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Luo P, Yuan QL, Yang M, Wan X, Xu P. The role of cells and signal pathways in subchondral bone in osteoarthritis. Bone Joint Res 2023; 12:536-545. [PMID: 37678837 PMCID: PMC10484649 DOI: 10.1302/2046-3758.129.bjr-2023-0081.r1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 09/09/2023] Open
Abstract
Osteoarthritis (OA) is mainly caused by ageing, strain, trauma, and congenital joint abnormalities, resulting in articular cartilage degeneration. During the pathogenesis of OA, the changes in subchondral bone (SB) are not only secondary manifestations of OA, but also an active part of the disease, and are closely associated with the severity of OA. In different stages of OA, there were microstructural changes in SB. Osteocytes, osteoblasts, and osteoclasts in SB are important in the pathogenesis of OA. The signal transduction mechanism in SB is necessary to maintain the balance of a stable phenotype, extracellular matrix (ECM) synthesis, and bone remodelling between articular cartilage and SB. An imbalance in signal transduction can lead to reduced cartilage quality and SB thickening, which leads to the progression of OA. By understanding changes in SB in OA, researchers are exploring drugs that can regulate these changes, which will help to provide new ideas for the treatment of OA.
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Affiliation(s)
- Pan Luo
- Department of Joint Surgery, HongHui Hospital, Xi’an Jiaotong University, Xi'an, China
| | - Qi-ling Yuan
- Department of Joint Surgery, HongHui Hospital, Xi’an Jiaotong University, Xi'an, China
| | - Mingyi Yang
- Department of Joint Surgery, HongHui Hospital, Xi’an Jiaotong University, Xi'an, China
| | - Xianjie Wan
- Department of Joint Surgery, HongHui Hospital, Xi’an Jiaotong University, Xi'an, China
| | - Peng Xu
- Department of Joint Surgery, HongHui Hospital, Xi’an Jiaotong University, Xi'an, China
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Zhou S, Zhang G, Wang K, Yang Z, Tan Y. miR-141-3p Targeted SIRT1 to Inhibit Osteogenic Differentiation of Bone Marrow Mesenchymal Stem Cells. Stem Cells Int 2023; 2023:9094092. [PMID: 36777717 PMCID: PMC9918357 DOI: 10.1155/2023/9094092] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Revised: 10/18/2022] [Accepted: 11/24/2022] [Indexed: 02/05/2023] Open
Abstract
Purpose To explore the expression of miR-141-3p during the osteogenic differentiation of human bone marrow mesenchymal stem cells (BMSCs) and its regulatory effect. Methods Differentiation of BMSCs was induced by dexamethasone. The mRNA expression of miR-141-3p, ALP, RUNX2, and OCN was measured using RT-qPCR. The protein expression was detected via western blot. The target of miR-141-3p was predicted through the TargetScan website and confirmed using luciferase reporter assay. Results miR-141-3p expression declined during osteogenic differentiation. The relative ALP activities and the mRNA expression of ALP, RUNX2, and OCN were markedly reduced in the miR-141-3p mimic group while increased in the inhibitor group. Cell viability was suppressed in the miR-141-3p mimic group and promoted in the inhibitor group. SIRT1 was predicted to be a downstream gene of miR-141-3p, and this prediction was confirmed via the luciferase reporter assay. The results of the western blot assay demonstrated that SIRT1 expression was decreased in the miR-141-3p mimic group. SIRT1 reversed the inhibitory influence of miR-141-3p on the osteogenic differentiation ability of BMSCs. Conclusion miR-141-3p targeted SIRT1 to inhibit osteogenic differentiation of BMSCs via the Wnt/β-catenin signaling pathway.
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Affiliation(s)
- Shuzuo Zhou
- Department of Stomatology, Second Affiliated Hospital of Army Military Medical University (Xin Qiao Hospital), Chongqing City 400038, China
| | - Gang Zhang
- Department of Stomatology, Second Affiliated Hospital of Army Military Medical University (Xin Qiao Hospital), Chongqing City 400038, China
| | - Kun Wang
- Department of Stomatology, Second Affiliated Hospital of Army Military Medical University (Xin Qiao Hospital), Chongqing City 400038, China
| | - Zhong Yang
- Department of Stomatology, Second Affiliated Hospital of Army Military Medical University (Xin Qiao Hospital), Chongqing City 400038, China
| | - Yinghui Tan
- Department of Stomatology, Second Affiliated Hospital of Army Military Medical University (Xin Qiao Hospital), Chongqing City 400038, China
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Jiang S, Zhang C, Lu Y, Yuan F. Mechanical stress-caused chondrocyte dysfunction and cartilage injury can be attenuated by dioscin via activating sirtuin1/forkhead box O1. J Biochem Mol Toxicol 2022; 36:e23212. [PMID: 36106352 DOI: 10.1002/jbt.23212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 08/06/2022] [Accepted: 08/30/2022] [Indexed: 12/24/2022]
Abstract
Sirtuin1 (Sirt1)/forkhead box O1 (FoxO1) axis has been reported as a crucial regulator involved in chondral homeostasis of healthy or osteoarthritis (OA) cartilage. In our study, the aim is to investigate whether dioscin functions as an activator of Sirt1/FoxO1 to protect against mechanical stress-induced chondrocyte dysfunction in vitro and in vivo models. HERB and PubChem databases were implemented to predict dioscin-related gene targets. Cell and mouse models of OA were established to determine the pharmacological value of dioscin, a steroidal saponin. Cartilage loss in the knee joint was detected by Safranin O staining. Phosphorylation and nucleocytoplasmic shuttling of FoxO1 was observed in mechanical stress-stimulated chondrocyte and anterior cruciate ligament transection-induced cartilage injury. However, dioscin treatment repressed FoxO1 phosphorylation and cytoplasmic transfer and elevated Sirt1 protein expression. Dioscin treatment reversed mechanical stress-induced growth inhibition and apoptosis of chondrocytes and improved cartilage degradation and bone loss in the epiphysis of the distal femur. Moreover, dioscin could maintain the normal phenotype of chondrocytes via mediating multiple gene expressions. Dioscin inhibited apoptosis and metabolic disorders in OA-like chondrocytes via maintaining the transcriptional activity of FoxO1 and enhancing Sirt1 expression. Dioscin might be a potential Sirt1 activator providing a novel therapeutic schedule for the treatment of OA.
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Affiliation(s)
- Shilin Jiang
- Department of Orthopaedic Surgery, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University, Shanghai, China
| | - Chengyuan Zhang
- Department of Orthopaedic Surgery, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University, Shanghai, China
| | - Ye Lu
- Department of Orthopaedic Surgery, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University, Shanghai, China
| | - Feng Yuan
- Department of Orthopaedic Surgery, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University, Shanghai, China
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Epigenetic Regulation of Chondrocytes and Subchondral Bone in Osteoarthritis. Life (Basel) 2022; 12:life12040582. [PMID: 35455072 PMCID: PMC9030470 DOI: 10.3390/life12040582] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 03/30/2022] [Accepted: 04/04/2022] [Indexed: 12/24/2022] Open
Abstract
The aim of this review is to provide an updated review of the epigenetic factors involved in the onset and development of osteoarthritis (OA). OA is a prevalent degenerative joint disease characterized by chronic inflammation, ectopic bone formation within the joint, and physical and proteolytic cartilage degradation which result in chronic pain and loss of mobility. At present, no disease-modifying therapeutics exist for the prevention or treatment of the disease. Research has identified several OA risk factors including mechanical stressors, physical activity, obesity, traumatic joint injury, genetic predisposition, and age. Recently, there has been increased interest in identifying epigenetic factors involved in the pathogenesis of OA. In this review, we detail several of these epigenetic modifications with known functions in the onset and progression of the disease. We also review current therapeutics targeting aberrant epigenetic regulation as potential options for preventive or therapeutic treatment.
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Sirtuins as Interesting Players in the Course of HIV Infection and Comorbidities. Cells 2021; 10:cells10102739. [PMID: 34685718 PMCID: PMC8534645 DOI: 10.3390/cells10102739] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2021] [Revised: 10/07/2021] [Accepted: 10/11/2021] [Indexed: 02/07/2023] Open
Abstract
The sirtuins (SIRTs) are a family of enzymes from the group of NAD+-dependent deacetylases. Through the reaction of splitting the acetyl group of various transcription factors and histones they regulate many processes in the organism. The activity of sirtuins is linked to metabolic control, oxidative stress, inflammation and apoptosis, and they also affect the course of viral infections. For this reason, they may participate in the pathogenesis and development of many diseases, but little is known about their role in the course of human immunodeficiency virus (HIV) infection, which is the subject of this review. In the course of HIV infection, comorbidities such as: neurodegenerative disorders, obesity, insulin resistance and diabetes, lipid disorders and cardiovascular diseases, renal and bone diseases developed more frequently and faster compared to the general population. The role of sirtuins in the development of accompanying diseases in the course of HIV infection may also be interesting. There is still a lack of detailed information on this subject. The role of sirtuins, especially SIRT1, SIRT3, SIRT6, are indicated to be of great importance in the course of HIV infection and the development of the abovementioned comorbidities.
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Hu X, Feng G, Meng Z, Ma L, Jin Q. The protective mechanism of SIRT1 on cartilage through regulation of LEF-1. BMC Musculoskelet Disord 2021; 22:642. [PMID: 34315467 PMCID: PMC8317295 DOI: 10.1186/s12891-021-04516-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/21/2021] [Accepted: 07/07/2021] [Indexed: 01/03/2023] Open
Abstract
BACKGROUND Osteoarthritis (OA) is a chronic degenerative disease that suppresses middle-aged and older people worldwide. Silent information regulator 1(SIRT-1) is associated with several age-related diseases, such as cardiovascular diseases, neurodegenerative diseases and tumors, etc. The protective role of SIRT-1 in bone and joint diseases has become increasingly well known. OBJECTIVE To explore the relationship between SIRT-1 and its related factors in OA. METHODS Fresh tibial plateau specimens were collected from 30 patients with knee OA who underwent total knee arthroplasty. According to the results of Safranin O Fast Green Staining, hematoxylin-eosin staining and the OARSI grade developed by the International Association for the Study of Osteoarthropathy, the specimens were divided into the mild group, moderate group and severe group, and the damage of cartilage was evaluated. SIRT-1 protein levels in cartilage samples were analyzed by immunohistochemistry. Then, take 60 8-week-old female C57BL/6 J mice and apply the Destabilization of the medial meniscus (DMM) to induce OA. Mice were randomly divided into normal group (sham), model group (model), and post-modeling drug administration group (srt), and each group was further divided into 2 weeks after modeling (2 W) and 8 weeks after modeling (8 W) according to the time after surgery. The degenerative degree of a knee joint in mouse knee cartilage samples was evaluated using Safranin O Fast Green Staining and OARSI grade. Immunohistochemical techniques assessed the protein levels of SIRT-1, β-catenin, LEF-1, MMP-13 and Collagen II in cartilage samples. The protein levels of β-catenin, LEF-1 and MMP-13 in the samples were assessed by the immunohistofluorescence technique. The mRNA expression of SIRT-1 and LEF-1 in mouse cartilage samples was evaluated by real-time quantitative polymerase chain reaction (qPCR). RESULTS In the human cartilage samples, according to the results of Safranin O Fast Green Staining, compared with the mild group, the moderate group and the severe group showed damage cartilage layer structure, the number of chondrocytes decreased, the cell hypertrophic, the cartilage surface discontinuous, and the OARSI grade increased. The severe group had severe cartilage injury and the highest OARSI grade. In the mice cartilage samples, according to immunohistochemical analysis, the protein levels of β-catenin, LEF-1 and MMP-13 in cartilage specimens of model 2 W and model 8 W groups were significantly increased than the sham 2 W and sham 8 W groups. The protein levels of SIRT-1 and Collagen II were significantly decreased (P < 0.05), the results of srt 2 W and srt 8 W groups were between the sham group and the model group. According to immunofluorescence analysis, the protein levels of β-catenin, LEF-1 and MMP-13 in model 2 W and model 8 W groups were significantly increased than sham 2 W and sham 8 W groups. The results of srt 2w and srt 8w groups were between the sham group and the model group. According to the real-time qPCR results: Compared with sham 2 W and sham 8 W groups, the mRNA expression of SIRT-1 in model 2 W and model 8 W groups was significantly decreased, while the mRNA expression of LEF-1 was significantly increased. In contrast, the results of srt 2 W and srt 8 W groups were between the sham group and the model group. CONCLUSION SRT-1720, as a specific activator of SIRT-1, does increase the protein level of SIRT-1. SIRT-1 may play a protective role in cartilage by regulating the expression of LEF-1 and related inflammatory factors in OA.
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Affiliation(s)
- Xueyu Hu
- Ningxia Medical University, The General Hospital of Ningxia Medical University, Yinchuan, Ningxia, 750004, P.R. China
| | - Gangning Feng
- Ningxia Medical University, The General Hospital of Ningxia Medical University, Yinchuan, Ningxia, 750004, P.R. China
| | - Zhiqiang Meng
- Ningxia Medical University, The General Hospital of Ningxia Medical University, Yinchuan, Ningxia, 750004, P.R. China
| | - Long Ma
- Orthopedics Ward 3, The General Hospital of Ningxia Medical University, 804 Shengli South Street, Yinchuan, 750004, Ningxia, P.R. China
| | - Qunhua Jin
- Orthopedics Ward 3, The General Hospital of Ningxia Medical University, 804 Shengli South Street, Yinchuan, 750004, Ningxia, P.R. China.
