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Bujda M, Klíma K. Enhancing Guided Bone Regeneration with a Novel Carp Collagen Scaffold: Principles and Applications. J Funct Biomater 2024; 15:150. [PMID: 38921524 PMCID: PMC11205119 DOI: 10.3390/jfb15060150] [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: 05/07/2024] [Revised: 05/21/2024] [Accepted: 05/29/2024] [Indexed: 06/27/2024] Open
Abstract
Bone defects resulting from trauma, surgery, and congenital, infectious, or oncological diseases are a functional and aesthetic burden for patients. Bone regeneration is a demanding procedure, involving a spectrum of molecular processes and requiring the use of various scaffolds and substances, often yielding an unsatisfactory result. Recently, the new collagen sponge and its structural derivatives manufactured from European carp (Cyprinus carpio) were introduced and patented. Due to its fish origin, the novel scaffold poses no risk of allergic reactions or transfer of zoonoses and additionally shows superior biocompatibility, mechanical stability, adjustable degradation rate, and porosity. In this review, we focus on the basic principles of bone regeneration and describe the characteristics of an "ideal" bone scaffold focusing on guided bone regeneration. Moreover, we suggest several possible applications of this novel material in bone regeneration processes, thus opening new horizons for further research.
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Affiliation(s)
- Michele Bujda
- Department of Oral and Maxillofacial Surgery, 1st Faculty of Medicine and General University Hospital in Prague, Charles University, 12108 Prague, Czech Republic
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Luo P, Zhang Y, Huang M, Luo G, Ma Y, Wang X. Microdroplets Encapsulated with NFATc1-siRNA and Exosomes-Derived from MSCs Onto 3D Porous PLA Scaffold for Regulating Osteoclastogenesis and Promoting Osteogenesis. Int J Nanomedicine 2024; 19:3423-3440. [PMID: 38617800 PMCID: PMC11015852 DOI: 10.2147/ijn.s443413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Accepted: 04/01/2024] [Indexed: 04/16/2024] Open
Abstract
Introduction Osteoporotic-related fractures remains a significant public health concern, thus imposing substantial burdens on our society. Excessive activation of osteoclastic activity is one of the main contributing factors for osteoporosis-related fractures. While polylactic acid (PLA) is frequently employed as a biodegradable scaffold in tissue engineering, it lacks sufficient biological activity. Microdroplets (MDs) have been explored as an ultrasound-responsive drug delivery method, and mesenchymal stem cell (MSC)-derived exosomes have shown therapeutic effects in diverse preclinical investigations. Thus, this study aimed to develop a novel bioactive hybrid PLA scaffold by integrating MDs-NFATc1-silencing siRNA to target osteoclast formation and MSCs-exosomes (MSC-Exo) to influence osteogenic differentiation (MDs-NFATc1/PLA-Exo). Methods Human bone marrow-derived mesenchymal stromal cells (hBMSCs) were used for exosome isolation. Transmission electron microscopy (TEM) and confocal laser scanning microscopy were used for exosome and MDs morphological characterization, respectively. The MDs-NFATc1/PLA-Exo scaffold was fabricated through poly(dopamine) and fibrin gel coating. Biocompatibility was assessed using RAW 264.7 macrophages and hBMSCs. Osteoclast formations were examined via TRAP staining. Osteogenic differentiation of hBMSCs and cytokine expression modulation were also investigated. Results MSC-Exo exhibited a cup-shaped structure and effective internalization into cells, while MDs displayed a spherical morphology with a well-defined core-shell structure. Following ultrasound stimulation, the internalization study demonstrated efficient delivery of bioactive MDs into recipient cells. Biocompatibility studies indicated no cytotoxicity of MDs-NFATc1/PLA-Exo scaffolds in RAW 264.7 macrophages and hBMSCs. Both MDs-NFATc1/PLA and MDs-NFATc1/PLA-Exo treatments significantly reduced osteoclast differentiation and formation. In addition, our results further indicated MDs-NFATc1/PLA-Exo scaffold significantly enhanced osteogenic differentiation of hBMSCs and modulated cytokine expression. Discussion These findings suggest that the bioactive MDs-NFATc1/PLA-Exo scaffold holds promise as an innovative structure for bone tissue regeneration. By specifically targeting osteoclast formation and promoting osteogenic differentiation, this hybrid scaffold may address key challenges in osteoporosis-related fractures.
