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Stiffel VM, Thomas A, Rundle CH, Sheng MHC, Lau KHW. The EphA4 Signaling is Anti-catabolic in Synoviocytes but Pro-anabolic in Articular Chondrocytes. Calcif Tissue Int 2020; 107:576-592. [PMID: 32816052 PMCID: PMC7606366 DOI: 10.1007/s00223-020-00747-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Accepted: 08/06/2020] [Indexed: 12/31/2022]
Abstract
The expression and activation of EphA4 in the various cell types in a knee joint was upregulated upon an intraarticular injury. To determine if EphA4 signaling plays a role in osteoarthritis, we determined whether deficient EphA4 expression (in EphA4 knockout mice) or upregulation of the EphA4 signaling (with the EfnA4-fc treatment) would alter cellular functions of synoviocytes and articular chondrocytes. In synoviocytes, deficient EphA4 expression enhanced, whereas activation of the EphA4 signaling reduced, expression and secretion of key inflammatory cytokines and matrix metalloproteases. Conversely, in articular chondrocytes, activation of the EphA4 signaling upregulated, while deficient EphA4 expression reduced, expression levels of chondrogenic genes (e.g., aggrecan, lubricin, type-2 collagen, and Sox9). EfnA4-fc treatment in wildtype, but not EphA4-deficient, articular chondrocytes promoted the formation and activity of acidic proteoglycan-producing colonies. Activation of the EphA4 signaling in articular chondrocytes upregulated Rac1/2 and downregulated RhoA via enhancing Vav1 and reducing Ephexin1 activation, respectively. However, activation of the EphA4 signaling in synoviocytes suppressed the Vav/Rac signaling while upregulated the Ephexin/Rho signaling. In summary, the EphA4 signaling in synoviocytes is largely of anti-catabolic nature through suppression of the expression of inflammatory cytokines and matrix proteases, but in articular chondrocytes the signaling is pro-anabolic in that it promotes the biosynthesis of articular cartilage. The contrasting action of the EphA4 signaling in synoviocytes as opposing to articular chondrocytes may in part be mediated through the opposite differential effects of the EphA4 signaling on the Vav/Rac signaling and Ephexin/Rho signaling in the two skeletal cell types.
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Affiliation(s)
- Virginia M Stiffel
- Musculoskeletal Disease Center (151), Jerry L. Pettis Memorial V.A. Medical Center, 11201 Benton Street, Loma Linda, CA, 92357, USA
| | - Alexander Thomas
- Musculoskeletal Disease Center (151), Jerry L. Pettis Memorial V.A. Medical Center, 11201 Benton Street, Loma Linda, CA, 92357, USA
- Department of Medicine, Loma Linda University School of Medicine, Loma Linda, CA, 92354, USA
| | - Charles H Rundle
- Musculoskeletal Disease Center (151), Jerry L. Pettis Memorial V.A. Medical Center, 11201 Benton Street, Loma Linda, CA, 92357, USA
- Department of Medicine, Loma Linda University School of Medicine, Loma Linda, CA, 92354, USA
| | - Matilda H-C Sheng
- Musculoskeletal Disease Center (151), Jerry L. Pettis Memorial V.A. Medical Center, 11201 Benton Street, Loma Linda, CA, 92357, USA
- Department of Medicine, Loma Linda University School of Medicine, Loma Linda, CA, 92354, USA
| | - Kin-Hing William Lau
- Musculoskeletal Disease Center (151), Jerry L. Pettis Memorial V.A. Medical Center, 11201 Benton Street, Loma Linda, CA, 92357, USA.
- Department of Medicine, Loma Linda University School of Medicine, Loma Linda, CA, 92354, USA.
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2
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Gu R, Shi Y, Huang W, Lao C, Zou Z, Pan S, Huang Z. Theobromine mitigates IL-1β-induced oxidative stress, inflammatory response, and degradation of type II collagen in human chondrocytes. Int Immunopharmacol 2020; 82:106226. [PMID: 32146317 DOI: 10.1016/j.intimp.2020.106226] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2019] [Revised: 01/16/2020] [Accepted: 01/16/2020] [Indexed: 02/08/2023]
Abstract
Osteoarthritis is one of the major causes of disability in elderly adults. Chondrocytes are responsible for the formation and remodeling of articular cartilage in joint tissue. The dysfunction of chondrocytes is a significant factor in the development of osteoarthritis. In the current study, we found that theobromine, a constituent of the cacao plant, possesses a preventive effect against interleukin (IL)-1β-induced chondrocyte dysfunction. Theobromine ameliorates IL-1β-induced production of cellular reactive oxygen species (ROS) and inflammatory mediators including cyclooxygenase-2 (COX-2) and prostaglandin E2 (PGE2). The presence of theobromine suppresses IL-1β-induced inducible nitro oxide synthase (iNOS) expression and cellular nitro oxide (NO) production. Theobromine also suppresses IL-1β-induced production of the pro-inflammatory cytokines tumor necrosis factor-α (TNF-α) and monocyte chemoattractant protein-1 (MCP-1), as well as matrix metalloproteinases (MMP)-3 and MMP-13. Additionally, theobromine mitigates IL-1β-induced type II collagen degradation. Mechanistically, we show that theobromine inhibits IL-1β-induced IκBα activation, nuclear factor-κB (NF-κB) protein p65 accumulation, and transfected NF-κB promoter activity, indicating that theobromine suppresses the NF-κB pathway in chondrocytes. Collectively, our study demonstrates that the natural molecule theobromine has a protective effect to counter cytokine-induced chondrocyte dysfunction, implying its beneficial effect in the prevention of osteoarthritis.
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Affiliation(s)
- Ronghe Gu
- Department of Orthopedics, The First People's Hospital of Nanning, The Fifth Affiliated Hospital of Guangxi Medical University, China
| | - Yu Shi
- Department of Spinal Surgery, Affiliated Hospital of Youjiang Medical College for Nationalities, China
| | - Weiguo Huang
- Department of Orthopedics, The First People's Hospital of Nanning, The Fifth Affiliated Hospital of Guangxi Medical University, China
| | - Chendeng Lao
- Department of Orthopedics, The First People's Hospital of Nanning, The Fifth Affiliated Hospital of Guangxi Medical University, China
| | - Zhuan Zou
- Department of Orthopedics, The First People's Hospital of Nanning, The Fifth Affiliated Hospital of Guangxi Medical University, China
| | - Songmu Pan
- Department of Orthopedics, The First People's Hospital of Nanning, The Fifth Affiliated Hospital of Guangxi Medical University, China
| | - Zonggui Huang
- Department of Orthopedics, The First People's Hospital of Nanning, The Fifth Affiliated Hospital of Guangxi Medical University, China.