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Hartley A, Gregson CL, Paternoster L, Tobias JH. Osteoarthritis: Insights Offered by the Study of Bone Mass Genetics. Curr Osteoporos Rep 2021; 19:115-122. [PMID: 33538965 PMCID: PMC8016765 DOI: 10.1007/s11914-021-00655-1] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 01/19/2021] [Indexed: 11/21/2022]
Abstract
PURPOSE OF REVIEW This paper reviews how bone genetics has contributed to our understanding of the pathogenesis of osteoarthritis. As well as identifying specific genetic mechanisms involved in osteoporosis which also contribute to osteoarthritis, we review whether bone mineral density (BMD) plays a causal role in OA development. RECENT FINDINGS We examined whether those genetically predisposed to elevated BMD are at increased risk of developing OA, using our high bone mass (HBM) cohort. HBM individuals were found to have a greater prevalence of OA compared with family controls and greater development of radiographic features of OA over 8 years, with predominantly osteophytic OA. Initial Mendelian randomisation analysis provided additional support for a causal effect of increased BMD on increased OA risk. In contrast, more recent investigation estimates this relationship to be bi-directional. However, both these findings could be explained instead by shared biological pathways. Pathways which contribute to BMD appear to play an important role in OA development, likely reflecting shared common mechanisms as opposed to a causal effect of raised BMD on OA. Studies in HBM individuals suggest this reflects an important role of mechanisms involved in bone formation in OA development; however further work is required to establish whether the same applies to more common forms of OA within the general population.
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Affiliation(s)
- A Hartley
- Musculoskeletal Research Unit, Translational Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK
- MRC Integrated Epidemiology Unit, Bristol Medical School, University of Bristol, Bristol, UK
| | - C L Gregson
- Musculoskeletal Research Unit, Translational Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK
- MRC Integrated Epidemiology Unit, Bristol Medical School, University of Bristol, Bristol, UK
| | - L Paternoster
- MRC Integrated Epidemiology Unit, Bristol Medical School, University of Bristol, Bristol, UK
| | - J H Tobias
- Musculoskeletal Research Unit, Translational Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK.
- MRC Integrated Epidemiology Unit, Bristol Medical School, University of Bristol, Bristol, UK.
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Chen Y, Zhou F, Liu H, Li J, Che H, Shen J, Luo E. SIRT1, a promising regulator of bone homeostasis. Life Sci 2021; 269:119041. [PMID: 33453243 DOI: 10.1016/j.lfs.2021.119041] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2020] [Revised: 12/29/2020] [Accepted: 01/06/2021] [Indexed: 12/16/2022]
Abstract
Sirtuin 1 (SIRT1), a nicotinamide adenine dinucleotide-dependent deacetylase, epigenetically regulates various cell metabolisms, including inflammation, tumorigenesis, and bone metabolism. Many clinical studies have found the potential of SIRT1 in predicting and treating bone-related disorders, such as osteoporosis and osteonecrosis, suggesting that SIRT1 might be a regulator of bone homeostasis. In order to identify the mechanisms that underlie the pivotal role of SIRT1 in bone homeostasis, many studies revealed that SIRT1 could maintain the balance between bone formation and absorption via regulating the ratio of osteoblasts to osteoclasts. SIRT1 controls the differentiation of mesenchymal stem cells (MSCs) and bone marrow-derived macrophages, increasing osteogenesis and reducing osteoclastogenesis. Besides, SIRT1 can enhance bone-forming cells' viability, including MSCs and osteoblasts under adverse conditions by resisting senescence, suppressing apoptosis, and promoting autophagy in favor of osteogenesis. Furthermore, the effect on bone vasculature homeostasis enables SIRT1 to become a valuable strategy for ischemic osteonecrosis and senile osteoporosis. The review systemically discusses SIRT1 pathways and the critical role in bone homeostasis and assesses whether SIRT1 is a potential target for manipulation and therapy, to lay a solid foundation for further researches in the future.
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Affiliation(s)
- Ye Chen
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China School of Stomatology, Sichuan University, Chengdu 610041, China
| | - Feng Zhou
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China School of Stomatology, Sichuan University, Chengdu 610041, China
| | - Hanghang Liu
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China School of Stomatology, Sichuan University, Chengdu 610041, China; Maine Medical Center Research Institute, Maine Medical Center, Scarborough, ME 04074, USA
| | - Jiaxuan Li
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China School of Stomatology, Sichuan University, Chengdu 610041, China
| | - Huiling Che
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China School of Stomatology, Sichuan University, Chengdu 610041, China
| | - Jiaqi Shen
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China School of Stomatology, Sichuan University, Chengdu 610041, China
| | - En Luo
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China School of Stomatology, Sichuan University, Chengdu 610041, China.
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Huang RX, Tao J. Nicotinamide mononucleotide attenuates glucocorticoid‑induced osteogenic inhibition by regulating the SIRT1/PGC‑1α signaling pathway. Mol Med Rep 2020; 22:145-154. [PMID: 32377728 PMCID: PMC7248519 DOI: 10.3892/mmr.2020.11116] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Accepted: 03/03/2020] [Indexed: 12/15/2022] Open
Abstract
Long-term and high-dose glucocorticoid treatment is recognized as an important influencing factor for osteoporosis and osteonecrosis. Nicotinamide mononucleotide (NMN) is an intermediate of NAD+ biosynthesis, and is widely used to replenish the levels of NAD+. However, the potential role of NMN in glucocorticoid-induced osteogenic inhibition remains to be demonstrated. In the present study, the protective effects of NMN on dexamethasone (Dex)-induced osteogenic inhibition, and its underlying mechanisms, were investigated. Bone mesenchymal stem cells were treated with Dex, which decreased the levels of the osteogenic markers alkaline phosphatase, Runt-related transcription factor 2 and osteocalcin. NMN treatment attenuated Dex-induced osteogenic inhibition and promoted the expression of sirtuin 1 (SIRT1) and peroxisome proliferator-activated receptor gamma coactivator (PGC)-1α. SIRT1 knockdown reversed the protective effects of NMN and reduced the expression levels of PGC-1α. Collectively, the results of the present study reveal that NMN may be a potential therapeutic target for glucocorticoid-induced osteoporosis.
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Affiliation(s)
- Rui-Xiong Huang
- Department of Orthopedics, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330000, P.R. China
| | - Jun Tao
- Department of Orthopedics, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330000, P.R. China
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Li L, Li M, Pang Y, Wang J, Wan Y, Zhu C, Yin Z. Abnormal thyroid hormone receptor signaling in osteoarthritic osteoblasts regulates microangiogenesis in subchondral bone. Life Sci 2019; 239:116975. [PMID: 31654748 DOI: 10.1016/j.lfs.2019.116975] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Revised: 10/11/2019] [Accepted: 10/14/2019] [Indexed: 02/07/2023]
Abstract
AIMS Previous study indicated that the increase of local bio-availability of 3'3'5-triiodothyronine (T3) influenced osteoarthritis (OA) initiation. We aimed to investigate the role of thyroid hormone receptors (THRs) signaling in OA osteoblasts. MATERIALS AND METHODS THRs expression in OA was detected by immunohistochemistry, immunofluorescence, RT-qPCR and western blotting. These effects on the expression of angiogenesis-related factors were examined after THRα or THRβ knockdown in OA osteoblasts. Fluorescence in situ hybridization was used to confirm the leading receptor for regulating angiogenesis-related factors. Co-culture model was utilized to observe the MMPs expression in chondrocytes after THRα knockdown in osteoblasts. The in vivo effects were also studied after intra-articular injection with THRα siRNA in OA model mice. Micro-CT and immunohistochemistry were employed to evaluate the changes of subchondral bone. KEY FINDINGS THRs expression and nuclear translocation were upregulated in human OA osteoblasts. Immunohistochemistry showed that angiogenic activities were increased in OA subchondral bone of human and mice. VEGF, HIF-1α and IGF-1, these THR downstream genes were downregulated after THRα knockdown in OA osteoblasts. Fluorescence in situ hybridization further indicated that THRα signaling mainly regulated VEGF expression. Intra-articular injection with THRα siRNA reduced angiogenic activities in OA model mice subchondral bone and ameliorated cartilage degradation. Micro-CT analysis displayed that the aberrant subchondral bone formation in OA was promoted. SIGNIFICANCE The microangiogenesis in subchondral bone may be partly attributed to abnormal THRα signaling in osteoblasts, and local inhibition of the THRα could be a potential target to treat OA.
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Affiliation(s)
- Lei Li
- Department of Orthopaedics, the first affiliated hospital of Anhui Medical Universtiy, #218 Jixi Road, Hefei, Anhui, China
| | - Meng Li
- Department of Orthopaedics, the first affiliated hospital of University of Science and Technology of China, #17 Lujiang Road, Hefei, Anhui, China
| | - Yiqun Pang
- Department of radiology, the first affiliated hospital of University of Science and Technology of China, #17 Lujiang Road, Hefei, Anhui, China
| | - Jun Wang
- Department of Orthopaedics, the first affiliated hospital of Anhui Medical Universtiy, #218 Jixi Road, Hefei, Anhui, China
| | - Yunpeng Wan
- Department of Orthopaedics, the first affiliated hospital of Anhui Medical Universtiy, #218 Jixi Road, Hefei, Anhui, China
| | - Chen Zhu
- Department of Orthopaedics, the first affiliated hospital of University of Science and Technology of China, #17 Lujiang Road, Hefei, Anhui, China.
| | - Zongsheng Yin
- Department of Orthopaedics, the first affiliated hospital of Anhui Medical Universtiy, #218 Jixi Road, Hefei, Anhui, China.
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Kovács B, Vajda E, Nagy EE. Regulatory Effects and Interactions of the Wnt and OPG-RANKL-RANK Signaling at the Bone-Cartilage Interface in Osteoarthritis. Int J Mol Sci 2019; 20:ijms20184653. [PMID: 31546898 PMCID: PMC6769977 DOI: 10.3390/ijms20184653] [Citation(s) in RCA: 112] [Impact Index Per Article: 22.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Revised: 09/12/2019] [Accepted: 09/18/2019] [Indexed: 01/05/2023] Open
Abstract
Cartilage and the bordering subchondral bone form a functionally active regulatory interface with a prominent role in osteoarthritis pathways. The Wnt and the OPG-RANKL-RANK signaling systems, as key mediators, interact in subchondral bone remodeling. Osteoarthritic osteoblasts polarize into two distinct phenotypes: a low secretory and an activated, pro-inflammatory and anti-resorptive subclass producing high quantities of IL-6, PGE2, and osteoprotegerin, but low levels of RANKL, thus acting as putative effectors of subchondral bone sclerosis. Wnt agonists, Wnt5a, Wisp-1 initiate excessive bone remodeling, while Wnt3a and 5a simultaneously cause loss of proteoglycans and phenotype shift in chondrocytes, with decreased expression of COL2A, aggrecan, and Sox-9. Sclerostin, a Wnt antagonist possesses a protective effect for the cartilage, while DKK-1 inhibits VEGF, suspending neoangiogenesis in the subchondral bone. Experimental conditions mimicking abnormal mechanical load, the pro-inflammatory milieu, but also a decreased OPG/RANKL ratio in the cartilage, trigger chondrocyte apoptosis and loss of the matrix via degradative matrix metalloproteinases, like MMP-13 or MMP-9. Hypoxia, an important cofactor exerts a dual role, promoting matrix synthesis via HIF-1α, a Wnt silencer, but turning on HIF-2α that enhances VEGF and MMP-13, along with aberrant collagen expression and extracellular matrix deterioration in the presence of pro-inflammatory cytokines.
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Affiliation(s)
- Béla Kovács
- Department of Biochemistry and Environmental Chemistry, University of Medicine, Pharmacy, Sciences and Technology, Tîrgu Mureș, Romania.
| | - Enikő Vajda
- Department of Biochemistry and Environmental Chemistry, University of Medicine, Pharmacy, Sciences and Technology, Tîrgu Mureș, Romania.
| | - Előd Ernő Nagy
- Department of Biochemistry and Environmental Chemistry, University of Medicine, Pharmacy, Sciences and Technology, Tîrgu Mureș, Romania.
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Wang Y, Fan X, Xing L, Tian F. Wnt signaling: a promising target for osteoarthritis therapy. Cell Commun Signal 2019; 17:97. [PMID: 31420042 PMCID: PMC6697957 DOI: 10.1186/s12964-019-0411-x] [Citation(s) in RCA: 117] [Impact Index Per Article: 23.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Accepted: 08/05/2019] [Indexed: 02/07/2023] Open
Abstract
Osteoarthritis (OA) is the most common joint disease worldwide and a leading cause of disability. Characterized by degradation of articular cartilage, synovial inflammation, and changes in periarticular and subchondral bone, OA can negatively impact an individual's physical and mental well-being. Recent studies have reported several critical signaling pathways as key regulators and activators of cellular and molecular processes during OA development. Wnt signaling is one such pathway whose signaling molecules and regulators were shown to be abnormally activated or suppressed. As such, agonists and antagonists of those molecules are potential candidates for OA treatment. Notably, a recent phase I clinical trial (NCT02095548) demonstrated the potential of SM04690, a small-molecule inhibitor of the Wnt signaling pathway, as a disease-modifying oseoarthritis drug (DMOAD). This review summarizes the role and mechanism of Wnt signaling and related molecules in regulating OA progression, with a view to accelerating the translation of such evidence into the development of strategies for OA treatment, particularly with respect to potential applications of molecules targeting the Wnt signaling pathway.
