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Bailey KN, Alliston T. At the Crux of Joint Crosstalk: TGFβ Signaling in the Synovial Joint. Curr Rheumatol Rep 2022; 24:184-197. [PMID: 35499698 PMCID: PMC9184360 DOI: 10.1007/s11926-022-01074-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/11/2022] [Indexed: 11/24/2022]
Abstract
PURPOSE OF REVIEW The effect of the transforming growth factor beta (TGFβ) signaling pathway on joint homeostasis is tissue-specific, non-linear, and context-dependent, representing a unique complexity in targeting TGFβ signaling in joint disease. Here we discuss the variety of mechanisms that TGFβ signaling employs in the synovial joint to maintain healthy joint crosstalk and the ways in which aberrant TGFβ signaling can result in joint degeneration. RECENT FINDINGS Osteoarthritis (OA) epitomizes a condition of disordered joint crosstalk in which multiple joint tissues degenerate leading to overall joint deterioration. Synovial joint tissues, such as subchondral bone, articular cartilage, and synovium, as well as mesenchymal stem cells, each demonstrate aberrant TGFβ signaling during joint disease, whether by excessive or suppressed signaling, imbalance of canonical and non-canonical signaling, a perturbed mechanical microenvironment, or a distorted response to TGFβ signaling during aging. The synovial joint relies upon a sophisticated alliance among each joint tissue to maintain joint homeostasis. The TGFβ signaling pathway is a key regulator of the health of individual joint tissues, and the subsequent interaction among these different joint tissues, also known as joint crosstalk. Dissecting the sophisticated function of TGFβ signaling in the synovial joint is key to therapeutically interrogating the pathway to optimize overall joint health.
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Affiliation(s)
- Karsyn N Bailey
- Department of Orthopaedic Surgery, University of California San Francisco, 513 Parnassus Avenue, CA, 94143, San Francisco, USA
- UC Berkeley-UCSF Graduate Program in Bioengineering, San Francisco, CA, USA
| | - Tamara Alliston
- Department of Orthopaedic Surgery, University of California San Francisco, 513 Parnassus Avenue, CA, 94143, San Francisco, USA.
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Holzer L, Kraiger M, Talakic E, Fritz G, Avian A, Hofmeister A, Leithner A, Holzer G. Microstructural analysis of subchondral bone in knee osteoarthritis. Osteoporos Int 2020; 31:2037-2045. [PMID: 32472294 PMCID: PMC7497490 DOI: 10.1007/s00198-020-05461-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Accepted: 05/07/2020] [Indexed: 01/27/2023]
Abstract
UNLABELLED The results of this study show increased formation of bone in the subchondral areas in advanced stages of osteoarthritis of the knee. These changes seem to be influenced by mechanical factors. INTRODUCTION Subchondral bone changes seem to contribute to the progression of knee osteoarthritis (OA). This study aimed to analyze subchondral bone microstructure in specimens of late-stage knee OA in respect to articular cartilage damage, meniscus integrity, and knee joint alignment. METHODS Thirty proximal tibiae of 30 patients (20 female and 10 male) with late-stage OA retrieved during total knee arthroplasty were scanned using a high-resolution micro-computed tomography. The scans were semi-automatically segmented into five volumes of interest. The volumes of interest were then further analyzed using commercially available software. The degree of articular cartilage damage was assessed semi-quantitatively by magnetic resonance imaging before surgery. RESULTS The mean bone fraction volume (bone volume/total volume (BV/TV)) in all weight-bearing locations was significantly higher compared to the non-weight-bearing reference point below the anterior cruciate ligament (p = 0.000). The mean BV/TV in the medial compartment was significantly higher compared to the lateral compartment (p = 0.007). As for the BV/TV in intact menisci, there was a significantly lower subchondral bone fraction volume compared to subluxated or luxated menisci in the medial (p = 0.020) and lateral compartment (p = 0.005). Varus alignment had a significantly higher subchondral BV/TV in the medial compartment, whereas valgus alignment had a significantly higher subchondral BV/TV in the lateral compartment (p = 0.011). CONCLUSIONS The results show significant differences of subchondral bone microstructural parameters in respect to cartilage damage, meniscus' structural integrity, and knee joint alignment. Therefore, subchondral bone changes seem to be a secondary process in the late-stage OA of the knee caused by mechanical changes.
