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Newton JB, Weiss SN, Nuss CA, Darrieutort-Laffite C, Eekhoff JD, Birk DE, Soslowsky LJ. Decorin and/or biglycan knockdown in aged mouse patellar tendon impacts fibril morphology, scar area, and mechanical properties. J Orthop Res 2024; 42:2400-2413. [PMID: 38967120 PMCID: PMC11479833 DOI: 10.1002/jor.25931] [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: 12/28/2023] [Revised: 05/29/2024] [Accepted: 06/20/2024] [Indexed: 07/06/2024]
Abstract
Small leucine-rich proteoglycans, such as decorin and biglycan, play pivotal roles in collagen fibrillogenesis during development, healing, and aging in tendon. Previous work has shown that the absence of decorin and biglycan affects fibril shape and mechanical properties during tendon healing. However, the roles of decorin and biglycan in the healing process of aged tendons are unclear. Therefore the objective of this study was to evaluate the differential roles of decorin and biglycan during healing of patellar tendon injury in aged mice. Aged (300 days old) female Dcn+/+/Bgn+/+ control (WT, n = 52), Dcnflox/flox (I-Dcn-/-, n = 36), Bgnflox/flox (I-Bgn-/-, n = 36), and compound Dcnflox/flox/Bgnflox/flox (I-Dcn-/-/Bgn-/-, n = 36) mice with a tamoxifen-inducible Cre were utilized. Targeted gene expression, collagen fibril diameter distributions, mechanical properties, and histological assays were employed to assess the effects of knockdown of decorin and/or biglycan at the time of injury. Knockdown resulted in alterations in fibril diameter distribution and scar area, but surprisingly did not lead to many differences in mechanical properties. Biglycan played a larger role in early healing stages, while decorin is more significant in later stages, particularly in scar remodeling. This study highlights some of the differential roles of biglycan and decorin in the regulation of fibril structure and scar area, as well as influencing gene expression during healing in aged mice.
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Affiliation(s)
- Joseph B Newton
- Department of Orthopaedic Surgery, McKay Orthopaedic Research Laboratory, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Stephanie N Weiss
- Department of Orthopaedic Surgery, McKay Orthopaedic Research Laboratory, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Courtney A Nuss
- Department of Orthopaedic Surgery, McKay Orthopaedic Research Laboratory, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Christelle Darrieutort-Laffite
- Department of Orthopaedic Surgery, McKay Orthopaedic Research Laboratory, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Jeremy D Eekhoff
- Department of Orthopaedic Surgery, McKay Orthopaedic Research Laboratory, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - David E Birk
- Department of Molecular Pharmacology and Physiology, Morsani College of Medicine, University of South Florida, Tampa, Flordia, USA
| | - Louis J Soslowsky
- Department of Orthopaedic Surgery, McKay Orthopaedic Research Laboratory, University of Pennsylvania, Philadelphia, Pennsylvania, USA
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2
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Darrieutort-Laffite C, Blanchard F, Soslowsky LJ, Le Goff B. Biology and physiology of tendon healing. Joint Bone Spine 2024; 91:105696. [PMID: 38307405 DOI: 10.1016/j.jbspin.2024.105696] [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: 12/04/2023] [Revised: 01/11/2024] [Accepted: 01/23/2024] [Indexed: 02/04/2024]
Abstract
Tendon disorders affect people of all ages, from elite and recreational athletes and workers to elderly patients. After an acute injury, 3 successive phases are described to achieve healing: an inflammatory phase followed by a proliferative phase, and finally by a remodeling phase. Despite this process, healed tendon fails to recover its original mechanical properties. In this review, we proposed to describe the key factors involved in the process such as cells, transcription factors, extracellular matrix components, cytokines and growth factors and vascularization among others. A better understanding of this healing process could help provide new therapeutic approaches to improve patients' recovery while tendon disorders management remains a medical challenge.
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Affiliation(s)
- Christelle Darrieutort-Laffite
- Service de rhumatologie, CHU de Nantes, Nantes, France; Oniris, Regenerative Medicine and Skeleton, RMeS, UMR 1229, Inserm, CHU de Nantes, Nantes université, 44000 Nantes, France.
| | - Frédéric Blanchard
- Oniris, Regenerative Medicine and Skeleton, RMeS, UMR 1229, Inserm, CHU de Nantes, Nantes université, 44000 Nantes, France
| | - Louis J Soslowsky
- Department of Orthopaedic Surgery, McKay Orthopaedic Research Laboratory, University of Pennsylvania, Philadelphia, PA, USA
| | - Benoit Le Goff
- Service de rhumatologie, CHU de Nantes, Nantes, France; Oniris, Regenerative Medicine and Skeleton, RMeS, UMR 1229, Inserm, CHU de Nantes, Nantes université, 44000 Nantes, France
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3
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Papalamprou A, Yu V, Jiang W, Sheyn J, Stefanovic T, Chen A, Castaneda C, Chavez M, Sheyn D. Single Cell Transcriptomics-Informed Induced Pluripotent Stem Cells Differentiation to Tenogenic Lineage. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2023.04.10.536240. [PMID: 37090543 PMCID: PMC10120682 DOI: 10.1101/2023.04.10.536240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/25/2023]
Abstract
During vertebrate embryogenesis, axial tendons develop from the paraxial mesoderm and differentiate through specific developmental stages to reach the syndetome stage. While the main roles of signaling pathways in the earlier stages of the differentiation have been well established, pathway nuances in syndetome specification from the sclerotome stage have yet to be explored. Here, we show stepwise differentiation of human iPSCs to the syndetome stage using chemically defined media and small molecules that were modified based on single cell RNA-sequencing and pathway analysis. We identified a significant population of branching off-target cells differentiating towards a neural phenotype overexpressing Wnt. Further transcriptomics post-addition of a WNT inhibitor at the somite stage and onwards revealed not only total removal of the neural off-target cells, but also increased syndetome induction efficiency. Fine-tuning tendon differentiation in vitro is essential to address the current challenges in developing a successful cell-based tendon therapy.
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Affiliation(s)
- Angela Papalamprou
- Orthopaedic Stem Cell Research Laboratory, Cedars-Sinai Medical Center, Los Angeles, CA
- Board of Governors Regenerative Medicine Institute, Cedars-Sinai Medical Center, Los Angeles, CA
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA
| | - Victoria Yu
- Orthopaedic Stem Cell Research Laboratory, Cedars-Sinai Medical Center, Los Angeles, CA
- Board of Governors Regenerative Medicine Institute, Cedars-Sinai Medical Center, Los Angeles, CA
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA
| | - Wensen Jiang
- Orthopaedic Stem Cell Research Laboratory, Cedars-Sinai Medical Center, Los Angeles, CA
- Board of Governors Regenerative Medicine Institute, Cedars-Sinai Medical Center, Los Angeles, CA
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA
| | - Julia Sheyn
- Orthopaedic Stem Cell Research Laboratory, Cedars-Sinai Medical Center, Los Angeles, CA
- Board of Governors Regenerative Medicine Institute, Cedars-Sinai Medical Center, Los Angeles, CA
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA
| | - Tina Stefanovic
- Orthopaedic Stem Cell Research Laboratory, Cedars-Sinai Medical Center, Los Angeles, CA
- Board of Governors Regenerative Medicine Institute, Cedars-Sinai Medical Center, Los Angeles, CA
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA
| | - Angel Chen
- Orthopaedic Stem Cell Research Laboratory, Cedars-Sinai Medical Center, Los Angeles, CA
- Board of Governors Regenerative Medicine Institute, Cedars-Sinai Medical Center, Los Angeles, CA
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA
| | - Chloe Castaneda
- Orthopaedic Stem Cell Research Laboratory, Cedars-Sinai Medical Center, Los Angeles, CA
- Board of Governors Regenerative Medicine Institute, Cedars-Sinai Medical Center, Los Angeles, CA
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA
| | - Melissa Chavez
- Orthopaedic Stem Cell Research Laboratory, Cedars-Sinai Medical Center, Los Angeles, CA
- Board of Governors Regenerative Medicine Institute, Cedars-Sinai Medical Center, Los Angeles, CA
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA
| | - Dmitriy Sheyn
- Orthopaedic Stem Cell Research Laboratory, Cedars-Sinai Medical Center, Los Angeles, CA
- Board of Governors Regenerative Medicine Institute, Cedars-Sinai Medical Center, Los Angeles, CA
- Department of Orthopedics, Cedars-Sinai Medical Center, Los Angeles, CA
- Department of Surgery, Cedars-Sinai Medical Center, Los Angeles, CA
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA
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4
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Beach ZM, Nuss CA, Weiss SN, Soslowsky LJ. Neonatal Achilles Tendon Microstructure is Negatively Impacted by Decorin and Biglycan Knockdown After Injury and During Development. Ann Biomed Eng 2024; 52:657-670. [PMID: 38079083 DOI: 10.1007/s10439-023-03414-8] [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: 03/08/2023] [Accepted: 11/22/2023] [Indexed: 02/13/2024]
Abstract
Interest in studying neonatal development and the improved healing response observed in neonates is increasing, with the goal of using this work to create better therapeutics for tendon injury. Decorin and biglycan are two small leucine-rich proteoglycans that play important roles in collagen fibrillogenesis to develop, maintain, and repair tendon structure. However, little is known about the roles of decorin and biglycan in early neonatal development and healing. The goal of this study was to determine the effects of decorin and biglycan knockdown on Achilles tendon structure and mechanics during neonatal development and recovery of these properties after injury of the neonatal tendon. We hypothesized that knockdown of decorin and biglycan would disrupt the neonatal tendon developmental process and produce tendons with impaired mechanical and structural properties. We found that knockdown of decorin and biglycan in an inducible, compound decorin/biglycan knockdown model, both during development and after injury, in neonatal mice produced tendons with reduced mechanical properties. Additionally, the collagen fibril microstructure resembled an immature tendon with a large population of small diameter fibrils and an absence of larger diameter fibrils. Overall, this study demonstrates the importance of decorin and biglycan in facilitating tendon growth and maturation during neonatal development.
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Affiliation(s)
- Zakary M Beach
- McKay Orthopaedic Research Laboratory, University of Pennsylvania, Philadelphia, PA, USA
| | - Courtney A Nuss
- McKay Orthopaedic Research Laboratory, University of Pennsylvania, Philadelphia, PA, USA
| | - Stephanie N Weiss
- McKay Orthopaedic Research Laboratory, University of Pennsylvania, Philadelphia, PA, USA
| | - Louis J Soslowsky
- McKay Orthopaedic Research Laboratory, University of Pennsylvania, Philadelphia, PA, USA.
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Deng X, Li Q, Yuan H, Hu H, Fan S. Galangin Promotes Tendon Repair Mediated by Tendon-Derived Stem Cells through Activating the TGF-β1/Smad3 Signaling Pathway. Chem Pharm Bull (Tokyo) 2024; 72:669-675. [PMID: 39010213 DOI: 10.1248/cpb.c24-00117] [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] [Indexed: 07/17/2024]
Abstract
Tendon injury is a prevalent orthopedic disease that currently lacks effective treatment. Galangin (GLN) is a vital flavonoid found abundantly in galangal and is known for its natural activity. This study aimed to investigate the GLN-mediated molecular mechanism of tendon-derived stem cells (TDSCs) in tendon repair. The TDSCs were characterized using alkaline phosphatase staining, alizarin red S staining, oil red O staining, and flow cytometry. The effect of GLN treatment on collagen deposition was evaluated using Sirius red staining and quantitative (q)PCR, while a Western bot was used to assess protein levels and analyze pathways. Results showed that GLN treatment not only increased the collagen deposition but also elevated the mRNA expression and protein levels of multiple tendon markers like collagen type I alpha 1 (COL1A1), decorin (DCN) and tenomodulin (TNMD) in TDSCs. Moreover, GLN was also found to upregulate the protein levels of transforming growth factor β1 (TGF-β1) and p-Smad3 to activate the TGF-β1/Smad3 signaling pathway, while GLN mediated collagen deposition in TDSCs was reversed by LY3200882, a TGF-β receptor inhibitor. The study concluded that GLN-mediated TDSCs enhanced tendon repair by activating the TGF-β1/Smad3 signaling pathway, suggesting a novel therapeutic option in treating tendon repair.
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Affiliation(s)
- Xiongwei Deng
- Department of Foot and Ankle Surgery, Nanchang Hongdu Hospital of Traditional Chinese Medicine
| | - Qiang Li
- Department of Foot and Ankle Surgery, Nanchang Hongdu Hospital of Traditional Chinese Medicine
| | - Haitao Yuan
- Department of Foot and Ankle Surgery, Nanchang Hongdu Hospital of Traditional Chinese Medicine
| | - Hejun Hu
- Department of Foot and Ankle Surgery, Nanchang Hongdu Hospital of Traditional Chinese Medicine
| | - Shaoyong Fan
- Department of Foot and Ankle Surgery, Nanchang Hongdu Hospital of Traditional Chinese Medicine
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Kwan KYC, Ng KWK, Rao Y, Zhu C, Qi S, Tuan RS, Ker DFE, Wang DM. Effect of Aging on Tendon Biology, Biomechanics and Implications for Treatment Approaches. Int J Mol Sci 2023; 24:15183. [PMID: 37894875 PMCID: PMC10607611 DOI: 10.3390/ijms242015183] [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: 08/01/2023] [Revised: 09/07/2023] [Accepted: 09/20/2023] [Indexed: 10/29/2023] Open
Abstract
Tendon aging is associated with an increasing prevalence of tendon injuries and/or chronic tendon diseases, such as tendinopathy, which affects approximately 25% of the adult population. Aged tendons are often characterized by a reduction in the number and functionality of tendon stem/progenitor cells (TSPCs), fragmented or disorganized collagen bundles, and an increased deposition of glycosaminoglycans (GAGs), leading to pain, inflammation, and impaired mobility. Although the exact pathology is unknown, overuse and microtrauma from aging are thought to be major causative factors. Due to the hypovascular and hypocellular nature of the tendon microenvironment, healing of aged tendons and related injuries is difficult using current pain/inflammation and surgical management techniques. Therefore, there is a need for novel therapies, specifically cellular therapy such as cell rejuvenation, due to the decreased regenerative capacity during aging. To augment the therapeutic strategies for treating tendon-aging-associated diseases and injuries, a comprehensive understanding of tendon aging pathology is needed. This review summarizes age-related tendon changes, including cell behaviors, extracellular matrix (ECM) composition, biomechanical properties and healing capacity. Additionally, the impact of conventional treatments (diet, exercise, and surgery) is discussed, and recent advanced strategies (cell rejuvenation) are highlighted to address aged tendon healing. This review underscores the molecular and cellular linkages between aged tendon biomechanical properties and the healing response, and provides an overview of current and novel strategies for treating aged tendons. Understanding the underlying rationale for future basic and translational studies of tendon aging is crucial to the development of advanced therapeutics for tendon regeneration.
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Affiliation(s)
- Ka Yu Carissa Kwan
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China; (K.Y.C.K.); (K.W.K.N.); (Y.R.); (C.Z.); (R.S.T.); (D.F.E.K.)
- Institute for Tissue Engineering and Regenerative Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Ka Wai Kerry Ng
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China; (K.Y.C.K.); (K.W.K.N.); (Y.R.); (C.Z.); (R.S.T.); (D.F.E.K.)
- Institute for Tissue Engineering and Regenerative Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Ying Rao
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China; (K.Y.C.K.); (K.W.K.N.); (Y.R.); (C.Z.); (R.S.T.); (D.F.E.K.)
- Institute for Tissue Engineering and Regenerative Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Chenxian Zhu
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China; (K.Y.C.K.); (K.W.K.N.); (Y.R.); (C.Z.); (R.S.T.); (D.F.E.K.)
- Institute for Tissue Engineering and Regenerative Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Shengcai Qi
- Department of Prosthodontics, Shanghai Stomatological Hospital, Fudan University, Shanghai 200040, China;
| | - Rocky S. Tuan
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China; (K.Y.C.K.); (K.W.K.N.); (Y.R.); (C.Z.); (R.S.T.); (D.F.E.K.)
- Institute for Tissue Engineering and Regenerative Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China
- Center for Neuromusculoskeletal Restorative Medicine, Hong Kong Science Park, Hong Kong SAR, China
- Department of Orthopaedics and Traumatology, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Dai Fei Elmer Ker
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China; (K.Y.C.K.); (K.W.K.N.); (Y.R.); (C.Z.); (R.S.T.); (D.F.E.K.)
- Institute for Tissue Engineering and Regenerative Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China
- Center for Neuromusculoskeletal Restorative Medicine, Hong Kong Science Park, Hong Kong SAR, China
- Department of Orthopaedics and Traumatology, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China
- Ministry of Education Key Laboratory for Regenerative Medicine, School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Dan Michelle Wang
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China; (K.Y.C.K.); (K.W.K.N.); (Y.R.); (C.Z.); (R.S.T.); (D.F.E.K.)