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Affiliation(s)
- Yudan Wang
- Medical Research Center, North China University of Science and Technology, Bohai Road 21, Caofeidian Dis, Tangshan, Hebei 063210 People’s Republic of China
| | - Xinhao Fan
- Department of Stomatology, Kailuan General Hospital, Tangshan, Hebei 063000 People’s Republic of China
| | - Lei Xing
- Department of Geriatrics, Affiliated hospital of North China University of Science and Technology, Jianshe South Road 57, Tangshan, Hebei 063000 People’s Republic of China
| | - Faming Tian
- Medical Research Center, North China University of Science and Technology, Bohai Road 21, Caofeidian Dis, Tangshan, Hebei 063210 People’s Republic of China
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Yang G, Singh S, Chen Y, Hamadeh IS, Langaee T, McDonough CW, Holliday LS, Lamba JK, Moreb JS, Katz J, Gong Y. Pharmacogenomics of osteonecrosis of the jaw. Bone 2019; 124:75-82. [PMID: 31022475 DOI: 10.1016/j.bone.2019.04.010] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/28/2019] [Accepted: 04/20/2019] [Indexed: 01/18/2023]
Abstract
Osteonecrosis of the jaw (ONJ) is a rare but serious drug induced adverse event, mainly associated with the use of antiresorptive medications, such as intravenous (IV) bisphosphonates (BPs) in cancer patients. In this review, we evaluated all the pharmacogenomic association studies for ONJ published up to December 2018. To date, two SNPs (CYP2C8 rs1934951 and RBMS3 rs17024608) were identified to be associated with ONJ by two genome-wide association studies (GWAS). However, all six subsequent candidate gene studies failed to replicate these results. In addition, six discovery candidate gene studies tried to identify the genetic markers in several genes associated with bone remodeling, bone mineral density, or osteoporosis. After evaluating the results of these 6 studies, none of the SNPs was significantly associated with ONJ. Recently, two whole-exome sequencing (WES) analysis (including one from our group) were performed to identify variants associated with ONJ. So far, only our study successfully replicated discovery result indicating SIRT1 SNP rs7896005 to be associated with ONJ. However, this SNP also did not reach genome-wide significance. The major limitations of these studies include lack of replication phases and limited sample sizes. Even though some studies had larger sample sizes, they recruited healthy individuals as controls, not subjects treated with BPs. We conclude that a GWAS with a larger sample size followed by replication phase will be needed to fully investigate the pharmacogenomic markers of ONJ.
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Affiliation(s)
- Guang Yang
- Department of Pharmacotherapy and Translational Research, Center for Pharmacogenomics and Precision Medicine, College of Pharmacy, University of Florida, Gainesville, FL, USA
| | - Sonal Singh
- Department of Pharmacotherapy and Translational Research, Center for Pharmacogenomics and Precision Medicine, College of Pharmacy, University of Florida, Gainesville, FL, USA
| | - Yiqing Chen
- Department of Pharmacotherapy and Translational Research, Center for Pharmacogenomics and Precision Medicine, College of Pharmacy, University of Florida, Gainesville, FL, USA
| | - Issam S Hamadeh
- Cancer Pharmacology Department, Levine Cancer Institute, Charlotte, NC, USA
| | - Taimour Langaee
- Department of Pharmacotherapy and Translational Research, Center for Pharmacogenomics and Precision Medicine, College of Pharmacy, University of Florida, Gainesville, FL, USA
| | - Caitrin W McDonough
- Department of Pharmacotherapy and Translational Research, Center for Pharmacogenomics and Precision Medicine, College of Pharmacy, University of Florida, Gainesville, FL, USA
| | - L Shannon Holliday
- Department of Orthodontics, College of Dentistry, University of Florida, Gainesville, FL, USA
| | - Jatinder K Lamba
- Department of Pharmacotherapy and Translational Research, Center for Pharmacogenomics and Precision Medicine, College of Pharmacy, University of Florida, Gainesville, FL, USA; UF Health Cancer Center, Gainesville, FL, USA
| | - Jan S Moreb
- Novant Health Forsyth Medical Center, Hematology, Transplantation and Cellular Therapy Division, Winston-Salem, NC, USA
| | - Joseph Katz
- Department of Oral Medicine, College of Dentistry, University of Florida, Gainesville, FL, USA
| | - Yan Gong
- Department of Pharmacotherapy and Translational Research, Center for Pharmacogenomics and Precision Medicine, College of Pharmacy, University of Florida, Gainesville, FL, USA; UF Health Cancer Center, Gainesville, FL, USA.
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The role of sirtuin 1 and its activator, resveratrol in osteoarthritis. Biosci Rep 2019; 39:BSR20190189. [PMID: 30996115 PMCID: PMC6509056 DOI: 10.1042/bsr20190189] [Citation(s) in RCA: 65] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Revised: 04/05/2019] [Accepted: 04/15/2019] [Indexed: 12/19/2022] Open
Abstract
Osteoarthitis (OA) is the most common aging-related joint pathology; the aging process results in changes to joint tissues that ultimately contribute to the development of OA. Articular chondrocytes exhibit an aging-related decline in their proliferative and synthetic capacity. Sirtuin 1 (SIRT 1), a longevity gene related to many diseases associated with aging, is a nicotinamide adenine dinucleotide (NAD+)-dependent protein deacetylase and master metabolic regulator. Along with its natural activator resveratrol, SIRT 1 actively participates in the OA pathological progress. SIRT 1 expression in osteoarthritic cartilage decreases in the disease progression of OA; it appears to play a predominantly regulatory role in OA. SIRT 1 can regulate the expression of extracellular matrix (ECM)-related proteins; promote mesenchymal stem cell differentiation; play anti-catabolic, anti-inflammatory, anti-oxidative stress, and anti-apoptosis roles; participate in the autophagic process; and regulate bone homeostasis in OA. Resveratrol can activate SIRT 1 in order to inhibit OA disease progression. In the future, activating SIRT 1 via resveratrol with improved bioavailability may be an appropriate therapeutic approach for OA.
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Regulation of Osteoclast Differentiation and Skeletal Maintenance by Histone Deacetylases. Molecules 2019; 24:molecules24071355. [PMID: 30959867 PMCID: PMC6479495 DOI: 10.3390/molecules24071355] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Revised: 03/28/2019] [Accepted: 04/04/2019] [Indexed: 12/21/2022] Open
Abstract
Bone is a dynamic tissue that must respond to developmental, repair, and remodeling cues in a rapid manner with changes in gene expression. Carefully-coordinated cycles of bone resorption and formation are essential for healthy skeletal growth and maintenance. Osteoclasts are large, multinucleated cells that are responsible for breaking down bone by secreting acids to dissolve the bone mineral and proteolytic enzymes that degrade the bone extracellular matrix. Increased osteoclast activity has a severe impact on skeletal health, and therefore, osteoclasts represent an important therapeutic target in skeletal diseases, such as osteoporosis. Progression from multipotent progenitors into specialized, terminally-differentiated cells involves carefully-regulated patterns of gene expression to control lineage specification and emergence of the cellular phenotype. This process requires coordinated action of transcription factors with co-activators and co-repressors to bring about proper activation and inhibition of gene expression. Histone deacetylases (HDACs) are an important group of transcriptional co-repressors best known for reducing gene expression via removal of acetyl modifications from histones at HDAC target genes. This review will cover the progress that has been made recently to understand the role of HDACs and their targets in regulating osteoclast differentiation and activity and, thus, serve as potential therapeutic target.
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Abstract
The sirtuin family of NAD+-dependent protein deacetylases promotes longevity and counteracts age-related diseases. One of the major targets of Sirtuins are the FoxO family of transcription factors. FoxOs play a major role in the adaptation of cells to a variety of stressors such as oxidative stress and growth factor deprivation. Studies with murine models of cell-specific loss- or gain-of-function of Sirtuins or FoxOs and with Sirtuin1 stimulators have provided novel insights into the function and signaling of these proteins on the skeleton. These studies have revealed that both Sirtuins and FoxOs acting directly in cartilage and bone cells are critical for normal skeletal development, homeostasis and that their dysregulation might contribute to skeletal disease. Deacetylation of FoxOs by Sirt1 in osteoblasts and osteoclasts stimulates bone formation and inhibits bone resorption, making Sirt1 ligands promising therapeutic agents for diseases of low bone mass. While a similar link has not been established in chondrocytes, Sirt1 and FoxOs both have chondroprotective actions, suggesting that Sirt1 activators may have similar efficacy in preventing cartilage degeneration due to aging or injury. In this review we summarize these advances and discuss their implications for the pathogenesis of age-related osteoporosis and osteoarthritis.
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Affiliation(s)
- Maria Almeida
- Department of Medicine, Center for Osteoporosis and Metabolic Bone Diseases, University of Arkansas for Medical Sciences, Little Rock, AR, USA; Department of Orthopedics, University of Arkansas for Medical Sciences, Little Rock, AR, USA.
| | - Ryan M Porter
- Department of Medicine, Center for Osteoporosis and Metabolic Bone Diseases, University of Arkansas for Medical Sciences, Little Rock, AR, USA; Department of Orthopedics, University of Arkansas for Medical Sciences, Little Rock, AR, USA
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Li P, Wang Y, Liu X, Zhou Z, Wang J, Zhou H, Zheng L, Yang L. Atypical antipsychotics induce human osteoblasts apoptosis via Wnt/β-catenin signaling. BMC Pharmacol Toxicol 2019; 20:10. [PMID: 30755277 PMCID: PMC6373048 DOI: 10.1186/s40360-019-0287-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2018] [Accepted: 01/22/2019] [Indexed: 01/13/2023] Open
Abstract
Background There is evidence that atypical antipsychotics (APs) increase risk of osteoporosis in schizophrenia patients, however the mechanism is unclear. The aim of the study was to explore the molecular mechanisms about Wnt/β-catenin signal pathway underlying the osteal side effects of APs. Methods We cultured human osteoblast cell line hFob1. 19 (OB) treatments with olanzapine, risperidone, amisulpride, aripiprazole or resveratrol in vitro. OB cells viability was detected by cell viability assay. OB cells apoptosis was analyzed by flow cytometry (FCM). Further apoptosis-related marker and β-catenin expression was analyzed by Western blot and Immunofluorescence analysis. Results Compared with the control group, proliferation of OB cells decreased and apoptosis rates of OB cells increased significantly in APs group (p < 0.05). There were a reduced level of Bcl-2, Mcl-1 (antiapoptotic marker) and an elevated level of Bax, Cleaved-Caspase3 (proapoptotic marker) in APs group (p < 0.05). Simultaneously, β-catenin expression decreased in cytoplasm and nucleus (p < 0.05). Compared with the just APs group, the apoptosis rates decreased and β-catenin expression increased significantly in resevratrol combined with APs group (p < 0.05). Correlation analysis showed positive correlation between β-catenin expression and the apoptotic rate in OB cells (r = − 0.515, p < 0.05). Conclusions APs cause OB cells apoptosis relating to Wnt/β-catenin signaling while resevratrol could reverse this phenomenon. Our study could lay the foundation for overcoming the APs-induced osteal side effects to improve the life quality of schizophrenia patients.
