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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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Houck CA, Koopmans M, Nikkels PGJ. The Radiological and Histological Phenotype of Skeletal Abnormalities in Fetal ARCN1-Related Syndrome. Pediatr Dev Pathol 2024; 27:176-180. [PMID: 38044464 PMCID: PMC11015707 DOI: 10.1177/10935266231213785] [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] [Indexed: 12/05/2023]
Abstract
Mutations in ARCN1 give rise to a syndromic disorder with rhizomelic short stature with microretrognathia and developmental delay. ARCN1 encodes the delta subunit of the coat protein I complex, which is required for intracellular trafficking of collagen 1 and which may also be involved in the endoplasmic reticulum (ER) stress response. In this paper we describe for the first time the skeletal histological abnormalities in an 18-week-old fetus with an ARCN1 mutation, and we suggest that the skeletal phenotype in ARCN1-related syndrome has more resemblance with ER stress than with a defect in collagen 1 metabolism.
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Affiliation(s)
- Charlotte A. Houck
- Department of Pathology, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Marije Koopmans
- Department of Clinical Genetics, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Peter G. J. Nikkels
- Department of Pathology, University Medical Center Utrecht, Utrecht, The Netherlands
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Woo SH, Mo YJ, Lee YI, Park JH, Hwang D, Park TJ, Kang HY, Park SC, Lee YS. ANT2 Accelerates Cutaneous Wound Healing in Aged Skin by Regulating Energy Homeostasis and Inflammation. J Invest Dermatol 2023; 143:2295-2310.e17. [PMID: 37211200 DOI: 10.1016/j.jid.2023.05.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Revised: 04/26/2023] [Accepted: 05/05/2023] [Indexed: 05/23/2023]
Abstract
An effective healing response is critical to healthy aging. In particular, energy homeostasis has become increasingly recognized as a factor in effective skin regeneration. ANT2 is a mediator of adenosine triphosphate import into mitochondria for energy homeostasis. Although energy homeostasis and mitochondrial integrity are critical for wound healing, the role played by ANT2 in the repair process had not been elucidated to date. In our study, we found that ANT2 expression decreased in aged skin and cellular senescence. Interestingly, overexpression of ANT2 in aged mouse skin accelerated the healing of full-thickness cutaneous wounds. In addition, upregulation of ANT2 in replicative senescent human diploid dermal fibroblasts induced their proliferation and migration, which are critical processes in wound healing. Regarding energy homeostasis, ANT2 overexpression increased the adenosine triphosphate production rate by activating glycolysis and induced mitophagy. Notably, ANT2-mediated upregulation of HSPA6 in aged human diploid dermal fibroblasts downregulated proinflammatory genes that mediate cellular senescence and mitochondrial damage. This study shows a previously uncharacterized physiological role of ANT2 in skin wound healing by regulating cell proliferation, energy homeostasis, and inflammation. Thus, our study links energy metabolism to skin homeostasis and reports, to the best of our knowledge, a previously unreported genetic factor that enhances wound healing in an aging model.
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Affiliation(s)
- Seung-Hwa Woo
- Department of New Biology, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu, Republic of Korea
| | - Yun Jeong Mo
- Well Aging Research Center, Division of Biotechnology, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu, Republic of Korea
| | - Yun-Il Lee
- Well Aging Research Center, Division of Biotechnology, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu, Republic of Korea
| | - Ji Hwan Park
- Department of New Biology, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu, Republic of Korea
| | - Daehee Hwang
- Department of Biological Sciences, Seoul National University, Seoul, Republic of Korea
| | - Tae Jun Park
- Department of Biochemistry and Molecular Biology, Ajou University School of Medicine, Suwon, Republic of Korea; Institution of Inflamm-aging Translational Research Center, Ajou University School of Medicine, Suwon, Republic of Korea
| | - Hee Young Kang
- Institution of Inflamm-aging Translational Research Center, Ajou University School of Medicine, Suwon, Republic of Korea; Department of Dermatology, Ajou University School of Medicine, Suwon, Republic of Korea
| | - Sang Chul Park
- The Future Life & Society Research Center, Advanced Institute of Aging Science, Chonnam National University, Gwangju, Republic of Korea
| | - Young-Sam Lee
- Department of New Biology, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu, Republic of Korea; Well Aging Research Center, Division of Biotechnology, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu, Republic of Korea.
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Liu Z, Huang J, Wang X, Deng S, Zhou J, Gong Z, Li X, Wang Y, Yang J, Hu Y. Dapagliflozin suppress endoplasmic reticulum stress mediated apoptosis of chondrocytes by activating Sirt1. Chem Biol Interact 2023; 384:110724. [PMID: 37741535 DOI: 10.1016/j.cbi.2023.110724] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Revised: 09/15/2023] [Accepted: 09/20/2023] [Indexed: 09/25/2023]
Abstract
OBJECTIVE Osteoarthritis (OA) is a common joint disease characterized by inflammation and cartilage degeneration. Accumulating evidences support that endoplasmic reticulum (ER) stress induced OA chondrocytes apoptosis. The hypoglycemic and anti-inflammatory properties render Dapagliflozin (DAPA) effective in reducing ER stress on cells. However, its impact and potential mechanisms on the OA pathology are still obscure. The present study aimed to investigate whether DAPA attenuates ER stress in chondrocytes by activating sirt1 and delays the progression of OA. METHODS In vitro, we first investigated the effect of DAPA on chondrocytes viability with IL-1β or not for 24 or 48 h. Then, chondrocytes were treated with 10 ng/ml IL-1β and 10 μM dapagliflozin with10 μM thapsigargin, 5 μM SRT1460 or not. Chondrocytes apoptosis in each group were detected by Tunel staining and flow cytometric. Immunofluorescence staining was applied to quantify the expression levels of cleaved caspase-3, Sirt1 and CHOP in chondrocytes. Inhibition of ER stress in chondrocytes associated with sirt1 activation were verified by PCR and western blotting. In addition, the effects of DAPA on cartilage were validated by a series of experiments in OA rat model, such as micro-CT, histological and immunohistochemical assay. RESULTS The data demonstrated that DAPA alleviates IL-1β induced ER stress related chondrocytes apoptosis, and PCR and western blotting data confirmed that DAPA inhibits the PERK-eIF2α-CHOP pathway by activating Sirt1. Besides, immunohistochemical results showed that DAPA enhanced the expression of Sirt1 and Collagen II in OA rats, and inhibited the expression of CHOP and cleaved caspase-3. Meanwhile, histological staining and micro-CT photography also confirmed that DAPA alleviated inflammation and cartilage degeneration in OA rat. CONCLUSIONS The study demonstrated the relationship of ER stress and inflammation in the progression of OA, and verified that DAPA could inhibit PERK-eIF2α-CHOP axis of the ER stress response by activating Sirt1 in IL-1β treated rat chondrocytes and potentially prevent the OA development.
