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Timmer KB, Killian ML, Harley BAC. Paracrine signals influence patterns of fibrocartilage differentiation in a lyophilized gelatin hydrogel for applications in rotator cuff repair. Biomater Sci 2024; 12:4806-4822. [PMID: 39150417 PMCID: PMC11404831 DOI: 10.1039/d4bm00543k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/17/2024]
Abstract
Rotator cuff injuries present a clinical challenge for repair due to current limitations in functional regeneration of the native tendon-to-bone enthesis. A biomaterial that can regionally instruct unique tissue-specific phenotypes offers potential to promote enthesis repair. We have recently demonstrated the mechanical benefits of a stratified triphasic biomaterial made up of tendon- and bone-mimetic collagen scaffold compartments connected via a continuous hydrogel, and we now explore the potential of a biologically favorable enthesis hydrogel for this application. Here we report in vitro behavior of human mesenchymal stem cells (hMSCs) within thiolated gelatin (Gel-SH) hydrogels in response to chondrogenic stimuli as well as paracrine signals derived from MSC-seeded bone and tendon scaffold compartments. Chondrogenic differentiation media promoted upregulation of cartilage and entheseal fibrocartilage matrix markers COL2, COLX, and ACAN as well as the enthesis-associated transcription factors SCX, SOX9, and RUNX2 in hMSCs within Gel-SH. Similar effects were observed in response to TGF-β3 and BMP-4, enthesis-associated growth factors known to play a role in entheseal development and maintenance. Conditioned media generated by hMSCs seeded in tendon- and bone-mimetic collagen scaffolds influenced patterns of gene expression regarding enthesis-relevant growth factors, matrix markers, and tendon-to-bone transcription factors for hMSCs within the material. Together, these findings demonstrate that a Gel-SH hydrogel provides a permissive environment for enthesis tissue engineering and highlights the significance of cellular crosstalk between adjacent compartments within a spatially graded biomaterial.
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Affiliation(s)
- Kyle B Timmer
- Dept. Chemical and Biomolecular Engineering, University of Illinois Urbana-Champaign, 110 Roger Adams Laboratory, 600 S. Mathews Ave., Urbana, IL 61801, USA.
| | - Megan L Killian
- Department of Orthopaedic Surgery, University of Michigan Ann Arbor, Ann Arbor, Michigan 48109, USA
- Department of Molecular and Integrative Physiology, University of Michigan Ann Arbor, Ann Arbor, Michigan 48109, USA
| | - Brendan A C Harley
- Dept. Chemical and Biomolecular Engineering, University of Illinois Urbana-Champaign, 110 Roger Adams Laboratory, 600 S. Mathews Ave., Urbana, IL 61801, USA.
- Cancer Center at Illinois, University of Illinois Urbana-Champaign, Urbana, IL 61801, USA
- Carl R. Woese Institute for Genomic Biology, University of Illinois Urbana-Champaign, Urbana, IL 61801, USA
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2
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Qin L, Lu J, He Q, Wang H, Yao L, Duffy M, Guo H, Braun C, Lin Y, Zhou Y, Liang Q, Bandyopadhyay S, Tan K, Choi Y, Liu S. Bone marrow adipogenic lineage precursors are the major regulator of bone resorption in adult mice. RESEARCH SQUARE 2024:rs.3.rs-4809633. [PMID: 39257979 PMCID: PMC11384808 DOI: 10.21203/rs.3.rs-4809633/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/12/2024]
Abstract
Bone resorption by osteoclasts is a critical step in bone remodeling, a process important for maintaining bone homeostasis and repairing injured bone. We previously identified a bone marrow mesenchymal subpopulation, marrow adipogenic lineage precursors (MALPs), and showed that its production of RANKL stimulates bone resorption in young mice using Adipoq-Cre. To exclude developmental defects and to investigate the role of MALPs-derived RANKL in adult bone, we generated inducible reporter mice (Adipoq-CreER Tomato) and RANKL deficient mice (Adipoq-CreER RANKLflox/flox, iCKO). Single cell-RNA sequencing data analysis, lineage tracing, and in situ hybridization revealed that Adipoq+ cells contain not only MALPs but also late mesenchymal progenitors capable of osteogenic differentiation. However, RANKLmRNA was only detected in MALPs, but not in osteogenic cells. RANKL deficiency in MALPs induced at 3 months of age rapidly increased trabecular bone mass in long bones as well as vertebrae within 1 month due to diminished bone resorption but had no effect on the cortical bone. Ovariectomy (OVX) induced trabecular bone loss at both sites. RANKL depletion either before OVX or at 6 weeks post OVX protected and restored trabecular bone mass. Furthermore, bone healing after drill-hole injury was delayed in iCKO mice. Together, our findings demonstrate that MALPs play a dominant role in controlling trabecular bone resorption and that RANKL from MALPs is essential for trabecular bone turnover in adult bone homeostasis, postmenopausal bone loss, and injury repair.
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Affiliation(s)
| | | | - Qi He
- University of Pennsylvania
| | | | | | | | | | | | | | | | | | | | - Kai Tan
- The Children's Hospital of Philadelphia
| | - Yongwon Choi
- University of Pennsylvania Perelman School of Medicine
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3
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Sorsby M, Almardini S, Alayyat A, Hughes A, Venkat S, Rahman M, Baker J, Rana R, Rosen V, Liu ES. The role of GDF5 in regulating enthesopathy development in the Hyp mouse model of XLH. J Bone Miner Res 2024; 39:1162-1173. [PMID: 38836497 PMCID: PMC11337578 DOI: 10.1093/jbmr/zjae086] [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: 01/18/2024] [Revised: 04/25/2024] [Accepted: 06/04/2024] [Indexed: 06/06/2024]
Abstract
X-linked hypophosphatemia (XLH) is caused by mutations in PHEX, leading to rickets and osteomalacia. Adults affected with XLH develop a mineralization of the bone-tendon attachment site (enthesis), called enthesopathy, which causes significant pain and impaired movement. Entheses in mice with XLH (Hyp) have enhanced bone morphogenetic protein (BMP) and Indian hedgehog (IHH) signaling. Treatment of Hyp mice with the BMP signaling blocker palovarotene attenuated BMP/IHH signaling in Hyp entheses, thus indicating that BMP signaling plays a pathogenic role in enthesopathy development and that IHH signaling is activated by BMP signaling in entheses. It was previously shown that mRNA expression of growth/differentiation factor 5 (Gdf5) is enhanced in Hyp entheses at P14. Thus, to determine a role for GDF5 in enthesopathy development, Gdf5 was deleted globally in Hyp mice and conditionally in Scx + cells of Hyp mice. In both murine models, BMP/IHH signaling was similarly decreased in Hyp entheses, leading to decreased enthesopathy. BMP/IHH signaling remained unaffected in WT entheses with decreased Gdf5 expression. Moreover, deletion of Gdf5 in Hyp entheses starting at P30, after enthesopathy has developed, partially reversed enthesopathy. Taken together, these results demonstrate that while GDF5 is not essential for modulating BMP/IHH signaling in WT entheses, inappropriate GDF5 activity in Scx + cells contributes to XLH enthesopathy development. As such, inhibition of GDF5 signaling may be beneficial for the treatment of XLH enthesopathy.
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Affiliation(s)
- Melissa Sorsby
- Division of Endocrinology, Diabetes, and Hypertension, Brigham and Women’s Hospital, Boston, MA 02115, United States
| | - Shaza Almardini
- Division of Endocrinology, Diabetes, and Hypertension, Brigham and Women’s Hospital, Boston, MA 02115, United States
| | - Ahmad Alayyat
- Division of Endocrinology, Diabetes, and Hypertension, Brigham and Women’s Hospital, Boston, MA 02115, United States
| | - Ashleigh Hughes
- Division of Endocrinology, Diabetes, and Hypertension, Brigham and Women’s Hospital, Boston, MA 02115, United States
| | - Shreya Venkat
- Division of Endocrinology, Diabetes, and Hypertension, Brigham and Women’s Hospital, Boston, MA 02115, United States
| | - Mansoor Rahman
- Division of Endocrinology, Diabetes, and Hypertension, Brigham and Women’s Hospital, Boston, MA 02115, United States
| | - Jiana Baker
- Division of Endocrinology, Diabetes, and Hypertension, Brigham and Women’s Hospital, Boston, MA 02115, United States
| | - Rakshya Rana
- Division of Endocrinology, Diabetes, and Hypertension, Brigham and Women’s Hospital, Boston, MA 02115, United States
| | - Vicki Rosen
- Department of Developmental Biology, Harvard School of Dental Medicine, Boston, MA 02115, United States
| | - Eva S Liu
- Division of Endocrinology, Diabetes, and Hypertension, Brigham and Women’s Hospital, Boston, MA 02115, United States
- Harvard Medical School, Boston, MA 02115, United States
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4
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Yambe S, Yoshimoto Y, Ikeda K, Maki K, Takimoto A, Tokuyama A, Higuchi S, Yu X, Uchibe K, Miura S, Watanabe H, Sakuma T, Yamamoto T, Tanimoto K, Kondoh G, Kasahara M, Mizoguchi T, Docheva D, Adachi T, Shukunami C. Sclerostin modulates mineralization degree and stiffness profile in the fibrocartilaginous enthesis for mechanical tissue integrity. Front Cell Dev Biol 2024; 12:1360041. [PMID: 38895158 PMCID: PMC11183276 DOI: 10.3389/fcell.2024.1360041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Accepted: 04/19/2024] [Indexed: 06/21/2024] Open
Abstract
Fibrocartilaginous entheses consist of tendons, unmineralized and mineralized fibrocartilage, and subchondral bone, each exhibiting varying stiffness. Here we examined the functional role of sclerostin, expressed in mature mineralized fibrochondrocytes. Following rapid mineralization of unmineralized fibrocartilage and concurrent replacement of epiphyseal hyaline cartilage by bone, unmineralized fibrocartilage reexpanded after a decline in alkaline phosphatase activity at the mineralization front. Sclerostin was co-expressed with osteocalcin at the base of mineralized fibrocartilage adjacent to subchondral bone. In Scx-deficient mice with less mechanical loading due to defects of the Achilles tendon, sclerostin+ fibrochondrocyte count significantly decreased in the defective enthesis where chondrocyte maturation was markedly impaired in both fibrocartilage and hyaline cartilage. Loss of the Sost gene, encoding sclerostin, elevated mineral density in mineralized zones of fibrocartilaginous entheses. Atomic force microscopy analysis revealed increased fibrocartilage stiffness. These lines of evidence suggest that sclerostin in mature mineralized fibrochondrocytes acts as a modulator for mechanical tissue integrity of fibrocartilaginous entheses.
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Affiliation(s)
- Shinsei Yambe
- Department of Molecular Biology and Biochemistry, Division of Dental Sciences, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Yuki Yoshimoto
- Department of Molecular Biology and Biochemistry, Division of Dental Sciences, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Kazutaka Ikeda
- Department of Molecular Biology and Biochemistry, Division of Dental Sciences, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
- Department of Orthodontics and Craniofacial Developmental Biology, Applied Life Sciences, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Koichiro Maki
- Laboratory of Biomechanics, Institute for Life and Medical Sciences, Kyoto University, Kyoto, Japan
| | - Aki Takimoto
- Department of Molecular Biology and Biochemistry, Division of Dental Sciences, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | | | - Shinnosuke Higuchi
- Department of Molecular Biology and Biochemistry, Division of Dental Sciences, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Xinyi Yu
- Department of Molecular Biology and Biochemistry, Division of Dental Sciences, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Kenta Uchibe
- Department of Maxillofacial Anatomy and Neuroscience, Division of Oral Health Sciences, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Shigenori Miura
- Department of Molecular Biology and Biochemistry, Division of Dental Sciences, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Hitomi Watanabe
- Laboratory of Integrative Biological Science, Institute for Life and Medical Sciences, Kyoto University, Kyoto, Japan
| | - Tetsushi Sakuma
- Division of Integrated Sciences for Life, Graduate School of Integrated Sciences for Life, Hiroshima University, Higashi-Hiroshima, Japan
| | - Takashi Yamamoto
- Division of Integrated Sciences for Life, Graduate School of Integrated Sciences for Life, Hiroshima University, Higashi-Hiroshima, Japan
| | - Kotaro Tanimoto
- Department of Orthodontics and Craniofacial Developmental Biology, Applied Life Sciences, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Gen Kondoh
- Laboratory of Integrative Biological Science, Institute for Life and Medical Sciences, Kyoto University, Kyoto, Japan
| | | | | | - Denitsa Docheva
- Department of Musculoskeletal Tissue Regeneration, Orthopaedic Hospital König-Ludwig-Haus, Julius-Maximilians-University Würzburg, Würzburg, Germany
| | - Taiji Adachi
- Laboratory of Biomechanics, Institute for Life and Medical Sciences, Kyoto University, Kyoto, Japan
| | - Chisa Shukunami
- Department of Molecular Biology and Biochemistry, Division of Dental Sciences, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
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5
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Chen Y, Li Y, Zhu W, Liu Q. Biomimetic gradient scaffolds for the tissue engineering and regeneration of rotator cuff enthesis. Biofabrication 2024; 16:032005. [PMID: 38697099 DOI: 10.1088/1758-5090/ad467d] [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: 11/23/2023] [Accepted: 05/02/2024] [Indexed: 05/04/2024]
Abstract
Rotator cuff tear is one of the most common musculoskeletal disorders, which often results in recurrent shoulder pain and limited movement. Enthesis is a structurally complex and functionally critical interface connecting tendon and bone that plays an essential role in maintaining integrity of the shoulder joint. Despite the availability of advanced surgical procedures for rotator cuff repair, there is a high rate of failure following surgery due to suboptimal enthesis healing and regeneration. Novel strategies based on tissue engineering are gaining popularity in improving tendon-bone interface (TBI) regeneration. Through incorporating physical and biochemical cues into scaffold design which mimics the structure and composition of native enthesis is advantageous to guide specific differentiation of seeding cells and facilitate the formation of functional tissues. In this review, we summarize the current state of research in enthesis tissue engineering highlighting the development and application of biomimetic scaffolds that replicate the gradient TBI. We also discuss the latest techniques for fabricating potential translatable scaffolds such as 3D bioprinting and microfluidic device. While preclinical studies have demonstrated encouraging results of biomimetic gradient scaffolds, the translation of these findings into clinical applications necessitates a comprehensive understanding of their safety and long-term efficacy.
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Affiliation(s)
- Yang Chen
- Department of Orthopaedics, The Second Xiangya Hospital, Central South University, Changsha, People's Republic of China
| | - Yexin Li
- Department of Orthopaedics, The Second Xiangya Hospital, Central South University, Changsha, People's Republic of China
| | - Weihong Zhu
- Department of Orthopaedics, The Second Xiangya Hospital, Central South University, Changsha, People's Republic of China
| | - Qian Liu
- Department of Orthopaedics, The Second Xiangya Hospital, Central South University, Changsha, People's Republic of China
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6
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Fogarty NL, Johnson T, Kwok B, Lin A, Tsinman TK, Jiang X, Koyama E, Han L, Baxter JR, Mauck RL, Dyment NA. Reduction in postnatal weight-bearing does not alter the trajectory of murine meniscus growth and maturation. J Orthop Res 2024; 42:894-904. [PMID: 37804210 PMCID: PMC10978302 DOI: 10.1002/jor.25711] [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: 04/12/2023] [Revised: 09/27/2023] [Accepted: 10/05/2023] [Indexed: 10/09/2023]
Abstract
The early postnatal period represents a critical window for the maturation and development of orthopedic tissues, including those within the knee joint. To understand how mechanical loading impacts the maturational trajectory of the meniscus and other tissues of the hindlimb, perturbation of postnatal weight bearing was achieved through surgical resection of the sciatic nerve in neonatal mice at 1 or 14 days old. Sciatic nerve resection (SNR) produced significant and persistent disruptions in gait, leading to reduced tibial length and reductions in Achilles tendon mechanical properties. However, SNR resulted in minimal disruptions in morphometric parameters of the menisci and other structures in the knee joint, with no detectable differences in Col1a1-YFP or Col2a1-CFP expressing cells within the menisci. Furthermore, micromechanical properties of the meniscus and cartilage (as assessed by atomic force microscopy-based nanoindentation testing) were not different between experimental groups. In contrast to our initial hypothesis, reduced hindlimb weight bearing via neonatal SNR did not significantly impact the growth and development of the knee meniscus. This unexpected finding demonstrates that the input mechanical threshold required to sustain meniscus development may be lower than previously hypothesized, though future studies incorporating skeletal kinematic models coupled with force plate measurements will be required to calculate the loads passing through the affected hindlimb and precisely define these thresholds. Collectively, these results provide insight into the mechanobiological responses of the meniscus to alterations in load, and contribute to our understanding of the factors that influence normal postnatal development.