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Affiliation(s)
- Peifan Li
- Department of Psychiatry, Hospital Affiliated to Guizhou Medical University, Guiyang, 550004, Guizhou, China
| | - Yiming Wang
- Department of Psychiatry, Hospital Affiliated to Guizhou Medical University, Guiyang, 550004, Guizhou, China. .,Neuroelectrophysiological testing center, Hospital Affiliated to Guizhou Medical University, Guiyang, 550004, Guizhou, China. .,Undergraduate mental health education and counseling center, Guizhou Medical University, Guiyang, 550004, Guizhou, China.
| | - Xingde Liu
- Department of Cardiology, Hospital Affiliated to Guizhou Medical University, Guiyang, 550004, Guizhou, China.
| | - Zhen Zhou
- Clinical research center, Hospital Affiliated to Guizhou Medical University, Guiyang, 550004, Guizhou, China
| | - Jun Wang
- Clinical research center, Hospital Affiliated to Guizhou Medical University, Guiyang, 550004, Guizhou, China
| | - Haiyan Zhou
- Clinical research center, Hospital Affiliated to Guizhou Medical University, Guiyang, 550004, Guizhou, China
| | - Lei Zheng
- Department of Psychiatry, Hospital Affiliated to Guizhou Medical University, Guiyang, 550004, Guizhou, China
| | - Lixia Yang
- Department of Psychiatry, Hospital Affiliated to Guizhou Medical University, Guiyang, 550004, Guizhou, China
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Hu Q, Sun Y, Li Y, Shi H, Teng J, Liu H, Cheng X, Ye J, Su Y, Yin Y, Liu M, Wang J, Yang C. Anti-SIRT1 autoantibody is elevated in ankylosing spondylitis: a potential disease biomarker. BMC Immunol 2018; 19:38. [PMID: 30558548 PMCID: PMC6298004 DOI: 10.1186/s12865-018-0280-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Accepted: 12/03/2018] [Indexed: 01/01/2023] Open
Abstract
Background Little is known about the presence of specific autoantibodies in ankylosing spondylitis (AS), an immune-mediated inflammatory disease. The object of this study was to explore potential autoantibody profiles in AS patients. Results Levels of anti-SIRT1 autoantibodies were significantly higher in AS (P < 0.001) and psoriatic arthritis (PsA) (P < 0.01) patients but not rheumatoid arthritis (RA) patients compared with healthy controls. Additionally, titers of anti-NAD-dependent protein deacetylase sirtuin-1(SIRT1) antibodies were significantly higher in AS patients than in RA (P < 0.05) and PsA (P < 0.05) patients. Moreover, levels of anti-SIRT1 (P < 0.001) antibodies were significantly higher during the first year in patients with hip joint involvement. The anti-SIRT1 antibody positivity rate was 18.9% in AS patients. Conclusions Our findings indicate that anti-SIRT1 autoantibodies may serve as a marker for diagnosing AS and predicting hip joint involvement at an early stage. Electronic supplementary material The online version of this article (10.1186/s12865-018-0280-x) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Qiongyi Hu
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, No. 197 Ruijin Second Road, Shanghai, 200025, China
| | - Yue Sun
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, No. 197 Ruijin Second Road, Shanghai, 200025, China
| | - Yuan Li
- State Key Laboratory of Genetic Engineering and Ministry of Education (MOE) Key Laboratory of Contemporary Anthropology, Collaborative Innovation Center for Genetics and Development, School of Life Sciences, Fudan University, Shanghai, 200438, China
| | - Hui Shi
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, No. 197 Ruijin Second Road, Shanghai, 200025, China
| | - Jialin Teng
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, No. 197 Ruijin Second Road, Shanghai, 200025, China
| | - Honglei Liu
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, No. 197 Ruijin Second Road, Shanghai, 200025, China
| | - Xiaobing Cheng
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, No. 197 Ruijin Second Road, Shanghai, 200025, China
| | - Junna Ye
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, No. 197 Ruijin Second Road, Shanghai, 200025, China
| | - Yutong Su
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, No. 197 Ruijin Second Road, Shanghai, 200025, China
| | - Yufeng Yin
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, No. 197 Ruijin Second Road, Shanghai, 200025, China
| | - Mengru Liu
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, No. 197 Ruijin Second Road, Shanghai, 200025, China
| | - Jiucun Wang
- State Key Laboratory of Genetic Engineering and Ministry of Education (MOE) Key Laboratory of Contemporary Anthropology, Collaborative Innovation Center for Genetics and Development, School of Life Sciences, Fudan University, Shanghai, 200438, China.
| | - Chengde Yang
- Department of Rheumatology and Immunology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, No. 197 Ruijin Second Road, Shanghai, 200025, China.
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19
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Yu F, Yuan Y, Li D, Kou Y, Jiang B, Zhang P. The effect of lentivirus-mediated SIRT1 gene knockdown in the ATDC5 cell line via inhibition of the Wnt signaling pathway. Cell Signal 2018; 53:80-89. [PMID: 30266380 DOI: 10.1016/j.cellsig.2018.09.016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2018] [Revised: 09/18/2018] [Accepted: 09/21/2018] [Indexed: 12/22/2022]
Abstract
SIRT1 is a highly conserved type III acetyltransferase gene located on chromosome 10 in mammals that belong to the Sirtuins family. In order to explore the effects of the SIRT1 gene in the ATDC5 cell line, an RNAi SIRT1 target sequence was designed and synthesized, aimed to knockdown the expression of SIRT1 in ATDC5 by a lentivirus. Gene chip, qrt-PCR, and WES analyses were used to detect the expression of SIRT1 and changes to the Wnt signaling pathway, while detecting any changes in proliferation and differentiation factors. The results showed that the expressions of the SIRT1 gene, mRNA, and protein were lower after transfection of the RNAi SIRT1sequence into ATDC5 cells. The Wnt signaling pathway, especially the classical pathway, was inhibited by the knockdown of SIRT1. The cartilaginous proliferation and differentiation of ATDC5 cells were simultaneously inhibited, and apoptosis was accelerated. In summary, knocking down SIRT1 gene increased the degeneration of ATDC5 cells via inhibiting the Wnt signaling pathway. We also found some novel factors related to the Wnt signaling pathway after SIRT1 gene knockdown (BIRC3, IL1RAP, PPP3CA, PPP2R2A, PPP2R5E, GSN, PPP2R1B, etc), which might provide new clues in disease research related to chondrocyte degeneration.
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Affiliation(s)
- Fei Yu
- Department of Orthopedics and Trauma, Peking University People's Hospital, Beijing, China
| | - Yusong Yuan
- Department of Orthopedics and Trauma, Peking University People's Hospital, Beijing, China
| | - Dongdong Li
- Department of Orthopedics and Trauma, Peking University People's Hospital, Beijing, China
| | - Yuhui Kou
- Department of Orthopedics and Trauma, Peking University People's Hospital, Beijing, China
| | - Baoguo Jiang
- Department of Orthopedics and Trauma, Peking University People's Hospital, Beijing, China.
| | - Peixun Zhang
- Department of Orthopedics and Trauma, Peking University People's Hospital, Beijing, China.
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20
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Wang Y, Chen G, Yan J, Chen X, He F, Zhu C, Zhang J, Lin J, Pan G, Yu J, Pei M, Yang H, Liu T. Upregulation of SIRT1 by Kartogenin Enhances Antioxidant Functions and Promotes Osteogenesis in Human Mesenchymal Stem Cells. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2018; 2018:1368142. [PMID: 30116472 PMCID: PMC6079379 DOI: 10.1155/2018/1368142] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/17/2018] [Revised: 05/25/2018] [Accepted: 06/10/2018] [Indexed: 12/29/2022]
Abstract
Osteoarthritis is a chronic degenerative joint disease involving both articular cartilage and subchondral bone. Kartogenin (KGN) was recently identified to improve in vivo cartilage repair; however, its effect on bone formation is unknown. The aim of this study was to investigate the effect of KGN on antioxidant properties and osteogenic differentiation of bone marrow-derived mesenchymal stem cells (BM-MSCs). Human BM-MSCs were treated with KGN at concentrations ranging from 10-8 M to 10-6 M. Our results indicated that KGN improved cell proliferation and attenuated intracellular reactive oxygen species. The levels of antioxidant enzymes and osteogenic differentiation of BM-MSCs were enhanced by KGN in a dose-dependent manner. Furthermore, KGN-treated BM-MSCs showed upregulation of silent information regulator type 1 (SIRT1) and increased phosphorylation of adenosine 5'-monophosphate-activated protein kinase (AMPK), indicating that KGN activated the AMPK-SIRT1 signaling pathway in BM-MSCs. Inhibition of SIRT1 by nicotinamide reversed the antioxidant effect of KGN on BM-MSCs and suppressed osteogenic differentiation. In conclusion, our results demonstrated that KGN improved intracellular antioxidant properties and promoted osteogenic differentiation of BM-MSCs by activating the AMPK-SIRT1 signaling pathway. Thus, KGN may have the potential for not only articular cartilage repair but also the clinical application of MSCs in bone tissue engineering.
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Affiliation(s)
- Yifan Wang
- Department of Orthopaedics, The First Affiliated Hospital of Soochow University, Soochow University, Suzhou 215006, China
- Orthopaedic Institute, Medical College, Soochow University, Suzhou 215007, China
| | - Guangdong Chen
- Department of Orthopaedics, The First Affiliated Hospital of Soochow University, Soochow University, Suzhou 215006, China
- Orthopaedic Institute, Medical College, Soochow University, Suzhou 215007, China
| | - Jinku Yan
- Department of Orthopaedics, The First Affiliated Hospital of Soochow University, Soochow University, Suzhou 215006, China
- Orthopaedic Institute, Medical College, Soochow University, Suzhou 215007, China
| | - Xi Chen
- Department of Orthopaedics, The First Affiliated Hospital of Soochow University, Soochow University, Suzhou 215006, China
- Orthopaedic Institute, Medical College, Soochow University, Suzhou 215007, China
- School of Biology and Basic Medical Sciences, Medical College, Soochow University, Suzhou 215123, China
| | - Fan He
- Department of Orthopaedics, The First Affiliated Hospital of Soochow University, Soochow University, Suzhou 215006, China
- Orthopaedic Institute, Medical College, Soochow University, Suzhou 215007, China
| | - Caihong Zhu
- Orthopaedic Institute, Medical College, Soochow University, Suzhou 215007, China
| | - Junxin Zhang
- Department of Orthopaedics, The First Affiliated Hospital of Soochow University, Soochow University, Suzhou 215006, China
- Orthopaedic Institute, Medical College, Soochow University, Suzhou 215007, China
| | - Jun Lin
- Department of Orthopaedics, The First Affiliated Hospital of Soochow University, Soochow University, Suzhou 215006, China
| | - Guoqing Pan
- Institute for Advanced Materials, School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Jia Yu
- Department of Orthopaedics, The First Affiliated Hospital of Soochow University, Soochow University, Suzhou 215006, China
| | - Ming Pei
- Stem Cell and Tissue Engineering Laboratory, Department of Orthopaedics and Division of Exercise Physiology, West Virginia University, Morgantown, WV 26506, USA
| | - Huilin Yang
- Department of Orthopaedics, The First Affiliated Hospital of Soochow University, Soochow University, Suzhou 215006, China
- Orthopaedic Institute, Medical College, Soochow University, Suzhou 215007, China
| | - Tao Liu
- Department of Orthopaedics, The First Affiliated Hospital of Soochow University, Soochow University, Suzhou 215006, China
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Alterations of Subchondral Bone Progenitor Cells in Human Knee and Hip Osteoarthritis Lead to a Bone Sclerosis Phenotype. Int J Mol Sci 2018; 19:ijms19020475. [PMID: 29415458 PMCID: PMC5855697 DOI: 10.3390/ijms19020475] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2017] [Revised: 01/23/2018] [Accepted: 01/26/2018] [Indexed: 02/06/2023] Open
Abstract
Subchondral bone tissue plays a key role in the initiation and progression of human and experimental osteoarthritis and has received considerable interest as a treatment target. Elevated bone turnover and remodeling leads to subchondral bone sclerosis that is characterized by an increase in bone material that is less mineralized. The aim of this study was to investigate whether perturbations in subchondral bone-resident progenitor cells might play a role in aberrant bone formation in osteoarthritis. Colony formation assays indicated similar clonogenicity of progenitor cells from non-sclerotic and sclerotic subchondral trabecular bone tissues of osteoarthritic knee and hip joints compared with controls from iliac crest bone. However, the osteogenic potential at the clonal level was approximately two-fold higher in osteoarthritis than controls. An osteogenic differentiation assay indicated an efficient induction of alkaline phosphatase activity but blunted in vitro matrix mineralization irrespective of the presence of sclerosis. Micro-computed tomography and histology demonstrated the formation of de novo calcified tissues by osteoblast-like cells in an ectopic implantation model. The expression of bone sialoprotein, a marker for osteoblast maturation and mineralization, was significantly less in sclerotic progenitor cells. Perturbation of resident progenitor cell function is associated with subchondral bone sclerosis and may be a treatment target for osteoarthritis.
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22
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Yang G, Hamadeh IS, Katz J, Riva A, Lakatos P, Balla B, Kosa J, Vaszilko M, Pelliccioni GA, Davis N, Langaee TY, Moreb JS, Gong Y. SIRT1/HERC4 Locus Associated With Bisphosphonate-Induced Osteonecrosis of the Jaw: An Exome-Wide Association Analysis. J Bone Miner Res 2018; 33:91-98. [PMID: 28856724 DOI: 10.1002/jbmr.3285] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Revised: 08/20/2017] [Accepted: 08/28/2017] [Indexed: 12/30/2022]
Abstract
Osteonecrosis of the jaw (ONJ) is a rare, but serious drug side effect, mainly associated with the use of intravenous (iv) bisphosphonates (BPs). The purpose of this study was to identify genetic variants associated with ONJ in patients of European ancestry treated with iv BPs using whole-exome sequencing (WES). The WES phase 1 included 44 multiple myeloma patients (22 ONJ cases and 22 controls) and WES phase 2 included 17 ONJ patients with solid tumors. Multivariable logistic regression analysis was performed to estimate the odds ratios (ORs) and 95% confidence intervals (CI), adjusting for age, sex, and principal components for ancestry. Meta-analysis of WES phase 1 and 2 was performed to estimate the combined ORs. In silico analyses were then performed to identify expression quantitative loci (eQTL) single-nucleotide polymorphisms (SNPs) that are in high linkage disequilibrium (LD) with the top SNPs. The associations of the potentially functional SNPs were replicated and validated in an independent case-control study of 48 patients of European ancestry treated with iv BPs (19 ONJ cases and 29 controls). The top SNPs in the exome-wide association meta-analysis were two SNPs on chromosome 10: SIRT1 SNP rs7896005 and HERC4 SNP rs3758392 with identical OR of 0.07 (0.01-0.46; p = 3.83 × 10-5 ). In the in silico functional analyses, two promoter region SNPs (rs7894483 and rs3758391) were identified to be in high LD with the index SNPs and are eQTLs for SIRT1 gene in whole blood in the GTEx database. The ORs were 0.30 (0.10-0.88), 0.26 (0.12-0.55), and 0.26 (0.12-0.55) for the WES top SNP rs7896005 and two promoter SNPs rs7894483 and rs3758391, respectively, in the replication sample. In summary, we identified the SIRT1/HERC4 locus on chromosome 10 to be associated with iv BP-induced ONJ and two promoter SNPs that might be the potential genetic markers for this association. © 2017 The Authors.Journal of Bone and Mineral Research Published by Wiley Periodicals Inc.