- Institute for Tissue Engineering and Regenerative Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China
- Center for Neuromusculoskeletal Restorative Medicine, Hong Kong Science Park, Hong Kong SAR, China
- Department of Orthopaedics and Traumatology, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China
- Ministry of Education Key Laboratory for Regenerative Medicine, School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China
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Pechanec MY, Mienaltowski MJ. Decoding the transcriptomic expression and genomic methylation patterns in the tendon proper and its peritenon region in the aging horse. BMC Res Notes 2023; 16:267. [PMID: 37821884 PMCID: PMC10566085 DOI: 10.1186/s13104-023-06562-1] [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: 02/23/2023] [Accepted: 10/10/2023] [Indexed: 10/13/2023] Open
Abstract
OBJECTIVES Equine tendinopathies are challenging because of the poor healing capacity of tendons commonly resulting in high re-injury rates. Within the tendon, different regions - tendon proper (TP) and peritenon (PERI) - contribute to the tendon matrix in differing capacities during injury and aging. Aged tendons have decreased repair potential; the underlying transcriptional and epigenetic changes that occur in the TP and PERI regions are not well understood. The objective of this study was to assess TP and PERI regional differences in adolescent, midlife, and geriatric horses using RNA sequencing and DNA methylation techniques. RESULTS Differences existed between TP and PERI regions of equine superficial digital flexor tendons by age as evidenced by RNASeq and DNA methylation. Cluster analysis indicated that regional distinctions existed regardless of age. Genes such as DCN, COMP, FN1, and LOX maintained elevated TP expression while genes such as GSN and AHNAK were abundant in PERI. Increased gene activity was present in adolescent and geriatric populations but decreased during midlife. Regional differences in DNA methylation were also noted. Notably, when evaluating all ages of TP against PERI, five genes (HAND2, CHD9, RASL11B, ADGRD1, and COL14A1) had regions of differential methylation as well as differential gene expression.
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Affiliation(s)
- Monica Y Pechanec
- Department of Animal Science, University of California Davis, 2251 Meyer Hall, One Shields Ave, Davis, CA, 95616, USA
| | - Michael J Mienaltowski
- Department of Animal Science, University of California Davis, 2251 Meyer Hall, One Shields Ave, Davis, CA, 95616, USA.
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Leahy TP, Fung AK, Weiss SN, Dyment NA, Soslowsky LJ. Investigating the temporal roles of decorin and biglycan in tendon healing. J Orthop Res 2023; 41:2238-2249. [PMID: 37132501 PMCID: PMC10525000 DOI: 10.1002/jor.25590] [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: 11/28/2022] [Revised: 03/14/2023] [Accepted: 05/01/2023] [Indexed: 05/04/2023]
Abstract
The small leucine-rich proteoglycans, decorin and biglycan, are minor components of the tendon extracellular matrix that regulate fibrillogenesis and matrix assembly. Our study objective was to define the temporal roles of decorin and biglycan during tendon healing using inducible knockout mice to include genetic knockdown at specific phases of healing: time of injury, the proliferative phase, and the remodeling phase. We hypothesized that knockdown of decorin or biglycan would adversely affect tendon healing, and that by prescribing the timing of knockdown, we could elucidate the temporal roles of these proteins during healing. Contrary to our hypothesis, decorin knockdown did not affect tendon healing. However, when biglycan was knocked down, either alone or coupled with decorin, tendon modulus was increased relative to wild-type mice, and this finding was consistent among all induction timepoints. At 6 weeks postinjury, we observed increased expression of genes associated with the extracellular matrix and growth factor signaling in the biglycan knockdown and compound decorin-biglycan knockdown tendons. Interestingly, these groups demonstrated opposing trends in gene expression as a function of knockdown-induction timepoint, highlighting distinct temporal roles for decorin and biglycan. In summary, this study finds that biglycan plays multiple functions throughout tendon healing, with the most impactful, detrimental role likely occurring during late-stage healing. Statement of clinical importance: This study helps to define the molecular factors that regulate tendon healing, which may aid in the development of new clinical therapies.
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Affiliation(s)
- Thomas P. Leahy
- McKay Orthopaedic Laboratory, University of Pennsylvania, Philadelphia, PA, USA
- Department of Bioengineering, University of Pennsylvania, Philadelphia, PA, USA
| | - Ashley K. Fung
- McKay Orthopaedic Laboratory, University of Pennsylvania, Philadelphia, PA, USA
- Department of Bioengineering, University of Pennsylvania, Philadelphia, PA, USA
| | - Stephanie N. Weiss
- McKay Orthopaedic Laboratory, University of Pennsylvania, Philadelphia, PA, USA
| | - Nathaniel A. Dyment
- McKay Orthopaedic Laboratory, University of Pennsylvania, Philadelphia, PA, USA
- Department of Bioengineering, University of Pennsylvania, Philadelphia, PA, USA
| | - Louis J. Soslowsky
- McKay Orthopaedic Laboratory, University of Pennsylvania, Philadelphia, PA, USA
- Department of Bioengineering, University of Pennsylvania, Philadelphia, PA, USA
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9
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Darrieutort-Laffite C, Beach ZM, Weiss SN, Eekhoff JE, Soslowsky LJ. Knockdown of biglycan reveals an important role in maintenance of structural and mechanical properties during tendon aging. J Orthop Res 2023; 41:2287-2294. [PMID: 36822659 PMCID: PMC10444902 DOI: 10.1002/jor.25536] [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: 10/30/2022] [Revised: 02/09/2023] [Accepted: 02/21/2023] [Indexed: 02/25/2023]
Abstract
Biglycan, a small leucine-rich proteoglycan (SLRP), is involved in collagen fibrillogenesis and also acts as a signaling molecule. Although decorin has been considered as the primary SLRP in developing and maintaining tendon structure and mechanics, more recent work using inducible knockdown models suggests that biglycan is involved in tendon homeostasis. The purpose of the study was to determine the role of biglycan in tendon homeostasis to maintain mechanical and structural integrity in aged mice. Aged (485 days old) female Bgn+/+ control (wild type [WT], n = 16) and 16 bitransgenic conditional Bgnflox/flox mice (I-Bgn-/- , n = 16) with a tamoxifen-inducible Cre (driven by ROSA) were utilized. After biglycan knockdown, the transgenic model demonstrated effective knockdown of the target gene without any compensation from other SLRPs or type I collagen. Patellar tendon cellularity was not modified after biglycan knockdown. However, biglycan knockdown had an impact on collagen fibrillogenesis with a higher percentage of small diameter fibrils (25-45 nm) and a lower percentage of medium size fibrils (150-165 nm) in I-Bgn-/- tendons. Biglycan knockdown also induced a reduction in the midsubstance modulus and maximum stress compared to WT. Stress relaxation was reduced at 4% strain in I-Bgn-/- tendons but no changes were observed in dynamic modulus and tan delta. As in mature tendons (120 days old), this study showed significant effects of biglycan knockdown on mechanical and structural properties of aged tendons only 30 days after knockdown. These data suggest that biglycan has a major role in maintaining homeostasis in aged tendon.
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Affiliation(s)
- Christelle Darrieutort-Laffite
- Department of Orthopaedic Surgery, McKay Orthopaedic Research Laboratory, University of Pennsylvania, Philadelphia, Pennsylvania, USA
- Service de Rhumatologie, CHU Nantes, 1 place Alexis Ricordeau, 44000 Nantes, France
| | - Zakary M. Beach
- Department of Orthopaedic Surgery, McKay Orthopaedic Research Laboratory, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Stephanie N. Weiss
- Department of Orthopaedic Surgery, McKay Orthopaedic Research Laboratory, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Jeremy E. Eekhoff
- Department of Orthopaedic Surgery, McKay Orthopaedic Research Laboratory, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Louis J. Soslowsky
- Department of Orthopaedic Surgery, McKay Orthopaedic Research Laboratory, University of Pennsylvania, Philadelphia, Pennsylvania, USA
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10
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Quintero D, Perucca Orfei C, Kaplan LD, de Girolamo L, Best TM, Kouroupis D. The roles and therapeutic potentialof mesenchymal stem/stromal cells and their extracellular vesicles in tendinopathies. Front Bioeng Biotechnol 2023; 11:1040762. [PMID: 36741745 PMCID: PMC9892947 DOI: 10.3389/fbioe.2023.1040762] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Accepted: 01/04/2023] [Indexed: 01/20/2023] Open
Abstract
Tendinopathies encompass a highly prevalent, multi-faceted spectrum of disorders, characterized by activity-related pain, compromised function, and propensity for an extended absence from sport and the workplace. The pathophysiology of tendinopathy continues to evolve. For decades, it has been related primarily to repetitive overload trauma but more recently, the onset of tendinopathy has been attributed to the tissue's failed attempt to heal after subclinical inflammatory and immune challenges (failed healing model). Conventional tendinopathy management produces only short-term symptomatic relief and often results in incomplete repair or healing leading to compromised tendon function. For this reason, there has been increased effort to develop therapeutics to overcome the tissue's failed healing response by targeting the cellular metaplasia and pro-inflammatory extra-cellular environment. On this basis, stem cell-based therapies have been proposed as an alternative therapeutic approach designed to modify the course of the various tendon pathologies. Mesenchymal stem/stromal cells (MSCs) are multipotent stem cells often referred to as "medicinal signaling cells" due to their immunomodulatory and anti-inflammatory properties that can produce a pro-regenerative microenvironment in pathological tendons. However, the adoption of MSCs into clinical practice has been limited by FDA regulations and perceived risk of adverse events upon infusion in vivo. The introduction of cell-free approaches, such as the extracellular vesicles of MSCs, has encouraged new perspectives for the treatment of tendinopathies, showing promising short-term results. In this article, we review the most recent advances in MSC-based and MSC-derived therapies for tendinopathies. Preclinical and clinical studies are included with comment on future directions of this rapidly developing therapeutic modality, including the importance of understanding tissue loading and its relationship to any treatment regimen.
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Affiliation(s)
- Daniel Quintero
- Department of Orthopaedics, UHealth Sports Medicine Institute, Miller School of Medicine, University of Miami, Miami, FL, United States
| | - Carlotta Perucca Orfei
- Laboratorio di Biotecnologie Applicate all’Ortopedia, IRCCS Istituto Ortopedico Galeazzi, Milan, Italy
| | - Lee D. Kaplan
- Department of Orthopaedics, UHealth Sports Medicine Institute, Miller School of Medicine, University of Miami, Miami, FL, United States
| | - Laura de Girolamo
- Laboratorio di Biotecnologie Applicate all’Ortopedia, IRCCS Istituto Ortopedico Galeazzi, Milan, Italy
| | - Thomas M. Best
- Department of Orthopaedics, UHealth Sports Medicine Institute, Miller School of Medicine, University of Miami, Miami, FL, United States
| | - Dimitrios Kouroupis
- Department of Orthopaedics, UHealth Sports Medicine Institute, Miller School of Medicine, University of Miami, Miami, FL, United States,Diabetes Research Institute & Cell Transplant Center, Miller School of Medicine, University of Miami, Miami, FL, United States,*Correspondence: Dimitrios Kouroupis,
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Beach ZM, Fung AK, Weiss SN, Soslowsky LJ. Post-injury tendon mechanics are not affected by tamoxifen treatment. Connect Tissue Res 2023; 64:75-81. [PMID: 35816119 PMCID: PMC9832173 DOI: 10.1080/03008207.2022.2097907] [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: 12/19/2021] [Accepted: 06/29/2022] [Indexed: 02/03/2023]
Abstract
PURPOSE A growing interest in the mechanisms that govern tendon healing has resulted in the develop-ment of tools, such as the tamoxifen-inducible mouse knockdown model, to address these questions. However, tamoxifen is a selective estrogen receptor modulator and may interfere with the tendon healing process. The objective of this study was to evaluate the effects of tamoxifen on post-injury tendon mechanics in wild-type mice. METHODS The mice underwent treatment at the time of injury using an established mouse injury model and the injured tendons were evaluated 3 weeks post-injury. The treatment contained tamoxifen suspended in corn oil and was compared to a treatment with only corn oil, as well as mice with no treatment. Tendons were evaluated by measuring the quasi-static and viscoelastic mechanics, collagen fiber realignment, cellularity, and nuclear morphology. RESULTS Mechanical testing of the tendons post-injury revealed no changes to viscoelastic mechanics, quasi-static mechanics, or collagen realignment during loading after tamoxifen treatment with the dosage regimen utilized (three daily injections of 4.5 mg/40 g body weight). Additionally, histological analysis revealed no changes to cellularity or cell nuclear shape. CONCLUSION Overall, this study revealed that tamoxifen treatment at the time of tendon injury did not result in changes to tendon mechanics or the histological parameters at 3 weeks post-injury.
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Affiliation(s)
- Zakary M. Beach
- McKay Orthopaedic Research Laboratory, University of Pennsylvania, Stemmler Hall, 36th and Hamilton Walk, Philadelphia, PA 19104-6081, United States
| | - Ashley K. Fung
- McKay Orthopaedic Research Laboratory, University of Pennsylvania, Stemmler Hall, 36th and Hamilton Walk, Philadelphia, PA 19104-6081, United States
| | - Stephanie N. Weiss
- McKay Orthopaedic Research Laboratory, University of Pennsylvania, Stemmler Hall, 36th and Hamilton Walk, Philadelphia, PA 19104-6081, United States
| | - Louis J. Soslowsky
- McKay Orthopaedic Research Laboratory, University of Pennsylvania, Stemmler Hall, 36th and Hamilton Walk, Philadelphia, PA 19104-6081, United States
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Citro V, Clerici M, Boccaccini AR, Della Porta G, Maffulli N, Forsyth NR. Tendon tissue engineering: An overview of biologics to promote tendon healing and repair. J Tissue Eng 2023; 14:20417314231196275. [PMID: 37719308 PMCID: PMC10501083 DOI: 10.1177/20417314231196275] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Accepted: 08/06/2023] [Indexed: 09/19/2023] Open
Abstract
Tendons are dense connective tissues with a hierarchical polarized structure that respond to and adapt to the transmission of muscle contraction forces to the skeleton, enabling motion and maintaining posture. Tendon injuries, also known as tendinopathies, are becoming more common as populations age and participation in sports/leisure activities increases. The tendon has a poor ability to self-heal and regenerate given its intrinsic, constrained vascular supply and exposure to frequent, severe loading. There is a lack of understanding of the underlying pathophysiology, and it is not surprising that disorder-targeted medicines have only been partially effective at best. Recent tissue engineering approaches have emerged as a potential tool to drive tendon regeneration and healing. In this review, we investigated the physiochemical factors involved in tendon ontogeny and discussed their potential application in vitro to reproduce functional and self-renewing tendon tissue. We sought to understand whether stem cells are capable of forming tendons, how they can be directed towards the tenogenic lineage, and how their growth is regulated and monitored during the entire differentiation path. Finally, we showed recent developments in tendon tissue engineering, specifically the use of mesenchymal stem cells (MSCs), which can differentiate into tendon cells, as well as the potential role of extracellular vesicles (EVs) in tendon regeneration and their potential for use in accelerating the healing response after injury.
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Affiliation(s)
- Vera Citro
- School of Pharmacy and Bioengineering, Keele University, Stoke-on-Trent, Staffordshire, UK
- Department of Materials Science and Engineering, Institute of Biomaterials University of Erlangen-Nuremberg, Cauerstrasse 6, Erlangen, Germany
| | - Marta Clerici
- School of Pharmacy and Bioengineering, Keele University, Stoke-on-Trent, Staffordshire, UK
- Department of Medicine, Surgery and Dentistry, University of Salerno, via S. Allende, Baronissi, Salerno, Italy
| | - Aldo R. Boccaccini
- Department of Materials Science and Engineering, Institute of Biomaterials University of Erlangen-Nuremberg, Cauerstrasse 6, Erlangen, Germany
| | - Giovanna Della Porta
- Department of Medicine, Surgery and Dentistry, University of Salerno, via S. Allende, Baronissi, Salerno, Italy
- Interdepartmental Centre BIONAM, University of Salerno, via Giovanni Paolo I, Fisciano, Salerno, Italy
| | - Nicola Maffulli
- School of Pharmacy and Bioengineering, Keele University, Stoke-on-Trent, Staffordshire, UK
- Department of Medicine, Surgery and Dentistry, University of Salerno, via S. Allende, Baronissi, Salerno, Italy
- Department of Trauma and Orthopaedic Surgery, University Hospital ‘San Giovanni di Dio e Ruggi D’Aragona’, Salerno, Italy
| | - Nicholas R. Forsyth
- School of Pharmacy and Bioengineering, Keele University, Stoke-on-Trent, Staffordshire, UK
- Vice Principals’ Office, University of Aberdeen, Kings College, Aberdeen, UK
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Beach ZM, Bonilla KA, Dekhne MS, Sun M, Adams TH, Adams SM, Weiss SN, Rodriguez AB, Shetye SS, Birk DE, Soslowsky LJ. Biglycan has a major role in maintenance of mature tendon mechanics. J Orthop Res 2022; 40:2546-2556. [PMID: 35171523 PMCID: PMC9378794 DOI: 10.1002/jor.25299] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Revised: 02/03/2022] [Accepted: 02/13/2022] [Indexed: 02/04/2023]
Abstract
Decorin and biglycan are two small leucine-rich proteoglycans (SLRPs) that regulate collagen fibrillogenesis and extracellular matrix assembly in tendon. The objective of this study was to determine the individual roles of these molecules in maintaining the structural and mechanical properties of tendon during homeostasis in mature mice. We hypothesized that knockdown of decorin in mature tendons would result in detrimental changes to tendon structure and mechanics while knockdown of biglycan would have a minor effect on these parameters. To achieve this objective, we created tamoxifen-inducible mouse knockdown models targeting decorin or biglycan inactivation. This enables the evaluation of the roles of these SLRPs in mature tendon without the abnormal tendon development caused by conventional knockout models. Contrary to our hypothesis, knockdown of decorin resulted in minor alterations to tendon structure and no changes to mechanics while knockdown of biglycan resulted in broad changes to tendon structure and mechanics. Specifically, knockdown of biglycan resulted in reduced insertion modulus, maximum stress, dynamic modulus, stress relaxation, and increased collagen fiber realignment during loading. Knockdown of decorin and biglycan produced similar changes to tendon microstructure by increasing the collagen fibril diameter relative to wild-type controls. Biglycan knockdown also decreased the cell nuclear aspect ratio, indicating a more spindle-like nuclear shape. Overall, the extensive changes to tendon structure and mechanics after knockdown of biglycan, but not decorin, provides evidence that biglycan plays a major role in the maintenance of tendon structure and mechanics in mature mice during homeostasis.