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Affiliation(s)
- Natalie L Fogarty
- McKay Orthopaedic Research Laboratory, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Talayah Johnson
- McKay Orthopaedic Research Laboratory, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Bryan Kwok
- School of Biomedical Engineering, Science and Health Systems, Drexel University, Philadelphia, Pennsylvania, USA
| | - Alisia Lin
- McKay Orthopaedic Research Laboratory, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Tonia K Tsinman
- McKay Orthopaedic Research Laboratory, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Xi Jiang
- McKay Orthopaedic Research Laboratory, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Eiki Koyama
- Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
| | - Lin Han
- School of Biomedical Engineering, Science and Health Systems, Drexel University, Philadelphia, Pennsylvania, USA
| | - Josh R Baxter
- McKay Orthopaedic Research Laboratory, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Robert L Mauck
- McKay Orthopaedic Research Laboratory, University of Pennsylvania, Philadelphia, Pennsylvania, USA
- Translational Musculoskeletal Research Laboratory, CMC VA Medical Center, Philadelphia, Pennsylvania, USA
| | - Nathaniel A Dyment
- McKay Orthopaedic Research Laboratory, University of Pennsylvania, Philadelphia, Pennsylvania, USA
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7
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Steltzer SS, Abraham AC, Killian ML. Interfacial Tissue Regeneration with Bone. Curr Osteoporos Rep 2024; 22:290-298. [PMID: 38358401 PMCID: PMC11060924 DOI: 10.1007/s11914-024-00859-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 01/29/2024] [Indexed: 02/16/2024]
Abstract
PURPOSE OF REVIEW Interfacial tissue exists throughout the body at cartilage-to-bone (osteochondral interface) and tendon-to-bone (enthesis) interfaces. Healing of interfacial tissues is a current challenge in regenerative approaches because the interface plays a critical role in stabilizing and distributing the mechanical stress between soft tissues (e.g., cartilage and tendon) and bone. The purpose of this review is to identify new directions in the field of interfacial tissue development and physiology that can guide future regenerative strategies for improving post-injury healing. RECENT FINDINGS Cues from interfacial tissue development may guide regeneration including biological cues such as cell phenotype and growth factor signaling; structural cues such as extracellular matrix (ECM) deposition, ECM, and cell alignment; and mechanical cues such as compression, tension, shear, and the stiffness of the cellular microenvironment. In this review, we explore new discoveries in the field of interfacial biology related to ECM remodeling, cellular metabolism, and fate. Based on emergent findings across multiple disciplines, we lay out a framework for future innovations in the design of engineered strategies for interface regeneration. Many of the key mechanisms essential for interfacial tissue development and adaptation have high potential for improving outcomes in the clinic.
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Affiliation(s)
- Stephanie S Steltzer
- Department of Orthopaedic Surgery, University of Michigan Medical School, Ann Arbor, MI, USA
- Department of Molecular & Integrative Physiology, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Adam C Abraham
- Department of Orthopaedic Surgery, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Megan L Killian
- Department of Orthopaedic Surgery, University of Michigan Medical School, Ann Arbor, MI, USA.
- Department of Molecular & Integrative Physiology, University of Michigan Medical School, Ann Arbor, MI, USA.
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Chatterjee M, Evans MK, Bell R, Nguyen PK, Kamalitdinov TB, Korntner S, Kuo CK, Dyment NA, Andarawis-Puri N. Histological and immunohistochemical guide to tendon tissue. J Orthop Res 2023; 41:2114-2132. [PMID: 37321983 DOI: 10.1002/jor.25645] [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: 12/01/2022] [Revised: 06/02/2023] [Accepted: 06/11/2023] [Indexed: 06/17/2023]
Abstract
Tendons are unique dense connective tissues with discrete zones having specific structure and function. They are juxtaposed with other tissues (e.g., bone, muscle, and fat) with different compositional, structural, and mechanical properties. Additionally, tendon properties change drastically with growth and development, disease, aging, and injury. Consequently, there are unique challenges to performing high quality histological assessment of this tissue. To address this need, histological assessment was one of the breakout session topics at the 2022 Orthopaedic Research Society (ORS) Tendon Conference hosted at the University of Pennsylvania. The purpose of the breakout session was to discuss needs from members of the ORS Tendon Section related to histological procedures, data presentation, knowledge dissemination, and guidelines for future work. Therefore, this review provides a brief overview of the outcomes of this discussion and provides a set of guidelines, based on the perspectives from our laboratories, for histological assessment to assist researchers in their quest to utilize these techniques to enhance the outcomes and interpretations of their studies.
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Affiliation(s)
- Monideepa Chatterjee
- Nancy E. and Peter C. Meinig School of Biomedical Engineering, Cornell University, Ithaca, New York, USA
| | - Mary K Evans
- Department of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, Pennsylvania, USA
- Department of Bioengineering, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Rebecca Bell
- Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, New York, USA
| | - Phong K Nguyen
- Department of Biomedical Engineering, University of Rochester, Rochester, New York, USA
| | - Timur B Kamalitdinov
- Department of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, Pennsylvania, USA
- Department of Bioengineering, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Stefanie Korntner
- Fischell Department of Bioengineering, University of Maryland, College Park, Maryland, USA
| | - Catherine K Kuo
- Department of Biomedical Engineering, University of Rochester, Rochester, New York, USA
- Fischell Department of Bioengineering, University of Maryland, College Park, Maryland, USA
- Center for Musculoskeletal Research, University of Rochester Medical Center, Rochester, New York, USA
- Department of Orthopaedics, University of Maryland Medical Center, Baltimore, Maryland, USA
| | - Nathaniel A Dyment
- Department of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, Pennsylvania, USA
- Department of Bioengineering, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Nelly Andarawis-Puri
- Nancy E. and Peter C. Meinig School of Biomedical Engineering, Cornell University, Ithaca, New York, USA
- Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, New York, USA
- Hospital for Special Surgery, New York, New York, USA
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9
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Zhang T, Wan L, Xiao H, Wang L, Hu J, Lu H. Single-cell RNA sequencing reveals cellular and molecular heterogeneity in fibrocartilaginous enthesis formation. eLife 2023; 12:e85873. [PMID: 37698466 PMCID: PMC10513478 DOI: 10.7554/elife.85873] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Accepted: 09/10/2023] [Indexed: 09/13/2023] Open
Abstract
The attachment site of the rotator cuff (RC) is a classic fibrocartilaginous enthesis, which is the junction between bone and tendon with typical characteristics of a fibrocartilage transition zone. Enthesis development has historically been studied with lineage tracing of individual genes selected a priori, which does not allow for the determination of single-cell landscapes yielding mature cell types and tissues. Here, in together with open-source GSE182997 datasets (three samples) provided by Fang et al., we applied Single-cell RNA sequencing (scRNA-seq) to delineate the comprehensive postnatal RC enthesis growth and the temporal atlas from as early as postnatal day 1 up to postnatal week 8. And, we furtherly performed single-cell spatial transcriptomic sequencing on postnatal day 1 mouse enthesis, in order to deconvolute bone-tendon junction (BTJ) chondrocytes onto spatial spots. In summary, we deciphered the cellular heterogeneity and the molecular dynamics during fibrocartilage differentiation. Combined with current spatial transcriptomic data, our results provide a transcriptional resource that will support future investigations of enthesis development at the mechanistic level and may shed light on the strategies for enhanced RC healing outcomes.
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Affiliation(s)
- Tao Zhang
- Department of Sports Medicine, Xiangya Hospital Central South UniversityChangshaChina
- Key Laboratory of Organ Injury, Aging and Regenerative Medicine of Hunan ProvinceChangshaChina
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South UniversityChangshaChina
| | - Liyang Wan
- Department of Sports Medicine, Xiangya Hospital Central South UniversityChangshaChina
- Key Laboratory of Organ Injury, Aging and Regenerative Medicine of Hunan ProvinceChangshaChina
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South UniversityChangshaChina
| | - Han Xiao
- Department of Sports Medicine, Xiangya Hospital Central South UniversityChangshaChina
- Key Laboratory of Organ Injury, Aging and Regenerative Medicine of Hunan ProvinceChangshaChina
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South UniversityChangshaChina
| | - Linfeng Wang
- Department of Sports Medicine, Xiangya Hospital Central South UniversityChangshaChina
- Key Laboratory of Organ Injury, Aging and Regenerative Medicine of Hunan ProvinceChangshaChina
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South UniversityChangshaChina
| | - Jianzhong Hu
- Key Laboratory of Organ Injury, Aging and Regenerative Medicine of Hunan ProvinceChangshaChina
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South UniversityChangshaChina
- Department of Spine Surgery and Orthopaedics, Xiangya Hospital, Central South UniversityChangshaChina
| | - Hongbin Lu
- Department of Sports Medicine, Xiangya Hospital Central South UniversityChangshaChina
- Key Laboratory of Organ Injury, Aging and Regenerative Medicine of Hunan ProvinceChangshaChina
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South UniversityChangshaChina
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10
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Kamalitdinov TB, Fujino K, Keith Lang S, Jiang X, Madi R, Evans MK, Zgonis MH, Kuntz AF, Dyment NA. Targeting the hedgehog signaling pathway to improve tendon-to-bone integration. Osteoarthritis Cartilage 2023; 31:1202-1213. [PMID: 37146960 PMCID: PMC10524548 DOI: 10.1016/j.joca.2023.04.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 04/24/2023] [Accepted: 04/29/2023] [Indexed: 05/07/2023]
Abstract
OBJECTIVE While the role of hedgehog (Hh) signaling in promoting zonal fibrocartilage production during development is well-established, whether this pathway can be leveraged to improve tendon-to-bone repair in adults is unknown. Our objective was to genetically and pharmacologically stimulate the Hh pathway in cells that give rise to zonal fibrocartilaginous attachments to promote tendon-to-bone integration. DESIGN Hh signaling was stimulated genetically via constitutive Smo (SmoM2 construct) activation of bone marrow stromal cells or pharmacologically via systemic agonist delivery to mice following anterior cruciate ligament reconstruction (ACLR). To assess tunnel integration, we measured mineralized fibrocartilage (MFC) formation in these mice 28 days post-surgery and performed tunnel pullout testing. RESULTS Hh pathway-related genes increased in cells forming the zonal attachments in wild-type mice. Both genetic and pharmacologic stimulation of the Hh pathway increased MFC formation and integration strength 28 days post-surgery. We next conducted studies to define the role of Hh in specific stages of the tunnel integration process. We found Hh agonist treatment increased the proliferation of the progenitor pool in the first week post-surgery. Additionally, genetic stimulation led to continued MFC production in the later stages of the integration process. These results indicate that Hh signaling plays an important biphasic role in cell proliferation and differentiation towards fibrochondrocytes following ACLR. CONCLUSION This study reveals a biphasic role for Hh signaling during the tendon-to-bone integration process after ACLR. In addition, the Hh pathway is a promising therapeutic target to improve tendon-to-bone repair outcomes.
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Affiliation(s)
- Timur B Kamalitdinov
- Department of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, PA, USA; Department of Bioengineering, University of Pennsylvania, Philadelphia, PA, USA
| | - Keitaro Fujino
- Department of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, PA, USA; Osaka Medical and Pharmaceutical University, Takatsuki, Osaka Prefecture, Japan
| | - Sinaia Keith Lang
- Department of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, PA, USA; Department of Biology, University of Pennsylvania, Philadelphia, PA, USA
| | - Xi Jiang
- Department of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, PA, USA
| | - Rashad Madi
- Department of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, PA, USA
| | - Mary Kate Evans
- Department of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, PA, USA; Department of Bioengineering, University of Pennsylvania, Philadelphia, PA, USA
| | - Miltiadis H Zgonis
- Department of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, PA, USA
| | - Andrew F Kuntz
- Department of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, PA, USA
| | - Nathaniel A Dyment
- Department of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, PA, USA; Department of Bioengineering, University of Pennsylvania, Philadelphia, PA, USA.
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11
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Wernlé KK, Sonnenfelt MA, Leek CC, Ganji E, Sullivan AL, Offutt C, Shuff J, Ornitz DM, Killian ML. Loss of Fgfr1 and Fgfr2 in Scleraxis-lineage cells leads to enlarged bone eminences and attachment cell death. Dev Dyn 2023; 252:1180-1188. [PMID: 37212424 PMCID: PMC10524747 DOI: 10.1002/dvdy.600] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Revised: 04/03/2023] [Accepted: 04/10/2023] [Indexed: 05/23/2023] Open
Abstract
BACKGROUND Tendons and ligaments attach to bone are essential for joint mobility and stability in vertebrates. Tendon and ligament attachments (ie, entheses) are found at bony protrusions (ie, eminences), and the shape and size of these protrusions depend on both mechanical forces and cellular cues during growth. Tendon eminences also contribute to mechanical leverage for skeletal muscle. Fibroblast growth factor receptor (FGFR) signaling plays a critical role in bone development, and Fgfr1 and Fgfr2 are highly expressed in the perichondrium and periosteum of bone where entheses can be found. RESULTS AND CONCLUSIONS We used transgenic mice for combinatorial knockout of Fgfr1 and/or Fgfr2 in tendon/attachment progenitors (ScxCre) and measured eminence size and shape. Conditional deletion of both, but not individual, Fgfr1 and Fgfr2 in Scx progenitors led to enlarged eminences in the postnatal skeleton and shortening of long bones. In addition, Fgfr1/Fgfr2 double conditional knockout mice had more variation collagen fibril size in tendon, decreased tibial slope, and increased cell death at ligament attachments. These findings identify a role for FGFR signaling in regulating growth and maintenance of tendon/ligament attachments and the size and shape of bony eminences.
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Affiliation(s)
- Kendra K. Wernlé
- Department of Biomedical Engineering, University of Delaware, 150 Academy St, Newark, Delaware, 19716
- Institute of Anatomy, University of Zürich, Winterthurerstrasse 190, Zürich, Switzerland
| | - Michael A. Sonnenfelt
- Department of Biomedical Engineering, University of Delaware, 150 Academy St, Newark, Delaware, 19716
| | - Connor C. Leek
- Department of Biomedical Engineering, University of Delaware, 150 Academy St, Newark, Delaware, 19716
- Department of Orthopaedic Surgery, University of Michigan, 109 Zina Pitcher Pl, Ann Arbor, MI 48109
| | - Elahe Ganji
- Department of Biomedical Engineering, University of Delaware, 150 Academy St, Newark, Delaware, 19716
- Department of Orthopaedic Surgery, University of Michigan, 109 Zina Pitcher Pl, Ann Arbor, MI 48109
- Department of Mechanical Engineering, University of Delaware, 130 Academy St, Newark, DE 19716
| | - Anna Lia Sullivan
- Department of Biomedical Engineering, University of Delaware, 150 Academy St, Newark, Delaware, 19716
| | - Claudia Offutt
- Department of Biomedical Engineering, University of Delaware, 150 Academy St, Newark, Delaware, 19716
| | - Jordan Shuff
- Department of Biomedical Engineering, University of Delaware, 150 Academy St, Newark, Delaware, 19716
| | - David M. Ornitz
- Department of Developmental Biology, Washington University School of Medicine, 660 S. Euclid Avenue, St Louis, Missouri, 63110
| | - Megan L. Killian
- Department of Biomedical Engineering, University of Delaware, 150 Academy St, Newark, Delaware, 19716
- Department of Orthopaedic Surgery, University of Michigan, 109 Zina Pitcher Pl, Ann Arbor, MI 48109
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12
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Loder S, Patel N, Morgani S, Sambon M, Leucht P, Levi B. Genetic models for lineage tracing in musculoskeletal development, injury, and healing. Bone 2023; 173:116777. [PMID: 37156345 PMCID: PMC10860167 DOI: 10.1016/j.bone.2023.116777] [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: 01/12/2023] [Revised: 04/07/2023] [Accepted: 04/17/2023] [Indexed: 05/10/2023]
Abstract
Musculoskeletal development and later post-natal homeostasis are highly dynamic processes, marked by rapid structural and functional changes across very short periods of time. Adult anatomy and physiology are derived from pre-existing cellular and biochemical states. Consequently, these early developmental states guide and predict the future of the system as a whole. Tools have been developed to mark, trace, and follow specific cells and their progeny either from one developmental state to the next or between circumstances of health and disease. There are now many such technologies alongside a library of molecular markers which may be utilized in conjunction to allow for precise development of unique cell 'lineages'. In this review, we first describe the development of the musculoskeletal system beginning as an embryonic germ layer and at each of the key developmental stages that follow. We then discuss these structures in the context of adult tissues during homeostasis, injury, and repair. Special focus is given in each of these sections to the key genes involved which may serve as markers of lineage or later in post-natal tissues. We then finish with a technical assessment of lineage tracing and the techniques and technologies currently used to mark cells, tissues, and structures within the musculoskeletal system.
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Affiliation(s)
- Shawn Loder
- Department of Plastic Surgery, University of Pittsburgh, Scaife Hall, Suite 6B, 3550 Terrace Street, Pittsburgh, PA 15261, USA
| | - Nicole Patel
- Center for Organogenesis and Trauma, Department of Surgery, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | | | | | | | - Benjamin Levi
- Center for Organogenesis and Trauma, Department of Surgery, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA.
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13
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Abdalla AA, Pendegrass CJ. Biological approaches to the repair and regeneration of the rotator cuff tendon-bone enthesis: a literature review. BIOMATERIALS TRANSLATIONAL 2023; 4:85-103. [PMID: 38283917 PMCID: PMC10817785 DOI: 10.12336/biomatertransl.2023.02.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/04/2023] [Revised: 03/15/2023] [Accepted: 05/05/2023] [Indexed: 01/30/2024]
Abstract
Entheses are highly specialised organs connecting ligaments and tendons to bones, facilitating force transmission, and providing mechanical strengths to absorb forces encountered. Two types of entheses, fibrocartilaginous and fibrous, exist in interfaces. The gradual fibrocartilaginous type is in rotator cuff tendons and is more frequently injured due to the poor healing capacity that leads to loss of the original structural and biomechanical properties and is attributed to the high prevalence of retears. Fluctuating methodologies and outcomes of biological approaches are challenges to overcome for them to be routinely used in clinics. Therefore, stratifying the existing literature according to different categories (chronicity, extent of tear, and studied population) would effectively guide repair approaches. This literature review supports tissue engineering approaches to promote rotator cuff enthesis healing employing cells, growth factors, and scaffolds period. Outcomes suggest its promising role in animal studies as well as some clinical trials and that combination therapies are more beneficial than individualized ones. It then highlights the importance of tailoring interventions according to the tear extent, chronicity, and the population being treated. Contributing factors such as loading, deficiencies, and lifestyle habits should also be taken into consideration. Optimum results can be achieved if biological, mechanical, and environmental factors are approached. It is challenging to determine whether variations are due to the interventions themselves, the animal models, loading regimen, materials, or tear mechanisms. Future research should focus on tailoring interventions for different categories to formulate protocols, which would best guide regenerative medicine decision making.