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Affiliation(s)
- Guang Yang
- Department of Pharmacotherapy and Translational Research and Center for Pharmacogenomics, College of Pharmacy, University of Florida, Gainesville, FL, USA
| | - Issam S Hamadeh
- Department of Pharmacotherapy and Translational Research and Center for Pharmacogenomics, College of Pharmacy, University of Florida, Gainesville, FL, USA.,Cancer Pharmacology Department, Levine Cancer Institute, Charlotte, NC, USA
| | - Joseph Katz
- Department of Oral Medicine, College of Dentistry, University of Florida, Gainesville, FL, USA
| | - Alberto Riva
- Bioinformatics Core, Interdisciplinary Center for Biotechnology Research, University of Florida, Gainesville, FL, USA
| | - Peter Lakatos
- 1st Department of Medicine, Semmelweis University Medical School, Budapest, Hungary
| | | | - Janos Kosa
- 1st Department of Medicine, Semmelweis University Medical School, Budapest, Hungary.,PentaCore Laboratory, Budapest, Hungary
| | - Mihaly Vaszilko
- Department of Oro-Maxillofacial Surgery and Stomatology, Semmelweis University Dental School, Budapest, Hungary
| | - Gian Andrea Pelliccioni
- Department of Biomedical and Neuromotor Sciences, Section of Dentistry, Alma Mater Studiorum, Università di Bologna, Bologna, Italy
| | - Noa Davis
- Micromedic Technologies Ltd., Tel Aviv, Israel
| | - Taimour Y Langaee
- Department of Pharmacotherapy and Translational Research and Center for Pharmacogenomics, College of Pharmacy, University of Florida, Gainesville, FL, USA
| | - Jan S Moreb
- Department of Medicine, College of Medicine, University of Florida, Gainesville, FL, USA
| | - Yan Gong
- Department of Pharmacotherapy and Translational Research and Center for Pharmacogenomics, College of Pharmacy, University of Florida, Gainesville, FL, USA
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Platas J, Guillén MI, Pérez Del Caz MD, Gomar F, Castejón MA, Mirabet V, Alcaraz MJ. Paracrine effects of human adipose-derived mesenchymal stem cells in inflammatory stress-induced senescence features of osteoarthritic chondrocytes. Aging (Albany NY) 2017; 8:1703-17. [PMID: 27490266 PMCID: PMC5032691 DOI: 10.18632/aging.101007] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2016] [Accepted: 07/31/2016] [Indexed: 12/11/2022]
Abstract
Aging and exposure to stress would determine the chondrocyte phenotype in osteoarthritis (OA). In particular, chronic inflammation may contribute to stress-induced senescence of chondrocytes and cartilage degeneration during OA progression. Recent studies have shown that adipose-derived mesenchymal stem cells exert paracrine effects protecting against degenerative changes in chondrocytes. We have investigated whether the conditioned medium (CM) from adipose-derived mesenchymal stem cells may regulate senescence features induced by inflammatory stress in OA chondrocytes. Our results indicate that CM down-regulated senescence markers induced by interleukin-1β including senescence-associated β-galactosidase activity, accumulation of γH2AX foci and morphological changes with enhanced formation of actin stress fibers. Treatment of chondrocytes with CM also decreased the production of oxidative stress, the activation of mitogen-activated protein kinases, and the expression of caveolin-1 and p21. The effects of CM were related to the reduction in p53 acetylation which would be dependent on the enhancement of Sirtuin 1 expression. Therefore, CM may exert protective effects in degenerative joint conditions by countering the premature senescence of OA chondrocytes induced by inflammatory stress.
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Affiliation(s)
- Julia Platas
- Department of Pharmacology and IDM, University of Valencia, Burjasot, 46100 Valencia, Spain
| | - Maria Isabel Guillén
- Department of Pharmacology and IDM, University of Valencia, Burjasot, 46100 Valencia, Spain.,Department of Pharmacy, Cardenal Herrera-CEU University, Moncada, 46113 Valencia, Spain
| | | | - Francisco Gomar
- Department of Surgery, Faculty of Medicine, University of Valencia, 46010 Valencia, Spain
| | - Miguel Angel Castejón
- Department of Orthopaedic Surgery and Traumatology, De la Ribera University Hospital, Alzira, 46600 Valencia, Spain
| | - Vicente Mirabet
- Valencia Transfusion Center, Generalitat Valenciana, 46014 Valencia, Spain
| | - Maria José Alcaraz
- Department of Pharmacology and IDM, University of Valencia, Burjasot, 46100 Valencia, Spain
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Wnt Signaling-Related Osteokines and Transforming Growth Factors Before and After a Single Bout of Plyometric Exercise in Child and Adolescent Females. Pediatr Exerc Sci 2017; 29:504-512. [PMID: 28530511 DOI: 10.1123/pes.2017-0042] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
This study examined resting levels of catabolic and anabolic osteokines related to Wnt signaling and their responses to a single bout of plyometric exercise in child and adolescent females. Fourteen premenarcheal girls [10.5 (1.8) y old] and 12 postmenarcheal adolescent girls [15.0 (1.0) y old] performed a plyometric exercise trial. One resting and 3 postexercise blood samples (5 min, 1 h, and 24 h postexercise) were analyzed for sclerostin, dickkopf-1 (DKK-1), osteoprotegerin (OPG), receptor activator of nuclear factor kappa-β ligand (RANKL), and transforming growth factors (TGF-β1, TGF-β2, and TGF-β3). Premenarcheal girls had significantly higher resting sclerostin, TGF-β1, TGF-β2, and TGF-β3 than the postmenarcheal girls, with no significant time effect or group-by-time interaction. DKK-1 was higher in premenarcheal compared with postmenarcheal girls. There was an overall significant DKK-1 decrease from baseline to 1 h postexercise, which remained lower than baseline 24 h postexercise in both groups. There was neither a significant group effect nor group-by-time interaction in OPG, RANKL, and their ratio. RANKL decreased 5 min postexercise compared with baseline and remained significantly lower from baseline 24 h following the exercise. No changes were observed in OPG. OPG/RANKL ratio was significantly elevated compared with resting values 1 h postexercise. In young females, high-impact exercise induces an overall osteogenic effect through a transitory suppression of catabolic osteokines up to 24 h following exercise.
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Monteagudo S, Lories RJ. Cushioning the cartilage: a canonical Wnt restricting matter. Nat Rev Rheumatol 2017; 13:670-681. [PMID: 29021569 DOI: 10.1038/nrrheum.2017.171] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Wnt signalling pathways have key roles in joint development, homeostasis and disease, particularly in osteoarthritis. New data is starting to reveal the importance of tightly regulating canonical Wnt signalling pathway activation to maintain homeostasis and health in articular cartilage. In addition to the presence of different Wnt antagonists that limit pathway activation in articular cartilage, the reciprocal crosstalk between the canonical and non-canonical cascades and competitive antagonism between different Wnt ligands seem to be critical in restraining excessive Wnt pathway activation. Changes in transcriptional complex assembly upon Wnt pathway activation, epigenetic modulation of target gene transcription, in particular through histone modifications, and complex interactions between the Wnt signalling pathway and other signalling pathways, are also instrumental in adjusting Wnt signalling. In this Review, the cellular and molecular mechanisms involved in fine-tuning canonical Wnt signalling in the joint are updated, with a focus on the articular cartilage. The interventions for preventing or treating osteoarthritis are also discussed, which should aim to limit disease-associated excessive canonical Wnt activity to avoid joint damage.
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Affiliation(s)
- Silvia Monteagudo
- Laboratory for Tissue Homeostasis and Disease, Skeletal Biology and Engineering Research Centre, Department of Development and Regeneration, Katholieke Universiteit Leuven, Herestraat 49, B-3000 Leuven, Belgium
| | - Rik J Lories
- Laboratory for Tissue Homeostasis and Disease, Skeletal Biology and Engineering Research Centre, Department of Development and Regeneration, Katholieke Universiteit Leuven, Herestraat 49, B-3000 Leuven, Belgium.,Division of Rheumatology, University Hospitals Leuven, Herestraat 49, B-3000 Leuven, Belgium
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Hügle T, Geurts J. What drives osteoarthritis?-synovial versus subchondral bone pathology. Rheumatology (Oxford) 2017; 56:1461-1471. [PMID: 28003493 DOI: 10.1093/rheumatology/kew389] [Citation(s) in RCA: 88] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2016] [Indexed: 12/16/2022] Open
Abstract
Subchondral bone and the synovium play an important role in the initiation and progression of OA. MRI often permits an early detection of synovial hypertrophy and bone marrow lesions, both of which can precede cartilage damage. Newer imaging modalities including CT osteoabsorptiometry and hybrid SPECT-CT have underlined the importance of bone in OA pathogenesis. The subchondral bone in OA undergoes an uncoupled remodelling process, which is notably characterized by macrophage infiltration and osteoclast formation. Concomitant increased osteoblast activity leads to spatial remineralization and osteosclerosis in end-stage disease. A plethora of metabolic and mechanical factors can lead to synovitis in OA. Synovial tissue is highly vascularized and thus exposed to systemic influences such as hypercholesterolaemia or low grade inflammation. This review aims to describe the current understanding of synovitis and subchondral bone pathology and their connection in OA.
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Affiliation(s)
- Thomas Hügle
- Osteoarthritis Research Center Basel.,Department of Rheumatology
| | - Jeroen Geurts
- Osteoarthritis Research Center Basel.,Spine Surgery, University Hospital Basel, Basel, Switzerland
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27
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Liu S, Yang H, Hu B, Zhang M. Sirt1 regulates apoptosis and extracellular matrix degradation in resveratrol-treated osteoarthritis chondrocytes via the Wnt/β-catenin signaling pathways. Exp Ther Med 2017; 14:5057-5062. [PMID: 29201214 DOI: 10.3892/etm.2017.5165] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2016] [Accepted: 03/24/2017] [Indexed: 01/11/2023] Open
Abstract
Osteoarthritis (OA) has become a major public health problem with the increased aging population. Previous studies have demonstrated that resveratrol (RES) was able to increase the level of sirtuin 1 (Sirt1) in OA chondrocytes. However, further investigations are required to elucidate the precise molecular mechanism of RES and the potential link between Sirt1 and RES. Therefore, the present study used 30 clinical OA chondrocyte to examine chondrocyte viability, apoptosis rate and the mRNA and protein expression levels of Sirt1 and relevant genes implicated in apoptosis, extracellular matrix (ECM) degradation and Wnt/β-catenin signaling pathway. RES and nicotinamide were used as the stimulus and inhibitor, respectively. The results demonstrated that the apoptotic rate reduced as the cell population decreased from 13.83 to 6.55% in response to 10 µM RES. Expression levels of B-cell lymphoma 2 (Bcl-2) associated X protein (Bax), procaspase-3 and -9, matrix metalloproteinase 1 (MMP1), MMP3, MMP13, Wnt3a, Wnt5a, Wnt7a and β-catenin were significantly inhibited (P<0.01), whereas the level of Bcl-2 was significantly increased (P<0.01) in OA chondrocytes treated with 10 µM RES. These observations suggested that Sirt1 may regulate apoptosis and ECM degradation in RES-treated osteoarthritis chondrocytes via the Wnt/β-catenin signaling pathway.
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Affiliation(s)
- Shuan Liu
- Department of Orthopaedics, Tianyou Hospital Affiliated to Wuhan University of Science and Technology, Wuhan, Hubei 430064, P.R. China
| | - Hongping Yang
- Department of Orthopaedics, Tianyou Hospital Affiliated to Wuhan University of Science and Technology, Wuhan, Hubei 430064, P.R. China
| | - Bing Hu
- Department of Orthopaedics, Tianyou Hospital Affiliated to Wuhan University of Science and Technology, Wuhan, Hubei 430064, P.R. China
| | - Mingyong Zhang
- Department of Orthopaedics, Tianyou Hospital Affiliated to Wuhan University of Science and Technology, Wuhan, Hubei 430064, P.R. China
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Impact of resveratrol on bone repair in rats exposed to cigarette smoke inhalation: histomorphometric and bone-related gene expression analysis. Int J Oral Maxillofac Surg 2017; 47:541-548. [PMID: 28927744 DOI: 10.1016/j.ijom.2017.08.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Revised: 08/10/2017] [Accepted: 08/14/2017] [Indexed: 02/03/2023]
Abstract
This study investigated the effect of resveratrol on bone healing and its influence on the gene expression of bone-related markers in rats exposed to cigarette smoke. Two calvarial defects were created in each of 60 rats, which were assigned equally (n=20) to three groups: (1) resveratrol (10mg/kg)+smoke exposure (SMK+RESV); (2) placebo+smoke exposure (SMK+PLA); or (3) placebo+no smoke exposure (NS+PLA). Substances were administered daily for 30days following surgery. Smoke inhalation was started 7days before surgery and continued for 30days after surgery. One defect was processed for histomorphometric analysis and the other was used for mRNA quantification of bone-related gene expression by qPCR. The remaining defect was smaller in the SMK+RESV (2.27±0.61mm, P=0.0003) and NS+PLA (2.17±0.74mm, P=0.0005) groups than in the SMK+PLA group (3.12±0.47mm). Higher levels of Runx2 were observed in the NS+PLA group than in the smoke exposure groups (vs. SMK+PLA, P=0002; vs. SMK+RESV, P=0.052); levels of Lrp-5 were also higher in the no smoke exposure group (vs. SMK+RESV, P=0.009; vs. SMK+PLA, P=0.003). Resveratrol therapy decreased RANKL/OPG expression when compared to placebo (SMK+RESV vs. SMK+PLA, P=0.017). Dkk1 levels were decreased in the SMK+RESV group when compared to the SMK+PLA (P=0.006) and NS+PLA groups (P=0.005). In conclusion, resveratrol optimizes the repair of critical-sized bone defects, up-regulating the gene expression of important bone remodelling markers in rats exposed to cigarette smoke inhalation.
