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Tan WH, Rücklin M, Larionova D, Ngoc TB, Joan van Heuven B, Marone F, Matsudaira P, Winkler C. A Collagen10a1 mutation disrupts cell polarity in a medaka model for metaphyseal chondrodysplasia type Schmid. iScience 2024; 27:109405. [PMID: 38510140 PMCID: PMC10952040 DOI: 10.1016/j.isci.2024.109405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 12/21/2023] [Accepted: 02/29/2024] [Indexed: 03/22/2024] Open
Abstract
Heterozygous mutations in COL10A1 lead to metaphyseal chondrodysplasia type Schmid (MCDS), a skeletal disorder characterized by epiphyseal abnormalities. Prior analysis revealed impaired trimerization and intracellular retention of mutant collagen type X alpha 1 chains as cause for elevated endoplasmic reticulum (ER) stress. However, how ER stress translates into structural defects remained unclear. We generated a medaka (Oryzias latipes) MCDS model harboring a 5 base pair deletion in col10a1, which led to a frameshift and disruption of 11 amino acids in the conserved trimerization domain. col10a1Δ633a heterozygotes recapitulated key features of MCDS and revealed early cell polarity defects as cause for dysregulated matrix secretion and deformed skeletal structures. Carbamazepine, an ER stress-reducing drug, rescued this polarity impairment and alleviated skeletal defects in col10a1Δ633a heterozygotes. Our data imply cell polarity dysregulation as a potential contributor to MCDS and suggest the col10a1Δ633a medaka mutant as an attractive MCDS animal model for drug screening.
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Affiliation(s)
- Wen Hui Tan
- Department of Biological Sciences and Centre for Bioimaging Sciences, National University of Singapore, Singapore 117543, Singapore
| | - Martin Rücklin
- Naturalis Biodiversity Center, Postbus 9517, 2300 RA Leiden, the Netherlands
| | - Daria Larionova
- Department of Biology, Research Group Evolutionary Developmental Biology, Ghent University, Ghent, Belgium
| | - Tran Bich Ngoc
- Department of Biological Sciences and Centre for Bioimaging Sciences, National University of Singapore, Singapore 117543, Singapore
| | | | - Federica Marone
- Swiss Light Source, Paul Scherrer Institut, CH-5232 Villigen, Switzerland
| | - Paul Matsudaira
- Department of Biological Sciences and Centre for Bioimaging Sciences, National University of Singapore, Singapore 117543, Singapore
| | - Christoph Winkler
- Department of Biological Sciences and Centre for Bioimaging Sciences, National University of Singapore, Singapore 117543, Singapore
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Raman R, Antony M, Nivelle R, Lavergne A, Zappia J, Guerrero-Limón G, Caetano da Silva C, Kumari P, Sojan JM, Degueldre C, Bahri MA, Ostertag A, Collet C, Cohen-Solal M, Plenevaux A, Henrotin Y, Renn J, Muller M. The Osteoblast Transcriptome in Developing Zebrafish Reveals Key Roles for Extracellular Matrix Proteins Col10a1a and Fbln1 in Skeletal Development and Homeostasis. Biomolecules 2024; 14:139. [PMID: 38397376 PMCID: PMC10886564 DOI: 10.3390/biom14020139] [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: 11/10/2023] [Revised: 01/05/2024] [Accepted: 01/11/2024] [Indexed: 02/25/2024] Open
Abstract
Zebrafish are now widely used to study skeletal development and bone-related diseases. To that end, understanding osteoblast differentiation and function, the expression of essential transcription factors, signaling molecules, and extracellular matrix proteins is crucial. We isolated Sp7-expressing osteoblasts from 4-day-old larvae using a fluorescent reporter. We identified two distinct subpopulations and characterized their specific transcriptome as well as their structural, regulatory, and signaling profile. Based on their differential expression in these subpopulations, we generated mutants for the extracellular matrix protein genes col10a1a and fbln1 to study their functions. The col10a1a-/- mutant larvae display reduced chondrocranium size and decreased bone mineralization, while in adults a reduced vertebral thickness and tissue mineral density, and fusion of the caudal fin vertebrae were observed. In contrast, fbln1-/- mutants showed an increased mineralization of cranial elements and a reduced ceratohyal angle in larvae, while in adults a significantly increased vertebral centra thickness, length, volume, surface area, and tissue mineral density was observed. In addition, absence of the opercle specifically on the right side was observed. Transcriptomic analysis reveals up-regulation of genes involved in collagen biosynthesis and down-regulation of Fgf8 signaling in fbln1-/- mutants. Taken together, our results highlight the importance of bone extracellular matrix protein genes col10a1a and fbln1 in skeletal development and homeostasis.
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Affiliation(s)
- Ratish Raman
- Laboratory for Organogenesis and Regeneration (LOR), GIGA Institute, University of Liège, 4000 Liège, Belgium; (R.R.); (M.A.); (R.N.); (G.G.-L.); (J.R.)
| | - Mishal Antony
- Laboratory for Organogenesis and Regeneration (LOR), GIGA Institute, University of Liège, 4000 Liège, Belgium; (R.R.); (M.A.); (R.N.); (G.G.-L.); (J.R.)
| | - Renaud Nivelle
- Laboratory for Organogenesis and Regeneration (LOR), GIGA Institute, University of Liège, 4000 Liège, Belgium; (R.R.); (M.A.); (R.N.); (G.G.-L.); (J.R.)
| | - Arnaud Lavergne
- GIGA Genomics Platform, B34, GIGA Institute, University of Liège, 4000 Liège, Belgium;
| | - Jérémie Zappia
- MusculoSKeletal Innovative Research Lab, Center for Interdisciplinary Research on Medicines, University of Liège, 4000 Liège, Belgium (Y.H.)
| | - Gustavo Guerrero-Limón
- Laboratory for Organogenesis and Regeneration (LOR), GIGA Institute, University of Liège, 4000 Liège, Belgium; (R.R.); (M.A.); (R.N.); (G.G.-L.); (J.R.)
| | - Caroline Caetano da Silva
- Hospital Lariboisière, Reference Centre for Rare Bone Diseases, INSERM U1132, Université de Paris-Cité, F-75010 Paris, France; (C.C.d.S.); (A.O.); (C.C.); (M.C.-S.)
| | - Priyanka Kumari
- Laboratory of Pharmaceutical and Analytical Chemistry, Department of Pharmacy, CIRM, Sart Tilman, 4000 Liège, Belgium;
| | - Jerry Maria Sojan
- Department of Life and Environmental Sciences, Università Politecnica delle Marche, Via Brecce Bianche, 60131 Ancona, Italy;
| | - Christian Degueldre
- GIGA CRC In Vivo Imaging, University of Liège, Sart Tilman, 4000 Liège, Belgium; (C.D.); (M.A.B.); (A.P.)
| | - Mohamed Ali Bahri
- GIGA CRC In Vivo Imaging, University of Liège, Sart Tilman, 4000 Liège, Belgium; (C.D.); (M.A.B.); (A.P.)
| | - Agnes Ostertag
- Hospital Lariboisière, Reference Centre for Rare Bone Diseases, INSERM U1132, Université de Paris-Cité, F-75010 Paris, France; (C.C.d.S.); (A.O.); (C.C.); (M.C.-S.)
| | - Corinne Collet
- Hospital Lariboisière, Reference Centre for Rare Bone Diseases, INSERM U1132, Université de Paris-Cité, F-75010 Paris, France; (C.C.d.S.); (A.O.); (C.C.); (M.C.-S.)
- UF de Génétique Moléculaire, Hôpital Robert Debré, APHP, F-75019 Paris, France
| | - Martine Cohen-Solal
- Hospital Lariboisière, Reference Centre for Rare Bone Diseases, INSERM U1132, Université de Paris-Cité, F-75010 Paris, France; (C.C.d.S.); (A.O.); (C.C.); (M.C.-S.)
| | - Alain Plenevaux
- GIGA CRC In Vivo Imaging, University of Liège, Sart Tilman, 4000 Liège, Belgium; (C.D.); (M.A.B.); (A.P.)
| | - Yves Henrotin
- MusculoSKeletal Innovative Research Lab, Center for Interdisciplinary Research on Medicines, University of Liège, 4000 Liège, Belgium (Y.H.)
| | - Jörg Renn
- Laboratory for Organogenesis and Regeneration (LOR), GIGA Institute, University of Liège, 4000 Liège, Belgium; (R.R.); (M.A.); (R.N.); (G.G.-L.); (J.R.)
| | - Marc Muller
- Laboratory for Organogenesis and Regeneration (LOR), GIGA Institute, University of Liège, 4000 Liège, Belgium; (R.R.); (M.A.); (R.N.); (G.G.-L.); (J.R.)
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Chen N, Wu RW, Lam Y, Chan WC, Chan D. Hypertrophic chondrocytes at the junction of musculoskeletal structures. Bone Rep 2023; 19:101698. [PMID: 37485234 PMCID: PMC10359737 DOI: 10.1016/j.bonr.2023.101698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 06/12/2023] [Accepted: 07/01/2023] [Indexed: 07/25/2023] Open
Abstract
Hypertrophic chondrocytes are found at unique locations at the junction of skeletal tissues, cartilage growth plate, articular cartilage, enthesis and intervertebral discs. Their role in the skeleton is best understood in the process of endochondral ossification in development and bone fracture healing. Chondrocyte hypertrophy occurs in degenerative conditions such as osteoarthritis. Thus, the role of hypertrophic chondrocytes in skeletal biology and pathology is context dependent. This review will focus on hypertrophic chondrocytes in endochondral ossification, in which they exist in a transient state, but acting as a central regulator of differentiation, mineralization, vascularization and conversion to bone. The amazing journey of a chondrocyte from being entrapped in the extracellular matrix environment to becoming proliferative then hypertrophic will be discussed. Recent studies on the dynamic changes and plasticity of hypertrophic chondrocytes have provided new insights into how we view these cells, not as terminally differentiated but as cells that can dedifferentiate to more progenitor-like cells in a transition to osteoblasts and adipocytes, as well as a source of skeletal stem and progenitor cells residing in the bone marrow. This will provide a foundation for studies of hypertrophic chondrocytes at other skeletal sites in development, tissue maintenance, pathology and therapy.
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Affiliation(s)
- Ning Chen
- School of Biomedical Sciences, The University of Hong Kong, Hong Kong, China
| | - Robin W.H. Wu
- School of Biomedical Sciences, The University of Hong Kong, Hong Kong, China
| | - Yan Lam
- School of Biomedical Sciences, The University of Hong Kong, Hong Kong, China
| | - Wilson C.W. Chan
- School of Biomedical Sciences, The University of Hong Kong, Hong Kong, China
- Department of Orthopaedics Surgery and Traumatology, The University of Hong Kong-Shenzhen Hospital (HKU-SZH), Shenzhen 518053, China
| | - Danny Chan
- School of Biomedical Sciences, The University of Hong Kong, Hong Kong, China
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Wu T, Jin Y, Chen F, Xuan X, Cao J, Liang Y, Wang Y, Zhan J, Zhao M, Huang C. Identification and characterization of bone/cartilage-associated signatures in common fibrotic skin diseases. Front Genet 2023; 14:1121728. [PMID: 37082197 PMCID: PMC10111020 DOI: 10.3389/fgene.2023.1121728] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Accepted: 03/22/2023] [Indexed: 04/07/2023] Open
Abstract
Background: Fibrotic skin diseases are characterized by excessive accumulation of the extracellular matrix (ECM) and activation of fibroblasts, leading to a global healthcare burden. However, effective treatments of fibrotic skin diseases remain limited, and their pathological mechanisms require further investigation. This study aims to investigate the common biomarkers and therapeutic targets in two major fibrotic skin diseases, namely, keloid and systemic sclerosis (SSc), by bioinformatics analysis.Methods: The keloid (GSE92566) and SSc (GSE95065) datasets were downloaded from the Gene Expression Omnibus (GEO) database. Differentially expressed genes (DEGs) were identified, followed by functional enrichment analysis using Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG). We then constructed a protein–protein interaction (PPI) network for the identification of hub genes. We explored the possibility of further functional enrichment analysis of hub genes on the Metascape, GeneMANIA, and TissueNexus platforms. Transcription factor (TF)–hub gene and miRNA–hub gene networks were established using NetworkAnalyst. We fixed GSE90051 and GSE76855 as the external validation datasets. Student’s t-test and receiver operating characteristic (ROC) curve were used for candidate hub gene validation. Hub gene expression was assessed in vitro by quantitative real-time PCR.Results: A total of 157 overlapping DEGs (ODEGs) were retrieved from the GSE92566 and GSE95065 datasets, and five hub genes (COL11A1, COL5A2, ASPN, COL10A1, and COMP) were identified and validated. Functional studies revealed that hub genes were predominantly enriched in bone/cartilage-related and collagen-related processes. FOXC1 and miR-335-5p were predicted to be master regulators at both transcriptional and post‐transcriptional levels.Conclusion: COL11A1, COL5A2, ASPN, COL10A1, and COMP may help understand the pathological mechanism of the major fibrotic skin diseases; moreover, FOXC1 and miR-355-5p could build a regulatory network in keloid and SSc.
