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Liang C, Fan Z, Zhang Z, Wang P, Deng H, Tao J. Electrospinning technology: a promising approach for tendon-bone interface tissue engineering. RSC Adv 2024; 14:26077-26090. [PMID: 39161449 PMCID: PMC11332360 DOI: 10.1039/d4ra04043k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2024] [Accepted: 07/29/2024] [Indexed: 08/21/2024] Open
Abstract
The regeneration of tendon-bone interface tissue has become a topic of great interest in recent years. However, the complex nature of this interface has posed challenges in finding suitable solutions. Tissue engineering, with its potential to improve clinical outcomes and play a crucial role in musculoskeletal function, has been increasingly explored for tendon-bone interface regeneration. This review focuses on the research advancements of electrospinning technology in interface tissue engineering. By utilizing electrospinning, researchers have been able to fabricate scaffolds with tailored properties to promote the regeneration and integration of tendon and bone tissues. The review discusses the unique structure and function of the tendon-bone interface, the mechanisms involved in its healing, and the limitations currently faced in achieving successful regeneration. Additionally, it highlights the potential of electrospinning technology in scaffold fabrication and its role in facilitating the development of functional and integrated tendon-bone interface tissues. Overall, this review provides valuable insights into the application of electrospinning technology for tendon-bone interface tissue engineering, emphasizing its significance in addressing the challenges associated with regeneration in this complex interface.
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Affiliation(s)
- Chengzhi Liang
- Department of Orthopaedics, The Second Affiliated Hospital of Nanchang University Nanchang Jiangxi 330000 China
| | - Zaiwei Fan
- Department of Orthopaedics, The Second Affiliated Hospital of Nanchang University Nanchang Jiangxi 330000 China
| | - Zirui Zhang
- Department of Rehabilitation Medicine, The 960th Hospital of the Chinese People's Liberation Army Jinan 250000 China
| | - Pinkai Wang
- Department of Orthopaedics, The Second Affiliated Hospital of Nanchang University Nanchang Jiangxi 330000 China
| | - Hui Deng
- Department of Orthopaedics, The Second Affiliated Hospital of Nanchang University Nanchang Jiangxi 330000 China
| | - Jun Tao
- Department of Orthopaedics, The Second Affiliated Hospital of Nanchang University Nanchang Jiangxi 330000 China
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Bonello JP, Tse MY, Robinson TJG, Bardana DD, Waldman SD, Pang SC. Expression of Chondrogenic Potential Markers in Cultured Chondrocytes from the Human Knee Joint. Cartilage 2024:19476035241241930. [PMID: 38616342 DOI: 10.1177/19476035241241930] [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] [Indexed: 04/16/2024] Open
Abstract
OBJECTIVES While substantial progress has been made in engineering cartilaginous constructs for animal models, further research is needed to translate these methodologies for human applications. Evidence suggests that cultured autologous chondrocytes undergo changes in phenotype and gene expression, thereby affecting their proliferation and differentiation capacity. This study was designed to evaluate the expression of chondrogenic markers in cultured human articular chondrocytes from passages 3 (P3) and 7 (P7), beyond the current clinical recommendation of P3. METHODS Cultured autologous chondrocytes were passaged from P3 up to P7, and quantitative polymerase chain reaction (qPCR) was used to assess mRNA expression of chondrogenic markers, including collagen type I (COLI), collagen type II (COLII), aggrecan (AGG), bone morphogenetic protein 4 (BMP4), transcription factor SOX-9 (SOX9), proteoglycan 4 (PGR4), and transformation-related protein 53 (p53), between P3 and P7. RESULTS Except for AGG, no significant differences were found in the expression of markers between passages, suggesting the maintenance of chondrogenic potential in cultured chondrocytes. Differential expression identified between SOX9 and PGR4, as well as between COLI and SOX9, indicates that differences in chondrogenic markers are present between age groups and sexes, respectively. CONCLUSIONS Overall, expression profiles of younger and male chondrocytes exhibit conversion of mature cartilage characteristics compared to their counterparts, with signs of dedifferentiation and loss of phenotype within-group passaging. These results may have implications in guiding the use of higher passaged chondrocytes for engineering constructs and provide a foundation for clinical recommendations surrounding the repair and treatment of articular cartilage pathology in both sexes.
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Affiliation(s)
- John-Peter Bonello
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, ON, Canada
| | - M Yat Tse
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, ON, Canada
| | - Trevor J G Robinson
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, ON, Canada
| | - Davide D Bardana
- Division of Surgery, Kingston General Hospital, Kingston, ON, Canada
| | - Stephen D Waldman
- Department of Chemical Engineering, Toronto Metropolitan University, Toronto, ON, Canada
| | - Stephen C Pang
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, ON, Canada
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Xu L, Li Y, Mei L, Qi H, Fang J, Li Y. Local injection of abaloparatide promotes mandibular condyle lengthening in adolescent rats via enhancing chondrogenesis and ossification. J Oral Rehabil 2024; 51:380-393. [PMID: 37727017 DOI: 10.1111/joor.13597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 04/16/2023] [Accepted: 09/07/2023] [Indexed: 09/21/2023]
Abstract
BACKGROUND Mandibular condylar hypoplasia negatively affects patient's facial appearance and dentofacial function. OBJECTIVE To investigate the effect of local injection of the drug abaloparatide (ABL), an analogue of parathyroid hormone related protein (PTHrP), on promoting lengthening of the mandibular condyle. METHODS Thirty adolescent male Sprague-Dawley rats were randomly divided into two groups, which received the injection of ABL or normal saline (the control) every 3 days in the temporomandibular joint (TMJ) cavity. Cone-beam computed tomography and immunohistochemistry assays were performed at 2, 4 and 6 weeks since the injection. Mandibular condylar chondrocytes (MCC) and pre-osteoblasts were treated with ABL or PBS, followed by the CCK-8 detection, IC50, real-time PCR assay, Western Blot and immunofluorescence staining. RESULTS In vivo, compared with the control, the ABL group significantly increased the mandibular condylar process length (by 1.34 ± 0.59 mm at 6 weeks), the thickness of the cartilage layer, and enhanced the matrix synthesis. The ABL group had significant up-regulation of SOX 9, COL II, PTHrP and PTH1R, down-regulation of COL X in the cartilage, up-regulation of RUNX 2, and unchanged osteoclastogenesis in the subchondral bone. In vitro, the intra-TMJ injection of ABL promoted the MCC proliferation, with up-regulated expression of chondrogenic genes, and enhanced osteogenic differentiation of the pre-osteoblasts. CONCLUSIONS Intra-TMJ injection of abaloparatide promotes mandibular condyle lengthening in the adolescent rats via enhancing chondrogenesis in the mandibular condylar cartilage and ossification in the subchondral bone.
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Affiliation(s)
- Lin Xu
- State Key Laboratory of Oral Diseases, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
| | - Yuan Li
- State Key Laboratory of Oral Diseases, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
| | - Li Mei
- Discipline of Orthodontics, Department of Oral Sciences, Faculty of Dentistry, University of Otago, Dunedin, New Zealand
| | - Hexu Qi
- State Key Laboratory of Oral Diseases, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
| | - Jie Fang
- State Key Laboratory of Oral Diseases, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
| | - Yu Li
- State Key Laboratory of Oral Diseases, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
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Sun J, Yang N, Xu Z, Cheng H, Zhang X. A novel heterozygous mutation in PTHLH causing autosomal dominant brachydactyly type E complicated with short stature. Mol Genet Genomic Med 2024; 12:e2393. [PMID: 38407575 PMCID: PMC10844838 DOI: 10.1002/mgg3.2393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Revised: 01/17/2024] [Accepted: 01/24/2024] [Indexed: 02/27/2024] Open
Abstract
BACKGROUND Brachydactyly type E (BDE) is a general term characterized by variable shortening of metacarpals and metatarsals, with phalanges affected frequently. It can occur as an isolated form or part of syndromes and manifest a high degree of phenotypic variability. In this study, we have identified the clinical characteristics and pathogenic causes of a four-generation pedigree with 10 members affected by BDE and short stature. METHODS After the informed consent was signed, clinical data and peripheral blood samples were collected from available family members. Karyotype analysis, array-CGH, next-generation sequencing, and Sanger sequencing were employed to identity the pathogenic candidate gene. RESULTS No translocation or microdeletion/duplication was found in karyotype analysis and array-CGH; hence, a novel heterozygous mutation, c.146dupA. p.S50Vfs*22, was detected by next-generation sequencing in PTHLH gene, leading to a premature stop codon. Subsequently, the mutation was confirmed by Sanger sequencing and co-segregation analysis. CONCLUSION In this study, we described a novel heterozygous mutation (c.146dupA. p.S50Vfs*22) of gene PTHLH in a Chinese family. The mutation could induce a premature stop codon leading to a truncation of the protein. Our study broadened the mutation spectrum of PTHLH in BDE.
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Affiliation(s)
- Jian Sun
- Center for Reproduction and Genetics, NHC Key Laboratory of Male Reproduction and Genetics, Suzhou Municipal HospitalThe Affiliated Suzhou Hospital of Nanjing Medical UniversitySuzhouChina
| | - Nian Yang
- Department of PediatricsLinShu People's HospitalLinyiChina
| | - Zhengquan Xu
- Department of Orthopaedics, Suzhou Municipal HospitalThe Affiliated Suzhou Hospital of Nanjing Medical UniversitySuzhouChina
| | - Hongbo Cheng
- Center for Reproduction and Genetics, NHC Key Laboratory of Male Reproduction and Genetics, Suzhou Municipal HospitalThe Affiliated Suzhou Hospital of Nanjing Medical UniversitySuzhouChina
| | - Xiangxin Zhang
- Department of Orthopaedics, Suzhou Municipal HospitalThe Affiliated Suzhou Hospital of Nanjing Medical UniversitySuzhouChina
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Chen Y, Mehmood K, Chang YF, Tang Z, Li Y, Zhang H. The molecular mechanisms of glycosaminoglycan biosynthesis regulating chondrogenesis and endochondral ossification. Life Sci 2023; 335:122243. [PMID: 37949211 DOI: 10.1016/j.lfs.2023.122243] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Revised: 10/23/2023] [Accepted: 11/02/2023] [Indexed: 11/12/2023]
Abstract
Disorders of chondrocyte differentiation and endochondral osteogenesis are major underlying factors in skeletal developmental disorders, including tibial dysplasia (TD), osteoarthritis (OA), chondrodysplasia (ACH), and multiple epiphyseal dysplasia (MED). Understanding the cellular and molecular pathogenesis of these disorders is crucial for addressing orthopedic diseases resulting from impaired glycosaminoglycan synthesis. Glycosaminoglycan is a broad term that refers to the glycan component of proteoglycan macromolecules. It is an essential component of the cartilage extracellular matrix and plays a vital role in various biological processes, including gene transcription, signal transduction, and chondrocyte differentiation. Recent studies have demonstrated that glycosaminoglycan biosynthesis plays a regulatory role in chondrocyte differentiation and endochondral osteogenesis by modulating various growth factors and signaling molecules. For instance, glycosaminoglycan is involved in mediating pathways such as Wnt, TGF-β, FGF, Ihh-PTHrP, and O-GlcNAc glycosylation, interacting with transcription factors SOX9, BMPs, TGF-β, and Runx2 to regulate chondrocyte differentiation and endochondral osteogenesis. To propose innovative approaches for addressing orthopedic diseases caused by impaired glycosaminoglycan biosynthesis, we conducted a comprehensive review of the molecular mechanisms underlying chondrocyte glycosaminoglycan biosynthesis, which regulates chondrocyte differentiation and endochondral osteogenesis. Our analysis considers the role of genes, glycoproteins, and associated signaling pathways during chondrogenesis and endochondral ossification.
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Affiliation(s)
- Yongjian Chen
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China
| | - Khalid Mehmood
- Faculty of Veterinary and Animal Sciences, The Islamia University of Bahawalpur, 63100, Pakistan
| | - Yung-Fu Chang
- College of Veterinary Medicine, Cornell University, Ithaca, NY, USA
| | - Zhaoxin Tang
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China
| | - Ying Li
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China
| | - Hui Zhang
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China.
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Dong Y, Chen Y, Ma G, Cao H. The role of E3 ubiquitin ligases in bone homeostasis and related diseases. Acta Pharm Sin B 2023; 13:3963-3987. [PMID: 37799379 PMCID: PMC10547920 DOI: 10.1016/j.apsb.2023.06.016] [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: 02/09/2022] [Revised: 05/16/2023] [Accepted: 05/18/2023] [Indexed: 10/07/2023] Open
Abstract
The ubiquitin-proteasome system (UPS) dedicates to degrade intracellular proteins to modulate demic homeostasis and functions of organisms. These enzymatic cascades mark and modifies target proteins diversly through covalently binding ubiquitin molecules. In the UPS, E3 ubiquitin ligases are the crucial constituents by the advantage of recognizing and presenting proteins to proteasomes for proteolysis. As the major regulators of protein homeostasis, E3 ligases are indispensable to proper cell manners in diverse systems, and they are well described in physiological bone growth and bone metabolism. Pathologically, classic bone-related diseases such as metabolic bone diseases, arthritis, bone neoplasms and bone metastasis of the tumor, etc., were also depicted in a UPS-dependent manner. Therefore, skeletal system is versatilely regulated by UPS and it is worthy to summarize the underlying mechanism. Furthermore, based on the current status of treatment, normal or pathological osteogenesis and tumorigenesis elaborated in this review highlight the clinical significance of UPS research. As a strategy possibly remedies the limitations of UPS treatment, emerging PROTAC was described comprehensively to illustrate its potential in clinical application. Altogether, the purpose of this review aims to provide more evidence for exploiting novel therapeutic strategies based on UPS for bone associated diseases.
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Affiliation(s)
| | | | - Guixing Ma
- Department of Biochemistry, School of Medicine, Southern University of Science and Technology, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Key University Laboratory of Metabolism and Health of Guangdong, Shenzhen 518055, China
| | - Huiling Cao
- Department of Biochemistry, School of Medicine, Southern University of Science and Technology, Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Key University Laboratory of Metabolism and Health of Guangdong, Shenzhen 518055, China
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Soto-Pedre E, Newey PJ, Srinivasan S, Siddiqui MK, Palmer CNA, Leese GP. Identification of 4 New Loci Associated With Primary Hyperparathyroidism (PHPT) and a Polygenic Risk Score for PHPT. J Clin Endocrinol Metab 2022; 107:3302-3308. [PMID: 36102151 PMCID: PMC9693767 DOI: 10.1210/clinem/dgac527] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Indexed: 12/30/2022]
Abstract
CONTEXT A hypothesis-free genetic association analysis has not been reported for patients with primary hyperparathyroidism (PHPT). OBJECTIVE We aimed to investigate genetic associations with PHPT using both genome-wide association study (GWAS) and candidate gene approaches. METHODS A cross-sectional study was conducted among patients of European White ethnicity recruited in Tayside (Scotland, UK). Electronic medical records were used to identify PHPT cases and controls, and linked to genetic biobank data. Genetic associations were performed by logistic regression models and odds ratios (ORs). The combined effect of the genotypes was researched by genetic risk score (GRS) analysis. RESULTS We identified 15 622 individuals for the GWAS that yielded 34 top single-nucleotide variations (formerly single-nucleotide polymorphisms), and LPAR3-rs147672681 reached genome-wide statistical significance (P = 1.2e-08). Using a more restricted PHPT definition, 8722 individuals with data on the GWAS-identified loci were found. Age- and sex-adjusted ORs for the effect alleles of SOX9-rs11656269, SLITRK5-rs185436526, and BCDIN3D-AS1-rs2045094 showed statistically significant increased risks (P < 1.5e-03). GRS analysis of 5482 individuals showed an OR of 2.51 (P = 1.6e-04), 3.78 (P = 4.0e-08), and 7.71 (P = 5.3e-17) for the second, third, and fourth quartiles, respectively, compared to the first, and there was a statistically significant linear trend across quartiles (P < 1.0e-04). Results were similar when stratifying by sex. CONCLUSION Using genetic loci discovered in a GWAS of PHPT carried out in a Scottish population, this study suggests new evidence for the involvement of genetic variants at SOX9, SLITRK5, LPAR3, and BCDIN3D-AS1. It also suggests that male and female carriers of greater numbers of PHPT-risk alleles both have a statistically significant increased risk of PHPT.