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Martineau X, Abed É, Martel-Pelletier J, Pelletier JP, Lajeunesse D. Alteration of Wnt5a expression and of the non-canonical Wnt/PCP and Wnt/PKC-Ca2+ pathways in human osteoarthritis osteoblasts. PLoS One 2017; 12:e0180711. [PMID: 28777797 PMCID: PMC5544184 DOI: 10.1371/journal.pone.0180711] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2016] [Accepted: 06/20/2017] [Indexed: 01/07/2023] Open
Abstract
Objective Clinical and in vitro studies suggest that subchondral bone sclerosis due to abnormal osteoblasts (Ob) is involved in the progression and/or onset of osteoarthritis (OA). Human Ob isolated from sclerotic subchondral OA bone tissue show an altered phenotype, a decreased canonical Wnt/β-catenin signaling pathway (cWnt), and a reduced mineralization in vitro. In addition to the cWnt pathway, at least two non-canonical signaling pathways, the Wnt/PKC and Wnt/PCP pathway have been described. However, there are no reports of either pathway in OA Ob. Here, we studied the two non-canonical pathways in OA Ob and if they influence their phenotype. Methods Human primary subchondral Ob were isolated from the subchondral bone plate of tibial plateaus of OA patients undergoing total knee arthroplasty, or of normal individuals at autopsy. The expression of genes involved in non-canonical Wnt signaling was evaluated by qRT-PCR and their protein production by Western blot analysis. Alkaline phosphatase activity and osteocalcin secretion (OC) were determined with substrate hydrolysis and EIA, respectively. Mineralization levels were evaluated with Alizarin Red Staining, Wnt/PKC and Wnt/PCP pathways by target gene expression and their respective activity using the NFAT and AP-1 luciferase reporter assays. Results OA Ob showed an altered phenotype as illustrated by an increased alkaline phosphatase activity and osteocalcin release compared to normal Ob. The expression of the non-canonical Wnt5a ligand was increased in OA Ob compared to normal. Whereas, the expression of LGR5 was significantly increased in OA Ob compared to normal Ob, the expression of LGR4 was similar. Wnt5a directly stimulated the expression and production of LGR5, contrasting, Wnt5a did not stimulate the expression of LGR4. Wnt5a also stimulated the phosphorylation of both JNK and PKC, as well as the activity of both NFAT and AP-1 transcription factors. The inhibition of Wnt5a expression partially corrects the abnormal mineralization, OC secretion and ALPase activity of OA Ob. Conclusion These data indicate that the alteration of Wnt5a, a non-canonical Wnt signaling activator, is implicated in the modified signalisation and phenotype observed in OA Ob.
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Affiliation(s)
- Xavier Martineau
- Unité de recherche en Arthrose, Centre de recherche du Centre hospitalier de l’Université de Montréal (CRCHUM), Montréal, Québec, Canada
| | - Élie Abed
- Unité de recherche en Arthrose, Centre de recherche du Centre hospitalier de l’Université de Montréal (CRCHUM), Montréal, Québec, Canada
| | - Johanne Martel-Pelletier
- Unité de recherche en Arthrose, Centre de recherche du Centre hospitalier de l’Université de Montréal (CRCHUM), Montréal, Québec, Canada
| | - Jean-Pierre Pelletier
- Unité de recherche en Arthrose, Centre de recherche du Centre hospitalier de l’Université de Montréal (CRCHUM), Montréal, Québec, Canada
| | - Daniel Lajeunesse
- Unité de recherche en Arthrose, Centre de recherche du Centre hospitalier de l’Université de Montréal (CRCHUM), Montréal, Québec, Canada
- * E-mail:
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30
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Abed É, Delalandre A, Lajeunesse D. Beneficial effect of resveratrol on phenotypic features and activity of osteoarthritic osteoblasts. Arthritis Res Ther 2017; 19:151. [PMID: 28666466 PMCID: PMC5493084 DOI: 10.1186/s13075-017-1365-2] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2016] [Accepted: 06/09/2017] [Indexed: 12/22/2022] Open
Abstract
Background Osteoarthritis (OA) is a complex disease, which affects multiple tissues, namely the subchondral bone, articular cartilage and synovial membrane. Alterations of the subchondral bone include an increased, yet under mineralized osteoid matrix, abnormal osteoblast cell phenotype including elevated alkaline phosphatase (ALP) activity, increased release of osteocalcin (OC) and transforming growth factor β-1 (TGF-β1). Previous studies have demonstrated an inhibition of the canonical Wnt signaling (cWnt) pathway in OA osteoblasts (Ob). As resveratrol (RSV) has been shown to upregulate the Wnt signaling pathway in different cell systems, we hypothesized that RSV could be beneficial for OA Ob. Method We prepared primary human Ob using the subchondral bone plate of tibial plateaus of OA patients undergoing total knee arthroplasty, or tibial plateaus of normal individuals at autopsy. Sirtuin 1 (Sirt1) expression in normal and OA subchondral bone tissue was evaluated by immunohistochemical analysis. Expression of genes was evaluated by qRT-PCR and protein production by western blot analysis. ALP activity and osteocalcin secretion were evaluated respectively with substrate hydrolysis and enzyme immunoassay. Mineralization levels were evaluated with alizarin red staining. Wnt/β-catenin signaling was evaluated by target gene expression using the TOPflash TCF/lef luciferase reporter assay and intracellular signaling using β-catenin levels in western blot analysis. Extracellular signal-regulated kinase (Erk)1/2 and the Smad1/5/8 pathways were evaluated by western blot analysis. Results Sirt1 expression and production were reduced in OA subchondral bone tissue compared to normal tissue. RSV upregulated Sirt1 and its activity, and reduced the expression of leptin. RSV increased Erk1/2 phosphorylation in OA Ob; however, it had no effect on Smad 1/5/8 phosphorylation. RSV had little effect on cell proliferation and only slightly affected the Bax/Bcl2 ratio. The expression of Runx2/Cbfa1 and peroxisome proliferator-activated receptor (PPAR)γ were not affected by increasing doses of RSV. The endogenous increased ALP activity and OC release observed in OA Ob compared to normal Ob were partly corrected only for ALP at high RSV levels but not for OC release. In contrast, RSV increased the mineralization of OA Ob. Moreover, whereas Wnt3a stimulates the Wnt/β-catenin pathway in these cells, RSV further increased the response to Wnt3a. Conclusion These data indicate that RSV promotes Sirt1 levels, inhibits the endogenous expression of leptin by OA osteoblasts and can promote the Wnt/β-catenin and Erk1/2 signaling pathways, which are altered in these cells.
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Affiliation(s)
- Élie Abed
- Unité de recherche en Arthrose, Centre de recherche du Centre hospitalier de l'Université de Montréal (CRCHUM), 900, rue Saint-Denis, Montréal, Québec, H2X 0A9, Canada
| | - Aline Delalandre
- Unité de recherche en Arthrose, Centre de recherche du Centre hospitalier de l'Université de Montréal (CRCHUM), 900, rue Saint-Denis, Montréal, Québec, H2X 0A9, Canada
| | - Daniel Lajeunesse
- Unité de recherche en Arthrose, Centre de recherche du Centre hospitalier de l'Université de Montréal (CRCHUM), 900, rue Saint-Denis, Montréal, Québec, H2X 0A9, Canada.
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Corrado A, Maruotti N, Cantatore FP. Osteoblast Role in Rheumatic Diseases. Int J Mol Sci 2017; 18:ijms18061272. [PMID: 28617323 PMCID: PMC5486094 DOI: 10.3390/ijms18061272] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2017] [Revised: 06/07/2017] [Accepted: 06/12/2017] [Indexed: 12/11/2022] Open
Abstract
Alterations in osteoblast growth, differentiation and activity play a role in the pathogenesis of several rheumatic diseases, such as rheumatoid arthritis, spondyloarthritides, osteoarthritis, and osteoporosis. In fact, in these rheumatic diseases, abnormal activity of Wnt signaling, receptor activator of nuclear factor-κB (RANK)-RANK ligand (RANKL)-osteoprotegerin (OPG) signaling, bone morphogenetic proteins (BMPs) pathway and other mechanisms have been described in osteoblasts. This review article is focused on current knowledge on the role of osteoblast dysregulation occurring in rheumatic diseases.
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Affiliation(s)
- Addolorata Corrado
- Rheumatology Clinic, Department of Medical and Surgical Sciences, University of Foggia Medical School, 71122 Foggia, Italy.
| | - Nicola Maruotti
- Rheumatology Clinic, Department of Medical and Surgical Sciences, University of Foggia Medical School, 71122 Foggia, Italy.
| | - Francesco Paolo Cantatore
- Rheumatology Clinic, Department of Medical and Surgical Sciences, University of Foggia Medical School, 71122 Foggia, Italy.
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Maruotti N, Corrado A, Cantatore FP. Osteoblast role in osteoarthritis pathogenesis. J Cell Physiol 2017; 232:2957-2963. [PMID: 28425564 PMCID: PMC5575507 DOI: 10.1002/jcp.25969] [Citation(s) in RCA: 90] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2017] [Accepted: 04/19/2017] [Indexed: 01/13/2023]
Abstract
Even if osteoarthritis pathogenesis is still poorly understood, numerous evidences suggest that osteoblasts dysregulation plays a key role in osteoarthritis pathogenesis. An abnormal expression of OPG and RANKL has been described in osteoarthritis osteoblasts, which is responsible for abnormal bone remodeling and decreased mineralization. Alterations in genes expression are involved in dysregulation of osteoblast function, bone remodeling, and mineralization, leading to osteoarthritis development. Moreover, osteoblasts produce numerous transcription factors, growth factors, and other proteic molecules which are involved in osteoarthritis pathogenesis.
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Affiliation(s)
- Nicola Maruotti
- Rheumatology Clinic, Department of Medical and Surgical Sciences, University of Foggia Medical School, Foggia, Italy
| | - Addolorata Corrado
- Rheumatology Clinic, Department of Medical and Surgical Sciences, University of Foggia Medical School, Foggia, Italy
| | - Francesco P Cantatore
- Rheumatology Clinic, Department of Medical and Surgical Sciences, University of Foggia Medical School, Foggia, Italy
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Cucchiarini M, de Girolamo L, Filardo G, Oliveira JM, Orth P, Pape D, Reboul P. Basic science of osteoarthritis. J Exp Orthop 2016; 3:22. [PMID: 27624438 PMCID: PMC5021646 DOI: 10.1186/s40634-016-0060-6] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/06/2016] [Accepted: 09/09/2016] [Indexed: 12/20/2022] Open
Abstract
Osteoarthritis (OA) is a prevalent, disabling disorder of the joints that affects a large population worldwide and for which there is no definitive cure. This review provides critical insights into the basic knowledge on OA that may lead to innovative end efficient new therapeutic regimens. While degradation of the articular cartilage is the hallmark of OA, with altered interactions between chondrocytes and compounds of the extracellular matrix, the subchondral bone has been also described as a key component of the disease, involving specific pathomechanisms controlling its initiation and progression. The identification of such events (and thus of possible targets for therapy) has been made possible by the availability of a number of animal models that aim at reproducing the human pathology, in particular large models of high tibial osteotomy (HTO). From a therapeutic point of view, mesenchymal stem cells (MSCs) represent a promising option for the treatment of OA and may be used concomitantly with functional substitutes integrating scaffolds and drugs/growth factors in tissue engineering setups. Altogether, these advances in the fundamental and experimental knowledge on OA may allow for the generation of improved, adapted therapeutic regimens to treat human OA.
