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Cenni V, Sabatelli P, Di Martino A, Merlini L, Antoniel M, Squarzoni S, Neri S, Santi S, Metti S, Bonaldo P, Faldini C. Collagen VI Deficiency Impairs Tendon Fibroblasts Mechanoresponse in Ullrich Congenital Muscular Dystrophy. Cells 2024; 13:378. [PMID: 38474342 DOI: 10.3390/cells13050378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Revised: 02/06/2024] [Accepted: 02/19/2024] [Indexed: 03/14/2024] Open
Abstract
The pericellular matrix (PCM) is a specialized extracellular matrix that surrounds cells. Interactions with the PCM enable the cells to sense and respond to mechanical signals, triggering a proper adaptive response. Collagen VI is a component of muscle and tendon PCM. Mutations in collagen VI genes cause a distinctive group of inherited skeletal muscle diseases, and Ullrich congenital muscular dystrophy (UCMD) is the most severe form. In addition to muscle weakness, UCMD patients show structural and functional changes of the tendon PCM. In this study, we investigated whether PCM alterations due to collagen VI mutations affect the response of tendon fibroblasts to mechanical stimulation. By taking advantage of human tendon cultures obtained from unaffected donors and from UCMD patients, we analyzed the morphological and functional properties of cellular mechanosensors. We found that the length of the primary cilia of UCMD cells was longer than that of controls. Unlike controls, in UCMD cells, both cilia prevalence and length were not recovered after mechanical stimulation. Accordingly, under the same experimental conditions, the activation of the Hedgehog signaling pathway, which is related to cilia activity, was impaired in UCMD cells. Finally, UCMD tendon cells exposed to mechanical stimuli showed altered focal adhesions, as well as impaired activation of Akt, ERK1/2, p38MAPK, and mechanoresponsive genes downstream of YAP. By exploring the response to mechanical stimulation, for the first time, our findings uncover novel unreported mechanistic aspects of the physiopathology of UCMD-derived tendon fibroblasts and point at a role for collagen VI in the modulation of mechanotransduction in tendons.
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Affiliation(s)
- Vittoria Cenni
- CNR-Institute of Molecular Genetics, via di Barbiano 1/10, 40136 Bologna, Italy
- IRCCS Istituto Ortopedico Rizzoli, 40136 Bologna, Italy
| | - Patrizia Sabatelli
- CNR-Institute of Molecular Genetics, via di Barbiano 1/10, 40136 Bologna, Italy
- IRCCS Istituto Ortopedico Rizzoli, 40136 Bologna, Italy
| | - Alberto Di Martino
- 1st Orthopedics and Traumatology Department, IRCCS Istituto Ortopedico Rizzoli, 40136 Bologna, Italy
- Department of Biomedical and Neuromotor Science, DIBINEM, University of Bologna, 40136 Bologna, Italy
| | - Luciano Merlini
- Department of Biomedical and Neuromotor Science, DIBINEM, University of Bologna, 40136 Bologna, Italy
| | - Manuela Antoniel
- CNR-Institute of Molecular Genetics, via di Barbiano 1/10, 40136 Bologna, Italy
- IRCCS Istituto Ortopedico Rizzoli, 40136 Bologna, Italy
| | - Stefano Squarzoni
- CNR-Institute of Molecular Genetics, via di Barbiano 1/10, 40136 Bologna, Italy
- IRCCS Istituto Ortopedico Rizzoli, 40136 Bologna, Italy
| | - Simona Neri
- Medicine and Rheumatology Unit, IRCCS Istituto Ortopedico Rizzoli, 40136 Bologna, Italy
| | - Spartaco Santi
- CNR-Institute of Molecular Genetics, via di Barbiano 1/10, 40136 Bologna, Italy
- IRCCS Istituto Ortopedico Rizzoli, 40136 Bologna, Italy
| | - Samuele Metti
- Department of Molecular Medicine, University of Padova, 35122 Padova, Italy
| | - Paolo Bonaldo
- Department of Molecular Medicine, University of Padova, 35122 Padova, Italy
| | - Cesare Faldini
- 1st Orthopedics and Traumatology Department, IRCCS Istituto Ortopedico Rizzoli, 40136 Bologna, Italy
- Department of Biomedical and Neuromotor Science, DIBINEM, University of Bologna, 40136 Bologna, Italy
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Micheli L, Parisio C, Lucarini E, Carrino D, Ciampi C, Toti A, Ferrara V, Pacini A, Ghelardini C, Di Cesare Mannelli L. Restorative and pain-relieving effects of fibroin in preclinical models of tendinopathy. Pharmacotherapy 2022; 148:112693. [PMID: 35149388 DOI: 10.1016/j.biopha.2022.112693] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 01/31/2022] [Accepted: 02/02/2022] [Indexed: 12/25/2022]
Abstract
The term tendinopathy indicates a wide spectrum of conditions characterized by alterations in tendon tissue homeostatic response and damage to the extracellular matrix. The current pharmacological approach involves the use of nonsteroidal anti-inflammatory drugs and corticosteroids often with unsatisfactory results, making essential the identification of new treatments. In this study, the pro-regenerative and protective effects of an aqueous fibroin solution (0.5-500 μg/mL) against glucose oxidase (GOx)-induced damage in rat tenocytes were investigated. Then, fibroin anti-hyperalgesic and protective actions were evaluated in two models of tendinopathy induced in rats by collagenase or carrageenan injection, respectively. In vitro, 5-10 μg/mL fibroin per se increased cell viability and reverted the morphological alterations caused by GOx (0.1 U/mL). Fibroin 10 μg/mL evoked proliferative signaling upregulating the expression of decorin, scleraxin, tenomodulin (p < 0.001), FGF-2, and tenascin-C (p < 0.01) genes. Fibroin enhanced the basal FGF-2 and MMP-9 protein concentrations and prevented their GOx-mediated decrease. Furthermore, fibroin positively modulated the production of collagen type I. In vivo, the peri-tendinous injection of fibroin (5 mg) reduced the development of spontaneous pain and hypersensitivity (p < 0.01) induced by the intra-tendinous injection of collagenase; the efficacy was comparable to that of triamcinolone. The pain-relieving action of fibroin (peri-tendinous) was confirmed in the model of tendinopathy induced by carrageenan (intra-tendinous) where this fibrous protein was also able to improve tendon matrix organization, normalizing the orientation of collagen fibers. In conclusion, the use of fibroin in tendinopathies is suggested taking advantage of its excellent mechanical properties, pain-relieving effects, and ability to promote tissue regeneration processes.
