat S, McGinn E, Buckley MR, Loiselle AE. Depletion of Scleraxis-lineage cells during tendon healing transiently impairs multi-scale restoration of tendon structure during early healing. PLoS One 2022; 17:e0274227. [PMID: 36240193 PMCID: PMC9565440 DOI: 10.1371/journal.pone.0274227] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2022] [Accepted: 08/23/2022] [Indexed: 11/18/2022] Open
Abstract
Tendons are composed of a heterogeneous cell environment, with Scleraxis-lineage (ScxLin) cells being the predominant population. Although ScxLin cells are required for maintenance of tendon homeostasis, their functions during tendon healing are unknown. To this end, we first characterized the spatiotemporal dynamics of ScxLin cells during tendon healing, and identified that the overall ScxLin pool continuously expands up to early remodeling healing phase. To better define the function of ScxLin cells during the late proliferative phase of healing, we inducibly depleted ScxLin cells from day 14-18 post-surgery using the Scx-Cre; Rosa-DTR mouse model, with local administration of diphtheria toxin inducing apoptosis of ScxLin cells in the healing tendon. At D28 post-surgery, ScxLin cell depleted tendons (DTRScxLin) had substantial impairments in structure and function, relative to WT, demonstrating the importance of ScxLin cells during tendon healing. Next, bulk RNAseq was utilized to identify the underlying mechanisms that were impaired with depletion and revealed that ScxLin depletion induced molecular and morphological stagnation of the healing process at D28. However, this stagnation was transient, such that by D56 tendon mechanics in DTRScxLin were not significantly different than wildtype repairs. Collectively, these data offer fundamental knowledge on the dynamics and roles of ScxLin cells during tendon healing.
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Affiliation(s)
- Antonion Korcari
- Department of Orthopaedics & Rehabilitation, Center for Musculoskeletal Research, University of Rochester Medical Center, Rochester, NY, United States of America
- Department of Biomedical Engineering, University of Rochester, Rochester, NY, United States of America
| | - Samantha Muscat
- Department of Orthopaedics & Rehabilitation, Center for Musculoskeletal Research, University of Rochester Medical Center, Rochester, NY, United States of America
| | - Elizabeth McGinn
- Department of Orthopaedics & Rehabilitation, Center for Musculoskeletal Research, University of Rochester Medical Center, Rochester, NY, United States of America
- Department of Biomedical Engineering, University of Rochester, Rochester, NY, United States of America
| | - Mark R. Buckley
- Department of Orthopaedics & Rehabilitation, Center for Musculoskeletal Research, University of Rochester Medical Center, Rochester, NY, United States of America
- Department of Biomedical Engineering, University of Rochester, Rochester, NY, United States of America
| | - Alayna E. Loiselle
- Department of Orthopaedics & Rehabilitation, Center for Musculoskeletal Research, University of Rochester Medical Center, Rochester, NY, United States of America
- Department of Biomedical Engineering, University of Rochester, Rochester, NY, United States of America
- * E-mail:
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15
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Huegel J, Chan PY, Weiss SN, Nuss CA, Raja H, Waldorff EI, Zhang N, Ryaby JT, Soslowsky LJ, Kuntz AF. Pulsed electromagnetic field therapy alters early healing in a rat model of rotator cuff injury and repair: Potential mechanisms. J Orthop Res 2022; 40:1593-1603. [PMID: 34657312 PMCID: PMC9013393 DOI: 10.1002/jor.25185] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Revised: 08/26/2021] [Accepted: 09/30/2021] [Indexed: 02/04/2023]
Abstract
Rotator cuff repair failure remains common due to poor tendon healing, particularly at the enthesis. We previously showed that pulsed electromagnetic field (PEMF) therapy improved the mechanical properties of the rat supraspinatus tendon postoperatively. However, little is known about the mechanisms behind PEMF-dependent contributions to improved healing in this injury model. The objective of this study was to determine the influence of PEMF treatment on tendon gene expression and cell composition, as well as bone microarchitecture and dynamic bone metabolism during early stages of healing. We hypothesized that PEMF treatment would amplify tendon-healing related signaling pathways while mitigating inflammation and improve bone metabolism at the repair site. Rats underwent rotator cuff injury and repair followed by assignment to either control (non-PEMF) or PEMF treatment groups. Gene and protein expression as well as tendon and bone histological assessments were performed 3, 7, 14, 21, and 28 days after injury. Gene expression data demonstrated an upregulation in the bone morphogenetic protein 2 signaling pathway and increases in pro-osteogenic genes at the insertion, supporting important processes to re-establish the tendon-bone interface. PEMF also downregulated genes related to a fibrotic healing response. Anti-inflammatory effects were demonstrated by both gene expression and macrophage phenotype. PEMF significantly increased the rate of kinetic bone formation directly adjacent to the tendon enthesis as well as the number of cuboidal surface osteoblasts (active osteoblasts) in the humeral head. This study has provided insight into how PEMF affects cellular and molecular processes in the supraspinatus tendon and adjacent bone after injury and repair.