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Affiliation(s)
- Magali Cucchiarini
- Center of Experimental Orthopaedics, Saarland University Medical Center and Saarland University, Kirrbergerstr. Bldg 37, D-66421, Homburg, Germany.
| | - Laura de Girolamo
- Orthopaedic Biotechnology Laboratory, Galeazzi Orthopaedic Institute, Milan, Italy
| | - Giuseppe Filardo
- Orthopaedic and Traumatologic I Clinic, Biomechanics Laboratory, Rizzoli Orthopaedic Institute, University of Bologna, Bologna, Italy
| | - J Miguel Oliveira
- 3B's Research Group - Biomaterials, Biodegradables and Biomimetics, Univ. Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Avepark - Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco GMR, Barco, Guimarães, Portugal
- ICVS/3B's - PT Government Associated Laboratory, Barco, Guimarães, Portugal
| | - Patrick Orth
- Center of Experimental Orthopaedics, Saarland University Medical Center and Saarland University, Kirrbergerstr. Bldg 37, D-66421, Homburg, Germany
- Department of Orthopaedic Surgery, Saarland University Medical Center and Saarland University, Homburg, Saar, Germany
| | - Dietrich Pape
- Department of Orthopaedic Surgery, Centre Hospitalier de Luxembourg, Luxembourg ville, Luxembourg
- Sports Medicine Research Laboratory, Public Research Centre for Health, Luxembourg, Centre Médical de la Fondation Norbert Metz, Luxembourg ville, Luxembourg
| | - Pascal Reboul
- UMR 7365 CNRS-Université de Lorraine, IMoPA, Biopôle de l'Université de Lorraine, Campus Biologie-Santé, Vandoeuvre-lès-Nancy, France
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Feng G, Zheng K, Song D, Xu K, Huang D, Zhang Y, Cao P, Shen S, Zhang J, Feng X, Zhang D. SIRT1 was involved in TNF-α-promoted osteogenic differentiation of human DPSCs through Wnt/β-catenin signal. In Vitro Cell Dev Biol Anim 2016; 52:1001-1011. [PMID: 27530621 DOI: 10.1007/s11626-016-0070-9] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2016] [Accepted: 06/27/2016] [Indexed: 02/06/2023]
Abstract
Dental pulp stem cells (DPSCs), as one type of mesenchymal stem cells (MSCs), have the capability of self-renewal and differentiating along the various directions, including osteogenic, chondrogenic, neurogenic, and adipogenic. We previously study and found that tumor necrosis factor-α (TNF-α) promoted osteogenic differentiation of human DPSCs via the Wnt/β-catenin signaling pathway in low concentration while inhibited that in high concentration. In the abovementioned process, we found that sirtuin-1 (SIRT1) had the same change compared with the characteristic protein of bone formation, such as bone morphogenetic protein 2 (BMP2), runt-related transcription factor 2 (Runx2), and collagen I (COL1). We asked whether SIRT1 could regulate osteogenesis of DPSCs. In inflammation microenvironment constructed by TNF-α, we tested the expression changing of SIRT1 and analyzed the function of SIRT1 on osteogenic differentiation of DPSCs. SIRT1 deacetylated β-catenin, and then promote its accumulation in the nucleus. Accumulated β-catenin can lead to transcription of osteogenic characteristic genes. Using the activator of SIRT1, resveratrol, could promote the above-mentioned process of osteogenic differentiation. SIRT1 could regulate osteogenesis of DPSCs through Wnt/β-catenin signal. SIRT1, as a regulator of differentiation of DPSCs, may be a new target for cell-based therapy in oral diseases and other regenerative medicine.
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Affiliation(s)
- Guijuan Feng
- Department of Stomatology, Affiliated Hospital of Nantong University, Nantong, 226001, China
| | - Ke Zheng
- Department of Stomatology, Affiliated Hospital of Nantong University, Nantong, 226001, China
| | - Donghui Song
- Department of Stomatology, Affiliated Hospital of Nantong University, Nantong, 226001, China
| | - Ke Xu
- Department of Stomatology, Affiliated Hospital of Nantong University, Nantong, 226001, China
| | - Dan Huang
- Department of Stomatology, Affiliated Hospital of Nantong University, Nantong, 226001, China
| | - Ye Zhang
- Department of Stomatology, Affiliated Hospital of Nantong University, Nantong, 226001, China
| | - Peipei Cao
- Department of Stomatology, Affiliated Hospital of Nantong University, Nantong, 226001, China
| | - Shuling Shen
- Department of Stomatology, Affiliated Hospital of Nantong University, Nantong, 226001, China
| | - Jinlong Zhang
- Department of Spine Surgery, The Second Affiliated Hospital of Nantong University, Nantong, 226001, China
| | - Xingmei Feng
- Department of Stomatology, Affiliated Hospital of Nantong University, Nantong, 226001, China.
| | - Dongmei Zhang
- Department of Pathogen Biology, Medical College, Nantong University, Nantong, 226001, China.
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Abstract
The involvement of the epigenome in complex diseases is becoming increasingly clear and more feasible to study due to new genomic and computational technologies. Moreover, therapies altering the activities of proteins that modify and interpret the epigenome are available to treat cancers and neurological disorders. Many additional uses have been proposed for these drugs based on promising preclinical results, including in arthritis models. Understanding the effects of epigenomic drugs on the skeleton is of interest because of its importance in maintaining overall health and fitness. In this review, we summarize ongoing advancements in how one class of epigenetic modifiers, histone deacetylases (Hdacs), controls normal cartilage development and homeostasis, as well as recent work aimed at understanding the alterations in the expression and activities of these enzymes in osteoarthritis (OA). We also review recent studies utilizing Hdac inhibitors and discuss the potential therapeutic benefits and limitations of these drugs for preventing cartilage destruction in OA.
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Oxidative stress, autophagy, epigenetic changes and regulation by miRNAs as potential therapeutic targets in osteoarthritis. Biochem Pharmacol 2016; 108:1-10. [DOI: 10.1016/j.bcp.2015.12.012] [Citation(s) in RCA: 91] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2015] [Accepted: 12/14/2015] [Indexed: 02/07/2023]
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Geurts J, Patel A, Hirschmann MT, Pagenstert GI, Müller-Gerbl M, Valderrabano V, Hügle T. Elevated marrow inflammatory cells and osteoclasts in subchondral osteosclerosis in human knee osteoarthritis. J Orthop Res 2016; 34:262-9. [PMID: 26250062 DOI: 10.1002/jor.23009] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/05/2015] [Accepted: 07/31/2015] [Indexed: 02/04/2023]
Abstract
Subchondral osteosclerosis, characterized by an increase of hypomineralized bone material, is a pathological hallmark of osteoarthritis. The cellular components in the subchondral marrow compartment that participate in this aberrant bone remodeling process remain to be elucidated. This study assessed the presence of marrow inflammatory cells and their relative abundance between nonsclerotic and sclerotic tissues in knee osteoarthritis. Bone samples from osteoarthritic knee tibial plateaus were stratified for histological analyses using computed tomography osteoabsorptiometry. Immunohistological analysis revealed the presence of CD20 (B-lymphocyte) and CD68 (macrophage), but not CD3 (T-lymphocyte) immunoreactive mononuclear cells in subchondral marrow tissues and their relative abundance was significantly increased in sclerotic compared with nonsclerotic bone samples. Multinucleated osteoclasts that stained positive for CD68 and tartrate-resistant acid phosphatase, predominantly associated with CD34-positive blood vessels and their abundance was strongly increased in sclerotic samples. Bone-specific alkaline phosphatase activity in outgrowth osteoblasts was induced by conditioned medium from nonsclerotic, but not sclerotic, bone pieces. These results suggest that an interaction between bone-resident cells and marrow inflammatory cells might play a role in aberrant bone remodeling leading to subchondral osteosclerosis. Elevated osteoclast activity in sclerotic bone suggests that bone formation and resorption activities are increased, yet uncoupled, in human knee osteoarthritis.
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Affiliation(s)
- Jeroen Geurts
- Osteoarthritis Research Center Basel, Orthopaedic Department, University Hospital Basel, Spitalstrasse 21, 4031 Basel, Switzerland
| | - Amit Patel
- Institute of Anatomy, University of Basel, Pestalozzistrasse 20, 4056 Basel, Switzerland
| | - Michael T Hirschmann
- Department of Orthopaedic Surgery and Traumatology, Kantonsspital Baselland-Bruderholz, 4104 Bruderholz, Switzerland
| | - Geert I Pagenstert
- Osteoarthritis Research Center Basel, Orthopaedic Department, University Hospital Basel, Spitalstrasse 21, 4031 Basel, Switzerland
| | - Magdalena Müller-Gerbl
- Institute of Anatomy, University of Basel, Pestalozzistrasse 20, 4056 Basel, Switzerland
| | - Victor Valderrabano
- Osteoarthritis Research Center Basel, Orthopaedic Department, University Hospital Basel, Spitalstrasse 21, 4031 Basel, Switzerland
| | - Thomas Hügle
- Osteoarthritis Research Center Basel, Orthopaedic Department, University Hospital Basel, Spitalstrasse 21, 4031 Basel, Switzerland
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Inflammation and intracellular metabolism: new targets in OA. Osteoarthritis Cartilage 2015; 23:1835-42. [PMID: 26521729 PMCID: PMC4668929 DOI: 10.1016/j.joca.2014.12.016] [Citation(s) in RCA: 73] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/12/2014] [Accepted: 12/17/2014] [Indexed: 02/02/2023]
Abstract
Articular cartilage degeneration is hallmark of osteoarthritis (OA). Low-grade chronic inflammation in the joint can promote OA progression. Emerging evidence indicates that bioenergy sensors couple metabolism with inflammation to switch physiological and clinical phenotypes. Changes in cellular bioenergy metabolism can reprogram inflammatory responses, and inflammation can disturb cellular energy balance and increase cell stress. AMP-activated protein kinase (AMPK) and sirtuin 1 (SIRT1) are two critical bioenergy sensors that regulate energy balance at both cellular and whole-body levels. Dysregulation of AMPK and SIRT1 has been implicated in diverse human diseases and aging. This review reveals recent findings on the role of AMPK and SIRT1 in joint tissue homeostasis and OA, with a focus on how AMPK and SIRT1 in articular chondrocytes modulate intracellular energy metabolism during stress responses (e.g., inflammatory responses) and how these changes dictate specific effector functions, and discusses translational significance of AMPK and SIRT1 as new therapeutic targets for OA.
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Bradley EW, Carpio LR, van Wijnen AJ, McGee-Lawrence ME, Westendorf JJ. Histone Deacetylases in Bone Development and Skeletal Disorders. Physiol Rev 2015; 95:1359-81. [PMID: 26378079 PMCID: PMC4600951 DOI: 10.1152/physrev.00004.2015] [Citation(s) in RCA: 104] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Histone deacetylases (Hdacs) are conserved enzymes that remove acetyl groups from lysine side chains in histones and other proteins. Eleven of the 18 Hdacs encoded by the human and mouse genomes depend on Zn(2+) for enzymatic activity, while the other 7, the sirtuins (Sirts), require NAD2(+). Collectively, Hdacs and Sirts regulate numerous cellular and mitochondrial processes including gene transcription, DNA repair, protein stability, cytoskeletal dynamics, and signaling pathways to affect both development and aging. Of clinical relevance, Hdacs inhibitors are United States Food and Drug Administration-approved cancer therapeutics and are candidate therapies for other common diseases including arthritis, diabetes, epilepsy, heart disease, HIV infection, neurodegeneration, and numerous aging-related disorders. Hdacs and Sirts influence skeletal development, maintenance of mineral density and bone strength by affecting intramembranous and endochondral ossification, as well as bone resorption. With few exceptions, inhibition of Hdac or Sirt activity though either loss-of-function mutations or prolonged chemical inhibition has negative and/or toxic effects on skeletal development and bone mineral density. Specifically, Hdac/Sirt suppression causes abnormalities in physiological development such as craniofacial dimorphisms, short stature, and bone fragility that are associated with several human syndromes or diseases. In contrast, activation of Sirts may protect the skeleton from aging and immobilization-related bone loss. This knowledge may prolong healthspan and prevent adverse events caused by epigenetic therapies that are entering the clinical realm at an unprecedented rate. In this review, we summarize the general properties of Hdacs/Sirts and the research that has revealed their essential functions in bone forming cells (e.g., osteoblasts and chondrocytes) and bone resorbing osteoclasts. Finally, we offer predictions on future research in this area and the utility of this knowledge for orthopedic applications and bone tissue engineering.