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Affiliation(s)
- Peng Luo
- Department of Orthopaedic Surgery, Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou, 563003, People’s Republic of China
| | - Yi Zhang
- Department of Hygiene Toxicology, School of Public Health, Zunyi Medical University, Zunyi, Guizhou, 563000, People’s Republic of China
- Key Laboratory of Maternal & Child Health and Exposure Science of Guizhou Higher Education Institutes, Zunyi Medical University, Zunyi, Guizhou, 563000, People’s Republic of China
| | - Maodi Huang
- Department of Orthopaedic Surgery, Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou, 563003, People’s Republic of China
| | - Guochen Luo
- Department of Orthopaedic Surgery, Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou, 563003, People’s Republic of China
| | - Yaping Ma
- Department of Orthopaedic Surgery, Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou, 563003, People’s Republic of China
- Guizhou Provincial Key Laboratory of Medicinal Biotechnology in Colleges and Universities, Zunyi Medical University, Zunyi, Guizhou, 563000, People’s Republic of China
| | - Xin Wang
- Department of Orthopaedic Surgery, Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou, 563003, People’s Republic of China
- Guizhou Provincial Key Laboratory of Medicinal Biotechnology in Colleges and Universities, Zunyi Medical University, Zunyi, Guizhou, 563000, People’s Republic of China
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Zhang X, Yang Z, Xu Q, Xu C, Shi W, Pang R, Zhang K, Liang X, Li H, Li Z, Zhang H. Dexamethasone Induced Osteocyte Apoptosis in Steroid-Induced Femoral Head Osteonecrosis through ROS-Mediated Oxidative Stress. Orthop Surg 2024; 16:733-744. [PMID: 38384174 PMCID: PMC10925516 DOI: 10.1111/os.14010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Revised: 01/16/2024] [Accepted: 01/18/2024] [Indexed: 02/23/2024] Open
Abstract
OBJECTIVE Glucocorticoid (GC) overuse is strongly associated with steroid-induced osteonecrosis of the femoral head (SINFH). However, the underlying mechanism of SINFH remains unclear. This study aims to investigate the effect of dexamethasone (Dex)-induced oxidative stress on osteocyte apoptosis and the underlying mechanisms. METHODS Ten patients with SINFH and 10 patients with developmental dysplasia of the hips (DDH) were enrolled in our study. Sixty rats were randomly assigned to the Control, Dex, Dex + N-Acetyl-L-cysteine (NAC), Dex + Dibenziodolium chloride (DPI), NAC, and DPI groups. Magnetic resonance imaging (MRI) was used to examine edema in the femoral head of rats. Histopathological staining was performed to assess osteonecrosis. Immunofluorescence staining with TUNEL and 8-OHdG was conducted to evaluate osteocyte apoptosis and oxidative damage. Immunohistochemical staining was carried out to detect the expression of NOX1, NOX2, and NOX4. Viability and apoptosis of MLO-Y4 cells were measured using the CCK-8 assay and TUNEL staining. 8-OHdG staining was conducted to detect oxidative stress. 2',7'-Dichlorodihydrofluorescein diacetate (DCFH-DA) staining was performed to measure reactive oxygen species (ROS). The expression of NOX1, NOX2, and NOX4 in MLO-Y4 cells was analyzed by Western blotting. Multiple comparisons were performed using one-way analysis of variance (ANOVA). RESULTS In patients and the rat model, hematoxylin-eosin (HE) staining revealed a significantly higher rate of empty lacunae in the SINFH group than in the DDH group. Immunofluorescence staining indicated a significant increase in TUNEL-positive cells and 8-OHdG-positive cells in the SINFH group compared to the DDH group. Immunohistochemical staining demonstrated a significant increase in the expression of NOX1, NOX2, and NOX4 proteins in SINFH patients compared to DDH patients. Moreover, immunohistochemical staining showed a significant increase in the proportion of NOX2-positive cells compared to the Control group in the femoral head of rats. In vitro, Dex significantly inhibited the viability of osteocyte cells and induced apoptosis. After Dex treatment, the intracellular ROS level increased. However, Dex treatment did not alter the expression of NOX proteins in vitro. Additionally, NAC and DPI inhibited the generation of intracellular ROS and partially alleviated osteocyte apoptosis in vivo and in vitro. CONCLUSION This study demonstrates that GC promotes apoptosis of osteocyte cells through ROS-induced oxidative stress. Furthermore, we found that the increased expression of NOXs induced by GC serves as an important source of ROS generation.
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Affiliation(s)
- Xinglong Zhang
- Department of OrthopaedicsGeneral Hospital of Tianjin Medical UniversityTianjinChina
- Department of OrthopaedicsTianjin Nankai HospitalTianjinChina
| | - Zhenhuan Yang
- Department of OrthopaedicsGeneral Hospital of Tianjin Medical UniversityTianjinChina
| | - Qian Xu
- School of Integrative MedicineTianjin University of Traditional Chinese MedicineTianjinChina
| | - Chunlei Xu
- Department of OrthopaedicsGeneral Hospital of Tianjin Medical UniversityTianjinChina
| | - Wei Shi
- Department of OrthopaedicsGeneral Hospital of Tianjin Medical UniversityTianjinChina
| | - Ran Pang
- Department of OrthopaedicsGeneral Hospital of Tianjin Medical UniversityTianjinChina
- Department of OrthopaedicsTianjin Nankai HospitalTianjinChina
| | - Kai Zhang
- Department of OrthopaedicsGeneral Hospital of Tianjin Medical UniversityTianjinChina
| | - Xinyu Liang
- Department of OrthopaedicsGeneral Hospital of Tianjin Medical UniversityTianjinChina
| | - Hui Li
- Department of OrthopaedicsGeneral Hospital of Tianjin Medical UniversityTianjinChina
| | - Zhijun Li
- Department of OrthopaedicsGeneral Hospital of Tianjin Medical UniversityTianjinChina
| | - Huafeng Zhang
- Department of OrthopaedicsGeneral Hospital of Tianjin Medical UniversityTianjinChina
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Yang M, Zhu L. Osteoimmunology: The Crosstalk between T Cells, B Cells, and Osteoclasts in Rheumatoid Arthritis. Int J Mol Sci 2024; 25:2688. [PMID: 38473934 DOI: 10.3390/ijms25052688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2024] [Revised: 02/22/2024] [Accepted: 02/24/2024] [Indexed: 03/14/2024] Open
Abstract
Rheumatoid arthritis (RA) is an ongoing inflammatory condition that affects the joints and can lead to severe damage to cartilage and bones, resulting in significant disability. This condition occurs when the immune system becomes overactive, causing osteoclasts, cells responsible for breaking down bone, to become more active than necessary, leading to bone breakdown. RA disrupts the equilibrium between osteoclasts and osteoblasts, resulting in serious complications such as localized bone erosion, weakened bones surrounding the joints, and even widespread osteoporosis. Antibodies against the receptor activator of nuclear factor-κB ligand (RANKL), a crucial stimulator of osteoclast differentiation, have shown great effectiveness both in laboratory settings and actual patient cases. Researchers are increasingly focusing on osteoclasts as significant contributors to bone erosion in RA. Given that RA involves an overactive immune system, T cells and B cells play a pivotal role by intensifying the immune response. The imbalance between Th17 cells and Treg cells, premature aging of T cells, and excessive production of antibodies by B cells not only exacerbate inflammation but also accelerate bone destruction. Understanding the connection between the immune system and osteoclasts is crucial for comprehending the impact of RA on bone health. By delving into the immune mechanisms that lead to joint damage, exploring the interactions between the immune system and osteoclasts, and investigating new biomarkers for RA, we can significantly improve early diagnosis, treatment, and prognosis of this condition.