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3
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Bai Y, Gong X, Dou C, Cao Z, Dong S. Redox control of chondrocyte differentiation and chondrogenesis. Free Radic Biol Med 2019; 132:83-89. [PMID: 30394290 DOI: 10.1016/j.freeradbiomed.2018.10.443] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2018] [Revised: 10/14/2018] [Accepted: 10/26/2018] [Indexed: 11/24/2022]
Abstract
Chondrogenesis involves the recruitment and migration of mesenchymal cells, mesenchymal condensation, and chondrocyte differentiation and hypertrophy. Multiple factors precisely regulate chondrogenesis. Recent studies have demonstrated that the redox status of chondrocytes plays an essential role in the regulation of chondrocyte differentiation and chondrogenesis. Reactive oxygen species (ROS) and reactive nitrogen species (RNS) are important factors that change the intracellular redox status. Physiological levels of ROS/RNS act as intracellular signals in chondrocytes, and oxidative stress impairs the metabolism of chondrocytes. Under physiological conditions, the balance between ROS/RNS production and elimination ensures that redox-sensitive signalling proteins function correctly. The redox homeostasis of chondrocytes ensures that they respond appropriately to endogenous and exogenous stimuli. This review focuses on the redox regulation of key signalling pathways and transcription factors that control chondrogenesis and chondrocyte differentiation. Additionally, the mechanism by which ROS/RNS regulate signalling proteins and transcription factors in chondrocytes is also reviewed.
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Affiliation(s)
- Yun Bai
- Department of Biomedical Materials Science, School of Biomedical Engineering, Third Military Medical University, Gaotanyan Street No.30, Chongqing 400038, China
| | - Xiaoshan Gong
- Department of Biomedical Materials Science, School of Biomedical Engineering, Third Military Medical University, Gaotanyan Street No.30, Chongqing 400038, China
| | - Ce Dou
- Department of Biomedical Materials Science, School of Biomedical Engineering, Third Military Medical University, Gaotanyan Street No.30, Chongqing 400038, China
| | - Zhen Cao
- Department of Biomedical Materials Science, School of Biomedical Engineering, Third Military Medical University, Gaotanyan Street No.30, Chongqing 400038, China
| | - Shiwu Dong
- Department of Biomedical Materials Science, School of Biomedical Engineering, Third Military Medical University, Gaotanyan Street No.30, Chongqing 400038, China; State Key Laboratory of Trauma, Burns and Combined Injury, Third Military Medical University, Chongqing 400038, China.
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4
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Abstract
During cartilage development chondrocytes undergo a multi-step process characterized by consecutive changes in cell morphology and gene expression. Cell proliferation, polarity, differentiation, and migration are influenced by chemical and mechanical signaling between the extracellular matrix (ECM) and the cell. Several structurally diverse transmembrane receptors such as integrins, discoidin domain receptor 2 (DDR 2), and CD44 mediate the crosstalk between cells and their ECM. However, the contribution of cell-matrix interactions during early chondrogenesis and further cartilage development through cell receptors and their signal transduction pathways is still not fully understood. Determination of receptor signaling pathways and the function of downstream targets will aid in a better understanding of musculoskeletal pathologies such as chondrodysplasia, and the development of new approaches for the treatment of cartilage disorders. We will summarize recent findings, linking cell receptors and their potential signaling pathways to the control of chondrocyte behavior during early chondrogenesis and endochondral ossification.
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Affiliation(s)
- Carina Prein
- Department of Physiology and Pharmacology, Schulich School of Medicine and Dentistry, and Western University Bone and Joint Institute, University of Western Ontario, London, ON, Canada
| | - Frank Beier
- Department of Physiology and Pharmacology, Schulich School of Medicine and Dentistry, and Western University Bone and Joint Institute, University of Western Ontario, London, ON, Canada.
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5
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Yao B, Zhang M, Liu M, Liu Y, Hu Y, Zhao Y. Transcriptomic characterization elucidates a signaling network that controls antler growth. Genome 2018; 61:829-841. [DOI: 10.1139/gen-2017-0241] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Deer antlers are amazing appendages with the fastest growth rate among mammalian organs. Antler growth is driven by the growth center through a modified endochondral ossification process. Thus, identification of signaling pathways functioning in antler growth center would help us to uncover the underlying molecular mechanism of rapid antler growth. Furthermore, exploring and dissecting the molecular mechanism that regulates antler growth is extremely important and helpful for identifying methods to enhance long bone growth and treat cartilage- and bone-related diseases. In this study, we build a comprehensive intercellular signaling network in antler growth centers from both the slow growth stage and rapid growth stage using a state-of-art RNA-Seq approach. This network includes differentially expressed genes that regulate the activation of multiple signaling pathways, including the regulation of actin cytoskeleton, calcium signaling, and adherens junction. These signaling pathways coordinately control multiple biological processes, including chondrocyte proliferation and differentiation, matrix homeostasis, mechanobiology, and aging processes, during antler growth in a comprehensive and efficient manner. Therefore, our study provides novel insights into the molecular mechanisms regulating antler growth and provides valuable and powerful insight for medical research on therapeutic strategies targeting skeletal disorders and related cartilage and bone diseases.