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Affiliation(s)
- L.A. Holzer
- grid.11598.340000 0000 8988 2476Department of Orthopaedics and Trauma, Medical University of Graz, Auenbruggerplatz 5, 8036 Graz, Austria
- AUVA Trauma Center Klagenfurt, Waidmannsdorfer Straße 35, Klagenfurt am Wörthersee, Austria
| | - M. Kraiger
- grid.410413.30000 0001 2294 748XInstitute of Medical Engineering, Graz University of Technology, Graz, Austria
| | - E. Talakic
- grid.11598.340000 0000 8988 2476Division of General Radiology, Department of Radiology, Medical University of Graz, Graz, Austria
| | - G.A. Fritz
- grid.11598.340000 0000 8988 2476Division of General Radiology, Department of Radiology, Medical University of Graz, Graz, Austria
| | - A. Avian
- grid.11598.340000 0000 8988 2476Institute for Medical Informatics, Statistics and Documentation, Medical University of Graz, Graz, Austria
| | - A. Hofmeister
- grid.11598.340000 0000 8988 2476PreClinical Imaging Group, Center for Biomedical Research, Medical University Graz, Graz, Austria
| | - A. Leithner
- grid.11598.340000 0000 8988 2476Department of Orthopaedics and Trauma, Medical University of Graz, Auenbruggerplatz 5, 8036 Graz, Austria
| | - G. Holzer
- grid.22937.3d0000 0000 9259 8492Department of Orthopaedics and Trauma Surgery, Medical University of Vienna, Vienna, Austria
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Shimamura M, Iwata K, Mashiba T, Miki T, Yamamoto T. Accumulation of microdamage in subchondral bone at the femoral head in patients with end-stage osteoarthritis of the hip. J Bone Miner Metab 2019; 37:880-885. [PMID: 30701320 DOI: 10.1007/s00774-019-00988-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Accepted: 01/10/2019] [Indexed: 01/13/2023]
Abstract
In end-stage osteoarthritis (OA) of the hip, the effect of bone metabolism with and without cartilage is unclear. In this study, we aimed to investigate histomorphology and microdamage in the subchondral bone of the femoral head in areas with and without articular cartilage in patients with end-stage OA. Nineteen femoral heads were evaluated in 10 women who underwent total hip arthroplasty for OA and in nine cadaveric controls (CNT). Chondral thickness and subchondral bone plate thickness (SBP.Th) were measured in 5-mm-wide areas where cartilage was lost (area A) or preserved (area B) in OA and in corresponding areas in the load-bearing portion of the femoral head in the CNT. Histomorphometry and microdamage in 5 × 5-mm areas of cancellous bone were assessed. SBP.Th and bone volume were significantly greater in area A than in area B or in the CNT. Osteoid volume was significantly greater in area A than in area B or in the CNT. There was no significant difference in eroded surface between area A and CNT. Microcrack density was significantly greater in area A than in area B or in the CNT. Although accumulation of microdamage was caused by concentration of stress on the subchondral bone in the cartilage loss area in end-stage OA, remodeling for microdamage repairing mechanism was not enhanced. It was considered that the subchondral cancellous bone volume was increased because of modeling, not remodeling, by stress concentration due to articular cartilage loss.
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Affiliation(s)
- Masashi Shimamura
- Department of Orthopaedic Surgery, Faculty of Medicine, Kagawa University, 1750-1 Ikenobe, Miki-cho, Kita-gun, Kagawa, 761-0793, Japan
| | - Ken Iwata
- Department of Orthopaedic Surgery, Faculty of Medicine, Kagawa University, 1750-1 Ikenobe, Miki-cho, Kita-gun, Kagawa, 761-0793, Japan.
| | - Tasuku Mashiba
- Department of Orthopaedic Surgery, Faculty of Medicine, Kagawa University, 1750-1 Ikenobe, Miki-cho, Kita-gun, Kagawa, 761-0793, Japan
| | - Takanori Miki
- Department of Anatomy and Neurobiology, Faculty of Medicine, Kagawa University, 1750-1 Ikenobe, Miki-cho, Kita-gun, Kagawa, 761-0793, Japan
| | - Tetsuji Yamamoto
- Department of Orthopaedic Surgery, Faculty of Medicine, Kagawa University, 1750-1 Ikenobe, Miki-cho, Kita-gun, Kagawa, 761-0793, Japan
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Wang J, An F, Cao Y, Gao H, Sun M, Ma C, Wu H, Zhang B, Liu W, Wang J. Association of TIMP4 gene variants with steroid-induced osteonecrosis of the femoral head in the population of northern China. PeerJ 2019; 7:e6270. [PMID: 30697482 PMCID: PMC6348097 DOI: 10.7717/peerj.6270] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Accepted: 12/09/2018] [Indexed: 12/14/2022] Open
Abstract
Background In clinical treatment, the use of steroid hormones is an important etiological factor of non-traumatic osteonecrosis of the femoral head (ONFH) risk. As an endogenous inhibitor of matrix metalloproteinases (MMPs) in the extracellular matrix, the expression of tissue inhibitors of metalloprotease-4 (TIMP4) plays an essential role in cartilage and bone tissue damage and remodeling, vasculitis formation, intravascular thrombosis, and lipid metabolism. Methods This study aimed to detect the association between TIMP4 polymorphism and steroid-induced ONFH. We genotyped seven single-nucleotide polymorphisms (SNPs) in TIMP4 genes and analyzed the association with steroid-induced ONFH from 286 steroid-induced ONFH patients and 309 normal individuals. Results We performed allelic model analysis and found that the minor alleles of five SNPs (rs99365, rs308952, rs3817004, rs2279750, and rs3755724) were associated with decreased steroid-induced ONFH (p = 0.02, p = 0.03, p = 0.04, p = 0.01, p = 0.04, respectively). rs2279750 showed a significant association with decreased risk of steroid-induced ONFH in the Dominant and Log-additive models (p = 0.042, p = 0.028, respectively), and rs9935, rs30892, and rs3817004 were associated with decreased risk in the Log-additive model (p = 0.038, p = 0.044, p = 0.042, respectively). In further stratification analysis, TIMP4 gene variants showed a significant association with steroid-induced ONFH in gender under the genotypes. Haplotype analysis also revealed that “TCAGAC” and “CCGGAA” sequences have protective effect on steroid-induced ONFH. Conclusion Our results indicate that five TIMP4 SNPs (rs99365, rs308952, rs3817004rs2279750, and rs3755724) are significantly associated with decreased risk of steroid-induced ONFH in the population of northern China.