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Affiliation(s)
- Mei Yang
- Department of Pharmacology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences and School of Basic Medicine, Peking Union Medical College, Beijing 100005, China
- Medical Epigenetics Research Center, Chinese Academy of Medical Sciences, Beijing 100005, China
| | - Lei Zhu
- Department of Pharmacology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences and School of Basic Medicine, Peking Union Medical College, Beijing 100005, China
- Medical Epigenetics Research Center, Chinese Academy of Medical Sciences, Beijing 100005, China
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Amiri MA, Farshidfar N, Miron RJ, Dziedzic A, Hamedani S, Daneshi S, Tayebi L. The Potential Therapeutic Effects of Platelet-Derived Biomaterials on Osteoporosis: A Comprehensive Review of Current Evidence. Int J Biomater 2023; 2023:9980349. [PMID: 38098766 PMCID: PMC10721351 DOI: 10.1155/2023/9980349] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Revised: 11/09/2023] [Accepted: 11/24/2023] [Indexed: 12/17/2023] Open
Abstract
Osteoporosis is a chronic multifactorial condition that affects the skeletal system, leading to the deterioration of bone microstructure and an increased risk of bone fracture. Platelet-derived biomaterials (PDBs), so-called platelet concentrates, such as platelet-rich plasma (PRP) and platelet-rich fibrin (PRF), have shown potential for improving bone healing by addressing microstructural impairment. While the administration of platelet concentrates has yielded positive results in bone regeneration, the optimal method for its administration in the clinical setting is still debatable. This comprehensive review aims to explore the systemic and local use of PRP/PRF for treating various bone defects and acute fractures in patients with osteoporosis. Furthermore, combining PRP/PRF with stem cells or osteoinductive and osteoconductive biomaterials has shown promise in restoring bone microstructural properties, treating bony defects, and improving implant osseointegration in osteoporotic animal models. Here, reviewing the results of in vitro and in vivo studies, this comprehensive evaluation provides a detailed mechanism for how platelet concentrates may support the healing process of osteoporotic bone fractures.
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Affiliation(s)
- Mohammad Amin Amiri
- Student Research Committee, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Nima Farshidfar
- Stem Cells Technology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Richard J. Miron
- Department of Periodontology, University of Bern, Bern, Switzerland
| | - Arkadiusz Dziedzic
- Department of Conservative Dentistry with Endodontics, Medical University of Silesia, Katowice, Poland
| | - Shahram Hamedani
- Oral and Dental Disease Research Center, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Sajad Daneshi
- Stem Cells Technology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Lobat Tayebi
- Marquette University School of Dentistry, Milwaukee, WI 53233, USA
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Shibing X, Xugang L, Siqi Z, Yifan C, Jun C, Changsheng W, Simeng W, Bangcheng Y. Osteogenic properties of bioactive titanium in inflammatory environment. Dent Mater 2023; 39:929-937. [PMID: 37640634 DOI: 10.1016/j.dental.2023.08.180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Accepted: 08/23/2023] [Indexed: 08/31/2023]
Abstract
OBJECTIVES It is very important that the effects of surface modified titanium on osteogenic differentiation of bone marrow mesenchymal stem cells in the process of bone regeneration. The bio-function of modified titanium could be affected by the inflammatory micro-environment. The aim of this study was to investigate the effects of modified titanium on osteogenic differentiation in the inflammatory conditions and the osteogenic properties of the modified titanium dental implant in vivo. METHODS The medical pure titanium metals (PT-Ti) subjected to Anodic Oxidation (AO-Ti), Sand Blasting/acid etching (SLA-Ti) and Plasma-sprayed HA coating (HA coating-Ti) were used for regulating the osteogenic properties of MSCs in the normal and inflammatory conditions. RESULTS The amount of the MSCs in the inflammatory environment were more similar to that in the non-inflammatory environment after cultured on AO-Ti samples for 7D. However, the proliferation of the MSCs was obviously inhibited on the other groups in the inflammatory condition. The morphology of MSC cells on the modified titanium surface was affected in the inflammatory conditions and the AO-Ti was more conducive to maintain the skeletal morphology of MSCs. The results of osteogenic related proteins expression showed that the amount of BMP-2 on AO-Ti group was the highest in the inflammatory conditions, and followed the order of AO-Ti > HA coating-Ti > SLA-Ti > PT-Ti. What's more, the AO-Ti samples were more beneficial to promote the expression of osteogenic genes ALP, OCN, COL-I and Runx2 in the inflammatory conditions. The results of osteogenic properties in vivo showed that the gingival depth of the AO-Ti group was smaller than that on the other groups. Some new bone could be observed around the AO-Ti implant at two weeks. The bone binding rates on AO-Ti group was the highest of 81.3% after implanted for one year. SIGNIFICANCE The AO-Ti was beneficial to osteogenic differentiation than other modified titanium metals in inflammatory condition. The anodic oxidation is an effective surface modification method on titanium to promote bone regeneration.