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Affiliation(s)
- Ting Wu
- Department of Dermatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yifan Jin
- Department of Dermatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Fangqi Chen
- Department of Dermatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xiuyun Xuan
- Department of Dermatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Juanmei Cao
- Department of Dermatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yan Liang
- Department of Dermatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yuqing Wang
- Department of Dermatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jinshan Zhan
- Department of Dermatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Mengjie Zhao
- Department of Dermatology, Zhongnan Hospital of Wuhan University, Wuhan, China
- *Correspondence: Mengjie Zhao, ; Changzheng Huang,
| | - Changzheng Huang
- Department of Dermatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- *Correspondence: Mengjie Zhao, ; Changzheng Huang,
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Tüysüz B, Kasap B, Sarıtaş M, Alkaya DU, Bozlak S, Kıykım A, Durmaz A, Yıldırım T, Akpınar E, Apak H, Vural M. Natural history and genetic spectrum of the Turkish metaphyseal dysplasia cohort, including rare types caused by biallelic COL10A1, COL2A1, and LBR variants. Bone 2023; 167:116614. [PMID: 36400164 DOI: 10.1016/j.bone.2022.116614] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Revised: 10/28/2022] [Accepted: 11/11/2022] [Indexed: 11/17/2022]
Abstract
BACKGROUND Metaphyseal chondrodysplasias are a heterogeneous group of diseases characterized by short and bowed long bones and metaphyseal abnormality. The aim of this study is to investigate the genetic etiology and prognostic findings in patients with metaphyseal dysplasia. METHODS Twenty-four Turkish patients were included in this study and 13 of them were followed for 2-21 years. COL10A1, RMRP sequencing and whole exome sequencing were performed. RESULTS Results: Seven heterozygous pathogenic variants in COL10A1 were detected in 17 patients with Schmid type metaphyseal chondrodysplasia(MCDS). The phenotype was more severe in patients with heterozygous missense variants (one in signal peptide domain at the N-terminus of the protein, the other, class-1 group mutation at NC1 domain) compared to the patients with truncating variants. Short stature and coxa vara deformity appeared after 3 and 5 years of age, respectively, while large femoral head resolved after the age of 13 years in MCDS group. Interestingly, one patient with severe phenotype also had a biallelic missense variant in NC1 domain of COL10A1. Three patients with biallelic mutations in RMRP had prenatal onset short stature with short limb, and typical findings of cartilage hair hypoplasia (CHH). While immunodeficiency or recurrent infections were not observed, resistant congenital anemia was detected in one. Biallelic mutation in LBR was described in a patient with prenatal onset short stature, short and curved limb and metaphyseal abnormalities. Unlike previously reported patients, this patient had ectodermal findings, similar to CHH. A biallelic COL2A1 mutation was also found in the patient with lower limb deformities and metaphyseal involvement without vertebral and epiphyseal changes. CONCLUSION Long-term clinical characteristics are presented in a metaphyseal dysplasia cohort, including rare types caused by biallelic COL10A1, COL2A1, and LBR variants. We also point out that the domains where mutations on COL10A1 take place are important in the genotype-phenotype relationship.
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Affiliation(s)
- Beyhan Tüysüz
- Department of Pediatric Genetics, Istanbul University-Cerrahpasa, Cerrahpasa Medical Faculty, Istanbul, Turkey.
| | - Büşra Kasap
- Department of Pediatric Genetics, Istanbul University-Cerrahpasa, Cerrahpasa Medical Faculty, Istanbul, Turkey; Department of Genetics, Istanbul University, Aziz Sancar Institute of Experimental Medicine, Istanbul, Turkey
| | - Merve Sarıtaş
- Department of Pediatric Genetics, Istanbul University-Cerrahpasa, Cerrahpasa Medical Faculty, Istanbul, Turkey; Department of Genetics, Istanbul University, Aziz Sancar Institute of Experimental Medicine, Istanbul, Turkey
| | - Dilek Uludağ Alkaya
- Department of Pediatric Genetics, Istanbul University-Cerrahpasa, Cerrahpasa Medical Faculty, Istanbul, Turkey
| | - Serdar Bozlak
- Department of Pediatric Genetics, Istanbul University-Cerrahpasa, Cerrahpasa Medical Faculty, Istanbul, Turkey
| | - Ayça Kıykım
- Department of Pediatric Immunology and Allergy, Istanbul University-Cerrahpasa, Cerrahpasa Medical Faculty, Istanbul, Turkey
| | - Asude Durmaz
- Department of Medical Genetics, Faculty of Medicine, Ege University, Izmir, Turkey
| | - Timur Yıldırım
- Department of Orthopedics and Traumatology, University of Health Sciences Turkey, Baltalimani Bone Diseases Training and Research Center, Istanbul, Turkey
| | - Evren Akpınar
- Department of Orthopedics and Traumatology, University of Health Sciences Turkey, Baltalimani Bone Diseases Training and Research Center, Istanbul, Turkey
| | - Hilmi Apak
- Department of Pediatric Hematology, Istanbul University-Cerrahpasa, Cerrahpasa Medical Faculty, Istanbul, Turkey
| | - Mehmet Vural
- Department of Neonatology, Istanbul University-Cerrahpasa, Cerrahpasa Medical Faculty, Istanbul, Turkey
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Aktas SH, Taskin-Tok T, Al-Khafaji K, Akın-Balı DF. A detailed understanding of the COL10A1 and SOX9 genes interaction based on potentially damaging mutations in gastric cancer using computational techniques. J Biomol Struct Dyn 2022; 40:11533-11544. [PMID: 34380365 DOI: 10.1080/07391102.2021.1960194] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Gastric cancer (GC) has limited effective treatment options and is followed up with biomarkers that have insufficient sensitivity and specificity. Recent studies on Collagen Type X Alpha 1 Chain (COL10A1) show that the COL10A1 gene may be a diagnostic and/or prognostic biomarker for different cancer types. Moreover, its relationship with the Sex determining Region Y (SRY)-related High-Mobility Group (HMG) box (SOX9) gene which is also a transcription factor, was discovered recently, and co-expression of these two genes are associated with the development of GC. However, to the best of our knowledge, there is no study in the literature on how potential damaging mutations in the SOX9 and COL10A1 genes can affect their interactions. The aim of this study is to investigate the interactions of wild-type and potentially damaging mutated structures of COL10A1 and SOX9 genes. Thus, outputs for drug development and therapeutic strategies for GC can be obtained. For this purpose, structure validation and energy minimization analyses as well as docking and binding affinity calculations were performed. As a result, it was found that all investigated mutations (P563S, I588L, T624A, H165R and N110T) increased the binding affinity between the COL10A1-SOX9 complex, especially the N110T and H165R mutants in SOX9. As a conclusion, the N110T and H165R mutants in SOX9 may contribute to tumor progression. Therefore, it is important to consider these mutations for future therapeutic strategies.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Sedef Hande Aktas
- Vocational School of Health Services, Eskisehir Osmangazi University, Eskisehir, Turkey.,Department of Biotechnology and Biosafety, Graduate School of Natural and Applied Science, Eskisehir Osmangazi University, Eskisehir, Turkey
| | - Tugba Taskin-Tok
- Department of Chemistry, Faculty of Arts and Sciences, Gaziantep University, Gaziantep, Turkey.,Department of Bioinformatics and Computational Biology, Institute of Health Sciences, Gaziantep University, Gaziantep, Turkey
| | - Khattab Al-Khafaji
- Department of Chemistry, Faculty of Arts and Sciences, Gaziantep University, Gaziantep, Turkey
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Bian H, Zhu T, Liang Y, Hei R, Zhang X, Li X, Chen J, Lu Y, Gu J, Qiao L, Zheng Q. Expression Profiling and Functional Analysis of Candidate Col10a1 Regulators Identified by the TRAP Program. Front Genet 2021; 12:683939. [PMID: 34276786 PMCID: PMC8283764 DOI: 10.3389/fgene.2021.683939] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Accepted: 05/24/2021] [Indexed: 11/13/2022] Open
Abstract
Hypertrophic chondrocytes and their specific marker, the type X collagen gene (Col10a1), are critical components of endochondral bone formation during skeletal development. We previously found that Runx2 is an indispensable mouse Col10a1 gene regulator and identified many other transcription factors (TFs) that potentially interact with the 150-bp Col10a1 cis-enhancer. However, the roles of these candidate TFs in Col10a1 expression and chondrocyte hypertrophy have not been elucidated. Here, we focus on 32 candidate TFs recently identified by analyzing the 150-bp Col10a1 enhancer using the transcription factor affinity prediction (TRAP) program. We found that 12 TFs (Hoxa3, Lsx, Evx2, Dlx5, S8, Pax2, Egr2, Mef2a, Barhl2, GKlf, Sox17, and Crx) were significantly upregulated and four TFs (Lhx4, Tbx5, Mef2c, and Hb9) were significantly downregulated in hypertrophic MCT cells, which show upregulation of Col10a1 expression. Most of the differential expression pattern of these TFs conformed with the results obtained from ATDC5 cell model and primary mouse chondrocytes. Notably, Tbx5 was downregulated upon Col10a1 upregulation, overexpression of Tbx5 decreased Col10a1 expression, and knock-down of Tbx5 increased Col10a1 expression in hypertrophic chondrocytes, suggesting that Tbx5 is a negative regulator of Col10a1. We further generated a stable Tbx5-overexpressing ATDC5 cell line and ColX-Tbx5 transgenic mice driven by Col10a1-specific enhancers and promoters. Tbx5 overexpression decreased Col10a1 expression in ATDC5 cells cultured as early as day 7 and in limb tissue on post-natal day 1. Slightly weaker alkaline phosphatase staining was also observed in cell culture on day 7 and in limb digits on embryonic day 17.5, indicating mildly delayed ossification. Further characterization of these candidate Col10a1 transcriptional regulators could help identify novel therapeutic targets for skeletal diseases associated with abnormal chondrocyte hypertrophy.
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Affiliation(s)
- Huiqin Bian
- Department of Hematology and Hematological Laboratory Science, Jiangsu Key Laboratory of Medical Science and Laboratory Medicine, School of Medicine, Jiangsu University, Zhenjiang, China
| | - Ting Zhu
- Laboratory of Clinical Medicine, Huai'an Women & Children Hospital, Affiliated to Yangzhou University, Huai'an, China
| | - Yuting Liang
- Center of Clinical Laboratory, The First Affiliated Hospital of Soochow University, Suzhou, China
| | - Ruoxuan Hei
- Department of Hematology and Hematological Laboratory Science, Jiangsu Key Laboratory of Medical Science and Laboratory Medicine, School of Medicine, Jiangsu University, Zhenjiang, China
| | - Xiaojing Zhang
- Department of Hematology and Hematological Laboratory Science, Jiangsu Key Laboratory of Medical Science and Laboratory Medicine, School of Medicine, Jiangsu University, Zhenjiang, China
| | - Xiaochen Li
- Department of Hematology and Hematological Laboratory Science, Jiangsu Key Laboratory of Medical Science and Laboratory Medicine, School of Medicine, Jiangsu University, Zhenjiang, China
| | - Jinnan Chen
- Department of Hematology and Hematological Laboratory Science, Jiangsu Key Laboratory of Medical Science and Laboratory Medicine, School of Medicine, Jiangsu University, Zhenjiang, China
| | - Yaojuan Lu
- Department of Hematology and Hematological Laboratory Science, Jiangsu Key Laboratory of Medical Science and Laboratory Medicine, School of Medicine, Jiangsu University, Zhenjiang, China.,Shenzhen Academy of Peptide Targeting Technology at Pingshan and Shenzhen Tyercan Bio-Pharm Co., Ltd., Shenzhen, China
| | - Junxia Gu
- Department of Hematology and Hematological Laboratory Science, Jiangsu Key Laboratory of Medical Science and Laboratory Medicine, School of Medicine, Jiangsu University, Zhenjiang, China
| | - Longwei Qiao
- Suzhou Affiliated to State Key Laboratory of Reproductive Medicine, School of Gusu, The Affiliated Suzhou Hospital of Nanjing Medical University, Nanjing Medical University, Suzhou, China
| | - Qiping Zheng
- Department of Hematology and Hematological Laboratory Science, Jiangsu Key Laboratory of Medical Science and Laboratory Medicine, School of Medicine, Jiangsu University, Zhenjiang, China.,Shenzhen Academy of Peptide Targeting Technology at Pingshan and Shenzhen Tyercan Bio-Pharm Co., Ltd., Shenzhen, China
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8
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Wu H, Wang S, Li G, Yao Y, Wang N, Sun X, Fang L, Jiang X, Zhao J, Wang Y, Xu C. Characterization of a novel COL10A1 variant associated with Schmid-type metaphyseal chondrodysplasia and a literature review. Mol Genet Genomic Med 2021; 9:e1668. [PMID: 33764685 PMCID: PMC8172203 DOI: 10.1002/mgg3.1668] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2020] [Revised: 07/22/2020] [Accepted: 02/19/2021] [Indexed: 12/05/2022] Open
Abstract
Background Schmid‐type metaphyseal chondrodysplasia (SMCD) is a rare autosomal dominant skeletal dysplasia caused by heterozygous mutations in COL10A1, the gene which encodes collagen type X alpha 1 chain. However, its genotype–phenotype relationship has not been fully determined. Subjects and Methods The proband is a 2‐year‐old boy, born of non‐consanguineous Chinese parents. We conducted a systematic analysis of the clinical and radiological characteristics and a follow‐up study of the proband. Whole‐exome sequencing was applied for the genetic analysis, together with bioinformatic analysis of predicted consequences of the identified variant. A homotrimer model was built to visualize the affected region and predict possible outcomes of this variant. Furthermore, a literature review and genotype–phenotype analysis were performed by online searching all cases with SMCD. Results A novel heterozygous variant (NM_000493.4: c.1863_1866delAATG, NP_000484.2: p.(Met622 Thrfs*54)) was identified in COL10A1 gene in the affected child. And it was predicted to be pathogenic by in silico analysis. Protein modeling revealed that the variant was located in the NC1 domain, which was predicted to produce truncated collagen and impair the trimerization of collagen type X alpha 1 chain and combination with molecules in the matrix. Moreover, genotype–phenotype correlation analysis demonstrated that patients with truncating variants or variants in NC1 domain often presented earlier onset and severer symptoms compared with those with non‐truncating or variants in non‐NC1 domains. Conclusion The NC1 domain of COL10A1 was proved to be the hotspot region underlying SMCD, patients with variants in NC1 domain were more likely to present severer manifestations at an earlier age.