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Affiliation(s)
- Zilin Liu
- Department of Orthopedics, Renmin Hospital of Wuhan University, Wuhan, 430060, Hubei Province, PR China; Central Laboratory, Renmin Hospital of Wuhan University, Wuhan, 430060, Hubei Province, PR China
| | - Jun Huang
- Department of Orthopedics, Renmin Hospital of Wuhan University, Wuhan, 430060, Hubei Province, PR China; Central Laboratory, Renmin Hospital of Wuhan University, Wuhan, 430060, Hubei Province, PR China
| | - Xuezhong Wang
- Department of Orthopedics, Renmin Hospital of Wuhan University, Wuhan, 430060, Hubei Province, PR China; Central Laboratory, Renmin Hospital of Wuhan University, Wuhan, 430060, Hubei Province, PR China
| | - Shuang Deng
- Department of Orthopedics, Renmin Hospital of Wuhan University, Wuhan, 430060, Hubei Province, PR China; Central Laboratory, Renmin Hospital of Wuhan University, Wuhan, 430060, Hubei Province, PR China
| | - Jianlin Zhou
- Department of Orthopedics, Renmin Hospital of Wuhan University, Wuhan, 430060, Hubei Province, PR China; Central Laboratory, Renmin Hospital of Wuhan University, Wuhan, 430060, Hubei Province, PR China
| | - Ziheng Gong
- Department of Orthopedics, Renmin Hospital of Wuhan University, Wuhan, 430060, Hubei Province, PR China; Central Laboratory, Renmin Hospital of Wuhan University, Wuhan, 430060, Hubei Province, PR China
| | - Xuyang Li
- Department of Orthopedics, Renmin Hospital of Wuhan University, Wuhan, 430060, Hubei Province, PR China; Central Laboratory, Renmin Hospital of Wuhan University, Wuhan, 430060, Hubei Province, PR China
| | - Yanjie Wang
- Department of Orthopedics, Renmin Hospital of Wuhan University, Wuhan, 430060, Hubei Province, PR China; Central Laboratory, Renmin Hospital of Wuhan University, Wuhan, 430060, Hubei Province, PR China
| | - Jian Yang
- Department of Orthopedics, Renmin Hospital of Wuhan University, Wuhan, 430060, Hubei Province, PR China; Central Laboratory, Renmin Hospital of Wuhan University, Wuhan, 430060, Hubei Province, PR China.
| | - Yong Hu
- Department of Orthopedics, Renmin Hospital of Wuhan University, Wuhan, 430060, Hubei Province, PR China; Central Laboratory, Renmin Hospital of Wuhan University, Wuhan, 430060, Hubei Province, PR China.
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Redhead C, Taye N, Hubmacher D. En route towards a personalized medicine approach: Innovative therapeutic modalities for connective tissue disorders. Matrix Biol 2023; 122:46-54. [PMID: 37657665 PMCID: PMC10529529 DOI: 10.1016/j.matbio.2023.08.005] [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: 06/28/2023] [Revised: 08/25/2023] [Accepted: 08/27/2023] [Indexed: 09/03/2023]
Abstract
Connective tissue disorders can be caused by pathogenic variants (mutations) in genes encoding extracellular matrix (ECM) proteins. Such disorders typically manifest during development or postnatal growth and result in significant morbidity and mortality. The development of curative treatments for connective tissue disorders is hampered in part by the inability of many mature connective tissues to efficiently regenerate. To be most effective, therapeutic strategies designed to preserve or restore tissue function will likely need to be initiated during phases of significant endogenous connective tissue remodeling and organ sculpting postnatally and directly target the underlying ECM protein mutations. With recent advances in whole exome sequencing, in-vitro and in-vivo disease modeling, and the development of mutation-specific molecular therapeutic modalities, it is now feasible to directly correct disease-causing mutations underlying connective tissue disorders and ameliorate their pathogenic consequences. These technological advances may lead to potentially curative personalized medicine approaches for connective tissue disorders that have previously been considered incurable. In this review, we highlight innovative therapeutic modalities including gene replacement, exon skipping, DNA/mRNA editing, and pharmacological approaches that were used to preserve or restore tissue function in the context of connective tissue disorders. Inherent to a successful application of these approaches is the need to deepen the understanding of mechanisms that regulate ECM formation and homeostasis, and to decipher how individual mutations in ECM proteins compromise ECM and connective tissue development and function.
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Affiliation(s)
- Charlene Redhead
- Orthopedic Research Laboratories, Leni & Peter W. May Department of Orthopaedics, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
| | - Nandaraj Taye
- Orthopedic Research Laboratories, Leni & Peter W. May Department of Orthopaedics, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
| | - Dirk Hubmacher
- Orthopedic Research Laboratories, Leni & Peter W. May Department of Orthopaedics, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA.