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Affiliation(s)
- Laura Micheli
- Department of Neuroscience, Psychology, Drug Research and Child Health-Neurofarba-Pharmacology and Toxicology Section, University of Florence, Viale Pieraccini 6, 50139 Florence, Italy.
| | - Carmen Parisio
- Department of Neuroscience, Psychology, Drug Research and Child Health-Neurofarba-Pharmacology and Toxicology Section, University of Florence, Viale Pieraccini 6, 50139 Florence, Italy.
| | - Elena Lucarini
- Department of Neuroscience, Psychology, Drug Research and Child Health-Neurofarba-Pharmacology and Toxicology Section, University of Florence, Viale Pieraccini 6, 50139 Florence, Italy.
| | - Donatello Carrino
- Dept. of Experimental and Clinical Medicine, University of Florence, 50134 Florence, Italy.
| | - Clara Ciampi
- Department of Neuroscience, Psychology, Drug Research and Child Health-Neurofarba-Pharmacology and Toxicology Section, University of Florence, Viale Pieraccini 6, 50139 Florence, Italy.
| | - Alessandra Toti
- Department of Neuroscience, Psychology, Drug Research and Child Health-Neurofarba-Pharmacology and Toxicology Section, University of Florence, Viale Pieraccini 6, 50139 Florence, Italy.
| | - Valentina Ferrara
- Department of Neuroscience, Psychology, Drug Research and Child Health-Neurofarba-Pharmacology and Toxicology Section, University of Florence, Viale Pieraccini 6, 50139 Florence, Italy.
| | - Alessandra Pacini
- Dept. of Experimental and Clinical Medicine, University of Florence, 50134 Florence, Italy.
| | - Carla Ghelardini
- Department of Neuroscience, Psychology, Drug Research and Child Health-Neurofarba-Pharmacology and Toxicology Section, University of Florence, Viale Pieraccini 6, 50139 Florence, Italy.
| | - Lorenzo Di Cesare Mannelli
- Department of Neuroscience, Psychology, Drug Research and Child Health-Neurofarba-Pharmacology and Toxicology Section, University of Florence, Viale Pieraccini 6, 50139 Florence, Italy.
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Li G, Jiang W, Kang Y, Yu X, Zhang C, Feng Y. High expression of collagen 1A2 promotes the proliferation and metastasis of esophageal cancer cells. ANNALS OF TRANSLATIONAL MEDICINE 2020; 8:1672. [PMID: 33490184 PMCID: PMC7812173 DOI: 10.21037/atm-20-7867] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Background To undertake a bioinformatics analysis to identify abnormally expressed genes [also referred to as differentially expressed genes (DEGs)] and their functions in esophageal carcinoma (ESCA). Methods DEGs (i.e., GSE100942, GSE17351, GSE26886, and GSE77861) were obtained from a gene expression omnibus database. Gene ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) analyses were performed using online tools from the Database for Annotation, Visualization and Integrated Discovery. A protein-protein interaction network was then constructed based on the Search Tool for the Retrieval of Interacting Genes website. Cytoscape software was used to identify the top 20 DEGs located in the central region of the network. For the overall survival analysis, a Kaplan-Meier analysis was conducted of the Gene Expression Profiling Interactive Analysis website, and collagen (COL) 1A2 was selected to detect the molecular mechanism of COL1A2-small interfering ribonucleic acid (siRNA) in the following ESCA cell lines: Eca109 and TE-1. Next, the expression of COL1A2-messanger ribonucleic acid was determined using real-time quantitative polymerase chain reaction. The expression of COL1A2 was also verified by Western blot. Cell proliferation was measured by colony-forming and MTT assays, and migration and invasion by the transwell assay. Results Based on the GEO database and screening out the hub gene, we identified that COL1A2 was abnormally expressed in ESCA. With a series of in vitro experiments, the expression of COL1A2 was defined as higher in Eca109 and TE-1. Conclusions COL1A2 was highly expressed in ESCA tissue samples. Additionally, the proliferation and metastasis of Eca109 and TE-1 cell lines were significantly attenuated by siRNA-COL1A2-mediated small interference. Notably, the expression level of COL1A2 was obviously related to the Akt and epithelial-mesenchymal transition (EMT) pathways.
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Affiliation(s)
- Guangbin Li
- Department of Thoracic Surgery, The First Affiliated Hospital of Soochow University, Suzhou, China
| | - Wei Jiang
- Department of Thoracic Surgery, The First Affiliated Hospital of Soochow University, Suzhou, China
| | - Yunteng Kang
- Department of Thoracic Surgery, The First Affiliated Hospital of Soochow University, Suzhou, China
| | - Xiaojun Yu
- Department of Thoracic Surgery, The First Affiliated Hospital of Soochow University, Suzhou, China
| | - Chengpeng Zhang
- Department of Thoracic Surgery, The First Affiliated Hospital of Soochow University, Suzhou, China
| | - Yu Feng
- Department of Thoracic Surgery, The First Affiliated Hospital of Soochow University, Suzhou, China
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Salib CG, Reina N, Trousdale WH, Limberg AK, Tibbo ME, Jay AG, Robin JX, Turner TW, Jones CR, Paradise CR, Lewallen EA, Bolon B, Carter JM, Berry DJ, Morrey ME, Sanchez-Sotelo J, van Wijnen AJ, Abdel MP. Inhibition of COX-2 Pathway as a Potential Prophylaxis Against Arthrofibrogenesis in a Rabbit Model of Joint Contracture. J Orthop Res 2019; 37:2609-2620. [PMID: 31410880 PMCID: PMC6848758 DOI: 10.1002/jor.24441] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/17/2018] [Accepted: 07/25/2019] [Indexed: 02/04/2023]
Abstract
Arthrofibrosis is a common complication following total knee arthroplasty caused by pathologic fibroblast activation and excessive collagen deposition around a synovial joint leading to debilitating loss of motion. Treatment options are limited because the pathologic mechanisms remain to be characterized. Dysregulation of the inflammatory cascade may lead to communication between myofibroblasts and immune cells triggering tissue metaplasia, and excessive collagen deposition described clinically as arthrofibrosis. We explored the novel use of celecoxib (selective cyclooxygenase-2 [COX-2] inhibitor) to disrupt the downstream effects of the post-traumatic inflammatory cascade and inhibit scar tissue formation in a validated rabbit model of arthrofibrosis combined with new parameters for quantifying the stiffness of the posterior capsule. Biomechanical and molecular analyses, of contracted rabbit knee posterior capsule tissue after COX-2 inhibition revealed increased maximal passive extension and down-regulation of collagen messenger RNA compared with controls. Histopathologic examination suggested a trend of decreased quantities of dense fibrous connective tissue with COX-2 inhibition. These data may suggest that inhibiting the inflammatory cascade could potentially reduce pathologic myofibroblast activation, thereby reducing scar tissue formation and increasing the range of motion in arthrofibrotic joints. Implementing a multi-modal pharmacologic approach may simultaneously target numerous cellular components contributing to the complex process of arthrofibrogenesis. © 2019 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 37:2609-2620, 2019.