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Affiliation(s)
- Enrique Soto-Pedre
- Correspondence: Enrique Soto-Pedre, MBBS, MSc, MPH, Division of Population Health & Genomics, School of Medicine, Level 5, Mailbox 12, Ninewells Hospital and Medical School, University of Dundee, Dundee DD1 9SY, Scotland, UK.
| | - Paul J Newey
- Division of Population Health & Genomics, School of Medicine, Ninewells Hospital & Medical School, University of Dundee, Dundee DD1 9SY, UK
- Department of Endocrinology and Diabetes, Ninewells Hospital & Medical School, University of Dundee, Dundee DD1 9SY, UK
| | - Sundararajan Srinivasan
- Division of Population Health & Genomics, School of Medicine, Ninewells Hospital & Medical School, University of Dundee, Dundee DD1 9SY, UK
| | - Moneeza K Siddiqui
- Division of Population Health & Genomics, School of Medicine, Ninewells Hospital & Medical School, University of Dundee, Dundee DD1 9SY, UK
| | - Colin N A Palmer
- Division of Population Health & Genomics, School of Medicine, Ninewells Hospital & Medical School, University of Dundee, Dundee DD1 9SY, UK
- Centre for Pharmacogenetics and Pharmacogenomics, Ninewells Hospital & Medical School, University of Dundee, Dundee DD1 9SY, UK
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Kim P, Park J, Lee DJ, Mizuno S, Shinohara M, Hong CP, Jeong Y, Yun R, Park H, Park S, Yang KM, Lee MJ, Jang SP, Kim HY, Lee SJ, Song SU, Park KS, Tanaka M, Ohshima H, Cho JW, Sugiyama F, Takahashi S, Jung HS, Kim SJ. Mast4 determines the cell fate of MSCs for bone and cartilage development. Nat Commun 2022; 13:3960. [PMID: 35803931 PMCID: PMC9270402 DOI: 10.1038/s41467-022-31697-3] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Accepted: 06/28/2022] [Indexed: 11/26/2022] Open
Abstract
Mesenchymal stromal cells (MSCs) differentiation into different lineages is precisely controlled by signaling pathways. Given that protein kinases play a crucial role in signal transduction, here we show that Microtubule Associated Serine/Threonine Kinase Family Member 4 (Mast4) serves as an important mediator of TGF-β and Wnt signal transduction in regulating chondro-osteogenic differentiation of MSCs. Suppression of Mast4 by TGF-β1 led to increased Sox9 stability by blocking Mast4-induced Sox9 serine 494 phosphorylation and subsequent proteasomal degradation, ultimately enhancing chondrogenesis of MSCs. On the other hand, Mast4 protein, which stability was enhanced by Wnt-mediated inhibition of GSK-3β and subsequent Smurf1 recruitment, promoted β-catenin nuclear localization and Runx2 activity, increasing osteogenesis of MSCs. Consistently, Mast4-/- mice demonstrated excessive cartilage synthesis, while exhibiting osteoporotic phenotype. Interestingly, Mast4 depletion in MSCs facilitated cartilage formation and regeneration in vivo. Altogether, our findings uncover essential roles of Mast4 in determining the fate of MSC development into cartilage or bone.
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Affiliation(s)
- Pyunggang Kim
- GILO Institute, GILO Foundation, Seoul, 06668, Korea
- Department of Biomedical Science, College of Life Science, CHA University, Seongnam City, 463-400, Kyunggi-do, Korea
| | - Jinah Park
- GILO Institute, GILO Foundation, Seoul, 06668, Korea
- Amoris Bio Inc, Seoul, 06668, Korea
| | - Dong-Joon Lee
- Division in Anatomy and Developmental Biology, Department of Oral Biology, Taste Research Center, Oral Science Research Center, BK21 FOUR Project, Yonsei University College of Dentistry, Seoul, 03722, Korea
| | - Seiya Mizuno
- Laboratory Animal Resource Center, University of Tsukuba, Tsukuba, Ibaraki 305-8575, Japan
| | - Masahiro Shinohara
- Department of Rehabilitation for the Movement Functions, Research Institute, National Rehabilitation Center for Persons with Disabilities, Saitama, 359-8555, Japan
| | | | - Yealeen Jeong
- GILO Institute, GILO Foundation, Seoul, 06668, Korea
| | - Rebecca Yun
- GILO Institute, GILO Foundation, Seoul, 06668, Korea
| | - Hyeyeon Park
- GILO Institute, GILO Foundation, Seoul, 06668, Korea
| | - Sujin Park
- GILO Institute, GILO Foundation, Seoul, 06668, Korea
| | | | - Min-Jung Lee
- Division in Anatomy and Developmental Biology, Department of Oral Biology, Taste Research Center, Oral Science Research Center, BK21 FOUR Project, Yonsei University College of Dentistry, Seoul, 03722, Korea
| | | | - Hyun-Yi Kim
- Division in Anatomy and Developmental Biology, Department of Oral Biology, Taste Research Center, Oral Science Research Center, BK21 FOUR Project, Yonsei University College of Dentistry, Seoul, 03722, Korea
- NGeneS Inc., Ansan-si, 15495, Korea
| | - Seung-Jun Lee
- Division in Anatomy and Developmental Biology, Department of Oral Biology, Taste Research Center, Oral Science Research Center, BK21 FOUR Project, Yonsei University College of Dentistry, Seoul, 03722, Korea
| | - Sun U Song
- Research Institute, SCM Lifescience Inc., Incheon, Korea
- Department of Biomedical Sciences, Inha University College of Medicine, Incheon, Korea
| | - Kyung-Soon Park
- Department of Biomedical Science, College of Life Science, CHA University, Seongnam City, 463-400, Kyunggi-do, Korea
| | - Mikako Tanaka
- Division of Anatomy and Cell Biology of the Hard Tissue, Department of Tissue Regeneration and Reconstruction, Niigata University Graduate School of Medical and Dental Sciences, Niigata, 951-8514, Japan
- Division of Dental Laboratory Technology, Meirin College, Niigata, 950-2086, Japan
| | - Hayato Ohshima
- Division of Anatomy and Cell Biology of the Hard Tissue, Department of Tissue Regeneration and Reconstruction, Niigata University Graduate School of Medical and Dental Sciences, Niigata, 951-8514, Japan
| | - Jin Won Cho
- Department of Systems Biology and Glycosylation Network Research Center, Yonsei University, Seoul, Korea
| | - Fumihiro Sugiyama
- Laboratory Animal Resource Center, University of Tsukuba, Tsukuba, Ibaraki 305-8575, Japan
| | - Satoru Takahashi
- Laboratory Animal Resource Center, University of Tsukuba, Tsukuba, Ibaraki 305-8575, Japan
| | - Han-Sung Jung
- Division in Anatomy and Developmental Biology, Department of Oral Biology, Taste Research Center, Oral Science Research Center, BK21 FOUR Project, Yonsei University College of Dentistry, Seoul, 03722, Korea
| | - Seong-Jin Kim
- GILO Institute, GILO Foundation, Seoul, 06668, Korea.
- Medpacto Inc., Seoul, 06668, Korea.
- TheragenEtex Co., Gyeonggi-do, Korea.
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Caetano-Silva S, Simbi BH, Marr N, Hibbert A, Allen SP, Pitsillides AA. Restraint upon Embryonic Metatarsal Ex Vivo Growth by Hydrogel Reveals Interaction between Quasi-Static Load and the mTOR Pathway. Int J Mol Sci 2021; 22:ijms222413220. [PMID: 34948015 PMCID: PMC8706285 DOI: 10.3390/ijms222413220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 12/01/2021] [Accepted: 12/02/2021] [Indexed: 11/23/2022] Open
Abstract
Mechanical cues play a vital role in limb skeletal development, yet their influence and underpinning mechanisms in the regulation of endochondral ossification (EO) processes are incompletely defined. Furthermore, interactions between endochondral growth and mechanics and the mTOR/NF-ĸB pathways are yet to be explored. An appreciation of how mechanical cues regulate EO would also clearly be beneficial in the context of fracture healing and bone diseases, where these processes are recapitulated. The study herein addresses the hypothesis that the mTOR/NF-ĸB pathways interact with mechanics to control endochondral growth. To test this, murine embryonic metatarsals were incubated ex vivo in a hydrogel, allowing for the effects of quasi-static loading on longitudinal growth to be assessed. The results showed significant restriction of metatarsal growth under quasi-static loading during a 14-day period and concentration-dependent sensitivity to hydrogel-related restriction. This study also showed that hydrogel-treated metatarsals retain their viability and do not present with increased apoptosis. Metatarsals exhibited reversal of the growth-restriction when co-incubated with mTOR compounds, whilst it was found that these compounds showed no effects under basal culture conditions. Transcriptional changes linked to endochondral growth were assessed and downregulation of Col2 and Acan was observed in hydrogel-treated metatarsi at day 7. Furthermore, cell cycle analyses confirmed the presence of chondrocytes exhibiting S-G2/M arrest. These data indicate that quasi-static load provokes chondrocyte cell cycle arrest, which is partly overcome by mTOR, with a less marked interaction for NF-ĸB regulators.
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Khurana S, Schivo S, Plass JRM, Mersinis N, Scholma J, Kerkhofs J, Zhong L, van de Pol J, Langerak R, Geris L, Karperien M, Post JN. An ECHO of Cartilage: In Silico Prediction of Combinatorial Treatments to Switch Between Transient and Permanent Cartilage Phenotypes With Ex Vivo Validation. Front Bioeng Biotechnol 2021; 9:732917. [PMID: 34869253 PMCID: PMC8634894 DOI: 10.3389/fbioe.2021.732917] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Accepted: 10/25/2021] [Indexed: 11/13/2022] Open
Abstract
A fundamental question in cartilage biology is: what determines the switch between permanent cartilage found in the articular joints and transient hypertrophic cartilage that functions as a template for bone? This switch is observed both in a subset of OA patients that develop osteophytes, as well as in cell-based tissue engineering strategies for joint repair. A thorough understanding of the mechanisms regulating cell fate provides opportunities for treatment of cartilage disease and tissue engineering strategies. The objective of this study was to understand the mechanisms that regulate the switch between permanent and transient cartilage using a computational model of chondrocytes, ECHO. To investigate large signaling networks that regulate cell fate decisions, we developed the software tool ANIMO, Analysis of Networks with interactive Modeling. In ANIMO, we generated an activity network integrating 7 signal transduction pathways resulting in a network containing over 50 proteins with 200 interactions. We called this model ECHO, for executable chondrocyte. Previously, we showed that ECHO could be used to characterize mechanisms of cell fate decisions. ECHO was first developed based on a Boolean model of growth plate. Here, we show how the growth plate Boolean model was translated to ANIMO and how we adapted the topology and parameters to generate an articular cartilage model. In ANIMO, many combinations of overactivation/knockout were tested that result in a switch between permanent cartilage (SOX9+) and transient, hypertrophic cartilage (RUNX2+). We used model checking to prioritize combination treatments for wet-lab validation. Three combinatorial treatments were chosen and tested on metatarsals from 1-day old rat pups that were treated for 6 days. We found that a combination of IGF1 with inhibition of ERK1/2 had a positive effect on cartilage formation and growth, whereas activation of DLX5 combined with inhibition of PKA had a negative effect on cartilage formation and growth and resulted in increased cartilage hypertrophy. We show that our model describes cartilage formation, and that model checking can aid in choosing and prioritizing combinatorial treatments that interfere with normal cartilage development. Here we show that combinatorial treatments induce changes in the zonal distribution of cartilage, indication possible switches in cell fate. This indicates that simulations in ECHO aid in describing pathologies in which switches between cell fates are observed, such as OA.
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Affiliation(s)
- Sakshi Khurana
- Technical Medicine Centre, Department of Developmental BioEngineering, University of Twente, Enschede, Netherlands
| | - Stefano Schivo
- Technical Medicine Centre, Department of Developmental BioEngineering, University of Twente, Enschede, Netherlands.,Department of Formal Methods and Tools, CTIT Institute, University of Twente, Enschede, Netherlands
| | - Jacqueline R M Plass
- Technical Medicine Centre, Department of Developmental BioEngineering, University of Twente, Enschede, Netherlands
| | - Nikolas Mersinis
- Technical Medicine Centre, Department of Developmental BioEngineering, University of Twente, Enschede, Netherlands
| | - Jetse Scholma
- Technical Medicine Centre, Department of Developmental BioEngineering, University of Twente, Enschede, Netherlands
| | - Johan Kerkhofs
- Biomechanics Research Unit, GIGA In Silico Medicine, ULiège, Liège, Belgium
| | - Leilei Zhong
- Technical Medicine Centre, Department of Developmental BioEngineering, University of Twente, Enschede, Netherlands
| | - Jaco van de Pol
- Department of Formal Methods and Tools, CTIT Institute, University of Twente, Enschede, Netherlands.,Dept. of Computer Science, Aarhus University, Aarhus, Denmark
| | - Rom Langerak
- Department of Formal Methods and Tools, CTIT Institute, University of Twente, Enschede, Netherlands
| | - Liesbet Geris
- Biomechanics Section, Department of Mechanical Engineering, KU Leuven, Leuven, Belgium
| | - Marcel Karperien
- Technical Medicine Centre, Department of Developmental BioEngineering, University of Twente, Enschede, Netherlands
| | - Janine N Post
- Technical Medicine Centre, Department of Developmental BioEngineering, University of Twente, Enschede, Netherlands
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11
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Renthal NE, Nakka P, Baronas JM, Kronenberg HM, Hirschhorn JN. Genes with specificity for expression in the round cell layer of the growth plate are enriched in genomewide association study (GWAS) of human height. J Bone Miner Res 2021; 36:2300-2308. [PMID: 34346115 PMCID: PMC10249375 DOI: 10.1002/jbmr.4408] [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: 02/09/2021] [Revised: 05/25/2021] [Accepted: 06/27/2021] [Indexed: 11/09/2022]
Abstract
Human adult height reflects the outcome of childhood skeletal growth. Growth plate (epiphyseal) chondrocytes are key determinants of height. As epiphyseal chondrocytes mature and proliferate, they pass through three developmental stages, which are organized into three distinct layers in the growth plate: (i) resting (round), (ii) proliferative (flat), and (iii) hypertrophic. Recent genomewide association studies (GWASs) of human height identified numerous associated loci, which are enriched for genes expressed in growth plate chondrocytes. However, it remains unclear which specific genes expressed in which layers of the growth plate regulate skeletal growth and human height. To connect the genetics of height and growth plate biology, we analyzed GWAS data through the lens of gene expression in the three dissected layers of murine newborn tibial growth plate. For each gene, we derived a specificity score for each growth plate layer and regressed these scores against gene-level p values from recent height GWAS data. We found that specificity for expression in the round cell layer, which contains chondrocytes early in maturation, is significantly associated with height GWAS p values (p = 8.5 × 10-9 ); this association remains after conditioning on specificity for the other cell layers. The association also remains after conditioning on membership in an "Online Mendelian Inheritance in Man (OMIM) gene set" (genes known to cause monogenic skeletal growth disorders, p < 9.7 × 10-6 ). We replicated the association in RNA-sequencing (RNA-seq) data from maturing chondrocytes sampled at early and late time points during differentiation in vitro: we found that expression early in differentiation is significantly associated with p values from height GWASs (p = 6.1 × 10-10 ) and that this association remains after conditioning on expression at 10 days in culture and on the OMIM gene set (p < 0.006). These findings newly implicate genes highlighted by GWASs of height and specifically expressed in the round cell layer as being potentially important regulators of skeletal biology. © 2021 American Society for Bone and Mineral Research (ASBMR).