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Affiliation(s)
- Ahlam A. Abdalla
- Institute of Sport, Exercise and Health (ISEH), Division of Surgery & Interventional Sciences, University College London, London, UK
| | - Catherine J. Pendegrass
- Department of Orthopaedics & Musculoskeletal Science, Division of Surgery & Interventional Sciences, University College London, Brockley Hill, Stanmore, UK
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14
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Gögele C, Hahn J, Schulze-Tanzil G. Anatomical Tissue Engineering of the Anterior Cruciate Ligament Entheses. Int J Mol Sci 2023; 24:ijms24119745. [PMID: 37298698 DOI: 10.3390/ijms24119745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 05/23/2023] [Accepted: 05/26/2023] [Indexed: 06/12/2023] Open
Abstract
The firm integration of anterior cruciate ligament (ACL) grafts into bones remains the most demanding challenge in ACL reconstruction, since graft loosening means graft failure. For a functional-tissue-engineered ACL substitute to be realized in future, robust bone attachment sites (entheses) have to be re-established. The latter comprise four tissue compartments (ligament, non-calcified and calcified fibrocartilage, separated by the tidemark, bone) forming a histological and biomechanical gradient at the attachment interface between the ACL and bone. The ACL enthesis is surrounded by the synovium and exposed to the intra-articular micromilieu. This review will picture and explain the peculiarities of these synovioentheseal complexes at the femoral and tibial attachment sites based on published data. Using this, emerging tissue engineering (TE) strategies addressing them will be discussed. Several material composites (e.g., polycaprolactone and silk fibroin) and manufacturing techniques (e.g., three-dimensional-/bio-printing, electrospinning, braiding and embroidering) have been applied to create zonal cell carriers (bi- or triphasic scaffolds) mimicking the ACL enthesis tissue gradients with appropriate topological parameters for zones. Functionalized or bioactive materials (e.g., collagen, tricalcium phosphate, hydroxyapatite and bioactive glass (BG)) or growth factors (e.g., bone morphogenetic proteins [BMP]-2) have been integrated to achieve the zone-dependent differentiation of precursor cells. However, the ACL entheses comprise individual (loading history) asymmetric and polar histoarchitectures. They result from the unique biomechanical microenvironment of overlapping tensile, compressive and shear forces involved in enthesis formation, maturation and maintenance. This review should provide a road map of key parameters to be considered in future in ACL interface TE approaches.
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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
| | - Judith Hahn
- Workgroup BioEngineering, Department Materials Engineering, Institute of Polymers Materials, Leibniz-Institut für Polymerforschung Dresden e.V. (IPF), Hohe Straße 6, 01069 Dresden, Germany
| | - 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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15
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Ozone K, Minegishi Y, Takahata K, Takahashi H, Yoneno M, Hattori S, Xianglan L, Oka Y, Murata K, Kanemura N. Eccentric contraction-dominant exercise leads to molecular biological changes in enthesis and enthesopathy-like morphological changes. J Orthop Res 2023; 41:511-523. [PMID: 35716158 DOI: 10.1002/jor.25399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/09/2022] [Revised: 06/02/2022] [Accepted: 06/15/2022] [Indexed: 02/04/2023]
Abstract
Entheses, which are tendon-to-bone attachment sites in the musculoskeletal system, play important roles in optimizing the mechanical stress and force transmitted from the muscle to the bone. Sports-related enthesopathy shows pathological features, including hyperplasia of the fibrocartilage (FC) region in the enthesis. The amount of exercise and type of muscle contraction during movement is involved in the pathogenesis of sports-related enthesopathy; however, the details of this condition are unclear. Here we examined the molecular pathways involved in the morphological changes of the muscle-tendon-enthesis complex and enthesis FC region in the supraspinatus muscle enthesis of mice under different exercise conditions. Following intervention, morphological changes in the muscle-tendon-enthesis complex were initiated in the eccentric contraction-dominant exercise group at 2 weeks, with activation of the transforming growth factor-β (TGFβ) superfamily pathway predicted by proteome and ingenuity pathway analyses. Histological and molecular biological analyses confirmed the activation of the TGFβ/bone morphogenetic protein (BMP)-Smad pathway. The concentric contraction-dominant exercise group showed no change in the morphology of the muscle-tendon-enthesis complex or activation of the TGFβ/BMP-Smad pathway, despite overuse exercise. Statement of Clinical Significance: These results suggest that eccentric contraction-dominant exercise induces sports-related enthesopathy-like morphological changes in the early stages as well as molecular biological changes, mainly in the transforming growth factor-β superfamily pathway in enthesis. Statement of Clinical Significance: These results suggest that eccentric contraction-dominant exercise induces sports-related enthesopathy-like morphological changes in the early stages as well as molecular biological changes, mainly in the transforming growth factor-β superfamily pathway in enthesis.
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Affiliation(s)
- Kaichi Ozone
- Department of Health and Social Services, Health and Social Services, Graduate School of Saitama Prefectural University, Koshigaya, Saitama, Japan.,Japan Society for the Promotion of Science, Tokyo, Japan
| | - Yuki Minegishi
- Department of Health and Social Services, Health and Social Services, Graduate School of Saitama Prefectural University, Koshigaya, Saitama, Japan.,Japan Society for the Promotion of Science, Tokyo, Japan
| | - Kei Takahata
- Department of Health and Social Services, Health and Social Services, Graduate School of Saitama Prefectural University, Koshigaya, Saitama, Japan
| | - Haruna Takahashi
- Department of Health and Social Services, Health and Social Services, Graduate School of Saitama Prefectural University, Koshigaya, Saitama, Japan
| | - Moe Yoneno
- Department of Health and Social Services, Health and Social Services, Graduate School of Saitama Prefectural University, Koshigaya, Saitama, Japan
| | - Shinya Hattori
- Nanotechnology Innovation Station, National Institute for Materials Science, Tsukuba, Japan
| | - Li Xianglan
- Nanotechnology Innovation Station, National Institute for Materials Science, Tsukuba, Japan
| | - Yuichiro Oka
- Department of Health and Social Services, Health and Social Services, Graduate School of Saitama Prefectural University, Koshigaya, Saitama, Japan
| | - Kenji Murata
- Department of Physical Therapy, Health and Social Services, Saitama Prefectural University, Koshigaya, Saitama, Japan
| | - Naohiko Kanemura
- Department of Physical Therapy, Health and Social Services, Saitama Prefectural University, Koshigaya, Saitama, Japan
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16
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Zhong L, Lu J, Fang J, Yao L, Yu W, Gui T, Duffy M, Holdreith N, Bautista CA, Huang X, Bandyopadhyay S, Tan K, Chen C, Choi Y, Jiang JX, Yang S, Tong W, Dyment N, Qin L. Csf1 from marrow adipogenic precursors is required for osteoclast formation and hematopoiesis in bone. eLife 2023; 12:e82112. [PMID: 36779854 PMCID: PMC10005765 DOI: 10.7554/elife.82112] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Accepted: 02/03/2023] [Indexed: 02/14/2023] Open
Abstract
Colony-stimulating factor 1 (Csf1) is an essential growth factor for osteoclast progenitors and an important regulator for bone resorption. It remains elusive which mesenchymal cells synthesize Csf1 to stimulate osteoclastogenesis. We recently identified a novel mesenchymal cell population, marrow adipogenic lineage precursors (MALPs), in bone. Compared to other mesenchymal subpopulations, MALPs expressed Csf1 at a much higher level and this expression was further increased during aging. To investigate its role, we constructed MALP-deficient Csf1 CKO mice using AdipoqCre. These mice had increased femoral trabecular bone mass, but their cortical bone appeared normal. In comparison, depletion of Csf1 in the entire mesenchymal lineage using Prrx1Cre led to a more striking high bone mass phenotype, suggesting that additional mesenchymal subpopulations secrete Csf1. TRAP staining revealed diminished osteoclasts in the femoral secondary spongiosa region of Csf1 CKOAdipoq mice, but not at the chondral-osseous junction nor at the endosteal surface of cortical bone. Moreover, Csf1 CKOAdipoq mice were resistant to LPS-induced calvarial osteolysis. Bone marrow cellularity, hematopoietic progenitors, and macrophages were also reduced in these mice. Taken together, our studies demonstrate that MALPs synthesize Csf1 to control bone remodeling and hematopoiesis.
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Affiliation(s)
- Leilei Zhong
- Department of Orthopaedic Surgery, Perelman School of Medicine, University of PennsylvaniaPhiladelphiaUnited States
| | - Jiawei Lu
- Department of Orthopaedic Surgery, Perelman School of Medicine, University of PennsylvaniaPhiladelphiaUnited States
| | - Jiankang Fang
- Department of Orthopaedic Surgery, Perelman School of Medicine, University of PennsylvaniaPhiladelphiaUnited States
| | - Lutian Yao
- Department of Orthopaedic Surgery, Perelman School of Medicine, University of PennsylvaniaPhiladelphiaUnited States
| | - Wei Yu
- Department of Orthopaedic Surgery, Perelman School of Medicine, University of PennsylvaniaPhiladelphiaUnited States
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and TechnologyWuhanChina
| | - Tao Gui
- Department of Orthopaedic Surgery, Perelman School of Medicine, University of PennsylvaniaPhiladelphiaUnited States
- Department of Bone and Joint Surgery, Institute of Orthopedic Diseases, The First Affiliated Hospital, Jinan UniversityGuangzhouChina
| | - Michael Duffy
- Department of Orthopaedic Surgery, Perelman School of Medicine, University of PennsylvaniaPhiladelphiaUnited States
| | - Nicholas Holdreith
- Division of Hematology, Children’s Hospital of PhiladelphiaPhiladelphiaUnited States
- Department of Pediatrics, Perelman School of Medicine, University of PennsylvaniaPhiladelphiaUnited States
| | - Catherine A Bautista
- Department of Orthopaedic Surgery, Perelman School of Medicine, University of PennsylvaniaPhiladelphiaUnited States
| | - Xiaobin Huang
- Department of Oral and Maxillofacial Surgery/Pharmacology, School of Dental Medicine, University of PennsylvaniaPhiladelphiaUnited States
| | - Shovik Bandyopadhyay
- Graduate Group in Cell and Molecular Biology, Perelman School of Medicine, University of PennsylvaniaPhiladelphiaUnited States
- Medical Scientist Training Program, Perelman School of Medicine, University of PennsylvaniaPhiladelphiaUnited States
| | - Kai Tan
- Department of Pediatrics, Perelman School of Medicine, University of PennsylvaniaPhiladelphiaUnited States
- Center for Childhood Cancer Research, The Children's Hospital of PhiladelphiaPhiladelphiaUnited States
| | - Chider Chen
- Department of Oral and Maxillofacial Surgery/Pharmacology, School of Dental Medicine, University of PennsylvaniaPhiladelphiaUnited States
| | - Yongwon Choi
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of PennsylvaniaPhiladelphiaUnited States
| | - Jean X Jiang
- Department of Biochemistry and Structural Biology, University of Texas Health Science Center at San AntonioSan AntonioUnited States
| | - Shuying Yang
- Department of Basic and Translational Sciences, School of Dental Medicine, University of PennsylvaniaPhiladelphiaUnited States
| | - Wei Tong
- Division of Hematology, Children’s Hospital of PhiladelphiaPhiladelphiaUnited States
- Department of Pediatrics, Perelman School of Medicine, University of PennsylvaniaPhiladelphiaUnited States
| | - Nathanial Dyment
- Department of Orthopaedic Surgery, Perelman School of Medicine, University of PennsylvaniaPhiladelphiaUnited States
| | - Ling Qin
- Department of Orthopaedic Surgery, Perelman School of Medicine, University of PennsylvaniaPhiladelphiaUnited States
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17
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Hasan MR, Koskenranta A, Alakurtti K, Takatalo M, Rice DP. RAB23 regulates musculoskeletal development and patterning. Front Cell Dev Biol 2023; 11:1049131. [PMID: 36910145 PMCID: PMC9995984 DOI: 10.3389/fcell.2023.1049131] [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: 09/20/2022] [Accepted: 02/07/2023] [Indexed: 02/25/2023] Open
Abstract
RAB23 is a small GTPase which functions at the plasma membrane to regulate growth factor signaling. Mutations in RAB23 cause Carpenter syndrome, a condition that affects normal organogenesis and patterning. In this study, we investigate the role of RAB23 in musculoskeletal development and show that it is required for patella bone formation and for the maintenance of tendon progenitors. The patella is the largest sesamoid bone in mammals and plays a critical role during movement by providing structural and mechanical support to the knee. Rab23 -/- mice fail to form a patella and normal knee joint. The patella is formed from Sox9 and scleraxis (Scx) double-positive chondroprogenitor cells. We show that RAB23 is required for the specification of SOX9 and scleraxis double-positive patella chondroprogenitors during the formation of patella anlagen and the subsequent establishment of patellofemoral joint. We find that scleraxis and SOX9 expression are disrupted in Rab23 -/- mice, and as a result, development of the quadriceps tendons, cruciate ligaments, patella tendons, and entheses is either abnormal or lost. TGFβ-BMP signaling is known to regulate patella initiation and patella progenitor differentiation and growth. We find that the expression of TGFβR2, BMPR1, BMP4, and pSmad are barely detectable in the future patella site and in the rudimentary tendons and ligaments around the patellofemoral joint in Rab23 -/- mice. Also, we show that GLI1, SOX9, and scleraxis, which regulate entheses establishment and maturation, are weakly expressed in Rab23 -/- mice. Further analysis of the skeletal phenotype of Rab23 -/- mice showed a close resemblance to that of Tgfβ2 -/- mice, highlighting a possible role for RAB23 in regulating TGFβ superfamily signaling.
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Affiliation(s)
- Md Rakibul Hasan
- Orthodontics, Oral and Maxillofacial Diseases, University of Helsinki, Helsinki, Finland
| | - Anna Koskenranta
- Orthodontics, Oral and Maxillofacial Diseases, University of Helsinki, Helsinki, Finland
| | - Kirsi Alakurtti
- Orthodontics, Oral and Maxillofacial Diseases, University of Helsinki, Helsinki, Finland
| | - Maarit Takatalo
- Orthodontics, Oral and Maxillofacial Diseases, University of Helsinki, Helsinki, Finland
| | - David P Rice
- Orthodontics, Oral and Maxillofacial Diseases, University of Helsinki, Helsinki, Finland.,Helsinki University Hospital, Helsinki, Finland
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18
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Chae S, Yong U, Park W, Choi YM, Jeon IH, Kang H, Jang J, Choi HS, Cho DW. 3D cell-printing of gradient multi-tissue interfaces for rotator cuff regeneration. Bioact Mater 2023; 19:611-625. [PMID: 35600967 PMCID: PMC9109128 DOI: 10.1016/j.bioactmat.2022.05.004] [Citation(s) in RCA: 16] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Revised: 05/02/2022] [Accepted: 05/02/2022] [Indexed: 12/21/2022] Open
Abstract
Owing to the prevalence of rotator cuff (RC) injuries and suboptimal healing outcome, rapid and functional regeneration of the tendon–bone interface (TBI) after RC repair continues to be a major clinical challenge. Given the essential role of the RC in shoulder movement, the engineering of biomimetic multi-tissue constructs presents an opportunity for complex TBI reconstruction after RC repair. Here, we propose a gradient cell-laden multi-tissue construct combined with compositional gradient TBI-specific bioinks via 3D cell-printing technology. In vitro studies demonstrated the capability of a gradient scaffold system in zone-specific inducibility and multi-tissue formation mimicking TBI. The regenerative performance of the gradient scaffold on RC regeneration was determined using a rat RC repair model. In particular, we adopted nondestructive, consecutive, and tissue-targeted near-infrared fluorescence imaging to visualize the direct anatomical change and the intricate RC regeneration progression in real time in vivo. Furthermore, the 3D cell-printed implant promotes effective restoration of shoulder locomotion function and accelerates TBI healing in vivo. In summary, this study identifies the therapeutic contribution of cell-printed constructs towards functional RC regeneration, demonstrating the translational potential of biomimetic gradient constructs for the clinical repair of multi-tissue interfaces. A biomimetic cellular TBI scaffold was 3D bioprinted with dECM bioinks. A gradient multi-tissue construct was implanted for RC repair in vivo. Targeted NIR fluorescence imaging facilitated real-time monitoring of TBI regeneration. The scaffolds had therapeutic contribution on gradient TBI regeneration and functional recovery.