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Affiliation(s)
- Baojin Yao
- Chinese Medicine and Bioengineering Research and Development Center, Changchun University of Chinese Medicine, Changchun 130117, China
| | - Mei Zhang
- Innovation Practice Center, Changchun University of Chinese Medicine, Changchun 130117, China
| | - Meixin Liu
- Chinese Medicine and Bioengineering Research and Development Center, Changchun University of Chinese Medicine, Changchun 130117, China
| | - Yuxin Liu
- Chinese Medicine and Bioengineering Research and Development Center, Changchun University of Chinese Medicine, Changchun 130117, China
| | - Yaozhong Hu
- Chinese Medicine and Bioengineering Research and Development Center, Changchun University of Chinese Medicine, Changchun 130117, China
| | - Yu Zhao
- Chinese Medicine and Bioengineering Research and Development Center, Changchun University of Chinese Medicine, Changchun 130117, China
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Suzuki D, Bush JR, Bryce DM, Kamijo R, Beier F. Rac1 Dosage Is Crucial for Normal Endochondral Bone Growth. Endocrinology 2017; 158:3386-3398. [PMID: 28977598 DOI: 10.1210/en.2016-1691] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/21/2016] [Accepted: 07/14/2017] [Indexed: 01/28/2023]
Abstract
Rac1, a member of the small Rho GTPase family, plays multiple cellular roles. Studies of mice conditionally lacking Rac1 have revealed essential roles for Rac1 in various tissues, including cartilage and limb mesenchyme, where Rac1 loss produces dwarfism and long bone shortening. To gain further insight into the role of Rac1 in skeletal development, we have used transgenic mouse lines to express a constitutively active (ca) Rac1 mutant protein in a Cre recombinase-dependent manner. Overexpression of caRac1 in limb bud mesenchyme or chondrocytes leads to reduced body weight and shorter bones compared with control mice. Histological analysis of growth plates showed that caRac1;Col2-Cre mice displayed ectopic hypertrophic chondrocytes in the proliferative zone and enlarged hypertrophic zones. These mice also displayed a reduced proportion of proliferating cell nuclear antigen-positive cells in the proliferative zone and nuclear β-catenin localization in the ectopic hypertrophic chondrocytes. Importantly, overexpression of caRac1 partially rescued the phenotypes of Rac1fl/fl;Col2-Cre and Rac1fl/fl;Prx1-Cre conditional knockout mice, including body weight, bone length, and growth plate disorganization. These results suggest that tight regulation of Rac1 activity is necessary for normal cartilage development.
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Affiliation(s)
- Dai Suzuki
- Department of Physiology and Pharmacology, Schulich School of Medicine and Dentistry, The University of Western Ontario, London, Ontario N6A 5C1, Canada
- Department of Biochemistry, School of Dentistry, Showa University, Shinagawa, Tokyo 142-8555, Japan
| | - Jason R Bush
- Department of Physiology and Pharmacology, Schulich School of Medicine and Dentistry, The University of Western Ontario, London, Ontario N6A 5C1, Canada
| | - Dawn-Marie Bryce
- Department of Physiology and Pharmacology, Schulich School of Medicine and Dentistry, The University of Western Ontario, London, Ontario N6A 5C1, Canada
| | - Ryutaro Kamijo
- Department of Biochemistry, School of Dentistry, Showa University, Shinagawa, Tokyo 142-8555, Japan
| | - Frank Beier
- Department of Physiology and Pharmacology, Schulich School of Medicine and Dentistry, The University of Western Ontario, London, Ontario N6A 5C1, Canada
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Hoshino M, Kaneko K, Miyamoto Y, Yoshimura K, Suzuki D, Akaike T, Sawa T, Ida T, Fujii S, Ihara H, Tanaka J, Tsukuura R, Chikazu D, Mishima K, Baba K, Kamijo R. 8-Nitro-cGMP promotes bone growth through expansion of growth plate cartilage. Free Radic Biol Med 2017; 110:63-71. [PMID: 28559051 DOI: 10.1016/j.freeradbiomed.2017.05.022] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/04/2017] [Revised: 05/06/2017] [Accepted: 05/25/2017] [Indexed: 01/29/2023]
Abstract
In endochondral ossification, growth of bones occurs at their growth plate cartilage. While it is known that nitric oxide (NO) synthases are required for proliferation of chondrocytes in growth plate cartilage and growth of bones, the precise mechanism by which NO facilitates these process has not been clarified yet. C-type natriuretic peptide (CNP) also positively regulate elongation of bones through expansion of the growth plate cartilage. Both NO and CNP are known to use cGMP as the second messenger. Recently, 8-nitro-cGMP was identified as a signaling molecule produced in the presence of NO in various types of cells. Here, we found that 8-nitro-cGMP is produced in proliferating chondrocytes in the growth plates, which was enhanced by CNP, in bones cultured ex vivo. In addition, 8-nitro-cGMP promoted bone growth with expansion of the proliferating zone as well as increase in the number of proliferating cells in the growth plates. 8-Nitro-cGMP also promoted the proliferation of chondrocytes in vitro. On the other hand, 8-bromo-cGMP enhanced the growth of bones with expansion of hypertrophic zone of the growth plates without affecting either the width of proliferating zone or proliferation of chondrocytes. These results indicate that 8-nitro-cGMP formed in growth plate cartilage accelerates chondrocyte proliferation and bone growth as a downstream molecule of NO.
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Affiliation(s)
- Marie Hoshino
- Department of Biochemistry, Showa University School of Dentistry, Tokyo, Japan; Department of Prosthodontics, Showa University School of Dentistry, Tokyo, Japan
| | - Kotaro Kaneko
- Department of Biochemistry, Showa University School of Dentistry, Tokyo, Japan; Department of Oral and Maxillofacial Surgery, Tokyo Medical University, Tokyo, Japan
| | - Yoichi Miyamoto
- Department of Biochemistry, Showa University School of Dentistry, Tokyo, Japan.