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Affiliation(s)
- Zakary M. Beach
- McKay Orthopaedic Research Laboratory, University of Pennsylvania, Stemmler Hall, 36th and Hamilton Walk, Philadelphia, PA 19104-6081, United States
| | - Kelsey A. Bonilla
- McKay Orthopaedic Research Laboratory, University of Pennsylvania, Stemmler Hall, 36th and Hamilton Walk, Philadelphia, PA 19104-6081, United States
| | - Mihir S. Dekhne
- McKay Orthopaedic Research Laboratory, University of Pennsylvania, Stemmler Hall, 36th and Hamilton Walk, Philadelphia, PA 19104-6081, United States
| | - Mei Sun
- Department of Molecular Pharmacology & Physiology, Morsani College of Medicine, University of South Florida, Tampa, FL 33612, United States
| | - Thomas H. Adams
- Department of Molecular Pharmacology & Physiology, Morsani College of Medicine, University of South Florida, Tampa, FL 33612, United States
| | - Sheila M. Adams
- Department of Molecular Pharmacology & Physiology, Morsani College of Medicine, University of South Florida, Tampa, FL 33612, United States
| | - Stephanie N. Weiss
- McKay Orthopaedic Research Laboratory, University of Pennsylvania, Stemmler Hall, 36th and Hamilton Walk, Philadelphia, PA 19104-6081, United States
| | - Ashley B. Rodriguez
- McKay Orthopaedic Research Laboratory, University of Pennsylvania, Stemmler Hall, 36th and Hamilton Walk, Philadelphia, PA 19104-6081, United States
| | - Snehal S. Shetye
- McKay Orthopaedic Research Laboratory, University of Pennsylvania, Stemmler Hall, 36th and Hamilton Walk, Philadelphia, PA 19104-6081, United States
| | - David E. Birk
- Department of Molecular Pharmacology & Physiology, Morsani College of Medicine, University of South Florida, Tampa, FL 33612, United States
| | - Louis J. Soslowsky
- McKay Orthopaedic Research Laboratory, University of Pennsylvania, Stemmler Hall, 36th and Hamilton Walk, Philadelphia, PA 19104-6081, United States
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14
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Beach ZM, Dekhne MS, Rodriguez AB, Weiss SN, Adams TH, Adams SM, Sun M, Birk DE, Soslowsky LJ. Decorin knockdown is beneficial for aged tendons in the presence of biglycan expression. Matrix Biol Plus 2022; 15:100114. [PMID: 35818471 PMCID: PMC9270257 DOI: 10.1016/j.mbplus.2022.100114] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 05/19/2022] [Accepted: 06/14/2022] [Indexed: 11/25/2022] Open
Abstract
Decorin and biglycan are two major small leucine-rich proteoglycans (SLRPs) present in the tendon extracellular matrix that facilitate collagen fibrillogenesis, tissue turnover, and cell signal transduction. Previously, we demonstrated that knockout of decorin prevented the decline of tendon mechanical properties that are associated with aging. The objective of this study was to determine the effects of decorin and biglycan knockdown on tendon structure and mechanics in aged tendons using tamoxifen-inducible knockdown models. We hypothesized that the knockdown of decorin and compound knockdown of decorin and biglycan would prevent age-related declines in tendon mechanics and structure compared to biglycan knockdown and wild-type controls, and that these changes would be exacerbated as the tendons progress towards geriatric ages. To achieve this objective, we created tamoxifen-inducible mouse knockdown models to target decorin and biglycan gene inactivation without the abnormal tendon development associated with traditional knockout models. Knockdown of decorin led to increased midsubstance modulus and decreased stress relaxation in aged tendons. However, these changes were not sustained in the geriatric tendons. Knockdown in biglycan led to no changes in mechanics in the aged or geriatric tendons. Contrary to our hypothesis, the compound decorin/biglycan knockdown tendons did not resemble the decorin knockdown tendons, but resulted in increased viscoelastic properties in the aged and geriatric tendons. Structurally, knockdown of SLRPs, except for the 570d I-Dcn-/-/Bgn-/- group, resulted in alterations to the collagen fibril diameter relative to wild-type controls. Overall, this study identified the differential roles of decorin and biglycan throughout tendon aging in the maintenance of tendon structural and mechanical properties and revealed that the compound decorin and biglycan knockdown phenotype did not resemble the single gene decorin or biglycan models and was detrimental to tendon properties throughout aging.
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15
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Warren JR, Khalil LS, Pietroski AD, Muh SJ. Injection of adipose stem cells in the treatment of rotator cuff disease - a narrative review of current evidence. Regen Med 2022; 17:477-489. [PMID: 35586993 DOI: 10.2217/rme-2021-0166] [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: 11/21/2022] Open
Abstract
The purpose of this study is to summarize evidence for the use of adipose stem cell (ASC) injections in the treatment of rotator cuff tears (RCT) and identify future areas of study. A thorough literature search was performed to identify studies investigating the use of ASC injections in the treatment of RCTs. Among animal trials, it is unclear whether ASCs are of benefit for rotator cuff repair. In clinical trials, ASC injection may reduce retear rate with otherwise equivocal clinical outcomes. Although ASC injection may be safe, the literature does not provide a clear consensus as to the efficacy of ASC injections, nor does it delineate which patients would benefit most from this treatment.
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Affiliation(s)
- Jonathan R Warren
- Department of Orthopedic Surgery, Henry Ford Hospital, Detroit, MI 48202, USA
| | - Lafi S Khalil
- Department of Orthopedic Surgery, Henry Ford Hospital, Detroit, MI 48202, USA
| | | | - Stephanie J Muh
- Department of Orthopedic Surgery, Henry Ford Hospital, Detroit, MI 48202, USA
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16
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Xu X, Ha P, Yen E, Li C, Zheng Z. Small Leucine-Rich Proteoglycans in Tendon Wound Healing. Adv Wound Care (New Rochelle) 2022; 11:202-214. [PMID: 34978952 DOI: 10.1089/wound.2021.0069] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Significance: Tendon injury possesses a high morbidity rate and is difficult to achieve a satisfying prognosis with currently available treatment strategies. Current approaches used for tendon healing always lead to the formation of fibrovascular scar tissue, which significantly compromises the biomechanics of the healed tendon. Moreover, the related functional deficiency deteriorates over time with an increased injury recurrence risk. Small leucine-rich proteoglycans (SLRPs) link and interact with collagen fibrils to regulate tendon structure and biomechanics, which can provide a new and promising method in the field of tendon injury management. Recent Advances: The effect of SLRPs on tendon development has been extensively investigated. SLRP deficiency impairs tendon collagen fibril structure and biomechanic properties, while administration of SLRPs generally benefits tendon wound healing and regains better mechanical properties. Critical Issues: Current knowledge on the role of SLRPs in tendon development and regeneration mostly comes from uninjured knockout mice, and mainly focuses on the morphology description of collagen fibril profile and mechanical properties. Little is known about the regulatory mechanism on the molecular level. Future Directions: This article reviews the current knowledge in this highly translational topic and provides an evidence-based conclusion, thereby encouraging in-depth investigations of SLRPs in tendons and the development of SLRP-based treatments for desired tendon healing.
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Affiliation(s)
- Xue Xu
- Department of Oral and Maxillofacial Plastic and Traumatic Surgery, Beijing Stomatological Hospital of Capital Medical University, Beijing, People's Republic of China
- Division of Growth and Development, School of Dentistry, University of California, Los Angeles, Los Angeles, California, USA
| | - Pin Ha
- Division of Growth and Development, School of Dentistry, University of California, Los Angeles, Los Angeles, California, USA
| | - Emily Yen
- Arcadia High School, Arcadia, California, USA
| | - Chenshuang Li
- Department of Orthodontics, School of Dental Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Zhong Zheng
- Division of Growth and Development, School of Dentistry, University of California, Los Angeles, Los Angeles, California, USA
- Division of Plastic and Reconstructive Surgery, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, California, USA
- Orthodontics, School of Dentistry, University of California, Los Angeles, Los Angeles, California, USA
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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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A Hyperglycemic Microenvironment Inhibits Tendon-to-Bone Healing through the let-7b-5p/CFTR Pathway. COMPUTATIONAL AND MATHEMATICAL METHODS IN MEDICINE 2022; 2022:8268067. [PMID: 35126637 PMCID: PMC8813224 DOI: 10.1155/2022/8268067] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Revised: 12/03/2021] [Accepted: 12/09/2021] [Indexed: 12/17/2022]
Abstract
Background Tendon-to-bone healing is a difficult process in treatment of rotator cuff tear (RCT). In addition, diabetes is an important risk factor for poor tendon-to-bone healing. Therefore, we investigated the specific mechanisms through which diabetes affects tendon-to-bone healing by regulating the Cystic Fibrosis Transmembrane Conductance Regulator (CFTR). Methods Tendon-derived stem cells (TDSCs) were extracted from rats after which their proliferative capacities were evaluated by the MTT assay. The expression levels of CFTR and tendon-related markers were determined by qRT-PCR. Then, bioinformatics analyses and dual luciferase reporter gene assays were used to identify miRNAs with the ability to bind CFTR mRNA. Finally, CFTR was overexpressed in TDSCs to validate the specific mechanisms through which the high glucose microenvironment inhibits tendon-to-bone healing. Results The high glucose microenvironment downregulated mRNA expression levels of tendon-related markers and CFTR in TDSCs cultured with different glucose concentrations. Additionally, bioinformatics analyses revealed that let-7b-5p may be regulated by the high glucose microenvironment and can regulate CFTR levels. Moreover, a dual luciferase reporter gene assay was used to confirm that let-7b-5p targets and binds CFTR mRNA. Additional experiments also confirmed that overexpressed CFTR effectively reversed the negative effects of the hyperglycaemic microenvironment and upregulation of let-7b-5p on TDSC proliferation and differentiation. These findings imply that the hyperglycemic microenvironment inhibits CFTR transcription and, consequently, proliferation and differentiation of TDSCs in vitro by upregulating let-7b-5p. Conclusions A hyperglycemic microenvironment inhibits TDSC proliferation in vitro via the let-7b-5p/CFTR pathway, and this is a potential mechanism in diabetes-induced poor tendon-to-bone healing.
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Chen SH, Chen ZY, Lin YH, Chen SH, Chou PY, Kao HK, Lin FH. Extracellular Vesicles of Adipose-Derived Stem Cells Promote the Healing of Traumatized Achilles Tendons. Int J Mol Sci 2021; 22:ijms222212373. [PMID: 34830254 PMCID: PMC8618291 DOI: 10.3390/ijms222212373] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Revised: 11/11/2021] [Accepted: 11/13/2021] [Indexed: 12/12/2022] Open
Abstract
Healing of ruptured tendons remains a clinical challenge because of its slow progress and relatively weak mechanical force at an early stage. Extracellular vesicles (EVs) derived from mesenchymal stem cells (MSCs) have therapeutic potential for tissue regeneration. In this study, we isolated EVs from adipose-derived stem cells (ADSCs) and evaluated their ability to promote tendon regeneration. Our results indicated that ADSC-EVs significantly enhanced the proliferation and migration of tenocytes in vitro. To further study the roles of ADSC-EVs in tendon regeneration, ADSC-EVs were used in Achilles tendon repair in rabbits. The mechanical strength, histology, and protein expression in the injured tendon tissues significantly improved 4 weeks after ADSC-EV treatment. Decorin and biglycan were significantly upregulated in comparison to the untreated controls. In summary, ADSC-EVs stimulated the proliferation and migration of tenocytes and improved the mechanical strength of repaired tendons, suggesting that ADSC-EV treatment is a potential highly potent therapeutic strategy for tendon injuries.
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Affiliation(s)
- Shih-Heng Chen
- Institute of Biomedical Engineering, College of Medicine and College of Engineering, National Taiwan University, Taipei 10617, Taiwan; (S.-H.C.); (Z.-Y.C.); (S.-H.C.)
- Department of Plastic and Reconstructive Surgery, Chang Gung Memorial Hospital, Chang Gung University and Medical College, Taoyuan 33305, Taiwan; (Y.-H.L.); (P.-Y.C.)
| | - Zhi-Yu Chen
- Institute of Biomedical Engineering, College of Medicine and College of Engineering, National Taiwan University, Taipei 10617, Taiwan; (S.-H.C.); (Z.-Y.C.); (S.-H.C.)
- Division of Biomedical Engineering and Nanomedicine Research, National Health Research Institutes, Miaoli 35053, Taiwan
| | - Ya-Hsuan Lin
- Department of Plastic and Reconstructive Surgery, Chang Gung Memorial Hospital, Chang Gung University and Medical College, Taoyuan 33305, Taiwan; (Y.-H.L.); (P.-Y.C.)
| | - Shih-Hsien Chen
- Institute of Biomedical Engineering, College of Medicine and College of Engineering, National Taiwan University, Taipei 10617, Taiwan; (S.-H.C.); (Z.-Y.C.); (S.-H.C.)
- Department of Plastic and Reconstructive Surgery, Chang Gung Memorial Hospital, Chang Gung University and Medical College, Taoyuan 33305, Taiwan; (Y.-H.L.); (P.-Y.C.)
| | - Pang-Yun Chou
- Department of Plastic and Reconstructive Surgery, Chang Gung Memorial Hospital, Chang Gung University and Medical College, Taoyuan 33305, Taiwan; (Y.-H.L.); (P.-Y.C.)
| | - Huang-Kai Kao
- Department of Plastic and Reconstructive Surgery, Chang Gung Memorial Hospital, Chang Gung University and Medical College, Taoyuan 33305, Taiwan; (Y.-H.L.); (P.-Y.C.)
- Correspondence: (H.-K.K.); (F.-H.L.); Tel.: +886-328-1200 (ext. 3355) (H.-K.K.); +886-928-260-400 (F.-H.L.)
| | - Feng-Huei Lin
- Institute of Biomedical Engineering, College of Medicine and College of Engineering, National Taiwan University, Taipei 10617, Taiwan; (S.-H.C.); (Z.-Y.C.); (S.-H.C.)
- Division of Biomedical Engineering and Nanomedicine Research, National Health Research Institutes, Miaoli 35053, Taiwan
- Correspondence: (H.-K.K.); (F.-H.L.); Tel.: +886-328-1200 (ext. 3355) (H.-K.K.); +886-928-260-400 (F.-H.L.)
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Taguchi T, Zhang N, Angibeau D, Spivey KP, Lopez MJ. Evaluation of canine adipose-derived multipotent stromal cell differentiation to ligamentoblasts on tensioned collagen type I templates in a custom bioreactor culture system. Am J Vet Res 2021; 82:924-934. [PMID: 34669492 DOI: 10.2460/ajvr.82.11.924] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To evaluate differentiation of canine adipose-derived multipotent stromal cells (ASCs) into ligamentoblasts on tensioned collagen type I (Col1) templates in a perfusion culture system. SAMPLES Infrapatellar fat pad ASCs from healthy stifle joints of 6 female mixed-breed dogs. PROCEDURES Third-passage ASCs (6 × 106 cells/template) were loaded onto suture-augmented Col1 templates under 15% static strain in perfusion bioreactors. Forty-eight ASC-Col1 constructs were incubated with ligamentogenic (ligamentogenic constructs; n = 24) or stromal medium (stromal constructs; 24) for up to 21 days. Specimens were collected from each construct after 2 hours (day 0) and 7, 14, and 21 days of culture. Cell number, viability, distribution, and morphology; construct collagen content; culture medium procollagen-I-N-terminal peptide concentration; and gene expression were compared between ligamentogenic and stromal constructs. RESULTS ASCs adhered to collagen fibers. Cell numbers increased from days 0 to 7 and days 14 to 21 for both construct types. Relative to stromal constructs, cell morphology and extracellular matrix were more mature and collagen content on day 21 and procollagen-I-N-terminal peptide concentration on days 7 and 21 were greater for ligamentogenic constructs. Ligamentogenic constructs had increased expression of the genes biglycan on day 7, decorin throughout the culture period, and Col1, tenomodulin, fibronectin, and tenascin-c on day 21; expression of Col1, tenomodulin, and tenascin-c increased between days 7 and 21. CONCLUSIONS AND CLINICAL RELEVANCE Ligamentogenic medium was superior to stromal medium for differentiation of ASCs to ligamentoblasts on suture-augmented Col1 scaffolds. Customized ligament neotissue may augment treatment options for dogs with cranial cruciate ligament rupture.