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Affiliation(s)
- Christopher G. Salib
- Department of Orthopedic Surgery, Mayo Clinic, 200 First Street SW, Rochester, MN 55905
| | - Nicolas Reina
- Department of Orthopedic Surgery, Mayo Clinic, 200 First Street SW, Rochester, MN 55905
| | - William H. Trousdale
- Department of Orthopedic Surgery, Mayo Clinic, 200 First Street SW, Rochester, MN 55905
| | - Afton K. Limberg
- Department of Orthopedic Surgery, Mayo Clinic, 200 First Street SW, Rochester, MN 55905
| | - Megan E. Tibbo
- Department of Orthopedic Surgery, Mayo Clinic, 200 First Street SW, Rochester, MN 55905
| | - Anthony G. Jay
- Department of Orthopedic Surgery, Mayo Clinic, 200 First Street SW, Rochester, MN 55905
| | - Joseph X. Robin
- Department of Orthopedic Surgery, Mayo Clinic, 200 First Street SW, Rochester, MN 55905
| | - Travis W. Turner
- Department of Orthopedic Surgery, Mayo Clinic, 200 First Street SW, Rochester, MN 55905
| | - Carter R. Jones
- Department of Orthopedic Surgery, Mayo Clinic, 200 First Street SW, Rochester, MN 55905
| | | | - Eric A. Lewallen
- Department of Orthopedic Surgery, Mayo Clinic, 200 First Street SW, Rochester, MN 55905
| | - Brad Bolon
- GEMpath, Inc., 1610 Pace Street, Unit 900-343, Longmont, CO 80504
| | - Jodi M. Carter
- Department of Orthopedic Surgery, Mayo Clinic, 200 First Street SW, Rochester, MN 55905
| | - Daniel J. Berry
- Department of Orthopedic Surgery, Mayo Clinic, 200 First Street SW, Rochester, MN 55905
| | - Mark E. Morrey
- Department of Orthopedic Surgery, Mayo Clinic, 200 First Street SW, Rochester, MN 55905
| | | | - Andre J. van Wijnen
- Department of Orthopedic Surgery, Mayo Clinic, 200 First Street SW, Rochester, MN 55905,Department of Biochemistry & Molecular Biology, Mayo Clinic, 200 First Street SW, Rochester, MN 55905
| | - Matthew P. Abdel
- Department of Orthopedic Surgery, Mayo Clinic, 200 First Street SW, Rochester, MN 55905
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Fang S, Dai Y, Mei Y, Yang M, Hu L, Yang H, Guan X, Li J. Clinical significance and biological role of cancer-derived Type I collagen in lung and esophageal cancers. Thorac Cancer 2019; 10:277-288. [PMID: 30604926 PMCID: PMC6360244 DOI: 10.1111/1759-7714.12947] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Revised: 11/02/2018] [Accepted: 11/27/2018] [Indexed: 01/14/2023] Open
Abstract
BACKGROUND Extracellular matrix (ECM) is remodeled during carcinogenesis. An abundant constituent of ECM is collagen. Type I collagen is secreted by fibroblasts, is important for tumor growth and epithelial-mesenchymal transition, and may also be secreted by cancer cells. However, the role and function of cancer-derived Type I collagen in the tumor microenvironment remains unclear. METHODS We used immunohistochemistry and Western blot to detect Type I collagen expression in non-small cell lung cancer (NSCLC) and esophageal squamous cell carcinoma (ESCC) cell lines, respectively. We assessed the migration and adhesion capability of these cells in vivo by inhibiting Type I collagen in tumors. Relevant data were extracted from a large cohort study of The Cancer Genome Atlas to analyze messenger RNA levels. Protein expression of Type I collagen was further determined in tumor tissues of patients using tissue microarray. RESULTS Cancer cell lines secreted Type I collagen. The molecular weight of cancer-derived Type I collagen was different from that secreted by cancer-associated fibroblasts and normal fibroblasts. Expression levels of COL1A1 and COL1A2 (subtypes of Type I collagen) messenger RNA in NSCLC and ESCC tumors were higher than in normal tissues, but were not associated with tumor node metastasis stages. Low expression of Type I collagen was significantly associated with poor overall survival and cancer cell differentiation. CONCLUSION NSCLC and ESCC cells could produce Type I collagen endogenously, revealing the potential functions of Type I collagen in cancer development. Cancer-derived Type I collagen was associated with overall survival and cancer cell differentiation.
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Affiliation(s)
- Shuo Fang
- Department of Oncology, The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen, China.,Department of Clinical Oncology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong
| | - Yongdong Dai
- Assisted Reproduction Unit, Department of Obstetrics and Gynecology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Yan Mei
- State Key Laboratory of Oncology in Southern China, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Mingming Yang
- Vascular Biology Research Institute, School of Basic Course, Guangdong Pharmaceutical University, Guangzhou, China
| | - Liang Hu
- Reproductive and Genetic Hospital of CITIC-XIANGYA, Changsha, China
| | - Hong Yang
- Department of Thoracic Surgery, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Xininyuan Guan
- Department of Clinical Oncology, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong.,State Key Laboratory of Oncology in Southern China, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Jiangchao Li
- State Key Laboratory of Oncology in Southern China, Sun Yat-sen University Cancer Center, Guangzhou, China.,Vascular Biology Research Institute, School of Basic Course, Guangdong Pharmaceutical University, Guangzhou, China
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Effect of a Collagen-Based Compound on Morpho-Functional Properties of Cultured Human Tenocytes. Cells 2018; 7:cells7120246. [PMID: 30563214 PMCID: PMC6316559 DOI: 10.3390/cells7120246] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Revised: 12/02/2018] [Accepted: 12/04/2018] [Indexed: 12/24/2022] Open
Abstract
Background: Greater Trochanter Pain Syndrome (GTPS) is the main reason for recalcitrant lateral hip pain. Gluteus medius and minimus tendinopathy plays a key role in this setting. An injectable medical compound containing collagen type I (MD-Tissue, Guna) has been produced with the aim to counteract the physiological and pathological degeneration of tendons. In this study we aimed at characterizing the effect of this medical compound on cultured human gluteal tenocytes, focusing on the collagen turnover pathways, in order to understand how this medical compound could influence tendon biology and healing. Methods: Tenocytes were obtained from gluteal tendon fragments collected in eight patients without any gluteal tendon pathology undergoing total hip replacement through an anterior approach. Cell proliferation and migration were investigated by growth curves and wound healing assay, respectively. The expression of genes and proteins involved in collagen turnover were analysed by real-time PCR, Slot blot and SDS-zymography. Results: Our data show that tenocytes cultured on MD-Tissue, compared to controls, have increased proliferation rate and migration potential. MD-Tissue induced collagen type I (COL-I) secretion and mRNA levels of tissue inhibitor of matrix metalloproteinases (MMP)-1 (TIMP-1). Meanwhile, lysyl hydroxylase 2b and matrix metalloproteinases (MMP)-1 and -2, involved, respectively, in collagen maturation and degradation, were not affected. Conclusions: Considered as a whole, our results suggest that MD-Tissue could induce in tenocytes an anabolic phenotype by stimulating tenocyte proliferation and migration and COL-I synthesis, maturation, and secretion, thus favouring tendon repair. In particular, based on its effect on gluteal tenocytes, MD-Tissue could be effective in the discouraging treatment of GTPS. From now a rigorous clinical investigation is desirable to understand the real clinical potentials of this compound.