| | - Kentaro Yoshimura
- Department of Biochemistry, Showa University School of Dentistry, Tokyo, Japan
| | - Dai Suzuki
- Department of Biochemistry, Showa University School of Dentistry, Tokyo, Japan
| | - Takaaki Akaike
- Department of Environmental Health Sciences and Molecular Toxicology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Tomohiro Sawa
- Department of Microbiology, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
| | - Tomoaki Ida
- Department of Environmental Health Sciences and Molecular Toxicology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Shigemoto Fujii
- Department of Environmental Health Sciences and Molecular Toxicology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Hideshi Ihara
- Department of Biological Science, Graduate School of Science, Osaka Prefecture University, Sakai, Japan
| | - Junichi Tanaka
- Division of Pathology, Department of Oral Diagnostic Sciences, Showa University School of Dentistry, Tokyo, Japan
| | - Risa Tsukuura
- Department of Biochemistry, Showa University School of Dentistry, Tokyo, Japan; Department of Oral and Maxillofacial Surgery, Tokyo Medical University, Tokyo, Japan
| | - Daichi Chikazu
- Department of Oral and Maxillofacial Surgery, Tokyo Medical University, Tokyo, Japan
| | - Kenji Mishima
- Division of Pathology, Department of Oral Diagnostic Sciences, Showa University School of Dentistry, Tokyo, Japan
| | - Kazuyoshi Baba
- Department of Prosthodontics, Showa University School of Dentistry, Tokyo, Japan
| | - Ryutaro Kamijo
- Department of Biochemistry, Showa University School of Dentistry, Tokyo, Japan
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8
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de Andrés MC, Takahashi A, Oreffo ROC. Demethylation of an NF-κB enhancer element orchestrates iNOS induction in osteoarthritis and is associated with altered chondrocyte cell cycle. Osteoarthritis Cartilage 2016; 24:1951-1960. [PMID: 27307355 DOI: 10.1016/j.joca.2016.06.002] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/18/2016] [Revised: 05/18/2016] [Accepted: 06/06/2016] [Indexed: 02/02/2023]
Abstract
OBJECTIVE To examine the methylation profile of the nuclear factor (NF)-κB enhancer region at -5.8 kb of inducible nitric oxide synthase (iNOS) and the subsequent role in the induction of osteoarthritis (OA) via cell cycle regulation. METHODS Percentage methylation was determined by pyrosequencing, gene expression by qRT-PCR and cell proliferation was determined using the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. Transient transfections were induced to determine the effect of the NF-κB enhancer region on cell proliferation and the influence of DNA methylation. RESULTS In vitro de-methylation with 5-aza-dC showed decreased levels of DNA methylation at CpG sites localised at -5.8 kb, which correlated with higher levels of iNOS expression. In vitro methylation of the NF-κB enhancer region at -5.8 kb increased the percentage of cells at G0/G1 cell cycle phase. Loss of methylation within this region correlated with, enhanced proliferation and increased number of cells at G2/M phase. OA chondrocytes demonstrated up-regulation of the G0/G1 cell cycle progression markers Cyclin D1 and CDK6 in contrast to control cells. We demonstrate the loss of methylation that occurs at specific CpG sites localised at the -5.8 kb NF-κB enhancer region of the iNOS gene in OA chondrocytes permits the binding of this transcription factor activating the expression of iNOS. This results in subsequent altered cell cycle regulation, altered proliferative phenotype and transmission of the pathogenic phenotype to daughter cells. CONCLUSIONS This study indicates that inhibition of cell cycle progression by iNOS enhancer hypermethylation is capable of reducing pro-inflammatory responses via down-regulation of NF-κB with important therapeutic implications in OA.
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Affiliation(s)
- M C de Andrés
- Bone and Joint Research Group, Centre for Human Development Stem Cells and Regeneration, Institute of Developmental Science, University of Southampton Medical School, Southampton, UK
| | - A Takahashi
- Bone and Joint Research Group, Centre for Human Development Stem Cells and Regeneration, Institute of Developmental Science, University of Southampton Medical School, Southampton, UK; Department of Orthopaedic Surgery, Tohoku University Hospital, Sendai, Japan
| | - R O C Oreffo
- Bone and Joint Research Group, Centre for Human Development Stem Cells and Regeneration, Institute of Developmental Science, University of Southampton Medical School, Southampton, UK.
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Iezaki T, Ozaki K, Fukasawa K, Inoue M, Kitajima S, Muneta T, Takeda S, Fujita H, Onishi Y, Horie T, Yoneda Y, Takarada T, Hinoi E. ATF3 deficiency in chondrocytes alleviates osteoarthritis development. J Pathol 2016; 239:426-37. [DOI: 10.1002/path.4739] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2015] [Revised: 04/16/2016] [Accepted: 04/21/2016] [Indexed: 11/07/2022]
Affiliation(s)
- Takashi Iezaki
- Laboratory of Molecular Pharmacology, Division of Pharmaceutical Sciences; Kanazawa University Graduate School of Medical, Pharmaceutical and Health Sciences; Kanazawa Ishikawa Japan
| | - Kakeru Ozaki
- Laboratory of Molecular Pharmacology, Division of Pharmaceutical Sciences; Kanazawa University Graduate School of Medical, Pharmaceutical and Health Sciences; Kanazawa Ishikawa Japan
| | - Kazuya Fukasawa
- Laboratory of Molecular Pharmacology, Division of Pharmaceutical Sciences; Kanazawa University Graduate School of Medical, Pharmaceutical and Health Sciences; Kanazawa Ishikawa Japan
| | - Makoto Inoue
- Department of Biochemical Genetics; Medical Research Institute, Tokyo Medical and Dental University; Tokyo Japan
| | - Shigetaka Kitajima
- Department of Biochemical Genetics; Medical Research Institute, Tokyo Medical and Dental University; Tokyo Japan
| | - Takeshi Muneta
- Department of Joint Surgery and Sports Medicine; Graduate School of Medicine Tokyo Medical and Dental University; Tokyo Japan
| | - Shu Takeda
- Department of Physiology and Cell Biology; Tokyo Medical and Dental University Graduate School and Faculty of Medicine; Tokyo Japan
| | - Hiroyuki Fujita
- Laboratory of Molecular Pharmacology, Division of Pharmaceutical Sciences; Kanazawa University Graduate School of Medical, Pharmaceutical and Health Sciences; Kanazawa Ishikawa Japan
| | - Yuki Onishi
- Laboratory of Molecular Pharmacology, Division of Pharmaceutical Sciences; Kanazawa University Graduate School of Medical, Pharmaceutical and Health Sciences; Kanazawa Ishikawa Japan
| | - Tetsuhiro Horie
- Laboratory of Molecular Pharmacology, Division of Pharmaceutical Sciences; Kanazawa University Graduate School of Medical, Pharmaceutical and Health Sciences; Kanazawa Ishikawa Japan
| | - Yukio Yoneda
- Laboratory of Molecular Pharmacology, Division of Pharmaceutical Sciences; Kanazawa University Graduate School of Medical, Pharmaceutical and Health Sciences; Kanazawa Ishikawa Japan
| | - Takeshi Takarada
- Laboratory of Molecular Pharmacology, Division of Pharmaceutical Sciences; Kanazawa University Graduate School of Medical, Pharmaceutical and Health Sciences; Kanazawa Ishikawa Japan
| | - Eiichi Hinoi
- Laboratory of Molecular Pharmacology, Division of Pharmaceutical Sciences; Kanazawa University Graduate School of Medical, Pharmaceutical and Health Sciences; Kanazawa Ishikawa Japan
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10
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Abstract
The regulation of organ size is essential to human health and has fascinated biologists for centuries. Key to the growth process is the ability of most organs to integrate organ-extrinsic cues (eg, nutritional status, inflammatory processes) with organ-intrinsic information (eg, genetic programs, local signals) into a growth response that adapts to changing environmental conditions and ensures that the size of an organ is coordinated with the rest of the body. Paired organs such as the vertebrate limbs and the long bones within them are excellent models for studying this type of regulation because it is possible to manipulate one member of the pair and leave the other as an internal control. During development, growth plates at the end of each long bone produce a transient cartilage model that is progressively replaced by bone. Here, we review how proliferation and differentiation of cells within each growth plate are tightly controlled mainly by growth plate-intrinsic mechanisms that are additionally modulated by extrinsic signals. We also discuss the involvement of several signaling hubs in the integration and modulation of growth-related signals and how they could confer remarkable plasticity to the growth plate. Indeed, long bones have a significant ability for "catch-up growth" to attain normal size after a transient growth delay. We propose that the characterization of catch-up growth, in light of recent advances in physiology and cell biology, will provide long sought clues into the molecular mechanisms that underlie organ growth regulation. Importantly, catch-up growth early in life is commonly associated with metabolic disorders in adulthood, and this association is not completely understood. Further elucidation of the molecules and cellular interactions that influence organ size coordination should allow development of novel therapies for human growth disorders that are noninvasive and have minimal side effects.