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Iyer S, Adams DJ. Bone and the Unfolded Protein Response: In Sickness and in Health. Calcif Tissue Int 2023; 113:96-109. [PMID: 37243756 PMCID: PMC10326125 DOI: 10.1007/s00223-023-01096-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Accepted: 05/08/2023] [Indexed: 05/29/2023]
Abstract
Differentiation and optimal function of osteoblasts and osteoclasts are contingent on synthesis and maintenance of a healthy proteome. Impaired and/or altered secretory capacity of these skeletal cells is a primary driver of most skeletal diseases. The endoplasmic reticulum (ER) orchestrates the folding and maturation of membrane as well as secreted proteins at high rates within a calcium rich and oxidative organellar niche. Three ER membrane proteins monitor fidelity of protein processing in the ER and initiate an intricate signaling cascade known as the Unfolded Protein Response (UPR) to remediate accumulation of misfolded proteins in its lumen, a condition referred to as ER stress. The UPR aids in fine-tuning, expanding and/or modifying the cellular proteome, especially in specialized secretory cells, to match everchanging physiologic cues and metabolic demands. Sustained activation of the UPR due to chronic ER stress, however, is known to hasten cell death and drive pathophysiology of several diseases. A growing body of evidence suggests that ER stress and an aberrant UPR may contribute to poor skeletal health and the development of osteoporosis. Small molecule therapeutics that target distinct components of the UPR may therefore have implications for developing novel treatment modalities relevant to the skeleton. This review summarizes the complexity of UPR actions in bone cells in the context of skeletal physiology and osteoporotic bone loss, and highlights the need for future mechanistic studies to develop novel UPR therapeutics that mitigate adverse skeletal outcomes.
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Affiliation(s)
- Srividhya Iyer
- Department of Orthopedics, University of Colorado Anschutz Medical Campus, 12800 E 19th Ave, Mailstop:8343, Aurora, CO, 80045, USA.
| | - Douglas J Adams
- Department of Orthopedics, University of Colorado Anschutz Medical Campus, 12800 E 19th Ave, Mailstop:8343, Aurora, CO, 80045, USA
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Saltarelli MA, Quarta A, Chiarelli F. Growth plate extracellular matrix defects and short stature in children. Ann Pediatr Endocrinol Metab 2022; 27:247-255. [PMID: 36567461 PMCID: PMC9816467 DOI: 10.6065/apem.2244120.060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Accepted: 06/29/2022] [Indexed: 12/27/2022] Open
Abstract
Many etiological factors causing short stature have already been identified in humans. In the last few years, the advent of new techniques for the detection of chromosomal and molecular abnormalities has made it possible to better identify patients with genetic causes of growth failure. Some of these factors directly affect the development and growth of the skeleton, since they damage the epiphyseal growth plate, where linear growth occurs, influencing chondrogenesis. In particular, defects in genes involved in the organization and function of the growth plate are responsible for several well-known conditions with short stature. These genes play a pivotal role in various mechanisms involving the extracellular matrix, intracellular signaling, paracrine signaling, endocrine signaling, and epigenetic regulation. In this review, we will discuss the genes involved in extracellular matrix disorders. The identification of genetic defects in linear growth failure is important for clinicians and researchers in order to improve the care of children affected by growth disorders.
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Affiliation(s)
| | - Alessia Quarta
- Department of Pediatrics, University of Chieti, Chieti, Italy
| | - Francesco Chiarelli
- Department of Pediatrics, University of Chieti, Chieti, Italy,Address for correspondence: Francesco Chiarelli Department of Pediatrics, University of Chieti, Via dei Vestini, 5 Chieti, I-66100, Italy
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8
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Yu X, Xu X, Dong W, Yang C, Luo Y, He Y, Jiang C, Wu Y, Wang J. DDIT3/CHOP mediates the inhibitory effect of ER stress on chondrocyte differentiation by AMPKα-SIRT1 pathway. BIOCHIMICA ET BIOPHYSICA ACTA. MOLECULAR CELL RESEARCH 2022; 1869:119265. [PMID: 35381294 DOI: 10.1016/j.bbamcr.2022.119265] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Revised: 03/26/2022] [Accepted: 03/30/2022] [Indexed: 06/14/2023]
Abstract
Endoplasmic reticulum (ER) stress is an evolutionarily conserved cellular stress response related to multiple diseases, including temporomandibular joint (TMJ) cartilage-related diseases. Recent studies have indicated that DDIT3/CHOP (a downstream transcription factor of ER stress) is an important effector in mediating ER stress to inhibit chondrogenesis. However, the underlying mechanism by which DDIT3 regulates chondrogenesis remains unclear. In this study, tunicamycin (an ER stress agonist)-induced ER stress inhibited chondrocyte differentiation and matrix synthesis in vitro and led to an osteoarthritis-like phenotype in mouse TMJ cartilage. Meanwhile, DDIT3 expression in chondrocytes was robustly upregulated. Loss-of-function experiments validated the inhibiting effect of DDIT3 on chondrocyte differentiation and matrix synthesis. Mechanistically, the inhibiting effect was attributed to the direct and indirect regulatory effect of DDIT3 on SIRT1 (sirtuin1, silent mating type information regulation protein type 1, a member of NAD+ dependent class III histone deacetylases). On one hand, DDIT3 directly promoted the transcription of SIRT1. On the other hand, DDIT3 indirectly increased the expression of SIRT1 by promoting AMPKα phosphorylation and activation. Furthermore, activation of AMPKα or SIRT1 with the corresponding agonist AICAR or resveratrol in the DDIT3-knockdown cells partially restored the inhibiting effect of DDIT3 on chondrocyte differentiation and matrix synthesis. Collectively, these novel findings indicate that DDIT3 regulates the inhibitory effect of ER stress on chondrocyte differentiation and matrix synthesis partially via the AMPKα-SIRT1 pathway. A thorough understanding of ER stress in regulating chondrocyte homeostasis and its role in the onset of osteoarthritis may be promising to develop therapeutic targets and prevent condyle cartilage destruction.