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Affiliation(s)
- Suhun Chae
- Department of Mechanical Engineering, Pohang University of Science and Technology, 77 Cheongam-ro, Nam-gu, Gyeongsangbuk-do, Pohang, 37673, South Korea
- EDmicBio Inc., 111 Hoegi-ro, Dongdaemun-gu, Seoul 02445, South Korea
| | - Uijung Yong
- Department of Convergence IT Engineering, Pohang University of Science and Technology, 77 Cheongam-ro, Nam-gu, Gyeongsangbuk-do, Pohang, 37673, South Korea
| | - Wonbin Park
- Department of Mechanical Engineering, Pohang University of Science and Technology, 77 Cheongam-ro, Nam-gu, Gyeongsangbuk-do, Pohang, 37673, South Korea
| | - Yoo-mi Choi
- Department of Convergence IT Engineering, Pohang University of Science and Technology, 77 Cheongam-ro, Nam-gu, Gyeongsangbuk-do, Pohang, 37673, South Korea
| | - In-Ho Jeon
- Department of Orthopaedic Surgery, Asan Medical Center, College of Medicine, University of Ulsan, 86 Asanbyeongwon-gil, Songpa-gu, Seoul, 05505, South Korea
| | - Homan Kang
- Gordon Center for Medical Imaging, Department of Radiology, Massachusetts General Hospital & Harvard Medical School, 149 13th Street, Boston, MA, 02114, USA
| | - Jinah Jang
- Department of Mechanical Engineering, Pohang University of Science and Technology, 77 Cheongam-ro, Nam-gu, Gyeongsangbuk-do, Pohang, 37673, South Korea
- Institute for Convergence Research and Education in Advanced Technology, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, South Korea
- Department of Convergence IT Engineering, Pohang University of Science and Technology, 77 Cheongam-ro, Nam-gu, Gyeongsangbuk-do, Pohang, 37673, South Korea
- School of Interdisciplinary Bioscience and Bioengineering, Pohang University of Science and Technology, 77 Cheongam-ro, Nam-gu, Gyeongsangbuk-do, Pohang, 37673, South Korea
| | - Hak Soo Choi
- Gordon Center for Medical Imaging, Department of Radiology, Massachusetts General Hospital & Harvard Medical School, 149 13th Street, Boston, MA, 02114, USA
- Corresponding author.
| | - Dong-Woo Cho
- Department of Mechanical Engineering, Pohang University of Science and Technology, 77 Cheongam-ro, Nam-gu, Gyeongsangbuk-do, Pohang, 37673, South Korea
- Institute for Convergence Research and Education in Advanced Technology, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, South Korea
- Corresponding author. Department of Mechanical Engineering, Pohang University of Science and Technology, 77 Cheongam-ro, Nam-gu, Pohang, 37673, Kyungbuk, South Korea.
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19
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Wang Z, Ma C, Chen D, Haslett C, Xu C, Dong C, Wang X, Zheng M, Jing Y, Feng JQ. Tendon Cells Root Into (Instead of Attach to) Humeral Bone Head via Fibrocartilage-Enthesis. Int J Biol Sci 2023; 19:183-203. [PMID: 36594083 PMCID: PMC9760439 DOI: 10.7150/ijbs.79007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Accepted: 09/24/2022] [Indexed: 11/24/2022] Open
Abstract
Large joints are composed of two closely linked cartilages: articular cartilage (AC; rich in type II collagen, a well-studied tissue) and fibrocartilaginous enthesis (FE; rich in type I collagen, common disorder sites of enthesopathy and sporting injuries, although receiving little attention). For many years, both cartilages were thought to be formed by chondrocytes, whereas tendon, which attaches to the humeral bone head, is primarily considered as a completely different connective tissue. In this study, we raised an unconventional hypothesis: tendon cells directly form FE via cell transdifferentiation. To test this hypothesis, we first qualitatively and quantitatively demonstrated distinct differences between AC and FE in cell morphology and cell distribution, mineralization status, extracellular matrix (ECM) contents, and critical ECM protein expression profiles using comprehensive approaches. Next, we traced the cell fate of tendon cells using ScxLin (a tendon specific Cre ScxCreERT2; R26R-tdTomato line) with one-time tamoxifen induction at early (P3) or young adult (P28) stages and harvested mice at different development ages, respectively. Our early tracing data revealed different growth events in tendon and FE: an initial increase but gradual decrease in the ScxLin tendon cells and a continuous expansion in the ScxLin FE cells. The young adult tracing data demonstrated continuous recruitment of ScxLin cells into FE expansion during P28 and P56. A separate tracing line, 3.2 Col 1Lin (a so-called "bone-specific" line), further confirmed the direct contribution of tendon cells for FE cell formation, which occurred in days but FE ECM maturation (including high levels of SOST, a potent Wnt signaling inhibitor) took weeks. Finally, loss of function data using diphtheria toxin fragment A (DTA) in ScxLin cells demonstrated a significant reduction of ScxLin cells in both tendons and FE cells, whereas the gain of function study (by stabilizing β-catenin in ScxLin tendon cells via one-time injection of tamoxifen at P3 and harvesting at P60) displayed great expansion of both ScxLin tendon and FE mass. Together, our studies demonstrated that fibrocartilage is an invaded enthesis likely originating from the tendon via a quick cell transdifferentiation mechanism with a lengthy ECM maturation process. The postnatally formed fibrocartilage roots into existing cartilage and firmly connects tendon and bone instead of acting as a simple attachment site as widely believed. We believe that this study will stimulate more intense exploring in this understudied area, especially for patients with enthesopathy and sporting injuries.
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Affiliation(s)
- Zheng Wang
- Department of Biomedical Sciences, Texas A&M University College of Dentistry, Dallas, Texas 75246, USA
| | - Chi Ma
- Department of Orthopaedic Surgery, University of Texas Southwestern Medical Center, Dallas, TX, 75219, USA
| | - Diane Chen
- Department of Biomedical Sciences, Texas A&M University College of Dentistry, Dallas, Texas 75246, USA
| | - Caitlin Haslett
- Department of Biomedical Sciences, Texas A&M University College of Dentistry, Dallas, Texas 75246, USA
| | - Chunmei Xu
- Department of Biomedical Sciences, Texas A&M University College of Dentistry, Dallas, Texas 75246, USA
| | - Changchun Dong
- Department of Biomedical Sciences, Texas A&M University College of Dentistry, Dallas, Texas 75246, USA
| | - Xiaofang Wang
- Department of Biomedical Sciences, Texas A&M University College of Dentistry, Dallas, Texas 75246, USA
| | - Minghao Zheng
- Centre for Orthopaedic Research, Medical School, The University of Western Australia, Nedlands, WA, Australia
| | - Yan Jing
- Department of Orthodontics, Texas A&M University College of Dentistry, Dallas, TX, 75246, USA.,✉ Corresponding authors: Yan Jing, E-mail: Department of Orthodontics, Texas A&M University College of Dentistry, Dallas, Texas 75246, USA. Tel./Fax: +1-214-370-7327. Jian Q. Feng, E-mail: Dental School, the University of Western Australia, Nedlands, 6009 Perth, Australia. Tel./Fax: +1-469-487-4584
| | - Jian Q. Feng
- Dental School and Oral Health Centre, The University of Western Australia, Nedlands, 6009 Australia.,✉ Corresponding authors: Yan Jing, E-mail: Department of Orthodontics, Texas A&M University College of Dentistry, Dallas, Texas 75246, USA. Tel./Fax: +1-214-370-7327. Jian Q. Feng, E-mail: Dental School, the University of Western Australia, Nedlands, 6009 Perth, Australia. Tel./Fax: +1-469-487-4584
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20
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Macica CM, Luo J, Tommasini SM. The Enthesopathy of XLH Is a Mechanical Adaptation to Osteomalacia: Biomechanical Evidence from Hyp Mice. Calcif Tissue Int 2022; 111:313-322. [PMID: 35618776 DOI: 10.1007/s00223-022-00989-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Accepted: 05/06/2022] [Indexed: 11/02/2022]
Abstract
A major comorbidity of X-linked hypophosphatemia (XLH) is fibrocartilaginous tendinous insertion site mineralization resulting in painful enthesophytes that contribute to the adult clinical picture and significantly impact physical function. Enthesophytes in Hyp mice, a murine model of XLH are the result of a hyperplastic expansion of resident alkaline phosphatase, Sox9-positive mineralizing fibrochondrocytes. Here, we hypothesized hyperplasia as a compensatory physical adaptation to aberrant mechanical stresses at the level of the entheses interface inserting into pathologically soft bone. To test this hypothesis, we examined the Achilles insertion of the triceps surae developed under normal and impaired loading conditions in Hyp and WT mice. Tensile stiffness, ultimate strength, and maximum strain were measured and compared. Biomechanical testing revealed that under normal loading conditions, despite inserting into a soft bone matrix, both the enthesophyte development (9 weeks) and progression (6-8 months) of Hyp mice were equivalent to the mechanical properties of WT mice. Unloading the insertion during development significantly reduced alkaline phosphatase, Sox9-positive fibrochondrocytes. In WT mice, this correlated with a decrease in stiffness and ultimate strength relative to the control limb, confirming the critical role of mechanical loading in the development of the enthesis. Most significantly, in response to unloading, maximum strain was increased in tensile tests only in the setting of subchondral osteomalacia of Hyp mice. These data suggest that mineralizing fibrochondrocyte expansion in XLH occurs as a compensatory adaptation to the soft bone matrix.
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Affiliation(s)
- Carolyn M Macica
- Department of Medical Sciences, Frank H. Netter, M.D., School of Medicine at Quinnipiac University, North Haven, CT, 06518, USA.
- , 275, Mt Carmel Ave, Hamden, CT, 06518, USA.
| | - Jack Luo
- Department of Medical Sciences, Frank H. Netter, M.D., School of Medicine at Quinnipiac University, North Haven, CT, 06518, USA
| | - Steven M Tommasini
- Department of Orthopaedics and Rehabilitation, Yale University School of Medicine, New Haven, CT, 06510, USA
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21
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Ottone OK, Kim C, Collins JA, Risbud MV. The cGAS-STING Pathway Affects Vertebral Bone but Does Not Promote Intervertebral Disc Cell Senescence or Degeneration. Front Immunol 2022; 13:882407. [PMID: 35769461 PMCID: PMC9235924 DOI: 10.3389/fimmu.2022.882407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Accepted: 05/06/2022] [Indexed: 11/25/2022] Open
Abstract
The DNA-sensing cGAS-STING pathway promotes the senescence-associated secretory phenotype (SASP) and mediates type-I interferon inflammatory responses to foreign viral and bacterial DNA as well as self-DNA. Studies of the intervertebral disc in humans and mice demonstrate associations between aging, increased cell senescence, and disc degeneration. Herein we assessed the role of STING in SASP promotion in STING gain- (N153S) and loss-of-function mouse models. N153S mice evidenced elevated circulating levels of proinflammatory markers including IL-1β, IL-6, and TNF-α, showed elevated monocyte and macrophage abundance in the vertebral marrow, and exhibited a mild trabecular and cortical bone phenotype in caudal vertebrae. Interestingly, despite systemic inflammation, the structural integrity of the disc and knee articular joint remained intact, and cells did not show a loss of their phenotype or elevated SASP. Transcriptomic analysis of N153S tissues demonstrated an upregulated immune response by disc cells, which did not closely resemble inflammatory changes in human tissues. Interestingly, STING-/- mice also showed a mild vertebral bone phenotype, but the absence of STING did not reduce the abundance of SASP markers or improve the age-associated disc phenotype. Overall, the analyses of N153S and STING-/- mice suggest that the cGAS-STING pathway is not a major contributor to SASP induction and consequent disc aging and degeneration but may play a minor role in the maintenance of trabecular bone in the vertebrae. This work contributes to a growing body of work demonstrating that systemic inflammation is not a key driver of disc degeneration.
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Affiliation(s)
- Olivia K. Ottone
- Department of Orthopaedic Surgery, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, PA, United States
- Graduate Program in Cell Biology and Regenerative Medicine, Jefferson College of Life Sciences, Thomas Jefferson University, Philadelphia, PA, United States
| | - Cheeho Kim
- Department of Orthopaedic Surgery, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, PA, United States
| | - John A. Collins
- Department of Orthopaedic Surgery, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, PA, United States
| | - Makarand V. Risbud
- Department of Orthopaedic Surgery, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, PA, United States
- Graduate Program in Cell Biology and Regenerative Medicine, Jefferson College of Life Sciences, Thomas Jefferson University, Philadelphia, PA, United States
- *Correspondence: Makarand V. Risbud,
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22
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Pothiawala A, Sahbazoglu BE, Ang BK, Matthias N, Pei G, Yan Q, Davis BR, Huard J, Zhao Z, Nakayama N. GDF5+ chondroprogenitors derived from human pluripotent stem cells preferentially form permanent chondrocytes. Development 2022; 149:dev196220. [PMID: 35451016 PMCID: PMC9245189 DOI: 10.1242/dev.196220] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Accepted: 04/07/2022] [Indexed: 12/02/2023]
Abstract
It has been established in the mouse model that during embryogenesis joint cartilage is generated from a specialized progenitor cell type, distinct from that responsible for the formation of growth plate cartilage. We recently found that mesodermal progeny of human pluripotent stem cells gave rise to two types of chondrogenic mesenchymal cells in culture: SOX9+ and GDF5+ cells. The fast-growing SOX9+ cells formed in vitro cartilage that expressed chondrocyte hypertrophy markers and readily underwent mineralization after ectopic transplantation. In contrast, the slowly growing GDF5+ cells derived from SOX9+ cells formed cartilage that tended to express low to undetectable levels of chondrocyte hypertrophy markers, but expressed PRG4, a marker of embryonic articular chondrocytes. The GDF5+-derived cartilage remained largely unmineralized in vivo. Interestingly, chondrocytes derived from the GDF5+ cells seemed to elicit these activities via non-cell-autonomous mechanisms. Genome-wide transcriptomic analyses suggested that GDF5+ cells might contain a teno/ligamento-genic potential, whereas SOX9+ cells resembled neural crest-like progeny-derived chondroprogenitors. Thus, human pluripotent stem cell-derived GDF5+ cells specified to generate permanent-like cartilage seem to emerge coincidentally with the commitment of the SOX9+ progeny to the tendon/ligament lineage.
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Affiliation(s)
- Azim Pothiawala
- Institute of Molecular Medicine, McGovern Medical School, The University of Texas Health Science Center at Houston, Houston, TX 77030, USA
| | - Berke E. Sahbazoglu
- Institute of Molecular Medicine, McGovern Medical School, The University of Texas Health Science Center at Houston, Houston, TX 77030, USA
| | - Bryan K. Ang
- Institute of Molecular Medicine, McGovern Medical School, The University of Texas Health Science Center at Houston, Houston, TX 77030, USA
| | - Nadine Matthias
- Institute of Molecular Medicine, McGovern Medical School, The University of Texas Health Science Center at Houston, Houston, TX 77030, USA
| | - Guangsheng Pei
- Center for Precision Health, School of Biomedical Informatics, The University of Texas Health Science Center at Houston, Houston, TX 77030, USA
| | - Qing Yan
- Institute of Molecular Medicine, McGovern Medical School, The University of Texas Health Science Center at Houston, Houston, TX 77030, USA
| | - Brian R. Davis
- Institute of Molecular Medicine, McGovern Medical School, The University of Texas Health Science Center at Houston, Houston, TX 77030, USA
| | - Johnny Huard
- Department of Orthopedic Surgery, McGovern Medical School, The University of Texas Health Science Center at Houston, Houston, TX 77030, USA
- Center for Regenerative and Personalized Medicine, Steadman Philippon Research Institute, Vail, CO 81657, USA
| | - Zhongming Zhao
- Center for Precision Health, School of Biomedical Informatics, The University of Texas Health Science Center at Houston, Houston, TX 77030, USA
| | - Naoki Nakayama
- Institute of Molecular Medicine, McGovern Medical School, The University of Texas Health Science Center at Houston, Houston, TX 77030, USA
- Department of Orthopedic Surgery, McGovern Medical School, The University of Texas Health Science Center at Houston, Houston, TX 77030, USA
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23
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Nödl MT, Tsai SL, Galloway JL. The impact of Drew Noden's work on our understanding of craniofacial musculoskeletal integration. Dev Dyn 2022; 251:1250-1266. [PMID: 35338756 PMCID: PMC9357029 DOI: 10.1002/dvdy.471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Revised: 03/09/2022] [Accepted: 03/10/2022] [Indexed: 11/11/2022] Open
Abstract
The classical anatomist Drew Noden spearheaded craniofacial research, laying the foundation for our modern molecular understanding of development, evolution and disorders of the craniofacial skeleton. His work revealed the origin of cephalic musculature and the role of cranial neural crest in early formation and patterning of the head musculoskeletal structures. Much of modern cranial tendon research advances a foundation of knowledge that Noden built using classical quail-chick transplantation experiments. This elegant avian chimeric system involves grafting of donor quail cells into host chick embryos to identify the cell types they can form and their interactions with the surrounding tissues. In this review, we will give a brief background of vertebrate head formation and the impact of cranial neural crest on the patterning, development and evolution of the head musculoskeletal attachments. Using the zebrafish as a model system, we will discuss examples of modifications of craniofacial structures in evolution with a special focus on the role of tendon and ligaments. Lastly, we will discuss pathologies in craniofacial tendons and the importance of understanding the molecular and cellular dynamics during craniofacial tendon development in human disease. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Marie-Therese Nödl
- Center for Regenerative Medicine, Department of Orthopedic Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA
| | - Stephanie L Tsai
- Center for Regenerative Medicine, Department of Orthopedic Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA
| | - Jenna L Galloway
- Center for Regenerative Medicine, Department of Orthopedic Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA.,Harvard Stem Cell Institute, Cambridge, MA
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24
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Growth and mechanobiology of the tendon-bone enthesis. Semin Cell Dev Biol 2022; 123:64-73. [PMID: 34362655 PMCID: PMC8810906 DOI: 10.1016/j.semcdb.2021.07.015] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Revised: 07/17/2021] [Accepted: 07/20/2021] [Indexed: 12/15/2022]
Abstract
Tendons are cable-like connective tissues that transfer both active and passive forces generated by skeletal muscle to bone. In the mature skeleton, the tendon-bone enthesis is an interfacial zone of transitional tissue located between two mechanically dissimilar tissues: compliant, fibrous tendon to rigid, dense mineralized bone. In this review, we focus on emerging areas in enthesis development related to its structure, function, and mechanobiology, as well as highlight established and emerging signaling pathways and physiological processes that influence the formation and adaptation of this important transitional tissue.