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Affiliation(s)
- Alberto Roselló-Díez
- Developmental Biology Program, Sloan Kettering Institute, New York, New York 10065
| | - Alexandra L Joyner
- Developmental Biology Program, Sloan Kettering Institute, New York, New York 10065
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11
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Morphological Aspect and iNOS and Bax Expression Modification in Bone Tissue Around Dental Implants Positioned Using Piezoelectric Bone Surgery Versus Conventional Drill Technique. J Craniofac Surg 2015; 26:741-4. [DOI: 10.1097/scs.0000000000001540] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
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12
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Amin AR, Islam ABMMK. Genomic analysis and differential expression of HMG and S100A family in human arthritis: upregulated expression of chemokines, IL-8 and nitric oxide by HMGB1. DNA Cell Biol 2014; 33:550-65. [PMID: 24905701 DOI: 10.1089/dna.2013.2198] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
We applied global gene expression arrays, quantitative real-time PCR, immunostaining, and functional assays to untangle the role of High Mobility Groups proteins (HMGs) in human osteoarthritis (OA)-affected cartilage. Bioinformatics analysis showed increased mRNA expression of Damage-Associated Molecular Patterns (DAMPs): HMGA, HMGB, HMGN, SRY, LEF1, HMGB1, MMPs, and HMG/RAGE-interacting molecules (spondins and S100A4, S100A10, and S100A11) in human OA-affected cartilage as compared with normal cartilage. HMGB2 was down-regulated in human OA-affected cartilage. Immunohistological staining identified HMGB1 in chondrocytes in the superficial cartilage. Cells of the deep cartilage and subchondral bone showed increased expression of HMGB1 in OA-affected cartilage. HMGB1 was expressed in the nucleus, cytosol, and extracellular milieu of chondrocytes in cartilage. Furthermore, HMGB1 was spontaneously released from human OA-affected cartilage in ex vivo conditions. The effects of recombinant HMGB1 was tested on human cartilage and chondrocytes in vitro. HMGB1 stimulated mRNA of 2 NFκB gene enhancers (NFκB1 and NFκB2), 16 CC and CXC chemokines (IL-8, CCL2, CCL20, CCL3, CCL3L1, CCL3L3, CCL4, CCL4L1, CCL4L2, CCL5, CCL8, CXCL1, CXCL10, CXCL2, CXCL3, and CXCL6) by ≥10-fold. Furthermore, HMGB1 and IL-1β and/or tumor necrosis factor α (but not HMGI/Y) also significantly induced inducible nitric oxide synthase, NO, and interleukin (IL)-8 production in human cartilage and chondrocytes. The recombinant HMGB1 utilized in this study shows properties that are similar to disulfide-HMGB1. The differential, stage and/or tissue-specific expression of HMGB1, HMGB2, and S100A in cartilage was associated with regions of pathology and/or cartilage homeostasis in human OA-affected cartilage. Noteworthy similarities in the expression of mouse and human HMGB1 and HMGB2 were conserved in normal and arthritis-affected cartilage. The multifunctional forms of HMGB1 and S100A could perpetuate damage-induced cartilage inflammation in late-stage OA-affected joints similar to sterile inflammation. The paracrine effects of HMGB1 can induce chemokines and NO that are perceived to change cartilage homeostasis in human OA-affected cartilage.
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Affiliation(s)
- Ashok R Amin
- 1 Department of Bio-Medical Engineering, Virginia Tech and Virginia College of Osteopathic Medicine , RheuMatrix, Inc., Blacksburg, Virginia
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Fels L, Distl O. Identification and validation of quantitative trait loci (QTL) for canine hip dysplasia (CHD) in German Shepherd Dogs. PLoS One 2014; 9:e96618. [PMID: 24802516 PMCID: PMC4011879 DOI: 10.1371/journal.pone.0096618] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2013] [Accepted: 04/09/2014] [Indexed: 12/24/2022] Open
Abstract
Canine hip dysplasia (CHD) is the most common hereditary skeletal disorder in dogs. To identify common alleles associated with CHD, we genotyped 96 German Shepherd Dogs affected by mild, moderate and severe CHD and 96 breed, sex, age and birth year matched controls using the Affymetrix canine high density SNP chip. A mixed linear model analysis identified five SNPs associated with CHD scores on dog chromosomes (CFA) 19, 24, 26 and 34. These five SNPs were validated in a by sex, age, birth year and coancestry stratified sample of 843 German Shepherd Dogs including 277 unaffected dogs and 566 CHD-affected dogs. Mean coancestry coefficients among and within cases and controls were <0.1%. Genotype effects of these SNPs explained 20–32% of the phenotypic variance of CHD in German Shepherd Dogs employed for validation. Genome-wide significance in the validation data set could be shown for each one CHD-associated SNP on CFA24, 26 and 34. These SNPs are located within or in close proximity of genes involved in bone formation and related through a joint network. The present study validated positional candidate genes within two previously known quantitative trait loci (QTL) and a novel QTL for CHD in German Shepherd Dogs.