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Affiliation(s)
- Jiaqi Wang
- Inner Mongolia Medical University, Hohhot, China
| | - Feimeng An
- Inner Mongolia Medical University, Hohhot, China
| | - Yuju Cao
- Zhengzhou Traditional Chinese Medicine Traumatology Hospital, Zhengzhou, China
| | - Hongyan Gao
- The Second Affiliated Hospital of Inner Mongolia Medical University, Hohhot, China
| | - Mingqi Sun
- The Second Affiliated Hospital of Inner Mongolia Medical University, Hohhot, China
| | - Chao Ma
- The Second Affiliated Hospital of Inner Mongolia Medical University, Hohhot, China
| | - Hao Wu
- The Second Affiliated Hospital of Inner Mongolia Medical University, Hohhot, China
| | - Baoxin Zhang
- The Second Affiliated Hospital of Inner Mongolia Medical University, Hohhot, China
| | - Wanlin Liu
- The Second Affiliated Hospital of Inner Mongolia Medical University, Hohhot, China
| | - Jianzhong Wang
- The Second Affiliated Hospital of Inner Mongolia Medical University, Hohhot, China
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Abstract
Background Osteoarthritis (OA) is the most common chronic disorder of joints; however, the key genes and transcription factors (TFs) associated with OA are still unclear. Through bioinformatics tools, the study aimed to understand the mechanism of genes associated with the development of OA. Methods Four gene expression profiling datasets were used to identify differentially expressed genes (DEGs) between OA and healthy control samples by a meta-analysis. Gene Ontology and Kyoto Encyclopedia of Genes and Genomes pathway enrichment analyses were performed with Multifaceted Analysis Tool for Human Transcriptome (MATHT). Subsequently, a protein–protein interaction (PPI) network was constructed for these DEGs. Significant network modules were identified using ReactomeFIViz, and the pathway of each module was enriched using MATHT. In addition, TFs in the DEGs were identified. Results In total, 690 DEGs were identified between OA and healthy control samples, including 449 upregulated and 241 downregulated DEGs. Additionally, 622 nodes and 2752 interactions constituted the PPI network, including 401 upregulated and 221 downregulated DEGs. Among them, FOS, TWIST1, POU2F1, SMARCA4, and CREBBP were also identified as TFs. RT-PCR results showed that the expression levels of Fos, Twist1, Pou2f1, Smarca4, and Crebbp decreased in mice with OA. In addition, FOS, TWIST1, SMARCA4, and CREBBP were involved in the positive regulation of transcription from the RNA polymerase II promoter. Conclusions TWIST1, POU2F1, SMARCA4, and CREBBP may play an important role in OA pathology.
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Affiliation(s)
- Honglai Tian
- Department of Orthopaedics, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, No. 16369 Jingshi Road, Lixia District, Jinan City, Shandong, 250014, China.
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Okura T, Matsushita M, Mishima K, Esaki R, Seki T, Ishiguro N, Kitoh H. Activated FGFR3 prevents subchondral bone sclerosis during the development of osteoarthritis in transgenic mice with achondroplasia. J Orthop Res 2018; 36:300-308. [PMID: 28520086 DOI: 10.1002/jor.23608] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/08/2016] [Accepted: 05/11/2017] [Indexed: 02/04/2023]
Abstract
The purpose of this study is to investigate the morphometric changes of the subchondral bone during the development of osteoarthritis (OA) in transgenic mice with achondroplasia (Fgfr3ach ) carrying a heterozygous gain-of-function mutation in Fgfr3. Two OA models (spontaneously developed with age: The aging model, and surgically induced by destabilization of the medial meniscus: The DMM model) were established. Articular cartilage, epiphysis, and metaphysis of the knee joint were histologically and morphometrically compared between wild-type mice, and Fgfr3ach mice in both OA models. Articular cartilage degeneration was scored according to the Osteoarthritis Research Society International (OARSI) scoring system. Several morphometric parameters including bone mineral density (BMD), bone volume/tissue volume (BV/TV), trabecular bone thickness (Tb.Th), and subchondral bone thickness in the medial tibial plateau (MTP) (Sb.Th med) were quantified by micro-computed tomography (CT). In the aging model, although there were no significant differences in the OARSI score between wild-type mice and Fgfr3ach mice, Sb.Th med and Tb.Th in the epiphysis significantly increased in wild-type mice. In the DMM model, the OARSI score of the medial compartment was significantly lower in Fgfr3ach mice than in wild-type mice. BMD, BV/TV, and Tb.Th in the epiphysis increased in wild-type mice and unchanged in Fgfr3ach mice, and the Sb.Th med was significantly larger in wild-type mice after surgery. Subchondral sclerosis, which preceded the cartilage degeneration, was inhibited in Fgfr3ach mice. Activated FGFR3 signaling prevented sclerotic changes of the subchondral bone and subsequent cartilage degeneration. © 2017 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 36:300-308, 2018.