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Affiliation(s)
- Huixiao Wu
- Department of Endocrinology and Metabolism, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China.,Department of Endocrinology and Metabolism, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China.,Institute of Endocrinology, Shandong Academy of Clinical Medicine, Jinan, China.,Shandong Clinical Medical Center of Endocrinology and Metabolism, Jinan, China
| | - Shuping Wang
- Department of Endocrinology and Metabolism, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China.,Department of Endocrinology and Metabolism, Dongying people's Hospital, Dongying, China
| | - Guimei Li
- Department of Pediatric, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China
| | - Yangyang Yao
- Department of Pediatric Orthopedics, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China
| | - Ning Wang
- Institute of Endocrinology, Shandong Academy of Clinical Medicine, Jinan, China.,Shandong Clinical Medical Center of Endocrinology and Metabolism, Jinan, China
| | - Xiaoqing Sun
- Institute of Endocrinology, Shandong Academy of Clinical Medicine, Jinan, China.,Shandong Clinical Medical Center of Endocrinology and Metabolism, Jinan, China
| | - Li Fang
- Department of Endocrinology and Metabolism, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China.,Department of Endocrinology and Metabolism, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China.,Institute of Endocrinology, Shandong Academy of Clinical Medicine, Jinan, China.,Shandong Clinical Medical Center of Endocrinology and Metabolism, Jinan, China
| | - Xiuyun Jiang
- Department of Endocrinology and Metabolism, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China.,Department of Endocrinology and Metabolism, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China.,Institute of Endocrinology, Shandong Academy of Clinical Medicine, Jinan, China.,Shandong Clinical Medical Center of Endocrinology and Metabolism, Jinan, China
| | - Jiajun Zhao
- Department of Endocrinology and Metabolism, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China.,Department of Endocrinology and Metabolism, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China.,Institute of Endocrinology, Shandong Academy of Clinical Medicine, Jinan, China.,Shandong Clinical Medical Center of Endocrinology and Metabolism, Jinan, China
| | - Yanzhou Wang
- Department of Pediatric Orthopedics, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China
| | - Chao Xu
- Department of Endocrinology and Metabolism, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China.,Department of Endocrinology and Metabolism, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China.,Institute of Endocrinology, Shandong Academy of Clinical Medicine, Jinan, China.,Shandong Clinical Medical Center of Endocrinology and Metabolism, Jinan, China
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9
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Identification of two novel COL10A1 heterozygous mutations in two Chinese pedigrees with Schmid-type metaphyseal chondrodysplasia. BMC MEDICAL GENETICS 2019; 20:200. [PMID: 31856751 PMCID: PMC6923838 DOI: 10.1186/s12881-019-0937-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Accepted: 12/12/2019] [Indexed: 01/11/2023]
Abstract
Background Schmid-type metaphyseal chondrodysplasia (MCDS) is an autosomal dominant disorder caused by COL10A1 mutations, which is characterized by short stature, waddling gait, coxa vara and bowing of the long bones. However, descriptions of the expressivity of MCDS are rare. Methods Two probands and available family members affected with MCDS were subjected to clinical and radiological examination. Genomic DNA of all affected individuals was subjected to whole-exome sequencing, and candidate mutations were verified by Sanger sequencing in all available family members and in 250 healthy donors. A spatial model of the type X collagen (α1) C-terminal noncollagenous (NC1) domain was further constructed. Results We found that the phenotype of affected family members exhibited incomplete dominance. Mutation analysis indicated that there were two novel heterozygous missense mutations, [c.1765 T > A (p.Phe589Ile)] and [c.1846A > G (p.Lys616Glu)] in the COL10A1 gene in family 1 and 2, respectively. The two novel substitution sites were highly conserved and the mutations were predicted to be deleterious by in silico analysis. Furthermore, protein modeling revealed that the two substitutions were located in the NC1 domain of collagen X (α1), which potentially impacted the trimerization of collagen X (α1) and combination with molecules in the pericellular matrix. Conclusion Two novel mutations were identified in the present study, which will facilitate diagnosis of MCDS and further expand the spectrum of the COL10A1 mutations associated with MCDS patients. In addition, our research revealed the phenomenon of incomplete dominance in MCDS.
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10
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Chen Q, Wu SN, Chen YX, C SK, Zhang L, Wei HY, Kumar SA. A novel missense COL10A1 mutation: c.2020G>A; p. Gly674Arg linked with the bowed legs stature in the Schmid metaphyseal chondrodysplasia-affected Chinese lineage. Bone Rep 2019; 12:100240. [PMID: 31921940 PMCID: PMC6950639 DOI: 10.1016/j.bonr.2019.100240] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Revised: 12/09/2019] [Accepted: 12/12/2019] [Indexed: 11/22/2022] Open
Abstract
To evaluate the clinical-phenotypic characteristics of Schmid metaphyseal chondrodysplasia (SMCD) inflicted by a novel missense mutation of COL10A1 gene: c.2020G > A; p.Gly674Arg. A female child aged about 3 yrs. and 8 months was subjected to Radiograph test to validate the symptoms of SMCD. The polymorphism analysis by the next-generation sequencing (NGS) was performed using the peripheral blood DNA samples of the patient and other family inmates, including, the younger male sibling. The effect of the mutation on the non-collagenous carboxyl-terminal (NC1) domain of collagen X was studied using the SWISS-MODEL online server for trimer modelling; PROSA and PROCHECK-Ramachandran plot for structural validation; Mean Square Plot (RMSF) for structural rigidity. Radiograph examination of lower limbs confirmed the bowed legs in both the patient and her younger brother (study groups). The inheritance of the novel missense mutation of COL10A1: c.2020G > A; p.Gly674Arg (at chromosome-6q22.1) was confirmed in the study groups from the SMCD-affected mother. The extended interactions of the mutant-Arg674 with the Ser552 and Phe589 (β strand B) in the NC1 domain of α1(X) chain monomer is more likely to intervene its trimer formation by weakening the structural rigidity of the crucial strand H compared to its wild type. This plausibly deters the collagen X synthesis inflicting the bowed legs with the altered distal ulna bone morphology in the study groups. The inheritance of COL10A1 mutation: c.2020G > A; p.Gly674Arg has inflicted the SMCD with the characteristic bowed legs in the study groups. Radiograph and NGS could be a valid diagnostic module to initiate the treatment of SMCD. A novel missense COL10A1 mutation (c.2020G>A; p.Gly674Arg) of NC1 domain of collagen X preceding Schmid Metaphyseal Chondrodysplasia. COL10A1 mutation (p.Gly674Arg) and the disturbed trimer structure of α1(X) chain monomer of collagen X. COL10A1 mutation (p.Gly674Arg) and the reduced rigidity of α1(X) chain monomer of collagen X. The mutated NC1 domain of collagen X structure and the bowed legs stature. Cupping and fraying of the distal ulna bone regulated by the weakened rigidity of the α1(X) chain monomer of collagen X.
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Affiliation(s)
- Qiong Chen
- Department of Endocrinology and Metabolism, Henan provincial key laboratory of children's genetics and metabolic diseases, Henan children's hospital (Children's hospital affiliated to Zhengzhou University), No-33, Longhu Waihuan East road, Zhengzhou 450018, China
| | - Sheng-Nan Wu
- Department of Endocrinology and Metabolism, Henan provincial key laboratory of children's genetics and metabolic diseases, Henan children's hospital (Children's hospital affiliated to Zhengzhou University), No-33, Longhu Waihuan East road, Zhengzhou 450018, China
| | - Yong-Xing Chen
- Department of Endocrinology and Metabolism, Henan provincial key laboratory of children's genetics and metabolic diseases, Henan children's hospital (Children's hospital affiliated to Zhengzhou University), No-33, Longhu Waihuan East road, Zhengzhou 450018, China
| | - Selvaa Kumar C
- School of Biotechnology and Bioinformatics, D. Y. Patil Deemed to be University, Sector-15, CBD Belapur, Navi Mumbai 400614, India
| | - Lu Zhang
- Shanghai We-Health Biomedical Technology Co. Ltd, Shanghai 201315, China
| | - Hai-Yan Wei
- Department of Endocrinology and Metabolism, Henan provincial key laboratory of children's genetics and metabolic diseases, Henan children's hospital (Children's hospital affiliated to Zhengzhou University), No-33, Longhu Waihuan East road, Zhengzhou 450018, China
| | - Senthil Arun Kumar
- Department of Endocrinology and Metabolism, Henan provincial key laboratory of children's genetics and metabolic diseases, Henan children's hospital (Children's hospital affiliated to Zhengzhou University), No-33, Longhu Waihuan East road, Zhengzhou 450018, China
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11
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Holzer T, Probst K, Etich J, Auler M, Georgieva VS, Bluhm B, Frie C, Heilig J, Niehoff A, Nüchel J, Plomann M, Seeger JM, Kashkar H, Baris OR, Wiesner RJ, Brachvogel B. Respiratory chain inactivation links cartilage-mediated growth retardation to mitochondrial diseases. J Cell Biol 2019; 218:1853-1870. [PMID: 31085560 PMCID: PMC6548139 DOI: 10.1083/jcb.201809056] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Revised: 01/12/2019] [Accepted: 04/12/2019] [Indexed: 12/17/2022] Open
Abstract
Children with mitochondrial diseases often present with slow growth and short stature, but the underlying mechanism remains unclear. In this study, Holzer et al. provide in vivo evidence that mitochondrial respiratory chain dysfunction induces cartilage degeneration coincident with altered metabolism, impaired extracellular matrix formation, and cell death at the cartilage–bone junction. In childhood, skeletal growth is driven by transient expansion of cartilage in the growth plate. The common belief is that energy production in this hypoxic tissue mainly relies on anaerobic glycolysis and not on mitochondrial respiratory chain (RC) activity. However, children with mitochondrial diseases causing RC dysfunction often present with short stature, which indicates that RC activity may be essential for cartilage-mediated skeletal growth. To elucidate the role of the mitochondrial RC in cartilage growth and pathology, we generated mice with impaired RC function in cartilage. These mice develop normally until birth, but their later growth is retarded. A detailed molecular analysis revealed that metabolic signaling and extracellular matrix formation is disturbed and induces cell death at the cartilage–bone junction to cause a chondrodysplasia-like phenotype. Hence, the results demonstrate the overall importance of the metabolic switch from fetal glycolysis to postnatal RC activation in growth plate cartilage and explain why RC dysfunction can cause short stature in children with mitochondrial diseases.