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Affiliation(s)
- Takashi Taguchi
- From the Laboratory for Equine and Comparative Orthopedic Research, Department of Veterinary Clinical Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, LA 70803
| | - Nan Zhang
- From the Laboratory for Equine and Comparative Orthopedic Research, Department of Veterinary Clinical Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, LA 70803
| | - Dominique Angibeau
- From the Laboratory for Equine and Comparative Orthopedic Research, Department of Veterinary Clinical Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, LA 70803
| | - Kathryn P Spivey
- From the Laboratory for Equine and Comparative Orthopedic Research, Department of Veterinary Clinical Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, LA 70803
| | - Mandi J Lopez
- From the Laboratory for Equine and Comparative Orthopedic Research, Department of Veterinary Clinical Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, LA 70803
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21
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Silver FH, Kelkar N, Deshmukh T. Molecular Basis for Mechanical Properties of ECMs: Proposed Role of Fibrillar Collagen and Proteoglycans in Tissue Biomechanics. Biomolecules 2021; 11:1018. [PMID: 34356642 PMCID: PMC8301845 DOI: 10.3390/biom11071018] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Revised: 07/05/2021] [Accepted: 07/06/2021] [Indexed: 02/07/2023] Open
Abstract
Collagen and proteoglycans work in unison in the ECM to bear loads, store elastic energy and then dissipate excess energy to avoid tissue fatigue and premature mechanical failure. While collagen fibers store elastic energy by stretching the flexible regions in the triple helix, they do so by lowering their free energy through a reduction in the entropy and a decrease in charge-charge repulsion. Entropic increases occur when the load is released that drive the reversibility of the process and transmission of excess energy. Energy is dissipated by sliding of collagen fibrils by each other with the aid of decorin molecules that reside on the d and e bands of the native D repeat pattern. Fluid flow from the hydration layer associated with the decorin and collagen fibrils hydraulically dissipates energy during sliding. The deformation is reversed by osmotic forces that cause fluid to reform a hydration shell around the collagen fibrils when the loads are removed. In this paper a model is presented describing the organization of collagen fibers in the skin and cell-collagen mechanical relationships that exist based on non-invasive measurements made using vibrational optical coherence tomography. It is proposed that under external stress, collagen fibers form a tensional network in the plane of the skin. Collagen fiber tension along with forces generated by fibroblasts exerted on collagen fibers lead to an elastic modulus that is almost uniform throughout the plane of the skin. Tensile forces acting on cells and tissues may provide a baseline for stimulation of normal mechanotransduction. We hypothesize that during aging, changes in cellular metabolism, cell-collagen interactions and light and UV light exposure cause down regulation of mechanotransduction and tissue metabolism leading to tissue atrophy.
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Affiliation(s)
- Frederick H. Silver
- Department of Pathology and Laboratory Medicine, Robert Wood Johnson Medical School, Rutgers, The State University of New Jersey, Piscataway, NJ 08854, USA
- OptoVibronex, LLC., Allentown, PA 18104, USA; (N.K.); (T.D.)
| | - Nikita Kelkar
- OptoVibronex, LLC., Allentown, PA 18104, USA; (N.K.); (T.D.)
| | - Tanmay Deshmukh
- OptoVibronex, LLC., Allentown, PA 18104, USA; (N.K.); (T.D.)
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22
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Kędzierski W, Kowalik S, Mojsym W, Janczarek I, Tkaczyk E. Plasma Activin A and Decorin in Exercised Purebred Arabian Horses - Preliminary Study. J Equine Vet Sci 2021; 102:103638. [PMID: 34119190 DOI: 10.1016/j.jevs.2021.103638] [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: 10/27/2020] [Revised: 04/01/2021] [Accepted: 04/19/2021] [Indexed: 11/29/2022]
Abstract
Development of the musculoskeletal system occurs, in part, through an impact on regulatory proteins, such as activin A and decorin. Activin A induces atrophic effects on skeletal muscle, and decorin regulates the formation of connective tissue proteins like collagen and elastin in tendons and ligaments. The aim of this study was to evaluate the influence of different intensities of exercise on blood plasma activin A and decorin concentrations in horses. Ten young purebred Arabian horses were subjected to routine training sessions on a racetrack, and another 11 adult horses of the same breed participated in endurance rides. Race horses were examined during gallop tests over a distance of 1200 m and endurance horses at distances from 20 to 80 km. Blood samples were collected at rest and after exercise to determine plasma concentrations of activin A, decorin and cortisol. Despite differences in the intensity of exercise, the plasma decorin concentration remained unchanged, and activin A tended to decrease in endurance horses only. The exercise-induced changes in plasma activin A concentrations correlated with the covered distance (r = -0.43; P < .05), but not with the changes in cortisol values. Further studies are needed to confirm the usefulness of plasma activin A as a potential indicator of a horse's endurance performance.
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Affiliation(s)
- Witold Kędzierski
- Department of Biochemistry, Faculty of Veterinary Medicine, University of Life Sciences in Lublin, Lublin, Poland
| | - Sylwester Kowalik
- Department of Animal Physiology, Faculty of Veterinary Medicine, University of Life Sciences in Lublin, Lublin, Poland.
| | - Wioleta Mojsym
- Department of Biochemistry, Faculty of Veterinary Medicine, University of Life Sciences in Lublin, Lublin, Poland
| | - Iwona Janczarek
- Department of Horse Breeding and Use, Faculty of Animal Science and Bioeconomy, University of Life Sciences in Lublin, Lublin, Poland
| | - Ewelina Tkaczyk
- Department of Horse Breeding and Use, Faculty of Animal Science and Bioeconomy, University of Life Sciences in Lublin, Lublin, Poland
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23
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Zahn I, Stöbener DD, Weinhart M, Gögele C, Breier A, Hahn J, Schröpfer M, Meyer M, Schulze-Tanzil G. Cruciate Ligament Cell Sheets Can Be Rapidly Produced on Thermoresponsive poly(glycidyl ether) Coating and Successfully Used for Colonization of Embroidered Scaffolds. Cells 2021; 10:cells10040877. [PMID: 33921450 PMCID: PMC8069541 DOI: 10.3390/cells10040877] [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: 02/27/2021] [Revised: 04/04/2021] [Accepted: 04/07/2021] [Indexed: 01/14/2023] Open
Abstract
Anterior cruciate ligament (ACL) cell sheets combined with biomechanically competent scaffolds might facilitate ACL tissue engineering. Since thermoresponsive polymers allow a rapid enzyme-free detachment of cell sheets, we evaluated the applicability of a thermoresponsive poly(glycidyl ether) (PGE) coating for cruciate ligamentocyte sheet formation and its influence on ligamentocyte phenotype during sheet-mediated colonization of embroidered scaffolds. Ligamentocytes were seeded on surfaces either coated with PGE or without coating. Detached ligamentocyte sheets were cultured separately or wrapped around an embroidered scaffold made of polylactide acid (PLA) and poly(lactic-co-ε-caprolactone) (P(LA-CL)) threads functionalized by gas-phase fluorination and with collagen foam. Ligamentocyte viability, protein and gene expression were determined in sheets detached from surfaces with or without PGE coating, scaffolds seeded with sheets from PGE-coated plates and the respective monolayers. Stable and vital ligamentocyte sheets could be produced within 24 h with both surfaces, but more rapidly with PGE coating. PGE did not affect ligamentocyte phenotype. Scaffolds could be colonized with sheets associated with high cell survival, stable gene expression of ligament-related type I collagen, decorin, tenascin C and Mohawk after 14 d and extracellular matrix (ECM) deposition. PGE coating facilitates ligamentocyte sheet formation, and sheets colonizing the scaffolds displayed a ligament-related phenotype.
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Affiliation(s)
- Ingrid Zahn
- Institute of Anatomy and Cell Biology, Paracelsus Medical University, Nuremberg and Salzburg, Prof. Ernst Nathan Str. 1, 90419 Nuremberg, Germany; (I.Z.); (C.G.)
- Department of Applied Chemistry, Nuremberg Institute of Technology Georg Simon Ohm, Keßlerplatz 12, 90489 Nuremberg, Germany
- Institute of Functional and Clinical Anatomy, Friedrich Alexander University, Erlangen-Nuremberg, Universitätsstr. 19, 91054 Erlangen, Germany
| | - Daniel David Stöbener
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Takustrasse 3, 14195 Berlin, Germany; (D.D.S.); (M.W.)
- Institute of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, Callinstr. 3A, 30167 Hannover, Germany
| | - Marie Weinhart
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Takustrasse 3, 14195 Berlin, Germany; (D.D.S.); (M.W.)
- Institute of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, Callinstr. 3A, 30167 Hannover, Germany
| | - Clemens Gögele
- Institute of Anatomy and Cell Biology, Paracelsus Medical University, Nuremberg and Salzburg, Prof. Ernst Nathan Str. 1, 90419 Nuremberg, Germany; (I.Z.); (C.G.)
- Department of Biosciences, Paris Lodron University Salzburg, Hellbrunnerstraße 34, 5020 Salzburg, Austria
| | - Annette Breier
- Leibniz-Institut für Polymerforschung Dresden e. V. (IPF), Hohe Straße 6, 01069 Dresden, Germany; (A.B.); (J.H.)
| | - Judith Hahn
- Leibniz-Institut für Polymerforschung Dresden e. V. (IPF), Hohe Straße 6, 01069 Dresden, Germany; (A.B.); (J.H.)
| | - Michaela Schröpfer
- FILK Freiberg Institute (FILK), Meißner Ring 1-5, 09599 Freiberg, Germany; (M.S.); (M.M.)
| | - Michael Meyer
- FILK Freiberg Institute (FILK), Meißner Ring 1-5, 09599 Freiberg, Germany; (M.S.); (M.M.)
| | - Gundula Schulze-Tanzil
- Institute of Anatomy and Cell Biology, Paracelsus Medical University, Nuremberg and Salzburg, Prof. Ernst Nathan Str. 1, 90419 Nuremberg, Germany; (I.Z.); (C.G.)
- Correspondence: ; Tel.: +49-911-398-(11)-6772
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24
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Choi HMC, Cheung AKK, Ng MCH, Zheng Y, Jan YK, Cheing GLY. Indentation Stiffness Measurement by an Optical Coherence Tomography-Based Air-Jet Indentation System Can Reflect Type I Collagen Abundance and Organisation in Diabetic Wounds. Front Bioeng Biotechnol 2021; 9:648453. [PMID: 33748093 PMCID: PMC7969662 DOI: 10.3389/fbioe.2021.648453] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Accepted: 02/09/2021] [Indexed: 11/13/2022] Open
Abstract
There is a lack of quantitative and non-invasive clinical biomechanical assessment tools for diabetic foot ulcers. Our previous study reported that the indentation stiffness measured by an optical coherence tomography-based air-jet indentation system in a non-contact and non-invasive manner may reflect the tensile properties of diabetic wounds. As the tensile properties are known to be contributed by type I collagen, this study was aimed to establish the correlations between the indentation stiffness, and type I collagen abundance and organisation, in order to further justify and characterise the in vivo indentation stiffness measurement in diabetic wounds. In a male streptozotocin-induced diabetic rat model, indentation stiffness, and type I collagen abundance and organisation of excisional wounds were quantified and examined using the optical coherence tomography-based air-jet indentation system and picrosirius red polarised light microscopy, respectively, on post-wounding days 3, 5, 7, 10, 14, and 21. The results showed significant negative correlations between indentation stiffness at the wound centre, and the collagen abundance and organisation. The correlations between the indentation stiffness, as well as collagen abundance and organisation of diabetic wounds suggest that the optical coherence tomography-based air-jet indentation system can potentially be used to quantitatively and non-invasively monitor diabetic wound healing in clinical settings, clinical research or preclinical research.
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Affiliation(s)
- Harry Ming Chun Choi
- Department of Rehabilitation Sciences, The Hong Kong Polytechnic University, Kowloon, Hong Kong
| | - Alex Kwok-Kuen Cheung
- Department of Rehabilitation Sciences, The Hong Kong Polytechnic University, Kowloon, Hong Kong
| | - Michelle Chun Har Ng
- Department of Rehabilitation Sciences, The Hong Kong Polytechnic University, Kowloon, Hong Kong
| | - Yongping Zheng
- Department of Biomedical Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong
| | - Yih-Kuen Jan
- Department of Kinesiology and Community Health, University of Illinois at Urbana-Champaign, Urbana, IL, United States
| | - Gladys Lai Ying Cheing
- Department of Rehabilitation Sciences, The Hong Kong Polytechnic University, Kowloon, Hong Kong
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25
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Chen P, Cui L, Fu SC, Shen L, Zhang W, You T, Ong TY, Liu Y, Yung SH, Jiang C. The 3D-Printed PLGA Scaffolds Loaded with Bone Marrow-Derived Mesenchymal Stem Cells Augment the Healing of Rotator Cuff Repair in the Rabbits. Cell Transplant 2020; 29:963689720973647. [PMID: 33300392 PMCID: PMC7873762 DOI: 10.1177/0963689720973647] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The healing of tendon-bone in the rotator cuff is featured by the formation of the scar tissues in the interface after repair. This study aimed to determine if the 3D-printed poly lactic-co-glycolic acid (PLGA) scaffolds loaded with bone marrow-derived mesenchymal stem cells (BMSCs) could augment the rotator cuff repair in the rabbits. PLGA scaffolds were generated by the 3D-printed technology; Cell Counting Kit-8 assay evaluated the proliferation of BMSCs; the mRNA and protein expression levels were assessed by quantitative real-time polymerase chain reaction and western blot, respectively; immunohistology evaluated the rotator cuff repair; biomechanical characteristics of the repaired tissues were also assessed. 3D-printed PLGA scaffolds showed good biocompatibility without affecting the proliferative ability of BMSCs. BMSCs-PLGA scaffolds implantation enhanced the cell infiltration into the tendon-bone injunction at 4 weeks after implantation and improved the histology score in the tendon tissues after implantation. The mRNA expression levels of collagen I, III, tenascin, and biglycan were significantly higher in the scaffolds + BMSCs group at 4 weeks post-implantation than that in the scaffolds group. At 8 and 12 weeks after implantation, the biglycan mRNA expression level in the BMSCs-PLGA scaffolds group was significantly lower than that in the scaffolds group. BMSCs-PLGA scaffolds implantation enhanced collagen formation and increased collagen dimeter in the tendon-bone interface. The biomechanical analysis showed that BMSCs-PLGA scaffolds implantation improved the biomechanical properties of the regenerated tendon. The combination of 3D-printed PLGA scaffolds with BMSCs can augment the tendon-bone healing in the rabbit rotator cuff repair model.
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Affiliation(s)
- Peng Chen
- Department of Sports Medicine, Peking University Shenzhen Hospital, Shenzhen, Guangdong Province, China.,*Both the authors contributed equally to this article
| | - Lei Cui
- Clinical College of Peking University Shenzhen Hospital, Anhui Medical University, Hefei, China.,*Both the authors contributed equally to this article
| | - Sai Chuen Fu
- Department of Orthopaedics and Traumatology, Faculty of Medicine, The Chinese University of Hong Kong, China
| | - Li Shen
- Department of Clinical Laboratory, Maternity and Child-Care Hospital of Pingshan District, Shenzhen, Guangdong Province, China
| | - Wentao Zhang
- Department of Sports Medicine, Peking University Shenzhen Hospital, Shenzhen, Guangdong Province, China
| | - Tian You
- Department of Sports Medicine, Peking University Shenzhen Hospital, Shenzhen, Guangdong Province, China
| | - Tim-Yun Ong
- Department of Orthopaedics and Traumatology, Faculty of Medicine, The Chinese University of Hong Kong, China
| | - Yang Liu
- Department of Orthopaedics and Traumatology, Faculty of Medicine, The Chinese University of Hong Kong, China
| | - Shu-Hang Yung
- Department of Orthopaedics and Traumatology, Faculty of Medicine, The Chinese University of Hong Kong, China
| | - Changqing Jiang
- Department of Sports Medicine, Peking University Shenzhen Hospital, Shenzhen, Guangdong Province, China
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26
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Pechanec MY, Boyd TN, Baar K, Mienaltowski MJ. Adding exogenous biglycan or decorin improves tendon formation for equine peritenon and tendon proper cells in vitro. BMC Musculoskelet Disord 2020; 21:627. [PMID: 32967653 PMCID: PMC7513506 DOI: 10.1186/s12891-020-03650-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/09/2020] [Accepted: 09/15/2020] [Indexed: 12/17/2022] Open
Abstract
Background Tendon injuries amount to one of the leading causes of career-ending injuries in horses due to the inability for tendon to completely repair and the high reinjury potential. As a result, novel therapeutics are necessary to improve repair with the goal of decreasing leg lameness and potential reinjury. Small leucine-rich repeat proteoglycans (SLRPs), a class of regulatory molecules responsible for collagen organization and maturation, may be one such therapeutic to improve tendon repair. Before SLRP supplementation can occur in vivo, proper evaluation of the effect of these molecules in vitro needs to be assessed. The objective of this study was to evaluate the effectiveness of purified bovine biglycan or decorin on tendon proper and peritenon cell populations in three-dimensional tendon constructs. Methods Equine tendon proper or peritenon cell seeded fibrin three-dimensional constructs were supplemented with biglycan or decorin at two concentrations (5 nM or 25 nM). The functionality and ultrastructural morphology of the constructs were assessed using biomechanics, collagen content analysis, transmission electron microscopy (TEM), and gene expression by real time – quantitative polymerase chain reaction (RT-qPCR). Results SLRP supplementation affected both tendon proper and peritenon cells-seeded constructs. With additional SLRPs, material and tensile properties of constructs strengthened, though ultrastructural analyses indicated production of similar-sized or smaller fibrils. Overall expression of tendon markers was bolstered more in peritenon cells supplemented with either SLRP, while supplementation of SLRPs to TP cell-derived constructs demonstrated fewer changes in tendon and extracellular matrix markers. Moreover, relative to non-supplemented tendon proper cell-seeded constructs, SLRP supplementation of the peritenon cells showed increases in mechanical strength, material properties, and collagen content. Conclusions The SLRP-supplemented peritenon cells produced constructs with greater mechanical and material properties than tendon proper seeded constructs, as well as increased expression of matrix assembly molecules. These findings provide evidence that SLRPs should be further investigated for their potential to improve tendon formation in engineered grafts or post-injury.