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Affiliation(s)
- Xiong Shibing
- Engineering Research Center in Biomaterials, Sichuan University, Chengdu 610064, China; National Engineering Research Center for Biomaterials, Chengdu 610064, China; Sichuan Guojia Biomaterials Co., Ltd, Chengdu 610064, China; College of Biomedical Engineering, Sichuan University, Chengdu 610064, China
| | - Lu Xugang
- Engineering Research Center in Biomaterials, Sichuan University, Chengdu 610064, China; National Engineering Research Center for Biomaterials, Chengdu 610064, China; Sichuan Guojia Biomaterials Co., Ltd, Chengdu 610064, China; College of Biomedical Engineering, Sichuan University, Chengdu 610064, China
| | - Zhang Siqi
- Engineering Research Center in Biomaterials, Sichuan University, Chengdu 610064, China; National Engineering Research Center for Biomaterials, Chengdu 610064, China; Sichuan Guojia Biomaterials Co., Ltd, Chengdu 610064, China; College of Biomedical Engineering, Sichuan University, Chengdu 610064, China
| | - Cui Yifan
- Engineering Research Center in Biomaterials, Sichuan University, Chengdu 610064, China; National Engineering Research Center for Biomaterials, Chengdu 610064, China; Sichuan Guojia Biomaterials Co., Ltd, Chengdu 610064, China; College of Biomedical Engineering, Sichuan University, Chengdu 610064, China
| | - Chen Jun
- Engineering Research Center in Biomaterials, Sichuan University, Chengdu 610064, China; National Engineering Research Center for Biomaterials, Chengdu 610064, China; Sichuan Guojia Biomaterials Co., Ltd, Chengdu 610064, China; College of Biomedical Engineering, Sichuan University, Chengdu 610064, China
| | - Wei Changsheng
- Engineering Research Center in Biomaterials, Sichuan University, Chengdu 610064, China; National Engineering Research Center for Biomaterials, Chengdu 610064, China; Sichuan Guojia Biomaterials Co., Ltd, Chengdu 610064, China; College of Biomedical Engineering, Sichuan University, Chengdu 610064, China
| | - Wang Simeng
- Engineering Research Center in Biomaterials, Sichuan University, Chengdu 610064, China; National Engineering Research Center for Biomaterials, Chengdu 610064, China; Sichuan Guojia Biomaterials Co., Ltd, Chengdu 610064, China; College of Biomedical Engineering, Sichuan University, Chengdu 610064, China
| | - Yang Bangcheng
- Engineering Research Center in Biomaterials, Sichuan University, Chengdu 610064, China; National Engineering Research Center for Biomaterials, Chengdu 610064, China; Sichuan Guojia Biomaterials Co., Ltd, Chengdu 610064, China; College of Biomedical Engineering, Sichuan University, Chengdu 610064, China.
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Oliveira JA, de Oliveira Alves R, Nascimento IM, Hidalgo MAR, Scarel-Caminaga RM, Cristina Pigossi S. Pro- and anti-inflammatory cytokines and osteoclastogenesis-related factors in peri-implant diseases: systematic review and meta-analysis. BMC Oral Health 2023; 23:420. [PMID: 37355561 PMCID: PMC10290807 DOI: 10.1186/s12903-023-03072-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2023] [Accepted: 05/23/2023] [Indexed: 06/26/2023] Open
Abstract
BACKGROUND Pro- and anti-inflammatory cytokines are acknowledged, during inflammatory bone destruction, as key regulators of osteoclast and osteoblast differentiation and activity. However, evidence regarding the exact role of pro- and anti-inflammatory cytokines and osteoclastogenesis-related factors in peri-implant diseases is unclear. We aimed to execute a systematic review and meta-analysis about the pro- and anti-inflammatory cytokines and osteoclastogenesis-related factors levels in peri-implant diseases. METHODS The focused question was elaborated to summarize the levels of pro-and anti-inflammatory cytokines and osteoclastogenesis-related factors in tissue samples (mRNA) and biofluids (protein levels) of patients with/without peri-implant diseases. Electronic searches of the PubMed, Cochrane Controlled Trials Registry, Web of Science, EMBASE, Scopus and Google scholar databases were conducted for publications up to March 2023. Meta-analysis evaluating the mediator´s levels (protein levels by ELISA) in peri-implant crevicular fluid (PICF) were made. The effect size was estimated and reported as the mean difference. The 95% confidence interval was estimated for each mediator, and the pooled effect was determined significant if two-sided p-values < 0.05 were obtained. RESULTS Twenty-two publications were included in the systematic review (qualitative analysis), with nine of these subjected to meta-analyses (quantitative analysis). In the qualitative analysis, higher pro-inflammatory cytokines [Interleukin (IL)-1β, IL-6] and pro-osteoclastogenic mediator [Receptor Activator of Nuclear Factor-Kappa B ligand (RANKL)] levels were observed in PICF of individuals with peri-implant diseases in comparison to healthy individuals. Higher RANKL/osteoprotegerin (OPG) ratios were observed in PICF from individuals with peri-implant diseases in comparison to healthy individuals. Meta-analysis showed higher RANKL levels in diseased groups compared to controls. CONCLUSIONS The results showed that the levels of IL-1β, IL-6, IL-10, and RANKL/OPG are not balanced in peri-implant disease, suggesting that these mediators are involved in the host osteo-immunoinflammatory response related to peri-implantitis.
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Affiliation(s)
- Jovânia Alves Oliveira
- School of Dentistry, Alfenas Federal University (Unifal-MG), Alfenas, Minas Gerais Brazil
| | - Roberta de Oliveira Alves
- Department of Periodontology, School of Dentistry, School of Dentistry, Federal University of Uberlândia - UFU, Umuarama Campus, Bloco UMU4L, Pará Avenue, Uberlândia, Minas Gerais 1720, 38405-320 Brazil
| | | | - Marco Antonio Rimachi Hidalgo
- Department of Morphology, Genetics, Orthodontics and Pediatric Dentistry, School of Dentistry at Araraquara, (FOAr/UNESP), UNESP- São Paulo State University, Araraquara, São Paulo, Brazil
| | - Raquel Mantuaneli Scarel-Caminaga
- Department of Morphology, Genetics, Orthodontics and Pediatric Dentistry, School of Dentistry at Araraquara, (FOAr/UNESP), UNESP- São Paulo State University, Araraquara, São Paulo, Brazil
| | - Suzane Cristina Pigossi
- Department of Periodontology, School of Dentistry, School of Dentistry, Federal University of Uberlândia - UFU, Umuarama Campus, Bloco UMU4L, Pará Avenue, Uberlândia, Minas Gerais 1720, 38405-320 Brazil
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Fang J, Zhang X, Chen X, Wang Z, Zheng S, Cheng Y, Liu S, Hao L. The role of insulin-like growth factor-1 in bone remodeling: A review. Int J Biol Macromol 2023; 238:124125. [PMID: 36948334 DOI: 10.1016/j.ijbiomac.2023.124125] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2023] [Revised: 03/15/2023] [Accepted: 03/17/2023] [Indexed: 03/24/2023]
Abstract
Insulin-like growth factor (IGF)-1 is a polypeptide hormone with vital biological functions in bone cells. The abnormal expression of IGF-1 has a serious effect on bone growth, particularly bone remodeling. Evidence from animal models and human disease suggested that both IGF-1 deficiency and excess cause changes in bone remodeling equilibrium, resulting in profound alterations in bone mass and development. Here, we first introduced the functions and mechanisms of the members of IGFs in bone. Subsequently, the critical role of IGF-1 in the process of bone remodeling were emphasized from the aspects of bone resorption and bone formation respectively. This review explains the mechanism of IGF-1 in maintaining bone mass and bone homeostasis to a certain extent and provides a theoretical basis for further research.