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Affiliation(s)
- Julianne Huegel
- McKay Orthopaedic Research Laboratory, University of Pennsylvania, Philadelphia, PA USA
| | - Peter Y.W. Chan
- McKay Orthopaedic Research Laboratory, University of Pennsylvania, Philadelphia, PA USA
| | - Stephanie N. Weiss
- McKay Orthopaedic Research Laboratory, University of Pennsylvania, Philadelphia, PA USA
| | - Courtney A. Nuss
- McKay Orthopaedic Research Laboratory, University of Pennsylvania, Philadelphia, PA USA
| | - Harina Raja
- McKay Orthopaedic Research Laboratory, University of Pennsylvania, Philadelphia, PA USA
| | | | | | | | - Louis J. Soslowsky
- McKay Orthopaedic Research Laboratory, University of Pennsylvania, Philadelphia, PA USA,Department of Orthopaedic Surgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA USA
| | - Andrew F. Kuntz
- McKay Orthopaedic Research Laboratory, University of Pennsylvania, Philadelphia, PA USA,Department of Orthopaedic Surgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA USA
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16
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Wang K, Cheng L, He B. Therapeutic effects of asperosaponin VI in rabbit tendon disease. Regen Ther 2022; 20:1-8. [PMID: 35310016 PMCID: PMC8898761 DOI: 10.1016/j.reth.2022.02.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2021] [Revised: 01/25/2022] [Accepted: 02/03/2022] [Indexed: 01/20/2023] Open
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17
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Jiang H, Lin X, Liang W, Li Y, Yu X. Friedelin Alleviates the Pathogenesis of Collagenase-Induced Tendinopathy in Mice by Promoting the Selective Autophagic Degradation of p65. Nutrients 2022; 14:1673. [PMID: 35458235 PMCID: PMC9031956 DOI: 10.3390/nu14081673] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Revised: 03/29/2022] [Accepted: 04/13/2022] [Indexed: 02/06/2023] Open
Abstract
With the development of an aging population, tendinopathy has become a common musculoskeletal disease in the elderly with a high recurrence rate and no curative treatment. The inflammation mediated by NF-κB signaling plays an important role in tendon senescence and degeneration. Friedelin (FR) is a triterpenoid derived from green plants, which has a variety of pharmacological functions, such as analgesia, anti-inflammation, antioxidation, and anti-tumor functions. However, the role and mechanism of FR in tendinopathy are unclear. Here, we found that FR improved the mechanical strength of the Achilles tendon, restored the orderly arrangement of collagen fibers, reduced inflammatory cell infiltration, and promoted tenogenesis, thereby blocking the progression of tendinopathy. Mechanistically, FR promoted the autophagic degradation of p65 by enhancing the interaction between p62 and p65 and effectively inhibited the activation of the NF-κB pathway, thus alleviating the inflammatory response of tenocytes. In addition, FR recruited E3 ubiquitin enzyme RNF182 to increase the K48-linked ubiquitination of p65 and promoted p62-mediated autophagic degradation. Furthermore, blocking ubiquitination reversed the degradation of p65 by FR. Therefore, these findings identify the new pharmacological mechanism of the anti-inflammatory effect of FR and provide a new candidate drug for the treatment of tendinopathy.
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Affiliation(s)
- Huaji Jiang
- Department of Immunology, School of Basic Medical Sciences, Southern Medical University, Guangzhou 510515, China
- Department of Orthopaedics, Yuebei People’s Hospital Affiliated to Medical College of Shantou University, Shaoguan 512026, China
| | - Xuemei Lin
- Department of Pediatric Orthopedics, Guangzhou Women and Children’s Medical Center, Guangzhou Medical University, Guangzhou 510623, China;
| | - Wei Liang
- Department of Orthopaedics, Yuebei People’s Hospital Affiliated to Medical College of Shantou University, Shaoguan 512026, China;
| | - Yiqiang Li
- Department of Pediatric Orthopedics, Guangzhou Women and Children’s Medical Center, Guangzhou Medical University, Guangzhou 510623, China
| | - Xiao Yu
- Department of Immunology, School of Basic Medical Sciences, Southern Medical University, Guangzhou 510515, China
- Guangdong Provincial Key Lab of Single Cell Technology and Application, Southern Medical University, Guangzhou 510515, China
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18
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Roth SP, Burk J, Brehm W, Troillet A. MSC in Tendon and Joint Disease: The Context-Sensitive Link Between Targets and Therapeutic Mechanisms. Front Bioeng Biotechnol 2022; 10:855095. [PMID: 35445006 PMCID: PMC9015188 DOI: 10.3389/fbioe.2022.855095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Accepted: 03/07/2022] [Indexed: 12/04/2022] Open
Abstract
Mesenchymal stromal cells (MSC) represent a promising treatment option for tendon disorders and joint diseases, primarily osteoarthritis. Since MSC are highly context-sensitive to their microenvironment, their therapeutic efficacy is influenced by their tissue-specific pathologically altered targets. These include not only cellular components, such as resident cells and invading immunocompetent cells, but also components of the tissue-characteristic extracellular matrix. Although numerous in vitro models have already shown potential MSC-related mechanisms of action in tendon and joint diseases, only a limited number reflect the disease-specific microenvironment and allow conclusions about well-directed MSC-based therapies for injured tendon and joint-associated tissues. In both injured tissue types, inflammatory processes play a pivotal pathophysiological role. In this context, MSC-mediated macrophage modulation seems to be an important mode of action across these tissues. Additional target cells of MSC applied in tendon and joint disorders include tenocytes, synoviocytes as well as other invading and resident immune cells. It remains of critical importance whether the context-sensitive interplay between MSC and tissue- and disease-specific targets results in an overall promotion or inhibition of the desired therapeutic effects. This review presents the authors’ viewpoint on disease-related targets of MSC therapeutically applied in tendon and joint diseases, focusing on the equine patient as valid animal model.