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Affiliation(s)
- Monica Y Pechanec
- Department of Animal Science, University of California Davis, 2251 Meyer Hall, One Shields Ave, Davis, CA, 95616, USA
| | - Tannah N Boyd
- Department of Animal Science, University of California Davis, 2251 Meyer Hall, One Shields Ave, Davis, CA, 95616, USA
| | - Keith Baar
- Department of Neurobiology, Physiology, and Behavior, University of California Davis, 195 Briggs Hall, One Shields Ave, Davis, CA, 95616, USA.,Department of Physiology and Membrane Biology, University of California Davis School of Medicine, 195 Briggs Hall, One Shields Ave, Davis, CA, 95616, USA
| | - Michael J Mienaltowski
- Department of Animal Science, University of California Davis, 2251 Meyer Hall, One Shields Ave, Davis, CA, 95616, USA.
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27
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Martin CL, Bergman MR, Deravi LF, Paten JA. A Role for Monosaccharides in Nucleation Inhibition and Transport of Collagen. Bioelectricity 2020; 2:186-197. [PMID: 34471846 DOI: 10.1089/bioe.2020.0013] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Background: Collagenous tissues are composed of precisely oriented, tightly packed collagen fibril bundles to confer the maximal strength within the smallest volume. While this compact form benefits mobility, it consequentially restricts vascularity and cell density to a minimally viable level in some regions. These tissues reside in a homeostatic state with an unstable equilibrium, where perturbations to structure or molecular milieu cause descension into a long-term compromised state. Several studies have shown that glycosaminoglycans are key molecules required for healthy tissue maintenance. Our long-term goal is to determine if glycosaminoglycans serve a critical function of stabilizing soluble monomeric collagen in the interstitial fluid that bathes tissue for immediate availability in tissue development and repair in vivo. Materials and Methods: To test glycosaminoglycan and collagen interactions at the most fundamental level, we have explored the effect of the monosaccharides that populate the glycosaminoglycans of the extracellular matrix on collagen assembly kinetics, pre-established matrix stability, and collagen incorporation into a preassembled matrix. Results: Results showed that monosaccharides increased the threshold concentration required for spontaneous polymerization by at least three orders of magnitude. When the monosaccharides were introduced to a pre-existing collagen network, fibrillar dissociation was undetectable. Fluorescent-labeling studies illustrated that in the presence of the saccharide solution, soluble collagen maintains the functional capacity to integrate into a pre-existing network. Conclusion: This work demonstrates a feasible role for glycosaminoglycans in supporting tissue remodeling and highlights the potential importance of age-related deterioration of glycosaminoglycan biosynthesis in reference to the homeostasis of collagen-based tissues.
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Affiliation(s)
- Cassandra L Martin
- Department of Chemistry and Chemical Biology, Northeastern University, Boston, Massachusetts, USA
| | - Michael R Bergman
- Department of Chemistry and Chemical Biology, Northeastern University, Boston, Massachusetts, USA
| | - Leila F Deravi
- Department of Chemistry and Chemical Biology, Northeastern University, Boston, Massachusetts, USA
| | - Jeffrey A Paten
- Department of Chemistry and Chemical Biology, Northeastern University, Boston, Massachusetts, USA.,John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts, USA
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28
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Paredes J, Marvin JC, Vaughn B, Andarawis-Puri N. Innate tissue properties drive improved tendon healing in MRL/MpJ and harness cues that enhance behavior of canonical healing cells. FASEB J 2020; 34:8341-8356. [PMID: 32350938 DOI: 10.1096/fj.201902825rr] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Revised: 04/03/2020] [Accepted: 04/10/2020] [Indexed: 12/21/2022]
Abstract
Development of tendon therapeutics has been hindered by the lack of informative adult mammalian models of regeneration. Murphy Roth's Large (MRL/MpJ) mice exhibit improved healing following acute tendon injuries, but the driver of this regenerative healing response remains unknown. The tissue-specific attributes of this healing response, despite a shared systemic environment within the mouse, support the hypothesis of a tissue-driven mechanism for scarless healing. Our objective was to investigate the potential of MRL/MpJ tendon extracellular matrix (ECM)-derived coatings to regulate scar-mediated healing. We found that deviations in the composition of key structural proteins within MRL/MpJ vs C57Bl/6 tendons occur synergistically to mediate the improvements in structure and mechanics following a 1-mm midsubstance injury. Improvement in mechanical properties of healing MRL/MpJ vs C57Bl/6 tendons that were isolated from systemic contributions via organ culture, highlighted the innate tendon environment as the driver of scarless healing. Finally, we established that decellularized coatings derived from early-deposited MRL/MpJ tendon provisional extracellular matrix (provisional-ECM), can modulate canonical healing B6 tendon cell behavior by inducing morphological changes and increasing proliferation in vitro. This study supports that the unique compositional cues in MRL/MpJ provisional-ECM have the therapeutic capability to motivate canonically healing cells toward improved behavior; enhancing our ability to develop effective therapeutics.
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Affiliation(s)
- Juan Paredes
- Nancy E. and Peter C. Meinig School of Biomedical Engineering, Cornell University, Ithaca, NY, USA
| | - Jason C Marvin
- Nancy E. and Peter C. Meinig School of Biomedical Engineering, Cornell University, Ithaca, NY, USA
| | - Brenna Vaughn
- Nancy E. and Peter C. Meinig School of Biomedical Engineering, Cornell University, Ithaca, NY, USA
| | - Nelly Andarawis-Puri
- Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY, USA.,Hospital for Special Surgery, New York, NY, USA
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29
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Huang Y, Kyriakides TR. The role of extracellular matrix in the pathophysiology of diabetic wounds. Matrix Biol Plus 2020; 6-7:100037. [PMID: 33543031 PMCID: PMC7852307 DOI: 10.1016/j.mbplus.2020.100037] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Revised: 04/13/2020] [Accepted: 04/14/2020] [Indexed: 12/29/2022] Open
Abstract
Impaired healing leading to the formation of ulcerated wounds is a critical concern in patients with diabetes. Abnormalities in extracellular matrix (ECM) production and remodeling contribute to tissue dysfunction and delayed healing. Specifically, diabetes-induced changes in the expression and/or activity of structural proteins, ECM-modifying enzymes, proteoglycans, and matricellular proteins have been reported. In this review, we provide a summary of the key ECM molecules and associated changes in skin and diabetic wounds. Such information should allow for new insights in the understanding of impaired wound healing and lead to the development of ECM-based therapeutic strategies.
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Affiliation(s)
- Yaqing Huang
- Vascular Biology and Therapeutics Program, Yale University, New Haven, CT 06519, USA.,Department of Pathology, Yale University, New Haven, CT 06519, USA
| | - Themis R Kyriakides
- Vascular Biology and Therapeutics Program, Yale University, New Haven, CT 06519, USA.,Department of Pathology, Yale University, New Haven, CT 06519, USA.,Department of Biomedical Engineering, Yale University, New Haven, CT 06519, USA
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30
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Wang D, Pun CCM, Huang S, Tang TCM, Ho KKW, Rothrauff BB, Yung PSH, Blocki AM, Ker EDF, Tuan RS. Tendon-derived extracellular matrix induces mesenchymal stem cell tenogenesis via an integrin/transforming growth factor-β crosstalk-mediated mechanism. FASEB J 2020; 34:8172-8186. [PMID: 32301551 DOI: 10.1096/fj.201902377rr] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2019] [Revised: 04/01/2020] [Accepted: 04/02/2020] [Indexed: 12/26/2022]
Abstract
Treatment of tendon injuries is challenging. To develop means to augment tendon regeneration, we have previously prepared a soluble, low immunogenic (DNA-free), tendon extracellular matrix fraction (tECM) by urea extraction of juvenile bovine tendons, which is capable of enhancing transforming growth factor-β (TGF-β) mediated tenogenesis in human adipose-derived stem cells (hASCs). Here, we aimed to elucidate the mechanism of tECM-driven hASC tenogenic differentiation in vitro, focusing on the integrin and TGF-β/SMAD pathways. Our results showed that tECM promoted hASC proliferation and tenogenic differentiation in vitro based on tenogenesis-associated markers. tECM also induced higher expression of several integrin subunits and TGF-β receptors, and nuclear translocation of p-SMAD2 in hASCs. Pharmacological inhibition of integrin-ECM binding, focal adhesion kinase (FAK) signaling, or TGF-β signaling independently led to compromised pro-tenogenic effects of tECM and actin fiber polymerization. Additionally, integrin blockade inhibited tECM-driven TGFBR2 expression, while inhibiting TGF-β signaling decreased tECM-mediated expression of integrin α1, α2, and β1 in hASCs. Together, these findings suggest that the strong pro-tenogenic bioactivity of tECM is regulated via integrin/TGF-β signaling crosstalk. Understanding how integrins interact with signaling by TGF-β and/or other growth factors (GFs) within the tendon ECM microenvironment will provide a rational basis for an ECM-based approach for tendon repair.
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Affiliation(s)
- Dan Wang
- Institute for Tissue Engineering and Regenerative Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China.,School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Charmaine C M Pun
- Institute for Tissue Engineering and Regenerative Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China.,School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Shuting Huang
- Institute for Tissue Engineering and Regenerative Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China.,School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Thomas C M Tang
- Institute for Tissue Engineering and Regenerative Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China.,School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Kevin K W Ho
- Department of Orthopaedics and Traumatology, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Benjamin B Rothrauff
- Center for Cellular and Molecular Engineering, School of Medicine, University of Pittsburgh, Pittsburgh, PA, USA
| | - Patrick S H Yung
- Institute for Tissue Engineering and Regenerative Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China.,Department of Orthopaedics and Traumatology, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Anna M Blocki
- Institute for Tissue Engineering and Regenerative Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China.,School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Elmer D F Ker
- Institute for Tissue Engineering and Regenerative Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China.,School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Rocky S Tuan
- Institute for Tissue Engineering and Regenerative Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China.,School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China.,Center for Cellular and Molecular Engineering, School of Medicine, University of Pittsburgh, Pittsburgh, PA, USA.,Department of Orthopaedic Surgery, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA.,Department of Bioengineering, Swanson School of Engineering, University of Pittsburgh, Pittsburgh, PA, USA
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31
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Gögele C, Hahn J, Elschner C, Breier A, Schröpfer M, Prade I, Meyer M, Schulze-Tanzil G. Enhanced Growth of Lapine Anterior Cruciate Ligament-Derived Fibroblasts on Scaffolds Embroidered from Poly(l-lactide- co-ε-caprolactone) and Polylactic Acid Threads Functionalized by Fluorination and Hexamethylene Diisocyanate Cross-Linked Collagen Foams. Int J Mol Sci 2020; 21:E1132. [PMID: 32046263 PMCID: PMC7037627 DOI: 10.3390/ijms21031132] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Revised: 01/26/2020] [Accepted: 02/02/2020] [Indexed: 11/24/2022] Open
Abstract
Reconstruction of ruptured anterior cruciate ligaments (ACLs) is limited by the availability and donor site morbidity of autografts. Hence, a tissue engineered graft could present an alternative in the future. This study was undertaken to determine the performance of lapine (L) ACL-derived fibroblasts on embroidered poly(l-lactide-co-ε-caprolactone) (P(LA-CL)) and polylactic acid (PLA) scaffolds in regard to a tissue engineering approach for ACL reconstruction. Surface modifications of P(LA-CL)/PLA by gas-phase fluorination and cross-linking of a collagen foam using either ethylcarbodiimide (EDC) or hexamethylene diisocyanate (HMDI) were tested regarding their influence on cell adhesion, growth and gene expression. The experiments were performed using embroidered P(LA-CL)/PLA scaffolds that were seeded dynamically or statically with LACL-derived fibroblasts. Scaffold cytocompatibility, cell survival, numbers, metabolic activity, ultrastructure and sulfated glycosaminoglycan (sGAG) synthesis were evaluated. Quantitative real-time polymerase chain reaction (QPCR) revealed gene expression of collagen type I (COL1A1), decorin (DCN), tenascin C (TNC), Mohawk (MKX) and tenomodulin (TNMD). All tested scaffolds were highly cytocompatible. A significantly higher cellularity and larger scaffold surface areas colonized by cells were detected in HMDI cross-linked and fluorinated scaffolds compared to those cross-linked with EDC or without any functionalization. By contrast, sGAG synthesis was higher in controls. Despite the fact that the significance level was not reached, gene expressions of ligament extracellular matrix components and differentiation markers were generally higher in fluorinated scaffolds with cross-linked collagen foams. LACL-derived fibroblasts maintained their differentiated phenotype on fluorinated scaffolds supplemented with a HMDI cross-linked collagen foam, making them a promising tool for ACL tissue engineering.
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Affiliation(s)
- Clemens Gögele
- Institute of Anatomy and Cell Biology, Paracelsus Medical University, Nuremberg and Salzburg, Prof. Ernst Nathan Str. 1, 90419 Nuremberg, Germany;
- Department of Biosciences, Paris Lodron University of Salzburg, Hellbrunnerstr. 34, 5020 Salzburg, Austria
| | - Judith Hahn
- Leibniz-Institut für Polymerforschung Dresden e. V. (IPF), Dresden, Hohe Straße 6, 01069 Dresden, Germany; (J.H.); (C.E.); (A.B.)
| | - Cindy Elschner
- Leibniz-Institut für Polymerforschung Dresden e. V. (IPF), Dresden, Hohe Straße 6, 01069 Dresden, Germany; (J.H.); (C.E.); (A.B.)
| | - Annette Breier
- Leibniz-Institut für Polymerforschung Dresden e. V. (IPF), Dresden, Hohe Straße 6, 01069 Dresden, Germany; (J.H.); (C.E.); (A.B.)
| | - Michaela Schröpfer
- Forschungsinstitut für Leder und Kunststoffbahnen (FILK), Meißner Ring 1-5, 09599 Freiberg, Germany; (M.S.); (I.P.); (M.M.)
| | - Ina Prade
- Forschungsinstitut für Leder und Kunststoffbahnen (FILK), Meißner Ring 1-5, 09599 Freiberg, Germany; (M.S.); (I.P.); (M.M.)
| | - Michael Meyer
- Forschungsinstitut für Leder und Kunststoffbahnen (FILK), Meißner Ring 1-5, 09599 Freiberg, Germany; (M.S.); (I.P.); (M.M.)
| | - Gundula Schulze-Tanzil
- Institute of Anatomy and Cell Biology, Paracelsus Medical University, Nuremberg and Salzburg, Prof. Ernst Nathan Str. 1, 90419 Nuremberg, Germany;
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32
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Abstract
Tendons link muscle to bone and transfer forces necessary for normal movement. Tendon injuries can be debilitating and their intrinsic healing potential is limited. These challenges have motivated the development of model systems to study the factors that regulate tendon formation and tendon injury. Recent advances in understanding of embryonic and postnatal tendon formation have inspired approaches that aimed to mimic key aspects of tendon development. Model systems have also been developed to explore factors that regulate tendon injury and healing. We highlight current model systems that explore developmentally inspired cellular, mechanical, and biochemical factors in tendon formation and tenogenic stem cell differentiation. Next, we discuss in vivo, in vitro, ex vivo, and computational models of tendon injury that examine how mechanical loading and biochemical factors contribute to tendon pathologies and healing. These tendon development and injury models show promise for identifying the factors guiding tendon formation and tendon pathologies, and will ultimately improve regenerative tissue engineering strategies and clinical outcomes.