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Affiliation(s)
- Jiayuan Fang
- College of Animal Science, Jilin University, Changchun 130062, China
| | - Xunming Zhang
- College of Animal Science, Jilin University, Changchun 130062, China
| | - Xi Chen
- College of Animal Science, Jilin University, Changchun 130062, China
| | - Zhaoguo Wang
- College of Animal Science, Jilin University, Changchun 130062, China
| | - Shuo Zheng
- College of Animal Science, Jilin University, Changchun 130062, China
| | - Yunyun Cheng
- College of Public Health, Jilin University, Changchun 130061, China
| | - Songcai Liu
- College of Animal Science, Jilin University, Changchun 130062, China
| | - Linlin Hao
- College of Animal Science, Jilin University, Changchun 130062, China.
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Georgiou AC, Twisk JWR, Crielaard W, Ouwerling P, Schoneveld AH, van der Waal SV. The influence of apical periodontitis on circulatory inflammatory mediators in peripheral blood: A prospective case-control study. Int Endod J 2023; 56:130-145. [PMID: 36284462 PMCID: PMC10098678 DOI: 10.1111/iej.13854] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2022] [Revised: 10/16/2022] [Accepted: 10/17/2022] [Indexed: 01/17/2023]
Abstract
AIM To explore the influence of apical periodontitis (AP) on inflammatory markers in blood of otherwise healthy individuals and to depict the inflammatory profile of the healing after dental extraction. METHODOLOGY This is a prospective case-control intervention study, during which, individuals with a diagnosis of AP of one affected tooth were included, along with a control group matched for age and gender. A broad panel of blood inflammatory mediators was examined longitudinally in all subjects during six visits. In the case of the AP subjects, the tooth with AP was extracted at the third visit. Results were analysed by linear regression analyses and linear mixed-model analyses. RESULTS A total of 53 subjects were included in the study, 27 with AP and 26 without. Fifteen females and 12 males were included in the AP group, and 14 females and 12 males in the control group. At baseline, granulocyte colony-stimulating factor (p < .001), interleukin (IL)-1β (p = .03) and IL-4 (p = .01) were significantly lower in AP subjects than in controls. Comparison of the differences between baseline and the last visit, i.e. 3 months after the tooth extraction, showed a significant reduction in IL-10 (p = .03) and IL-12p70 (p = .01). CONCLUSIONS The immunologic profile of chronic AP in one tooth and its healing profile reveals a systemic low-grade inflammation through compensatory immunosuppression. A larger lesion or multiple lesions could disrupt the balance that the system is trying to maintain, resulting in loss of homeostasis.
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Affiliation(s)
- Athina Christina Georgiou
- Department of Preventive Dentistry, Academic Centre for Dentistry Amsterdam, University of Amsterdam and Vrije Universiteit, Amsterdam, The Netherlands
| | - Jos W R Twisk
- Department of Epidemiology and Data Science, Amsterdam UMC, Location VU University Medical Center, Amsterdam Public Health Research Institute, Amsterdam, The Netherlands
| | - Wim Crielaard
- Department of Preventive Dentistry, Academic Centre for Dentistry Amsterdam, University of Amsterdam and Vrije Universiteit, Amsterdam, The Netherlands
| | - Peter Ouwerling
- Tandheelkundig Centrum Molenvliet, Alphen aan den Rijn, The Netherlands
| | - Arjan H Schoneveld
- Division LAB, Department Central Diagnostic Laboratory, UMC Utrecht, Utrecht, The Netherlands
| | - Suzette Veronica van der Waal
- Department of Preventive Dentistry, Academic Centre for Dentistry Amsterdam, University of Amsterdam and Vrije Universiteit, Amsterdam, The Netherlands.,Department of Endodontics, Academic Centre for Dentistry Amsterdam, University of Amsterdam and Vrije Universiteit, Amsterdam, The Netherlands
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Chen Y, Liu Y, Zhang Y, Yu J, Tang L. Galectin-1 deletion in mice causes bone loss via impaired osteogenic differentiation potential of BMSCs. FASEB J 2022; 36:e22516. [PMID: 36006656 DOI: 10.1096/fj.202200397r] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Revised: 07/11/2022] [Accepted: 08/15/2022] [Indexed: 11/11/2022]
Abstract
Bone formation is dependent on the osteoblasts which are differentiated from bone marrow stromal cells (BMSCs). In addition to potent proliferation, self-renewal, and pluripotent differentiation, BMSCs have been extensively studied due to their low immunogenicity and immunomodulatory effects. Recently, galectin-1 (Gal-1) has been proposed as a potent mediator of immunomodulatory properties of BMSCs. Previous study demonstrated that Gal-1 showed age-related decline in mice serum and serum Gal-1 was positively associated with bone mass in mice. The current study makes attempts to elucidate the functional role of Gal-1 in skeletal system by investigating the regulation of Gal-1 expression during BMSCs osteogenic differentiation and the molecular mechanisms underlying the effects of Gal-1 on BMSCs osteogenic differentiation. In Gal-1 null (-/-) mice, bone loss was observed due to bone formation attenuation. In in vitro experiments, Gal-1 supported the osteogenic differentiation of BMSCs by binding to CD146 to activate Lrp5 expression and Wnt/β-catenin signaling pathway. Meanwhile, there was positive feedback regulation via Wnt/β-catenin signaling to maintain Gal-1 high-level expression during osteogenic differentiation of BMSCs. More importantly, Gal-1 down-regulation in BMSCs and attenuation of osteogenic differentiation potential of BMSCs were observed in aged mice compared with young mice. Gal-1 over-expression could enhance osteogenic differentiation potential of aged BMSCs. Our study will benefit not only for deeper insights into the functional role of Gal-1 but also for finding new targets to modulate BMSCs osteogenic differentiation.