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Affiliation(s)
- Susanne Pauline Roth
- Veterinary Teaching Hospital, Department for Horses, Veterinary Faculty, University of Leipzig, Leipzig, Germany
| | - Janina Burk
- Equine Clinic (Surgery, Orthopedics), Justus-Liebig-University Giessen, Giessen, Germany
| | - Walter Brehm
- Veterinary Teaching Hospital, Department for Horses, Veterinary Faculty, University of Leipzig, Leipzig, Germany
| | - Antonia Troillet
- Clinic for Horses, Ludwig-Maximilians-University of Munich, Munich, Germany
- *Correspondence: Antonia Troillet,
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Kim DH, Noh SU, Chae SW, Kim SJ, Lee YT. Altered Differentiation of Tendon-Derived Stem Cells in Diabetic Conditions Mediated by Macrophage Migration Inhibitory Factor. Int J Mol Sci 2021; 22:ijms22168983. [PMID: 34445689 PMCID: PMC8396498 DOI: 10.3390/ijms22168983] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Revised: 08/14/2021] [Accepted: 08/16/2021] [Indexed: 12/17/2022] Open
Abstract
The purpose of our study was to evaluate the role of macrophage migration inhibitory factor (MIF) in the differentiation of tendon-derived stem cells (TdSCs) under hyperglycemic conditions. In the in vivo experiment, rats were classified into diabetic (DM) and non-DM groups depending on the intraperitoneal streptozotocin (STZ) or saline injection. Twelve-week after STZ injection, the supraspinatus tendon was harvested and prepared for histological evaluation and real-time reverse transcription polymerase chain reaction for osteochondrogenic (aggrecan, BMP-2, and Sox9) and tenogenic (Egr1, Mkx, scleraxis, type 1 collagen, and Tnmd) markers. For the in vitro experiment, TdSCs were isolated from healthy rat Achilles tendons. Cultured TdSCs were treated with methylglyoxal and recombinant MIF or MIF gene knockdown to determine the effect of hyperglycemic conditions and MIF on the differentiation function of TdSCs. These conditions were classified into four groups: hyperglycemic-control group, hyperglycemic-recombinant-MIF group, hyperglycemic-knockdown-MIF group, and normal-control group. The mRNA expression of osteochondrogenic and tenogenic markers was compared among the groups. In the in vivo experiment, the mRNA expression of all osteochondrogenic and tenogenic differentiation markers in the DM group was significantly higher and lower than that in the non-DM group, respectively. Similarly, in the in vitro experiments, the expression of all osteochondrogenic and tenogenic differentiation markers was significantly upregulated and downregulated, respectively, in the hyperglycemic-control group compared to that in the normal-control group. The hyperglycemic-knockdown-MIF group demonstrated significantly decreased expression of all osteochondrogenic differentiation markers and increased expression of only some tenogenic differentiation markers compared with the hyperglycemic-control group. In contrast, the hyperglycemic-recombinant-MIF group showed significantly increased expression of all osteochondrogenic differentiation markers, but no significant difference in any tenogenic marker level, compared to the hyperglycemic-control group. These results suggest that tendon homeostasis could be affected by hyperglycemic conditions, and MIF appears to alter the differentiation of TdSCs via enhancement of the osteochondrogenic differentiation in hyperglycemic conditions. These are preliminary findings, and must be confirmed in a further study.
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Affiliation(s)
- Du-Hwan Kim
- Department of Physical Medicine and Rehabilitation, College of Medicine, Chung-Ang University, Seoul 06973, Korea;
| | - Sun-Up Noh
- Medical Research Institute, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul 03181, Korea;
| | - Seoung-Wan Chae
- Department of Pathology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul 03181, Korea;
| | - Sang-Jun Kim
- Seoul Jun Research Center, Seoul Jun Rehabilitation Clinic, Seoul 06737, Korea;
| | - Yong-Taek Lee
- Medical Research Institute, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul 03181, Korea;
- Department of Physical and Rehabilitation Medicine, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul 03181, Korea
- Correspondence: ; Tel.: +82-2-2001-2472
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