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Affiliation(s)
- Nora E. Renthal
- Department of Pediatrics, Division of Endocrinology, Boston Children’s Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Priyanka Nakka
- Department of Pediatrics, Division of Endocrinology, Boston Children’s Hospital and Harvard Medical School, Boston, Massachusetts, USA
- Medical and Population Genetics, Broad Institute, Cambridge, Massachusetts, USA
| | - John M. Baronas
- Department of Pediatrics, Division of Endocrinology, Boston Children’s Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Henry M. Kronenberg
- Endocrine Unit, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Joel N. Hirschhorn
- Department of Pediatrics, Division of Endocrinology, Boston Children’s Hospital and Harvard Medical School, Boston, Massachusetts, USA
- Medical and Population Genetics, Broad Institute, Cambridge, Massachusetts, USA
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12
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Rajagopal K, Ramesh S, Madhuri V. Early Addition of Parathyroid Hormone-Related Peptide Regulates the Hypertrophic Differentiation of Mesenchymal Stem Cells. Cartilage 2021; 13:143S-152S. [PMID: 31896268 PMCID: PMC8804866 DOI: 10.1177/1947603519894727] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
OBJECTIVE Chondrogenic differentiation of mesenchymal stem cells (MSCs) into hyaline cartilage is complicated by terminal hypertrophic differentiation. In growth plate, parathyroid hormone-related peptide (1-34) (PTHrP) plays a crucial role in maintaining chondrocytes in their proliferation state by counteracting the hypertrophic differentiation. This study aims to test the effect of PTHrP supplementation at different time points on chondrogenic differentiation of MSCs and assess the final quality of differentiated chondrocytes. METHODS Human periosteum and bone marrow MSCs isolated from 3 patient samples (donor unmatched) were characterized by flow cytometry and multilineage differentiation. The cells were differentiated into chondrocytes in the presence of transforming growth factor-β (TGF-β) and the PTHrP (1-34) was added from 4th or 14th day of culture. The outcome was analyzed by histology, immunohistochemistry, and gene expression. RESULTS Flow cytometry and multilineage differentiation confirmed that the cells isolated from periosteum and bone marrow exhibited the phenotype of MSCs. During chondrogenic differentiation, pellets that received PTHrP from the 4th day of culture showed a significant reduction in hypertrophic markers (COL10A1 and RUNX) than the addition of PTHrP from the 14th day and TGF-β alone treated samples. Furthermore, 4th day supplementation of PTHrP significantly improved the expression of cartilage-specific markers (COL2A1, SOX9, ACAN) in both periosteum and bone marrow-derived MSCs. Histology and immunostaining with collagen type X data corroborated the gene expression outcomes. CONCLUSION The outcome showed that supplementing PTHrP from the 4th day of chondrogenic differentiation produced better chondrocytes with less hypertrophic markers in both bone marrow and periosteal-derived MSCs.
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Affiliation(s)
- Karthikeyan Rajagopal
- Centre for Stem Cell Research, a Unit of
InStem Bengaluru, Christian Medical College, Bagayam, Vellore, Tamil Nadu,
India,Department of Paediatric Orthopaedics,
Christian Medical College, Vellore, Tamil Nadu, India
| | - Sowmya Ramesh
- Centre for Stem Cell Research, a Unit of
InStem Bengaluru, Christian Medical College, Bagayam, Vellore, Tamil Nadu,
India,Department of Paediatric Orthopaedics,
Christian Medical College, Vellore, Tamil Nadu, India
| | - Vrisha Madhuri
- Centre for Stem Cell Research, a Unit of
InStem Bengaluru, Christian Medical College, Bagayam, Vellore, Tamil Nadu,
India,Department of Paediatric Orthopaedics,
Christian Medical College, Vellore, Tamil Nadu, India,Vrisha Madhuri, Professor, Department of
Paediatric Orthopaedics, Christian Medical College, First Floor, Paul Brand
Building, Vellore 632004, Tamil Nadu, India.
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13
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Liu Z, Hussien AA, Wang Y, Heckmann T, Gonzalez R, Karner CM, Snedeker JG, Gray RS. An adhesion G protein-coupled receptor is required in cartilaginous and dense connective tissues to maintain spine alignment. eLife 2021; 10:67781. [PMID: 34318745 PMCID: PMC8328515 DOI: 10.7554/elife.67781] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Accepted: 07/22/2021] [Indexed: 12/11/2022] Open
Abstract
Adolescent idiopathic scoliosis (AIS) is the most common spine disorder affecting children worldwide, yet little is known about the pathogenesis of this disorder. Here, we demonstrate that genetic regulation of structural components of the axial skeleton, the intervertebral discs, and dense connective tissues (i.e., ligaments and tendons) is essential for the maintenance of spinal alignment. We show that the adhesion G protein-coupled receptor ADGRG6, previously implicated in human AIS association studies, is required in these tissues to maintain typical spine alignment in mice. Furthermore, we show that ADGRG6 regulates biomechanical properties of tendon and stimulates CREB signaling governing gene expression in cartilaginous tissues of the spine. Treatment with a cAMP agonist could mirror aspects of receptor function in culture, thus defining core pathways for regulating these axial cartilaginous and connective tissues. As ADGRG6 is a key gene involved in human AIS, these findings open up novel therapeutic opportunities for human scoliosis.
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Affiliation(s)
- Zhaoyang Liu
- Department of Pediatrics, Dell Pediatric Research Institute, 1400 Barbara Jordan Blvd, The University of Texas at Austin, Dell Medical School, Austin, United States.,Department of Nutritional Sciences, The University of Texas at Austin, Austin, United States
| | - Amro A Hussien
- Department of Orthopedics, Balgrist University Hospital, University of Zurich, Zurich, Switzerland.,Institute for Biomechanics, ETH Zurich, Zurich, Switzerland
| | - Yunjia Wang
- Department of Pediatrics, Dell Pediatric Research Institute, 1400 Barbara Jordan Blvd, The University of Texas at Austin, Dell Medical School, Austin, United States.,Department of Spine Surgery and Orthopaedics, Xiangya Hospital, Central South University, Changsha, China
| | - Terry Heckmann
- Department of Pediatrics, Dell Pediatric Research Institute, 1400 Barbara Jordan Blvd, The University of Texas at Austin, Dell Medical School, Austin, United States
| | - Roberto Gonzalez
- Department of Pediatrics, Dell Pediatric Research Institute, 1400 Barbara Jordan Blvd, The University of Texas at Austin, Dell Medical School, Austin, United States
| | - Courtney M Karner
- Department of Internal Medicine, Charles and Jane Pak Center for Mineral Metabolism and Clinical Research, University of Texas Southwestern Medical Center, Dallas, United States
| | - Jess G Snedeker
- Department of Orthopedics, Balgrist University Hospital, University of Zurich, Zurich, Switzerland.,Institute for Biomechanics, ETH Zurich, Zurich, Switzerland
| | - Ryan S Gray
- Department of Pediatrics, Dell Pediatric Research Institute, 1400 Barbara Jordan Blvd, The University of Texas at Austin, Dell Medical School, Austin, United States.,Department of Nutritional Sciences, The University of Texas at Austin, Austin, United States
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14
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Guasto A, Cormier-Daire V. Signaling Pathways in Bone Development and Their Related Skeletal Dysplasia. Int J Mol Sci 2021; 22:4321. [PMID: 33919228 PMCID: PMC8122623 DOI: 10.3390/ijms22094321] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Revised: 04/12/2021] [Accepted: 04/19/2021] [Indexed: 12/19/2022] Open
Abstract
Bone development is a tightly regulated process. Several integrated signaling pathways including HH, PTHrP, WNT, NOTCH, TGF-β, BMP, FGF and the transcription factors SOX9, RUNX2 and OSX are essential for proper skeletal development. Misregulation of these signaling pathways can cause a large spectrum of congenital conditions categorized as skeletal dysplasia. Since the signaling pathways involved in skeletal dysplasia interact at multiple levels and have a different role depending on the time of action (early or late in chondrogenesis and osteoblastogenesis), it is still difficult to precisely explain the physiopathological mechanisms of skeletal disorders. However, in recent years, significant progress has been made in elucidating the mechanisms of these signaling pathways and genotype-phenotype correlations have helped to elucidate their role in skeletogenesis. Here, we review the principal signaling pathways involved in bone development and their associated skeletal dysplasia.
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Affiliation(s)
- Alessandra Guasto
- Imagine Institute, Université de Paris, Clinical Genetics, INSERM UMR 1163, Necker Enfants Malades Hospital, 75015 Paris, France;
| | - Valérie Cormier-Daire
- Imagine Institute, Université de Paris, Clinical Genetics, INSERM UMR 1163, Necker Enfants Malades Hospital, 75015 Paris, France;
- Centre de Référence Pour Les Maladies Osseuses Constitutionnelles, Service de Génétique Clinique, AP-HP, Hôpital Necker-Enfants Malades, 75015 Paris, France
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15
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Articular Chondrocyte Phenotype Regulation through the Cytoskeleton and the Signaling Processes That Originate from or Converge on the Cytoskeleton: Towards a Novel Understanding of the Intersection between Actin Dynamics and Chondrogenic Function. Int J Mol Sci 2021; 22:ijms22063279. [PMID: 33807043 PMCID: PMC8004672 DOI: 10.3390/ijms22063279] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Revised: 03/16/2021] [Accepted: 03/17/2021] [Indexed: 02/08/2023] Open
Abstract
Numerous studies have assembled a complex picture, in which extracellular stimuli and intracellular signaling pathways modulate the chondrocyte phenotype. Because many diseases are mechanobiology-related, this review asked to what extent phenotype regulators control chondrocyte function through the cytoskeleton and cytoskeleton-regulating signaling processes. Such information would generate leverage for advanced articular cartilage repair. Serial passaging, pro-inflammatory cytokine signaling (TNF-α, IL-1α, IL-1β, IL-6, and IL-8), growth factors (TGF-α), and osteoarthritis not only induce dedifferentiation but also converge on RhoA/ROCK/Rac1/mDia1/mDia2/Cdc42 to promote actin polymerization/crosslinking for stress fiber (SF) formation. SF formation takes center stage in phenotype control, as both SF formation and SOX9 phosphorylation for COL2 expression are ROCK activity-dependent. Explaining how it is molecularly possible that dedifferentiation induces low COL2 expression but high SF formation, this review theorized that, in chondrocyte SOX9, phosphorylation by ROCK might effectively be sidelined in favor of other SF-promoting ROCK substrates, based on a differential ROCK affinity. In turn, actin depolymerization for redifferentiation would “free-up” ROCK to increase COL2 expression. Moreover, the actin cytoskeleton regulates COL1 expression, modulates COL2/aggrecan fragment generation, and mediates a fibrogenic/catabolic expression profile, highlighting that actin dynamics-regulating processes decisively control the chondrocyte phenotype. This suggests modulating the balance between actin polymerization/depolymerization for therapeutically controlling the chondrocyte phenotype.
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16
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Williams CAC, Soufi A, Pollard SM. Post-translational modification of SOX family proteins: Key biochemical targets in cancer? Semin Cancer Biol 2020; 67:30-38. [PMID: 31539559 PMCID: PMC7703692 DOI: 10.1016/j.semcancer.2019.09.009] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2019] [Revised: 08/23/2019] [Accepted: 09/15/2019] [Indexed: 12/15/2022]
Abstract
Sox proteins are a family of lineage-associated transcription factors. They regulate expression of genes involved in control of self-renewal and multipotency in both developmental and adult stem cells. Overexpression of Sox proteins is frequently observed in many different human cancers. Despite their importance as therapeutic targets, Sox proteins are difficult to 'drug' using structure-based design. However, Sox protein localisation, activity and interaction partners are regulated by a plethora of post-translational modifications (PTMs), such as: phosphorylation, acetylation, sumoylation, methylation, and ubiquitylation. Here we review the various reported post-translational modifications of Sox proteins and their potential functional importance in guiding cell fate processes. The enzymes that regulate these PTMs could be useful targets for anti-cancer drug discovery.
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Affiliation(s)
- Charles A C Williams
- MRC Centre for Regenerative Medicine, University of Edinburgh, 5 Little France Drive, EH16 4UU, Edinburgh, United Kingdom
| | - Abdenour Soufi
- MRC Centre for Regenerative Medicine, University of Edinburgh, 5 Little France Drive, EH16 4UU, Edinburgh, United Kingdom
| | - Steven M Pollard
- MRC Centre for Regenerative Medicine, University of Edinburgh, 5 Little France Drive, EH16 4UU, Edinburgh, United Kingdom.
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17
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Wang Z, Sa G, Wei Z, Dai X, Wan Q, Yang X. Obvious morphologic changes in the mandible and condylar cartilage after triple botulinum toxin injections into the bilateral masseter. Am J Orthod Dentofacial Orthop 2020; 158:e43-e52. [PMID: 32988574 DOI: 10.1016/j.ajodo.2020.01.017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2019] [Revised: 01/01/2020] [Accepted: 01/01/2020] [Indexed: 11/26/2022]
Abstract
INTRODUCTION Nonsurgical treatments that can prevent or reduce the extent of the mandibular excess at an early stage are desirable. A single botulinum toxin (BTX) injection into the unilateral and bilateral masseter can regulate mandibular contour and condylar cartilage. However, BTX injection is frequency dependent when used in facelifts. This study aimed to evaluate the effect of BTX injection into the bilateral masseter at different frequencies on the mandibular contour and condylar cartilage. METHODS In the present study, 24 female Sprague Dawley rats (4 weeks old) were divided into 3 groups: control, single injection, and triple injection. Contour measurement of the mandible was carried out by radiographic imaging. Microcomputerized tomography was performed to determine the change in bone volume in the subchondral bone. Hematoxylin and eosin staining was used to observe the morphologic changes of condylar cartilage. Immunohistochemistry was performed to detect the expression level of biomechanically sensitive factors, including transforming growth factor-β1, parathyroid hormone-related protein, SRY-box 9, and type II collagen. RESULTS Bone volume and/or total volume, trabecular number, and trabecular thickness of the mineralized cartilage and subchondral bone significantly decreased in the triple injection group when compared with the single injection group. Mandibular contour also diminished after increased BTX injection frequencies. Chondrocyte proliferation ability and the expression levels of transforming growth factor-β1, parathyroid hormone-related protein, SRY-box 9, and type II collagen significantly decreased in all BTX injection groups and more in the triple injection group. CONCLUSIONS Morphologic changes of the mandible and condylar cartilage become more obvious after increased BTX injection frequencies, suggesting that multiple BTX injections into the masseter of patients may relieve the severity of mandibular deformity at an early stage.
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Affiliation(s)
- Zhuo Wang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Guoliang Sa
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan, China; Department of Oral Maxillofacial Surgery, School and Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Zequan Wei
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Xing Dai
- Department of Skin Medical Cosmetology, Renmin Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Qilong Wan
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan, China; Department of Oral Maxillofacial Surgery, School and Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Xuewen Yang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan, China; Department of Oral Maxillofacial Surgery, School and Hospital of Stomatology, Wuhan University, Wuhan, China.