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Affiliation(s)
- Yu Chen
- Department of Orthopedics, Huashan Hospital, Fudan University, Shanghai, People's Republic of China
| | - Yanbin Liu
- Department of Orthopedics, Shanghai General Hospital, Shanghai Jiaotong University, Shanghai, People's Republic of China
| | - Yangyang Zhang
- Department of Orthopedic Surgery, Tongren Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
| | - Jiangming Yu
- Department of Orthopedic Surgery, Tongren Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
| | - Liang Tang
- Department of Orthopedic Surgery, Tongren Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
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11
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Ahmad SS, Ahmed F, Ali R, Ghoneim MM, Alshehri S, Najmi AK, Ahmad S, Ahmad MZ, Ahmad J, Khan MA. Immunology of osteoporosis: relevance of inflammatory targets for the development of novel interventions. Immunotherapy 2022; 14:815-831. [PMID: 35765988 DOI: 10.2217/imt-2021-0282] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Osteoporosis is recognized as low bone mass and deteriorated bone microarchitecture. It is the leading cause of fractures and consequent morbidity globally. The established pathophysiological evidence favors the endocrine factors for osteoporosis and the role of the immune system on the skeletal system has been recently identified. Due to the common developmental niche bone and immune system interactions have led to the emergence of osteoimmunology. Immune dysregulation can initiate inflammatory conditions that adversely affect bone integrity. The role of immune cells, such as T-lymphocytes subsets (Th17), cannot be neglected in the pathogenesis of osteoporosis. Local inflammation within the bone from any cause attracts immune cells that participate in the activation of osteoclasts. This work summarizes the present knowledge of osteoimmunology in reference to osteoporosis and identifies novel targets for immunotherapy of osteoporosis.
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Affiliation(s)
- Syed Sufian Ahmad
- Department of Pharmacology, School of Pharmaceutical Education & Research, Jamia Hamdard, Hamdard Nagar, New Delhi, 110062, India
| | - Faraha Ahmed
- Department of Pharmacology, School of Pharmaceutical Education & Research, Jamia Hamdard, Hamdard Nagar, New Delhi, 110062, India
| | - Ruhi Ali
- Delhi Institute of Pharmaceutical Education & Research (DIPSAR), DPSRU, New Delhi, 110017, India
| | - Mohammed M Ghoneim
- Department of Pharmacy Practice, College of Pharmacy, AlMaarefa University, AdDiriyah, 13713, Saudi Arabia
| | - Sultan Alshehri
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Abul Kalam Najmi
- Department of Pharmacology, School of Pharmaceutical Education & Research, Jamia Hamdard, Hamdard Nagar, New Delhi, 110062, India
| | - Sayeed Ahmad
- Department of Pharmacognosy & Phytochemistry, Bioactive Natural Product Laboratory, School of Pharmaceutical Education & Research, Jamia Hamdard, Hamdard Nagar, New Delhi, 110062, India
| | - Mohammad Zaki Ahmad
- Department of Pharmaceutics, College of Pharmacy, Najran University, Najran, 11001, Saudi Arabia
| | - Javed Ahmad
- Department of Pharmaceutics, College of Pharmacy, Najran University, Najran, 11001, Saudi Arabia
| | - Mohammad Ahmed Khan
- Department of Pharmacology, School of Pharmaceutical Education & Research, Jamia Hamdard, Hamdard Nagar, New Delhi, 110062, India
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12
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Preliminary Report: Osteoarthritis and Rheumatoid Arthritis Synovial Fluid Increased Osteoclastogenesis In Vitro by Monocyte Differentiation Pathway Regulating Cytokines. Mediators Inflamm 2022; 2022:2606916. [PMID: 35693109 PMCID: PMC9175097 DOI: 10.1155/2022/2606916] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Revised: 04/04/2022] [Accepted: 04/22/2022] [Indexed: 11/18/2022] Open
Abstract
Background. Rheumatoid arthritis (RA) and osteoarthritis (OA) are common joint diseases associated with changes in local, as well as systemic bone structure and osteoclast function. We investigated how the different soluble inflammatory stimuli in these diseases can affect osteoclastogenesis and bone resorption in vitro. Methods. Human peripheral blood mononuclear cell-derived osteoclasts were cultured on bone slices with serum from treatment-naïve RA patients and healthy controls and with synovial fluid samples acquired from RA and OA patients. The concentrations of 29 different cytokines and related proteins, including RANKL and OPG, were analyzed in the fluids tested. Results. RA serum and synovial fluid increased both osteoclastogenesis and bone resorption. Osteoclastogenesis and activity increased more in the cultures containing OA than RA synovial fluid. The osteoclasts cultured in different culture media exhibited different phenotypes, especially the cells cultured with OA synovial fluid were generally larger and had more nuclei. A general increase in proinflammatory cytokines in RA synovial fluid and serum was found. Surprisingly, OA synovial fluid showed lower levels of osteoclastogenesis inhibiting cytokines, such as IL-4 and IL-10, than RA synovial fluid, which at least partly explains more pronounced osteoclastogenesis. No significant difference was found in RANKL or OPG levels. Conclusion. The proinflammatory stimulus in OA and RA drives the monocyte differentiation towards inflammatory osteoclastogenesis and altered osteoclast phenotype.