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Affiliation(s)
- Toshiaki Okura
- Department of Orthopaedic Surgery, Nagoya University Graduate School of Medicine, 65 Tsurumai, Showa-ku, Nagoya, 466-8550, Japan
| | - Masaki Matsushita
- Department of Orthopaedic Surgery, Nagoya University Graduate School of Medicine, 65 Tsurumai, Showa-ku, Nagoya, 466-8550, Japan
| | - Kenichi Mishima
- Department of Orthopaedic Surgery, Nagoya University Graduate School of Medicine, 65 Tsurumai, Showa-ku, Nagoya, 466-8550, Japan
| | - Ryusaku Esaki
- Department of Orthopaedic Surgery, Nagoya University Graduate School of Medicine, 65 Tsurumai, Showa-ku, Nagoya, 466-8550, Japan
| | - Taisuke Seki
- Department of Orthopaedic Surgery, Nagoya University Graduate School of Medicine, 65 Tsurumai, Showa-ku, Nagoya, 466-8550, Japan
| | - Naoki Ishiguro
- Department of Orthopaedic Surgery, Nagoya University Graduate School of Medicine, 65 Tsurumai, Showa-ku, Nagoya, 466-8550, Japan
| | - Hiroshi Kitoh
- Department of Orthopaedic Surgery, Nagoya University Graduate School of Medicine, 65 Tsurumai, Showa-ku, Nagoya, 466-8550, Japan
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Extracellular Vesicles from Adipose-Derived Mesenchymal Stem Cells Downregulate Senescence Features in Osteoarthritic Osteoblasts. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2017; 2017:7197598. [PMID: 29230269 PMCID: PMC5694590 DOI: 10.1155/2017/7197598] [Citation(s) in RCA: 98] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/29/2017] [Accepted: 10/03/2017] [Indexed: 12/25/2022]
Abstract
Osteoarthritis (OA) affects all articular tissues leading to pain and disability. The dysregulation of bone metabolism may contribute to the progression of this condition. Adipose-derived mesenchymal stem cells (ASC) are attractive candidates in the search of novel strategies for OA treatment and exert anti-inflammatory and cytoprotective effects on cartilage. Chronic inflammation in OA is a relevant factor in the development of cellular senescence and joint degradation. In this study, we extend our previous observations of ASC paracrine effects to study the influence of conditioned medium and extracellular vesicles from ASC on senescence induced by inflammatory stress in OA osteoblasts. Our results in cells stimulated with interleukin- (IL-) 1β indicate that conditioned medium, microvesicles, and exosomes from ASC downregulate senescence-associated β-galactosidase activity and the accumulation of γH2AX foci. In addition, they reduced the production of inflammatory mediators, with the highest effect on IL-6 and prostaglandin E2. The control of mitochondrial membrane alterations and oxidative stress may provide a mechanism for the protective effects of ASC in OA osteoblasts. We have also shown that microvesicles and exosomes mediate the paracrine effects of ASC. Our study suggests that correction of abnormal osteoblast metabolism by ASC products may contribute to their protective effects.
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Bone-cartilage crosstalk: a conversation for understanding osteoarthritis. Bone Res 2016; 4:16028. [PMID: 27672480 PMCID: PMC5028726 DOI: 10.1038/boneres.2016.28] [Citation(s) in RCA: 148] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2016] [Accepted: 07/27/2016] [Indexed: 01/06/2023] Open
Abstract
Although cartilage degradation is the characteristic feature of osteoarthritis (OA), it is now recognized that the whole joint is involved in the progression of OA. In particular, the interaction (crosstalk) between cartilage and subchondral bone is thought to be a central feature of this process. The interface between articular cartilage and bone of articulating long bones is a unique zone, which comprises articular cartilage, below which is the calcified cartilage sitting on and intercalated into the subchondral bone plate. Below the subchondral plate is the trabecular bone at the end of the respective long bones. In OA, there are well-described progressive destructive changes in the articular cartilage, which parallel characteristic changes in the underlying bone. This review examines the evidence that biochemical and biomechanical signaling between these tissue compartments is important in OA disease progression and asks whether such signaling might provide possibilities for therapeutic intervention to halt or slow disease development.