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Affiliation(s)
- Xijie Yu
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, Hubei 430079, China
| | - Xiaoxiao Xu
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, Hubei 430079, China
| | - Wei Dong
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, Hubei 430079, China
| | - Chang Yang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, Hubei 430079, China
| | - Yao Luo
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, Hubei 430079, China
| | - Ying He
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, Hubei 430079, China
| | - Chenxi Jiang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, Hubei 430079, China; Department of Stomatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430022, China
| | - Yanru Wu
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, Hubei 430079, China
| | - Jiawei Wang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, Hubei 430079, China.
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Dreier R, Ising T, Ramroth M, Rellmann Y. Estradiol Inhibits ER Stress-Induced Apoptosis in Chondrocytes and Contributes to a Reduced Osteoarthritic Cartilage Degeneration in Female Mice. Front Cell Dev Biol 2022; 10:913118. [PMID: 35669511 PMCID: PMC9163336 DOI: 10.3389/fcell.2022.913118] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Accepted: 05/03/2022] [Indexed: 01/29/2023] Open
Abstract
Gender differences are a common finding in osteoarthritis (OA). This may result from a differential response of males and females to endoplasmic reticulum (ER) stress in articular chondrocytes. We have previously described that ER stress in cartilage-specific ERp57 KO mice (ERp57 cKO) favors the development of knee OA, since this stress condition cannot be adequately compensated in articular chondrocytes with increasing age leading to the induction of apoptotic cell death and subsequent cartilage degeneration. The aim of this study was to enlighten gender-specific differences in ER stress, apoptosis, and OA development in ERp57 cKO mice. The analyses were extended by in vitro studies on the influence of estradiol in CRISPR/Cas9-generated C28/I2 ERp57 knock out (KO) and WT cells. ER stress was evaluated by immunofluorescence analysis of the ER stress markers calnexin (Cnx) and binding-immunoglobulin protein (BiP), also referred to as glucose-regulating protein 78 (GRP78) in vivo and in vitro. Apoptotic cell death was investigated by a commercially available cell death detection ELISA and TUNEL assay. OA development in mice was analyzed by toluidine blue staining of paraffin-embedded knee cartilage sections and quantified by OARSI-Scoring. Cell culture studies exhibited a reduction of ER stress and ER stress-induced apoptosis in C28/I2 cells in presence of physiological estradiol concentrations. This is consistent with a slower increase in age-related ER stress and a reduced number of apoptotic chondrocytes in female mice compared to male littermates contributing to a reduced osteoarthritic cartilage degeneration in female mice. Taken together, this study demonstrates that the female sex hormone estradiol can reduce ER stress and ER stress-induced apoptosis in articular chondrocytes, thus minimizing critical events favoring osteoarthritic cartilage degeneration. Therefore, the inhibition of ER stress through a modulation of effects induced by female sex hormones appears to be attractive for OA therapy.
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Abstract
Evidence from genetic studies in human and mice indicates that defective skeletal development is one of the major phenotypic outcomes for aberrant UPR signaling. Visualization of morphological alterations in whole-mount skeleton and protein secretion and UPR activation on tissue sections is the very first step to investigate skeletal phenotypes of UPR-related mouse models. In this chapter, we introduce the major techniques that have been frequently used in our laboratory to study UPR-induced skeletal disorders with genetically modified mice and provide descriptive directions of mouse genotyping, bone tissue grossing, whole-mount skeletal staining, immunostaining assays of matrix secretion, and UPR activation.
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Affiliation(s)
- Chao Zheng
- Institute of Orthopedic Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Cheng Wang
- School of Biomedical Sciences, University of Hong Kong, Pok Fu Lam, Hong Kong, China
| | - Qiang Jie
- Department of Orthopedic Surgery, HongHui Hospital, Xi'an Jiaotong University, College of Medicine, Xi'an, China.
| | - Liu Yang
- Institute of Orthopedic Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an, China.
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11
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Rellmann Y, Eidhof E, Hansen U, Fleischhauer L, Vogel J, Clausen-Schaumann H, Aszodi A, Dreier R. ER Stress in ERp57 Knockout Knee Joint Chondrocytes Induces Osteoarthritic Cartilage Degradation and Osteophyte Formation. Int J Mol Sci 2021; 23:ijms23010182. [PMID: 35008608 PMCID: PMC8745280 DOI: 10.3390/ijms23010182] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Revised: 12/14/2021] [Accepted: 12/22/2021] [Indexed: 12/14/2022] Open
Abstract
Ageing or obesity are risk factors for protein aggregation in the endoplasmic reticulum (ER) of chondrocytes. This condition is called ER stress and leads to induction of the unfolded protein response (UPR), which, depending on the stress level, restores normal cell function or initiates apoptotic cell death. Here the role of ER stress in knee osteoarthritis (OA) was evaluated. It was first tested in vitro and in vivo whether a knockout (KO) of the protein disulfide isomerase ERp57 in chondrocytes induces sufficient ER stress for such analyses. ER stress in ERp57 KO chondrocytes was confirmed by immunofluorescence, immunohistochemistry, and transmission electron microscopy. Knee joints of wildtype (WT) and cartilage-specific ERp57 KO mice (ERp57 cKO) were analyzed by indentation-type atomic force microscopy (IT-AFM), toluidine blue, and immunofluorescence/-histochemical staining. Apoptotic cell death was investigated by a TUNEL assay. Additionally, OA was induced via forced exercise on a treadmill. ER stress in chondrocytes resulted in a reduced compressive stiffness of knee cartilage. With ER stress, 18-month-old mice developed osteoarthritic cartilage degeneration with osteophyte formation in knee joints. These degenerative changes were preceded by apoptotic death in articular chondrocytes. Young mice were not susceptible to OA, even when subjected to forced exercise. This study demonstrates that ER stress induces the development of age-related knee osteoarthritis owing to a decreased protective function of the UPR in chondrocytes with increasing age, while apoptosis increases. Therefore, inhibition of ER stress appears to be an attractive therapeutic target for OA.