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18
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Neefjes M, van Caam APM, van der Kraan PM. Transcription Factors in Cartilage Homeostasis and Osteoarthritis. BIOLOGY 2020; 9:biology9090290. [PMID: 32937960 PMCID: PMC7563835 DOI: 10.3390/biology9090290] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Revised: 09/07/2020] [Accepted: 09/07/2020] [Indexed: 12/13/2022]
Abstract
Osteoarthritis (OA) is the most common degenerative joint disease, and it is characterized by articular cartilage loss. In part, OA is caused by aberrant anabolic and catabolic activities of the chondrocyte, the only cell type present in cartilage. These chondrocyte activities depend on the intra- and extracellular signals that the cell receives and integrates into gene expression. The key proteins for this integration are transcription factors. A large number of transcription factors exist, and a better understanding of the transcription factors activated by the various signaling pathways active during OA can help us to better understand the complex etiology of OA. In addition, establishing such a profile can help to stratify patients in different subtypes, which can be a very useful approach towards personalized therapy. In this review, we discuss crucial transcription factors for extracellular matrix metabolism, chondrocyte hypertrophy, chondrocyte senescence, and autophagy in chondrocytes. In addition, we discuss how insight into these factors can be used for treatment purposes.
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19
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Nakayama N, Pothiawala A, Lee JY, Matthias N, Umeda K, Ang BK, Huard J, Huang Y, Sun D. Human pluripotent stem cell-derived chondroprogenitors for cartilage tissue engineering. Cell Mol Life Sci 2020; 77:2543-2563. [PMID: 31915836 PMCID: PMC11104892 DOI: 10.1007/s00018-019-03445-2] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Revised: 12/24/2019] [Accepted: 12/27/2019] [Indexed: 02/06/2023]
Abstract
The cartilage of joints, such as meniscus and articular cartilage, is normally long lasting (i.e., permanent). However, once damaged, especially in large animals and humans, joint cartilage is not spontaneously repaired. Compensating the lack of repair activity by supplying cartilage-(re)forming cells, such as chondrocytes or mesenchymal stromal cells, or by transplanting a piece of normal cartilage, has been the basis of therapy for biological restoration of damaged joint cartilage. Unfortunately, current biological therapies face problems on a number of fronts. The joint cartilage is generated de novo from a specialized cell type, termed a 'joint progenitor' or 'interzone cell' during embryogenesis. Therefore, embryonic chondroprogenitors that mimic the property of joint progenitors might be the best type of cell for regenerating joint cartilage in the adult. Pluripotent stem cells (PSCs) are expected to differentiate in culture into any somatic cell type through processes that mimic embryogenesis, making human (h)PSCs a promising source of embryonic chondroprogenitors. The major research goals toward the clinical application of PSCs in joint cartilage regeneration are to (1) efficiently generate lineage-specific chondroprogenitors from hPSCs, (2) expand the chondroprogenitors to the number needed for therapy without loss of their chondrogenic activity, and (3) direct the in vivo or in vitro differentiation of the chondroprogenitors to articular or meniscal (i.e., permanent) chondrocytes rather than growth plate (i.e., transient) chondrocytes. This review is aimed at providing the current state of research toward meeting these goals. We also include our recent achievement of successful generation of "permanent-like" cartilage from long-term expandable, hPSC-derived ectomesenchymal chondroprogenitors.
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Affiliation(s)
- Naoki Nakayama
- Brown Foundation Institute of Molecular Medicine, The University of Texas Health Science Center at Houston Medical School, 1825 Pressler St., Houston, TX, 77030, USA.
- Department of Orthopaedic Surgery, The University of Texas Health Science Center at Houston Medical School, Houston, TX, USA.
| | - Azim Pothiawala
- Brown Foundation Institute of Molecular Medicine, The University of Texas Health Science Center at Houston Medical School, 1825 Pressler St., Houston, TX, 77030, USA
| | - John Y Lee
- Brown Foundation Institute of Molecular Medicine, The University of Texas Health Science Center at Houston Medical School, 1825 Pressler St., Houston, TX, 77030, USA
- Miller School of Medicine, University of Miami, Miami, FL, USA
| | - Nadine Matthias
- Brown Foundation Institute of Molecular Medicine, The University of Texas Health Science Center at Houston Medical School, 1825 Pressler St., Houston, TX, 77030, USA
| | - Katsutsugu Umeda
- Brown Foundation Institute of Molecular Medicine, The University of Texas Health Science Center at Houston Medical School, 1825 Pressler St., Houston, TX, 77030, USA
- Department of Pediatrics, Kyoto University School of Medicine, Kyoto, Japan
| | - Bryan K Ang
- Brown Foundation Institute of Molecular Medicine, The University of Texas Health Science Center at Houston Medical School, 1825 Pressler St., Houston, TX, 77030, USA
- Weil Cornell Medicine, New York, NY, USA
| | - Johnny Huard
- Department of Orthopaedic Surgery, The University of Texas Health Science Center at Houston Medical School, Houston, TX, USA
- Steadman Philippon Research Institute, Vail, CO, USA
| | - Yun Huang
- Institute of Bioscience and Technology, Texas A&M University, Houston, TX, USA
| | - Deqiang Sun
- Institute of Bioscience and Technology, Texas A&M University, Houston, TX, USA
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20
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Sahu N, Budhiraja G, Subramanian A. Preconditioning of mesenchymal stromal cells with low-intensity ultrasound: influence on chondrogenesis and directed SOX9 signaling pathways. Stem Cell Res Ther 2020; 11:6. [PMID: 31900222 PMCID: PMC6942392 DOI: 10.1186/s13287-019-1532-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Revised: 11/26/2019] [Accepted: 12/16/2019] [Indexed: 12/11/2022] Open
Abstract
Background Continuous low-intensity ultrasound (cLIUS) facilitates the chondrogenic differentiation of human mesenchymal stromal cells (MSCs) in the absence of exogenously added transforming growth factor-beta (TGFβ) by upregulating the expression of transcription factor SOX9, a master regulator of chondrogenesis. The present study evaluated the molecular events associated with the signaling pathways impacting SOX9 gene and protein expression under cLIUS. Methods Human bone marrow-derived MSCs were exposed to cLIUS stimulation at 14 kPa (5 MHz, 2.5 Vpp) for 5 min. The gene and protein expression of SOX9 was evaluated. The specificity of SOX9 upregulation under cLIUS was determined by treating the MSCs with small molecule inhibitors of select signaling molecules, followed by cLIUS treatment. Signaling events regulating SOX9 expression under cLIUS were analyzed by gene expression, immunofluorescence staining, and western blotting. Results cLIUS upregulated the gene expression of SOX9 and enhanced the nuclear localization of SOX9 protein when compared to non-cLIUS-stimulated control. cLIUS was noted to enhance the phosphorylation of the signaling molecule ERK1/2. Inhibition of MEK/ERK1/2 by PD98059 resulted in the effective abrogation of cLIUS-induced SOX9 expression, indicating that cLIUS-induced SOX9 upregulation was dependent on the phosphorylation of ERK1/2. Inhibition of integrin and TRPV4, the upstream cell-surface effectors of ERK1/2, did not inhibit the phosphorylation of ERK1/2 and therefore did not abrogate cLIUS-induced SOX9 expression, thereby suggesting the involvement of other mechanoreceptors. Consequently, the effect of cLIUS on the actin cytoskeleton, a mechanosensitive receptor regulating SOX9, was evaluated. Diffused and disrupted actin fibers observed in MSCs under cLIUS closely resembled actin disruption by treatment with cytoskeletal drug Y27632, which is known to increase the gene expression of SOX9. The upregulation of SOX9 under cLIUS was, therefore, related to cLIUS-induced actin reorganization. SOX9 upregulation induced by actin reorganization was also found to be dependent on the phosphorylation of ERK1/2. Conclusions Collectively, preconditioning of MSCs by cLIUS resulted in the nuclear localization of SOX9, phosphorylation of ERK1/2 and disruption of actin filaments, and the expression of SOX9 was dependent on the phosphorylation of ERK1/2 under cLIUS. Electronic supplementary material The online version of this article (10.1186/s13287-019-1532-2) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Neety Sahu
- Department of Chemical and Biomolecular Engineering, University of Nebraska-Lincoln, Lincoln, NE, 68588-0643, USA.,Present Address: Department of Orthopaedic Surgery, School of Medicine, Stanford University, Stanford, 94304, USA
| | - Gaurav Budhiraja
- Department of Chemical and Biomolecular Engineering, University of Nebraska-Lincoln, Lincoln, NE, 68588-0643, USA
| | - Anuradha Subramanian
- Department of Chemical and Materials Engineering, The University of Alabama in Huntsville, Huntsville, AL, 35899, USA.
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21
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SOX9 in cartilage development and disease. Curr Opin Cell Biol 2019; 61:39-47. [PMID: 31382142 DOI: 10.1016/j.ceb.2019.07.008] [Citation(s) in RCA: 145] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2019] [Accepted: 07/06/2019] [Indexed: 12/18/2022]
Abstract
SOX9 is a pivotal transcription factor in chondrocytes, a lineage essential in skeletogenesis. Its mandatory role in transactivating many cartilage-specific genes is well established, whereas its pioneer role in lineage specification, which along with transactivation defines master transcription factors, remains to be better defined. Abundant, but yet incomplete evidence exists that intricate molecular networks control SOX9 activity during the multi-step chondrogenesis pathway. They include a highly modular genetic regulation, post-transcriptional and post-translational modifications, and varying sets of functional partners. Fully uncovering SOX9 actions and regulation is fundamental to explain mechanisms underlying many diseases that directly or indirectly affect SOX9 activities and to design effective disease treatments. We here review current knowledge, highlight recent discoveries, and propose new research directions to answer remaining questions.
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Abstract
SOX transcription factors participate in the specification, differentiation and activities of many cell types in development and beyond. The 20 mammalian family members are distributed into eight groups based on sequence identity, and while co-expressed same-group proteins often have redundant functions, different-group proteins typically have distinct functions. More than a handful of SOX proteins have pivotal roles in skeletogenesis. Heterozygous mutations in their genes cause human diseases, in which skeletal dysmorphism is a major feature, such as campomelic dysplasia (SOX9), or a minor feature, such as LAMSHF syndrome (SOX5) and Coffin-Siris-like syndromes (SOX4 and SOX11). Loss- and gain-of-function experiments in animal models have revealed that SOX4 and SOX11 (SOXC group) promote skeletal progenitor survival and control skeleton patterning and growth; SOX8 (SOXE group) delays the differentiation of osteoblast progenitors; SOX9 (SOXE group) is essential for chondrocyte fate maintenance and differentiation, and works in cooperation with SOX5 and SOX6 (SOXD group) and other types of transcription factors. These and other SOX proteins have also been proposed, mainly through in vitro experiments, to have key roles in other aspects of skeletogenesis, such as SOX2 in osteoblast stem cell self-renewal. We here review current knowledge of well-established and proposed skeletogenic roles of SOX proteins, their transcriptional and non-transcriptional actions, and their modes of regulation at the gene, RNA and protein levels. We also discuss gaps in knowledge and directions for future research to further decipher mechanisms underlying skeletogenesis in health and diseases and identify treatment options for skeletal malformation and degeneration diseases.
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Affiliation(s)
- Véronique Lefebvre
- The Children's Hospital of Philadelphia, Philadelphia, PA, United States.
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23
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Baird DA, Evans DS, Kamanu FK, Gregory JS, Saunders FR, Giuraniuc CV, Barr RJ, Aspden RM, Jenkins D, Kiel DP, Orwoll ES, Cummings SR, Lane NE, Mullin BH, Williams FMK, Richards JB, Wilson SG, Spector TD, Faber BG, Lawlor DA, Grundberg E, Ohlsson C, Pettersson‐Kymmer U, Capellini TD, Richard D, Beck TJ, Evans DM, Paternoster L, Karasik D, Tobias JH. Identification of Novel Loci Associated With Hip Shape: A Meta-Analysis of Genomewide Association Studies. J Bone Miner Res 2019; 34:241-251. [PMID: 30320955 PMCID: PMC6375741 DOI: 10.1002/jbmr.3605] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Revised: 08/30/2018] [Accepted: 10/06/2018] [Indexed: 02/05/2023]
Abstract
We aimed to report the first genomewide association study (GWAS) meta-analysis of dual-energy X-ray absorptiometry (DXA)-derived hip shape, which is thought to be related to the risk of both hip osteoarthritis and hip fracture. Ten hip shape modes (HSMs) were derived by statistical shape modeling using SHAPE software, from hip DXA scans in the Avon Longitudinal Study of Parents and Children (ALSPAC; adult females), TwinsUK (mixed sex), Framingham Osteoporosis Study (FOS; mixed), Osteoporotic Fractures in Men study (MrOS), and Study of Osteoporotic Fractures (SOF; females) (total N = 15,934). Associations were adjusted for age, sex, and ancestry. Five genomewide significant (p < 5 × 10-9 , adjusted for 10 independent outcomes) single-nucleotide polymorphisms (SNPs) were associated with HSM1, and three SNPs with HSM2. One SNP, in high linkage disequilibrium with rs2158915 associated with HSM1, was associated with HSM5 at genomewide significance. In a look-up of previous GWASs, three of the identified SNPs were associated with hip osteoarthritis, one with hip fracture, and five with height. Seven SNPs were within 200 kb of genes involved in endochondral bone formation, namely SOX9, PTHrP, RUNX1, NKX3-2, FGFR4, DICER1, and HHIP. The SNP adjacent to DICER1 also showed osteoblast cis-regulatory activity of GSC, in which mutations have previously been reported to cause hip dysplasia. For three of the lead SNPs, SNPs in high LD (r2 > 0.5) were identified, which intersected with open chromatin sites as detected by ATAC-seq performed on embryonic mouse proximal femora. In conclusion, we identified eight SNPs independently associated with hip shape, most of which were associated with height and/or mapped close to endochondral bone formation genes, consistent with a contribution of processes involved in limb growth to hip shape and pathological sequelae. These findings raise the possibility that genetic studies of hip shape might help in understanding potential pathways involved in hip osteoarthritis and hip fracture. © 2018 The Authors. Journal of Bone and Mineral Research Published by Wiley Periodicals, Inc.