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13
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Miller RM, Freitas ED, Heishman AD, Peak KM, Buchanan SR, Bemben DA, Bemben MG. Associations of serum IL-6 with muscle, bone, and adipose tissue in women. Cytokine 2022; 151:155787. [DOI: 10.1016/j.cyto.2021.155787] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 11/09/2021] [Accepted: 12/06/2021] [Indexed: 11/17/2022]
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14
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Kwack KH, Maglaras V, Thiyagarajan R, Zhang L, Kirkwood KL. Myeloid-derived suppressor cells in obesity-associated periodontal disease: A conceptual model. Periodontol 2000 2021; 87:268-275. [PMID: 34463977 DOI: 10.1111/prd.12384] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Periodontitis is a common chronic inflammatory disease characterized by destruction of the supporting structures of the teeth. Severe periodontitis is highly prevalent-affecting 10%-15% of adults-and carries several negative comorbidities, thus reducing quality of life. Although a clear relationship exists between severity of obesity and incidence of periodontal disease, the biologic mechanisms that support this link are incompletely understood. In this conceptual appraisal, a new "two-hit" model is presented to explain obesity-exacerbated periodontal bone loss. This proposed model recognizes a previously unappreciated aspect of myeloid-derived suppressor cell population expansion, differentiation, and activity that can participate directly in periodontal bone loss, providing new mechanistic and translational perspectives.
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Affiliation(s)
- Kyu Hwan Kwack
- Department of Oral Biology, University at Buffalo, Buffalo, New York, USA
| | - Victoria Maglaras
- Department of Oral Biology, University at Buffalo, Buffalo, New York, USA
| | - Ramkumar Thiyagarajan
- Division of Geriatrics and Palliative Medicine, University at Buffalo, Buffalo, New York, USA.,Research Service, Western New York Veterans Affairs Healthcare Service, Buffalo, New York, USA
| | - Lixia Zhang
- Department of Oral Biology, University at Buffalo, Buffalo, New York, USA
| | - Keith L Kirkwood
- Department of Oral Biology, University at Buffalo, Buffalo, New York, USA.,Department of Head and Neck/Plastic and Reconstructive Surgery, Buffalo, New York, USA
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15
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Role of Exosomal MicroRNAs and Their Crosstalk with Oxidative Stress in the Pathogenesis of Osteoporosis. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2021; 2021:6301433. [PMID: 34336108 PMCID: PMC8315851 DOI: 10.1155/2021/6301433] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/23/2021] [Revised: 06/24/2021] [Accepted: 07/02/2021] [Indexed: 12/12/2022]
Abstract
Osteoporosis (OP) is an aging-related disease involving permanent bone tissue atrophy. Most patients with OP show high levels of oxidative stress (OS), which destroys the microstructure of bone tissue and promotes disease progression. Exosomes (exos) help in the delivery of microRNAs (miRNAs) and allow intercellular communication. In OP, exosomal miRNAs modulate several physiological processes, including the OS response. In the present review, we aim to describe how exosomal miRNAs and OS contribute to OP. We first summarize the relationship of OS with OP and then detail the features of exos along with the functions of exo-related miRNAs. Further, we explore the interplay between exosomal miRNAs and OS in OP and summarize the functional role of exos in OP. Finally, we identify the advantages of exo-based miRNA delivery in treatment strategies for OP. Our review seeks to improve the current understanding of the mechanism underlying OP pathogenesis and lay the foundation for the development of novel theranostic approaches for OP.
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16
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Activation of 4-1BB signaling in bone marrow stromal cells triggers bone loss via the p-38 MAPK-DKK1 axis in aged mice. Exp Mol Med 2021; 53:654-666. [PMID: 33859350 PMCID: PMC8102492 DOI: 10.1038/s12276-021-00605-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 02/05/2021] [Accepted: 02/18/2021] [Indexed: 02/02/2023] Open
Abstract
Senile osteoporosis can cause bone fragility and increased fracture risks and has been one of the most prevalent and severe diseases affecting the elderly population. Bone formation depends on the proper osteogenic differentiation of bone marrow stromal cells (BMSCs) in the bone marrow microenvironment, which is generated by the functional relationship among different cell types in the bone marrow. With aging, bone marrow provides signals that repress osteogenesis. Finding the signals that oppose BMSC osteogenic differentiation from the bone marrow microenvironment and identifying the abnormal changes in BMSCs with aging are key to elucidating the mechanisms of senile osteoporosis. In a pilot experiment, we found that 4-1BBL and 4-1BB were more abundant in bone marrow from aged (18-month-old) mice than young (6-month-old) mice. Meanwhile, significant bone loss was observed in aged mice compared with young mice. However, very little data have been generated regarding whether high-level 4-1BB/4-1BBL in bone marrow was associated with bone loss in aged mice. In the current study, we found upregulation of 4-1BB in the BMSCs of aged mice, which resulted in the attenuation of the osteogenic differentiation potential of BMSCs from aged mice via the p38 MAPK-Dkk1 pathway. More importantly, bone loss of aged mice could be rescued through the blockade of 4-1BB signaling in vivo. Our study will benefit not only our understanding of the pathogenesis of age-related trabecular bone loss but also the search for new targets to treat senile osteoporosis.
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17
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Immunological Aspects of Dental Implant Rejection. BIOMED RESEARCH INTERNATIONAL 2020; 2020:7279509. [PMID: 33376734 PMCID: PMC7744195 DOI: 10.1155/2020/7279509] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/22/2020] [Revised: 10/29/2020] [Accepted: 11/24/2020] [Indexed: 12/12/2022]
Abstract
Nowadays, dental implants are a prominent therapeutic approach among dentists for replacing missing teeth. Failure in dental implants is a severe challenge recently. The factors which lead to dental implant failure are known. These factors can be categorized into different groups. In this article, we discussed the immunological aspects of implant failure as one of these groups. Cytokines and immune cells have extensive and various functions in peri-implantitis. The equilibrium between pro and anti-inflammatory cytokines and cells, which involve in this orchestra, has a crucial role in implant prognosis. In conclusion, immune cells, especially macrophages and dendritic cells, almost increased in the patients with implant failure. Also, proinflammatory cytokines were proposed as diagnostic factors according to their higher levels in dental implant rejection.