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Affiliation(s)
- Yvonne Rellmann
- Institute of Physiological Chemistry and Pathobiochemistry, Waldeyerstraße 15, 48149 Muenster, Germany; (Y.R.); (E.E.)
| | - Elco Eidhof
- Institute of Physiological Chemistry and Pathobiochemistry, Waldeyerstraße 15, 48149 Muenster, Germany; (Y.R.); (E.E.)
| | - Uwe Hansen
- Institute of Musculoskeletal Medicine, University Hospital Münster, Albert-Schweitzer-Campus 1, Building D3, 48149 Muenster, Germany;
| | - Lutz Fleischhauer
- Center for Applied Tissue Engineering and Regenerative Medicine-CANTER, Munich University of Applied Sciences, 80335 Munich, Germany; (L.F.); (J.V.); (H.C.-S.)
- Center for Nanoscience-CeNS, 80335 Munich, Germany
- Department for Orthopaedics and Trauma Surgery, Musculoskeletal University Center Munich (MUM), University Hospital, LMU Munich, 80335 Munich, Germany;
| | - Jonas Vogel
- Center for Applied Tissue Engineering and Regenerative Medicine-CANTER, Munich University of Applied Sciences, 80335 Munich, Germany; (L.F.); (J.V.); (H.C.-S.)
- Center for Nanoscience-CeNS, 80335 Munich, Germany
| | - Hauke Clausen-Schaumann
- Center for Applied Tissue Engineering and Regenerative Medicine-CANTER, Munich University of Applied Sciences, 80335 Munich, Germany; (L.F.); (J.V.); (H.C.-S.)
- Center for Nanoscience-CeNS, 80335 Munich, Germany
| | - Attila Aszodi
- Department for Orthopaedics and Trauma Surgery, Musculoskeletal University Center Munich (MUM), University Hospital, LMU Munich, 80335 Munich, Germany;
| | - Rita Dreier
- Institute of Physiological Chemistry and Pathobiochemistry, Waldeyerstraße 15, 48149 Muenster, Germany; (Y.R.); (E.E.)
- Correspondence: ; Tel.: +49-251-8355573
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12
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Duangchan T, Tawonsawatruk T, Angsanuntsukh C, Trachoo O, Hongeng S, Kitiyanant N, Supokawej A. Amelioration of osteogenesis in iPSC-derived mesenchymal stem cells from osteogenesis imperfecta patients by endoplasmic reticulum stress inhibitor. Life Sci 2021; 278:119628. [PMID: 34015290 DOI: 10.1016/j.lfs.2021.119628] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Revised: 05/04/2021] [Accepted: 05/12/2021] [Indexed: 12/20/2022]
Abstract
AIM Osteogenesis imperfecta (OI) is a hereditary connective tissue disorder primarily caused by mutations in COL1A1 or COL1A2, which encode type I collagen. These mutations affect the quantity and/or quality of collagen composition in bones, leading to bone fragility. Currently, there is still a lack of treatment that addresses disease-causing factors due to an insufficient understanding of the pathological mechanisms involved. MAIN METHODS Induced pluripotent stem cells (iPSCs) were generated from OI patients with glycine substitution mutations in COL1A1 and COL1A2 and developed into mesenchymal stem cells (iPS-MSCs). OI-derived iPS-MSCs underwent in vitro osteogenic induction to study cell growth, osteogenic differentiation capacity, mRNA expression of osteogenic and unfolded protein response (UPR) markers and apoptosis. The effects of 4-phenylbutyric acid (4-PBA) were examined after treatment of OI iPS-MSCs during osteogenesis. KEY FINDINGS OI-derived iPS-MSCs exhibited decreased cell growth and impaired osteogenic differentiation and collagen expression. Expression of UPR genes was increased, which led to an increase in apoptotic cell death. 4-PBA treatment decreased apoptotic cells and reduced expression of UPR genes, including HSPA5, XBP1, ATF4, DDIT3, and ATF6. Osteogenic phenotypes, including RUNX2, SPP1, BGLAP, and IBPS expression, as well as calcium mineralization, were also improved. SIGNIFICANCE MSCs differentiated from disease-specific iPSCs have utility as a disease model for identifying disease-specific treatments. In addition, the ER stress-associated UPR could be a pathogenic mechanism associated with OI. Treatment with 4-PBA alleviated OI pathogenesis by attenuating UPR markers and apoptotic cell death.
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Affiliation(s)
- Thitinat Duangchan
- Department of Clinical Microscopy, Faculty of Medical Technology, Mahidol University, Phutthamonthon, Nakhon Pathom 73170, Thailand
| | - Tulyapruek Tawonsawatruk
- Department of Orthopedics, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok 10400, Thailand
| | - Chanika Angsanuntsukh
- Department of Orthopedics, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok 10400, Thailand
| | - Objoon Trachoo
- Department of Medicine, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok 10400, Thailand
| | - Suradej Hongeng
- Department of Pediatrics, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok 10400, Thailand
| | - Narisorn Kitiyanant
- Stem Cell Research Group, Institute of Molecular Biosciences, Mahidol University, Phutthamonthon, Nakhon Pathom 73170, Thailand
| | - Aungkura Supokawej
- Department of Clinical Microscopy, Faculty of Medical Technology, Mahidol University, Phutthamonthon, Nakhon Pathom 73170, Thailand.