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25
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Driving native-like zonal enthesis formation in engineered ligaments using mechanical boundary conditions and β-tricalcium phosphate. Acta Biomater 2022; 140:700-716. [PMID: 34954418 DOI: 10.1016/j.actbio.2021.12.020] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 12/15/2021] [Accepted: 12/20/2021] [Indexed: 11/21/2022]
Abstract
Fibrocartilaginous entheses are structurally complex tissues that translate load from elastic ligaments to stiff bone via complex zonal gradients in the organization, mineralization, and cell phenotype. Currently, these complex gradients necessary for long-term mechanical function are not recreated in soft tissue-to-bone healing or engineered replacements, contributing to high failure rates. Previously, we developed a culture system that guides ligament fibroblasts to develop aligned native-sized collagen fibers using high-density collagen gels and mechanical boundary conditions. These constructs are promising ligament replacements, however functional ligament-to-bone attachments, or entheses, are required for long-term function in vivo. The objective of this study was to investigate the effect of compressive mechanical boundary conditions and the addition of beta-tricalcium phosphate (βTCP), a known osteoconductive agent, on the development of zonal ligament-to-bone entheses. We found that compressive boundary clamps, that restrict cellular contraction and produce a zonal tensile-compressive environment, guide ligament fibroblasts to produce 3 unique zones of collagen organization and zonal accumulation of glycosaminoglycans (GAGs), type II, and type X collagen. Ultimately, by 6 weeks of culture these constructs had similar organization and composition as immature bovine entheses. Further, βTCP applied under the clamp enhanced maturation of these entheses, leading to significantly increased tensile moduli, and zonal GAG accumulation, ALP activity, and calcium-phosphate accumulation, suggesting the initiation of endochondral ossification. This culture system produced some of the most organized entheses to date, closely mirroring early postnatal enthesis development, and provides an in vitro platform to better understand the cues that drive enthesis maturation in vivo. STATEMENT OF SIGNIFICANCE: Ligaments are attached to bone via entheses. Entheses are complex tissues with gradients in organization, composition, and cell phenotype. Entheses are necessary for proper transfer of load from ligament-to-bone, but currently are not restored with healing or replacements. Here, we provide new insight into how tensile-compressive boundary conditions and βTCP drive zonal gradients in collagen organization, mineralization, and matrix composition, producing tissues similar to immature ligament-to-bone attachments. Collectively, this culture system uses a bottom-up approach with mechanical and biochemical cues to produce engineered replacements which closely mirror postnatal enthesis development. This culture system is a promising platform to better understanding the cues that regulate enthesis formation so to better drive enthesis regeneration following graft repair and in engineered replacements.
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26
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He P, Ruan D, Huang Z, Wang C, Xu Y, Cai H, Liu H, Fei Y, Heng BC, Chen W, Shen W. Comparison of Tendon Development Versus Tendon Healing and Regeneration. Front Cell Dev Biol 2022; 10:821667. [PMID: 35141224 PMCID: PMC8819183 DOI: 10.3389/fcell.2022.821667] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Accepted: 01/07/2022] [Indexed: 12/27/2022] Open
Abstract
Tendon is a vital connective tissue in human skeletal muscle system, and tendon injury is very common and intractable in clinic. Tendon development and repair are two closely related but still not fully understood processes. Tendon development involves multiple germ layer, as well as the regulation of diversity transcription factors (Scx et al.), proteins (Tnmd et al.) and signaling pathways (TGFβ et al.). The nature process of tendon repair is roughly divided in three stages, which are dominated by various cells and cell factors. This review will describe the whole process of tendon development and compare it with the process of tendon repair, focusing on the understanding and recent advances in the regulation of tendon development and repair. The study and comparison of tendon development and repair process can thus provide references and guidelines for treatment of tendon injuries.
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Affiliation(s)
- Peiwen He
- Department of Orthopedic Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Orthopedics Research Institute of Zhejiang University, Hangzhou, China
- Institute of Sports Medicine, Zhejiang University, Hangzhou, China
- Key Laboratory of Motor System Disease Research and Precision Therapy of Zhejiang Province, Hangzhou, China
| | - Dengfeng Ruan
- Department of Orthopedic Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Orthopedics Research Institute of Zhejiang University, Hangzhou, China
- Institute of Sports Medicine, Zhejiang University, Hangzhou, China
| | - Zizhan Huang
- Department of Orthopedic Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Orthopedics Research Institute of Zhejiang University, Hangzhou, China
- Institute of Sports Medicine, Zhejiang University, Hangzhou, China
| | - Canlong Wang
- Department of Orthopedic Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Orthopedics Research Institute of Zhejiang University, Hangzhou, China
- Institute of Sports Medicine, Zhejiang University, Hangzhou, China
| | - Yiwen Xu
- Department of Orthopedic Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Orthopedics Research Institute of Zhejiang University, Hangzhou, China
- Institute of Sports Medicine, Zhejiang University, Hangzhou, China
| | - Honglu Cai
- Department of Orthopedic Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Orthopedics Research Institute of Zhejiang University, Hangzhou, China
- Institute of Sports Medicine, Zhejiang University, Hangzhou, China
| | - Hengzhi Liu
- Department of Orthopedic Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Orthopedics Research Institute of Zhejiang University, Hangzhou, China
- Institute of Sports Medicine, Zhejiang University, Hangzhou, China
| | - Yang Fei
- Department of Orthopedic Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Orthopedics Research Institute of Zhejiang University, Hangzhou, China
- Institute of Sports Medicine, Zhejiang University, Hangzhou, China
| | - Boon Chin Heng
- Central Laboratory, Peking University School of Stomatology, Bejing, China
| | - Weishan Chen
- Department of Orthopedic Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Orthopedics Research Institute of Zhejiang University, Hangzhou, China
- Institute of Sports Medicine, Zhejiang University, Hangzhou, China
- *Correspondence: Weishan Chen, ; Weiliang Shen,
| | - Weiliang Shen
- Department of Orthopedic Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Orthopedics Research Institute of Zhejiang University, Hangzhou, China
- Institute of Sports Medicine, Zhejiang University, Hangzhou, China
- Key Laboratory of Motor System Disease Research and Precision Therapy of Zhejiang Province, Hangzhou, China
- Dr. Li Dak Sum and Yip Yio Chin Center for Stem Cell and Regenerative Medicine, Zhejiang University, Hangzhou, China
- China Orthopaedic Regenerative Medicine (CORMed), Hangzhou, China
- *Correspondence: Weishan Chen, ; Weiliang Shen,
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27
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Fang F, Sup M, Luzzi A, Ferrer X, Thomopoulos S. Hedgehog signaling underlying tendon and enthesis development and pathology. Matrix Biol 2022; 105:87-103. [PMID: 34954379 PMCID: PMC8821161 DOI: 10.1016/j.matbio.2021.12.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Revised: 12/18/2021] [Accepted: 12/19/2021] [Indexed: 02/08/2023]
Abstract
Hedgehog (Hh) signaling has been widely acknowledged to play essential roles in many developmental processes, including endochondral ossification and growth plate maintenance. Furthermore, a rising number of studies have shown that Hh signaling is necessary for tendon enthesis development. Specifically, the well-tuned regulation of Hh signaling during development drives the formation of a mineral gradient across the tendon enthesis fibrocartilage. However, aberrant Hh signaling can also lead to pathologic heterotopic ossification in tendon or osteophyte formation at the enthesis. Therefore, the therapeutic potential of Hh signaling modulation for treating tendon and enthesis diseases remains uncertain. For example, increased Hh signaling may enhance tendon-to-bone healing by promoting the formation of mineralized fibrocartilage at the healing interface, but pathologic heterotopic ossification may also be triggered in the adjacent tendon. Further work is needed to elucidate the distinct functions of Hh signaling in the tendon and enthesis to support the development of therapies that target the pathway.
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Affiliation(s)
- Fei Fang
- Department of Orthopedic Surgery, Columbia University, Black Building, Room 1408, 650W 168 ST, New York, NY 10032-3702, United States
| | - McKenzie Sup
- Department of Biomedical Engineering, Columbia University, New York, NY, United States
| | - Andrew Luzzi
- Department of Orthopedic Surgery, Columbia University, Black Building, Room 1408, 650W 168 ST, New York, NY 10032-3702, United States
| | - Xavier Ferrer
- Department of Orthopedic Surgery, Columbia University, Black Building, Room 1408, 650W 168 ST, New York, NY 10032-3702, United States
| | - Stavros Thomopoulos
- Department of Orthopedic Surgery, Columbia University, Black Building, Room 1408, 650W 168 ST, New York, NY 10032-3702, United States; Department of Biomedical Engineering, Columbia University, New York, NY, United States.
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28
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Romero A, Leurs N, Muñoz D, Debiais-Thibaud M, Marcellini S. Divergent Expression of SPARC, SPARC-L, and SCPP Genes During Jawed Vertebrate Cartilage Mineralization. Front Genet 2021; 12:788346. [PMID: 34899866 PMCID: PMC8656109 DOI: 10.3389/fgene.2021.788346] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2021] [Accepted: 11/10/2021] [Indexed: 11/21/2022] Open
Abstract
While cartilage is an ancient tissue found both in protostomes and deuterostomes, its mineralization evolved more recently, within the vertebrate lineage. SPARC, SPARC-L, and the SCPP members (Secretory Calcium-binding PhosphoProtein genes which evolved from SPARC-L) are major players of dentine and bone mineralization, but their involvement in the emergence of the vertebrate mineralized cartilage remains unclear. We performed in situ hybridization on mineralizing cartilaginous skeletal elements of the frog Xenopus tropicalis (Xt) and the shark Scyliorhinus canicula (Sc) to examine the expression of SPARC (present in both species), SPARC-L (present in Sc only) and the SCPP members (present in Xt only). We show that while mineralizing cartilage expresses SPARC (but not SPARC-L) in Sc, it expresses the SCPP genes (but not SPARC) in Xt, and propose two possible evolutionary scenarios to explain these opposite expression patterns. In spite of these genetic divergences, our data draw the attention on an overlooked and evolutionarily conserved peripheral cartilage subdomain expressing SPARC or the SCPP genes and exhibiting a high propensity to mineralize.
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Affiliation(s)
- Adrian Romero
- Laboratory of Development and Evolution (LADE), University of Concepción, Concepción, Chile
| | - Nicolas Leurs
- Institut des Sciences de l'Evolution de Montpellier, ISEM, Univ Montpellier, CNRS, IRD, EPHE, Montpellier, France
| | - David Muñoz
- Laboratory of Development and Evolution (LADE), University of Concepción, Concepción, Chile
| | - Mélanie Debiais-Thibaud
- Institut des Sciences de l'Evolution de Montpellier, ISEM, Univ Montpellier, CNRS, IRD, EPHE, Montpellier, France
| | - Sylvain Marcellini
- Laboratory of Development and Evolution (LADE), University of Concepción, Concepción, Chile
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29
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Mienaltowski MJ, Gonzales NL, Beall JM, Pechanec MY. Basic Structure, Physiology, and Biochemistry of Connective Tissues and Extracellular Matrix Collagens. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2021; 1348:5-43. [PMID: 34807414 DOI: 10.1007/978-3-030-80614-9_2] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
The physiology of connective tissues like tendons and ligaments is highly dependent upon the collagens and other such extracellular matrix molecules hierarchically organized within the tissues. By dry weight, connective tissues are mostly composed of fibrillar collagens. However, several other forms of collagens play essential roles in the regulation of fibrillar collagen organization and assembly, in the establishment of basement membrane networks that provide support for vasculature for connective tissues, and in the formation of extensive filamentous networks that allow for cell-extracellular matrix interactions as well as maintain connective tissue integrity. The structures and functions of these collagens are discussed in this chapter. Furthermore, collagen synthesis is a multi-step process that includes gene transcription, translation, post-translational modifications within the cell, triple helix formation, extracellular secretion, extracellular modifications, and then fibril assembly, fibril modifications, and fiber formation. Each step of collagen synthesis and fibril assembly is highly dependent upon the biochemical structure of the collagen molecules created and how they are modified in the cases of development and maturation. Likewise, when the biochemical structures of collagens or are compromised or these molecules are deficient in the tissues - in developmental diseases, degenerative conditions, or injuries - then the ultimate form and function of the connective tissues are impaired. In this chapter, we also review how biochemistry plays a role in each of the processes involved in collagen synthesis and assembly, and we describe differences seen by anatomical location and region within tendons. Moreover, we discuss how the structures of the molecules, fibrils, and fibers contribute to connective tissue physiology in health, and in pathology with injury and repair.
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Affiliation(s)
| | - Nicole L Gonzales
- Department of Animal Science, University of California Davis, Davis, CA, USA
| | - Jessica M Beall
- Department of Animal Science, University of California Davis, Davis, CA, USA
| | - Monica Y Pechanec
- Department of Animal Science, University of California Davis, Davis, CA, USA
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30
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McMullan P, Maye P, Yang Q, Rowe DW, Germain‐Lee EL. Parental Origin of
Gsα
Inactivation Differentially Affects Bone Remodeling in a Mouse Model of Albright Hereditary Osteodystrophy. JBMR Plus 2021; 6:e10570. [PMID: 35079678 PMCID: PMC8771002 DOI: 10.1002/jbm4.10570] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Revised: 09/25/2021] [Accepted: 10/08/2021] [Indexed: 01/13/2023] Open
Abstract
Albright hereditary osteodystrophy (AHO) is caused by heterozygous inactivation of GNAS, a complex locus that encodes the alpha‐stimulatory subunit of heterotrimeric G proteins (Gsα) in addition to NESP55 and XLαs due to alternative first exons. AHO skeletal manifestations include brachydactyly, brachymetacarpia, compromised adult stature, and subcutaneous ossifications. AHO patients with maternally‐inherited GNAS mutations develop pseudohypoparathyroidism type 1A (PHP1A) with resistance to multiple hormones that mediate their actions through G protein‐coupled receptors (GPCRs) requiring Gsα (eg, parathyroid hormone [PTH], thyroid‐stimulating hormone [TSH], growth hormone–releasing hormone [GHRH], calcitonin) and severe obesity. Paternally‐inherited GNAS mutations cause pseudopseudohypoparathyroidism (PPHP), in which patients have AHO skeletal features but do not develop hormonal resistance or marked obesity. These differences between PHP1A and PPHP are caused by tissue‐specific reduction of paternal Gsα expression. Previous reports in mice have shown loss of Gsα causes osteopenia due to impaired osteoblast number and function and suggest that AHO patients could display evidence of reduced bone mineral density (BMD). However, we previously demonstrated PHP1A patients display normal‐increased BMD measurements without any correlation to body mass index or serum PTH. Due to these observed differences between PHP1A and PPHP, we utilized our laboratory's AHO mouse model to address whether Gsα heterozygous inactivation differentially affects bone remodeling based on the parental inheritance of the mutation. We identified fundamental distinctions in bone remodeling between mice with paternally‐inherited (GnasE1+/−p) versus maternally‐inherited (GnasE1+/−m) mutations, and these findings were observed predominantly in female mice. Specifically, GnasE1+/−p mice exhibited reduced bone parameters due to impaired bone formation and enhanced bone resorption. GnasE1+/−m mice, however, displayed enhanced bone parameters due to both increased osteoblast activity and normal bone resorption. These in vivo distinctions in bone remodeling between GnasE1+/−p and GnasE1+/−m mice could potentially be related to changes in the bone microenvironment driven by calcitonin‐resistance within GnasE1+/−m osteoclasts. Further studies are warranted to assess how Gsα influences osteoblast–osteoclast coupling. © 2021 The Authors. JBMR Plus published by Wiley Periodicals LLC on behalf of American Society for Bone and Mineral Research.
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Affiliation(s)
- Patrick McMullan
- Department of Pediatrics University of Connecticut School of Medicine Farmington CT USA
- Department of Reconstructive Sciences University of Connecticut School of Dental Medicine Farmington CT USA
- Center for Regenerative Medicine and Skeletal Development University of Connecticut School of Dental Medicine Farmington CT USA
| | - Peter Maye
- Department of Reconstructive Sciences University of Connecticut School of Dental Medicine Farmington CT USA
- Center for Regenerative Medicine and Skeletal Development University of Connecticut School of Dental Medicine Farmington CT USA
| | - Qingfen Yang
- Department of Pediatrics University of Connecticut School of Medicine Farmington CT USA
- Department of Reconstructive Sciences University of Connecticut School of Dental Medicine Farmington CT USA
- Center for Regenerative Medicine and Skeletal Development University of Connecticut School of Dental Medicine Farmington CT USA
| | - David W. Rowe
- Department of Reconstructive Sciences University of Connecticut School of Dental Medicine Farmington CT USA
- Center for Regenerative Medicine and Skeletal Development University of Connecticut School of Dental Medicine Farmington CT USA
| | - Emily L. Germain‐Lee
- Department of Pediatrics University of Connecticut School of Medicine Farmington CT USA
- Department of Reconstructive Sciences University of Connecticut School of Dental Medicine Farmington CT USA
- Center for Regenerative Medicine and Skeletal Development University of Connecticut School of Dental Medicine Farmington CT USA
- Albright Center, Division of Pediatric Endocrinology Connecticut Children's Farmington CT USA
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31
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Tsinman TK, Jiang X, Han L, Koyama E, Mauck RL, Dyment NA. Intrinsic and growth-mediated cell and matrix specialization during murine meniscus tissue assembly. FASEB J 2021; 35:e21779. [PMID: 34314047 DOI: 10.1096/fj.202100499r] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Revised: 06/10/2021] [Accepted: 06/21/2021] [Indexed: 11/11/2022]
Abstract
The incredible mechanical strength and durability of mature fibrous tissues and their extremely limited turnover and regenerative capacity underscores the importance of proper matrix assembly during early postnatal growth. In tissues with composite extracellular matrix (ECM) structures, such as the adult knee meniscus, fibrous (Collagen-I rich), and cartilaginous (Collagen-II, proteoglycan-rich) matrix components are regionally segregated to the outer and inner portions of the tissue, respectively. While this spatial variation in composition is appreciated to be functionally important for resisting complex mechanical loads associated with gait, the establishment of these specialized zones is poorly understood. To address this issue, the following study tracked the growth of the murine meniscus from its embryonic formation through its first month of growth, encompassing the critical time-window during which animals begin to ambulate and weight bear. Using histological analysis, region specific high-throughput qPCR, and Col-1, and Col-2 fluorescent reporter mice, we found that matrix and cellular features defining specific tissue zones were already present at birth, before continuous weight-bearing had occurred. These differences in meniscus zones were further refined with postnatal growth and maturation, resulting in specialization of mature tissue regions. Taken together, this work establishes a detailed timeline of the concurrent spatiotemporal changes that occur at both the cellular and matrix level throughout meniscus maturation. The findings of this study provide a framework for investigating the reciprocal feedback between cells and their evolving microenvironments during assembly of a mechanically robust fibrocartilage tissue, thus providing insight into mechanisms of tissue degeneration and effective regenerative strategies.