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Affiliation(s)
- Tatjana Holzer
- Department of Pediatrics and Adolescent Medicine, Experimental Neonatology, Faculty of Medicine, University of Cologne, Cologne, Germany.,Center for Biochemistry, Faculty of Medicine, University of Cologne, Cologne, Germany
| | - Kristina Probst
- Department of Pediatrics and Adolescent Medicine, Experimental Neonatology, Faculty of Medicine, University of Cologne, Cologne, Germany.,Center for Biochemistry, Faculty of Medicine, University of Cologne, Cologne, Germany
| | - Julia Etich
- Department of Pediatrics and Adolescent Medicine, Experimental Neonatology, Faculty of Medicine, University of Cologne, Cologne, Germany.,Center for Biochemistry, Faculty of Medicine, University of Cologne, Cologne, Germany
| | - Markus Auler
- Department of Pediatrics and Adolescent Medicine, Experimental Neonatology, Faculty of Medicine, University of Cologne, Cologne, Germany.,Center for Biochemistry, Faculty of Medicine, University of Cologne, Cologne, Germany
| | - Veronika S Georgieva
- Department of Pediatrics and Adolescent Medicine, Experimental Neonatology, Faculty of Medicine, University of Cologne, Cologne, Germany.,Center for Biochemistry, Faculty of Medicine, University of Cologne, Cologne, Germany
| | - Björn Bluhm
- Department of Pediatrics and Adolescent Medicine, Experimental Neonatology, Faculty of Medicine, University of Cologne, Cologne, Germany.,Center for Biochemistry, Faculty of Medicine, University of Cologne, Cologne, Germany
| | - Christian Frie
- Department of Pediatrics and Adolescent Medicine, Experimental Neonatology, Faculty of Medicine, University of Cologne, Cologne, Germany.,Center for Biochemistry, Faculty of Medicine, University of Cologne, Cologne, Germany
| | - Juliane Heilig
- Institute of Biomechanics and Orthopedics, German Sport University Cologne, Cologne, Germany.,Cologne Center for Musculoskeletal Biomechanics, University of Cologne, Cologne, Germany
| | - Anja Niehoff
- Institute of Biomechanics and Orthopedics, German Sport University Cologne, Cologne, Germany.,Cologne Center for Musculoskeletal Biomechanics, University of Cologne, Cologne, Germany
| | - Julian Nüchel
- Center for Biochemistry, Faculty of Medicine, University of Cologne, Cologne, Germany
| | - Markus Plomann
- Center for Biochemistry, Faculty of Medicine, University of Cologne, Cologne, Germany
| | - Jens M Seeger
- Institute for Medical Microbiology, Immunology, and Hygiene, Faculty of Medicine, University of Cologne, Cologne, Germany
| | - Hamid Kashkar
- Institute for Medical Microbiology, Immunology, and Hygiene, Faculty of Medicine, University of Cologne, Cologne, Germany.,Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases, University of Cologne, Cologne, Germany.,Center of Molecular Medicine Cologne, University of Cologne, Cologne, Germany
| | - Olivier R Baris
- Center for Physiology and Pathophysiology, Institute of Vegetative Physiology, Faculty of Medicine, University of Cologne, Cologne, Germany
| | - Rudolf J Wiesner
- Center for Physiology and Pathophysiology, Institute of Vegetative Physiology, Faculty of Medicine, University of Cologne, Cologne, Germany.,Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases, University of Cologne, Cologne, Germany.,Center of Molecular Medicine Cologne, University of Cologne, Cologne, Germany
| | - Bent Brachvogel
- Department of Pediatrics and Adolescent Medicine, Experimental Neonatology, Faculty of Medicine, University of Cologne, Cologne, Germany .,Center for Biochemistry, Faculty of Medicine, University of Cologne, Cologne, Germany
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12
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Forouhan M, Sonntag S, Boot-Handford RP. Carbamazepine reduces disease severity in a mouse model of metaphyseal chondrodysplasia type Schmid caused by a premature stop codon (Y632X) in the Col10a1 gene. Hum Mol Genet 2019; 27:3840-3853. [PMID: 30010889 PMCID: PMC6216233 DOI: 10.1093/hmg/ddy253] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Accepted: 07/03/2018] [Indexed: 12/23/2022] Open
Abstract
Mutations, mostly in the region of the COL10A1 gene encoding the C-terminal non-collagenous domain, cause the dwarfism metaphyseal chondrodysplasia type Schmid (MCDS). In most cases, the disease mechanism involves the misfolding of the mutant protein causing increased endoplasmic reticulum (ER) stress and an unfolded protein response (UPR). However, in an iliac crest biopsy, the COL10A1 p.Y632X mutation was found to produce instability of the mutant mRNA such that little mutant protein may be produced. To investigate the disease mechanism further, a gene-targeted mouse model of the Col10a1 p.Y632X mutation was generated. In this model, the mutant mRNA showed no instability, and in mice heterozygous for the mutation, mutant and wild-type mRNAs were present at equal concentrations. The protein was translated from the mutant allele and retained within the cell, triggering increased ER stress and a UPR. The mutation produced a relatively severe form of MCDS. Nevertheless, treatment of the mice with carbamazepine (CBZ), a drug which stimulates intracellular proteolysis and alleviates ER stress, effectively reduced the disease severity in this model of MCDS caused by a premature stop codon in the Col10a1 gene. Specifically, the drug reduced ER stress in the growth plate, restored growth plate architecture toward the wild-type state, significantly increased bone growth and within 2 weeks of treatment corrected the MCDS-induced hip distortion. These results indicate that CBZ is likely to be effective in ongoing clinical trials against all forms of MCDS whether caused by premature stop codons or substitutions.
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Affiliation(s)
- Mitra Forouhan
- Wellcome Centre for Cell-Matrix Research, Faculty of Biology, Medicine and Health and Manchester Academic Health Science Centre, University of Manchester, Manchester, UK
| | | | - Raymond P Boot-Handford
- Wellcome Centre for Cell-Matrix Research, Faculty of Biology, Medicine and Health and Manchester Academic Health Science Centre, University of Manchester, Manchester, UK
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13
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Boot-Handford RP. Gene cloning to clinical trials-the trials and tribulations of a life with collagen. Int J Exp Pathol 2019; 100:4-11. [PMID: 30912609 DOI: 10.1111/iep.12311] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Revised: 02/19/2019] [Accepted: 02/24/2019] [Indexed: 12/17/2022] Open
Abstract
This review, based on the BSMB Fell-Muir Lecture I presented in July 2018 at the Matrix Biology Europe Conference in Manchester, gives a personal perspective of my own laboratory's contributions to research into type X collagen, metaphyseal chondrodysplasia type Schmid and potential treatments for this disorder that are currently entering clinical trial. I have tried to set the advances made in the context of the scientific technologies available at the time and how these have changed over the more than three decades of this research.
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Affiliation(s)
- Raymond P Boot-Handford
- Wellcome Centre for Cell-Matrix Research, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester, UK
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14
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Lamandé SR, Bateman JF. Genetic Disorders of the Extracellular Matrix. Anat Rec (Hoboken) 2019; 303:1527-1542. [PMID: 30768852 PMCID: PMC7318566 DOI: 10.1002/ar.24086] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Accepted: 10/26/2018] [Indexed: 12/11/2022]
Abstract
Mutations in the genes for extracellular matrix (ECM) components cause a wide range of genetic connective tissues disorders throughout the body. The elucidation of mutations and their correlation with pathology has been instrumental in understanding the roles of many ECM components. The pathological consequences of ECM protein mutations depend on its tissue distribution, tissue function, and on the nature of the mutation. The prevalent paradigm for the molecular pathology has been that there are two global mechanisms. First, mutations that reduce the production of ECM proteins impair matrix integrity largely due to quantitative ECM defects. Second, mutations altering protein structure may reduce protein secretion but also introduce dominant negative effects in ECM formation, structure and/or stability. Recent studies show that endoplasmic reticulum (ER) stress, caused by mutant misfolded ECM proteins, makes a significant contribution to the pathophysiology. This suggests that targeting ER‐stress may offer a new therapeutic strategy in a range of ECM disorders caused by protein misfolding mutations. Anat Rec, 2019. © 2019 The Authors. The Anatomical Record published by Wiley Periodicals, Inc. on behalf of American Association of Anatomists.
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Affiliation(s)
- Shireen R Lamandé
- Musculoskeletal Research, Murdoch Children's Research Institute, Royal Children's Hospital, Parkville Victoria, Australia.,Department of Paediatrics, University of Melbourne, Parkville Victoria, Australia
| | - John F Bateman
- Musculoskeletal Research, Murdoch Children's Research Institute, Royal Children's Hospital, Parkville Victoria, Australia.,Department of Biochemistry and Molecular Biology, University of Melbourne, Parkville Victoria, Australia
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15
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Schmid Type Metaphyseal Chondrodysplasia with a Novel COL10A1 Mutation. Indian J Pediatr 2019; 86:183-185. [PMID: 30209734 DOI: 10.1007/s12098-018-2791-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Accepted: 09/05/2018] [Indexed: 10/28/2022]
Abstract
Schmid type metaphyseal chondrodysplasia (SMCD) is a rare skeletal dysplasia, characterized by short stature, short limbs, bowing of the legs, and radiographic features of metaphyseal irregularities with fraying and splaying, more severe at the knee. It is caused by mutations of the COL10A1 gene. The authors present an Indian patient with a novel COL10A1 gene mutation.
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16
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Scheiber AL, Guess AJ, Kaito T, Abzug JM, Enomoto-Iwamoto M, Leikin S, Iwamoto M, Otsuru S. Endoplasmic reticulum stress is induced in growth plate hypertrophic chondrocytes in G610C mouse model of osteogenesis imperfecta. Biochem Biophys Res Commun 2018; 509:235-240. [PMID: 30579604 DOI: 10.1016/j.bbrc.2018.12.111] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2018] [Accepted: 12/14/2018] [Indexed: 12/21/2022]
Abstract
Osteogenesis imperfecta (OI) is a hereditary bone disorder most commonly caused by autosomal dominant mutations in genes encoding type I collagen. In addition to bone fragility, patients suffer from impaired longitudinal bone growth. It has been demonstrated that in OI, an accumulation of mutated type I collagen in the endoplasmic reticulum (ER) induces ER stress in osteoblasts, causing osteoblast dysfunction leading to bone fragility. We hypothesize that ER stress is also induced in the growth plate where bone growth is initiated, and examined a mouse model of dominant OI that carries a G610C mutation in the procollagen α2 chain. The results demonstrated that G610C OI mice had significantly shorter long bones with growth plate abnormalities including elongated total height and hypertrophic zone. Moreover, we found that mature hypertrophic chondrocytes expressed type I collagen and ER dilation was more pronounced compared to wild type littermates. The results from in vitro chondrocyte cultures demonstrated that the maturation of G610C OI hypertrophic chondrocytes was significantly suppressed and ER stress related genes were upregulated. Given that the alteration of hypertrophic chondrocyte activity often causes dwarfism, our findings suggest that hypertrophic chondrocyte dysfunction induced by ER stress may be an underlying cause of growth deficiency in G610C OI mice.
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Affiliation(s)
- Amanda L Scheiber
- Department of Orthopaedics, University of Maryland School of Medicine, Baltimore, MD, 21201, USA
| | - Adam J Guess
- Center for Childhood Cancer and Blood Diseases, The Research Institute at Nationwide Children's Hospital, Columbus, OH, 43205, USA
| | - Takashi Kaito
- Department of Orthopaedic Surgery, Osaka University, Graduate School of Medicine, Osaka, 565-0871, Japan
| | - Joshua M Abzug
- Department of Orthopaedics, University of Maryland School of Medicine, Baltimore, MD, 21201, USA
| | - Motomi Enomoto-Iwamoto
- Department of Orthopaedics, University of Maryland School of Medicine, Baltimore, MD, 21201, USA
| | - Sergey Leikin
- Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institute of Health, Bethesda, MD, 20892, USA
| | - Masahiro Iwamoto
- Department of Orthopaedics, University of Maryland School of Medicine, Baltimore, MD, 21201, USA
| | - Satoru Otsuru
- Department of Orthopaedics, University of Maryland School of Medicine, Baltimore, MD, 21201, USA; Center for Childhood Cancer and Blood Diseases, The Research Institute at Nationwide Children's Hospital, Columbus, OH, 43205, USA.