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13
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Assis IO, Lacerda RHW, Cavalcante BGN, Bezamat M, Modesto A, Vieira AR. IRE1 Less Common Homozygous Genotype in Families With Positive History of Cancer and Individuals Born With Cleft Lip/Palate. J Craniofac Surg 2020; 32:e407-e411. [PMID: 33177419 DOI: 10.1097/scs.0000000000007169] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
ABSTRACT The aim of this study was to test if the marker rs196929 in IRE1 associated with cleft lip and palate depending on the family history for cancer. A consecutive sample of 836 individuals were recruited between April and October of 2019 (303 born with cleft lip and palate, 256 relatives mostly of the maternal side of individuals born with cleft lip and palate, and 277 unaffected unrelated individuals). Parents or guardians of the children answered a questionnaire with basic demographic information about their children and their family history of cleft lip and palate and cancer. DNA was obtained from whole saliva and IRE1 rs196929 was genotyped using TaqMan chemistry and end-point analysis. Over-representation of alleles was determined using chi-square as implemented in PLINK using an alpha of 0.05. There was an excess of less common homozygotes of IRE1 rs196929 among relatives of individuals born with cleft lip and palate when they had positive family history of cancer in comparison with individuals born with cleft lip and palate or with unrelated unaffected individuals (P = 0.0006 and P < 0.001, respectively). This pattern was similar when families reported one type of cancer or multiple ones, or when cancer affecting females (breast or reproductive tract) or the structures of the gastro-intestinal tract were considered. These results provide support for a role of the ER stress IRE1-XPB1 pathway in the higher frequency of cancer in families of individuals born with cleft lip and palate.
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Affiliation(s)
- Ionária O Assis
- Graduate Program of Dentistry, Universidade Federal da Paraíba, João Pessoa
| | - Rosa Helena W Lacerda
- Graduate Program of Dentistry, Universidade Federal da Paraíba, João Pessoa.,Cleft Lip and palate center, Lauro Wanderley University Hospital, Universidade Federal da Paraiba, João Pessoa, Brasil
| | | | | | - Adriana Modesto
- Department of Pediatric Dentistry, School of Dental Medicine, University of Pittsburgh, Pittsburgh, PA
| | - Alexandre R Vieira
- Graduate Program of Dentistry, Universidade Federal da Paraíba, João Pessoa.,Department of Oral Biology
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14
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Wang FS, Kuo CW, Ko JY, Chen YS, Wang SY, Ke HJ, Kuo PC, Lee CH, Wu JC, Lu WB, Tai MH, Jahr H, Lian WS. Irisin Mitigates Oxidative Stress, Chondrocyte Dysfunction and Osteoarthritis Development through Regulating Mitochondrial Integrity and Autophagy. Antioxidants (Basel) 2020; 9:antiox9090810. [PMID: 32882839 PMCID: PMC7555738 DOI: 10.3390/antiox9090810] [Citation(s) in RCA: 83] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Revised: 08/21/2020] [Accepted: 08/25/2020] [Indexed: 12/17/2022] Open
Abstract
Compromised autophagy and mitochondrial dysfunction downregulate chondrocytic activity, accelerating the development of osteoarthritis (OA). Irisin, a cleaved form of fibronectin type III domain containing 5 (FNDC5), regulates bone turnover and muscle homeostasis. Little is known about the effect of Irisin on chondrocytes and the development of osteoarthritis. This study revealed that human osteoarthritic articular chondrocytes express decreased level of FNDC5 and autophagosome marker LC3-II but upregulated levels of oxidative DNA damage marker 8-hydroxydeoxyguanosine (8-OHdG) and apoptosis. Intra-articular administration of Irisin further alleviated symptoms of medial meniscus destabilization, like cartilage erosion and synovitis, while improved the gait profiles of the injured legs. Irisin treatment upregulated autophagy, 8-OHdG and apoptosis in chondrocytes of the injured cartilage. In vitro, Irisin improved IL-1β-mediated growth inhibition, loss of specific cartilage markers and glycosaminoglycan production by chondrocytes. Irisin also reversed Sirt3 and UCP-1 pathways, thereby improving mitochondrial membrane potential, ATP production, and catalase to attenuated IL-1β-mediated reactive oxygen radical production, mitochondrial fusion, mitophagy, and autophagosome formation. Taken together, FNDC5 loss in chondrocytes is correlated with human knee OA. Irisin repressed inflammation-mediated oxidative stress and extracellular matrix underproduction through retaining mitochondrial biogenesis, dynamics and autophagic program. Our analyses shed new light on the chondroprotective actions of this myokine, and highlight the remedial effects of Irisin on OA development.
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Affiliation(s)
- Feng-Sheng Wang
- Core Laboratory for Phenomics and Diagnostics, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung 83301, Taiwan; (F.-S.W.); (C.-W.K.); (Y.-S.C.); (S.-Y.W.); (H.-J.K.); (P.-C.K.); (C.-H.L.)
- Department of Medical Research, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung 83301, Taiwan
- Center for Mitochondrial Research and Medicine, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung 83301, Taiwan
- Graduate Institute of Clinical Medical Science, Chang Gung University College of Medicine, Kaohsiung 83301, Taiwan
| | - Chung-Wen Kuo
- Core Laboratory for Phenomics and Diagnostics, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung 83301, Taiwan; (F.-S.W.); (C.-W.K.); (Y.-S.C.); (S.-Y.W.); (H.-J.K.); (P.-C.K.); (C.-H.L.)