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Affiliation(s)
- Tonia K Tsinman
- McKay Orthopaedic Research Laboratory, Department of Orthopaedic Surgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA.,Department of Bioengineering, University of Pennsylvania, Philadelphia, PA, USA.,Translational Musculoskeletal Research Center, Corporal Michael Crescenz VA Medical Center, Philadelphia, PA, USA
| | - Xi Jiang
- McKay Orthopaedic Research Laboratory, Department of Orthopaedic Surgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA.,Department of Bioengineering, University of Pennsylvania, Philadelphia, PA, USA
| | - Lin Han
- School of Biomedical Engineering, Science and Health Systems, Drexel University, Philadelphia, PA, USA
| | - Eiki Koyama
- Division of Orthopaedic Surgery, Department of Surgery, Translational Research Program in Pediatric Orthopaedics, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Robert L Mauck
- McKay Orthopaedic Research Laboratory, Department of Orthopaedic Surgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA.,Department of Bioengineering, University of Pennsylvania, Philadelphia, PA, USA.,Translational Musculoskeletal Research Center, Corporal Michael Crescenz VA Medical Center, Philadelphia, PA, USA
| | - Nathaniel A Dyment
- McKay Orthopaedic Research Laboratory, Department of Orthopaedic Surgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA.,Department of Bioengineering, University of Pennsylvania, Philadelphia, PA, USA
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32
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Wei Y, Sun H, Gui T, Yao L, Zhong L, Yu W, Heo SJ, Han L, Dyment NA, Liu XS, Zhang Y, Koyama E, Long F, Zgonis MH, Mauck RL, Ahn J, Qin L. The critical role of Hedgehog-responsive mesenchymal progenitors in meniscus development and injury repair. eLife 2021; 10:e62917. [PMID: 34085927 PMCID: PMC8177886 DOI: 10.7554/elife.62917] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Accepted: 05/18/2021] [Indexed: 12/18/2022] Open
Abstract
Meniscal tears are associated with a high risk of osteoarthritis but currently have no disease-modifying therapies. Using a Gli1 reporter line, we found that Gli1+ cells contribute to the development of meniscus horns from 2 weeks of age. In adult mice, Gli1+ cells resided at the superficial layer of meniscus and expressed known mesenchymal progenitor markers. In culture, meniscal Gli1+ cells possessed high progenitor activities under the control of Hh signal. Meniscus injury at the anterior horn induced a quick expansion of Gli1-lineage cells. Normally, meniscal tissue healed slowly, leading to cartilage degeneration. Ablation of Gli1+ cells further hindered this repair process. Strikingly, intra-articular injection of Gli1+ meniscal cells or an Hh agonist right after injury accelerated the bridging of the interrupted ends and attenuated signs of osteoarthritis. Taken together, our work identified a novel progenitor population in meniscus and proposes a new treatment for repairing injured meniscus and preventing osteoarthritis.
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MESH Headings
- Animals
- Cell Lineage
- Cell Proliferation
- Disease Models, Animal
- Hedgehog Proteins/genetics
- Hedgehog Proteins/metabolism
- Humans
- Male
- Menisci, Tibial/metabolism
- Menisci, Tibial/pathology
- Menisci, Tibial/surgery
- Mesenchymal Stem Cell Transplantation
- Mesenchymal Stem Cells/metabolism
- Mice, Knockout
- Osteoarthritis, Knee/genetics
- Osteoarthritis, Knee/metabolism
- Osteoarthritis, Knee/pathology
- Osteoarthritis, Knee/prevention & control
- Signal Transduction
- Swine
- Swine, Miniature
- Tibial Meniscus Injuries/genetics
- Tibial Meniscus Injuries/metabolism
- Tibial Meniscus Injuries/pathology
- Tibial Meniscus Injuries/surgery
- Time Factors
- Wound Healing
- Zinc Finger Protein GLI1/genetics
- Zinc Finger Protein GLI1/metabolism
- Mice
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Affiliation(s)
- Yulong Wei
- Department of Orthopaedic Surgery, Perelman School of Medicine, University of PennsylvaniaPhiladelphiaUnited States
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and TechnologyWuhanChina
| | - Hao Sun
- Department of Orthopaedic Surgery, Perelman School of Medicine, University of PennsylvaniaPhiladelphiaUnited States
- Department of Orthopedics, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen UniversityGuangzhouChina
| | - Tao Gui
- Department of Orthopaedic Surgery, Perelman School of Medicine, University of PennsylvaniaPhiladelphiaUnited States
- Department of Bone and Joint Surgery, Institute of Orthopedic Diseases, The First Affiliated Hospital, Jinan UniversityGuangzhouChina
| | - Lutian Yao
- Department of Orthopaedic Surgery, Perelman School of Medicine, University of PennsylvaniaPhiladelphiaUnited States
| | - Leilei Zhong
- Department of Orthopaedic Surgery, Perelman School of Medicine, University of PennsylvaniaPhiladelphiaUnited States
| | - Wei Yu
- Department of Orthopaedic Surgery, Perelman School of Medicine, University of PennsylvaniaPhiladelphiaUnited States
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and TechnologyWuhanChina
| | - Su-Jin Heo
- Department of Orthopaedic Surgery, Perelman School of Medicine, University of PennsylvaniaPhiladelphiaUnited States
- Translational Musculoskeletal Research Center, Corporal Michael J. Crescenz VA Medical CenterPhiladelphiaUnited States
| | - Lin Han
- School of Biomedical Engineering, Science and Health Systems, Drexel UniversityPhiladelphiaUnited States
| | - Nathaniel A Dyment
- Department of Orthopaedic Surgery, Perelman School of Medicine, University of PennsylvaniaPhiladelphiaUnited States
| | - Xiaowei Sherry Liu
- Department of Orthopaedic Surgery, Perelman School of Medicine, University of PennsylvaniaPhiladelphiaUnited States
| | - Yejia Zhang
- Department of Orthopaedic Surgery, Perelman School of Medicine, University of PennsylvaniaPhiladelphiaUnited States
- Translational Musculoskeletal Research Center, Corporal Michael J. Crescenz VA Medical CenterPhiladelphiaUnited States
- Department of Physical Medicine and Rehabilitation, Perelman School of Medicine, University of PennsylvaniaPhiladelphiaUnited States
| | - Eiki Koyama
- Translational Research Program in Pediatric Orthopaedics, The Children's Hospital of PhiladelphiaPhiladelphiaUnited States
| | - Fanxin Long
- Translational Research Program in Pediatric Orthopaedics, The Children's Hospital of PhiladelphiaPhiladelphiaUnited States
| | - Miltiadis H Zgonis
- Department of Orthopaedic Surgery, Perelman School of Medicine, University of PennsylvaniaPhiladelphiaUnited States
| | - Robert L Mauck
- Department of Orthopaedic Surgery, Perelman School of Medicine, University of PennsylvaniaPhiladelphiaUnited States
- Translational Musculoskeletal Research Center, Corporal Michael J. Crescenz VA Medical CenterPhiladelphiaUnited States
| | - Jaimo Ahn
- Department of Orthopaedic Surgery, Perelman School of Medicine, University of PennsylvaniaPhiladelphiaUnited States
- Department of Orthopaedic Surgery, University of Michigan Medical SchoolAnn ArborUnited States
| | - Ling Qin
- Department of Orthopaedic Surgery, Perelman School of Medicine, University of PennsylvaniaPhiladelphiaUnited States
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33
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Roffino S, Camy C, Foucault-Bertaud A, Lamy E, Pithioux M, Chopard A. Negative impact of disuse and unloading on tendon enthesis structure and function. LIFE SCIENCES IN SPACE RESEARCH 2021; 29:46-52. [PMID: 33888287 DOI: 10.1016/j.lssr.2021.03.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Revised: 02/19/2021] [Accepted: 03/05/2021] [Indexed: 06/12/2023]
Abstract
Exposure to chronic skeletal muscle disuse and unloading that astronauts experience results in muscle deconditioning and bone remodeling. Tendons involved in the transmission of force from muscles to skeleton are also affected. Understanding the changes that occur in muscle, tendon, and bone is an essential step toward limiting or preventing the deleterious effects of chronic reduction in mechanical load. Numerous reviews have reported the effects of this reduction on both muscle and bone, and to a lesser extent on the tendon. However, none focused on the tendon enthesis, the tendon-to-bone attachment site. While the enthesis structure appears to be determined by mechanical stress, little is known about enthesis plasticity. Our review first looks at the relationship between entheses and mechanical stress, exploring how tensile and compressive loads determine and influence enthesis structure and composition. The second part of this review addresses the deleterious effects of skeletal muscle disuse and unloading on enthesis structure, composition, and function. We discuss the possibility that spaceflight-induced enthesis remodeling could impact both the capacity of the enthesis to withstand compressive stress and its potential weakness. Finally, we point out how altered compressive strength at entheses could expose astronauts to the risk of developing enthesopathies.
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Affiliation(s)
- S Roffino
- ISM Inst Movement Sci, Aix-Marseille University, CNRS, Marseille, France.
| | - C Camy
- ISM Inst Movement Sci, Aix-Marseille University, CNRS, Marseille, France
| | - A Foucault-Bertaud
- INSERM 1263, INRA 1260, C2VN, Aix-Marseille University, Marseille, France
| | - E Lamy
- ISM Inst Movement Sci, Aix-Marseille University, CNRS, Marseille, France
| | - M Pithioux
- ISM Inst Movement Sci, Aix-Marseille University, CNRS, Marseille, France
| | - A Chopard
- DMEM, Montpellier University, INRAE, Montpellier, France
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34
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Bobzin L, Roberts RR, Chen HJ, Crump JG, Merrill AE. Development and maintenance of tendons and ligaments. Development 2021; 148:239823. [PMID: 33913478 DOI: 10.1242/dev.186916] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Tendons and ligaments are fibrous connective tissues vital to the transmission of force and stabilization of the musculoskeletal system. Arising in precise regions of the embryo, tendons and ligaments share many properties and little is known about the molecular differences that differentiate them. Recent studies have revealed heterogeneity and plasticity within tendon and ligament cells, raising questions regarding the developmental mechanisms regulating tendon and ligament identity. Here, we discuss recent findings that contribute to our understanding of the mechanisms that establish and maintain tendon progenitors and their differentiated progeny in the head, trunk and limb. We also review the extent to which these findings are specific to certain anatomical regions and model organisms, and indicate which findings similarly apply to ligaments. Finally, we address current research regarding the cellular lineages that contribute to tendon and ligament repair, and to what extent their regulation is conserved within tendon and ligament development.
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Affiliation(s)
- Lauren Bobzin
- Division of Biomedical Sciences, Center for Craniofacial Molecular Biology, Ostrow School of Dentistry, University of Southern California, Los Angeles, CA 90033, USA.,Department of Biochemistry and Molecular Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA
| | - Ryan R Roberts
- Division of Biomedical Sciences, Center for Craniofacial Molecular Biology, Ostrow School of Dentistry, University of Southern California, Los Angeles, CA 90033, USA.,Department of Biochemistry and Molecular Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA.,Eli and Edythe Broad Center for Regenerative Medicine and Stem Cell Research, Department of Stem Cell Biology and Regenerative Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA
| | - Hung-Jhen Chen
- Eli and Edythe Broad Center for Regenerative Medicine and Stem Cell Research, Department of Stem Cell Biology and Regenerative Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA
| | - J Gage Crump
- Eli and Edythe Broad Center for Regenerative Medicine and Stem Cell Research, Department of Stem Cell Biology and Regenerative Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA
| | - Amy E Merrill
- Division of Biomedical Sciences, Center for Craniofacial Molecular Biology, Ostrow School of Dentistry, University of Southern California, Los Angeles, CA 90033, USA.,Department of Biochemistry and Molecular Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA
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35
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Wang D, Zhang X, Huang S, Liu Y, Fu BSC, Mak KKL, Blocki AM, Yung PSH, Tuan RS, Ker DFE. Engineering multi-tissue units for regenerative Medicine: Bone-tendon-muscle units of the rotator cuff. Biomaterials 2021; 272:120789. [PMID: 33845368 DOI: 10.1016/j.biomaterials.2021.120789] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Revised: 03/25/2021] [Accepted: 03/26/2021] [Indexed: 12/13/2022]
Abstract
Our body systems are comprised of numerous multi-tissue units. For the musculoskeletal system, one of the predominant functional units is comprised of bone, tendon/ligament, and muscle tissues working in tandem to facilitate locomotion. To successfully treat musculoskeletal injuries and diseases, critical consideration and thoughtful integration of clinical, biological, and engineering aspects are necessary to achieve translational bench-to-bedside research. In particular, identifying ideal biomaterial design specifications, understanding prior and recent tissue engineering advances, and judicious application of biomaterial and fabrication technologies will be crucial for addressing current clinical challenges in engineering multi-tissue units. Using rotator cuff tears as an example, insights relevant for engineering a bone-tendon-muscle multi-tissue unit are presented. This review highlights the tissue engineering strategies for musculoskeletal repair and regeneration with implications for other bone-tendon-muscle units, their derivatives, and analogous non-musculoskeletal tissue structures.
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Affiliation(s)
- Dan Wang
- Institute for Tissue Engineering and Regenerative Medicine, The Chinese University of Hong Kong, Hong Kong SAR; School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong SAR; Ministry of Education Key Laboratory for Regenerative Medicine, School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong SAR; Department of Orthopaedics and Traumatology, The Chinese University of Hong Kong, Hong Kong SAR
| | - Xu Zhang
- Institute for Tissue Engineering and Regenerative Medicine, The Chinese University of Hong Kong, Hong Kong SAR; School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong SAR
| | - Shuting Huang
- Institute for Tissue Engineering and Regenerative Medicine, The Chinese University of Hong Kong, Hong Kong SAR; School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong SAR
| | - Yang Liu
- Department of Orthopaedics and Traumatology, The Chinese University of Hong Kong, Hong Kong SAR
| | - Bruma Sai-Chuen Fu
- Institute for Tissue Engineering and Regenerative Medicine, The Chinese University of Hong Kong, Hong Kong SAR; Department of Orthopaedics and Traumatology, The Chinese University of Hong Kong, Hong Kong SAR
| | | | - Anna Maria Blocki
- Institute for Tissue Engineering and Regenerative Medicine, The Chinese University of Hong Kong, Hong Kong SAR; School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong SAR; Department of Orthopaedics and Traumatology, The Chinese University of Hong Kong, Hong Kong SAR
| | - Patrick Shu-Hang Yung
- Institute for Tissue Engineering and Regenerative Medicine, The Chinese University of Hong Kong, Hong Kong SAR; Department of Orthopaedics and Traumatology, The Chinese University of Hong Kong, Hong Kong SAR
| | - Rocky S Tuan
- Institute for Tissue Engineering and Regenerative Medicine, The Chinese University of Hong Kong, Hong Kong SAR; School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong SAR
| | - Dai Fei Elmer Ker
- Institute for Tissue Engineering and Regenerative Medicine, The Chinese University of Hong Kong, Hong Kong SAR; School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong SAR; Ministry of Education Key Laboratory for Regenerative Medicine, School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong SAR; Department of Orthopaedics and Traumatology, The Chinese University of Hong Kong, Hong Kong SAR.
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36
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Tsai SL, Noedl MT, Galloway JL. Bringing tendon biology to heel: Leveraging mechanisms of tendon development, healing, and regeneration to advance therapeutic strategies. Dev Dyn 2021; 250:393-413. [PMID: 33169466 PMCID: PMC8486356 DOI: 10.1002/dvdy.269] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Revised: 10/29/2020] [Accepted: 11/03/2020] [Indexed: 12/11/2022] Open
Abstract
Tendons are specialized matrix-rich connective tissues that transmit forces from muscle to bone and are essential for movement. As tissues that frequently transfer large mechanical loads, tendons are commonly injured in patients of all ages. Following injury, mammalian tendons heal poorly through a slow process that forms disorganized fibrotic scar tissue with inferior biomechanical function. Current treatments are limited and patients can be left with a weaker tendon that is likely to rerupture and an increased chance of developing degenerative conditions. More effective, alternative treatments are needed. However, our current understanding of tendon biology remains limited. Here, we emphasize why expanding our knowledge of tendon development, healing, and regeneration is imperative for advancing tendon regenerative medicine. We provide a comprehensive review of the current mechanisms governing tendon development and healing and further highlight recent work in regenerative tendon models including the neonatal mouse and zebrafish. Importantly, we discuss how present and future discoveries can be applied to both augment current treatments and design novel strategies to treat tendon injuries.