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Affiliation(s)
- Lena Fels
- Institute for Animal Breeding and Genetics, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Ottmar Distl
- Institute for Animal Breeding and Genetics, University of Veterinary Medicine Hannover, Hannover, Germany
- * E-mail:
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Fels L, Marschall Y, Philipp U, Distl O. Multiple loci associated with canine hip dysplasia (CHD) in German shepherd dogs. Mamm Genome 2014; 25:262-9. [PMID: 24691653 DOI: 10.1007/s00335-014-9507-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2013] [Accepted: 03/10/2014] [Indexed: 12/23/2022]
Abstract
Canine hip dysplasia (CHD) is the most common hereditary skeletal disorder in dogs. To identify common alleles associated with CHD, we developed 37 informative single nucleotide polymorphisms (SNPs) within 13 quantitative trait loci (QTL) previously identified for German shepherd dogs. These SNPs were genotyped in 95 German shepherd dogs affected by CHD and 95 breed, sex, and birth year-matched controls. A total of ten SNPs significant at a nominal P value of 0.05 were validated in 843 German shepherd dogs including 277 unaffected dogs and 566 CHD-affected dogs. Cases and controls were sampled from the whole German shepherd dog population in Germany in such a way that mean coancestry coefficients were below 0.1 % within cases and controls as well as among cases and controls. We identified nine SNPs significantly associated with CHD within five QTL on dog chromosomes (CFA) 3, 9, 26, 33, and 34. Genotype effects of these nine SNPs explained between 22 and 34 % of the phenotypic variance of hip dysplasia in German shepherd dogs. The strongest associated SNPs were located on CFA33 and 34 within the candidate genes PNCP, TRIO, and SLC6A3. Thus, the present study validated positional candidate genes within five QTL for CHD.
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Affiliation(s)
- Lena Fels
- Institute for Animal Breeding and Genetics, University of Veterinary Medicine Hannover, Bünteweg 17p, 30559, Hannover, Germany
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Park JK, Jang H, Hwang S, Kim EJ, Kim DE, Oh KB, Kwon DJ, Koh JT, Kimura K, Inoue H, Jang WG, Lee JW. ER stress-inducible ATF3 suppresses BMP2-induced ALP expression and activation in MC3T3-E1 cells. Biochem Biophys Res Commun 2013; 443:333-8. [PMID: 24315873 DOI: 10.1016/j.bbrc.2013.11.121] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2013] [Accepted: 11/28/2013] [Indexed: 12/14/2022]
Abstract
Endoplasmic reticulum (ER) stress suppresses osteoblast differentiation. Activating transcription factor (ATF) 3, a member of the ATF/cAMP response element-binding protein family of transcription factors, is induced by various stimuli including cytokines, hormones, DNA damage, and ER stress. However, the role of ATF3 in osteoblast differentiation has not been elucidated. Treatment with tunicamycin (TM), an ER stress inducer, increased ATF3 expression in the preosteoblast cell line, MC3T3-E1. Overexpression of ATF3 inhibited bone morphogenetic protein 2-stimulated expression and activation of alkaline phosphatase (ALP), an osteogenic marker. In addition, suppression of ALP expression by TM treatment was rescued by silencing of ATF3 using shRNA. Taken together, these data indicate that ATF3 is a novel negative regulator of osteoblast differentiation by specifically suppressing ALP gene expression in preosteoblasts.
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Affiliation(s)
- Jae-kyung Park
- Research Center of Integrative Cellulomics, Korea Research Institute of Bioscience and Biotechnology, Daejeon 305-806, Republic of Korea.
| | - Hoon Jang
- Research Center of Integrative Cellulomics, Korea Research Institute of Bioscience and Biotechnology, Daejeon 305-806, Republic of Korea; Functional Genomics, School of Engineering, University of Science and Technology (UST), Daejeon 305-806, Republic of Korea.
| | - SeongSoo Hwang
- Animal Biotechnology Division, National Institute of Animal Science, Rural Development Administration, Suwon, Republic of Korea.
| | - Eun-Jung Kim
- Research Center of Integrative Cellulomics, Korea Research Institute of Bioscience and Biotechnology, Daejeon 305-806, Republic of Korea.
| | - Dong-Ern Kim
- Research Center of Integrative Cellulomics, Korea Research Institute of Bioscience and Biotechnology, Daejeon 305-806, Republic of Korea.
| | - Keon-Bong Oh
- Animal Biotechnology Division, National Institute of Animal Science, Rural Development Administration, Suwon, Republic of Korea.
| | - Dae-Jin Kwon
- Animal Biotechnology Division, National Institute of Animal Science, Rural Development Administration, Suwon, Republic of Korea.
| | - Jeong-Tae Koh
- Dental Science Research Institute and BK21, School of Dentistry, Chonnam National University, Gwangju 500-757, Republic of Korea.
| | - Kumi Kimura
- Department of Physiology and Metabolism, Brain/Liver Interface Medicine Research Center, College of Medical, Pharmaceutical and Health Sciences, Kanazawa University, 13-1 Takara-machi, Kanazawa, Ishikawa 920-8641, Japan
| | - Hiroshi Inoue
- Department of Physiology and Metabolism, Brain/Liver Interface Medicine Research Center, College of Medical, Pharmaceutical and Health Sciences, Kanazawa University, 13-1 Takara-machi, Kanazawa, Ishikawa 920-8641, Japan.
| | - Won-Gu Jang
- Department of Biotechnology, School of Engineering, Daegu University, Gyeongbuk 712-714, Republic of Korea.
| | - Jeong-Woong Lee
- Research Center of Integrative Cellulomics, Korea Research Institute of Bioscience and Biotechnology, Daejeon 305-806, Republic of Korea; Functional Genomics, School of Engineering, University of Science and Technology (UST), Daejeon 305-806, Republic of Korea.