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Joo Kim J, Musson DS, Matthews BG, Cornish J, Anderson IA, Shim VB. Applying Physiologically Relevant Strains to Tenocytes in an In Vitro Cell Device Induces In Vivo Like Behaviors. J Biomech Eng 2017; 138:2532509. [PMID: 27379605 DOI: 10.1115/1.4034031] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Indexed: 01/26/2023]
Abstract
We have developed a novel cell stretching device (called Cell Gym) capable of applying physiologically relevant low magnitude strains to tenocytes on a collagen type I coated membrane. We validated our device thoroughly on two levels: (1) substrate strains, (2) cell level strains. Our cell level strain results showed that the applied stretches were transferred to cells accurately (∼90%). Our gene expression data showed that mechanically stimulated tenocytes (4%) expressed a lower level of COL I gene. COX2 gene was increased but did not reach statistical significance. Our device was then tested to see if it could reproduce results from an in vivo study that measured time-dependent changes in collagen synthesis. Our results showed that collagen synthesis peaked at 24 hrs after exercise and then decreased, which matched the results from the in vivo study. Our study demonstrated that it is important to incorporate physiologically relevant low strain magnitudes in in vitro cell mechanical studies and the need to validate the device thoroughly to operate the device at small strains. This device will be used in designing novel tendon tissue engineering scaffolds in the future.
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Affiliation(s)
- Jung Joo Kim
- Auckland Bioengineering Institute, University of Auckland, Auckland 1010, New Zealand
| | - David S Musson
- Department of Medicine, University of Auckland, Auckland 1010, New Zealand
| | - Brya G Matthews
- Department of Medicine, University of Auckland, Auckland 1010, New Zealand;Department of Reconstructive Sciences, University of Connecticut Health Center, Farmington, CT 06030
| | - Jillian Cornish
- Department of Medicine, University of Auckland, Auckland 1010, New Zealand
| | - Iain A Anderson
- Auckland Bioengineering Institute, University of Auckland, Auckland 1010, New Zealand;Department of Engineering Science, University of Auckland, Auckland 1010, New Zealand
| | - Vickie B Shim
- Auckland Bioengineering Institute, University of Auckland, 70 Symonds Street, Auckland Central, Auckland 1010, New Zealand e-mail:
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Romero A, Barrachina L, Ranera B, Remacha A, Moreno B, de Blas I, Sanz A, Vázquez F, Vitoria A, Junquera C, Zaragoza P, Rodellar C. Comparison of autologous bone marrow and adipose tissue derived mesenchymal stem cells, and platelet rich plasma, for treating surgically induced lesions of the equine superficial digital flexor tendon. Vet J 2017; 224:76-84. [DOI: 10.1016/j.tvjl.2017.04.005] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Revised: 04/03/2017] [Accepted: 04/12/2017] [Indexed: 12/24/2022]
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Simultaneous bilateral quadriceps tendon rupture with remote, short-term, low-dose statin use. CURRENT ORTHOPAEDIC PRACTICE 2017. [DOI: 10.1097/bco.0000000000000447] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Oliva F, Piccirilli E, Berardi AC, Frizziero A, Tarantino U, Maffulli N. Hormones and tendinopathies: the current evidence. Br Med Bull 2016; 117:39-58. [PMID: 26790696 DOI: 10.1093/bmb/ldv054] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 10/30/2015] [Indexed: 12/17/2022]
Abstract
BACKGROUND Tendinopathies negatively affect the quality of life of millions of people, but we still do not know the factors involved in the development of tendon conditions. SOURCES OF DATA Published articles in English in PubMed and Google Scholar up to June 2015 about hormonal influence on tendinopathies onset. One hundred and two papers were included following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. AREAS OF AGREEMENT In vitro and in vivo, tenocytes showed changes in their morphology and in their functional properties according to hormonal imbalances. AREAS OF CONTROVERSY Genetic pattern, sex, age and comorbidities can influence the hormonal effect on tendons. GROWING POINTS The increasing prevalence of metabolic disorders prompts to investigate the possible connection between metabolic problems and musculoskeletal diseases. AREAS TIMELY FOR DEVELOPING RESEARCH The influence of hormones on tendon structure and metabolism needs to be further investigated. If found to be significant, multidisciplinary preventive and therapeutic strategies should then be developed.