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Affiliation(s)
- Sophia K Theodossiou
- Biological Engineering, University of Idaho, 875 Perimeter Dr. MS 0904, Moscow, ID 83844, USA
| | - Nathan R Schiele
- Biological Engineering, University of Idaho, 875 Perimeter Dr. MS 0904, Moscow, ID 83844, USA
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Li S, Liu D, Fu Y, Zhang C, Tong H, Li S, Yan Y. Podocan Promotes Differentiation of Bovine Skeletal Muscle Satellite Cells by Regulating the Wnt4-β-Catenin Signaling Pathway. Front Physiol 2019; 10:1010. [PMID: 31447699 PMCID: PMC6692459 DOI: 10.3389/fphys.2019.01010] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2019] [Accepted: 07/22/2019] [Indexed: 02/03/2023] Open
Abstract
Background Small leucine-rich repeat proteins (SLRPs) are highly effective and selective modulators of cell proliferation and differentiation. Podocan is a newly discovered member of the SLRP family. Its potential roles in the differentiation of bovine muscle-derived satellite cells (MDSCs) and its underlying functional mechanism remain unclear. Our study aimed to characterize the function of the podocan gene in the differentiation of bovine MDSCs and to clarify the molecular mechanism by which podocan functions in order to contribute to a better understanding of the molecular mechanism by which extracellular matrix promotes bovine MDSC differentiation and provide a theoretical basis for the improvement of beef quality. Methods Bovine MDSCs were transfected with vectors to overexpress or inhibit podocan, and podocan protein was added to differentiation culture medium. qRT-PCR, western blotting, and immunofluorescence were performed to investigate the effects of podocan on MDSC differentiation. Confocal microscopy and western blotting were used to assess the nuclear translocation and expression of β-catenin. An inhibitor and activator of β-catenin were used to assess the effects of the Wnt/β-catenin signaling pathway on MDSC differentiation. We inhibited β-catenin while overexpressing podocan in MDSCs. Then, we performed mass spectrometry to identify which proteins interact with podocan to regulate the Wnt/β-catenin signaling pathway. Finally, we confirmed the relationship between podocan and Wnt4 by co-immunoprecipitation and western blotting. Results Podocan protein expression increased significantly during bovine MDSC differentiation. Differentiation of bovine MDSC was promoted and suppressed by podocan overexpression or inhibition, respectively. Podocan was also shown to modulate the Wnt/β-catenin signaling pathway. Treatment of bovine MDSCs with β-catenin inhibitor and activator showed that the Wnt/β-catenin pathway is involved in bovine MDSC differentiation. Furthermore, the effect of podocan on bovine MDSC differentiation was suppressed when this pathway was inhibited. We also found that podocan interacts with Wnt4. When Wnt4 was inhibited, podocan-induced promotion of bovine MDSC differentiation was attenuated through Wnt/β-catenin signaling. Conclusion Podocan regulates Wnt/β-catenin through Wnt4 to promote bovine MDSC differentiation.
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Affiliation(s)
- Shuang Li
- The Laboratory of Cell and Development, Northeast Agricultural University, Harbin, China
| | - Dan Liu
- The Laboratory of Cell and Development, Northeast Agricultural University, Harbin, China
| | - Yuying Fu
- The Laboratory of Cell and Development, Northeast Agricultural University, Harbin, China
| | - Chunyu Zhang
- The Laboratory of Cell and Development, Northeast Agricultural University, Harbin, China
| | - Huili Tong
- The Laboratory of Cell and Development, Northeast Agricultural University, Harbin, China
| | - Shufeng Li
- The Laboratory of Cell and Development, Northeast Agricultural University, Harbin, China
| | - Yunqin Yan
- The Laboratory of Cell and Development, Northeast Agricultural University, Harbin, China
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Freedman BR, Rodriguez AB, Hillin CD, Weiss SN, Han B, Han L, Soslowsky LJ. Tendon healing affects the multiscale mechanical, structural and compositional response of tendon to quasi-static tensile loading. J R Soc Interface 2019; 15:rsif.2017.0880. [PMID: 29467258 DOI: 10.1098/rsif.2017.0880] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2017] [Accepted: 01/29/2018] [Indexed: 12/20/2022] Open
Abstract
Tendon experiences a variety of multiscale changes to its extracellular matrix during mechanical loading at the fascicle, fibre and fibril levels. For example, tensile loading of tendon increases its stiffness, with organization of collagen fibres, and increases cell strain in the direction of loading. Although applied macroscale strains correlate to cell and nuclear strains in uninjured tendon, the multiscale response during tendon healing remains unknown and may affect cell mechanosensing and response. Therefore, this study evaluated multiscale structure-function mechanisms in response to quasi-static tensile loading in uninjured and healing tendons. We found that tendon healing affected the macroscale mechanical and structural response to mechanical loading, evidenced by decreases in strain stiffening and collagen fibre realignment. At the micro- and nanoscales, healing resulted in increased collagen fibre disorganization, nuclear disorganization, decreased change in nuclear aspect ratio with loading, and decreased indentation modulus compared to uninjured tendons. Taken together, this work supports a new concept of nuclear strain transfer attenuation during tendon healing and identifies several multiscale properties that may contribute. Our work also provides benchmarks for the biomechanical microenvironments that tendon cells may experience following cell delivery therapies.
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Affiliation(s)
- Benjamin R Freedman
- McKay Orthopedic Research Laboratory, University of Pennsylvania, 110 Stemmler Hall, 3450 Hamilton Walk, Philadelphia, PA 19104-6081, USA
| | - Ashley B Rodriguez
- McKay Orthopedic Research Laboratory, University of Pennsylvania, 110 Stemmler Hall, 3450 Hamilton Walk, Philadelphia, PA 19104-6081, USA
| | - Cody D Hillin
- McKay Orthopedic Research Laboratory, University of Pennsylvania, 110 Stemmler Hall, 3450 Hamilton Walk, Philadelphia, PA 19104-6081, USA
| | - Stephanie N Weiss
- McKay Orthopedic Research Laboratory, University of Pennsylvania, 110 Stemmler Hall, 3450 Hamilton Walk, Philadelphia, PA 19104-6081, USA
| | - Biao Han
- Department of Biomedical Engineering, Drexel University, Philadelphia, PA, USA
| | - Lin Han
- Department of Biomedical Engineering, Drexel University, Philadelphia, PA, USA
| | - Louis J Soslowsky
- McKay Orthopedic Research Laboratory, University of Pennsylvania, 110 Stemmler Hall, 3450 Hamilton Walk, Philadelphia, PA 19104-6081, USA
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Rajpar I, Barrett JG. Optimizing growth factor induction of tenogenesis in three-dimensional culture of mesenchymal stem cells. J Tissue Eng 2019; 10:2041731419848776. [PMID: 31205672 PMCID: PMC6535701 DOI: 10.1177/2041731419848776] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Accepted: 04/16/2019] [Indexed: 12/17/2022] Open
Abstract
Adult tissue stem cells have shown promise for the treatment of debilitating tendon injuries. However, few comparisons of stem cells from different tissue sources have been made to determine the optimum stem cell source for treating tendon. Moreover, it is likely that the application of tenogenic growth factors will improve tendon stem cell treatments further, and a comprehensive comparison of a number of growth factors is needed. Thus far, different types of stem cells cannot be evaluated in a high-throughput manner. To this end, we have developed an approach to culture mesenchymal stem cells isolated from bone marrow in collagen type I hydrogels with tenogenic growth factors using economical, commercially available supplies. To optimize growth factors for this assay, FGF-2, TGF-β1, IGF-1, and/or BMP-12 were tested singly and in novel combinations of (1) BMP-12 and IGF-1, (2) TGF-β1 and IGF-1, and/or (3) BMP-12 and FGF-2 over 10 days. Our data suggest that BMP-12 supplementation alone results in the strongest expression of tendon marker genes, controlled contractility of constructs, a higher degree of cell alignment, and tendon-like tissue morphology. This easy-to-use benchtop assay can be used to screen novel sources of stem cells and cell lines for tissue engineering and tendon healing applications.
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Affiliation(s)
- Ibtesam Rajpar
- Department of Large Animal Clinical Sciences, Marion duPont Scott Equine Medical Center, Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Leesburg, VA, USA
| | - Jennifer G Barrett
- Department of Large Animal Clinical Sciences, Marion duPont Scott Equine Medical Center, Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Leesburg, VA, USA
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36
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Bayesian inference of constitutive model parameters from uncertain uniaxial experiments on murine tendons. J Mech Behav Biomed Mater 2019; 96:285-300. [PMID: 31078970 DOI: 10.1016/j.jmbbm.2019.04.037] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Revised: 03/20/2019] [Accepted: 04/18/2019] [Indexed: 01/25/2023]
Abstract
Constitutive models for biological tissue are typically formulated as a mixture of constituents and the overall response is then assembled by superposition or compatibility. This ensures the stress response of the biological tissue to be in the range of a given constitutive relationship, guaranteeing that at least one parameter combination exists so that an experimental response can be sufficiently well captured. Another, perhaps more challenging, problem is to use constitutive models as a proxy to infer the structure/function of a biological tissue from experiments. In other words, we determine the optimal set of parameters by solving an inverse problem and use these parameters to infer the integrity of the tissue constituents. In previous studies, we focused on the mechanical stress-stretch response of the murine patellar tendon at various age and healing timepoints and solved the inverse problem using three constitutive models, i.e., the Freed-Rajagopal, Gasser-Ogden-Holzapfel and Shearer in order of increasing microstructural detail. Herein, we extend this work by adopting a Bayesian perspective on parameter estimation and implement the constitutive relations in the tulip library for uncertainty analysis, critically analyzing parameter marginals, correlations, identifiability and sensitivity. Our results show the importance of investigating the variability of parameter estimates and that results from optimization may be misleading, particularly for models with many parameters inferred from limited experimental evidence. In our study, we show that different age and healing conditions do not correspond to statistically significant separation among the Gasser-Ogden-Holzapfel and Shearer model parameters, while the phenomenological Freed-Rajagopal model is instead characterized by better indentifiability and parameter learning. Use of the complete experimental observations rather than averaged stress-stretch responses appears to positively constrain inference and results appear to be invariant with respect to the scaling of the experimental uncertainty.
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37
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Sachs NJ, Hampton AR, Foster KK, Pechanec MY, Henderson JD, King AJ, Mienaltowski MJ. The effects of an alternative diet regimen with natural methionine ingredients on white striping breast myopathy in broiler chickens. Poult Sci 2019; 98:413-421. [DOI: 10.3382/ps/pey327] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2017] [Accepted: 07/03/2018] [Indexed: 01/08/2023] Open
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38
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Bazyler CD, Mizuguchi S, Zourdos MC, Sato K, Kavanaugh AA, DeWeese BH, Breuel KF, Stone MH. Characteristics of a National Level Female Weightlifter Peaking for Competition: A Case Study. J Strength Cond Res 2018; 32:3029-3038. [DOI: 10.1519/jsc.0000000000002379] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Caleb D Bazyler
- Department of Sport, Exercise, Recreation, and Kinesiology, Center of Excellence for Sport Science and Coach Education, East Tennessee State University, Johnson City, Tennessee
| | - Satoshi Mizuguchi
- Department of Sport, Exercise, Recreation, and Kinesiology, Center of Excellence for Sport Science and Coach Education, East Tennessee State University, Johnson City, Tennessee
| | - Michael C Zourdos
- Department of Exercise Science and Health Promotion, Muscle Physiology Laboratory, Florida Atlantic University, Boca Raton, Florida
| | - Kimitake Sato
- Department of Sport, Exercise, Recreation, and Kinesiology, Center of Excellence for Sport Science and Coach Education, East Tennessee State University, Johnson City, Tennessee
| | - Ashley A Kavanaugh
- Department of Sport, Exercise, Recreation, and Kinesiology, Center of Excellence for Sport Science and Coach Education, East Tennessee State University, Johnson City, Tennessee
| | - Brad H DeWeese
- Department of Sport, Exercise, Recreation, and Kinesiology, Center of Excellence for Sport Science and Coach Education, East Tennessee State University, Johnson City, Tennessee
| | - Kevin F Breuel
- Department of Obstetrics and Gynecology, East Tennessee Reproductive Endocrinology Laboratory, East Tennessee State University, Johnson City, Tennessee
| | - Michael H Stone
- Department of Sport, Exercise, Recreation, and Kinesiology, Center of Excellence for Sport Science and Coach Education, East Tennessee State University, Johnson City, Tennessee
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Marques PP, Vieira CP, de Oliveira LP, Pimentel ER, Guerra FDR. Chronical treatment with sildenafil causes Achilles tendinopathy in rats. Life Sci 2018; 212:87-92. [PMID: 30267787 DOI: 10.1016/j.lfs.2018.09.048] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2018] [Revised: 09/10/2018] [Accepted: 09/25/2018] [Indexed: 01/05/2023]
Abstract
AIMS The primary goal was to assess the effects of chronic sildenafil treatment over the Achilles tendons in rats. MAIN METHODS Animals were divided into two groups, control and sildenafil administration (n = 5). After 60 days, the tendons were subject to biochemical and image analysis to compare tendons between the groups: collagen I and decorin content, polarisation microscopy and birefringence analysis, and tissue zymography. KEY FINDINGS The animals exposed to sildenafil presented a much less organised tendon matrix, with reduced collagen I and non-collagenous protein content and a much higher decorin content. SIGNIFICANCE The results observed in the animals can be characterised as tendinopathy, a condition not yet described as a sildenafil side effect.
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Affiliation(s)
- Petrus Pires Marques
- Department of Medicine, José do Rosário Vellano University - Unifenas, 37130-000 Alfenas, MG, Brazil.
| | - Cristiano Pedrozo Vieira
- Department of Pharmacology, Faculty of Medical Sciences, State University of Campinas - UNICAMP, 13083-970 Campinas, SP, Brazil
| | - Letícia Prado de Oliveira
- Department of Anatomy, Cell Biology and Physiology and Biophysics, Institute of Biology, CP 6109, University of Campinas - UNICAMP, 13083-970 Campinas, SP, Brazil
| | - Edson Rosa Pimentel
- Department of Anatomy, Cell Biology and Physiology and Biophysics, Institute of Biology, CP 6109, University of Campinas - UNICAMP, 13083-970 Campinas, SP, Brazil
| | - Flávia Da Ré Guerra
- Department of Anatomy, Institute of Biomedical Science, Federal University of Alfenas - UNIFAL-MG, 37130-000 Alfenas, MG, Brazil
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40
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Delgado Caceres M, Pfeifer CG, Docheva D. Understanding Tendons: Lessons from Transgenic Mouse Models. Stem Cells Dev 2018; 27:1161-1174. [PMID: 29978741 PMCID: PMC6121181 DOI: 10.1089/scd.2018.0121] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Accepted: 07/05/2018] [Indexed: 12/26/2022] Open
Abstract
Tendons and ligaments are connective tissues that have been comparatively less studied than muscle and cartilage/bone, even though they are crucial for proper function of the musculoskeletal system. In tendon biology, considerable progress has been made in identifying tendon-specific genes (Scleraxis, Mohawk, and Tenomodulin) in the past decade. However, besides tendon function and the knowledge of a small number of important players in tendon biology, neither the ontogeny of the tenogenic lineage nor signaling cascades have been fully understood. This results in major drawbacks in treatment and repair options following tendon degeneration. In this review, we have systematically evaluated publications describing tendon-related genes, which were studied in depth and characterized by using knockout technologies and the subsequently generated transgenic mouse models (Tg) (knockout mice, KO). We report in a tabular manner, that from a total of 24 tendon-related genes, in 22 of the respective knockout mouse models, phenotypic changes were detected. Additionally, in some of the models it was described at which developmental stages these changes appeared and progressed. To summarize, only loss of Scleraxis and TGFβ signaling led to severe tendon developmental phenotypes, while mice deficient for various proteoglycans, Mohawk, EGR1 and 2, and Tenomodulin presented mild phenotypes. These data suggest that the tendon developmental system is well organized, orchestrated, and backed up; this is even more evident among the members of the proteoglycan family, where the compensatory effects are much clearer. In future, it will be of great importance to discover additional master tendon transcription factors and the genes that play crucial roles in tendon development. This would improve our understanding of the genetic makeup of tendons, and will increase the chances of generating tendon-specific drugs to advance overall treatment strategies.