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Affiliation(s)
- Stephanie L. Tsai
- Center for Regenerative Medicine, Department of Orthopedic Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114
- Harvard Stem Cell Institute, Cambridge, MA 02138
| | - Marie-Therese Noedl
- Center for Regenerative Medicine, Department of Orthopedic Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114
- Harvard Stem Cell Institute, Cambridge, MA 02138
| | - Jenna L. Galloway
- Center for Regenerative Medicine, Department of Orthopedic Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114
- Harvard Stem Cell Institute, Cambridge, MA 02138
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37
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Yu W, Zhong L, Yao L, Wei Y, Gui T, Li Z, Kim H, Holdreith N, Jiang X, Tong W, Dyment N, Liu XS, Yang S, Choi Y, Ahn J, Qin L. Bone marrow adipogenic lineage precursors promote osteoclastogenesis in bone remodeling and pathologic bone loss. J Clin Invest 2021; 131:140214. [PMID: 33206630 DOI: 10.1172/jci140214] [Citation(s) in RCA: 90] [Impact Index Per Article: 30.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Accepted: 10/29/2020] [Indexed: 02/06/2023] Open
Abstract
Bone is maintained by coupled activities of bone-forming osteoblasts/osteocytes and bone-resorbing osteoclasts. Alterations in this relationship can lead to pathologic bone loss such as osteoporosis. It is well known that osteogenic cells support osteoclastogenesis via production of RANKL. Interestingly, our recently identified bone marrow mesenchymal cell population-marrow adipogenic lineage precursors (MALPs) that form a multidimensional cell network in bone-was computationally demonstrated to be the most interactive with monocyte-macrophage lineage cells through high and specific expression of several osteoclast regulatory factors, including RANKL. Using an adipocyte-specific Adipoq-Cre to label MALPs, we demonstrated that mice with RANKL deficiency in MALPs have a drastic increase in trabecular bone mass in long bones and vertebrae starting from 1 month of age, while their cortical bone appears normal. This phenotype was accompanied by diminished osteoclast number and attenuated bone formation at the trabecular bone surface. Reduced RANKL signaling in calvarial MALPs abolished osteolytic lesions after LPS injections. Furthermore, in ovariectomized mice, elevated bone resorption was partially attenuated by RANKL deficiency in MALPs. In summary, our studies identified MALPs as a critical player in controlling bone remodeling during normal bone metabolism and pathological bone loss in a RANKL-dependent fashion.
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Affiliation(s)
- Wei Yu
- Department of Orthopaedic Surgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA.,Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Leilei Zhong
- Department of Orthopaedic Surgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Lutian Yao
- Department of Orthopaedic Surgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Yulong Wei
- Department of Orthopaedic Surgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA.,Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Tao Gui
- Department of Orthopaedic Surgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA.,Department of Bone and Joint Surgery, Institute of Orthopedic Diseases, The First Affiliated Hospital, Jinan University, Guangzhou, Guangdong, China
| | - Ziqing Li
- Department of Basic & Translational Sciences, School of Dental Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Hyunsoo Kim
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Nicholas Holdreith
- Division of Hematology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA.,Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Xi Jiang
- Department of Orthopaedic Surgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Wei Tong
- Division of Hematology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA.,Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Nathaniel Dyment
- Department of Orthopaedic Surgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - X Sherry Liu
- Department of Orthopaedic Surgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Shuying Yang
- Department of Basic & Translational Sciences, School of Dental Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Yongwon Choi
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Jaimo Ahn
- Department of Orthopaedic Surgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Ling Qin
- Department of Orthopaedic Surgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
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Kult S, Olender T, Osterwalder M, Markman S, Leshkowitz D, Krief S, Blecher-Gonen R, Ben-Moshe S, Farack L, Keren-Shaul H, Salame TM, Capellini TD, Itzkovitz S, Amit I, Visel A, Zelzer E. Bi-fated tendon-to-bone attachment cells are regulated by shared enhancers and KLF transcription factors. eLife 2021; 10:55361. [PMID: 33448926 PMCID: PMC7810463 DOI: 10.7554/elife.55361] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Accepted: 11/30/2020] [Indexed: 12/17/2022] Open
Abstract
The mechanical challenge of attaching elastic tendons to stiff bones is solved by the formation of a unique transitional tissue. Here, we show that murine tendon-to-bone attachment cells are bi-fated, activating a mixture of chondrocyte and tenocyte transcriptomes, under regulation of shared regulatory elements and Krüppel-like factors (KLFs) transcription factors. High-throughput bulk and single-cell RNA sequencing of humeral attachment cells revealed expression of hundreds of chondrogenic and tenogenic genes, which was validated by in situ hybridization and single-molecule ISH. ATAC sequencing showed that attachment cells share accessible intergenic chromatin areas with either tenocytes or chondrocytes. Epigenomic analysis revealed enhancer signatures for most of these regions. Transgenic mouse enhancer reporter assays verified the shared activity of some of these enhancers. Finally, integrative chromatin and motif analyses and transcriptomic data implicated KLFs as regulators of attachment cells. Indeed, blocking expression of both Klf2 and Klf4 in developing limb mesenchyme impaired their differentiation.
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Affiliation(s)
- Shiri Kult
- Department of Molecular Genetics, Weizmann Institute of Science, Rehovot, Israel
| | - Tsviya Olender
- Department of Molecular Genetics, Weizmann Institute of Science, Rehovot, Israel
| | - Marco Osterwalder
- Environmental Genomics and Systems Biology Division, Lawrence Berkeley National, Berkeley, United States.,Department for BioMedical Research (DBMR), University of Bern, Bern, Switzerland
| | - Svetalana Markman
- Department of Molecular Genetics, Weizmann Institute of Science, Rehovot, Israel
| | - Dena Leshkowitz
- Life Sciences Core Facilities, Weizmann Institute of Science, Rehovot, Israel
| | - Sharon Krief
- Department of Molecular Genetics, Weizmann Institute of Science, Rehovot, Israel
| | | | - Shani Ben-Moshe
- Department of Molecular Cell Biology, Weizmann Institute of Science, Rehovot, Israel
| | - Lydia Farack
- Department of Molecular Cell Biology, Weizmann Institute of Science, Rehovot, Israel
| | - Hadas Keren-Shaul
- Life Sciences Core Facilities, Weizmann Institute of Science, Rehovot, Israel
| | - Tomer-Meir Salame
- Life Sciences Core Facilities, Weizmann Institute of Science, Rehovot, Israel
| | - Terence D Capellini
- Department of Human Evolutionary Biology, Harvard University, Department of Human Evolutionary Biology, United States; Broad Institute of Harvard and MIT, Cambridge, United States
| | - Shalev Itzkovitz
- Department of Molecular Cell Biology, Weizmann Institute of Science, Rehovot, Israel
| | - Ido Amit
- Department of Immunology, Weizmann Institute of Science, Rehovot, Israel
| | - Axel Visel
- Environmental Genomics and Systems Biology Division, Lawrence Berkeley National, Berkeley, United States.,U.S. Department of Energy Joint Genome Institute, Lawrence Berkeley National Laboratory, Berkeley, United States.,School of Natural Sciences, University of California, Merced, Merced, United States
| | - Elazar Zelzer
- Department of Molecular Genetics, Weizmann Institute of Science, Rehovot, Israel
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Siadat SM, Zamboulis DE, Thorpe CT, Ruberti JW, Connizzo BK. Tendon Extracellular Matrix Assembly, Maintenance and Dysregulation Throughout Life. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2021; 1348:45-103. [PMID: 34807415 DOI: 10.1007/978-3-030-80614-9_3] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
In his Lissner Award medal lecture in 2000, Stephen Cowin asked the question: "How is a tissue built?" It is not a new question, but it remains as relevant today as it did when it was asked 20 years ago. In fact, research on the organization and development of tissue structure has been a primary focus of tendon and ligament research for over two centuries. The tendon extracellular matrix (ECM) is critical to overall tissue function; it gives the tissue its unique mechanical properties, exhibiting complex non-linear responses, viscoelasticity and flow mechanisms, excellent energy storage and fatigue resistance. This matrix also creates a unique microenvironment for resident cells, allowing cells to maintain their phenotype and translate mechanical and chemical signals into biological responses. Importantly, this architecture is constantly remodeled by local cell populations in response to changing biochemical (systemic and local disease or injury) and mechanical (exercise, disuse, and overuse) stimuli. Here, we review the current understanding of matrix remodeling throughout life, focusing on formation and assembly during the postnatal period, maintenance and homeostasis during adulthood, and changes to homeostasis in natural aging. We also discuss advances in model systems and novel tools for studying collagen and non-collagenous matrix remodeling throughout life, and finally conclude by identifying key questions that have yet to be answered.
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Affiliation(s)
| | - Danae E Zamboulis
- Institute of Life Course and Medical Sciences, Faculty of Health and Life Sciences, University of Liverpool, Liverpool, UK
| | - Chavaunne T Thorpe
- Comparative Biomedical Sciences, The Royal Veterinary College, University of London, London, UK
| | - Jeffrey W Ruberti
- Department of Bioengineering, Northeastern University, Boston, MA, USA
| | - Brianne K Connizzo
- Department of Biomedical Engineering, Boston University, Boston, MA, USA.
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40
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FN1 promotes chondrocyte differentiation and collagen production via TGF-β/PI3K/Akt pathway in mice with femoral fracture. Gene 2020; 769:145253. [PMID: 33098939 DOI: 10.1016/j.gene.2020.145253] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Revised: 09/17/2020] [Accepted: 10/16/2020] [Indexed: 11/24/2022]
Abstract
Fibronectin (FN) functions as a potent stimulator of osteogenic differentiation, and bone fracture healing. In FN family, FN1 acts as an interactive protein gene product to mediate chondrocyte adhesion. However, its effect on fracture healing remains elusive. Therefore, we aimed to investigate the involvement of FN1 in fracture healing. Hard callus formations were found at fracture site with thicker periosteum in lateral cortical bone area outside the fracture site in model mice. The decreased number of osteogenic cells in the middle of the callus region and increased extracellular matrix were suggestive of successful induction. Immunoblotting and RT-qPCR revealed that expression of FN1 was increased in tissues of fracture mice. As displayed by Safranin-fast green staining hematoxylin-eosin staining, the overexpression of FN1 at fracture site promoted osteoid formation and chondrocyte differentiation. The stimulating role of FN1 in collagen production was evidenced by increased levels of Col2, Col1, ColX, Osteonectin, and Osteocalcin and enhanced BMD, BV, BV/TV and Tb.Th values verified by immunoblotting and immunohistochemical staining. Additionally, the upregulation of FN1 contributed to promoted TGF-β, c-Caspase-9/t-Caspase-9 ratio and NF-κB p65 protein expression as well as lowered p-PI3K/PI3K and p-AKT/AKT ratios, implying the positive correlation between FN1 and the TGF-β/PI3K/Akt signaling pathway. The key findings of the present study provided evidence indicating that overexpression of FN1 contributes to fracture healing by activation of the TGF-β/PI3K/Akt signaling pathway.
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41
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Fang F, Schwartz AG, Moore ER, Sup ME, Thomopoulos S. Primary cilia as the nexus of biophysical and hedgehog signaling at the tendon enthesis. SCIENCE ADVANCES 2020; 6:6/44/eabc1799. [PMID: 33127677 PMCID: PMC7608799 DOI: 10.1126/sciadv.abc1799] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Accepted: 09/17/2020] [Indexed: 05/10/2023]
Abstract
The tendon enthesis is a fibrocartilaginous tissue critical for transfer of muscle forces to bone. Enthesis pathologies are common, and surgical repair of tendon to bone is plagued by high failure rates. At the root of these failures is a gap in knowledge of how the tendon enthesis is formed and maintained. We tested the hypothesis that the primary cilium is a hub for transducing biophysical and hedgehog (Hh) signals to regulate tendon enthesis formation and adaptation to loading. Primary cilia were necessary for enthesis development, and cilia assembly was coincident with Hh signaling and enthesis mineralization. Cilia responded inversely to loading; increased loading led to decreased cilia and decreased loading led to increased cilia. Enthesis responses to loading were dependent on Hh signaling through cilia. Results imply a role for tendon enthesis primary cilia as mechanical responders and Hh signal transducers, providing a therapeutic target for tendon enthesis pathologies.
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Affiliation(s)
- Fei Fang
- Department of Orthopedic Surgery, Columbia University, New York, NY, 10032, USA
| | - Andrea G Schwartz
- Department of Orthopedic Surgery, Washington University in St. Louis, St. Louis, MO, 63130, USA
| | - Emily R Moore
- School of Dental Medicine, Harvard University, Cambridge, MA, 02138, USA
| | - McKenzie E Sup
- Department of Orthopedic Surgery, Columbia University, New York, NY, 10032, USA
- Department of Biomedical Engineering, Columbia University, New York, NY 10027, USA
| | - Stavros Thomopoulos
- Department of Orthopedic Surgery, Columbia University, New York, NY, 10032, USA.
- Department of Biomedical Engineering, Columbia University, New York, NY 10027, USA
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42
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Shen H, Schwartz AG, Civitelli R, Thomopoulos S. Connexin 43 Is Necessary for Murine Tendon Enthesis Formation and Response to Loading. J Bone Miner Res 2020; 35:1494-1503. [PMID: 32227614 PMCID: PMC7725385 DOI: 10.1002/jbmr.4018] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/11/2019] [Revised: 03/08/2020] [Accepted: 03/21/2020] [Indexed: 12/28/2022]
Abstract
The enthesis is a mineralized fibrocartilage transition that attaches tendon to bone and is vital for musculoskeletal function. Despite recent studies demonstrating the necessity of muscle loading for enthesis formation, the mechanisms that regulate enthesis formation and mechanoresponsiveness remain unclear. Therefore, the current study investigated the role of the gap junction protein connexin 43 in these processes by deleting Gja1 (the Cx43 gene) in the tendon and enthesis. Compared with their wild-type (WT) counterparts, mice lacking Cx43 showed disrupted entheseal cell alignment, reduced mineralized fibrocartilage, and impaired biomechanical properties of the supraspinatus tendon entheses during postnatal development. Cx43-deficient mice also exhibited reduced ability to complete a treadmill running protocol but no apparent deficits in daily activity, metabolic indexes, shoulder muscle size, grip strength, and major trabecular bone properties of the adjacent humeral head. To examine enthesis mechanoresponsiveness, young adult mice were subjected to modest treadmill exercise. Gja1 deficiency in the tendon and enthesis reduced entheseal anabolic responses to treadmill exercise: WT mice had increased expression of Sox9, Ihh, and Gli1 and increased Brdu incorporation, whereas Cx43-deficient mice showed no changes or decreased levels with exercise. Collectively, the results demonstrated an essential role for Cx43 in postnatal tendon enthesis formation, function, and response to loading; results further provided evidence implicating a link between Cx43 function and the hedgehog signaling pathway. © 2020 American Society for Bone and Mineral Research.
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Affiliation(s)
- Hua Shen
- Department of Orthopaedic Surgery, Washington University, St. Louis, MO, USA
| | - Andrea G Schwartz
- Department of Orthopaedic Surgery, Washington University, St. Louis, MO, USA
| | - Roberto Civitelli
- Department of Internal Medicine, Division of Bone and Mineral Disease, Washington University, St. Louis, MO, USA
| | - Stavros Thomopoulos
- Department of Orthopedic Surgery, Columbia University, New York, NY, USA.,Department of Biomedical Engineering, Columbia University, New York, NY, USA
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43
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Friese N, Gierschner MB, Schadzek P, Roger Y, Hoffmann A. Regeneration of Damaged Tendon-Bone Junctions (Entheses)-TAK1 as a Potential Node Factor. Int J Mol Sci 2020; 21:E5177. [PMID: 32707785 PMCID: PMC7432881 DOI: 10.3390/ijms21155177] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Revised: 07/10/2020] [Accepted: 07/20/2020] [Indexed: 12/20/2022] Open
Abstract
Musculoskeletal dysfunctions are highly prevalent due to increasing life expectancy. Consequently, novel solutions to optimize treatment of patients are required. The current major research focus is to develop innovative concepts for single tissues. However, interest is also emerging to generate applications for tissue transitions where highly divergent properties need to work together, as in bone-cartilage or bone-tendon transitions. Finding medical solutions for dysfunctions of such tissue transitions presents an added challenge, both in research and in clinics. This review aims to provide an overview of the anatomical structure of healthy adult entheses and their development during embryogenesis. Subsequently, important scientific progress in restoration of damaged entheses is presented. With respect to enthesis dysfunction, the review further focuses on inflammation. Although molecular, cellular and tissue mechanisms during inflammation are well understood, tissue regeneration in context of inflammation still presents an unmet clinical need and goes along with unresolved biological questions. Furthermore, this review gives particular attention to the potential role of a signaling mediator protein, transforming growth factor beta-activated kinase-1 (TAK1), which is at the node of regenerative and inflammatory signaling and is one example for a less regarded aspect and potential important link between tissue regeneration and inflammation.
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Affiliation(s)
- Nina Friese
- Department of Orthopedic Surgery, Graded Implants and Regenerative Strategies, OE 8893, Laboratory for Biomechanics and Biomaterials, Hannover Medical School (MHH), 30625 Hannover, Germany; (N.F.); (M.B.G.); (P.S.); (Y.R.)