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Klose-Jensen R, Hartlev LB, Boel LWT, Laursen MB, Stengaard-Pedersen K, Keller KK, Hauge EM. Subchondral bone turnover, but not bone volume, is increased in early stage osteoarthritic lesions in the human hip joint. Osteoarthritis Cartilage 2015; 23:2167-2173. [PMID: 26074361 DOI: 10.1016/j.joca.2015.06.001] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/16/2015] [Revised: 05/07/2015] [Accepted: 06/02/2015] [Indexed: 02/02/2023]
Abstract
OBJECTIVE The pathogenesis of osteoarthritis (OA) is not fully understood, but bone changes are suggested to be important. Bone turnover and bone volume (BV) in human hip OA were investigated in relation to the overlying cartilage degeneration using design-based stereological estimators. MATERIALS AND METHODS Femoral heads were obtained from 25 end-stage OA patients and 24 controls (CTL). Design-based stereological methods were used for sampling and quantification to obtain absolute estimates of volume and surface in the central trabecular and the subarticular bone region. The subarticular bone was further subdivided into regions according to the OARSI-score of the overlying articular cartilage in which erosion and osteoid surfaces were estimated. RESULTS In the subarticular region, bone volume (BV/TV) was 15.0% higher in OA patients compared to CTL; The fraction of erosive (ES/BS) and osteoid surfaces (OS/BS) were 56.2% and 72.8% higher in OA compared to CTL. In subarticular regions with none to mild cartilage degeneration (OARSI grade 0-2), ES/BS and OS/BS were 48.6% and 59.9% higher in OA compared to CTL, whereas BV/TV did not differ between OA and CTL. CONCLUSION In human end-stage hip OA, BV and bone turnover correlate with the degree of local cartilage degeneration. Subarticular bone sclerosis was only present in regions corresponding to end-stage OA. However, in regions with only none to mild cartilage degeneration the underlying bone had significantly higher turnover in OA patients compared to the control group, suggesting that high bone turnover may contribute to the early pathogenesis of OA.
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Affiliation(s)
- R Klose-Jensen
- Department of Rheumatology, Aarhus University Hospital, Aarhus, Denmark
| | - L B Hartlev
- Department of Rheumatology, Aarhus University Hospital, Aarhus, Denmark
| | - L W T Boel
- Institute of Forensic Medicine, Aarhus University, Aarhus, Denmark
| | - M B Laursen
- Hip and Knee Arthroplasty, Northern Orthopaedic Division, Aalborg University Hospital, Aalborg, Denmark
| | | | - K K Keller
- Department of Rheumatology, Aarhus University Hospital, Aarhus, Denmark
| | - E-M Hauge
- Department of Rheumatology, Aarhus University Hospital, Aarhus, Denmark.
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Abstract
There is now general agreement that osteoarthritis (OA) involves all structures in the affected joint, culminating in the degradation of the articular cartilage. It is appropriate to focus particularly on the subchondral bone because characteristic changes occur in this tissue with disease progression, either in parallel, or contributing to, the loss of cartilage volume and quality. Changes in both the articular cartilage and the subchondral bone are mediated by the cells in these two compartments, chondrocytes and cells of the osteoblast lineage, respectively, whose primary roles are to maintain the integrity and function of these tissues. In addition, altered rates of bone remodeling across the disease process are due to increased or decreased osteoclastic bone resorption. In the altered mechanical and biochemical environment of a progressively diseased joint, the cells function differently and show a different profile of gene expression, suggesting direct effects of these external influences. There is also ex vivo and in vitro evidence of chemical crosstalk between the cells in cartilage and subchondral bone, suggesting an interdependence of events in the two compartments and therefore indirect effects of, for example, altered loading of the joint. It is ultimately these cellular changes that explain the altered morphology of the cartilage and subchondral bone. With respect to crosstalk between the cells in cartilage and bone, there is evidence that small molecules can transit between these tissues. For larger molecules, such as inflammatory mediators, this is an intriguing possibility but remains to be demonstrated. The cellular changes during the progression of OA almost certainly need to be considered in a temporal and spatial manner, since it is important when and where observations are made in either human disease or animal models of OA. Until recently, comparisons have been made with the assumption, for example, that the subchondral bone is behaviorally uniform, but this is not the case in OA, where regional differences of the bone are evident using magnetic resonance imaging (MRI). Nevertheless, an appreciation of the altered cell function during the progression of OA will identify new disease modifying targets. If, indeed, the cartilage and subchondral bone behave as an interconnected functional unit, normalization of cell behavior in one compartment may have benefits in both tissues.