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Affiliation(s)
- Denis A Baird
- Musculoskeletal Research UnitUniversity of BristolBristolUK
| | - Daniel S Evans
- California Pacific Medical Center Research InstituteSan FranciscoCAUSA
| | - Frederick K Kamanu
- Institute for Aging ResearchHebrew SeniorLifeDepartment of MedicineBeth Israel Deaconess Medical Center and Harvard Medical SchoolBostonMAUSA
| | | | - Fiona R Saunders
- Arthritis and Musculoskeletal MedicineUniversity of AberdeenAberdeenUK
| | | | - Rebecca J Barr
- Arthritis and Musculoskeletal MedicineUniversity of AberdeenAberdeenUK
- MEMO ResearchUniversity of DundeeDundeeUK
| | - Richard M Aspden
- Arthritis and Musculoskeletal MedicineUniversity of AberdeenAberdeenUK
| | | | - Douglas P Kiel
- Institute for Aging ResearchHebrew SeniorLifeDepartment of MedicineBeth Israel Deaconess Medical Center and Harvard Medical SchoolBostonMAUSA
- Broad Institute of MIT and HarvardBostonMAUSA
| | - Eric S Orwoll
- School of MedicineOregon Health and Science UniversityPortlandORUSA
| | - Steven R Cummings
- California Pacific Medical Center Research InstituteSan FranciscoCAUSA
| | - Nancy E Lane
- University of California at DavisSacramentoCAUSA
| | - Benjamin H Mullin
- Department of Endocrinology and DiabetesSir Charles Gairdner HospitalNedlandsAustralia
- School of Biomedical SciencesUniversity of Western AustraliaPerthAustralia
| | - Frances MK Williams
- Department of Twin Research and Genetic EpidemiologyKing's College LondonLondonUK
| | - J Brent Richards
- Department of Twin Research and Genetic EpidemiologyKing's College LondonLondonUK
- Departments of Medicine, Human Genetics, Epidemiology, and BiostatisticsJewish General HospitalMcGill UniversityMontrealCanada
| | - Scott G Wilson
- Department of Endocrinology and DiabetesSir Charles Gairdner HospitalNedlandsAustralia
- School of Biomedical SciencesUniversity of Western AustraliaPerthAustralia
- Department of Twin Research and Genetic EpidemiologyKing's College LondonLondonUK
| | - Tim D Spector
- Department of Twin Research and Genetic EpidemiologyKing's College LondonLondonUK
| | | | | | - Elin Grundberg
- Department of Human GeneticsMcGill UniversityMontrealCanada
| | - Claes Ohlsson
- Centre for Bone and Arthritis ResearchInstitute of MedicineUniversity of GothenburgGothenburgSweden
| | | | - Terence D Capellini
- Broad Institute of MIT and HarvardBostonMAUSA
- Human Evolutionary BiologyHarvard UniversityBostonMAUSA
| | | | | | - David M Evans
- MRC Integrative Epidemiology UnitUniversity of BristolBristolUK
- University of Queensland Diamantina InstituteTranslational Research InstituteBrisbaneAustralia
| | | | - David Karasik
- Institute for Aging ResearchHebrew SeniorLifeDepartment of MedicineBeth Israel Deaconess Medical Center and Harvard Medical SchoolBostonMAUSA
- Azrieli Faculty of MedicineBar Ilan UniversitySafedIsrael
| | - Jonathan H Tobias
- Musculoskeletal Research UnitUniversity of BristolBristolUK
- MRC Integrative Epidemiology UnitUniversity of BristolBristolUK
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Yip RK, Chan D, Cheah KS. Mechanistic insights into skeletal development gained from genetic disorders. Curr Top Dev Biol 2019; 133:343-385. [DOI: 10.1016/bs.ctdb.2019.02.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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25
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Wang HC, Lin YT, Lin TH, Chang NJ, Lin CC, Hsu HC, Yeh ML. Intra-articular injection of N-acetylglucosamine and hyaluronic acid combined with PLGA scaffolds for osteochondral repair in rabbits. PLoS One 2018; 13:e0209747. [PMID: 30596714 PMCID: PMC6312252 DOI: 10.1371/journal.pone.0209747] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Accepted: 12/11/2018] [Indexed: 01/08/2023] Open
Abstract
Repairing damaged articular cartilage is particularly challenging because of the limited ability of cartilage to perform self-repair. Intra-articular injections of N-acetylglucosamine (GlcNAc) comprise a method of repairing full-thickness articular cartilage defects in the rabbit knee joint model. To date, the effects of administration of GlcNAc and hyaluronic acid (HA) have been investigated only in the context of osteoarthritis treatment. Therefore, we evaluated the therapeutic effects of using cell-free porous poly lactic-co-glycolic acid (PLGA) graft implants and intra-articular injections of GlcNAc or HA in a rabbit model of osteochondral regeneration to investigate whether they have the potential for inducing osteochondral regeneration when used alone or simultaneously. Twenty-four rabbits were randomized into one of four groups: the scaffold-only group (PLGA), the scaffold with intra-articular injections of GlcNAc (PLGA+G) group, twice per week for four weeks; the scaffold with intra-articular injections of HA group (PLGA+HA) group, once per week for three weeks; and the scaffold with intra-articular injections of GlcNAc and HA (PLGA+G+HA) group, once per week for three weeks. Knees were evaluated at 4 and 12 weeks after surgery. At the end of testing, only the PLGA+G+HA group exhibited significant bone reconstruction, chondrocyte clustering, and good interactions with adjacent surfaces at 4 weeks. Additionally, the PLGA+G+HA group demonstrated essentially original hyaline cartilage structures that appeared to have sound chondrocyte orientation, considerable glycosaminoglycan levels, and reconstruction of the bone structure at 12 weeks. Moreover, the PLGA+G+HA group showed organized osteochondral integration and significantly higher bone volume per tissue volume and trabecular thickness. However, there were no significant differences between the PLGA+G and PLGA+HA groups except for gap formation on subchondral bone in the PLGA+G group. This study demonstrated that PLGA implantation combined with intra-articular injections of GlcNAc and HA allowed for cartilage and bone regeneration and significantly promoted osteochondral regeneration in rabbits without supplementation of exogenous growth factors. And the combination of this two supplements with PLGA scaffold could also prolong injection interval and better performance than either of them alone for the reconstruction of osteochondral tissue in the knee joints of rabbits.
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Affiliation(s)
- Hsueh-Chun Wang
- Department of Biomedical Engineering, National Cheng Kung University, Tainan, Taiwan
| | - Yi-Ting Lin
- Department of Biomedical Engineering, National Cheng Kung University, Tainan, Taiwan
| | - Tzu-Hsiang Lin
- Department of Biomedical Engineering, National Cheng Kung University, Tainan, Taiwan
| | - Nai-Jen Chang
- Department of Sports Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Chih-Chan Lin
- Laboratory Animal Center, Department of Medical Research, Chi-Mei Medical Center, Tainan, Taiwan
| | - Horng-Chaung Hsu
- Department of Orthopedics, China Medical University Hospital, Taichung, Taiwan
| | - Ming-Long Yeh
- Department of Biomedical Engineering, National Cheng Kung University, Tainan, Taiwan
- Medical Device Innovation Center, National Cheng Kung University, Tainan, Taiwan
- * E-mail:
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26
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Pini J, Giuliano S, Matonti J, Gannoun L, Simkin D, Rouleau M, Bendahhou S. Osteogenic and Chondrogenic Master Genes Expression Is Dependent on the Kir2.1 Potassium Channel Through the Bone Morphogenetic Protein Pathway. J Bone Miner Res 2018; 33:1826-1841. [PMID: 29813186 DOI: 10.1002/jbmr.3474] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Revised: 05/04/2018] [Accepted: 05/20/2018] [Indexed: 11/07/2022]
Abstract
Andersen's syndrome is a rare disorder affecting muscle, heart, and bone that is associated with mutations leading to a loss of function of the inwardly rectifying K+ channel Kir2.1. Although the Kir2.1 function can be anticipated in excitable cells by controlling the electrical activity, its role in non-excitable cells remains to be investigated. Using Andersen's syndrome-induced pluripotent stem cells, we investigated the cellular and molecular events during the osteoblastic and chondrogenic differentiation that are affected by the loss of the Ik1 current. We show that loss of Kir2.1 channel function impairs both osteoblastic and chondrogenic processes through the downregulation of master gene expression. This downregulation is the result of an impairment of the bone morphogenetic proteins signaling pathway through dephosphorylation of the Smad proteins. Restoring Kir2.1 channel function in Andersen's syndrome cells rescued master genes expression and restored normal osteoblast and chondrocyte behavior. Our results show that Kir2.1-mediated activity controls endochondral and intramembranous ossification signaling pathways. © 2018 American Society for Bone and Mineral Research.
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Affiliation(s)
- Jonathan Pini
- Centre for Regenerative Medicine, Massachusetts General Hospital, Harvard Medical School, Harvard Stem Cell Institute, Boston, MA, USA
| | - Serena Giuliano
- UMR7370 CNRS, LP2M, Labex ICST, University Nice Côte d'Azur, Faculté de Médecine, Nice, France
| | - Julia Matonti
- UMR7370 CNRS, LP2M, Labex ICST, University Nice Côte d'Azur, Faculté de Médecine, Nice, France
| | - Lila Gannoun
- UMR7370 CNRS, LP2M, Labex ICST, University Nice Côte d'Azur, Faculté de Médecine, Nice, France
| | - Dina Simkin
- Department of Pharmacology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Matthieu Rouleau
- UMR7370 CNRS, LP2M, Labex ICST, University Nice Côte d'Azur, Faculté de Médecine, Nice, France
| | - Saïd Bendahhou
- UMR7370 CNRS, LP2M, Labex ICST, University Nice Côte d'Azur, Faculté de Médecine, Nice, France
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Singh YP, Moses JC, Bhardwaj N, Mandal BB. Injectable hydrogels: a new paradigm for osteochondral tissue engineering. J Mater Chem B 2018; 6:5499-5529. [PMID: 32254962 DOI: 10.1039/c8tb01430b] [Citation(s) in RCA: 64] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Osteochondral tissue engineering has become a promising strategy for repairing focal chondral lesions and early osteoarthritis (OA), which account for progressive joint pain and disability in millions of people worldwide. Towards improving osteochondral tissue repair, injectable hydrogels have emerged as promising matrices due to their wider range of properties such as their high water content and porous framework, similarity to the natural extracellular matrix (ECM), ability to encapsulate cells within the matrix and ability to provide biological cues for cellular differentiation. Further, their properties such as those that facilitate minimally invasive deployment or delivery, and their ability to repair geometrically complex irregular defects have been critical for their success. In this review, we provide an overview of innovative approaches to engineer injectable hydrogels towards improved osteochondral tissue repair. Herein, we focus on understanding the biology of osteochondral tissue and osteoarthritis along with the need for injectable hydrogels in osteochondral tissue engineering. Furthermore, we discuss in detail different biomaterials (natural and synthetic) and various advanced fabrication methods being employed for the development of injectable hydrogels in osteochondral repair. In addition, in vitro and in vivo applications of developed injectable hydrogels for osteochondral tissue engineering are also reviewed. Finally, conclusions and future perspectives of using injectable hydrogels in osteochondral tissue engineering are provided.
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Affiliation(s)
- Yogendra Pratap Singh
- Biomaterial and Tissue Engineering Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati-781039, Assam, India.
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Abstract
PURPOSE OF REVIEW The current review focuses on the neonatal presentation of disorders of sex development, summarize the current approach to the evaluation of newborns and describes recent advances in understanding of underlying genetic aetiology of these conditions. RECENT FINDINGS Several possible candidate genes as well as other adverse environmental factors have been described as contributing to several clinical subgroups of 46,XY DSDs. Moreover, registry-based studies showed that infants with suspected DSD may have extragenital anomalies and in 46,XY cases, being small for gestational age (SGA), cardiac and neurological malformations are the commonest concomitant conditions. SUMMARY Considering that children and adults with DSD may be at risk of several comorbidities a clear aetiological diagnosis will guide further management. To date, a firm diagnosis is not reached in over half of the cases of 46,XY DSD. Whilst it is likely that improved diagnostic resources will bridge this gap in the future, the next challenge to the clinical community will be to show that such advances will result in an improvement in clinical care.
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Lee JY, Matthias N, Pothiawala A, Ang BK, Lee M, Li J, Sun D, Pigeot S, Martin I, Huard J, Huang Y, Nakayama N. Pre-transplantational Control of the Post-transplantational Fate of Human Pluripotent Stem Cell-Derived Cartilage. Stem Cell Reports 2018; 11:440-453. [PMID: 30057264 PMCID: PMC6092881 DOI: 10.1016/j.stemcr.2018.06.021] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Revised: 06/28/2018] [Accepted: 06/29/2018] [Indexed: 01/24/2023] Open
Abstract
Cartilage pellets generated from ectomesenchymal progeny of human pluripotent stem cells (hPSCs) in vitro eventually show signs of commitment of chondrocytes to hypertrophic differentiation. When transplanted subcutaneously, most of the surviving pellets were fully mineralized by 8 weeks. In contrast, treatment with the adenylyl cyclase activator, forskolin, in vitro resulted in slightly enlarged cartilage pellets containing an increased proportion of proliferating immature chondrocytes that expressed very low levels of hypertrophic/terminally matured chondrocyte-specific genes. Forskolin treatment also enhanced hyaline cartilage formation by reducing type I collagen gene expression and increasing sulfated glycosaminoglycan accumulation in the developed cartilage. Chondrogenic mesoderm from hPSCs and dedifferentiated nasal chondrocytes responded similarly to forskolin. Furthermore, forskolin treatment in vitro increased the frequency at which the cartilage pellets maintained unmineralized chondrocytes after subcutaneous transplantation. Thus, the post-transplantational fate of chondrocytes originating from hPSC-derived chondroprogenitors can be controlled during their genesis in vitro. Forskolin/cAMP suppresses/delays BMP-induced chondrocyte maturation in vitro Forskolin supports chondrocyte proliferation and hyaline chondrogenesis in vitro Forskolin suppresses osteogenesis and BMP signaling gene expression in cartilage In vitro forskolin treatment improves in vivo maintenance of uncalcified cartilage
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Affiliation(s)
- John Y Lee
- Brown Foundation Institute of Molecular Medicine, The University of Texas Health Science Center at Houston (UTHealth) Medical School, 1825 Pressler St., Houston, TX 77030, USA
| | - Nadine Matthias
- Brown Foundation Institute of Molecular Medicine, The University of Texas Health Science Center at Houston (UTHealth) Medical School, 1825 Pressler St., Houston, TX 77030, USA
| | - Azim Pothiawala
- Brown Foundation Institute of Molecular Medicine, The University of Texas Health Science Center at Houston (UTHealth) Medical School, 1825 Pressler St., Houston, TX 77030, USA
| | - Bryan K Ang
- Brown Foundation Institute of Molecular Medicine, The University of Texas Health Science Center at Houston (UTHealth) Medical School, 1825 Pressler St., Houston, TX 77030, USA
| | - Minjung Lee
- Institute of Biosciences and Technology, College of Medicine, Texas A&M University, Houston, TX 77030, USA
| | - Jia Li
- Institute of Biosciences and Technology, College of Medicine, Texas A&M University, Houston, TX 77030, USA
| | - Deqiang Sun
- Institute of Biosciences and Technology, College of Medicine, Texas A&M University, Houston, TX 77030, USA
| | - Sebastien Pigeot
- Department of Biomedicine, University Hospital Basel, Basel CH-4031, Switzerland
| | - Ivan Martin
- Department of Biomedicine, University Hospital Basel, Basel CH-4031, Switzerland
| | - Johnny Huard
- Department of Orthopaedic Surgery, UTHealth Medical School, Houston, TX 77030, USA
| | - Yun Huang
- Institute of Biosciences and Technology, College of Medicine, Texas A&M University, Houston, TX 77030, USA
| | - Naoki Nakayama
- Brown Foundation Institute of Molecular Medicine, The University of Texas Health Science Center at Houston (UTHealth) Medical School, 1825 Pressler St., Houston, TX 77030, USA; Department of Orthopaedic Surgery, UTHealth Medical School, Houston, TX 77030, USA.
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30
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Li C, Zheng Z, Jiang J, Jiang W, Lee K, Berthiaume EA, Chen EC, Culiat CT, Zhou YH, Zhang X, Ting K, Soo C. Neural EGFL-Like 1 Regulates Cartilage Maturation through Runt-Related Transcription Factor 3-Mediated Indian Hedgehog Signaling. THE AMERICAN JOURNAL OF PATHOLOGY 2018; 188:392-403. [PMID: 29137952 PMCID: PMC5785559 DOI: 10.1016/j.ajpath.2017.09.020] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Revised: 09/02/2017] [Accepted: 09/26/2017] [Indexed: 02/05/2023]
Abstract
The pro-chondrogenic function of runt-related transcription factor 2 (Runx2) was previously considered to be dependent on direct binding with the promoter of Indian hedgehog (Ihh)-the major regulator of chondrocyte differentiation, proliferation, and maturation. The authors' previous studies identified neural EGFL like 1 (Nell-1) as a Runx2-responsive growth factor for chondrogenic differentiation and maturation. In this study, it was further revealed that the pro-chondrogenic activities of Nell-1 also rely on Ihh signaling, by showing: i) Nell-1 significantly elevated Ihh signal transduction; ii) Nell-1 deficiency markedly reduced Ihh activation in chondrocytes; and iii) Nell-1-stimulated chondrogenesis was significantly reduced by the specific hedgehog inhibitor cyclopamine. Importantly, the authors demonstrated that Nell-1-responsive Ihh signaling and chondrogenic differentiation extended to Runx2-/- models in vitro and in vivo. In Runx2-/- chondrocytes, Nell-1 stimulated the expression and signal transduction of Runx3, another transcription factor required for complete chondrogenic differentiation and maturation. Furthermore, knocking down Runx3 in Runx2-/- chondrocytes abolished Nell-1's stimulation of Ihh-associated molecule expression, which validates Runx3 as a major mediator of Nell-1-stimulated Ihh activation. For the first time, the Runx2→Nell-1→Runx3→Ihh signaling cascade during chondrogenic differentiation and maturation has been identified as an alternative, but critical, pathway for Runx2 to function as a pro-chondrogenic molecule via Nell-1.