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Affiliation(s)
- Manuel Delgado Caceres
- Experimental Trauma Surgery, Department of Trauma Surgery, University Regensburg Medical Centre, Regensburg, Germany
| | - Christian G. Pfeifer
- Experimental Trauma Surgery, Department of Trauma Surgery, University Regensburg Medical Centre, Regensburg, Germany
- Department of Trauma Surgery, University Regensburg Medical Centre, Regensburg, Germany
| | - Denitsa Docheva
- Experimental Trauma Surgery, Department of Trauma Surgery, University Regensburg Medical Centre, Regensburg, Germany
- Department of Medical Biology, Medical University-Plovdiv, Plovdiv, Bulgaria
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41
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de Aro AA, Carneiro GD, Teodoro LFR, da Veiga FC, Ferrucci DL, Simões GF, Simões PW, Alvares LE, de Oliveira ALR, Vicente CP, Gomes CP, Pesquero JB, Esquisatto MAM, de Campos Vidal B, Pimentel ER. Injured Achilles Tendons Treated with Adipose-Derived Stem Cells Transplantation and GDF-5. Cells 2018; 7:cells7090127. [PMID: 30200326 PMCID: PMC6162699 DOI: 10.3390/cells7090127] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Revised: 08/17/2018] [Accepted: 08/23/2018] [Indexed: 12/22/2022] Open
Abstract
Tendon injuries represent a clinical challenge in regenerative medicine because their natural repair process is complex and inefficient. The high incidence of tendon injuries is frequently associated with sports practice, aging, tendinopathies, hypertension, diabetes mellitus, and the use of corticosteroids. The growing interest of scientists in using adipose-derived mesenchymal stem cells (ADMSC) in repair processes seems to be mostly due to their paracrine and immunomodulatory effects in stimulating specific cellular events. ADMSC activity can be influenced by GDF-5, which has been successfully used to drive tenogenic differentiation of ADMSC in vitro. Thus, we hypothesized that the application of ADMSC in isolation or in association with GDF-5 could improve Achilles tendon repair through the regulation of important remodeling genes expression. Lewis rats had tendons distributed in four groups: Transected (T), transected and treated with ADMSC (ASC) or GDF-5 (GDF5), or with both (ASC+GDF5). In the characterization of cells before application, ADMSC expressed the positive surface markers, CD90 (90%) and CD105 (95%), and the negative marker, CD45 (7%). ADMSC were also differentiated in chondrocytes, osteoblast, and adipocytes. On the 14th day after the tendon injury, GFP-ADMSC were observed in the transected region of tendons in the ASC and ASC+GDF5 groups, and exhibited and/or stimulated a similar genes expression profile when compared to the in vitro assay. ADMSC up-regulated Lox, Dcn, and Tgfb1 genes expression in comparison to T and ASC+GDF5 groups, which contributed to a lower proteoglycans arrangement, and to a higher collagen fiber organization and tendon biomechanics in the ASC group. The application of ADMSC in association with GDF-5 down-regulated Dcn, Gdf5, Lox, Tgfb1, Mmp2, and Timp2 genes expression, which contributed to a lower hydroxyproline concentration, lower collagen fiber organization, and to an improvement of the rats’ gait 24 h after the injury. In conclusion, although the literature describes the benefic effect of GDF-5 for the tendon healing process, our results show that its application, isolated or associated with ADMSC, cannot improve the repair process of partial transected tendons, indicating the higher effectiveness of the application of ADMSC in injured Achilles tendons. Our results show that the application of ADMSC in injured Achilles tendons was more effective in relation to its association with GDF-5.
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Affiliation(s)
- Andrea Aparecida de Aro
- Department of Structural and Functional Biology, Institute of Biology, State University of Campinas⁻UNICAMP, Charles Darwin, s/n, CP 6109, 13083-970 Campinas, SP, Brazil.
- Biomedical Sciences Graduate Program, Herminio Ometto University Center⁻UNIARARAS, 13607-339 Araras, SP, Brazil.
| | - Giane Daniela Carneiro
- Department of Structural and Functional Biology, Institute of Biology, State University of Campinas⁻UNICAMP, Charles Darwin, s/n, CP 6109, 13083-970 Campinas, SP, Brazil.
| | - Luis Felipe R Teodoro
- Department of Structural and Functional Biology, Institute of Biology, State University of Campinas⁻UNICAMP, Charles Darwin, s/n, CP 6109, 13083-970 Campinas, SP, Brazil.
| | - Fernanda Cristina da Veiga
- Department of Biochemistry and Tissue Biology, Institute of Biology, State University of Campinas⁻UNICAMP, Charles Darwin, s/n, CP 6109, 13083-970 Campinas, SP, Brazil.
| | - Danilo Lopes Ferrucci
- Department of Structural and Functional Biology, Institute of Biology, State University of Campinas⁻UNICAMP, Charles Darwin, s/n, CP 6109, 13083-970 Campinas, SP, Brazil.
| | - Gustavo Ferreira Simões
- Department of Structural and Functional Biology, Institute of Biology, State University of Campinas⁻UNICAMP, Charles Darwin, s/n, CP 6109, 13083-970 Campinas, SP, Brazil.
| | - Priscyla Waleska Simões
- Engineering, Modeling and Applied Social Sciences Center (CECS), Biomedical Engineering Graduate Program (PPGEBM), Universidade Federal do ABC (UFABC), Alameda da Universidade s/n, 09606-045 São Bernardo do Campo, SP, Brazil.
| | - Lúcia Elvira Alvares
- Department of Biochemistry and Tissue Biology, Institute of Biology, State University of Campinas⁻UNICAMP, Charles Darwin, s/n, CP 6109, 13083-970 Campinas, SP, Brazil.
| | - Alexandre Leite R de Oliveira
- Department of Structural and Functional Biology, Institute of Biology, State University of Campinas⁻UNICAMP, Charles Darwin, s/n, CP 6109, 13083-970 Campinas, SP, Brazil.
| | - Cristina Pontes Vicente
- Department of Structural and Functional Biology, Institute of Biology, State University of Campinas⁻UNICAMP, Charles Darwin, s/n, CP 6109, 13083-970 Campinas, SP, Brazil.
| | - Caio Perez Gomes
- Department of Biophysics, Federal University of Sao Paulo⁻Unifesp, Pedro de Toledo, 699, 04039-032 Sao Paulo, SP, Brazil.
| | - João Bosco Pesquero
- Department of Biophysics, Federal University of Sao Paulo⁻Unifesp, Pedro de Toledo, 699, 04039-032 Sao Paulo, SP, Brazil.
| | - Marcelo Augusto M Esquisatto
- Biomedical Sciences Graduate Program, Herminio Ometto University Center⁻UNIARARAS, 13607-339 Araras, SP, Brazil.
| | - Benedicto de Campos Vidal
- Department of Structural and Functional Biology, Institute of Biology, State University of Campinas⁻UNICAMP, Charles Darwin, s/n, CP 6109, 13083-970 Campinas, SP, Brazil.
| | - Edson Rosa Pimentel
- Department of Structural and Functional Biology, Institute of Biology, State University of Campinas⁻UNICAMP, Charles Darwin, s/n, CP 6109, 13083-970 Campinas, SP, Brazil.
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Freedman BR, Rodriguez AB, Leiphart RJ, Newton JB, Ban E, Sarver JJ, Mauck RL, Shenoy VB, Soslowsky LJ. Dynamic Loading and Tendon Healing Affect Multiscale Tendon Properties and ECM Stress Transmission. Sci Rep 2018; 8:10854. [PMID: 30022076 PMCID: PMC6052000 DOI: 10.1038/s41598-018-29060-y] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2018] [Accepted: 06/26/2018] [Indexed: 12/15/2022] Open
Abstract
The extracellular matrix (ECM) is the primary biomechanical environment that interacts with tendon cells (tenocytes). Stresses applied via muscle contraction during skeletal movement transfer across structural hierarchies to the tenocyte nucleus in native uninjured tendons. Alterations to ECM structural and mechanical properties due to mechanical loading and tissue healing may affect this multiscale strain transfer and stress transmission through the ECM. This study explores the interface between dynamic loading and tendon healing across multiple length scales using living tendon explants. Results show that macroscale mechanical and structural properties are inferior following high magnitude dynamic loading (fatigue) in uninjured living tendon and that these effects propagate to the microscale. Although similar macroscale mechanical effects of dynamic loading are present in healing tendon compared to uninjured tendon, the microscale properties differed greatly during early healing. Regression analysis identified several variables (collagen and nuclear disorganization, cellularity, and F-actin) that directly predict nuclear deformation under loading. Finite element modeling predicted deficits in ECM stress transmission following fatigue loading and during healing. Together, this work identifies the multiscale response of tendon to dynamic loading and healing, and provides new insight into microenvironmental features that tenocytes may experience following injury and after cell delivery therapies.
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Affiliation(s)
- Benjamin R Freedman
- McKay Orthopedic Research Laboratory, University of Pennsylvania, Philadelphia, PA, USA.,Department of Bioengineering, School of Engineering and Applied Science, University of Pennsylvania, Philadelphia, PA, USA.,John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, USA.,Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA, USA
| | - Ashley B Rodriguez
- McKay Orthopedic Research Laboratory, University of Pennsylvania, Philadelphia, PA, USA
| | - Ryan J Leiphart
- McKay Orthopedic Research Laboratory, University of Pennsylvania, Philadelphia, PA, USA.,Department of Bioengineering, School of Engineering and Applied Science, University of Pennsylvania, Philadelphia, PA, USA
| | - Joseph B Newton
- McKay Orthopedic Research Laboratory, University of Pennsylvania, Philadelphia, PA, USA.,Department of Bioengineering, School of Engineering and Applied Science, University of Pennsylvania, Philadelphia, PA, USA
| | - Ehsan Ban
- Department of Materials Science and Engineering, School of Engineering and Applied Science, University of Pennsylvania, Philadelphia, PA, USA.,Center for Engineering Mechanobiology, University of Pennsylvania, Philadelphia, PA, USA
| | - Joseph J Sarver
- Department of Biomedical Engineering, Drexel University, Philadelphia, PA, USA
| | - Robert L Mauck
- McKay Orthopedic Research Laboratory, University of Pennsylvania, Philadelphia, PA, USA.,Department of Bioengineering, School of Engineering and Applied Science, University of Pennsylvania, Philadelphia, PA, USA
| | - Vivek B Shenoy
- Department of Materials Science and Engineering, School of Engineering and Applied Science, University of Pennsylvania, Philadelphia, PA, USA.,Center for Engineering Mechanobiology, University of Pennsylvania, Philadelphia, PA, USA
| | - Louis J Soslowsky
- McKay Orthopedic Research Laboratory, University of Pennsylvania, Philadelphia, PA, USA. .,Department of Bioengineering, School of Engineering and Applied Science, University of Pennsylvania, Philadelphia, PA, USA.
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Xu SY, He YB, Deng SY, Liu SY, Xu L, Ni GX. Intensity-dependent effect of treadmill running on rat Achilles tendon. Exp Ther Med 2018; 15:5377-5383. [PMID: 29805550 PMCID: PMC5958711 DOI: 10.3892/etm.2018.6084] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2015] [Accepted: 01/13/2017] [Indexed: 02/05/2023] Open
Abstract
It is understood that mechanical loading may affect tendon properties. However, how different mechanical loading conditions may affect tendons remains unknown. The present study aimed to investigate the effect of treadmill running at various intensities on rat Achilles tendon. A total of 18 male Wistar rats were randomly assigned to one of three groups: Control (CON), medium-intensity running (MIR), and high-intensity running (HIR). Following 8 weeks of treadmill running protocols, all Achilles tendons were harvested for histological observation and gene expression analysis. Significant morphological changes were observed with regular and large diameter collagen fibrils in the MIR group, whereas irregular and small diameter collagen fibrils were observed in the HIR group. Collagen type I was significantly upregulated in the MIR group compared with the CON group, and downregulated in the HIR group compared with the CON or MIR groups (P<0.05). However, collagen type III was significantly upregulated in the HIR group in comparison with the CON or MIR groups (P<0.05). Furthermore, the expression of matrix metallopeptidase-13 was significantly increased in the MIR and HIR groups compared with the CON group (P<0.05). The expression of tissue inhibitor of metalloproteinases-1 was increased in the MIR group compared with the CON group, but decreased in the HIR group compared with the CON and MIR groups (P<0.05). Additionally, decorin expression was significantly higher in the MIR group compared with the CON group, and significantly decreased in the HIR group compared with the CON or MIR groups (P<0.05). A converse pattern of changes in biglycan expression was identified among the three groups. Aggrecan expression was significantly higher in the HIR group compared with the CON or MIR groups (P<0.05). These findings indicated that moderate exercise may induce increased collagen synthesis and organize regular and large collagen fibers, thus benefiting the Achilles tendon. However, overuse during exercise may result in collagen degradation and disturbance, which predisposes individuals to injury.
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Affiliation(s)
- Shao-Yong Xu
- Department of Orthopaedics and Traumatology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - Yong-Bin He
- Department of Orthopaedics and Traumatology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - Song-Yun Deng
- Department of Orthopaedics and Traumatology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - Sheng-Yao Liu
- Department of Orthopaedics and Traumatology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - Lei Xu
- Department of Orthopaedics and Traumatology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - Guo-Xin Ni
- Department of Orthopaedics and Traumatology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
- Department of Rehabilitation Medicine, First Affiliated Hospital, Fujian Medical University, Fuzhou, Fujian 350005, P.R. China
- Correspondence to: Professor Guo-Xin Ni, Department of Orthopaedics and Traumatology, Nanfang Hospital, Southern Medical University, 1838 Guangzhou Avenue, Guangzhou, Guangdong 510515, P.R. China, E-mail:
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Sevivas N, Teixeira FG, Portugal R, Direito-Santos B, Espregueira-Mendes J, Oliveira FJ, Silva RF, Sousa N, Sow WT, Nguyen LTH, Ng KW, Salgado AJ. Mesenchymal Stem Cell Secretome Improves Tendon Cell Viability In Vitro and Tendon-Bone Healing In Vivo When a Tissue Engineering Strategy Is Used in a Rat Model of Chronic Massive Rotator Cuff Tear. Am J Sports Med 2018; 46:449-459. [PMID: 29053925 DOI: 10.1177/0363546517735850] [Citation(s) in RCA: 64] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
BACKGROUND Massive rotator cuff tears (MRCTs) represent a major clinical concern, especially when degeneration and chronicity are involved, which highly compromise healing capacity. PURPOSE To study the effect of the secretome of mesenchymal stem cells (MSCs) on tendon cells (TCs) followed by the combination of these activated TCs with an electrospun keratin-based scaffold to develop a tissue engineering strategy to improve tendon-bone interface (TBi) healing in a chronic MRCT rat model. STUDY DESIGN Controlled laboratory study. METHODS Human TCs (hTCs) cultured with the human MSCs (hMSCs) secretome (as conditioned media [CM]) were combined with keratin electrospun scaffolds and further implanted in a chronic MRCT rat model. Wistar-Han rats (N = 15) were randomly assigned to 1 of 3 groups: untreated lesion (MRCT group, n = 5), lesion treated with a scaffold only (scaffold-only group, n = 5), and lesion treated with a scaffold seeded with hTCs preconditioned with hMSCs-CM (STC_hMSC_CM group, n = 5). After sacrifice, 16 weeks after surgery, the rotator cuff TBi was harvested for histological analysis and biomechanical testing. RESULTS The hMSCs secretome increased hTCs viability and density in vitro. In vivo, a significant improvement of the tendon maturing score was observed in the STC_hMSC_CM group (mean ± standard error of the mean, 15.6 ± 1.08) compared with the MRCT group (11.0 ± 1.38; P < .05). Biomechanical tests revealed a significant increase in the total elongation to rupture (STC_hMSC_CM, 11.99 ± 3.30 mm; scaffold-only, 9.89 ± 3.47 mm; MRCT, 5.86 ± 3.16 mm; P < .05) as well as a lower stiffness (STC_hMSC_CM, 6.25 ± 1.74 N/mm; scaffold-only, 6.72 ± 1.28 N/mm; MRCT, 11.54 ± 2.99 N/mm; P < .01). CONCLUSION The results demonstrated that hMSCs-CM increased hTCs viability and density in vitro. Clear benefits also were observed when these primed cells were integrated into a tissue engineering strategy with an electrospun keratin scaffold, as evidenced by improved histological and biomechanical properties for the STC_hMSC_CM group compared with the MRCT group. CLINICAL RELEVANCE This work supports further investigation into the use of MSC secretome for priming TCs toward a more differentiated phenotype, and it promotes the tissue engineering strategy as a promising modality to help improve treatment outcomes for chronic MRCTs.