- Department of Medical Research, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung 83301, Taiwan
| | - Jih-Yang Ko
- Department of Orthopedic Surgery, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung 83301, Taiwan;
| | - Yu-Shan Chen
- Core Laboratory for Phenomics and Diagnostics, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung 83301, Taiwan; (F.-S.W.); (C.-W.K.); (Y.-S.C.); (S.-Y.W.); (H.-J.K.); (P.-C.K.); (C.-H.L.)
- Department of Medical Research, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung 83301, Taiwan
| | - Shao-Yu Wang
- Core Laboratory for Phenomics and Diagnostics, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung 83301, Taiwan; (F.-S.W.); (C.-W.K.); (Y.-S.C.); (S.-Y.W.); (H.-J.K.); (P.-C.K.); (C.-H.L.)
- Department of Medical Research, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung 83301, Taiwan
| | - Huei-Jing Ke
- Core Laboratory for Phenomics and Diagnostics, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung 83301, Taiwan; (F.-S.W.); (C.-W.K.); (Y.-S.C.); (S.-Y.W.); (H.-J.K.); (P.-C.K.); (C.-H.L.)
- Department of Medical Research, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung 83301, Taiwan
| | - Pei-Chen Kuo
- Core Laboratory for Phenomics and Diagnostics, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung 83301, Taiwan; (F.-S.W.); (C.-W.K.); (Y.-S.C.); (S.-Y.W.); (H.-J.K.); (P.-C.K.); (C.-H.L.)
- Department of Medical Research, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung 83301, Taiwan
| | - Chin-Huei Lee
- Core Laboratory for Phenomics and Diagnostics, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung 83301, Taiwan; (F.-S.W.); (C.-W.K.); (Y.-S.C.); (S.-Y.W.); (H.-J.K.); (P.-C.K.); (C.-H.L.)
- Department of Medical Research, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung 83301, Taiwan
| | - Jian-Ching Wu
- Biobank and Tissue Bank, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung 83301, Taiwan;
| | - Wen-Bin Lu
- Institute of Biomedical Sciences, National Sun Yat-Sun University, Kaohsiung 804, Taiwan; (W.-B.L.); (M.-H.T.)
| | - Ming-Hong Tai
- Institute of Biomedical Sciences, National Sun Yat-Sun University, Kaohsiung 804, Taiwan; (W.-B.L.); (M.-H.T.)
| | - Holger Jahr
- Department of Anatomy and Cell Biology, University Hospital RWTH Aachen, 52074 Aachen, Germany
- Department of Orthopedic Surgery, Maastricht University Medical Center, 6229 ER Maastricht, The Netherlands
- Correspondence: (H.J.); (W.-S.L.); Tel.: +886-7-731-7123 (W.-S.L.)
| | - Wei-Shiung Lian
- Core Laboratory for Phenomics and Diagnostics, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung 83301, Taiwan; (F.-S.W.); (C.-W.K.); (Y.-S.C.); (S.-Y.W.); (H.-J.K.); (P.-C.K.); (C.-H.L.)
- Department of Medical Research, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung 83301, Taiwan
- Center for Mitochondrial Research and Medicine, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung 83301, Taiwan
- Correspondence: (H.J.); (W.-S.L.); Tel.: +886-7-731-7123 (W.-S.L.)
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15
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Impaired chondrocyte U3 snoRNA expression in osteoarthritis impacts the chondrocyte protein translation apparatus. Sci Rep 2020; 10:13426. [PMID: 32778764 PMCID: PMC7417995 DOI: 10.1038/s41598-020-70453-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2020] [Accepted: 07/23/2020] [Indexed: 12/18/2022] Open
Abstract
Although pathways controlling ribosome activity have been described to regulate chondrocyte homeostasis in osteoarthritis, ribosome biogenesis in osteoarthritis is unexplored. We hypothesized that U3 snoRNA, a non-coding RNA involved in ribosomal RNA maturation, is critical for chondrocyte protein translation capacity in osteoarthritis. U3 snoRNA was one of a number of snoRNAs with decreased expression in osteoarthritic cartilage and osteoarthritic chondrocytes. OA synovial fluid impacted U3 snoRNA expression by affecting U3 snoRNA gene promoter activity, while BMP7 was able to increase its expression. Altering U3 snoRNA expression resulted in changes in chondrocyte phenotype. Interference with U3 snoRNA expression led to reduction of rRNA levels and translational capacity, whilst induced expression of U3 snoRNA was accompanied by increased 18S and 28S rRNA levels and elevated protein translation. Whole proteome analysis revealed a global impact of reduced U3 snoRNA expression on protein translational processes and inflammatory pathways. For the first time we demonstrate implications of a snoRNA in osteoarthritis chondrocyte biology and investigated its role in the chondrocyte differentiation status, rRNA levels and protein translational capacity.