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Affiliation(s)
- Francesco Oliva
- Department of Orthopaedics and Traumatology, University of Rome 'Tor Vergata', Roma, Italy
| | - Eleonora Piccirilli
- School of Specialization of Orthopaedics and Traumatology, University of Rome 'Tor Vergata', Roma, Italy
| | - Anna C Berardi
- UOC Immunohematology and Transfusion Medicine Laboratories, Laboratory of Stem Cells, Spirito Santo Hospital, Pescara, Italy
| | - Antonio Frizziero
- Department of Physical and Rehabilitation Medicine, University of Padua, Padua, Italy
| | - Umberto Tarantino
- Department of Orthopaedics and Traumatology, University of Rome 'Tor Vergata', Roma, Italy
| | - Nicola Maffulli
- Centre for Sports and Exercise Medicine, Queen Mary University of London Barts, London, UK The London School of Medicine and Dentistry, Mile End Hospital London, London, UK Department of Physical and Rehabilitation Medicine, University of Salerno, Fisciano, Italy
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11
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Cross JA, Cole BJ, Spatny KP, Sundman E, Romeo AA, Nicholson GP, Wagner B, Fortier LA. Leukocyte-Reduced Platelet-Rich Plasma Normalizes Matrix Metabolism in Torn Human Rotator Cuff Tendons. Am J Sports Med 2015; 43:2898-906. [PMID: 26460099 DOI: 10.1177/0363546515608157] [Citation(s) in RCA: 75] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
BACKGROUND The optimal platelet-rich plasma (PRP) for treatment of supraspinatus tendinopathy has not been determined. PURPOSE To evaluate the effect of low- versus high-leukocyte concentrated PRP products on catabolic and anabolic mediators of matrix metabolism in diseased rotator cuff tendons. STUDY DESIGN Controlled laboratory study. METHODS Diseased supraspinatus tendons were treated with PRP made by use of 2 commercial systems: Arthrex Autologous Conditioned Plasma Double Syringe System (L(lo) PRP) and Biomet GPS III Mini Platelet Concentrate System (L(hi) PRP). Tendon explants were placed in 6-well plates and cultured in L(lo) PRP, L(hi) PRP, or control media (Dulbecco's Modified Eagle Medium + 10% fetal bovine serum) for 96 hours. Tendons were processed for hematoxylin-eosin histologic results and were scored with the modified Bonar scale. Group 1 tendons were defined as moderate tendinopathy (Bonar score <3); group 2 tendons were assessed as severely affected (Bonar score = 3). Transforming growth factor β-1 (TGFβ-1), interleukin-1β (IL-1β), interleukin-1 receptor antagonist (IL-1Ra), interleukin-6 (IL-6), interleukin-8 (IL-8), and matrix metalloproteinase-9 (MMP-9) concentrations in PRP media were measured by use of enzyme-linked immunosorbent assay after 96 hours of culture with diseased tendon. Tendon messenger RNA expression of collagen type I (COL1A1), collagen type III (COL3A1), cartilage oligomeric matrix protein (COMP), MMP-9, MMP-13, and IL-1β was measured with real-time quantitative polymerase chain reaction. RESULTS Leukocytes and platelets were significantly more concentrated in L(hi) PRP compared with L(lo) PRP. Increased IL-1β was present in L(hi) PRP after culture with group 1 tendons. IL-6 was increased in L(hi) PRP after culture with group 2 tendons. Both TGFβ-1 and MMP-9 were increased in L(hi) PRP after culture with either tendon group. In L(lo) PRP cultures, IL-1Ra:IL-1β in PRP used as media and COL1A1:COL3A1 gene expression were increased for group 1 tendon cultures. Gene expression of MMP-9 and IL-1β was increased in group 2 tendons cultured in L(lo) PRP. There was no significant difference in the expression of MMP-13 or COMP in either group of tendons cultured in L(lo) PRP or L(hi) PRP. CONCLUSION L(lo) PRP promotes normal collagen matrix synthesis and decreases cytokines associated with matrix degradation and inflammation to a greater extent than does L(hi) PRP in moderately degenerative tendons. In severely degenerative tendons, neither PRP preparation enhanced matrix synthesis. CLINICAL RELEVANCE L(lo) PRP may promote healing in moderately degenerative rotator cuff tendons.
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Affiliation(s)
- Jessica A Cross
- Department of Clinical Sciences, Cornell University, Ithaca, New York, USA
| | - Brian J Cole
- Department of Orthopedics, Rush University Medical Center, Chicago, Illinois, USA
| | - Kaylan P Spatny
- Department of Clinical Sciences, Cornell University, Ithaca, New York, USA
| | - Emily Sundman
- Department of Clinical Sciences, Cornell University, Ithaca, New York, USA
| | - Anthony A Romeo
- Department of Orthopedics, Rush University Medical Center, Chicago, Illinois, USA
| | - Greg P Nicholson
- Department of Orthopedics, Rush University Medical Center, Chicago, Illinois, USA
| | - Bettina Wagner
- Department of Population Medicine and Diagnostic Sciences, Cornell University, Ithaca, New York, USA
| | - Lisa A Fortier
- Department of Clinical Sciences, Cornell University, Ithaca, New York, USA
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12
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Paolillo FR, Arena R, Dutra DB, de Cassia Marqueti Durigan R, de Araujo HS, de Souza HCD, Parizotto NA, Cipriano G, Chiappa G, Borghi-Silva A. Low-level laser therapy associated with high intensity resistance training on cardiac autonomic control of heart rate and skeletal muscle remodeling in wistar rats. Lasers Surg Med 2014; 46:796-803. [PMID: 25363390 DOI: 10.1002/lsm.22298] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/08/2014] [Indexed: 12/22/2022]
Abstract
BACKGROUND AND OBJECTIVE Phototherapy plus dynamic exercise can enhance physical performance and improve health. The aim of our study was to evaluate the effect of low-level laser therapy (LLLT) associated with high intensity resistance training (HIT) on cardiac autonomic and muscle metabolic responses in rats. STUDY DESIGN/MATERIALS AND METHODS Forty Wistar rats were randomized into 4 groups: sedentary control (CG), HIT, LLLT and HIT + LLLT. HIT was performed 3 times/week for 8 weeks with loads attached to the tail of the animal. The load was gradually increased by 10% of body mass until reaching a maximal overload. For LLLT, irradiation parameters applied to the tibialis anterior (TA) muscle were as follows: infrared laser (780 nm), power of 15 mW for 10 seconds, leading to an irradiance of 37.5 mW/cm(2), energy of 0.15 J per point and fluency of 3.8 J/cm(2). Blood lactate (BL), matrix metalloproteinase gelatinase A (MMP(-2)) gene expression and heart rate variability (HRV) indices were performed. RESULTS BL significantly increased after 8-weeks for HIT, LLLT and HIT + LLLT groups. However, peak lactate when normalized by maximal load was significantly reduced for both HIT and HIT + LLLT groups (P<0.05). MMP-2 in the active form was significantly increased after HIT, LLLT and HIT + LLLT compared tom the CG (P<0.05). There was a significant reduction in low frequency [LF (ms(2))] and increase in high frequency [HF (un)] and HF (ms(2))] for the HIT, LLLT and HIT + LLLT groups compared with the CG (P < 0.05). However, the LF/HF ratio was further reduced in the LLLT and HIT + LLLT groups compared to the CG and HIT group (P < 0.05). CONCLUSION These results provide evidence for the positive benefits of LLLT and HIT with respect to enhanced muscle metabolic and cardiac autonomic function in Wistar rats.