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Affiliation(s)
- David M Findlay
- Centre for Orthopaedic and Trauma Research, The University of Adelaide, Royal Adelaide Hospital, Level 4 Bice Building, Adelaide, South Australia, 5000, Australia,
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Chou CH, Lee CH, Lu LS, Song IW, Chuang HP, Kuo SY, Wu JY, Chen YT, Kraus VB, Wu CC, Lee MTM. Direct assessment of articular cartilage and underlying subchondral bone reveals a progressive gene expression change in human osteoarthritic knees. Osteoarthritis Cartilage 2013; 21:450-61. [PMID: 23220557 PMCID: PMC3593157 DOI: 10.1016/j.joca.2012.11.016] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/16/2012] [Revised: 11/20/2012] [Accepted: 11/28/2012] [Indexed: 02/02/2023]
Abstract
OBJECTIVE To evaluate the interaction of articular cartilage (AC) and subchondral bone (SB) through analysis of osteoarthritis (OA)-related genes of site-matched tissue. DESIGN We developed a novel method for isolating site-matched overlying AC and underlying SB from three and four regions of interest respectively from the human knee tibial plateau (n = 50). For each site, the severity of cartilage changes of OA were assessed histologically, and the severity of bone abnormalities were assessed by microcomputed tomography. An RNA isolation procedure was optimized that yielded high quality RNA from site-matched AC and SB tibial regions. Quantitative polymerase chain reaction (Q-PCR) analysis was performed to evaluate gene expression of 61 OA-associated genes for correlation with cartilage integrity and bone structure parameters. RESULTS A total of 27 (44%) genes were coordinately up- or down-regulated in both tissues. The expression levels of 19 genes were statistically significantly correlated with the severity of AC degeneration and changes of SB structure; these included: ADAMTS1, ASPN, BMP6, BMPER, CCL2, CCL8, COL5A1, COL6A3, COL7A1, COL16A1, FRZB, GDF10, MMP3, OGN, OMD, POSTN, PTGES, TNFSF11 and WNT1. CONCLUSIONS These results provide a strategy for identifying targets whose modification may have the potential to ameliorate pathological alterations and progression of disease in both AC and SB simultaneously. In addition, this is the first study, to our knowledge, to overcome the major difficulties related to isolation of high quality RNA from site-matched joint tissues. We expect this method to facilitate advances in our understanding of the coordinated molecular responses of the whole joint organ.
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Affiliation(s)
- Ching-Heng Chou
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
- National Center for Genome Medicine, Academia Sinica, Taipei, Taiwan
- Department of Pathology, Duke University Medical Center, Durham, NC, USA
| | - Chian-Her Lee
- Department of Orthopedics, School of Medicine, College of Medicine, Taipei Medical University, Department of Orthopedics, Taipei Medical University Hospital, Taiwan
| | - Liang-Suei Lu
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
- National Center for Genome Medicine, Academia Sinica, Taipei, Taiwan
| | - I-Wen Song
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
- National Center for Genome Medicine, Academia Sinica, Taipei, Taiwan
- Graduate Institute of Life Sciences, National Defense Medical Center, Taipei, Taiwan
| | - Hui-Ping Chuang
- Translational Resource Center for Genomic Medicine, Academia Sinica, Taipei, Taiwan
| | - San-Yuan Kuo
- Department of Rheumatology Immunology and Allergy Division, National Defense Medical Center, Taipei, Taiwan
| | - Jer-Yuarn Wu
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
- National Center for Genome Medicine, Academia Sinica, Taipei, Taiwan
- Translational Resource Center for Genomic Medicine, Academia Sinica, Taipei, Taiwan
| | - Yuan-Tsong Chen
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
- Department of Pediatrics Duke University Medical Center, Durham, NC, USA
| | - Virginia Byers Kraus
- Department of Medicine, Orthopaedic Surgery, Duke University Medical Center, Durham, NC, USA
- Department of Pathology, Duke University Medical Center, Durham, NC, USA
| | - Chia-Chun Wu
- Department of Orthopaedic Surgery, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan
| | - Ming Ta Michael Lee
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
- National Center for Genome Medicine, Academia Sinica, Taipei, Taiwan
- Graduate Institute of Chinese Medical Science, China Medical University, Taichung, Taiwan
- Laboratory for International Alliance, Center for Genomic Medicine, RIKEN, Yokohama, Japan
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Giner M, Montoya MJ, Vázquez MA, Miranda C, Pérez-Cano R. Differences in osteogenic and apoptotic genes between osteoporotic and osteoarthritic patients. BMC Musculoskelet Disord 2013; 14:41. [PMID: 23351916 PMCID: PMC3584899 DOI: 10.1186/1471-2474-14-41] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/19/2012] [Accepted: 01/22/2013] [Indexed: 12/13/2022] Open
Abstract
Background Osteoporosis is a metabolic disorder characterized by a reduction in bone mass and deterioration in the microarchitectural structure of the bone, leading to a higher risk for spontaneous and fragility fractures. The main aim was to study the differences between human bone from osteoporotic and osteoarthritic patients about gene expression (osteogenesis and apoptosis), bone mineral density, microstructural and biomechanic parameters. Methods We analyzed data from 12 subjects: 6 with osteoporotic hip fracture (OP) and 6 with hip osteoarthritis (OA), as the control group. All subjects underwent medical history, analytical determinations, densitometry, histomorphometric and biochemical study. The expression of 86 genes of osteogenesis and 86 genes of apoptosis was studied in pool of bone samples from patients with OP and OA by PCR array. Results We observed that most of the genes of apoptosis and osteogenesis show a decrease in gene expression in the osteoporotic group in comparison with the osteoarthritic group. The histomorphometric study shows a lower bone quality in the group of patients with hip fractures compared to the osteoarthritic group. Conclusions The bone tissue of osteoporotic fracture patients is more fragile than the bone of OA patients. Our results showed an osteoporotic bone with a lower capacities for differentiation and osteoblastic activity as well as a lower rate of apoptosis than osteoarthritic bone. These results are related with structural and biochemical parameters.