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Affiliation(s)
- Elizabeth W Bradley
- Mayo Clinic, Departments of Orthopedic Surgery and of Biochemistry and Molecular Biology, and Mayo Graduate School, Rochester, Minnesota; and Georgia Regents University, Department of Cellular Biology and Anatomy, Augusta, Georgia
| | - Lomeli R Carpio
- Mayo Clinic, Departments of Orthopedic Surgery and of Biochemistry and Molecular Biology, and Mayo Graduate School, Rochester, Minnesota; and Georgia Regents University, Department of Cellular Biology and Anatomy, Augusta, Georgia
| | - Andre J van Wijnen
- Mayo Clinic, Departments of Orthopedic Surgery and of Biochemistry and Molecular Biology, and Mayo Graduate School, Rochester, Minnesota; and Georgia Regents University, Department of Cellular Biology and Anatomy, Augusta, Georgia
| | - Meghan E McGee-Lawrence
- Mayo Clinic, Departments of Orthopedic Surgery and of Biochemistry and Molecular Biology, and Mayo Graduate School, Rochester, Minnesota; and Georgia Regents University, Department of Cellular Biology and Anatomy, Augusta, Georgia
| | - Jennifer J Westendorf
- Mayo Clinic, Departments of Orthopedic Surgery and of Biochemistry and Molecular Biology, and Mayo Graduate School, Rochester, Minnesota; and Georgia Regents University, Department of Cellular Biology and Anatomy, Augusta, Georgia
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Huang K, Bao JP, Jennings GJ, Wu LD. The disease-modifying effect of dehydroepiandrosterone in different stages of experimentally induced osteoarthritis: a histomorphometric study. BMC Musculoskelet Disord 2015; 16:178. [PMID: 26228537 PMCID: PMC4521359 DOI: 10.1186/s12891-015-0595-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/15/2014] [Accepted: 05/26/2015] [Indexed: 08/30/2023] Open
Abstract
Background Osteoarthritis (OA) is likely to become an increasing burden in the coming decades. Various agents have been developed to slow the progression of OA, and are collectively known as ‘disease-modifying drugs’, however, there is still little reliable evidence that such agents will be successful. Dehydroepiandrosterone (DHEA), a sex hormone precursor, has been recently proven as protective agent against OA, but the exact mechanism is still unkown. In the current study, the effects of weekly intra-articular injections of DHEA in preventing the progression of existing cartilage degeneration in an OA rabbit model were evaluated. The aim of the current study is to demonstrate the feature of its disease-modifying efficacy during OA progression. Methods Thirty male New Zealand white rabbits were used in this study. An anterior cruciate ligament transection (ACLT) model was used to create a progressive OA model in twenty rabbits. The animals were treated with DHEA or a placebo and were necropsied at 9 and 16 weeks. Ten rabbits receiving sham operations served as controls. The articular cartilage of the medial femoral condyle (MFC), lateral femoral condyle (LFC), medial tibial plateau (MTP) and lateral tibial plateau (LTP) was evaluated macroscopically and histologically. Results In the joints of the sham-operated rabbits, few histological changes were detected on the articular surfaces of the femoral condyles and tibial plateaus. ACLT obviously induced erosive changes on the cartilage surfaces. Compared to the placebo group, the macroscopic and Mankin score analyses demonstrated that the DHEA treatment markedly reduced the cartilage lesions and delayed cartilage degeneration in the four regions of the knee at 9 weeks after operation (macroscopic score: MFC P = 0.013; LFC P = 0.048; MTP P = 0.045; LTP P = 0.02, Mankin score: MFC P = 0.012; LFC P = 0.034; MTP P = 0.016; LTP P = 0.002). At 16 weeks, DHEA demonstrated chondroprotective effects on the lateral compartment of the knee compared to the placebo group, whereas the cartilage degeneration at the medial compartment of the knee did not differ among the groups (macroscopic score: LFC P = 0.046; LTP = 0.034, Mankin score: LFC P = 0.005; LTP P = 0.002). Conclusion The disease-modifying efficacy of DHEA aganist OA is time-specific and site-dependent. DHEA could be used as a disease-modifying strategy to limit the progression of OA, especially in the middle stage.
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Affiliation(s)
- Kai Huang
- Department of Orthopedics, The Second Affiliated Hospital of Zhejiang University, Zhejiang University, Hangzhou, China. .,Department of Orthopedics, Tongde Hospital of Zhejiang Province, Hangzhou, China.
| | - Jia-peng Bao
- Department of Orthopedics, The Second Affiliated Hospital of Zhejiang University, Zhejiang University, Hangzhou, China
| | | | - Li-dong Wu
- Department of Orthopedics, The Second Affiliated Hospital of Zhejiang University, Zhejiang University, Hangzhou, China.
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Tresguerres IF, Tamimi F, Eimar H, Barralet J, Torres J, Blanco L, Tresguerres JAF. Resveratrol as anti-aging therapy for age-related bone loss. Rejuvenation Res 2015; 17:439-45. [PMID: 24956408 DOI: 10.1089/rej.2014.1551] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
INTRODUCTION Previous studies have indicated that resveratrol, a natural phytoestrogen, can act as an anti-aging therapy to resist age-related changes of several body tissues. However, the anti-aging effects of resveratrol on bone have been poorly investigated in this natural aging population. Accordingly, this study was design to evaluate the effects of resveratrol on bone mass and biomechanical properties in old rat femora. METHODS Twenty 22-month-old male Wistar rats were divided into two randomly assigned groups (n=10). The first group was treated for 10 weeks with resveratrol (10 mg/kg per day) and the second group was left untreated (control). Rat femora were collected. Bone mass and bone microestructure were investigated by microcomputed tomography and histomorphometry. Biomechanical properties were determined by a three-point bending test. Plasma levels of CTX (carboxy-terminal telopeptide of type I collagen) and osteocalcin were also determined. Statistical analyses were performed by a Student two-tailed unpaired t-test. In all experiments, a value of p<0.05 was considered significant. RESULTS Microcomputed tomography analyses demonstrated that resveratrol-treated rats had significant higher bone volume, bone trabecular number, and cortical thickness and lower spacing between trabeculae in comparison to the control group. Histomorphometric analyses confirmed the increase of bone volume in resveratrol-treated rats compared to controls. Resveratrol-treated rats had significant higher bone flexural modulus, stiffness, and ultimate load compared to control group. Treatment was not associated with changes in plasma CTX or osteocalcin. CONCLUSION These findings demonstrate that resveratrol increases bone microstructure and bone mechanical properties in old male rats, suggesting that resveratrol might be used as anti-aging therapy to resist age-induced bone loss.
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Affiliation(s)
- Isabel F Tresguerres
- 1 Department of Medicine and Oral Surgery. School of Dentistry. Complutense University , Madrid, Spain
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Abed E, Bouvard B, Martineau X, Jouzeau JY, Reboul P, Lajeunesse D. Elevated hepatocyte growth factor levels in osteoarthritis osteoblasts contribute to their altered response to bone morphogenetic protein-2 and reduced mineralization capacity. Bone 2015; 75:111-9. [PMID: 25667190 DOI: 10.1016/j.bone.2015.02.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/24/2014] [Revised: 01/24/2015] [Accepted: 02/01/2015] [Indexed: 10/24/2022]
Abstract
PURPOSE Clinical and in vitro studies suggest that subchondral bone sclerosis due to abnormal osteoblasts is involved in the progression of osteoarthritis (OA). Human osteoblasts isolated from sclerotic subchondral OA bone tissue show an altered phenotype, a decreased canonical Wnt/ß-catenin pathway, and a reduced mineralization in vitro as well as in vivo. These alterations were linked with an abnormal response to BMP-2. OA osteoblasts release factors such as the hepatocyte growth factor (HGF) that contribute to cartilage loss whereas chondrocytes do not express HGF. HGF can stimulate BMP-2 expression in human osteoblasts, however, the role of HGF and its effect in OA osteoblasts remains unknown. Here we investigated whether elevated endogenous HGF levels in OA osteoblasts are responsible for their altered response to BMP-2. METHODS We prepared primary human subchondral osteoblasts using the sclerotic medial portion of the tibial plateaus of OA patients undergoing total knee arthroplasty, or from tibial plateaus of normal individuals obtained at autopsy. The expression of HGF was evaluated by qRT-PCR and the protein production by western blot analysis. HGF expression was reduced with siRNA technique whereas its activity was inhibited using the selective inhibitor PHA665752. Alkaline phosphatase activity (ALPase) and osteocalcin release were measured by substrate hydrolysis and EIA respectively. Canonical Wnt/β-catenin signaling (cWnt) was evaluated both by target gene expression using the TOPflash TCF/lef luciferase reporter assay and western blot analysis of β-catenin levels in response to Wnt3a stimulation. Mineralization in response to BMP-2 was evaluated by alizarin red staining. RESULTS The expression of HGF was increased in OA osteoblasts compared to normal osteoblasts and was maintained during their in vitro differentiation. OA osteoblasts released more HGF than normal osteoblasts as assessed by western blot analysis. HGF stimulated the expression of TGF-β1. BMP-2 dose-dependently (1 to 100 ng/ml) stimulated both ALPase and osteocalcin in normal osteoblasts whereas, it inhibited them in OA osteoblasts. HGF-siRNA treatments reversed this response in OA osteoblasts and restored the BMP-2 response. cWnt is reduced in OA osteoblasts compared to normal, and HGF-siRNA treatments increased cWnt in OA osteoblasts almost to normal. Smad1/5/8 phosphorylation in response to BMP-2, which is reduced in OA osteoblasts, was corrected when these cells were treated with PHA665752. The BMP-2-dependent mineralization of OA osteoblasts, which is also reduced compared to normal, was only partially restored by PHA665752 treatment whereas 28 days treatment with HGF reduced the mineralization of normal osteoblasts. CONCLUSION OA osteoblasts expressed more HGF than normal osteoblasts. Increased endogenous HGF production in OA osteoblasts stimulated the expression of TGF-β1 and reduced their response to BMP-2. Inhibiting HGF expression or HGF signaling restored the response to BMP-2 and Smad1/5/8 signaling. In addition, decreased HGF signaling partly corrects the abnormal mineralization of OA osteoblasts while increased HGF prevents the normal mineralization of normal osteoblasts. In summary, we hypothesize that sustained elevated HGF levels in OA osteoblasts drive their abnormal phenotype and is implicated in OA pathophysiology.
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Affiliation(s)
- E Abed
- Unité de recherche en Arthrose, Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montréal, Québec, Canada
| | - B Bouvard
- UMR7365 IMoPA, Université de Lorraine/CNRS, Vandœuvre lès Nancy, 54505, France; Service de Rhumatologie, Centre Hospitalier Universitaire (CHU), Angers 49933, France
| | - X Martineau
- Unité de recherche en Arthrose, Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montréal, Québec, Canada
| | - J-Y Jouzeau
- UMR7365 IMoPA, Université de Lorraine/CNRS, Vandœuvre lès Nancy, 54505, France; Service de Pharmacologie Clinique et de Toxicologie, Centre Hospitalier Universitaire (CHU), Nancy 54023, France
| | - P Reboul
- UMR7365 IMoPA, Université de Lorraine/CNRS, Vandœuvre lès Nancy, 54505, France
| | - D Lajeunesse
- Unité de recherche en Arthrose, Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), Montréal, Québec, Canada.
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Wendling D, Delattre E, Abbas W, Guillot X, Toussirot E, Herbein G. Sirt-1 activity in PBMC from patients with spondyloarthritis. Joint Bone Spine 2015; 82:210-1. [DOI: 10.1016/j.jbspin.2014.10.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2014] [Accepted: 10/01/2014] [Indexed: 10/24/2022]
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O'Gorman DB, Gan BS. The cellular microenvironment: a new target in the search for cellular and molecular treatment for Dupuytren’s disease. Expert Opin Orphan Drugs 2014. [DOI: 10.1517/21678707.2014.978856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Mabey T, Honsawek S, Tanavalee A, Wilairatana V, Yuktanandana P, Saetan N, Zhan D. Plasma and synovial fluid sclerostin are inversely associated with radiographic severity of knee osteoarthritis. Clin Biochem 2014; 47:547-51. [PMID: 24680913 DOI: 10.1016/j.clinbiochem.2014.03.011] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2014] [Revised: 03/02/2014] [Accepted: 03/10/2014] [Indexed: 01/05/2023]
Abstract
OBJECTIVE The purpose of this study was to analyze sclerostin in plasma and synovial fluid of knee osteoarthritis (OA) patients and to investigate the association between sclerostin levels and radiographic severity. DESIGN AND METHODS A total of 190 subjects (95 knee OA patients and 95 healthy controls) were recruited in the present study. Sclerostin levels in plasma and synovial fluid were assessed using an enzyme-linked immunosorbent assay. OA grading was performed using the Kellgren-Lawrence classification. RESULTS Plasma sclerostin levels were significantly lower in OA patients than in healthy controls (P=0.004). Additionally, sclerostin levels in plasma were significantly higher with respect to paired synovial fluid (P<0.001). Moreover, sclerostin levels in plasma and synovial fluid demonstrated a significant inverse correlation with the radiographic severity of knee OA (r=-0.464, P<0.001 and r=-0.592, P<0.001, respectively). Subsequent analysis revealed that there was a positive correlation between plasma and synovial sclerostin levels (r=0.657, P<0.001). CONCLUSIONS Sclerostin was significantly lower in OA plasma samples when compared with healthy controls. Plasma and synovial fluid sclerostin levels were inversely associated with the radiographic severity of knee OA. Therefore, sclerostin may be utilized as a biochemical marker for reflecting disease severity in primary knee OA.
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Affiliation(s)
- Thomas Mabey
- Department of Biochemistry, Faculty of Medicine, Chulalongkorn University, King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok 10330, Thailand
| | - Sittisak Honsawek
- Department of Biochemistry, Faculty of Medicine, Chulalongkorn University, King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok 10330, Thailand; Department of Orthopaedics, Faculty of Medicine, Chulalongkorn University, King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok 10330, Thailand.
| | - Aree Tanavalee
- Department of Orthopaedics, Faculty of Medicine, Chulalongkorn University, King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok 10330, Thailand
| | - Vajara Wilairatana
- Department of Orthopaedics, Faculty of Medicine, Chulalongkorn University, King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok 10330, Thailand
| | - Pongsak Yuktanandana
- Department of Orthopaedics, Faculty of Medicine, Chulalongkorn University, King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok 10330, Thailand
| | - Natthaphon Saetan
- Department of Biochemistry, Faculty of Medicine, Chulalongkorn University, King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok 10330, Thailand
| | - Dong Zhan
- Department of Biochemistry, Faculty of Medicine, Chulalongkorn University, King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok 10330, Thailand
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