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Affiliation(s)
- Nuno Sevivas
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Campus de Gualtar, Braga, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal.,Orthopaedics Department, Hospital de Braga and Hospital Privado de Braga, Braga, Portugal.,Clínica Espregueira-Mendes, FIFA Medical Centre of Excellence, Estádio do Dragão, Porto, Portugal
| | - Fábio Gabriel Teixeira
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Campus de Gualtar, Braga, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | | | - Bruno Direito-Santos
- Orthopaedics Department, Hospital de Braga and Hospital Privado de Braga, Braga, Portugal
| | - João Espregueira-Mendes
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Campus de Gualtar, Braga, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal.,Clínica Espregueira-Mendes, FIFA Medical Centre of Excellence, Estádio do Dragão, Porto, Portugal.,3B's Research Group, Biomaterials, Biodegradables and Biomimetics, Department of Polymer Engineering, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Guimarães, Portugal
| | - Filipe J Oliveira
- CICECO, Department of Materials and Ceramic Engineering, University of Aveiro, Campus Universitário de Santiago, Aveiro, Portugal
| | - Rui F Silva
- CICECO, Department of Materials and Ceramic Engineering, University of Aveiro, Campus Universitário de Santiago, Aveiro, Portugal
| | - Nuno Sousa
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Campus de Gualtar, Braga, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Wan Ting Sow
- School of Materials Science and Engineering, Nanyang Technological University, Singapore
| | - Luong T H Nguyen
- School of Materials Science and Engineering, Nanyang Technological University, Singapore
| | - Kee Woei Ng
- School of Materials Science and Engineering, Nanyang Technological University, Singapore
| | - António J Salgado
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Campus de Gualtar, Braga, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal
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45
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Zhu D, Tapadia MD, Palispis W, Luu M, Wang W, Gupta R. Attenuation of Robust Glial Scar Formation Facilitates Functional Recovery in Animal Models of Chronic Nerve Compression Injury. J Bone Joint Surg Am 2017; 99:e132. [PMID: 29257018 DOI: 10.2106/jbjs.17.00396] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
BACKGROUND Late surgery for chronic nerve compression injuries usually improves sensation but rarely reverses motor atrophy. We hypothesized that a persistent glial scar after chronic nerve compression injury might account for poor motor recovery and that degradation of the glial scar as an adjunct to surgical decompression would improve functional recovery. METHODS A previously described model of chronic nerve compression injury was created in C57BL/6 mice and Sprague-Dawley rats, and the nerves were harvested early or late after electrophysiological confirmation of the injury. Western blot, polymerase chain reaction, and quantitative immunohistochemical analyses were performed to determine levels of chondroitin sulfate proteoglycans and extracellular matrix molecules. Subsets of mice were treated either with surgical decompression alone or with decompression coupled with intraepineurial injection of a low dose (0.1 μgμL) or a high dose (0.2 μg/μL) of chondroitinase ABC at 6 weeks after injury. RESULTS Aggrecan showed the greatest change in mRNA and protein levels at the early and late time points following creation of the chronic nerve compression injury. Quantitative immunohistochemical analysis revealed early aggrecan upregulation localized primarily to the endoneurium and late upregulation localized to the perineurium and epineurium (p < 0.0105). Quantitative immunohistochemical analysis for collagen IV, laminin-α2, and fibronectin also showed early upregulation with perineurial scarring. Quantitative immunohistochemical analysis and Western blot analysis for aggrecan demonstrated a marked increase in the endoneurium at the early time points and upregulation of expression in the epineurium and perineurium at the late time points. Decompression along with intraepineurial injection of high-dose chondroitinase ABC at 6 weeks after creation of the compression injury resulted in marked attenuation of decorin and aggrecan expression with functional improvement in nerve conduction velocity. CONCLUSIONS Significant upregulation of chondroitin sulfate proteoglycans and other extracellular matrix components contributes to the pathogenesis of compression neuropathies in murine models. The administration of chondroitinase ABC degrades these chondroitin sulfate proteoglycans and improves functional recovery after chronic nerve compression injury; thus, it can be considered as a possible therapeutic adjunct.
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Affiliation(s)
- Diana Zhu
- Peripheral Nerve Research Laboratory, Department of Orthopaedic Surgery, University of California, Irvine, Irvine, California
| | - Minal D Tapadia
- Peripheral Nerve Research Laboratory, Department of Orthopaedic Surgery, University of California, Irvine, Irvine, California
| | - Winnie Palispis
- Peripheral Nerve Research Laboratory, Department of Orthopaedic Surgery, University of California, Irvine, Irvine, California
| | - Michele Luu
- Peripheral Nerve Research Laboratory, Department of Orthopaedic Surgery, University of California, Irvine, Irvine, California
| | - Weiping Wang
- Peripheral Nerve Research Laboratory, Department of Orthopaedic Surgery, University of California, Irvine, Irvine, California
| | - Ranjan Gupta
- Peripheral Nerve Research Laboratory, Department of Orthopaedic Surgery, University of California, Irvine, Irvine, California
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46
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Evaluation of microstructurally motivated constitutive models to describe age-dependent tendon healing. Biomech Model Mechanobiol 2017; 17:793-814. [PMID: 29234987 PMCID: PMC5948310 DOI: 10.1007/s10237-017-0993-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Accepted: 11/30/2017] [Indexed: 12/27/2022]
Abstract
Tendon injuries are common to all ages. Injured tendons typically do not recover full functionality. The amount and organization of tendon constituents dictate their mechanical properties. The impact of changes in these constituents during (patho)physiologic processes (e.g., aging and healing) are not fully understood. Toward this end, microstructurally motivated strain energy functions (SEFs) offer insight into underlying mechanisms of age-dependent healing. Several SEFs have been adapted for tendon; however, most are phenomenological. Therefore, the aims of this study are: (1) evaluate the descriptive capability of SEFs in age-dependent murine patellar tendon healing and (2) identify a SEF for implementation in a growth and remodeling (G&R) model. To accomplish these aims, models were fitted to patellar tendon tensile data from multiple age groups and post-injury timepoints. Model sensitivity to parameters and the determinability of the parameters were assessed. A two-way analysis of variance was used to identify changes in parameters and the feasibility of implementing each model into a G&R model is discussed. The evaluated SEFs exhibited adequate descriptive capability. Parameter determinability and sensitivity analysis, however, highlighted the need for additional data to inform and validate the models to increase physiologic relevance and enable G&R model formulation to determine underlying mechanisms of age-dependent healing. This work, as a first, evaluated changes in tendon mechanical properties both as functions of age and injury in an age-dependent manner using microstructurally motivated models, highlights inherent dependencies between parameters of widely used hyperelastic models, and identified unique post-injury behavior by the aging group compared to the mature and aged groups.
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47
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Johnston JM, Connizzo BK, Shetye SS, Robinson KA, Huegel J, Rodriguez AB, Sun M, Adams SM, Birk DE, Soslowsky LJ. Collagen V haploinsufficiency in a murine model of classic Ehlers-Danlos syndrome is associated with deficient structural and mechanical healing in tendons. J Orthop Res 2017; 35:2707-2715. [PMID: 28387435 PMCID: PMC5632109 DOI: 10.1002/jor.23571] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/26/2016] [Accepted: 03/28/2017] [Indexed: 02/04/2023]
Abstract
Classic Ehlers-Danlos syndrome (EDS) patients suffer from connective tissue hyperelasticity, joint instability, skin hyperextensibility, tissue fragility, and poor wound healing due to heterozygous mutations in COL5a1 or COL5a2 genes. This study investigated the roles of collagen V in establishing structure and function in uninjured patellar tendons as well as in the injury response using a Col5a1+/- mouse, a model for classic EDS. These analyses were done comparing tendons from a classic EDS model (Col5a1+/- ) with wild-type controls. Tendons were subjected to mechanical testing, histological, and fibril analysis before injury as well as 3 and 6 weeks after injury. We found that Col5a1+/- tendons demonstrated diminished recovery of mechanical competency after injury as compared to normal wild-type tendons, which recovered their pre-injury values by 6 weeks post injury. Additionally, the Col5a1+/- tendons demonstrated altered fibril morphology and diameter distributions compared to the wild-type tendons. This study indicates that collagen V plays an important role in regulating collagen fibrillogenesis and the associated recovery of mechanical integrity in tendons after injury. In addition, the dysregulation with decreased collagen V expression in EDS is associated with a diminished injury response. The results presented herein have the potential to direct future targeted therapeutics for classic EDS patients. © 2017 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 35:2707-2715, 2017.
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Affiliation(s)
- Jessica M. Johnston
- University Laboratory Animal Resources, Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, Pennsylvania,McKay Orthopaedic Research Laboratory, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Brianne K. Connizzo
- McKay Orthopaedic Research Laboratory, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Snehal S. Shetye
- McKay Orthopaedic Research Laboratory, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Kelsey A. Robinson
- McKay Orthopaedic Research Laboratory, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Julianne Huegel
- McKay Orthopaedic Research Laboratory, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Ashley B. Rodriguez
- McKay Orthopaedic Research Laboratory, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Mei Sun
- Department of Molecular Pharmacology and Physiology, Morsani College of Medicine, University of South Florida, Tampa, Florida
| | - Sheila M. Adams
- Department of Molecular Pharmacology and Physiology, Morsani College of Medicine, University of South Florida, Tampa, Florida
| | - David E. Birk
- Department of Molecular Pharmacology and Physiology, Morsani College of Medicine, University of South Florida, Tampa, Florida
| | - Louis J. Soslowsky
- McKay Orthopaedic Research Laboratory, University of Pennsylvania, Philadelphia, Pennsylvania
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Liu Y, Xu J, Xu L, Wu T, Sun Y, Lee YW, Wang B, Chan HC, Jiang X, Zhang J, Li G. Cystic fibrosis transmembrane conductance regulator mediates tenogenic differentiation of tendon-derived stem cells and tendon repair: accelerating tendon injury healing by intervening in its downstream signaling. FASEB J 2017; 31:3800-3815. [PMID: 28495756 DOI: 10.1096/fj.201601181r] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2016] [Accepted: 04/24/2017] [Indexed: 01/09/2023]
Abstract
Tendons are a mechanosensitive tissue, which enables them to transmit to bone forces that are derived from muscle. Patients with tendon injuries, such as tendinopathy or tendon rupture, were often observed with matrix degeneration, and the healing of tendon injuries remains a challenge as a result of the limited understanding of tendon biology. Our study demonstrates that the stretch-mediated activation channel, cystic fibrosis transmembrane conductance regulator (CFTR), was up-regulated in tendon-derived stem cells (TDSCs) during tenogenic differentiation under mechanical stretching. Tendon tissues in CFTR-dysfunctional DF508 mice exhibited irregular cell arrangement, uneven fibril diameter distribution, weak mechanical properties, and less matrix formation in a tendon defect model. Moreover, both tendon tissues and TDSCs isolated from DF508 mice showed significantly decreased levels of tendon markers, such as scleraxis, tenomodulin, Col1A1 (collagen type I α 1 chain), and decorin Furthermore, by RNA sequencing analysis, we demonstrated that Wnt/β-catenin signaling was abnormally activated in TDSCs from DF508 mice, thereby further activating the pERK1/2 signaling pathway. Of most importance, we found that intervention in pERK1/2 signaling could promote tenogenic differentiation and tendon regeneration both in vitro and in vivo Taken together, our study demonstrates that CFTR plays an important role in tenogenic differentiation and tendon regeneration by inhibiting the β-catinin/pERK1/2 signaling pathway. The therapeutic strategy of intervening in the CFTR/β-catenin/pERK1/2 regulatory axis may be helpful for accelerating tendon injury healing, which has implications for tendon injury management.-Liu, Y., Xu, J., Xu, L., Wu, T., Sun, Y., Lee, Y.-W., Wang, B., Chan, H.-C., Jiang, X., Zhang, J., Li, G. Cystic fibrosis transmembrane conductance regulator mediates tenogenic differentiation of tendon-derived stem cells and tendon repair: accelerating tendon injury healing by intervening in its downstream signaling.
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Affiliation(s)
- Yang Liu
- Department of Orthopaedics and Traumatology, Faculty of Medicine, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong, Special Administrative Region, China
| | - Jia Xu
- Department of Orthopaedic Surgery, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Liangliang Xu
- Department of Orthopaedics and Traumatology, Faculty of Medicine, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong, Special Administrative Region, China.,Key Laboratory of Orthopaedics and Traumatology, The First Affiliated Hospital of Guangzhou University of Chinese Medicine, The First Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Tianyi Wu
- Department of Orthopaedics and Traumatology, Faculty of Medicine, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong, Special Administrative Region, China.,Department of Orthopaedic Surgery, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Yuxin Sun
- Department of Orthopaedics and Traumatology, Faculty of Medicine, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong, Special Administrative Region, China
| | - Yuk-Wai Lee
- Department of Orthopaedics and Traumatology, Faculty of Medicine, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong, Special Administrative Region, China
| | - Bin Wang
- Department of Orthopaedics and Traumatology, Faculty of Medicine, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong, Special Administrative Region, China
| | - Hsiao-Chang Chan
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, Special Administrative Region, China
| | - Xiaohua Jiang
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, Special Administrative Region, China
| | - Jinfang Zhang
- Department of Orthopaedics and Traumatology, Faculty of Medicine, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong, Special Administrative Region, China; .,Stem Cells and Regenerative Medicine Laboratory, Lui Che Woo Institute of Innovative Medicine, Li Ka Shing Institute of Health Sciences, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong, Special Administrative Region, China
| | - Gang Li
- Department of Orthopaedics and Traumatology, Faculty of Medicine, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong, Special Administrative Region, China; .,Stem Cells and Regenerative Medicine Laboratory, Lui Che Woo Institute of Innovative Medicine, Li Ka Shing Institute of Health Sciences, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong, Special Administrative Region, China.,Key Laboratory for Regenerative Medicine, Ministry of Education, School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, Special Administrative Region, China.,The Chinese University of Hong Kong-China Astronaut Research and Training Center Space Medicine Centre on Health Maintenance of Musculoskeletal System, Shenzhen Research Institute, The Chinese University of Hong Kong, Shenzhen, China
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49
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Liu Y, Suen CW, Zhang JF, Li G. Current concepts on tenogenic differentiation and clinical applications. J Orthop Translat 2017; 9:28-42. [PMID: 29662797 PMCID: PMC5822963 DOI: 10.1016/j.jot.2017.02.005] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Revised: 02/21/2017] [Accepted: 02/23/2017] [Indexed: 12/16/2022] Open
Abstract
Tendon is a tissue that transmits force from muscle to bone. Chronic or acute tendon injuries are very common, and are always accompanied by pain and a limited range of motion in patients. In clinical settings, management of tendon injuries still remains a big challenge. Cell therapies, such as the application of stem cells for tenogenic differentiation, were suggested to be an ideal strategy for clinical translation. However, there is still a lack of specific methods for tenogenic differentiation due to the limited understanding of tendon biology currently. This review focuses on the summary of current published strategies for tenogenic differentiation, such as the application of growth factors, mechanical stimulation, biomaterials, coculture, or induced pluripotent stem cells. Current clinical applications of stem cells for treatment of tendon injuries and their limitations have also been discussed in this review.
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Affiliation(s)
- Yang Liu
- Department of Orthopaedics and Traumatology, Faculty of Medicine, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong, China
| | - Chun-Wai Suen
- Department of Orthopaedics and Traumatology, Faculty of Medicine, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong, China
| | - Jin-fang Zhang
- Department of Orthopaedics and Traumatology, Faculty of Medicine, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong, China
| | - Gang Li
- Department of Orthopaedics and Traumatology, Faculty of Medicine, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong, China
- Stem Cells and Regenerative Medicine Laboratory, Lui Che Woo Institute of Innovative Medicine, Li Ka Shing Institute of Health Sciences, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong, China
- Key Laboratory for Regenerative Medicine, Ministry of Education, School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China
- The CUHK-ACC Space Medicine Centre on Health Maintenance of Musculoskeletal System, The Chinese University of Hong Kong Shenzhen Research Institute, Shenzhen, China
- Corresponding author. Department of Orthopaedics and Traumatology and Li Ka Shing Institute of Health Sciences, Prince of Wales Hospital, The Chinese University of Hong Kong, 30-32 Ngan Shing Street, Shatin, New Territories, Hong Kong, China.Department of Orthopaedics and Traumatology and Li Ka Shing Institute of Health SciencesPrince of Wales HospitalThe Chinese University of Hong Kong30-32 Ngan Shing StreetShatinNew TerritoriesHong Kong, China
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50
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Youngstrom DW, LaDow JE, Barrett JG. Tenogenesis of bone marrow-, adipose-, and tendon-derived stem cells in a dynamic bioreactor. Connect Tissue Res 2016; 57:454-465. [PMID: 27028488 DOI: 10.3109/03008207.2015.1117458] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Tendons are frequently damaged and fail to regenerate, leading to pain, loss of function, and reduced quality of life. Mesenchymal stem cells (MSCs) possess clinically useful tissue-regenerative properties and have been exploited for use in tendon tissue engineering and cell therapy. However, MSCs exhibit phenotypic heterogeneity based on the donor tissue used, and the efficacy of cell-based treatment modalities may be improved by optimizing cell source based on relative differentiation capacity. Equine MSCs were isolated from bone marrow (BM), adipose (AD), and tendon (TN), expanded in monolayer prior to seeding on decellularized tendon scaffolds (DTS), and cell-laden constructs were placed in a bioreactor designed to mimic the biophysical environment of the tendon. It was hypothesized that TN MSCs would differentiate toward a tendon cell phenotype better than BM and AD MSCs in response to a conditioning period involving cyclic mechanical stimulation for 1 hour per day at 3% strain and 0.33 Hz. All cell types integrated into DTS adopted an elongated morphology similar to tenocytes, expressed tendon marker genes, and improved tissue mechanical properties after 11 days. TN MSCs expressed the greatest levels of scleraxis, collagen type-I, and cartilage oligomeric matrix protein. Major histocompatibility class-II protein mRNA expression was not detected in any of the MSC types, suggesting low immunogenicity for allogeneic transplantation. The results suggest that TN MSCs are the ideal cell type for regenerative medicine therapies for tendinopathies, exhibiting the most mature tendon-like phenotype in vitro. When TN MSCs are unavailable, BM or AD MSCs may serve as robust alternatives.
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Affiliation(s)
- Daniel W Youngstrom
- a Program in Biomedical and Veterinary Sciences, Marion duPont Scott Equine Medical Center , Virginia Tech , Leesburg , VA , USA
| | - Jade E LaDow
- a Program in Biomedical and Veterinary Sciences, Marion duPont Scott Equine Medical Center , Virginia Tech , Leesburg , VA , USA
| | - Jennifer G Barrett
- b Department of Large Animal Clinical Sciences, Marion duPont Scott Equine Medical Center , Virginia Tech , Leesburg , VA , USA
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