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Affiliation(s)
- Mercè Giner
- Bone Metabolism Unit, Internal Medicine, Virgen Macarena University Hospital, Avda, Dr, Fedriani s/n, 41009, Sevilla, Spain.
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Gao X, Lee J, Malladi S, Melendez L, Lascelles BDX, Al-Murrani S. Feline degenerative joint disease: a genomic and proteomic approach. J Feline Med Surg 2013; 15:466-77. [PMID: 23295270 DOI: 10.1177/1098612x12470652] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The underlying disease mechanisms for feline degenerative joint disease (DJD) are mostly unidentified. Today, most of what is published on mammalian arthritis is based on human clinical findings or on mammalian models of human arthritis. However, DJD is a common occurrence in the millions of domestic felines worldwide. To get a better understanding of the changes in biological pathways that are associated with feline DJD, this study employed a custom-designed feline GeneChip, and the institution's unique access to large sample populations to investigate genes and proteins from whole blood and serum that may be up- or down-regulated in DJD cats. The GeneChip results centered around three main pathways that were affected in DJD cats: immune function, apoptosis and oxidative phosphorylation. By identifying these key disease-associated pathways it will then be possible to better understand disease pathogenesis and diagnose it more easily, and to better target it with pharmaceutical and nutritional intervention.
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Kumarasinghe DD, Sullivan T, Kuliwaba JS, Fazzalari NL, Atkins GJ. Evidence for the dysregulated expression of TWIST1, TGFβ1 and SMAD3 in differentiating osteoblasts from primary hip osteoarthritis patients. Osteoarthritis Cartilage 2012; 20:1357-66. [PMID: 22820497 DOI: 10.1016/j.joca.2012.07.005] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/09/2012] [Revised: 07/05/2012] [Accepted: 07/11/2012] [Indexed: 02/02/2023]
Abstract
OBJECTIVE This study compared human primary osteoblasts derived from hip osteoarthritis (OA) cases against controls (CTLs) to investigate candidate OA disease genes, twist homologue 1 (TWIST1), wingless MMTV integration site family member 5B (WNT5B), transforming growth factor-β (TGFβ1) and SMAD family member 3 (SMAD3), during osteoblast differentiation, relative to calcium apposition and elemental mineral composition. MATERIALS & METHODS Primary osteoblast cultures were generated from intertrochanteric trabecular bone samples from five female primary hip OA cases and five age-matched female CTLs. During a 42-day differentiation time-course, alizarin red stains, energy-dispersive X-ray spectroscopy and real-time RT-polymerase chain reaction (PCR) were used to quantify calcium, elemental composition and gene expression, respectively. Data were analysed using linear mixed effects models and Pearson correlation matrices. RESULTS Significant differences, correlations and associations were found in OA and CTL osteoblasts between gene and mineral measures. The calcium: phosphorous (Ca:P) ratio was significantly more varied in OA compared to CTL. Calcium apposition, mineral composition as well as TWIST1 and TGFβ1 mRNA expression changed significantly over time. TWIST1 mRNA expression was elevated and correlated with SMAD3 mRNA levels in the OA cohort during the time-course. Associations were observed between tissue non-specific alkaline phosphatase (TNAP), osteocalcin (OCN), TWIST1, TGFβ1, SMAD3 mRNA levels and mineral measures in OA against CTL. Temporal differences between SMAD3 mRNA expression and mineral composition were also found in OA. CONCLUSIONS Dysregulated expression of TWIST1, TGFβ1 and SMAD3 mRNA observed in OA bone is reflected in the functionality of the osteoblast when these cells are cultured ex vivo. The results presented here are consistent with at least part of the aetiology of primary hip OA deriving from altered intrinsic properties of the osteoblast.
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Affiliation(s)
- D D Kumarasinghe
- Bone Cell Biology Group, Discipline of Orthopaedics & Trauma, The University of Adelaide, Adelaide, South Australia 5005, Australia
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Abstract
The classical view of the pathogenesis of osteoarthritis (OA) is that subchondral sclerosis is associated with, and perhaps causes, age-related joint degeneration. Recent observations have demonstrated that OA is associated with early loss of bone owing to increased bone remodelling, followed by slow turnover leading to densification of the subchondral plate and complete loss of cartilage. Subchondral densification is a late event in OA that involves only the subchondral plate and calcified cartilage; the subchondral cancellous bone beneath the subchondral plate may remain osteopenic. In experimental models, inducing subchondral sclerosis without allowing the prior stage of increased bone remodelling to occur does not lead to progressive OA. Therefore, both early-stage increased remodelling and bone loss, and the late-stage slow remodelling and subchondral densification are important components of the pathogenetic process that leads to OA. The apparent paradoxical observations that OA is associated with both increased remodelling and osteopenia, as well as decreased remodelling and sclerosis, are consistent with the spatial and temporal separation of these processes during joint degeneration. This Review provides an overview of current knowledge on OA and discusses the role of subchondral bone in the initiation and progression of OA. A hypothetical model of OA pathogenesis is proposed.