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17
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Forouhan M, Mori K, Boot-Handford RP. Paradoxical roles of ATF6α and ATF6β in modulating disease severity caused by mutations in collagen X. Matrix Biol 2018; 70:50-71. [PMID: 29522813 PMCID: PMC6090092 DOI: 10.1016/j.matbio.2018.03.004] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Revised: 03/02/2018] [Accepted: 03/03/2018] [Indexed: 01/05/2023]
Abstract
Whilst the role of ATF6α in modulating the unfolded protein response (UPR) has been well documented, the function of its paralogue ATF6β is less well understood. Using knockdown in cell culture and gene ablation in mice we have directly compared the roles of ATF6α & β in responding to the increased ER stress induced by mutant forms of type X collagen that cause the ER stress-associated metaphyseal chondrodysplasia type Schmid (MCDS). ATF6α more efficiently deals with the disease-associated ER stress in the absence of ATF6β and conversely, ATF6β is less effective in the absence of ATF6α. Furthermore, disease severity in vivo is increased by ATF6α ablation and decreased by ATF6β ablation. In addition, novel functions for each paralogue are described including an ATF6β-specific role in controlling growth plate chondrocyte proliferation. The clear demonstration of the intimate relationship of the two ATF6 isoforms and how ATF6β can moderate the activity of ATF6α and vice versa is of great significance for understanding the UPR mechanism. The activities of both ATF6 isoforms and their separate roles need consideration when deciding how to target increased ER stress as a means of treating MCDS and other ER stress-associated diseases.
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Affiliation(s)
- M Forouhan
- Wellcome Trust Centre for Cell-Matrix Research, Faculty of Biology, Medicine and Health, Manchester Academic Health Science Centre, Manchester, UK
| | - K Mori
- Department of Biophysics, Graduate School of Science, Kyoto University, Kyoto, Japan
| | - R P Boot-Handford
- Wellcome Trust Centre for Cell-Matrix Research, Faculty of Biology, Medicine and Health, Manchester Academic Health Science Centre, Manchester, UK.
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18
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Andrade AC, Jee YH, Nilsson O. New Genetic Diagnoses of Short Stature Provide Insights into Local Regulation of Childhood Growth
. Horm Res Paediatr 2018; 88:22-37. [PMID: 28334714 DOI: 10.1159/000455850] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Accepted: 01/03/2017] [Indexed: 12/12/2022] Open
Abstract
Idiopathic short stature is a common condition with a heterogeneous etiology. Advances in genetic methods, including genome sequencing techniques and bioinformatics approaches, have emerged as important tools to identify the genetic defects in families with monogenic short stature. These findings have contributed to the understanding of growth regulation and indicate that growth plate chondrogenesis, and therefore linear growth, is governed by a large number of genes important for different signaling pathways and cellular functions, including genetic defects in hormonal regulation, paracrine signaling, cartilage matrix, and fundamental cellular processes. In addition, mutations in the same gene can cause a wide phenotypic spectrum depending on the severity and mode of inheritance of the mutation.
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Affiliation(s)
- Anenisia C Andrade
- Division of Pediatric Endocrinology, Department of Women's and Children's Health, Karolinska Institutet and Karolinska University Hospital, Stockholm, Sweden
| | - Youn Hee Jee
- Section of Growth and Development, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland, USA
| | - Ola Nilsson
- Division of Pediatric Endocrinology, Department of Women's and Children's Health, Karolinska Institutet and Karolinska University Hospital, Stockholm, Sweden.,Department of Medical Sciences, Örebro University and University Hospital, Örebro, Sweden
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19
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Fidler AL, Boudko SP, Rokas A, Hudson BG. The triple helix of collagens - an ancient protein structure that enabled animal multicellularity and tissue evolution. J Cell Sci 2018; 131:jcs203950. [PMID: 29632050 PMCID: PMC5963836 DOI: 10.1242/jcs.203950] [Citation(s) in RCA: 85] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
The cellular microenvironment, characterized by an extracellular matrix (ECM), played an essential role in the transition from unicellularity to multicellularity in animals (metazoans), and in the subsequent evolution of diverse animal tissues and organs. A major ECM component are members of the collagen superfamily -comprising 28 types in vertebrates - that exist in diverse supramolecular assemblies ranging from networks to fibrils. Each assembly is characterized by a hallmark feature, a protein structure called a triple helix. A current gap in knowledge is understanding the mechanisms of how the triple helix encodes and utilizes information in building scaffolds on the outside of cells. Type IV collagen, recently revealed as the evolutionarily most ancient member of the collagen superfamily, serves as an archetype for a fresh view of fundamental structural features of a triple helix that underlie the diversity of biological activities of collagens. In this Opinion, we argue that the triple helix is a protein structure of fundamental importance in building the extracellular matrix, which enabled animal multicellularity and tissue evolution.
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Affiliation(s)
- Aaron L Fidler
- Department of Medicine, Division of Nephrology and Hypertension, Vanderbilt University Medical Center, Nashville, TN, 37232, USA
- Center for Matrix Biology, Vanderbilt University Medical Center, Nashville, TN, 37232, USA
| | - Sergei P Boudko
- Department of Medicine, Division of Nephrology and Hypertension, Vanderbilt University Medical Center, Nashville, TN, 37232, USA
- Center for Matrix Biology, Vanderbilt University Medical Center, Nashville, TN, 37232, USA
| | - Antonis Rokas
- Department of Biological Sciences, Vanderbilt University Medical Center, Nashville, TN, 37232, USA
| | - Billy G Hudson
- Department of Medicine, Division of Nephrology and Hypertension, Vanderbilt University Medical Center, Nashville, TN, 37232, USA
- Center for Matrix Biology, Vanderbilt University Medical Center, Nashville, TN, 37232, USA
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, TN, 37232, USA
- Department of Medical Education and Administration, Vanderbilt University Medical Center, Nashville, TN, 37232, USA
- Department of Cell and Developmental Biology, Vanderbilt University Medical Center, Nashville, TN, 37232, USA
- Department of Biochemistry, Vanderbilt University Medical Center, Nashville, TN, 37232, USA
- Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, TN, 37232, USA
- Vanderbilt Institute of Chemical Biology, Vanderbilt University Medical Center, Nashville, TN, 37232, USA
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20
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Zhang C, Liu J, Iqbal F, Lu Y, Mustafa S, Bukhari F, Lou H, Fu R, Wu Z, Yang X, Bukhari I, Aslam M, Xu S. A missense point mutation in COL10A1 identified with whole-genome deep sequencing in a 7-generation Pakistan dwarf family. Heredity (Edinb) 2017; 120:83-89. [PMID: 29234170 DOI: 10.1038/s41437-017-0021-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Revised: 10/10/2017] [Accepted: 10/11/2017] [Indexed: 02/07/2023] Open
Abstract
Disease-associated variants in the human genome are continually being identified using DNA sequencing technologies that are especially effective for Mendelian disorders. Here we sequenced whole genome to high coverage (>30×) of 6 members of a 7-generation family with dwarfism from a consanguineous tribe in Pakistan to determine the causal variant(s). We identified a missense variant rs111033552 (c.2011T>C [p.Ser671Pro]) located in COL10A1 (encodes the alpha chain of type X collagen) as the most likely contributor to the dwarfism. We further confirmed the variant in 22 family members using Sanger sequencing. All affected individuals are heterozygous for the missense mutation rs111033552 and no individual homozygous was observed. Moreover, the mutation was absent in 69,985 individuals representing >150 global populations. Taking advantage of whole-genome sequencing data, we also examined other variant forms, including copy number variation and insertion/deletion, but failed to identify such variants enriched in the affected individuals. Thus rs111033552 had priority for linkage with dwarfism.
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Affiliation(s)
- Chao Zhang
- Chinese Academy of Sciences (CAS) Key Laboratory of Computational Biology, Max Planck Independent Research Group on Population Genomics, CAS-MPG Partner Institute for Computational Biology (PICB), Shanghai Institutes for Biological Sciences, CAS, Shanghai, 200031, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Jiaojiao Liu
- Chinese Academy of Sciences (CAS) Key Laboratory of Computational Biology, Max Planck Independent Research Group on Population Genomics, CAS-MPG Partner Institute for Computational Biology (PICB), Shanghai Institutes for Biological Sciences, CAS, Shanghai, 200031, China.,School of Life Science and Technology, ShanghaiTech University, Shanghai, 201210, China
| | - Furhan Iqbal
- Department of Zoology, Institute of Pure and Applied Biology, Bahauddin Zakariya University Multan, Multan, Pakistan
| | - Yan Lu
- Chinese Academy of Sciences (CAS) Key Laboratory of Computational Biology, Max Planck Independent Research Group on Population Genomics, CAS-MPG Partner Institute for Computational Biology (PICB), Shanghai Institutes for Biological Sciences, CAS, Shanghai, 200031, China
| | - Saima Mustafa
- Department of Zoology, Institute of Pure and Applied Biology, Bahauddin Zakariya University Multan, Multan, Pakistan
| | - Firdous Bukhari
- Department of Zoology, Institute of Pure and Applied Biology, Bahauddin Zakariya University Multan, Multan, Pakistan
| | - Haiyi Lou
- Chinese Academy of Sciences (CAS) Key Laboratory of Computational Biology, Max Planck Independent Research Group on Population Genomics, CAS-MPG Partner Institute for Computational Biology (PICB), Shanghai Institutes for Biological Sciences, CAS, Shanghai, 200031, China
| | - Ruiqing Fu
- Chinese Academy of Sciences (CAS) Key Laboratory of Computational Biology, Max Planck Independent Research Group on Population Genomics, CAS-MPG Partner Institute for Computational Biology (PICB), Shanghai Institutes for Biological Sciences, CAS, Shanghai, 200031, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Zhendong Wu
- Chinese Academy of Sciences (CAS) Key Laboratory of Computational Biology, Max Planck Independent Research Group on Population Genomics, CAS-MPG Partner Institute for Computational Biology (PICB), Shanghai Institutes for Biological Sciences, CAS, Shanghai, 200031, China.,University of Chinese Academy of Sciences, Beijing, 100049, China.,School of Life Science and Technology, ShanghaiTech University, Shanghai, 201210, China
| | - Xiong Yang
- Chinese Academy of Sciences (CAS) Key Laboratory of Computational Biology, Max Planck Independent Research Group on Population Genomics, CAS-MPG Partner Institute for Computational Biology (PICB), Shanghai Institutes for Biological Sciences, CAS, Shanghai, 200031, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Ihtisham Bukhari
- Department of Biochemistry, Biomarkers Research Program Prince Mutaib Chair for Biomarkers of Osteoporosis, King Saud University, 11451, Riyadh, Saudi Arabia
| | - Muhammad Aslam
- Department of Zoology, Institute of Pure and Applied Biology, Bahauddin Zakariya University Multan, Multan, Pakistan
| | - Shuhua Xu
- Chinese Academy of Sciences (CAS) Key Laboratory of Computational Biology, Max Planck Independent Research Group on Population Genomics, CAS-MPG Partner Institute for Computational Biology (PICB), Shanghai Institutes for Biological Sciences, CAS, Shanghai, 200031, China. .,University of Chinese Academy of Sciences, Beijing, 100049, China. .,School of Life Science and Technology, ShanghaiTech University, Shanghai, 201210, China. .,Collaborative Innovation Center of Genetics and Development, Shanghai, 200438, China.
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21
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Mullan LA, Mularczyk EJ, Kung LH, Forouhan M, Wragg JM, Goodacre R, Bateman JF, Swanton E, Briggs MD, Boot-Handford RP. Increased intracellular proteolysis reduces disease severity in an ER stress-associated dwarfism. J Clin Invest 2017; 127:3861-3865. [PMID: 28920921 PMCID: PMC5617653 DOI: 10.1172/jci93094] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2017] [Accepted: 08/02/2017] [Indexed: 11/17/2022] Open
Abstract
The short-limbed dwarfism metaphyseal chondrodysplasia type Schmid (MCDS) is linked to mutations in type X collagen, which increase ER stress by inducing misfolding of the mutant protein and subsequently disrupting hypertrophic chondrocyte differentiation. Here, we show that carbamazepine (CBZ), an autophagy-stimulating drug that is clinically approved for the treatment of seizures and bipolar disease, reduced the ER stress induced by 4 different MCDS-causing mutant forms of collagen X in human cell culture. Depending on the nature of the mutation, CBZ application stimulated proteolysis of misfolded collagen X by either autophagy or proteasomal degradation, thereby reducing intracellular accumulation of mutant collagen. In MCDS mice expressing the Col10a1.pN617K mutation, CBZ reduced the MCDS-associated expansion of the growth plate hypertrophic zone, attenuated enhanced expression of ER stress markers such as Bip and Atf4, increased bone growth, and reduced skeletal dysplasia. CBZ produced these beneficial effects by reducing the MCDS-associated abnormalities in hypertrophic chondrocyte differentiation. Stimulation of intracellular proteolysis using CBZ treatment may therefore be a clinically viable way of treating the ER stress–associated dwarfism MCDS.