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16
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Wang YZ, Li QX, Zhang DM, Chen LB, Wang H. Ryanodine receptor 1 mediated dexamethasone-induced chondrodysplasia in fetal rats. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2020; 1867:118791. [PMID: 32619649 DOI: 10.1016/j.bbamcr.2020.118791] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Revised: 06/22/2020] [Accepted: 06/26/2020] [Indexed: 11/28/2022]
Abstract
BACKGROUND Osteoarthritis is caused by cartilage dysplasia and has fetal origin. Prenatal dexamethasone exposure (PDE) induced chondrodysplasia in fetal rats by inhibiting transforming growth factor β (TGFβ) signaling. This study aimed to determine the effect of dexamethasone on fetal cartilage development and illustrate the underlying molecular mechanism. METHODS Dexamethasone (0.2 mg/kg.d) was injected subcutaneously every morning in pregnant rats from gestational day (GD) 9 to GD21. Harvested fetal femurs and tibias at GD21 for immunofluorescence and gene expression analysis. Fetal chondrocytes were treated with dexamethasone (100, 250 and 500 nM), endoplasmic reticulum stress (ERS) inhibitor, and ryanodine receptor 1 (RYR1) antagonist for subsequent analyses. RESULTS In vivo, prenatal dexamethasone exposure (PDE) decreased the total length of the fetal cartilage, the proportion of the proliferation area and the cell density and matrix content in fetal articular cartilage. Moreover, PDE increased RYR1 expression and intracellular calcium levels and elevated the expression of ERS-related genes, while downregulated the TGFβ signaling pathway and extracellular matrix (ECM) synthesis in fetal chondrocytes. In vitro, we verified dexamethasone significantly decreased ECM synthesis through activating RYR 1 mediated-ERS. CONCLUSIONS PDE inhibited TGFβ signaling pathway and matrix synthesis through RYR1 / intracellular calcium mediated ERS, which ultimately led to fetal dysplasia. This study confirmed the molecular mechanism of ERS involved in the developmental toxicity of dexamethasone and suggested that RYR1 may be an early intervention target for fetal-derived adult osteoarthritis.
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Affiliation(s)
- Yi-Zhong Wang
- Department of Orthopedic Surgery, Zhongnan Hospital of Wuhan University, Wuhan 430071, China; Xiangyang No.1 People' Hospital, Hubei University of Medicine, Xiangyang 441000, China
| | - Qing-Xian Li
- Department of Orthopedic Surgery, Zhongnan Hospital of Wuhan University, Wuhan 430071, China
| | - Ding-Mei Zhang
- Department of Pharmacology, Basic Medical School of Wuhan University, Wuhan 430071, China
| | - Liao-Bin Chen
- Department of Orthopedic Surgery, Zhongnan Hospital of Wuhan University, Wuhan 430071, China; Hubei Provincial Key Laboratory of Developmentally Originated Disease, Wuhan, 430071, China.
| | - Hui Wang
- Department of Pharmacology, Basic Medical School of Wuhan University, Wuhan 430071, China; Hubei Provincial Key Laboratory of Developmentally Originated Disease, Wuhan, 430071, China.
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17
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K + and Ca 2+ Channels Regulate Ca 2+ Signaling in Chondrocytes: An Illustrated Review. Cells 2020; 9:cells9071577. [PMID: 32610485 PMCID: PMC7408816 DOI: 10.3390/cells9071577] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Revised: 06/23/2020] [Accepted: 06/25/2020] [Indexed: 12/16/2022] Open
Abstract
An improved understanding of fundamental physiological principles and progressive pathophysiological processes in human articular joints (e.g., shoulders, knees, elbows) requires detailed investigations of two principal cell types: synovial fibroblasts and chondrocytes. Our studies, done in the past 8–10 years, have used electrophysiological, Ca2+ imaging, single molecule monitoring, immunocytochemical, and molecular methods to investigate regulation of the resting membrane potential (ER) and intracellular Ca2+ levels in human chondrocytes maintained in 2-D culture. Insights from these published papers are as follows: (1) Chondrocyte preparations express a number of different ion channels that can regulate their ER. (2) Understanding the basis for ER requires knowledge of (a) the presence or absence of ligand (ATP/histamine) stimulation and (b) the extraordinary ionic composition and ionic strength of synovial fluid. (3) In our chondrocyte preparations, at least two types of Ca2+-activated K+ channels are expressed and can significantly hyperpolarize ER. (4) Accounting for changes in ER can provide insights into the functional roles of the ligand-dependent Ca2+ influx through store-operated Ca2+ channels. Some of the findings are illustrated in this review. Our summary diagram suggests that, in chondrocytes, the K+ and Ca2+ channels are linked in a positive feedback loop that can augment Ca2+ influx and therefore regulate lubricant and cytokine secretion and gene transcription.
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18
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Abstract
Cartilage comprises a single cell type, the chondrocyte, embedded in a highly complex extracellular matrix. Disruption to the cartilage growth plate leads to reduced bone growth and results in a clinically diverse group of conditions known as genetic skeletal diseases (GSDs). Similarly, long-term degradation of articular cartilage can lead to osteoarthritis (OA), a disease characterised by joint pain and stiffness. As professionally secreting cells, chondrocytes are particularly susceptible to endoplasmic reticulum (ER) stress and this has been identified as a core disease mechanism in a group of clinically and pathologically related GSDs. If unresolved, ER stress can lead to chondrocyte cell death. Recent interest has focused on ER stress as a druggable target for GSDs and this has led to the first clinical trial for a GSD by repurposing an antiepileptic drug. Interestingly, ER stress markers have also been associated with OA in multiple cell and animal models and there is increasing interest in it as a possible therapeutic target for treatment. In summary, chondrocyte ER stress has been identified as a core disease mechanism in GSDs and as a contributory factor in OA. Thus, chondrocyte ER stress is a unifying factor for both common and rare cartilage-related diseases and holds promise as a novel therapeutic target.
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Affiliation(s)
- Michael D Briggs
- Biosciences Institute, Faculty of Medical Sciences, Newcastle University, International Centre for Life, Central Parkway, Newcastle upon Tyne, NE1 3BZ, UK
| | - Ella P Dennis
- Biosciences Institute, Faculty of Medical Sciences, Newcastle University, International Centre for Life, Central Parkway, Newcastle upon Tyne, NE1 3BZ, UK
| | - Helen F Dietmar
- Biosciences Institute, Faculty of Medical Sciences, Newcastle University, International Centre for Life, Central Parkway, Newcastle upon Tyne, NE1 3BZ, UK
| | - Katarzyna A Pirog
- Biosciences Institute, Faculty of Medical Sciences, Newcastle University, International Centre for Life, Central Parkway, Newcastle upon Tyne, NE1 3BZ, UK
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