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Affiliation(s)
- Chenshuang Li
- Section of Orthodontics, Division of Growth and Development, School of Dentistry, University of California, Los Angeles, California; Department of Orthodontics, Peking University, School and Hospital of Stomatology, Beijing, People's Republic of China
| | - Zhong Zheng
- Section of Orthodontics, Division of Growth and Development, School of Dentistry, University of California, Los Angeles, California
| | - Jie Jiang
- UCLA Division of Plastic and Reconstructive Surgery and Department of Orthopaedic Surgery and the Orthopaedic Hospital Research Center, University of California, Los Angeles, California
| | - Wenlu Jiang
- Section of Orthodontics, Division of Growth and Development, School of Dentistry, University of California, Los Angeles, California; State Key Laboratory of Oral Diseases, Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, People's Republic of China
| | - Kevin Lee
- Section of Orthodontics, Division of Growth and Development, School of Dentistry, University of California, Los Angeles, California
| | - Emily A Berthiaume
- David Geffen School of Medicine at UCLA, University of California, Los Angeles, California
| | - Eric C Chen
- Section of Orthodontics, Division of Growth and Development, School of Dentistry, University of California, Los Angeles, California
| | | | - Yan-Heng Zhou
- Department of Orthodontics, Peking University, School and Hospital of Stomatology, Beijing, People's Republic of China
| | - Xinli Zhang
- Section of Orthodontics, Division of Growth and Development, School of Dentistry, University of California, Los Angeles, California
| | - Kang Ting
- Section of Orthodontics, Division of Growth and Development, School of Dentistry, University of California, Los Angeles, California; UCLA Division of Plastic and Reconstructive Surgery and Department of Orthopaedic Surgery and the Orthopaedic Hospital Research Center, University of California, Los Angeles, California.
| | - Chia Soo
- UCLA Division of Plastic and Reconstructive Surgery and Department of Orthopaedic Surgery and the Orthopaedic Hospital Research Center, University of California, Los Angeles, California.
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31
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Wu SC, Chen CH, Wang JY, Lin YS, Chang JK, Ho ML. Hyaluronan size alters chondrogenesis of adipose-derived stem cells via the CD44/ERK/SOX-9 pathway. Acta Biomater 2018; 66:224-237. [PMID: 29128538 DOI: 10.1016/j.actbio.2017.11.025] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Revised: 11/02/2017] [Accepted: 11/07/2017] [Indexed: 12/23/2022]
Abstract
Hyaluronan (HA) is a natural linear polymer that is one of the main types of extracellular matrix during the early stage of chondrogenesis. We found that the chondrogenesis of adipose-derived stem cells (ADSCs) can be initiated and promoted by the application of HA to mimic the chondrogenic niche. The aim of this study is to investigate the optimal HA molecular weight (Mw) for chondrogenesis of ADSCs and the detailed mechanism. In this study, we investigated the relationships among HA Mw, CD44 clustering, and the extracellular signal-regulated kinase (ERK)/SOX-9 pathway during chondrogenesis of ADSCs. Human ADSCs (hADSCs) and rabbit ADSCs (rADSCs) were isolated and expanded. Chondrogenesis was induced in rADSCs by culturing cells in HA-coated wells (HA Mw: 80 kDa, 600 kDa and 2000 kDa) and evaluated by examining cell aggregation, chondrogenic gene expression (collagen type II and aggrecan) and sulfated glycosaminoglycan (sGAG) deposition in vitro. Cartilaginous tissue formation in vivo was confirmed by implanting HA/rADSCs into joint cavities. CD44 clustering, ERK phosphorylation, SOX-9 expression and SOX-9 phosphorylation in cultured hADSCs were further evaluated. Isolated and expanded rADSCs showed multilineage potential and anchorage-independent growth properties. Cell aggregation, chondrogenic gene expression, and sGAG deposition increased with increasing HA Mw in rADSCs. The 2000 kDa HA had the most pronounced chondrogenic effect on rADSCs in vitro, and implanted 2000 kDa HA/rADSCs exhibited marked cartilaginous tissue formation in vivo. CD44 clustering and cell aggregation of hADSCs were enhanced by an increase in HA Mw. In addition, higher HA Mws further enhanced CD44 clustering, ERK phosphorylation, and SOX-9 expression and phosphorylation in hADSCs. Inhibiting CD44 clustering in hADSCs reduced HA-induced chondrogenic gene expression. Inhibiting ERK phosphorylation also simultaneously attenuated HA-induced SOX-9 expression and phosphorylation and chondrogenic gene expression in hADSCs. Our results indicate that HA initiates ADSC chondrogenesis and that higher Mw HAs exhibit stronger effects, with 2000 kDa HA having the strongest effect. These effects may be mediated through increased CD44 clustering and the ERK/SOX-9 signaling pathway. STATEMENT OF SIGNIFICANCE HA-based biomaterials have been studied in stem cell-based articular cartilage tissue engineering. However, little is known about the optimal HA size for stem cell chondrogenesis and the mechanism of how HA size modulates stem cell chondrogenesis. Accordingly, we used HAs with various Mws (80-2000 kDa) as culture substrates and tested their chondrogenic effect on ADSCs. Our results demonstrated that HAs with a Mw of 2000 kDa showed the optimal effect for chondrogenesis of ADSCs. Moreover, we found that HA size can regulate ADSC chondrogenesis via the CD44/ERK/SOX-9 pathway. This finding provides new information regarding the biochemical control of chondrogenesis by HA substrates that may add value to the development of HA-based biomaterials for articular cartilage regeneration.
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Affiliation(s)
- Shun-Cheng Wu
- Orthopaedic Research Center, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Chung-Hwan Chen
- Orthopaedic Research Center, Kaohsiung Medical University, Kaohsiung, Taiwan; Department of Orthopaedics, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan; Division of Adult Reconstruction Surgery, Department of Orthopedics, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan; Department of Orthopedics, Kaohsiung Municipal Ta-Tung Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Jyun-Ya Wang
- Orthopaedic Research Center, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Yi-Shan Lin
- Orthopaedic Research Center, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Je-Ken Chang
- Orthopaedic Research Center, Kaohsiung Medical University, Kaohsiung, Taiwan; Department of Orthopaedics, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan; Division of Adult Reconstruction Surgery, Department of Orthopedics, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan; Department of Orthopedics, Kaohsiung Municipal Ta-Tung Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan.
| | - Mei-Ling Ho
- Orthopaedic Research Center, Kaohsiung Medical University, Kaohsiung, Taiwan; Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan; Department of Physiology, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan; Department of Marine Biotechnology and Resources, National Sun Yat-sen University, Kaohsiung, Taiwan; Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan.
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32
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Uchimura T, Hollander JM, Nakamura DS, Liu Z, Rosen CJ, Georgakoudi I, Zeng L. An essential role for IGF2 in cartilage development and glucose metabolism during postnatal long bone growth. Development 2017; 144:3533-3546. [PMID: 28974642 DOI: 10.1242/dev.155598] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Accepted: 08/15/2017] [Indexed: 12/18/2022]
Abstract
Postnatal bone growth involves a dramatic increase in length and girth. Intriguingly, this period of growth is independent of growth hormone and the underlying mechanism is poorly understood. Recently, an IGF2 mutation was identified in humans with early postnatal growth restriction. Here, we show that IGF2 is essential for longitudinal and appositional murine postnatal bone development, which involves proper timing of chondrocyte maturation and perichondrial cell differentiation and survival. Importantly, the Igf2 null mouse model does not represent a simple delay of growth but instead uncoordinated growth plate development. Furthermore, biochemical and two-photon imaging analyses identified elevated and imbalanced glucose metabolism in the Igf2 null mouse. Attenuation of glycolysis rescued the mutant phenotype of premature cartilage maturation, thereby indicating that IGF2 controls bone growth by regulating glucose metabolism in chondrocytes. This work links glucose metabolism with cartilage development and provides insight into the fundamental understanding of human growth abnormalities.
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Affiliation(s)
- Tomoya Uchimura
- Program in Cell, Molecular and Developmental Biology, Sackler School of Graduate Biomedical Sciences, Tufts University, 136 Harrison Avenue, Boston, MA 02111, USA.,Department of Integrative Physiology and Pathobiology, Tufts University School of Medicine, 136 Harrison Avenue, Boston, MA 02111, USA
| | - Judith M Hollander
- Program in Cell, Molecular and Developmental Biology, Sackler School of Graduate Biomedical Sciences, Tufts University, 136 Harrison Avenue, Boston, MA 02111, USA.,Department of Integrative Physiology and Pathobiology, Tufts University School of Medicine, 136 Harrison Avenue, Boston, MA 02111, USA
| | - Daisy S Nakamura
- Program in Cell, Molecular and Developmental Biology, Sackler School of Graduate Biomedical Sciences, Tufts University, 136 Harrison Avenue, Boston, MA 02111, USA.,Department of Integrative Physiology and Pathobiology, Tufts University School of Medicine, 136 Harrison Avenue, Boston, MA 02111, USA
| | - Zhiyi Liu
- Department of Biomedical Engineering, Tufts University, 4 Colby Street, Medford, MA 02155, USA
| | - Clifford J Rosen
- Center for Clinical & Translational Research, Maine Medical Center Research Institute, 81 Research Drive, Scarborough, ME 04074, USA
| | - Irene Georgakoudi
- Department of Biomedical Engineering, Tufts University, 4 Colby Street, Medford, MA 02155, USA
| | - Li Zeng
- Program in Cell, Molecular and Developmental Biology, Sackler School of Graduate Biomedical Sciences, Tufts University, 136 Harrison Avenue, Boston, MA 02111, USA .,Department of Integrative Physiology and Pathobiology, Tufts University School of Medicine, 136 Harrison Avenue, Boston, MA 02111, USA.,Department of Orthopedics, Tufts Medical Center, 800 Washington Street, Boston, MA 02111, USA
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Abstract
SOX9 is a pivotal transcription factor in developing and adult cartilage. Its gene is expressed from the multipotent skeletal progenitor stage and is active throughout chondrocyte differentiation. While it is repressed in hypertrophic chondrocytes in cartilage growth plates, it remains expressed throughout life in permanent chondrocytes of healthy articular cartilage. SOX9 is required for chondrogenesis: it secures chondrocyte lineage commitment, promotes cell survival, and transcriptionally activates the genes for many cartilage-specific structural components and regulatory factors. Since heterozygous mutations within and around SOX9 were shown to cause the severe skeletal malformation syndrome called campomelic dysplasia, researchers around the world have worked assiduously to decipher the many facets of SOX9 actions and regulation in chondrogenesis. The more we learn, the more we realize the complexity of the molecular networks in which SOX9 fulfills its functions and is regulated at the levels of its gene, RNA, and protein, and the more we measure the many gaps remaining in knowledge. At the same time, new technologies keep giving us more means to push further the frontiers of knowledge. Research efforts must be pursued to fill these gaps and to better understand and treat many types of cartilage diseases in which SOX9 has or could have a critical role. These diseases include chondrodysplasias and cartilage degeneration diseases, namely osteoarthritis, a prevalent and still incurable joint disease. We here review the current state of knowledge of SOX9 actions and regulation in the chondrocyte lineage, and propose new directions for future fundamental and translational research projects.
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Affiliation(s)
- Véronique Lefebvre
- Department of Cellular & Molecular Medicine, Cleveland Clinic Lerner Research Institute, Cleveland, OH
| | - Mona Dvir-Ginzberg
- Institute of Dental Sciences, Faculty of Dental Medicine, Hebrew University of Jerusalem, Jerusalem, Israel
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34
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Ahi EP. Signalling pathways in trophic skeletal development and morphogenesis: Insights from studies on teleost fish. Dev Biol 2016; 420:11-31. [PMID: 27713057 DOI: 10.1016/j.ydbio.2016.10.003] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2016] [Revised: 10/02/2016] [Accepted: 10/03/2016] [Indexed: 12/12/2022]
Abstract
During the development of the vertebrate feeding apparatus, a variety of complicated cellular and molecular processes participate in the formation and integration of individual skeletal elements. The molecular mechanisms regulating the formation of skeletal primordia and their development into specific morphological structures are tightly controlled by a set of interconnected signalling pathways. Some of these pathways, such as Bmp, Hedgehog, Notch and Wnt, are long known for their pivotal roles in craniofacial skeletogenesis. Studies addressing the functional details of their components and downstream targets, the mechanisms of their interactions with other signals as well as their potential roles in adaptive morphological divergence, are currently attracting considerable attention. An increasing number of signalling pathways that had previously been described in different biological contexts have been shown to be important in the regulation of jaw skeletal development and morphogenesis. In this review, I provide an overview of signalling pathways involved in trophic skeletogenesis emphasizing studies of the most species-rich group of vertebrates, the teleost fish, which through their evolutionary history have undergone repeated episodes of spectacular trophic diversification.
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Affiliation(s)
- Ehsan Pashay Ahi
- Institute of Zoology, University of Graz, Universitätsplatz 2, A-8010 Graz, Austria; Institute of Life and Environmental Sciences, University of Iceland, Sturlugata 7, 101 Reykjavik, Iceland.
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35
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Zhou Z, Yu H, Wang Y, Guo Q, Wang L, Zhang H. ZNF606 interacts with Sox9 to regulate chondrocyte differentiation. Biochem Biophys Res Commun 2016; 479:920-926. [PMID: 27634221 DOI: 10.1016/j.bbrc.2016.09.048] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Accepted: 09/11/2016] [Indexed: 11/17/2022]
Abstract
SRY-related high-mobility-group box 9 (Sox9) gene is a transcription factor that plays an essential role in chondrocyte differentiation and cartilage formation. In this study, we identified the transcriptional factor ZNF606 as an interacting partner for Sox9 in cells. We further demonstrated that overexpression of ZNF606 inhibited the transcriptional activity of Sox9, while knockdown of ZNF606 increased Sox9-mediated transcription. Chromatin immunoprecipitation analysis revealed that ZNF606 prevents Sox9 binding to the enhancers of its target gene col2a1. Importantly, the interaction between ZNF606 and Sox9 was decreased during chondrocyte differentiation. Consistent with these findings, ZNF606 inhibited chondrocyte differentiation. Thus, our results demonstrate that ZNF606 acts as a novel Sox9 co-regulator that inhibits Sox9-mediated chondrocyte differentiation.
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Affiliation(s)
- Zhenhai Zhou
- Department of Spine Surgery, Xiangya Hospital of Central South University, Changsha, Hunan 410008, China
| | - Honggui Yu
- Department of Spine Surgery, Xiangya Hospital of Central South University, Changsha, Hunan 410008, China
| | - Yunjia Wang
- Department of Spine Surgery, Xiangya Hospital of Central South University, Changsha, Hunan 410008, China
| | - Qiang Guo
- Department of Spine Surgery, Xiangya Hospital of Central South University, Changsha, Hunan 410008, China
| | - Longjie Wang
- Department of Spine Surgery, Xiangya Hospital of Central South University, Changsha, Hunan 410008, China
| | - Hongqi Zhang
- Department of Spine Surgery, Xiangya Hospital of Central South University, Changsha, Hunan 410008, China.