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Affiliation(s)
- David B Burr
- Department of Anatomy and Cell Biology, MS 5035, Indiana University School of Medicine, Indianapolis, IN 46202, USA.
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Mintzopoulos D, Ackerman JL, Song YQ. MRI of trabecular bone using a decay due to diffusion in the internal field contrast imaging sequence. J Magn Reson Imaging 2012; 34:361-71. [PMID: 21780229 DOI: 10.1002/jmri.22612] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
PURPOSE To characterize the DDIF (Decay due to Diffusion in the Internal Field) method using intact animal trabecular bone specimens of varying trabecular structure and porosity, under ex vivo conditions closely resembling in vivo physiological conditions. The DDIF method provides a diffusion contrast which is related to the surface-to-volume ratio of the porous structure of bones. DDIF has previously been used successfully to study marrow-free trabecular bone, but the DDIF contrast hitherto had not been tested in intact specimens containing marrow and surrounded by soft tissue. MATERIALS AND METHODS DDIF imaging was implemented on a 4.7 Tesla (T) small-bore, horizontal, animal scanner. Ex vivo results on fresh bone specimens containing marrow were obtained at body temperature. Control measurements were carried out in surrounding tissue and saline. RESULTS Significant DDIF effect was observed for trabecular bone samples, while it was considerably smaller for soft tissue outside the bone and for lipids. Additionally, significant differences were observed between specimens of different trabecular structure. CONCLUSION The DDIF contrast is feasible despite the reduction of the diffusion constant and of T(1) in such conditions, increasing our confidence that DDIF imaging in vivo may be clinically viable for bone characterization.
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Affiliation(s)
- Dionyssios Mintzopoulos
- Athinoula A Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Charlestown, Massachusetts 02129, USA.
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Clérigues V, Guillén MI, Castejón MA, Gomar F, Mirabet V, Alcaraz MJ. Heme oxygenase-1 mediates protective effects on inflammatory, catabolic and senescence responses induced by interleukin-1β in osteoarthritic osteoblasts. Biochem Pharmacol 2011; 83:395-405. [PMID: 22155307 DOI: 10.1016/j.bcp.2011.11.024] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2011] [Revised: 11/22/2011] [Accepted: 11/23/2011] [Indexed: 11/30/2022]
Abstract
Osteoarthritis (OA) is a chronic degenerative joint disease showing altered bone metabolism. Osteoblasts contribute to the regulation of cartilage metabolism and bone remodeling. We have shown previously that induction of heme oxygenase-1 (HO-1) protects OA cartilage against inflammatory and degradative responses. In this study, we investigated the effects of HO-1 induction on OA osteoblast metabolism. HO-1 was induced with cobalt protoporphyrin IX (CoPP) and by transduction with LV-HO-1. In osteoblasts stimulated with interleukin (IL)-1β, CoPP enhanced mineralization, the expression of a number of markers of osteoblast differentiation such as Runx2, bone morphogenetic protein-2, osteocalcin, and collagen 1A1 and 1A2, as well as the ratio osteoprotegerin/receptor activator of nuclear factor-κB ligand. HO-1 induction significantly reduced the expression of matrix metalloproteinase (MMP)-1, MMP-2 and MMP-3, and the production of pro-inflammatory cytokines such as tumor necrosis factor-α and IL-6 whereas IL-10 levels increased. HO-1 also exerted inhibitory effects on prostaglandin (PG)E(2) production which could be dependent on cyclooxygenase-2 and microsomal PGE synthase-1 down-regulation. The activity of senescence-associated β-galactosidase and the expression of the senescence marker caveolin-1 were significantly decreased after HO-1 induction. The inhibition of nuclear factor-κB activation induced by IL-1β in OA osteoblasts may contribute to some HO-1 effects. Our results have shown that HO-1 decreases the production of relevant inflammatory and catabolic mediators that participate in OA pathophysiology thus eliciting protective effects in OA osteoblasts.
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Affiliation(s)
- Victoria Clérigues
- Department of Pharmacology, University of Valencia, Burjasot, 46100 Valencia, Spain
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Kumarasinghe DD, Hopwood B, Kuliwaba JS, Atkins GJ, Fazzalari NL. An update on primary hip osteoarthritis including altered Wnt and TGF- associated gene expression from the bony component of the disease. Rheumatology (Oxford) 2011; 50:2166-75. [DOI: 10.1093/rheumatology/ker291] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Current world literature. Curr Opin Rheumatol 2011; 23:497-503. [PMID: 21844756 DOI: 10.1097/bor.0b013e32834a96c0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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