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Zhu S, Lu P, Liu H, Chen P, Wu Y, Wang Y, Sun H, Zhang X, Xia Q, Heng BC, Zhou Y, Ouyang HW. Inhibition of Rac1 activity by controlled release of NSC23766 from chitosan microspheres effectively ameliorates osteoarthritis development in vivo. Ann Rheum Dis 2013; 74:285-93. [PMID: 24257023 PMCID: PMC4283675 DOI: 10.1136/annrheumdis-2013-203901] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Background Osteoarthritis (OA) is a degenerative joint disease characterised by cartilage degradation and chondrocyte hypertrophy. A recent study showed that Rac1 promoted expression of MMP13 and chondrocyte hypertrophy within the growth plate. These findings warrant further investigations on the roles of Rac1 in OA development and therapy in animal models. Objective To investigate the role and mechanistic pathway of Rac1 involvement in pathological changes of OA chondrocytes in vitro and OA development in vivo, as well as to develop a strategy of modulating Rac1 activity for OA treatment. Material and methods OA and normal cartilage from human or mice were used for immunohistochemical study and Rac1 activity assay. Chondrocytes treated with IL1β and the untreated control were subjected to the Rac1 activity assay. Chondrocytes transfected with CA-Rac1, DN-Rac1 or GFP were cultured under conditions for inducing calcification. To evaluate the effect of Rac1 in OA development, an OA model was created by anterior cruciate ligament transection in mice. CA-Rac1, DN-Rac1 and GFP lentivirus, or NSC23766, were injected intra-articularly. Joints were subjected to histological analysis. Results It was found that there is aberrant Rac1 activation in human OA cartilage. Rac1 activity could also be elevated by IL1β. Additionally, activated Rac1 promoted expression of MMP13, ADAMTS-5 and COLX by chondrocytes, partially through the β-catenin pathway. Moreover, activation of Rac1 in knee joints by CA-Rac1 lentivirus accelerated OA progression, while inhibition of Rac1 activity by DN-Rac1 lentivirus or Rac1 inhibitor NSC23766 delayed OA development. Therefore, we developed a strategy of controlled release of NSC23766 from chitosan microspheres to OA joints, which effectively protected cartilage from destruction. Conclusions These findings demonstrated that Rac1 activity is implicated in OA development. Also, controlled release of Rac1 inhibitor is a promising strategy for OA treatment.
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Affiliation(s)
- Shouan Zhu
- Center for Stem Cell and Tissue Engineering, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China Zhejiang Provincial Key Lab for Tissue Engineering and Regenerative Medicine, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Ping Lu
- Center for Stem Cell and Tissue Engineering, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China Zhejiang Provincial Key Lab for Tissue Engineering and Regenerative Medicine, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Huanhuan Liu
- Center for Stem Cell and Tissue Engineering, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China Zhejiang Provincial Key Lab for Tissue Engineering and Regenerative Medicine, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Pengfei Chen
- Center for Stem Cell and Tissue Engineering, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China Zhejiang Provincial Key Lab for Tissue Engineering and Regenerative Medicine, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Yan Wu
- Center for Stem Cell and Tissue Engineering, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China Zhejiang Provincial Key Lab for Tissue Engineering and Regenerative Medicine, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Yanyan Wang
- Center for Stem Cell and Tissue Engineering, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China Zhejiang Provincial Key Lab for Tissue Engineering and Regenerative Medicine, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Heng Sun
- Center for Stem Cell and Tissue Engineering, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China Zhejiang Provincial Key Lab for Tissue Engineering and Regenerative Medicine, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Xiaolei Zhang
- Center for Stem Cell and Tissue Engineering, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China Zhejiang Provincial Key Lab for Tissue Engineering and Regenerative Medicine, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China Department of Orthopaedics, The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Qingqing Xia
- Center for Stem Cell and Tissue Engineering, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China Zhejiang Provincial Key Lab for Tissue Engineering and Regenerative Medicine, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Boon Chin Heng
- Department of Biosystems Science & Engineering, ETH-Zurich, Mattenstrasse, Switzerland
| | - Yiting Zhou
- Center for Stem Cell and Tissue Engineering, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China Department of Biochemistry and Molecular Biology, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Hong Wei Ouyang
- Center for Stem Cell and Tissue Engineering, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China Zhejiang Provincial Key Lab for Tissue Engineering and Regenerative Medicine, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
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Hamamura K, Zhang P, Zhao L, Shim JW, Chen A, Dodge TR, Wan Q, Shih H, Na S, Lin CC, Sun HB, Yokota H. Knee loading reduces MMP13 activity in the mouse cartilage. BMC Musculoskelet Disord 2013; 14:312. [PMID: 24180431 PMCID: PMC3924329 DOI: 10.1186/1471-2474-14-312] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/03/2013] [Accepted: 10/18/2013] [Indexed: 11/17/2022] Open
Abstract
Background Moderate loads with knee loading enhance bone formation, but its effects on the maintenance of the knee are not well understood. In this study, we examined the effects of knee loading on the activity of matrix metalloproteinase13 (MMP13) and evaluated the role of p38 MAPK and Rac1 GTPase in the regulation of MMP13. Methods Knee loading (0.5–3 N for 5 min) was applied to the right knee of surgically-induced osteoarthritis (OA) mice as well as normal (non-OA) mice, and MMP13 activity in the femoral cartilage was examined. The sham-loaded knee was used as a non-loading control. We also employed primary non-OA and OA human chondrocytes as well as C28/I2 chondrocyte cells, and examined MMP13 activity and molecular signaling in response to shear at 2–20 dyn/cm2. Results Daily knee loading at 1 N for 2 weeks suppressed cartilage destruction in the knee of OA mice. Induction of OA elevated MMP13 activity and knee loading at 1 N suppressed this elevation. MMP13 activity was also increased in primary OA chondrocytes, and this increase was attenuated by applying shear at 10 dyn/cm2. Load-driven reduction in MMP13 was associated with a decrease in the phosphorylation level of p38 MAPK (p-p38) and NFκB (p-NFκB). Molecular imaging using a fluorescence resonance energy transfer (FRET) technique showed that Rac1 activity was reduced by shear at 10 dyn/cm2 and elevated by it at 20 dyn/cm2. Silencing Rac1 GTPase significantly reduced MMP13 expression and p-p38 but not p-NFκB. Transfection of a constitutively active Rac1 GTPase mutant increased MMP13 activity, while a dominant negative mutant decreased it. Conclusions Knee loading reduces MMP13 activity at least in part through Rac1-mediated p38 MAPK signaling. This study suggests the possibility of knee loading as a therapy not only for strengthening bone but also preventing tissue degradation of the femoral cartilage.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | - Hiroki Yokota
- Department of Biomedical Engineering, Indiana University Purdue University Indianapolis, SL220C, 723 West Michigan Street, Indianapolis, IN 46202, USA.