- Lower Saxony Centre for Biomedical Engineering, Implant Research and Development (NIFE), 30625 Hannover, Germany
| | - Mattis Benno Gierschner
- Department of Orthopedic Surgery, Graded Implants and Regenerative Strategies, OE 8893, Laboratory for Biomechanics and Biomaterials, Hannover Medical School (MHH), 30625 Hannover, Germany; (N.F.); (M.B.G.); (P.S.); (Y.R.)
- Lower Saxony Centre for Biomedical Engineering, Implant Research and Development (NIFE), 30625 Hannover, Germany
| | - Patrik Schadzek
- Department of Orthopedic Surgery, Graded Implants and Regenerative Strategies, OE 8893, Laboratory for Biomechanics and Biomaterials, Hannover Medical School (MHH), 30625 Hannover, Germany; (N.F.); (M.B.G.); (P.S.); (Y.R.)
- Lower Saxony Centre for Biomedical Engineering, Implant Research and Development (NIFE), 30625 Hannover, Germany
| | - Yvonne Roger
- Department of Orthopedic Surgery, Graded Implants and Regenerative Strategies, OE 8893, Laboratory for Biomechanics and Biomaterials, Hannover Medical School (MHH), 30625 Hannover, Germany; (N.F.); (M.B.G.); (P.S.); (Y.R.)
- Lower Saxony Centre for Biomedical Engineering, Implant Research and Development (NIFE), 30625 Hannover, Germany
| | - Andrea Hoffmann
- Department of Orthopedic Surgery, Graded Implants and Regenerative Strategies, OE 8893, Laboratory for Biomechanics and Biomaterials, Hannover Medical School (MHH), 30625 Hannover, Germany; (N.F.); (M.B.G.); (P.S.); (Y.R.)
- Lower Saxony Centre for Biomedical Engineering, Implant Research and Development (NIFE), 30625 Hannover, Germany
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44
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Hagiwara Y, Dyrna F, Kuntz AF, Adams DJ, Dyment NA. Cells from a GDF5 origin produce zonal tendon-to-bone attachments following anterior cruciate ligament reconstruction. Ann N Y Acad Sci 2020; 1460:57-67. [PMID: 31596513 PMCID: PMC6992521 DOI: 10.1111/nyas.14250] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Revised: 09/01/2019] [Accepted: 09/15/2019] [Indexed: 01/14/2023]
Abstract
Following anterior cruciate ligament (ACL) reconstruction surgery, a staged repair response occurs where cells from outside the tendon graft participate in tunnel integration. The mechanisms that regulate this process, including the specific cellular origin, are poorly understood. Embryonic cells expressing growth and differentiation factor 5 (GDF5) give rise to several mesenchymal tissues in the joint and epiphyses. We hypothesized that cells from a GDF5 origin, even in the adult tissue, would give rise to cells that contribute to the stages of repair. ACLs were reconstructed in Gdf5-Cre;R26R-tdTomato lineage tracing mice to monitor the contribution of Gdf5-Cre;tdTom+ cells to the tunnel integration process. Anterior-posterior drawer tests demonstrated 58% restoration in anterior-posterior stability. Gdf5-Cre;tdTom+ cells within the epiphyseal bone marrow adjacent to tunnels expanded in response to the injury by 135-fold compared with intact controls to initiate tendon-to-bone attachments. They continued to mature the attachments yielding zonal insertion sites at 4 weeks with collagen fibers spanning across unmineralized and mineralized fibrocartilage and anchored to the adjacent bone. The zonal attachments possessed tidemarks with concentrated alkaline phosphatase activity similar to native entheses. This study established that mesenchymal cells from a GDF5 origin can contribute to zonal tendon-to-bone attachments within bone tunnels following ACL reconstruction.
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Affiliation(s)
- Yusuke Hagiwara
- Department of Orthopaedic Surgery, Inada Hospital, Nara Prefecture, Japan
- Department of Orthopaedic Surgery, Nara Medical University, Nara Prefecture, Japan
| | - Felix Dyrna
- Department of Trauma, Hand, and Reconstructive Surgery, University Hospital Münster, Münster, Germany
| | - Andrew F Kuntz
- McKay Orthopaedic Research Laboratory, Department of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Douglas J Adams
- Department of Orthopedics, University of Colorado Anschutz Medical Campus, Aurora, Colorado
- Department of Reconstructive Sciences, UConn Health, Farmington, Connecticut
| | - Nathaniel A Dyment
- McKay Orthopaedic Research Laboratory, Department of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, Pennsylvania
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45
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Kamalitdinov TB, Fujino K, Shetye SS, Jiang X, Ye Y, Rodriguez AB, Kuntz AF, Zgonis MH, Dyment NA. Amplifying Bone Marrow Progenitors Expressing α-Smooth Muscle Actin Produce Zonal Insertion Sites During Tendon-to-Bone Repair. J Orthop Res 2020; 38:105-116. [PMID: 31228280 PMCID: PMC6917878 DOI: 10.1002/jor.24395] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/31/2019] [Accepted: 06/06/2019] [Indexed: 02/04/2023]
Abstract
Traditional tendon-to-bone repair where the tendon is reattached to bone via suture anchors often results in disorganized scar production rather than the formation of a zonal insertion. In contrast, ligament reconstructions where tendon grafts are passed through bone tunnels can yield zonal tendon-to-bone attachments between the graft and adjacent bone. Therefore, ligament reconstructions can be used to study mechanisms that regulate zonal tendon-to-bone repair in the adult. Anterior cruciate ligament (ACL) reconstructions are one of the most common reconstruction procedures and while we know that cells from outside the graft produce the attachments, we have not yet established specific cell populations that give rise to this tissue. To address this knowledge gap, we performed ACL reconstructions in lineage tracing mice where α-smooth muscle actin (αSMACreERT2) was used to label αSMA-expressing progenitors within the bone marrow that produced zonal attachments. Expression of αSMA was increased during early stages of the repair process such that the contribution of SMA-labeled cells to the tunnel integration was highest when tamoxifen was delivered in the first week post-surgery. The zonal attachments shared features with normal entheses, including tidemarks oriented perpendicularly to collagen fibers, Col1a1-expressing cells, alkaline phosphatase activity, and proteoglycan-rich staining. Finally, the integration strength increased with time, requiring 112% greater force to remove the graft from the tunnel at 28 days compared with 14 days post-surgery. Future studies will target these progenitor cells to define the pathways that regulate zonal tendon-to-bone repair in the adult. © 2019 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 38:105-116, 2020.
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Affiliation(s)
- Timur B. Kamalitdinov
- McKay Orthopaedic Research Laboratory, Department of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, PA, USA
| | - Keitaro Fujino
- McKay Orthopaedic Research Laboratory, Department of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, PA, USA,Department of Orthopedic Surgery, Osaka Medical College, Osaka, Japan
| | - Snehal S. Shetye
- McKay Orthopaedic Research Laboratory, Department of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, PA, USA
| | - Xi Jiang
- McKay Orthopaedic Research Laboratory, Department of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, PA, USA
| | - Yaping Ye
- McKay Orthopaedic Research Laboratory, Department of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, PA, USA
| | - Ashley B. Rodriguez
- McKay Orthopaedic Research Laboratory, Department of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, PA, USA
| | - Andrew F. Kuntz
- McKay Orthopaedic Research Laboratory, Department of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, PA, USA
| | - Miltiadis H. Zgonis
- McKay Orthopaedic Research Laboratory, Department of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, PA, USA
| | - Nathaniel A. Dyment
- McKay Orthopaedic Research Laboratory, Department of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, PA, USA
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46
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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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47
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A Tppp3 +Pdgfra + tendon stem cell population contributes to regeneration and reveals a shared role for PDGF signalling in regeneration and fibrosis. Nat Cell Biol 2019; 21:1490-1503. [PMID: 31768046 PMCID: PMC6895435 DOI: 10.1038/s41556-019-0417-z] [Citation(s) in RCA: 122] [Impact Index Per Article: 24.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2018] [Accepted: 09/27/2019] [Indexed: 12/27/2022]
Abstract
Tendon injuries cause prolonged disability and never recover completely. Current mechanistic understanding of tendon regeneration is limited. Here we use single cell transcriptomics to identify a tubulin polymerization-promoting protein family member 3-expressing (Tppp3+) cell population as potential tendon stem cells. Through inducible lineage tracing, we demonstrated that these cells can generate new tenocytes and self-renew upon injury. A fraction of Tppp3+ cells expresses platelet-derived growth factor receptor alpha (Pdfgra). Ectopic platelet-derived growth factor-AA (PDGF-AA) protein induces new tenocyte production while inactivation of Pdgfra in Tppp3+ cells blocks tendon regeneration. These results support Tppp3+Pdgfra+ cells as tendon stem cells. Unexpectedly, Tppp3−Pdgfra+ fibro-adipogenic progenitors coexist in tendon stem cell niche and give rise to fibrotic cells, revealing a clandestine origin of fibrotic scars in healing tendons. Our results explain why fibrosis occurs in injured tendons and present clinical challenges to enhance tendon regeneration without a concurrent increase in fibrosis by PDGF application.
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48
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Tarafder S, Brito JA, Minhas S, Effiong L, Thomopoulos S, Lee CH. In situ tissue engineering of the tendon-to-bone interface by endogenous stem/progenitor cells. Biofabrication 2019; 12:015008. [PMID: 31561236 PMCID: PMC6904927 DOI: 10.1088/1758-5090/ab48ca] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The long-term success of surgical repair of rotator cuff tears is largely dependent on restoration of a functional tendon-to-bone interface. We implemented micro-precise spatiotemporal delivery of growth factors in three-dimensional printed scaffolds for integrative regeneration of a fibrocartilaginous tendon-to-bone interface. Sustained and spatially controlled release of tenogenic, chondrogenic and osteogenic growth factors was achieved using microsphere-based delivery carriers embedded in thin membrane-like scaffolds. In vitro, the scaffolds embedded with spatiotemporal delivery of growth factors successfully guided regional differentiation of mesenchymal progenitor cells, forming multiphase tissues with tendon-like, cartilage-like and bone-like regions. In vivo, when implanted at the interface between the supraspinatus tendon and the humeral head in a rat rotator cuff repair model, these scaffolds promoted recruitment of endogenous tendon progenitor cells followed by integrative healing of tendon and bone via re-formation of strong fibrocartilaginous interfaces. Our findings demonstrate the potential of in situ tissue engineering of tendon-to-bone interfaces by endogenous progenitor cells. The in situ tissue engineering approach shows translational potential for improving outcomes after rotator cuff repair.
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Affiliation(s)
- Solaiman Tarafder
- Regenerative Engineering Laboratory, Columbia University Medical Center, 630 W. 168th Street, VC12-230, NY 10032, New York
| | - John A Brito
- Regenerative Engineering Laboratory, Columbia University Medical Center, 630 W. 168th Street, VC12-230, NY 10032, New York
| | - Sumeet Minhas
- Regenerative Engineering Laboratory, Columbia University Medical Center, 630 W. 168th Street, VC12-230, NY 10032, New York
| | - Linda Effiong
- Department of Orthopedic Surgery, Columbia University Medical Center, 650 W. 168th Street, BB14-1408, NY 10032, New York
| | - Stavros Thomopoulos
- Department of Orthopedic Surgery, Columbia University Medical Center, 650 W. 168th Street, BB14-1408, NY 10032, New York
- Department of Biomedical Engineering, Columbia University, 351 Engineering Terrace, NY 10027, New York
| | - Chang H Lee
- Regenerative Engineering Laboratory, Columbia University Medical Center, 630 W. 168th Street, VC12-230, NY 10032, New York
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49
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Roberts RR, Bobzin L, Teng CS, Pal D, Tuzon CT, Schweitzer R, Merrill AE. FGF signaling patterns cell fate at the interface between tendon and bone. Development 2019; 146:dev.170241. [PMID: 31320326 DOI: 10.1242/dev.170241] [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: 07/26/2018] [Accepted: 06/21/2019] [Indexed: 12/17/2022]
Abstract
Tendon and bone are attached by a transitional connective tissue that is morphologically graded from tendinous to osseous and develops from bipotent progenitors that co-express scleraxis (Scx) and Sox9 (Scx+/Sox9+). Scx+/Sox9+ progenitors have the potential to differentiate into either tenocytes or chondrocytes, yet the developmental mechanism that spatially resolves their bipotency at the tendon-bone interface during embryogenesis remains unknown. Here, we demonstrate that development of Scx+/Sox9+ progenitors within the mammalian lower jaw requires FGF signaling. We find that loss of Fgfr2 in the mouse tendon-bone interface reduces Scx expression in Scx+/Sox9+ progenitors and induces their biased differentiation into Sox9+ chondrocytes. This expansion of Sox9+ chondrocytes, which is concomitant with decreased Notch2-Dll1 signaling, prevents formation of a mixed population of chondrocytes and tenocytes, and instead results in ectopic endochondral bone at tendon-bone attachment units. Our work shows that FGF signaling directs zonal patterning at the boundary between tendon and bone by regulating cell fate decisions through a mechanism that employs Notch signaling.
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Affiliation(s)
- Ryan R Roberts
- Center for Craniofacial Molecular Biology, Ostrow School of Dentistry, University of Southern California, Los Angeles, CA 90033, USA.,Department of Biochemistry and Molecular Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA
| | - Lauren Bobzin
- Center for Craniofacial Molecular Biology, Ostrow School of Dentistry, University of Southern California, Los Angeles, CA 90033, USA.,Department of Biochemistry and Molecular Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA
| | - Camilla S Teng
- Department of Biochemistry and Molecular Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA.,Department of Stem Cell Biology and Regenerative Medicine, Keck School of Medicine, University of Southern California, CA 90033, USA
| | - Deepanwita Pal
- Research Division, Shriners Hospital for Children, Oregon Health & Science University, Portland, OR 97239, USA
| | - Creighton T Tuzon
- Center for Craniofacial Molecular Biology, Ostrow School of Dentistry, University of Southern California, Los Angeles, CA 90033, USA.,Department of Biochemistry and Molecular Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA
| | - Ronen Schweitzer
- Research Division, Shriners Hospital for Children, Oregon Health & Science University, Portland, OR 97239, USA
| | - Amy E Merrill
- Center for Craniofacial Molecular Biology, Ostrow School of Dentistry, University of Southern California, Los Angeles, CA 90033, USA .,Department of Biochemistry and Molecular Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA
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McBeath R, Edwards RW, O’Hara BJ, Maltenfort MG, Parks SM, Steplewski A, Osterman AL, Shapiro IM. Tendinosis develops from age- and oxygen tension-dependent modulation of Rac1 activity. Aging Cell 2019; 18:e12934. [PMID: 30938056 PMCID: PMC6516173 DOI: 10.1111/acel.12934] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2018] [Revised: 01/16/2019] [Accepted: 02/07/2019] [Indexed: 12/20/2022] Open
Abstract
Age‐related tendon degeneration (tendinosis) is characterized by a phenotypic change in which tenocytes display characteristics of fibrochondrocytes and mineralized fibrochondrocytes. As tendon degeneration has been noted in vivo in areas of decreased tendon vascularity, we hypothesized that hypoxia is responsible for the development of the tendinosis phenotype, and that these effects are more pronounced in aged tenocytes. Hypoxic (1% O2) culture of aged, tendinotic, and young human tenocytes resulted in a mineralized fibrochondrocyte phenotype in aged tenocytes, and a fibrochondrocyte phenotype in young and tendinotic tenocytes. Investigation of the molecular mechanism responsible for this phenotype change revealed that the fibrochondrocyte phenotype in aged tenocytes occurs with decreased Rac1 activity in response to hypoxia. In young hypoxic tenocytes, however, the fibrochondrocyte phenotype occurs with concomitant decreased Rac1 activity coupled with increased RhoA activity. Using pharmacologic and adenoviral manipulation, we confirmed that these hypoxic effects on the tenocyte phenotype are linked directly to the activity of RhoA/Rac1 GTPase in in vitro human cell culture and tendon explants. These results demonstrate that hypoxia drives tenocyte phenotypic changes, and provide a molecular insight into the development of human tendinosis that occurs with aging.
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Affiliation(s)
- Rowena McBeath
- Department of Orthopaedic SurgeryThomas Jefferson UniversityPhiladelphiaPennsylvania
- Division of Orthopaedic Research, Department of Orthopaedic SurgeryThomas Jefferson UniversityPhiladelphiaPennsylvania
- Philadelphia Hand to Shoulder CenterPhiladelphiaPennsylvania
| | - Richard W. Edwards
- Division of Orthopaedic Research, Department of Orthopaedic SurgeryThomas Jefferson UniversityPhiladelphiaPennsylvania
| | - Brian J. O’Hara
- Department of Pathology, Anatomy and Cell BiologyThomas Jefferson University HospitalPhiladelphiaPennsylvania
| | - Mitchell G. Maltenfort
- The Applied Clinical Research Center, Department of Biomedical and Health InformaticsChildren's Hospital of PhiladelphiaPhiladelphiaPennsylvania
| | - Susan M. Parks
- Division of Geriatric Medicine & Palliative Care, Department of Family & Community MedicineThomas Jefferson UniversityPhiladelphiaPennsylvania
| | - Andrzej Steplewski
- Division of Orthopaedic Research, Department of Orthopaedic SurgeryThomas Jefferson UniversityPhiladelphiaPennsylvania
| | - A. Lee Osterman
- Department of Orthopaedic SurgeryThomas Jefferson UniversityPhiladelphiaPennsylvania
- Philadelphia Hand to Shoulder CenterPhiladelphiaPennsylvania
| | - Irving M. Shapiro
- Division of Orthopaedic Research, Department of Orthopaedic SurgeryThomas Jefferson UniversityPhiladelphiaPennsylvania
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