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Affiliation(s)
- Fernanda Rossi Paolillo
- Optics Group from Physics Institute of São Carlos (IFSC), University of São Paulo (USP), Brazil
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13
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Platelet concentration in platelet-rich plasma affects tenocyte behavior in vitro. BIOMED RESEARCH INTERNATIONAL 2014; 2014:630870. [PMID: 25147809 PMCID: PMC4132404 DOI: 10.1155/2014/630870] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/12/2014] [Accepted: 07/03/2014] [Indexed: 01/08/2023]
Abstract
Since tendon injuries and tendinopathy are a growing problem, sometimes requiring surgery, new strategies that improve conservative therapies are needed. Platelet-rich plasma (PRP) seems to be a good candidate by virtue of its high content of growth factors, most of which are involved in tendon healing. This study aimed to evaluate if different concentrations of platelets in PRP have different effects on the biological features of normal human tenocytes that are usually required during tendon healing. The different platelet concentrations tested (up to 5 × 10(6) plt/µL) stimulated differently tenocytes behavior; intermediate concentrations (0.5 × 10(6), 1 × 10(6) plt/µL) strongly induced all tested processes (proliferation, migration, collagen, and MMPs production) if compared to untreated cells; on the contrary, the highest concentration had inhibitory effects on proliferation and strongly reduced migration abilities and overall collagen production but, at the same time, induced increasing MMP production, which could be counterproductive because excessive proteolysis could impair tendon mechanical stability. Thus, these in vitro data strongly suggest the need for a compromise between extremely high and low platelet concentrations to obtain an optimal global effect when inducing in vivo tendon healing.
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14
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Jung SY, Ko YJ, Jang HS, Kang SW, Park JH. The effect of carrier for BMP-2 delivery on histological aspects of tissue-engineered bone. Tissue Eng Regen Med 2013. [DOI: 10.1007/s13770-013-1102-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
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15
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The activities of MMP-9 and total gelatinase respond differently to substrate coating and cyclic mechanical stretching in fibroblasts and myoblasts. Cell Biol Int 2010; 34:587-91. [DOI: 10.1042/cbi20090096] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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16
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Sendzik J, Shakibaei M, Schäfer-Korting M, Lode H, Stahlmann R. Synergistic effects of dexamethasone and quinolones on human-derived tendon cells. Int J Antimicrob Agents 2010; 35:366-74. [DOI: 10.1016/j.ijantimicag.2009.10.009] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2009] [Revised: 09/21/2009] [Accepted: 10/06/2009] [Indexed: 12/11/2022]
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17
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Hosaka YZ, Takahashi H, Uratsuji T, Tangkawattana P, Ueda H, Takehana K. Comparative study of the characteristics and properties of tendinocytes derived from three tendons in the equine forelimb. Tissue Cell 2010; 42:9-17. [DOI: 10.1016/j.tice.2009.06.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2009] [Revised: 05/26/2009] [Accepted: 06/06/2009] [Indexed: 11/27/2022]
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18
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Effects of platelet rich plasma and acellular bone marrow on gene expression patterns and DNA content of equine suspensory ligament explant cultures. Equine Vet J 2010; 40:260-5. [DOI: 10.2746/042516408x278030] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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19
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Townley WA, Cambrey AD, Khaw PT, Grobbelaar AO. Matrix metalloproteinase inhibition reduces contraction by dupuytren fibroblasts. J Hand Surg Am 2008; 33:1608-16. [PMID: 18984345 DOI: 10.1016/j.jhsa.2008.06.013] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/05/2008] [Revised: 06/09/2008] [Accepted: 06/12/2008] [Indexed: 02/02/2023]
Abstract
PURPOSE Dupuytren's disease is a common fibroproliferative condition of the hand characterized by fibrotic lesions (nodules and cords), leading to disability through progressive digital contracture. Although the etiology of the disease is poorly understood, recent evidence suggests that abnormal matrix metalloproteinase (MMP) activity may play a role in cell-mediated collagen contraction and tissue scarring. The aim of this study was to investigate the efficacy of ilomastat, a broad-spectrum MMP inhibitor, in an in vitro model of Dupuytren fibroblast-mediated contraction. METHODS Nodule-derived and cord-derived fibroblasts were isolated from Dupuytren patients; carpal ligament-derived fibroblasts acted as control. Stress-release fibroblast-populated collagen lattices (FPCLs) were used as a model of contraction. FPCLs were allowed to develop mechanical stress (48 hours) during treatment with ilomastat (0-100 micromol/L), released, and allowed to contract over a 48-hour period. Contraction was estimated by measuring lattice area compared with untreated cells or treatment with a control peptide. MMP-1, MMP-2, and MT1-MMP levels were assessed by zymography, Western blotting, and enzyme-linked immunosorbent assay. RESULTS Nodule-derived fibroblasts contracted lattices (69% +/- 2) to a greater extent than did cord-derived (55% +/- 3) or carpal ligament-derived (55% +/- 1) fibroblasts. Exposure to ilomastat led to significant inhibition of lattice contraction by all fibroblasts, although a reduction in lattice contraction by nodule-derived fibroblasts was most prominent (84% +/- 8). In addition, treatment with ilomastat led to a concomitant suppression of MMP-1 and MMP-2 activity, whereas MT1-MMP activity was found to be upregulated. CONCLUSIONS Our results demonstrate that inhibition of MMP activity results in a reduction in extracellular matrix contraction by Dupuytren fibroblasts and suggest that MMP activity may be a critical target in preventing recurrent contracture caused by this disease.
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Affiliation(s)
- William A Townley
- RAFT Institute of Plastic and Reconstructive Surgery, Mount Vernon Hospital, The Leopold Muller Building, Northwood, UK.
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20
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Matrix metallopeptidase 2 activity in tendon regions: effects of mechanical loading exercise associated to anabolic-androgenic steroids. Eur J Appl Physiol 2008; 104:1087-93. [DOI: 10.1007/s00421-008-0867-7] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/01/2008] [Indexed: 10/21/2022]
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21
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Pullatt RC, Gadarla MR, Karas RH, Alsheikh-Ali AA, Thompson PD. Tendon rupture associated with simvastatin/ezetimibe therapy. Am J Cardiol 2007; 100:152-3. [PMID: 17599460 DOI: 10.1016/j.amjcard.2007.02.068] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2007] [Revised: 02/12/2007] [Accepted: 02/12/2007] [Indexed: 11/24/2022]
Abstract
A case of spontaneous biceps tendon rupture in a physician during therapy with the combination of simvastatin and ezetimibe (Vytorin) is reported. Rechallenge produced tendinopathy in the contralateral biceps tendon that abated with drug discontinuation. Tendon rupture generally occurs in injured tendons. Physiological repair of an injured tendon requires degradation and remodeling of the extracellular matrix through matrix metalloproteinases (MMPs). Statins are known to inhibit MMPs. It was hypothesized that statins may increase the risk of tendon rupture by altering MMP activity. In conclusion, statins may increase the risk of tendon rupture by altering MMP activity.