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Affiliation(s)
- Lorna A Mullan
- Wellcome Trust Centre for Cell-Matrix Research.,Faculty of Biology, Medicine and Health, and Manchester Academic Health Science Centre, Manchester, United Kingdom
| | - Ewa J Mularczyk
- Wellcome Trust Centre for Cell-Matrix Research.,Faculty of Biology, Medicine and Health, and Manchester Academic Health Science Centre, Manchester, United Kingdom
| | - Louise H Kung
- Wellcome Trust Centre for Cell-Matrix Research.,Faculty of Biology, Medicine and Health, and Manchester Academic Health Science Centre, Manchester, United Kingdom.,Murdoch Children's Research Institute, Parkville, Victoria, Australia
| | - Mitra Forouhan
- Wellcome Trust Centre for Cell-Matrix Research.,Faculty of Biology, Medicine and Health, and Manchester Academic Health Science Centre, Manchester, United Kingdom
| | - Jordan Ma Wragg
- Wellcome Trust Centre for Cell-Matrix Research.,Faculty of Biology, Medicine and Health, and Manchester Academic Health Science Centre, Manchester, United Kingdom
| | - Royston Goodacre
- School of Chemistry and Manchester Institute of Biotechnology, Faculty of Science and Engineering, University of Manchester, Manchester, United Kingdom
| | - John F Bateman
- Murdoch Children's Research Institute, Parkville, Victoria, Australia
| | - Eileithyia Swanton
- Faculty of Biology, Medicine and Health, and Manchester Academic Health Science Centre, Manchester, United Kingdom
| | - Michael D Briggs
- Institute of Genetic Medicine, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Raymond P Boot-Handford
- Wellcome Trust Centre for Cell-Matrix Research.,Faculty of Biology, Medicine and Health, and Manchester Academic Health Science Centre, Manchester, United Kingdom
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22
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Ain NU, Makitie O, Naz S. Autosomal recessive chondrodysplasia with severe short stature caused by a biallelic COL10A1 variant. J Med Genet 2017; 55:403-407. [PMID: 28830906 DOI: 10.1136/jmedgenet-2017-104885] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2017] [Revised: 08/04/2017] [Accepted: 08/04/2017] [Indexed: 12/22/2022]
Abstract
BACKGROUND Heterozygous mutations in COL10A1 underlie metaphyseal chondrodysplasia, Schmid type (MCDS), an autosomal dominant skeletal dysplasia. OBJECTIVE To identify the causative variant in a large consanguineous Pakistani family with severe skeletal dysplasia and marked lower limb deformity. METHODS Whole exome sequencing was completed followed by Sanger sequencing to verify segregation of the identified variants. In silico variant pathogenicity predictions and amino acid conservation analyses were performed. RESULTS A homozygous c.133 C>T (p.Pro45Ser) variant was identified in COL10A1 in all six severely affected individuals (adult heights 119-130 cm, mean ~-6.33 SD). The individuals heterozygous for the variant had mild phenotype of short stature (adult heights 140-162 cm, mean ~-2.15 SD) but no apparent skeletal deformities. The variant was predicted to be pathogenic by in silico prediction tools and was absent from public databases and hundred control chromosomes. Pro45 is conserved in orthologues and is located in the non-collagenous 2 domain of COL10A1, variants of which have never been associated with skeletal dysplasia. CONCLUSIONS This first report of individuals with a homozygous variant in COL10A1 defines a new type of autosomal recessive skeletal dysplasia. The observations in COL10A1 variant carriers suggest a phenotypic overlap between the mildest forms of MCDS and idiopathic short stature.
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Affiliation(s)
- Noor Ul Ain
- School of Biological Sciences, University of the Punjab, Lahore, Pakistan
| | - Outi Makitie
- Children's Hospital, University of Helsinki, Helsinki University Hospital, Helsinki, Finland.,Folkhälsan Institute of Genetics, Helsinki, Finland.,Department of Molecular Medicine and Surgery, Karolinska Institutet, Center for Molecular Medicine, Stockholm, Sweden
| | - Sadaf Naz
- School of Biological Sciences, University of the Punjab, Lahore, Pakistan
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23
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Gawron K. Endoplasmic reticulum stress in chondrodysplasias caused by mutations in collagen types II and X. Cell Stress Chaperones 2016; 21:943-958. [PMID: 27523816 PMCID: PMC5083666 DOI: 10.1007/s12192-016-0719-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2016] [Revised: 07/01/2016] [Accepted: 07/05/2016] [Indexed: 02/07/2023] Open
Abstract
The endoplasmic reticulum is primarily recognized as the site of synthesis and folding of secreted, membrane-bound, and some organelle-targeted proteins. An imbalance between the load of unfolded proteins and the processing capacity in endoplasmic reticulum leads to the accumulation of unfolded or misfolded proteins and endoplasmic reticulum stress, which is a hallmark of a number of storage diseases, including neurodegenerative diseases, a number of metabolic diseases, and cancer. Moreover, its contribution as a novel mechanistic paradigm in genetic skeletal diseases associated with abnormalities of the growth plates and dwarfism is considered. In this review, I discuss the mechanistic significance of endoplasmic reticulum stress, abnormal folding, and intracellular retention of mutant collagen types II and X in certain variants of skeletal chondrodysplasia.
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Affiliation(s)
- Katarzyna Gawron
- Microbiology Department, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, 30-387, Krakow, Poland.
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24
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Higuchi S, Takagi M, Shimomura S, Nishimura G, Hasegawa Y. A Japanese familial case of Schmid metaphyseal chondrodysplasia with a novel mutation in COL10A1. Clin Pediatr Endocrinol 2016; 25:107-10. [PMID: 27507912 PMCID: PMC4965511 DOI: 10.1297/cpe.25.107] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/15/2015] [Accepted: 04/06/2016] [Indexed: 11/28/2022] Open
Affiliation(s)
- Shinji Higuchi
- Department of Endocrinology and Metabolism, Tokyo Metropolitan Children's Medical Center, Tokyo, Japan
| | - Masaki Takagi
- Department of Endocrinology and Metabolism, Tokyo Metropolitan Children's Medical Center, Tokyo, Japan; Department of Pediatrics, Keio University School of Medicine, Tokyo, Japan
| | - Satoshi Shimomura
- Department of Orthopedics, Tokyo Metropolitan Children's Medical Center, Tokyo, Japan
| | - Gen Nishimura
- Department of Radiology, Tokyo Metropolitan Children's Medical Center, Tokyo, Japan
| | - Yukihiro Hasegawa
- Department of Endocrinology and Metabolism, Tokyo Metropolitan Children's Medical Center, Tokyo, Japan; Department of Pediatrics, Keio University School of Medicine, Tokyo, Japan
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25
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Kudelko M, Chan CWL, Sharma R, Yao Q, Lau E, Chu IK, Cheah KSE, Tanner JA, Chan D. Label-Free Quantitative Proteomics Reveals Survival Mechanisms Developed by Hypertrophic Chondrocytes under ER Stress. J Proteome Res 2015; 15:86-99. [DOI: 10.1021/acs.jproteome.5b00537] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
| | | | - Rakesh Sharma
- Department
of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Hong Kong, China
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26
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Caspases and osteogenic markers—in vitro screening of inhibition impact. In Vitro Cell Dev Biol Anim 2015; 52:144-8. [DOI: 10.1007/s11626-015-9964-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2015] [Accepted: 09/21/2015] [Indexed: 01/28/2023]
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27
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Park H, Hong S, Cho SI, Cho TJ, Choi IH, Jin DK, Sohn YB, Park SW, Cho HH, Cheon JE, Kim SY, Kim JY, Park SS, Seong MW. Case of mild Schmid-type metaphyseal chondrodysplasia with novel sequence variation involving an unusual mutational site of the COL10A1 gene. Eur J Med Genet 2015; 58:175-9. [DOI: 10.1016/j.ejmg.2014.12.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2014] [Accepted: 12/04/2014] [Indexed: 10/24/2022]
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28
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Hasegawa K, Higuchi Y, Yamashita M, Tanaka H. Japanese familial case with metaphyseal dysplasia, Schmid Type caused by the p.T555P mutation in the COL10A1 gene. Clin Pediatr Endocrinol 2015; 24:33-6. [PMID: 25678758 PMCID: PMC4322291 DOI: 10.1297/cpe.24.33] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2014] [Accepted: 09/23/2014] [Indexed: 11/05/2022] Open
Affiliation(s)
- Kosei Hasegawa
- Department of Pediatrics, Okayama University Hospital, Okayama, Japan
| | - Yosuke Higuchi
- Department of Pediatrics, Okayama University Hospital, Okayama, Japan
| | - Miho Yamashita
- Department of Pediatrics, Okayama University Hospital, Okayama, Japan
| | - Hiroyuki Tanaka
- Department of Pediatrics, Okayama University Hospital, Okayama, Japan ; Department of Pediatrics, Okayama Saiseikai General Hospital, Okayama, Japan
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29
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Lu Y, Qiao L, Lei G, Mira RR, Gu J, Zheng Q. Col10a1 gene expression and chondrocyte hypertrophy during skeletal development and disease. ACTA ACUST UNITED AC 2014. [DOI: 10.1007/s11515-014-1310-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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30
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Patterson SE, Dealy CN. Mechanisms and models of endoplasmic reticulum stress in chondrodysplasia. Dev Dyn 2014; 243:875-93. [DOI: 10.1002/dvdy.24131] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2013] [Revised: 03/10/2014] [Accepted: 03/17/2014] [Indexed: 12/14/2022] Open
Affiliation(s)
- Sara E. Patterson
- Center for Regenerative Medicine and Skeletal Development; Department of Reconstructive Sciences; University of Connecticut Health Center; Farmington Connecticut
| | - Caroline N. Dealy
- Center for Regenerative Medicine and Skeletal Development; Department of Reconstructive Sciences; University of Connecticut Health Center; Farmington Connecticut
- Center for Regenerative Medicine and Skeletal Development; Department of Orthopedic Surgery; University of Connecticut Health Center; Farmington Connecticut
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31
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Gong Q, Stump MR, Zhou Z. Position of premature termination codons determines susceptibility of hERG mutations to nonsense-mediated mRNA decay in long QT syndrome. Gene 2014; 539:190-7. [PMID: 24530480 DOI: 10.1016/j.gene.2014.02.012] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2013] [Revised: 02/01/2014] [Accepted: 02/10/2014] [Indexed: 01/26/2023]
Abstract
The degradation of human ether-a-go-go-related gene (hERG, KCNH2) transcripts containing premature termination codon (PTC) mutations by nonsense-mediated mRNA decay (NMD) is an important mechanism of long QT syndrome type 2 (LQT2). The mechanisms governing the recognition of PTC-containing hERG transcripts as NMD substrates have not been established. We used a minigene system to study two frameshift mutations, R1032Gfs 25 and D1037Rfs 82. R1032Gfs 25 introduces a PTC in exon 14, whereas D1037Rfs 82 causes a PTC in the last exon (exon 15). We showed that R1032Gfs 25, but not D1037Rfs 82, reduced the level of mutant mRNA compared to the wild-type minigene in an NMD-dependent manner. The deletion of intron 14 prevented degradation of R1032Gfs 25 mRNA indicating that a downstream intron is required for NMD. The recognition and elimination of PTC-containing transcripts by NMD required that the mutation be positioned >54-60 nt upstream of the 3'-most exon-exon junction. Finally, we used a full-length hERG splicing-competent construct to show that inhibition of downstream intron splicing by antisense morpholino oligonucleotides inhibited NMD and rescued the functional expression of a third LQT2 mutation, Y1078. The present study defines the positional requirements for the susceptibility of LQT2 mutations to NMD and posits that the majority of reported LQT2 nonsense and frameshift mutations are potential targets of NMD.
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Affiliation(s)
- Qiuming Gong
- Knight Cardiovascular Institute, Oregon Health & Science University, Portland, OR, USA
| | - Matthew R Stump
- Knight Cardiovascular Institute, Oregon Health & Science University, Portland, OR, USA
| | - Zhengfeng Zhou
- Knight Cardiovascular Institute, Oregon Health & Science University, Portland, OR, USA.
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32
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A molecular ensemble in the rER for procollagen maturation. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2013; 1833:2479-91. [DOI: 10.1016/j.bbamcr.2013.04.008] [Citation(s) in RCA: 80] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2013] [Revised: 04/06/2013] [Accepted: 04/08/2013] [Indexed: 01/18/2023]
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33
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Skeletal diseases caused by mutations that affect collagen structure and function. Int J Biochem Cell Biol 2013; 45:1556-67. [DOI: 10.1016/j.biocel.2013.05.017] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2013] [Revised: 05/13/2013] [Accepted: 05/14/2013] [Indexed: 12/15/2022]
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34
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Fang Y, Bateman JF, Mercer JF, Lamandé SR. Nonsense-mediated mRNA decay of collagen -emerging complexity in RNA surveillance mechanisms. J Cell Sci 2013; 126:2551-60. [PMID: 23729740 DOI: 10.1242/jcs.120220] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Nonsense-mediated mRNA decay (NMD) is an evolutionarily conserved mRNA surveillance system that degrades mRNA transcripts that harbour a premature translation-termination codon (PTC), thus reducing the synthesis of truncated proteins that would otherwise have deleterious effects. Although extensive research has identified a conserved repertoire of NMD factors, these studies have been performed with a restricted set of genes and gene constructs with relatively few exons. As a consequence, NMD mechanisms are poorly understood for genes with large 3' terminal exons, and the applicability of the current models to large multi-exon genes is not clear. In this Commentary, we present an overview of the current understanding of NMD and discuss how analysis of nonsense mutations in the collagen gene family has provided new mechanistic insights into this process. Although NMD of the collagen genes with numerous small exons is consistent with the widely accepted exon-junction complex (EJC)-dependent model, the degradation of Col10a1 transcripts with nonsense mutations cannot be explained by any of the current NMD models. Col10a1 NMD might represent a fail-safe mechanism for genes that have large 3' terminal exons. Defining the mechanistic complexity of NMD is important to allow us to understand the pathophysiology of the numerous genetic disorders caused by PTC mutations.