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Suzuki D, Yamada A, Kamijo R. The essential roles of the small GTPase Rac1 in limb development. J Oral Biosci 2013. [DOI: 10.1016/j.job.2013.05.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Marmotti A, Bonasia DE, Bruzzone M, Rossi R, Castoldi F, Collo G, Realmuto C, Tarella C, Peretti GM. Human cartilage fragments in a composite scaffold for single-stage cartilage repair: an in vitro study of the chondrocyte migration and the influence of TGF-β1 and G-CSF. Knee Surg Sports Traumatol Arthrosc 2013; 21:1819-33. [PMID: 23143386 DOI: 10.1007/s00167-012-2244-7] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/05/2012] [Accepted: 10/05/2012] [Indexed: 12/20/2022]
Abstract
PURPOSE Minced chondral fragments are becoming popular as a source of cells for cartilage repair, as a growing interest is developing towards one-stage procedures to treat cartilage lesions. The purpose of this study is to (A) compare cell outgrowth from cartilage fragments of adult and young donors using two different types of scaffolds and (B) evaluate the influence of transforming-growth-factor-β1 (TGF-β1) and granulocyte colony-stimulating factor (G-CSF) on chondrocyte behaviour. METHODS In part (A) cartilage fragments from adult and young donors were either loaded onto an HA-derivative injectable paste scaffold or onto an HA-derivative membrane scaffold. Construct sections were then examined for cell counting after 1, 2 and 3 months. In part (B) only membrane scaffolds were prepared using cartilage fragments from young donors. Constructs were cultured either in standard growth medium or in the presence of specific growth factors, such as TGF-β1 or G-CSF or TGF-β1 + G-CSF. After 1 month, construct sections were examined for cell counting. Expression of chondrocyte markers (SOX9, CD151, CD49c) and proliferative markers (β-catenin, PCNA) was assessed using immunofluorescence techniques, both in unstimulated construct sections and in cells from unstimulated and stimulated construct cultures. RESULTS Part (A): histological analysis showed age-dependent and time-dependent chondrocyte migration. A significant difference (p < 0.05) was observed between young and older donors at the same time point. No difference was detected between the two types of scaffolds within the same group at the same time point. Part (B): after 1 month, the number of migrating cells/area significantly increased due to exposure to TGF-β1 and/or G-CSF (p < 0.05). Immunofluorescence revealed that outgrowing cells from unstimulated scaffold sections were positive for SOX9, CD151, CD49c and G-CSF receptor. Immunofluorescence of cells from construct cultures showed an increase in β-catenin in all stimulated groups and an increased PCNA expression in G-CSF-exposed cultures (p < 0.05). CONCLUSION Outgrowing cells may represent a subset of chondrocytes undergoing a phenotypic shift towards a proliferative state. TGF-β1, and to a greater extent G-CSF, may accelerate this outgrowth. The clinical relevance of this study may involve a potential future clinical application of scaffolds preloaded with growth factors as an additional coating for chondral fragments. Indeed, a controlled delivery of G-CSF, widely employed in various clinical settings, might improve the repair process driven by minced human cartilage fragments during one-stage cartilage repair.
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Affiliation(s)
- A Marmotti
- Department of Orthopaedics and Traumatology, University of Torino, Turin, Italy.
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Zhu S, Liu H, Wu Y, Heng BC, Chen P, Liu H, Ouyang HW. Wnt and Rho GTPase signaling in osteoarthritis development and intervention: implications for diagnosis and therapy. Arthritis Res Ther 2013; 15:217. [PMID: 23856044 PMCID: PMC3979163 DOI: 10.1186/ar4240] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
Wnt and Rho GTPase signaling play critical roles in governing numerous aspects of cell physiology, and have been shown to be involved in endochondral ossification and osteoarthritis (OA) development. In this review, current studies of canonical Wnt signaling in OA development, together with the differential roles of Rho GTPases in chondrocyte maturation and OA pathology are critically summarized. Based on the current scientific literature together with our preliminary results, the strategy of targeting Wnt and Rho GTPase for OA prognosis and therapy is suggested, which is instructive for clinical treatment of the disease.
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Yan Q, Feng Q, Beier F. Reduced chondrocyte proliferation, earlier cell cycle exit and increased apoptosis in neuronal nitric oxide synthase-deficient mice. Osteoarthritis Cartilage 2012; 20:144-51. [PMID: 22179029 DOI: 10.1016/j.joca.2011.11.014] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/28/2011] [Revised: 11/21/2011] [Accepted: 11/24/2011] [Indexed: 02/02/2023]
Abstract
OBJECTIVE Nitric oxide (NO) has been implicated in the local regulation of bone metabolism. However, the contribution made by specific nitric oxide synthase (NOS) enzymes to skeletal development is unclear. The objective of this study was to examine the effects of inactivation of neuronal nitric oxide synthase (nNOS) on cartilage development in mice. DESIGN Mice carrying a null mutation in the nNOS gene were used to address our objectives. Histological staining, immunohistochemistry and in situ analyses were employed along with real-time reverse transcriptase - polymerase chain reaction (RT-PCR). RESULTS nNOS-null mice show transient growth retardation and shorter long bones. nNOS-deficient growth plates show a reduction in replicating cells. Reduced chondrocyte numbers may in part be due to slower cell cycle progression and premature cell cycle exit caused by decreased cyclin D1 and increased p57 expression in mutants. In addition, apoptosis was increased as shown by increased cleaved-caspase 3 staining in hypertrophic chondrocytes in mutants. Real-time PCR demonstrated that expression of early chondrocyte markers such as Sox genes was reduced in mutant mice, while expression of prehypertrophic markers such as RORα was increased. Histological sections also demonstrated thinner cortical bone, fewer trabeculae and reduced mineralization in mutant mice. CONCLUSIONS These data identify an important role of nNOS in chondrocyte proliferation and endochondral bone growth and demonstrate that nNOS coordinates cell cycle exit and chondrocyte differentiation in cartilage development.
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Affiliation(s)
- Q Yan
- Department of Physiology and Pharmacology, Schulich School of Medicine and Dentistry, University of Western Ontario, London, ON, Canada
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