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Affiliation(s)
- Raja C Pullatt
- Department of Internal Medicine, University of Connecticut, Farmington, Connecticut, USA
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22
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Schnabel LV, Mohammed HO, Miller BJ, McDermott WG, Jacobson MS, Santangelo KS, Fortier LA. Platelet rich plasma (PRP) enhances anabolic gene expression patterns in flexor digitorum superficialis tendons. J Orthop Res 2007; 25:230-40. [PMID: 17106885 DOI: 10.1002/jor.20278] [Citation(s) in RCA: 242] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Platelet rich plasma (PRP) has recently been investigated for use in tissue regeneration studies that seek to utilize the numerous growth factors released from platelet alpha-granules. This study examined gene expression patterns, DNA, and collagen content of equine flexor digitorum superficialis tendon (SDFT) explants cultured in media consisting of PRP and other blood products. Blood and bone marrow aspirate (BMA) were collected from horses and processed to obtain plasma, PRP, and platelet poor plasma (PPP). IGF-I, TGF-beta1, and PDGF-BB were quantified in all blood products using ELISA. Tendons were cultured in explant fashion with blood, plasma, PRP, PPP, or BMA at concentrations of 100%, 50%, or 10% in serum-free DMEM with amino acids. Quantitative RT-PCR for expression of collagen type I (COL1A1), collagen type III (COL3A1), cartilage oligomeric matrix protein (COMP), decorin, matrix metalloproteinase-3 (MMP-3), and matrix metalloproteinase-13 (MMP-13) was performed as were DNA and total soluble collagen assays. TGF-beta1 and PDGF-BB concentrations were higher in PRP compared to all other blood products tested. Tendons cultured in 100% PRP showed enhanced gene expression of the matrix molecules COL1A1, COL3A1, and COMP with no concomitant increase in the catabolic molecules MMP-3 and MMP-13. These findings support in vivo investigation of PRP as an autogenous, patient-side treatment for tendonitis.
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Affiliation(s)
- Lauren V Schnabel
- Department of Clinical Sciences, VMC C3-181, Cornell University, Ithaca, New York 14853, USA
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23
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Ikema Y, Tohyama H, Yamamoto E, Kanaya F, Yasuda K. Ex vivo infiltration of fibroblasts into the tendon deteriorates the mechanical properties of tendon fascicles but not those of tendon bundles. Clin Biomech (Bristol, Avon) 2007; 22:120-6. [PMID: 17084002 DOI: 10.1016/j.clinbiomech.2006.08.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/14/2005] [Revised: 08/30/2006] [Accepted: 08/31/2006] [Indexed: 02/07/2023]
Abstract
BACKGROUND After ligament reconstruction, mechanical deterioration of the grafted tendon is observed with revascularization and cellular infiltration. However, the effect of cellular infiltration on the mechanical properties of the tendon matrix has not been fully understood. METHODS Cultured fibroblasts derived from the rabbit patellar tendon were seeded around an acellular rabbit patellar tendon that had undergone freeze-thaw treatment. At time-0, 3, and 6 weeks after seeding the cells, we evaluated cellular distribution in the tendon using a confocal laser microscope and the mechanical evaluations of the tendon fascicles and the tendon bundles. FINDINGS The confocal laser microscopic analysis showed fibroblast infiltration ex vivo into the acellular tendon matrix. We could not find significant effects of the cellular infiltration on the tangent modulus of the tendon bundle, although the ex vivo cellular infiltration significantly reduced the modulus of the tendon fascicle. In addition, the tangent modulus of the incubated tendon without fibroblasts significantly decreased with time, particularly in the tendon bundle levels. INTERPRETATION The findings of this study suggested that the effects of ex vivo cellular infiltration on the mechanical properties of the tendon bundles are relatively small, compared with its striking effect on the tendon fascicles.
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Affiliation(s)
- Yasunari Ikema
- Department of Sports Medicine and Joint Reconstruction Surgery, Hokkaido University School of Medicine, Kita-15 Nishi-7, Sapporo 060-8638, Japan
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24
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Graham HK, Trafford AW. Spatial disruption and enhanced degradation of collagen with the transition from compensated ventricular hypertrophy to symptomatic congestive heart failure. Am J Physiol Heart Circ Physiol 2006; 292:H1364-72. [PMID: 17071734 DOI: 10.1152/ajpheart.00355.2006] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The cardiac extracellular matrix (ECM) maintains the structural and mechanical integrity of the myocardium. We determined the alterations in the composition of the ECM coincident with the transition from compensated left ventricular (LV) hypertrophy (LVH) to symptomatic congestive heart failure (CHF) and the mechanisms underlying such changes. Heart failure was induced in ferrets by aortic banding. Myocardial collagen content was assessed by HPLC and histological analysis. Matrix metalloproteinase (MMP) activity and tissue inhibitor of metalloproteinase (TIMP) expression were evaluated using gelatin zymography and Western blotting, respectively. LV free wall thickness increased by 29% in asymptomatic LVH and was associated with a 20% increase in interstitial fibrosis (P < 0.05). CHF was coincident with increased plasma angiotensin II levels (149 +/- 48, 40 +/- 19, and 5.6 +/- 1 pg/ml for CHF, LVH, and sham, respectively; P < 0.01, CHF vs. sham and LVH), ventricular dilatation (LV internal diameter = 15 +/- 0.4 vs. 9 +/- 0.1 mm, P < 0.05), increased active MMP-9 (3.0- and 2.2-fold increase over sham and LVH, respectively, n = 5-10 animals per group, P < 0.01), and reduced myocardial total collagen content (3.5 +/- 0.4, 2.6 +/- 0.3, and 2.2 +/- 0.3% in sham, LVH, and CHF, respectively, P < 0.05). In CHF the distribution of collagen was markedly altered, becoming punctate in nature. No difference in MMP-2 activity, TIMP-1, TIMP-2, TIMP-3, or TIMP-4 expression, or collagen cross-linking was found at any time. The present work demonstrates structural reorganization and loss of collagen from cardiac ECM during the transition to decompensated CHF. The enhanced MMP-9 activity coincident with the transition to CHF provides potential therapeutic opportunities for managing the progression from asymptomatic LVH to symptomatic CHF.