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Affiliation(s)
- Yiwen Fang
- Murdoch Childrens Research Institute, Royal Children's Hospital, Parkville 3052, Australia
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35
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Kung LHW, Rajpar MH, Briggs MD, Boot-Handford RP. Hypertrophic chondrocytes have a limited capacity to cope with increases in endoplasmic reticulum stress without triggering the unfolded protein response. J Histochem Cytochem 2012; 60:734-48. [PMID: 22859705 PMCID: PMC3524565 DOI: 10.1369/0022155412458436] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Mutations causing metaphyseal chondrodysplasia type Schmid (MCDS) (e.g., Col10a1p.N617K) induce the pathology by a mechanism involving increased endoplasmic reticulum (ER) stress triggering an unfolded protein response (UPR) in hypertrophic chondrocytes (Rajpar et al. 2009). Here we correlate the expression of mutant protein with the onset of the UPR and disease pathology (hypertrophic zone [HZ] expansion) in MCDS and ColXTgcog mouse lines from E14.5 to E17.5. Embryos homozygous for the Col10a1p.N617K mutation displayed a delayed secretion of mutant collagen X accompanied by a UPR at E14.5, delayed ossification of the primary center at E15.5, and an expanded HZ at E17.5. Heterozygote embryos expressed mutant collagen X from E14.5 but exhibited no evidence of a UPR or an HZ expansion until after E17.5. Embryos positive for the ER stress-inducing ColXTgcog allele expressed Tgcog at E14.5, but the onset of the UPR was not apparent until E15.5 in homozygous and E17.5 in hemizygous embryos. Only homozygous embryos exhibited an HZ expansion at E17.5. The differential onset of the UPR and pathology, dependent on mutation type and gene dosage, indicates that hypertrophic chondrocytes have a latent capacity to deal with ER stress, which must be exceeded to trigger the UPR and HZ expansion.
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Affiliation(s)
- Louise H W Kung
- Wellcome Trust Centre for Cell-Matrix Research, Faculty of Life Sciences, The University of Manchester, Manchester, United Kingdom
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36
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Boudko SP, Engel J, Bächinger HP. The crucial role of trimerization domains in collagen folding. Int J Biochem Cell Biol 2012; 44:21-32. [DOI: 10.1016/j.biocel.2011.09.009] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2011] [Revised: 09/27/2011] [Accepted: 09/27/2011] [Indexed: 10/17/2022]
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37
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A novel mutation leading to elongation of the deduced α1(X) chain results in Metaphyseal Chondrodysplasia type Schmid. Clin Chim Acta 2011; 412:1266-9. [DOI: 10.1016/j.cca.2011.03.026] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2011] [Accepted: 03/21/2011] [Indexed: 12/24/2022]
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38
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Schmid-type metaphyseal chondrodysplasia as the result of a collagen type X defect due to a novel COL10A1 nonsense mutation: A case report of a novel COL10A1 mutation. J Orthop Sci 2011; 16:245-9. [PMID: 21360259 DOI: 10.1007/s00776-011-0021-y] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/25/2009] [Accepted: 04/26/2010] [Indexed: 01/11/2023]
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39
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Mäkitie O, Susic M, Cole WG. Early-onset metaphyseal chondrodysplasia type Schmid associated with a COL10A1 frame-shift mutation and impaired trimerization of wild-type α1(X) protein chains. J Orthop Res 2010; 28:1497-501. [PMID: 20872587 DOI: 10.1002/jor.21161] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Both dominant-negative and haploinsufficiency effects have been proposed in the pathogenesis of metaphyseal chondrodysplasia type Schmid (MCDS) due to nonsense and frame-shift mutations of COL10A1. This study examines these alternative effects. A proband with typical early-onset MCDS was ascertained and COL10A1 sequencing undertaken. The assembly of trimeric collagen X molecules was studied using in vitro coupled transcription and translation of wild-type and mutant α1(X) cDNAs. The proband was heterozygous for a unique COL10A1 mutation, c.1735_1739del5ins22. Mutant protein chains, with the corresponding p.G579fsX611 change, failed to spontaneously trimerize. When wild-type α1(X) chains were translated alone, 57 ± 7% of the chains assembled into stable collagen X trimers. Trimerization of wild-type chains was significantly reduced to 33 ± 6% when translated in 1:1 mixtures with p.G579fsX611 α1(X) chains. The protein assembly assay showed that the mutant chains exerted a dominant-negative effect on collagen X assembly. Previous studies indicate that nonsense-mediated decay, activation of endoplasmic reticulum, and unfolded protein responses as well as altered chondrocyte differentiation are the major determinants of phenotypic severity and age of presentation. We speculate that complete loss of mutant transcripts yields COL10A1 haploinsufficiency and late clinical presentation while incomplete loss of mutant transcripts yields dominant-negative effects with early clinical presentation.
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Affiliation(s)
- Outi Mäkitie
- Department of Pediatrics, Hospital for Children and Adolescents, University of Helsinki, Helsinki, Finland.
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Tsang KY, Chan D, Bateman JF, Cheah KSE. In vivo cellular adaptation to ER stress: survival strategies with double-edged consequences. J Cell Sci 2010; 123:2145-54. [PMID: 20554893 DOI: 10.1242/jcs.068833] [Citation(s) in RCA: 99] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Disturbances to the balance of protein synthesis, folding and secretion in the endoplasmic reticulum (ER) induce stress and thereby the ER stress signaling (ERSS) response, which alleviates this stress. In this Commentary, we review the emerging idea that ER stress caused by abnormal physiological conditions and/or mutations in genes that encode client proteins of the ER is a key factor underlying different developmental processes and the pathology of diverse diseases, including diabetes, neurodegeneration and skeletal dysplasias. Recent studies in mouse models indicate that the effect of ERSS in vivo and the nature of the cellular strategies induced to ameliorate pathological ER stress are crucial factors in determining cell fate and clinical disease features. Importantly, ERSS can affect cellular proliferation and the differentiation program; cells that survive the stress can become 'reprogrammed' or dysfunctional. These cell-autonomous adaptation strategies can generate a spectrum of context-dependent cellular consequences, ranging from recovery to death. Secondary effects can include altered cell-extracellular-matrix interactions and non-cell-autonomous alteration of paracrine signaling, which contribute to the final phenotypic outcome. Recent reports showing that ER stress can be alleviated by chemical compounds suggest the potential for novel therapeutic approaches.
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Affiliation(s)
- Kwok Yeung Tsang
- Department of Biochemistry and Centre for Reproduction, Development and Growth, Li Ka Shing Faculty of Medicine, The University of Hong Kong, 21 Sassoon Road, Pokfulam, Hong Kong SAR, China
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Shimono C, Manabe RI, Yamada T, Fukuda S, Kawai J, Furutani Y, Tsutsui K, Ikenaka K, Hayashizaki Y, Sekiguchi K. Identification and characterization of nCLP2, a novel C1q family protein expressed in the central nervous system. J Biochem 2009; 147:565-79. [DOI: 10.1093/jb/mvp203] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Abstract
PURPOSE OF REVIEW To summarize the recent advances in our understanding of the majors genes involved in chondrogenesis and their molecular mechanisms. RECENT FINDINGS Disorders of the growth plate and the resulting skeletal dysplasias are a consequence of defects in genes involved in various stages of the chondrocyte proliferation and differentiation process. Recent identification of disease genes has provided insights into the pathophysiology of many skeletal dysplasias. SUMMARY This knowledge enhances our understanding of the physiology and pathophysiology of the growth plate. Many skeletal dysplasias can now be characterized at the molecular level, allowing clinicians to provide accurate molecular diagnoses and counseling. Further research in this area will likely provide insights into possible therapeutic options for disorders of the growth plate.
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Affiliation(s)
- Chanika Phornphutkul
- Department of Pediatrics, Rhode Island Hospital, Warren Alpert Medical School of Brown University, Providence, Rhode Island 02903, USA.
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Bilguvar K, DiLuna ML, Bizzarro MJ, Bayri Y, Schneider KC, Lifton RP, Gunel M, Ment LR. COL4A1 mutation in preterm intraventricular hemorrhage. J Pediatr 2009; 155:743-5. [PMID: 19840616 PMCID: PMC2884156 DOI: 10.1016/j.jpeds.2009.04.014] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/15/2008] [Revised: 03/05/2009] [Accepted: 04/08/2009] [Indexed: 11/29/2022]
Abstract
Intraventricular hemorrhage is a common complication of preterm infants. Mutations in the type IV procollagen gene, COL4A1, are associated with cerebral small vessel disease with hemorrhage in adults and fetuses. We report a rare variant in COL4A1 associated with intraventricular hemorrhage in dizygotic preterm twins. These results expand the spectrum of diseases attributable to mutations in type IV procollagens.
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MESH Headings
- Cerebral Hemorrhage/diagnostic imaging
- Cerebral Hemorrhage/genetics
- Collagen Type IV/genetics
- Diseases in Twins/diagnostic imaging
- Diseases in Twins/genetics
- Female
- Follow-Up Studies
- Gene Expression Regulation, Developmental
- Genetic Predisposition to Disease
- Gestational Age
- Humans
- Infant, Newborn
- Infant, Premature
- Infant, Premature, Diseases/diagnostic imaging
- Infant, Premature, Diseases/genetics
- Male
- Mutation
- Pregnancy
- Twins, Dizygotic
- Ultrasonography, Doppler, Transcranial
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The unfolded protein response and its relevance to connective tissue diseases. Cell Tissue Res 2009; 339:197-211. [PMID: 19851784 PMCID: PMC2784867 DOI: 10.1007/s00441-009-0877-8] [Citation(s) in RCA: 98] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2009] [Accepted: 09/03/2009] [Indexed: 12/13/2022]
Abstract
The unfolded protein response (UPR) has evolved to counter the stresses that occur in the endoplasmic reticulum (ER) as a result of misfolded proteins. This sophisticated quality control system attempts to restore homeostasis through the action of a number of different pathways that are coordinated in the first instance by the ER stress-senor proteins IRE1, ATF6 and PERK. However, prolonged ER-stress-related UPR can have detrimental effects on cell function and, in the longer term, may induce apoptosis. Connective tissue cells such as fibroblasts, osteoblasts and chondrocytes synthesise and secrete large quantities of proteins and mutations in many of these gene products give rise to heritable disorders of connective tissues. Until recently, these mutant gene products were thought to exert their effect through the assembly of a defective extracellular matrix that ultimately disrupted tissue structure and function. However, it is now becoming clear that ER stress and UPR, because of the expression of a mutant gene product, is not only a feature of, but may be a key mediator in the initiation and progression of a whole range of different connective tissue diseases. This review focuses on ER stress and the UPR that characterises an increasing number of connective tissue diseases and highlights novel therapeutic opportunities that may arise.