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36
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Parathyroid hormone 1-34 reduces dexamethasone-induced terminal differentiation in human articular chondrocytes. Toxicology 2016; 368-369:116-128. [PMID: 27608943 DOI: 10.1016/j.tox.2016.09.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Accepted: 09/04/2016] [Indexed: 11/24/2022]
Abstract
Intra-articular injection of dexamethasone (Dex) is occasionally used to relieve pain and inflammation in osteoarthritis (OA) patients. Dex induces terminal differentiation of chondrogenic mesenchymal stem cells in vitro and causes impaired longitudinal skeletal growth in vivo. Parathyroid hormone 1-34 (PTH 1-34) has been shown to reverse terminal differentiation of osteoarthritic articular chondrocytes. We hypothesized that Dex induces terminal differentiation of articular chondrocytes and that this effect can be mitigated by PTH 1-34 treatment. We tested the effect of Dex on terminal differentiation in human articular chondrocytes and further tested if PTH 1-34 reverses the effects. We found that Dex treatment downregulated chondrogenic-induced expressions of SOX-9, collagen type IIa1 (Col2a1), and aggrecan and reduced synthesis of cartilaginous matrix (Col2a1 and sulfated glycosaminoglycan) synthesis. Dex treatment upregulated chondrocyte hypertrophic markers of collagen type X and alkaline phosphatase at mRNA and protein levels, and it increased the cell size of articular chondrocytes and induced cell death. These results indicated that Dex induces terminal differentiation of articular chondrocytes. To test whether PTH 1-34 treatment reverses Dex-induced terminal differentiation of articular chondrocytes, PTH 1-34 was co-administered with Dex. Results showed that PTH 1-34 treatment reversed both changes of chondrogenic and hypertrophic markers in chondrocytes induced by Dex. PTH 1-34 also decreased Dex-induced cell death. PTH 1-34 treatment reduces Dex-induced terminal differentiation and apoptosis of articular chondrocytes, and PTH 1-34 treatment may protect articular cartilage from further damage when received Dex administration.
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37
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He X, Ohba S, Hojo H, McMahon AP. AP-1 family members act with Sox9 to promote chondrocyte hypertrophy. Development 2016; 143:3012-23. [PMID: 27471255 DOI: 10.1242/dev.134502] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2015] [Accepted: 07/08/2016] [Indexed: 12/17/2022]
Abstract
An analysis of Sox9 binding profiles in developing chondrocytes identified marked enrichment of an AP-1-like motif. Here, we have explored the functional interplay between Sox9 and AP-1 in mammalian chondrocyte development. Among AP-1 family members, Jun and Fosl2 were highly expressed within prehypertrophic and early hypertrophic chondrocytes. Chromatin immunoprecipitation followed by DNA sequencing (ChIP-seq) showed a striking overlap in Jun- and Sox9-bound regions throughout the chondrocyte genome, reflecting direct binding of each factor to the same enhancers and a potential for protein-protein interactions within AP-1- and Sox9-containing complexes. In vitro reporter analysis indicated that direct co-binding of Sox9 and AP-1 at target motifs promoted gene activity. By contrast, where only one factor can engage its DNA target, the presence of the other factor suppresses target activation consistent with protein-protein interactions attenuating transcription. Analysis of prehypertrophic chondrocyte removal of Sox9 confirmed the requirement of Sox9 for hypertrophic chondrocyte development, and in vitro and ex vivo analyses showed that AP-1 promotes chondrocyte hypertrophy. Sox9 and Jun co-bound and co-activated a Col10a1 enhancer in Sox9 and AP-1 motif-dependent manners consistent with their combined action promoting hypertrophic gene expression. Together, the data support a model in which AP-1 family members contribute to Sox9 action in the transition of chondrocytes to the hypertrophic program.
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Affiliation(s)
- Xinjun He
- Department of Stem Cell Biology and Regenerative Medicine, Eli and Edythe Broad CIRM Center for Regenerative Medicine and Stem Cell Research, W.M. Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA
| | - Shinsuke Ohba
- Department of Bioengineering, the University of Tokyo, Tokyo 113-0033, Japan
| | - Hironori Hojo
- Department of Stem Cell Biology and Regenerative Medicine, Eli and Edythe Broad CIRM Center for Regenerative Medicine and Stem Cell Research, W.M. Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA
| | - Andrew P McMahon
- Department of Stem Cell Biology and Regenerative Medicine, Eli and Edythe Broad CIRM Center for Regenerative Medicine and Stem Cell Research, W.M. Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA
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38
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Martin TJ. Parathyroid Hormone-Related Protein, Its Regulation of Cartilage and Bone Development, and Role in Treating Bone Diseases. Physiol Rev 2016; 96:831-71. [DOI: 10.1152/physrev.00031.2015] [Citation(s) in RCA: 99] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Although parathyroid hormone-related protein (PTHrP) was discovered as a cancer-derived hormone, it has been revealed as an important paracrine/autocrine regulator in many tissues, where its effects are context dependent. Thus its location and action in the vasculature explained decades-long observations that injection of PTH into animals rapidly lowered blood pressure by producing vasodilatation. Its roles have been specified in development and maturity in cartilage and bone as a crucial regulator of endochondral bone formation and bone remodeling, respectively. Although it shares actions with parathyroid hormone (PTH) through the use of their common receptor, PTHR1, PTHrP has other actions mediated by regions within the molecule beyond the amino-terminal sequence that resembles PTH, including the ability to promote placental transfer of calcium from mother to fetus. A striking feature of the physiology of PTHrP is that it possesses structural features that equip it to be transported in and out of the nucleus, and makes use of a specific nuclear import mechanism to do so. Evidence from mouse genetic experiments shows that PTHrP generated locally in bone is essential for normal bone remodeling. Whereas the main physiological function of PTH is the hormonal regulation of calcium metabolism, locally generated PTHrP is the important physiological mediator of bone remodeling postnatally. Thus the use of intermittent injection of PTH as an anabolic therapy for bone appears to be a pharmacological application of the physiological function of PTHrP. There is much current interest in the possibility of developing PTHrP analogs that might enhance the therapeutic anabolic effects.
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Affiliation(s)
- T. John Martin
- St Vincent's Institute of Medical Research, Department of Medicine, University of Melbourne, St Vincent's Hospital, Melbourne, Australia
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39
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Kavand H, Haghighipour N, Zeynali B, Seyedjafari E, Abdemami B. Extremely Low Frequency Electromagnetic Field in Mesenchymal Stem Cells Gene Regulation: Chondrogenic Markers Evaluation. Artif Organs 2016; 40:929-937. [PMID: 27086585 DOI: 10.1111/aor.12696] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2015] [Revised: 11/14/2015] [Accepted: 12/23/2015] [Indexed: 01/02/2023]
Abstract
There is little evidence demonstrating the effects of electromagnetic fields (EMFs) generated within the biological entity and the effect of extrinsic fields on cellular programing. Taking the path of the more studied stimuli into attention, mechanical forces, it could be understood that nonchemical factors play a consequential role in transcriptional regulatory networks. Cartilaginous tissue consists of collagen protein that is considered as a piezoelectric substrate and is influenced by electric fields making chondrogenic specific genes an exciting candidate for bioelectromagnetic studies. As electromagnetic properties highly depend on the frequencies applied, this study delves into the ability of two EMFs with the frequency of 25 Hz and 50 Hz in inducing SOX9 and COL2 gene expressions in a three-dimensional (3D) mesenchymal stem cell (MSC)-alginate construct. Cell-alginate beads were divided into six groups and treated for a time period of 21 days. To determine the results, qualitative and quantitative data were both reviewed. On observation of real-time polymerase chain reaction (PCR) data, it was apparent that TGF-β1 treatment had a greater COL2 and SOX9 gene expression impact on MSCs compared to pulsed electromagnetic field (PEMF) treatments alone. COL2 was shown to have a greater transcriptional tendency to PEMF, whereas under defined electromagnetic parameters applied in this study, no significant difference was detected in SOX9 gene expressions compared to the control group. PEMF co-treatments enhanced the deposition of extracellular matrix molecules, as the matrix-rich beads were positively stained by Alcian blue. This genre of study is the venue for the control and healing of connective tissue defects.
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Affiliation(s)
- Hanie Kavand
- National Cell Bank of Iran, Pasteur Institute of Iran, Tehran, Iran.,Department of Cell and Molecular Biology, University of Tehran, Tehran, Iran
| | | | - Bahman Zeynali
- Developmental Biology Lab, School of Biology, University of Tehran, Tehran, Iran
| | - Ehsan Seyedjafari
- Department of Biotechnology, College of Science, University of Tehran, Tehran, Iran
| | - Baharak Abdemami
- National Cell Bank of Iran, Pasteur Institute of Iran, Tehran, Iran
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40
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Wang JR, Wang CJ, Xu CY, Wu XK, Hong D, Shi W, Gong Y, Chen HX, Long F, Wu XM. Signaling Cascades Governing Cdc42-Mediated Chondrogenic Differentiation and Mensenchymal Condensation. Genetics 2016; 202:1055-69. [PMID: 26739452 PMCID: PMC4787953 DOI: 10.1534/genetics.115.180109] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2015] [Accepted: 12/30/2015] [Indexed: 12/30/2022] Open
Abstract
Endochondral ossification consists of successive steps of chondrocyte differentiation, including mesenchymal condensation, differentiation of chondrocytes, and hypertrophy followed by mineralization and ossification. Loss-of-function studies have revealed that abnormal growth plate cartilage of the Cdc42 mutant contributes to the defects in endochondral bone formation. Here, we have investigated the roles of Cdc42 in osteogenesis and signaling cascades governing Cdc42-mediated chondrogenic differentiation. Though deletion of Cdc42 in limb mesenchymal progenitors led to severe defects in endochondral ossification, either ablation of Cdc42 in limb preosteoblasts or knockdown of Cdc42 in vitro had no obvious effects on bone formation and osteoblast differentiation. However, in Cdc42 mutant limb buds, loss of Cdc42 in mesenchymal progenitors led to marked inactivation of p38 and Smad1/5, and in micromass cultures, Cdc42 lay on the upstream of p38 to activate Smad1/5 in bone morphogenetic protein-2-induced mesenchymal condensation. Finally, Cdc42 also lay on the upstream of protein kinase B to transactivate Sox9 and subsequently induced the expression of chondrocyte differential marker in transforming growth factor-β1-induced chondrogenesis. Taken together, by using biochemical and genetic approaches, we have demonstrated that Cdc42 is involved not in osteogenesis but in chondrogenesis in which the BMP2/Cdc42/Pak/p38/Smad signaling module promotes mesenchymal condensation and the TGF-β/Cdc42/Pak/Akt/Sox9 signaling module facilitates chondrogenic differentiation.
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Affiliation(s)
- Jirong R Wang
- Department of Pharmacology, School of Medicine, Zhejiang University, Hangzhou 310058, China
| | - Chaojun J Wang
- Department of Urology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou 310009, China
| | - Chengyun Y Xu
- Department of Pharmacology, School of Medicine, Zhejiang University, Hangzhou 310058, China
| | - Xiaokai K Wu
- Department of Pharmacology, School of Medicine, Zhejiang University, Hangzhou 310058, China
| | - Dun Hong
- Department of Urology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou 310009, China
| | - Wei Shi
- Department of Pharmacology, School of Medicine, Zhejiang University, Hangzhou 310058, China
| | - Ying Gong
- Department of Pharmacology, School of Medicine, Zhejiang University, Hangzhou 310058, China
| | - Haixiao X Chen
- Department of Orthopedics, Taizhou Hospital, Linhai 317000, China
| | - Fanxin Long
- Departments of Orthopaedic Surgery, Medicine and Developmental Biology, Washington University, St. Louis, Missouri 63110
| | - Ximei M Wu
- Department of Pharmacology, School of Medicine, Zhejiang University, Hangzhou 310058, China Departments of Orthopaedic Surgery, Medicine and Developmental Biology, Washington University, St. Louis, Missouri 63110
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41
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Santa Maria C, Cheng Z, Li A, Wang J, Shoback D, Tu CL, Chang W. Interplay between CaSR and PTH1R signaling in skeletal development and osteoanabolism. Semin Cell Dev Biol 2016; 49:11-23. [PMID: 26688334 PMCID: PMC4761456 DOI: 10.1016/j.semcdb.2015.12.004] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2015] [Accepted: 12/05/2015] [Indexed: 12/01/2022]
Abstract
Parathyroid hormone (PTH)-related peptide (PTHrP) controls the pace of pre- and post-natal growth plate development by activating the PTH1R in chondrocytes, while PTH maintains mineral and skeletal homeostasis by modulating calciotropic activities in kidneys, gut, and bone. The extracellular calcium-sensing receptor (CaSR) is a member of family C, G protein-coupled receptor, which regulates mineral and skeletal homeostasis by controlling PTH secretion in parathyroid glands and Ca(2+) excretion in kidneys. Recent studies showed the expression of CaSR in chondrocytes, osteoblasts, and osteoclasts and confirmed its non-redundant roles in modulating the recruitment, proliferation, survival, and differentiation of the cells. This review emphasizes the actions of CaSR and PTH1R signaling responses in cartilage and bone and discusses how these two signaling cascades interact to control growth plate development and maintain skeletal metabolism in physiological and pathological conditions. Lastly, novel therapeutic regimens that exploit interrelationship between the CaSR and PTH1R are proposed to produce more robust osteoanabolism.
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Affiliation(s)
- Christian Santa Maria
- Endocrine Research Unit, University of California, San Francisco, Veterans Affairs Medical Center, San Francisco, CA, USA
| | - Zhiqiang Cheng
- Endocrine Research Unit, University of California, San Francisco, Veterans Affairs Medical Center, San Francisco, CA, USA
| | - Alfred Li
- Endocrine Research Unit, University of California, San Francisco, Veterans Affairs Medical Center, San Francisco, CA, USA
| | - Jiali Wang
- Endocrine Research Unit, University of California, San Francisco, Veterans Affairs Medical Center, San Francisco, CA, USA
| | - Dolores Shoback
- Endocrine Research Unit, University of California, San Francisco, Veterans Affairs Medical Center, San Francisco, CA, USA
| | - Chia-Ling Tu
- Endocrine Research Unit, University of California, San Francisco, Veterans Affairs Medical Center, San Francisco, CA, USA
| | - Wenhan Chang
- Endocrine Research Unit, University of California, San Francisco, Veterans Affairs Medical Center, San Francisco, CA, USA.
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42
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Guo F, Han X, Wu Z, Cheng Z, Hu Q, Zhao Y, Wang Y, Liu C. ATF6a, a Runx2-activable transcription factor, is a new regulator of chondrocyte hypertrophy. J Cell Sci 2015; 129:717-28. [PMID: 26527399 DOI: 10.1242/jcs.169623] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2015] [Accepted: 08/17/2015] [Indexed: 01/07/2023] Open
Abstract
Our previous research has shown that the spliced isoform of XBP1 (XBP1s) is an important downstream mediator of BMP2 and is involved in BMP2-stimulated chondrocyte differentiation. Herein, we report that ATF6 and its cleaved N-terminal cytoplasmic domain (known as ATF6a) are expressed in growth plate chondrocytes. We find that these proteins are differentially induced during BMP2-triggered chondrocyte differentiation. This differential expression probably results from the activation of the ATF6 gene by Runx2 and its repression by the Sox6 transcription factor. Runx2 and Sox6 act through their respective binding elements on the ATF6 gene. When overexpressed, ATF6 and ATF6a intensify chondrogenesis; our studies demonstrate that under the stimulation of ATF6 and ATF6a, chondrocytes tend to be hypertrophied and mineralized, a process leading to bone formation. By contrast, lowering expression of ATF6a by use of its specific siRNA suppresses chondrocyte differentiation. Moreover, ATF6a interacts with Runx2 and augments the Runx2-mediated hypertrophication of chondrocytes. Importantly, overexpression and knockdown of ATF6a during the chondrocyte hypertrophy process also led to altered expressions of IHH and PTHrP (also known as PTHLH). Taken together, these findings indicate that ATF6a favorably controls chondrogenesis and bone formation (1) by acting as a co-factor of Runx2 and enhancing Runx2-incited hypertrophic chondrocyte differentiation, and (2) by affecting IHH and PTHrP signaling.