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Affiliation(s)
- H K Graham
- Unit of Cardiac Physiology, Division of Cardiovascular & Endocrine Sciences, Univ of Manchester, 3.08 Core Technology Facility, Manchester, UK
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25
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Scutt N, Rolf CG, Scutt A. Glucocorticoids inhibit tenocyte proliferation and Tendon progenitor cell recruitment. J Orthop Res 2006; 24:173-82. [PMID: 16435354 DOI: 10.1002/jor.20030] [Citation(s) in RCA: 100] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Corticosteroid injection is commonly used to treat tendon injuries but is often associated with tendon rupture and impaired tendon healing. The effects of dexamethasone on tenocytes have been studied in vitro but only using high concentrations of dexamethasone in monolayer cultures of tenocytes over short periods of time. We have therefore investigated the effects of physiological and pharmacological concentrations of dexamethasone on monolayer cultures of tenocytes over extended time periods. We have also used fibroblastic-colony forming unit cultures to examine the effects of dexamethasone on a progenitor cell population located in tendons. Culturing tenocytes in the presence of dexamethasone for a period of 24 days resulted in a concentration-related decrease in cell number and collagen synthesis as compared to control cultures. This effect was time dependent with cell number in both dexamethasone-treated and control cultures leveling off after 14 days with the control cultures reaching higher cell densities. In contrast in control cultures, collagen accumulation continued to increase until week 4, whereas in the presence of dexamethasone, this tended to level off after 14 days. To study the role of progenitor cell recruitment, the effects of dexamethasone were investigated using the fibroblastic-colony forming unit assay. Treatment with dexamethasone at concentrations of 0.1 nM to 10 microM leads to a progressive reduction in mean colony size as compared to control cultures. Colony number remained constant at concentrations below 10 nM but fell progressively at concentrations above this. In conclusion, dexamethasone reduces both cell number and collagen synthesis in tenocyte cultures in a concentration-dependent manner by both direct effects on tenocyte proliferation and collagen accumulation, and also by modulating the recruitment of tendon progenitor cells.
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Affiliation(s)
- Nanette Scutt
- Sheffield Centre for Sports Medicine, Division of Clinical Sciences South, University of Sheffield Medical School, Sheffield, United Kingdom
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26
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Koskinen SOA, Heinemeier KM, Olesen JL, Langberg H, Kjaer M. Physical exercise can influence local levels of matrix metalloproteinases and their inhibitors in tendon-related connective tissue. J Appl Physiol (1985) 2004; 96:861-4. [PMID: 14506093 DOI: 10.1152/japplphysiol.00489.2003] [Citation(s) in RCA: 98] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Microdialysis studies indicate that mechanical loading of human tendon tissue during exercise or training can affect local synthesis and degradation of type I collagen. Degradation of collagen and other extracellular matrix proteins is controlled by an interplay between matrix metalloproteinases (MMPs) and their tissue inhibitors (TIMPs). However, it is unknown whether local levels of MMPs and TIMPs are affected by tendon loading in humans in vivo. In the present experiment, six healthy young men performed 1 h of uphill (3%) treadmill running. Dialysate was collected from microdialysis probes (placed in the peritendinous tissue immediately anterior to the Achilles tendon) before, immediately after, 1 day after, and 3 days after an exercise bout. MMP-2 and MMP-9 were measured in dialysate by gelatin zymography, and amounts were quantified by densitometry in relation to total protein in the dialysate. TIMP-1 and TIMP-2 were analyzed by reverse gelatin zymography and semiquantitated visually. Pro-MMP-9 increased markedly after exercise and remained high for 3 days after exercise. Pro-MMP-2 dropped from the basal level immediately after exercise and remained low 1 day after exercise but was slightly elevated 3 days after exercise. The MMP-2 inhibitory activity of TIMP-1 was clearly elevated 1 and 3 days after exercise, and the MMP-2 inhibitory activity of TIMP-2 rose 1 day after loading. The present findings demonstrate enhanced interstitial amounts of MMPs and TIMPs after exercise in the human peritendinous tissue in vivo, and the magnitude and time pattern of these changes may well indicate that MMPs and TIMPs are playing a role in extracellular matrix adaptation to exercise in tendon tissue.
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Affiliation(s)
- S O A Koskinen
- Sports Medicine Research Unit, Bispebjerg Hospital, Copenhagen, Denmark.
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27
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Xu J, Cui G, Esmailian F, Plunkett M, Marelli D, Ardehali A, Odim J, Laks H, Sen L. Atrial Extracellular Matrix Remodeling and the Maintenance of Atrial Fibrillation. Circulation 2004; 109:363-8. [PMID: 14732752 DOI: 10.1161/01.cir.0000109495.02213.52] [Citation(s) in RCA: 261] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background—
Remodeling occurs in both ventricle and atrium in dilated cardiomyopathy and heart failure. However, the alteration of atrial extracellular matrix components during remodeling and its effect on the electrical remodeling and atrial arrhythmia have never been explored.
Methods and Results—
Atrial tissue samples of 53 explanted hearts from patients with dilated cardiomyopathy and end-stage heart failure who underwent heart transplantation were examined. Nineteen patients had permanent atrial fibrillation (PmAF), 18 had persistent AF (PsAF), and 16 had no documented AF (NAF). Sixteen donor left atria (LA) were used as controls (CNs). Western Blot analysis revealed a selective downregulation of tissue inhibitor of metalloproteinase (TIMP)-2 in PmAF and PsAF groups compared with the NAF and CN groups and an upregulation of atrial metalloproteinase (MMP)-2 that was most pronounced in the PmAF group followed by the PsAF and NAF groups. Immunofluorescent staining revealed that in the LA, type I collagen volume fraction (CVF-I) increased significantly in the PmAF group followed by the PsAF and NAF groups compared with that in CN. LA CVF-I significantly correlated with LA dimension and TIMP-2 to MMP-2 ratio. In the PsAF group, CVF-I/CVF-III ratio was significantly correlated with AF duration and the frequency of AF recurrence.
Conclusions—
Atrial extracellular matrix remodeling manifested by the selective downregulation of TIMP-2 along with upregulation of MMP-2 and CVF-I in the atrium is associated with the development of sustained atrial fibrillation in patients with cardiomyopathy and heart failure.
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Affiliation(s)
- Jun Xu
- Division of Cardiology, UCLA Medical Center, 10833 Le Conte Ave, 47-123 CHS, Los Angeles, CA 90095-1679, USA.
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