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Rajpar MH, McDermott B, Kung L, Eardley R, Knowles L, Heeran M, Thornton DJ, Wilson R, Bateman JF, Poulsom R, Arvan P, Kadler KE, Briggs MD, Boot-Handford RP. Targeted induction of endoplasmic reticulum stress induces cartilage pathology. PLoS Genet 2009; 5:e1000691. [PMID: 19834559 PMCID: PMC2757901 DOI: 10.1371/journal.pgen.1000691] [Citation(s) in RCA: 107] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2009] [Accepted: 09/17/2009] [Indexed: 12/21/2022] Open
Abstract
Pathologies caused by mutations in extracellular matrix proteins are generally considered to result from the synthesis of extracellular matrices that are defective. Mutations in type X collagen cause metaphyseal chondrodysplasia type Schmid (MCDS), a disorder characterised by dwarfism and an expanded growth plate hypertrophic zone. We generated a knock-in mouse model of an MCDS-causing mutation (COL10A1 p.Asn617Lys) to investigate pathogenic mechanisms linking genotype and phenotype. Mice expressing the collagen X mutation had shortened limbs and an expanded hypertrophic zone. Chondrocytes in the hypertrophic zone exhibited endoplasmic reticulum (ER) stress and a robust unfolded protein response (UPR) due to intracellular retention of mutant protein. Hypertrophic chondrocyte differentiation and osteoclast recruitment were significantly reduced indicating that the hypertrophic zone was expanded due to a decreased rate of VEGF-mediated vascular invasion of the growth plate. To test directly the role of ER stress and UPR in generating the MCDS phenotype, we produced transgenic mouse lines that used the collagen X promoter to drive expression of an ER stress-inducing protein (the cog mutant of thyroglobulin) in hypertrophic chondrocytes. The hypertrophic chondrocytes in this mouse exhibited ER stress with a characteristic UPR response. In addition, the hypertrophic zone was expanded, gene expression patterns were disrupted, osteoclast recruitment to the vascular invasion front was reduced, and long bone growth decreased. Our data demonstrate that triggering ER stress per se in hypertrophic chondrocytes is sufficient to induce the essential features of the cartilage pathology associated with MCDS and confirm that ER stress is a central pathogenic factor in the disease mechanism. These findings support the contention that ER stress may play a direct role in the pathogenesis of many connective tissue disorders associated with the expression of mutant extracellular matrix proteins.
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Affiliation(s)
- M. Helen Rajpar
- Wellcome Trust Centre for Cell-Matrix Research, Faculty of Life Sciences, The University of Manchester, Manchester, United Kingdom
| | - Ben McDermott
- Wellcome Trust Centre for Cell-Matrix Research, Faculty of Life Sciences, The University of Manchester, Manchester, United Kingdom
| | - Louise Kung
- Wellcome Trust Centre for Cell-Matrix Research, Faculty of Life Sciences, The University of Manchester, Manchester, United Kingdom
| | - Rachel Eardley
- Wellcome Trust Centre for Cell-Matrix Research, Faculty of Life Sciences, The University of Manchester, Manchester, United Kingdom
| | - Lynette Knowles
- Wellcome Trust Centre for Cell-Matrix Research, Faculty of Life Sciences, The University of Manchester, Manchester, United Kingdom
| | - Mel Heeran
- Wellcome Trust Centre for Cell-Matrix Research, Faculty of Life Sciences, The University of Manchester, Manchester, United Kingdom
| | - David J. Thornton
- Wellcome Trust Centre for Cell-Matrix Research, Faculty of Life Sciences, The University of Manchester, Manchester, United Kingdom
| | - Richard Wilson
- Musculoskeletal Disorders Theme, Murdoch Children's Research Institute, Royal Children's Hospital, Parkville, Victoria, Australia
| | - John F. Bateman
- Musculoskeletal Disorders Theme, Murdoch Children's Research Institute, Royal Children's Hospital, Parkville, Victoria, Australia
| | - Richard Poulsom
- Histopathology Unit, Cancer Research UK, London Research Institute, London, United Kingdom
| | - Peter Arvan
- Division of Metabolism, Endocrinology, and Diabetes, University of Michigan Medical School, Ann Arbor, Michigan, United States of America
| | - Karl E. Kadler
- Wellcome Trust Centre for Cell-Matrix Research, Faculty of Life Sciences, The University of Manchester, Manchester, United Kingdom
| | - Michael D. Briggs
- Wellcome Trust Centre for Cell-Matrix Research, Faculty of Life Sciences, The University of Manchester, Manchester, United Kingdom
| | - Raymond P. Boot-Handford
- Wellcome Trust Centre for Cell-Matrix Research, Faculty of Life Sciences, The University of Manchester, Manchester, United Kingdom
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Genetic diseases of connective tissues: cellular and extracellular effects of ECM mutations. Nat Rev Genet 2009; 10:173-83. [PMID: 19204719 DOI: 10.1038/nrg2520] [Citation(s) in RCA: 232] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Tissue-specific extracellular matrices (ECMs) are crucial for normal development and tissue function, and mutations in ECM genes result in a wide range of serious inherited connective tissue disorders. Mutations cause ECM dysfunction by combinations of two mechanisms. First, secretion of the mutated ECM components can be reduced by mutations affecting synthesis or by structural mutations causing cellular retention and/or degradation. Second, secretion of mutant protein can disturb crucial ECM interactions, structure and stability. Moreover, recent experiments suggest that endoplasmic reticulum (ER) stress, caused by mutant misfolded ECM proteins, contributes to the molecular pathology. Targeting ER stress might offer a new therapeutic strategy.
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48
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Gansner JM, Gitlin JD. Essential role for the alpha 1 chain of type VIII collagen in zebrafish notochord formation. Dev Dyn 2009; 237:3715-26. [PMID: 19035365 DOI: 10.1002/dvdy.21779] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Several zebrafish mutants identified in large-scale forward genetic screens exhibit notochord distortion. We now report the cloning and further characterization of one such mutant, gulliver(m208) (gul(m208)). The notochord defect in gul(m208) mutants is exacerbated under conditions of copper depletion or lysyl oxidase cuproenzyme inhibition that are without a notochord effect on wild-type embryos. The gul(m208) phenotype results from a missense mutation in the gene encoding Col8a1, a lysyl oxidase substrate, and morpholino knockdown of col8a1 recapitulates the notochord distortion observed in gul(m208) mutants. Of interest, the amino acid mutated in gul(m208) Col8a1 is highly conserved, and the equivalent substitution in a closely related human protein, COL10A1, causes Schmid metaphyseal chondrodysplasia. Taken together, the data identify a new protein essential for notochord morphogenesis, extend our understanding of gene-nutrient interactions in early development, and suggest that human mutations in COL8A1 may cause structural birth defects.
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Affiliation(s)
- John M Gansner
- Edward Mallinckrodt Department of Pediatrics, Washington University School of Medicine, St. Louis, Missouri, USA
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Tan JT, Kremer F, Freddi S, Bell KM, Baker NL, Lamandé SR, Bateman JF. Competency for nonsense-mediated reduction in collagen X mRNA is specified by the 3' UTR and corresponds to the position of mutations in Schmid metaphyseal chondrodysplasia. Am J Hum Genet 2008; 82:786-93. [PMID: 18304492 DOI: 10.1016/j.ajhg.2008.01.006] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2007] [Revised: 12/10/2007] [Accepted: 01/07/2008] [Indexed: 12/31/2022] Open
Abstract
Nonsense-mediated decay (NMD) is a eukaryotic cellular RNA surveillance and quality-control mechanism that degrades mRNA containing premature stop codons (nonsense mutations) that otherwise may exert a deleterious effect by the production of dysfunctional truncated proteins. Collagen X (COL10A1) nonsense mutations in Schmid-type metaphyseal chondrodysplasia are localized in a region toward the 3' end of the last exon (exon 3) and result in mRNA decay, in contrast to most other genes in which terminal-exon nonsense mutations are resistant to NMD. We introduce nonsense mutations into the mouse Col10a1 gene and express these in a hypertrophic-chondrocyte cell line to explore the mechanism of last-exon mRNA decay of Col10a1 and demonstrate that mRNA decay is spatially restricted to mutations occurring in a 3' region of the exon 3 coding sequence; this region corresponds to where human mutations have been described. This localization of mRNA-decay competency suggested that a downstream region, such as the 3' UTR, may play a role in specifying decay of mutant Col10a1 mRNA containing nonsense mutations. We found that deleting any of the three conserved sequence regions within the 3' UTR (region I, 23 bp; region II, 170 bp; and region III, 76 bp) prevented mutant mRNA decay, but a smaller 13 bp deletion within region III was permissive for decay. These data suggest that the 3' UTR participates in collagen X last-exon mRNA decay and that overall 3' UTR configuration, rather than specific linear-sequence motifs, may be important in specifying decay of Col10a1 mRNA containing nonsense mutations.
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Tsang KY, Chan D, Cheslett D, Chan WCW, So CL, Melhado IG, Chan TWY, Kwan KM, Hunziker EB, Yamada Y, Bateman JF, Cheung KMC, Cheah KSE. Surviving endoplasmic reticulum stress is coupled to altered chondrocyte differentiation and function. PLoS Biol 2007; 5:e44. [PMID: 17298185 PMCID: PMC1820825 DOI: 10.1371/journal.pbio.0050044] [Citation(s) in RCA: 147] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2006] [Accepted: 12/13/2006] [Indexed: 11/19/2022] Open
Abstract
In protein folding and secretion disorders, activation of endoplasmic reticulum (ER) stress signaling (ERSS) protects cells, alleviating stress that would otherwise trigger apoptosis. Whether the stress-surviving cells resume normal function is not known. We studied the in vivo impact of ER stress in terminally differentiating hypertrophic chondrocytes (HCs) during endochondral bone formation. In transgenic mice expressing mutant collagen X as a consequence of a 13-base pair deletion in Col10a1 (13del), misfolded α1(X) chains accumulate in HCs and elicit ERSS. Histological and gene expression analyses showed that these chondrocytes survived ER stress, but terminal differentiation is interrupted, and endochondral bone formation is delayed, producing a chondrodysplasia phenotype. This altered differentiation involves cell-cycle re-entry, the re-expression of genes characteristic of a prehypertrophic-like state, and is cell-autonomous. Concomitantly, expression of Col10a1 and 13del mRNAs are reduced, and ER stress is alleviated. ERSS, abnormal chondrocyte differentiation, and altered growth plate architecture also occur in mice expressing mutant collagen II and aggrecan. Alteration of the differentiation program in chondrocytes expressing unfolded or misfolded proteins may be part of an adaptive response that facilitates survival and recovery from the ensuing ER stress. However, the altered differentiation disrupts the highly coordinated events of endochondral ossification culminating in chondrodysplasia. The assembly and folding of secreted proteins in the endoplasmic reticulum (ER) is exquisitely regulated by a complex mechanism that maintains an equilibrium between folded and unfolded proteins. Perturbation of this homeostasis induces ER stress, which, if not alleviated through ER stress signaling (ERSS), ultimately triggers cell death. Normal bone growth occurs through a highly coordinated differentiation program that yields specialized cartilage cells (chondrocytes); when this program is disrupted, chondrodysplasia, or malformed skeletons, can result. Chondrodysplasias caused by mutations that affect protein assembly and secretion are characterized by a disorganization of bony growth plates and distension of the ER. We tested whether these chondrodysplasia characteristics were linked to ERSS. By investigating the impact of ER stress on the cell fate of hypertrophic chondrocytes (HCs) in transgenic mice expressing mutations in collagen that prevent proper folding, we revealed a novel adaptive mechanism that helps alleviate the unfolded protein load. Instead of undergoing apoptosis, the HCs undergoing ER stress adapt, re-enter the cell cycle, and revert to a less-mature state in which expression of the mutant collagen is reduced. Our findings have broad implications for adaptive mechanisms to ER stress in vivo and for the pathophysiology underlying chondrodysplasias caused by mutations that impact on protein assembly and secretion. When subjected to ER stress (by expression of misfolded or unfolded proteins), hypertrophic chondrocytes undergo alterations to their developmental program that may be part of an adaptive response.
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Affiliation(s)
- Kwok Yeung Tsang
- Department of Biochemistry, University of Hong Kong, Pokfulam, Hong Kong, China
| | - Danny Chan
- Department of Biochemistry, University of Hong Kong, Pokfulam, Hong Kong, China
| | - Deborah Cheslett
- Department of Biochemistry, University of Hong Kong, Pokfulam, Hong Kong, China
| | - Wilson C. W Chan
- Department of Biochemistry, University of Hong Kong, Pokfulam, Hong Kong, China
| | - Chi Leong So
- Department of Biochemistry, University of Hong Kong, Pokfulam, Hong Kong, China
| | - Ian G Melhado
- Department of Biochemistry, University of Hong Kong, Pokfulam, Hong Kong, China
| | - Tori W. Y Chan
- Department of Biochemistry, University of Hong Kong, Pokfulam, Hong Kong, China
| | - Kin Ming Kwan
- Department of Biochemistry, University of Hong Kong, Pokfulam, Hong Kong, China
| | - Ernst B Hunziker
- ITI Research Institute for Dental and Skeletal Biology, University of Bern, Bern, Switzerland
| | - Yoshihiko Yamada
- Craniofacial Developmental Biology and Regeneration Branch, National Institute of Dental and Craniofacial Research, Bethesda, Maryland, United States of America
| | - John F Bateman
- Murdoch Childrens Research Institute, Royal Children's Hospital, Melbourne, Victoria, Australia
- Department of Paediatrics, University of Melbourne, Melbourne, Victoria, Australia
| | - Kenneth M. C Cheung
- Department of Orthopaedics and Traumatology, University of Hong Kong, Pokfulam, Hong Kong, China
| | - Kathryn S. E Cheah
- Department of Biochemistry, University of Hong Kong, Pokfulam, Hong Kong, China
- * To whom correspondence should be addressed. E-mail:
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