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Affiliation(s)
- Fengjin Guo
- Department of Cell Biology and Genetics, Core Facility of Development Biology, Chongqing Medical University, Chongqing 400016, China
| | - Xiaofeng Han
- Department of Cell Biology and Genetics, Core Facility of Development Biology, Chongqing Medical University, Chongqing 400016, China
| | - Zhimeng Wu
- Department of Cell Biology and Genetics, Core Facility of Development Biology, Chongqing Medical University, Chongqing 400016, China
| | - Zhi Cheng
- Department of Cell Biology and Genetics, Core Facility of Development Biology, Chongqing Medical University, Chongqing 400016, China
| | - Qin Hu
- Department of Cell Biology and Genetics, Core Facility of Development Biology, Chongqing Medical University, Chongqing 400016, China
| | - Yunpeng Zhao
- Department of Orthopaedic Surgery, Qilu Hospital, Shandong University, Jinan 250012, China
| | - Yingxiong Wang
- Laboratory of Reproductive Biology, Chongqing Medical University, Chongqing, 400016 China
| | - Chuanju Liu
- Departments of Orthopaedic Surgery and Cell Biology, New York University School of Medicine, New York, 10016 NY, USA
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43
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Minaříková M, Oralová V, Veselá B, Radlanski RJ, Matalová E. Osteogenic Profile of Mesenchymal Cell Populations Contributing to Alveolar Bone Formation. Cells Tissues Organs 2015; 200:339-48. [PMID: 26451912 DOI: 10.1159/000439165] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/03/2015] [Indexed: 11/19/2022] Open
Abstract
Teeth develop within the surrounding periodontal tissues, involving the alveolar bone, periodontal ligament and cementum. The alveolar bone originates through the process of intramembranous ossification involving mesenchymal cells from the tooth germ. As most available data are related to endochondral ossification, we examined the molecular background of alveolar bone development. We investigated the osteogenic profile of mesenchymal cells dissected from mouse mandible slices at the stage of early alveolar bone formation. Relative monitoring of gene expression was undertaken using PCR Arrays; this included the profiles of 84 genes associated with osteogenesis. To examine the tooth-bone interface, stages with detectable changes in bone remodelling during development (E13.0, E14.0 and E15.0) were chosen and compared with each other. These results showed a statistically significant increase in the expression of the genes Fgf3, Ctsk, Icam-1, Mmp9, Itga3 and Tuft1, and of a wide range of collagens (Col1a2, Col3a1, Col7a1, Col12a1, Col14a1). Decreased expression was detected in the case of Col2a1, Sox9, Smad2 and Vegfb. To confirm these changes in gene expression, immunofluorescence analyses of Mmp9 and Sox9 proteins were performed in situ. Our research has identified several candidate genes that may be crucial for the initiation of alveolar bone formation and is the basis for further functional studies.
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Affiliation(s)
- Monika Minaříková
- Institute of Animal Physiology and Genetics CAS, v.v.i., Brno, Czech Republic
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44
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Robinson J, O'Brien A, Chen J, Wadhwa S. Progenitor Cells of the Mandibular Condylar Cartilage. ACTA ACUST UNITED AC 2015; 1:110-114. [PMID: 26500836 DOI: 10.1007/s40610-015-0019-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The secondary cartilage of the mandibular condyle is unique as it undergoes endochondral ossification during growth and robustly remodels in response to changes in its mechanical loading environment. This cartilage is derived from mesenchymal progenitor cells that express markers of early osteoblast differentiation, namely alkaline phosphatase (ALP) and runt-related transcription factor 2 (Runx2). Interestingly, these progenitor cells then differentiate into cartilage with appropriate mechanical loading. Our laboratory has determined that these cells can be labeled by osteoblast progenitor cell markers, including the 3.6 fragment of the rat collagen type 1. However, the role these mesenchymal progenitor cells play in adult mandibular condylar cartilage maintenance and adaptation, as well as the existence of a more potent progenitor cell population within the mandibular condylar cartilage, remain in question. Further characterization of these cells is necessary to determine their potency and regenerative capacity to elucidate their potential for regenerative therapy.
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Affiliation(s)
- Jennifer Robinson
- Division of Orthodontics, Columbia University College of Dental Medicine, New York, NY ; Department of Biomedical Engineering, Columbia University, New York, NY
| | - Alina O'Brien
- Columbia University College of Dental Medicine, New York, NY
| | - Jing Chen
- Division of Orthodontics, Columbia University College of Dental Medicine, New York, NY
| | - Sunil Wadhwa
- Division of Orthodontics, Columbia University College of Dental Medicine, New York, NY
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Kondo M, Yamaoka K, Sakata K, Sonomoto K, Lin L, Nakano K, Tanaka Y. Contribution of the Interleukin-6/STAT-3 Signaling Pathway to Chondrogenic Differentiation of Human Mesenchymal Stem Cells. Arthritis Rheumatol 2015; 67:1250-60. [PMID: 25604648 DOI: 10.1002/art.39036] [Citation(s) in RCA: 72] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2014] [Accepted: 01/13/2015] [Indexed: 12/13/2022]
Abstract
OBJECTIVE Mesenchymal stem cells (MSCs) are multipotent cells that can differentiate into chondrocytes. Articular cartilage contains MSC-like chondroprogenitor cells, which suggests their involvement in the maintenance of cartilage homeostasis by a self-repair mechanism. Interleukin-6 (IL-6) is a cytokine with a wide range of physiologic functions, which are produced by MSCs in a steady manner and in large quantities. The purpose of this study was to investigate the involvement of IL-6 signaling in MSC differentiation into chondrocytes. METHODS Human bone marrow-derived MSCs were cultured using a pellet culture system in medium containing transforming growth factor β3. Chondrogenic differentiation was detected by cartilage matrix accumulation and chondrogenic marker gene expression. RESULTS IL-6 was detected at a high concentration in culture supernatants during chondrogenic differentiation. The expression of the IL-6 receptor (IL-6R) was significantly increased, accompanied by markedly increased phosphorylation and expression of STAT-3. Addition of IL-6 and soluble IL-6R (sIL-6R) to the chondrogenic culture resulted in concentration-dependent increases in cartilage matrix accumulation and cartilage marker gene expression (type II collagen/aggrecan/type X collagen). Phosphorylation of the master transcription factor SOX9 was enhanced upon addition of IL-6 and sIL-6R. STAT-3 knockdown suppressed chondrogenic differentiation. IL-6 and the MSC markers CD166 and nestin were colocalized in macroscopically normal human cartilage taken from the lateral femoral compartment of knees with medial tibiofemoral osteoarthritis. CONCLUSION During differentiation of human MSCs into chondrocytes, the activation of IL-6/STAT-3 signaling positively regulated chondrogenic differentiation. The presence of IL-6 around MSC-like cells in the cartilage tissue was identified, suggesting that IL-6 contributes to homeostasis and cartilage self-repair by promoting chondrogenic differentiation.
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Affiliation(s)
- Masahiro Kondo
- University of Occupational and Environmental Health, Kitakyushu, Japan, and Mitsubishi Tanabe Pharma, Osaka, Japan
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Tsang KY, Tsang SW, Chan D, Cheah KSE. The chondrocytic journey in endochondral bone growth and skeletal dysplasia. ACTA ACUST UNITED AC 2015; 102:52-73. [PMID: 24677723 DOI: 10.1002/bdrc.21060] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2014] [Accepted: 02/23/2014] [Indexed: 12/29/2022]
Abstract
The endochondral bones of the skeleton develop from a cartilage template and grow via a process involving a cascade of chondrocyte differentiation steps culminating in formation of a growth plate and the replacement of cartilage by bone. This process of endochondral ossification, driven by the generation of chondrocytes and their subsequent proliferation, differentiation, and production of extracellular matrix constitute a journey, deviation from which inevitably disrupts bone growth and development, and is the basis of human skeletal dysplasias with a wide range of phenotypic severity, from perinatal lethality to progressively deforming. This highly coordinated journey of chondrocyte specification and fate determination is controlled by a myriad of intrinsic and extrinsic factors. SOX9 is the master transcription factor that, in concert with varying partners along the way, directs the different phases of the journey from mesenchymal condensation, chondrogenesis, differentiation, proliferation, and maturation. Extracellular signals, including bone morphogenetic proteins, wingless-related MMTV integration site (WNT), fibroblast growth factor, Indian hedgehog, and parathyroid hormone-related peptide, are all indispensable for growth plate chondrocytes to align and organize into the appropriate columnar architecture and controls their maturation and transition to hypertrophy. Chondrocyte hypertrophy, marked by dramatic volume increase in phases, is controlled by transcription factors SOX9, Runt-related transcription factor, and FOXA2. Hypertrophic chondrocytes mediate the cartilage to bone transition and concomitantly face a live-or-die situation, a subject of much debate. We review recent insights into the coordination of the phases of the chondrocyte journey, and highlight the need for a systems level understanding of the regulatory networks that will facilitate the development of therapeutic approaches for skeletal dysplasia.
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Affiliation(s)
- Kwok Yeung Tsang
- Department of Biochemistry, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong, China
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Chen H, Ghori-Javed FY, Rashid H, Adhami MD, Serra R, Gutierrez SE, Javed A. Runx2 regulates endochondral ossification through control of chondrocyte proliferation and differentiation. J Bone Miner Res 2014; 29:2653-65. [PMID: 24862038 PMCID: PMC4535340 DOI: 10.1002/jbmr.2287] [Citation(s) in RCA: 117] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/23/2013] [Revised: 05/08/2014] [Accepted: 05/21/2014] [Indexed: 12/12/2022]
Abstract
Synthesis of cartilage by chondrocytes is an obligatory step for endochondral ossification. Global deletion of the Runx2 gene results in complete failure of the ossification process, but the underlying cellular and molecular mechanisms are not fully known. Here, we elucidated Runx2 regulatory control distinctive to chondrocyte and cartilage tissue by generating Runx2 exon 8 floxed mice. Deletion of Runx2 gene in chondrocytes caused failure of endochondral ossification and lethality at birth. The limbs of Runx2(ΔE8/ΔE8) mice were devoid of mature chondrocytes, vasculature, and marrow. We demonstrate that the C-terminus of Runx2 drives its biological activity. Importantly, nuclear import and DNA binding functions of Runx2 are insufficient for chondrogenesis. Molecular studies revealed that despite normal levels of Sox9 and PTHrP, chondrocyte differentiation and cartilage growth are disrupted in Runx2(ΔE8/ΔE8) mice. Loss of Runx2 in chondrocytes also impaired osteoprotegerin-receptor activator of NF-κB ligand (OPG-RANKL) signaling and chondroclast development. Dwarfism observed in Runx2 mutants was associated with the near absence of proliferative zone in the growth plates. Finally, we show Runx2 directly regulates a unique set of cell cycle genes, Gpr132, Sfn, c-Myb, and Cyclin A1, to control proliferative capacity of chondrocyte. Thus, Runx2 is obligatory for both proliferation and differentiation of chondrocytes.
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Affiliation(s)
- Haiyan Chen
- Department of Oral and Maxillofacial Surgery, Institute of Oral Health Research, School of Dentistry, University of Alabama at Birmingham, Birmingham, AL, USA
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Zhou ZQ, Ota S, Deng C, Akiyama H, Hurlin PJ. Mutant activated FGFR3 impairs endochondral bone growth by preventing SOX9 downregulation in differentiating chondrocytes. Hum Mol Genet 2014; 24:1764-73. [PMID: 25432534 DOI: 10.1093/hmg/ddu594] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Fibroblast growth factor receptor 3 (FGFR3) plays a critical role in the control of endochondral ossification, and bone growth and mutations that cause hyperactivation of FGFR3 are responsible for a collection of developmental disorders that feature poor endochondral bone growth. FGFR3 is expressed in proliferating chondrocytes of the cartilaginous growth plate but also in chondrocytes that have exited the cell cycle and entered the prehypertrophic phase of chondrocyte differentiation. Achondroplasia disorders feature defects in chondrocyte proliferation and differentiation, and the defects in differentiation have generally been considered to be a secondary manifestation of altered proliferation. By initiating a mutant activated knockin allele of FGFR3 (FGFR3K650E) that causes Thanatophoric Dysplasia Type II (TDII) specifically in prehypertrophic chondrocytes, we show that mutant FGFR3 induces a differentiation block at this stage independent of any changes in proliferation. The differentiation block coincided with persistent expression of SOX9, the master regulator of chondrogenesis, and reducing SOX9 dosage allowed chondrocyte differentiation to proceed and significantly improved endochondral bone growth in TDII. These findings suggest that a proliferation-independent and SOX9-dependent differentiation block is a key driving mechanism responsible for poor endochondral bone growth in achondroplasia disorders caused by mutations in FGFR3.
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Affiliation(s)
- Zi-Qiang Zhou
- Shriners Hospitals for Children, 3101 SW Sam Jackson Park Road, Portland, OR 97239, USA
| | - Sara Ota
- Shriners Hospitals for Children, 3101 SW Sam Jackson Park Road, Portland, OR 97239, USA
| | - Chuxia Deng
- Genetics of Development and Disease Branch, National Institute of Diabetes, Digestive and Kidney Diseases, US National Institutes of Health, 10 Center Drive, Bethesda, MD 20892, USA
| | - Haruhiko Akiyama
- Department of Orthopedics, Gifu University, Gifu 501-1194, Japan
| | - Peter J Hurlin
- Shriners Hospitals for Children, 3101 SW Sam Jackson Park Road, Portland, OR 97239, USA, Department of Cell and Developmental Biology and Knight Cancer Institute, Oregon Health and Science University, 3181 SW Sam Jackson Park Road, Portland, OR 97239, USA
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Kondo M, Yamaoka K, Tanaka Y. Acquiring chondrocyte phenotype from human mesenchymal stem cells under inflammatory conditions. Int J Mol Sci 2014; 15:21270-85. [PMID: 25407530 PMCID: PMC4264224 DOI: 10.3390/ijms151121270] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2014] [Revised: 10/30/2014] [Accepted: 11/03/2014] [Indexed: 01/15/2023] Open
Abstract
An inflammatory milieu breaks down the cartilage matrix and induces chondrocyte apoptosis, resulting in cartilage destruction in patients with cartilage degenerative diseases, such as rheumatoid arthritis or osteoarthritis. Because of the limited regenerative ability of chondrocytes, defects in cartilage are irreversible and difficult to repair. Mesenchymal stem cells (MSCs) are expected to be a new tool for cartilage repair because they are present in the cartilage and are able to differentiate into multiple lineages of cells, including chondrocytes. Although clinical trials using MSCs for patients with cartilage defects have already begun, its efficacy and repair mechanisms remain unknown. A PubMed search conducted in October 2014 using the following medical subject headings (MeSH) terms: mesenchymal stromal cells, chondrogenesis, and cytokines resulted in 204 articles. The titles and abstracts were screened and nine articles relevant to “inflammatory” cytokines and “human” MSCs were identified. Herein, we review the cell biology and mechanisms of chondrocyte phenotype acquisition from human MSCs in an inflammatory milieu and discuss the clinical potential of MSCs for cartilage repair.
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Affiliation(s)
- Masahiro Kondo
- The First Department of Internal Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, Fukuoka 807-8555, Japan.
| | - Kunihiro Yamaoka
- The First Department of Internal Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, Fukuoka 807-8555, Japan.
| | - Yoshiya Tanaka
- The First Department of Internal Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu, Fukuoka 807-8555, Japan.
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