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18
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Kirkwood KL, Zhang L, Thiyagarajan R, Seldeen KL, Troen BR. Myeloid-Derived Suppressor Cells at the Intersection of Inflammaging and Bone Fragility. Immunol Invest 2019; 47:844-854. [PMID: 31282803 DOI: 10.1080/08820139.2018.1552360] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Age-related alteration of the immune system with aging, or immunosenescence, plays a major role in several age-associated conditions, including loss of bone integrity. Studies over the past several years have clearly established the immune system is chronically activated with advanced aging, termed inflammaging, and is characterized by elevated levels of proinflammatory cytokines in response to physiological or environmental cues that essentially result in an arrested immune system that maintains a low-level state of activation. This age-associated inflammation impacts several biological systems including the innate immune system, where aging results in a skewing of the hematopoiesis toward the myeloid lineage, including the expansion of myeloid-derived suppressor cells (MDSCs). This heterogeneous population of myeloid cells classically displays immunosuppressive capacity but they also have the ability to directly differentiate into osteoclasts. This review explores the possibility of inflammaging to be involved in reduction of bone microarchitecture and loss of bone mass/strength through the expansion of MDSCs and the osteoclastogenic capacity and activity.
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Affiliation(s)
- Keith L Kirkwood
- a Department of Oral Biology , University at Buffalo , Buffalo , New York , USA.,b Department of Oral Oncology , Roswell Park Comprehensive Cancer Center , Buffalo , New York , USA
| | - Lixia Zhang
- a Department of Oral Biology , University at Buffalo , Buffalo , New York , USA
| | - Ramkumar Thiyagarajan
- c Division of Geriatrics and Palliative Medicine , University at Buffalo, Research Service, Western New York Veterans Affairs Healthcare Service , Buffalo , New York , USA
| | - Kenneth L Seldeen
- c Division of Geriatrics and Palliative Medicine , University at Buffalo, Research Service, Western New York Veterans Affairs Healthcare Service , Buffalo , New York , USA
| | - Bruce R Troen
- c Division of Geriatrics and Palliative Medicine , University at Buffalo, Research Service, Western New York Veterans Affairs Healthcare Service , Buffalo , New York , USA
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19
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Farhad SZ, Rezazadeh F, Mohammadi M. Interleukin - 17 and Interleukin-10 as Inflammatory and Prevention Biomarkers in Periimplant Diseases. Int J Prev Med 2019; 10:137. [PMID: 31516678 PMCID: PMC6710915 DOI: 10.4103/ijpvm.ijpvm_27_19] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Accepted: 03/06/2019] [Indexed: 12/24/2022] Open
Abstract
Background Periimplant diseases are inflammatory diseases. Thus, the level of preinflammatory cytokines which has important role in the inflammation processes can consider as biomchemical markers for early diagnosis and prevention of periimplant diseases. The aim of this study was to determine and compare the level of interleukin (IL)-17 and IL-10 in patients with periimplant mucositis and periimplantitis. Methods This case--control study was conducted on 51 patients with implants which were loaded at least 1 year previously, 17 patients with periimplant mucositis, 17 patients with periimplantitis, and 17 individuals with healthy implants. After clinical examination, gingival crevicular fluid sampling was carried out by paper point number 25 for 4 min and the mean value of IL-17, IL-10 in samples was measured using enzyme linked immunosorbent assay (ELISA), least square differences (LSD) reader in laboratory. The data was analyzed using statistical software SPSS 22. Quantitative analysis was done using One-way analysis of variance (ANOVA) test and LSD past test. Results The results of analysis showed that there was a significant difference in the mean value of IL-17 and IL-10 between the three study groups (P < 0.001). Individuals with healthy implants showed a significant lower level of IL-17 than patients with periimplantitis (P = 0.001) and for patients with periimplantitis, the level of IL-17 was significantly lower than that of patients with periimplant mucositis (P < 0.001) and IL-10 level was significantly lower in mucositis than periimplantitis (P < 0.001). Conclusions The level of IL-17 and IL-10 increased in patients with periimplant compared to individuals with healthy periimplant tissues and the results showed that the highest concentrations of IL-17 and IL-10 were observed in patients with periimplant mucositis and periimplantitis, respectively.
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Affiliation(s)
- Shirin Zahra Farhad
- Department of Periodontics, School of Dentistry, Isfahan (Khorasgan) Branch, Isalmic Azad University, Isfahan, Iran
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20
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Kong L, Smith W, Hao D. Overview of RAW264.7 for osteoclastogensis study: Phenotype and stimuli. J Cell Mol Med 2019; 23:3077-3087. [PMID: 30892789 PMCID: PMC6484317 DOI: 10.1111/jcmm.14277] [Citation(s) in RCA: 89] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Revised: 02/13/2019] [Accepted: 02/16/2019] [Indexed: 12/25/2022] Open
Abstract
Bone homeostasis is preserved by the balance of maintaining between the activity of osteogenesis and osteoclastogenesis. However, investigations for the osteoclastogenesis were hampered by considerable difficulties associated with isolating and culturing osteoclast in vivo. As the alternative, stimuli‐induced osteoclasts formation from RAW264.7 cells (RAW‐OCs) have gain its importance for extensively osteoclastogenic study of bone diseases, such as rheumatoid arthritis, osteoporosis, osteolysis and periodontitis. However, considering the RAW‐OCs have not yet been well‐characterized and RAW264.7 cells are polymorphic because of a diverse phenotype of the individual cells comprising this cell linage, and different fate associated with various stimuli contributions. Thus, in present study, we provide an overview for current knowledge of the phenotype of RAW264.7 cells, as well as the current understanding of the complicated interactions between various stimuli and RAW‐OCs in the light of the recent progress.
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Affiliation(s)
- Lingbo Kong
- Department of Spine, School of Medicine, Honghui-hospital, Xi'an Jiaotong University, Xi'an, China
| | - Wanli Smith
- Department of Neuroscience, Johns Hopkins University, Baltimore, Maryland
| | - Dingjun Hao
- Department of Spine, School of Medicine, Honghui-hospital, Xi'an Jiaotong University, Xi'an, China
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21
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Luukkonen J, Hilli M, Nakamura M, Ritamo I, Valmu L, Kauppinen K, Tuukkanen J, Lehenkari P. Osteoclasts secrete osteopontin into resorption lacunae during bone resorption. Histochem Cell Biol 2019; 151:475-487. [PMID: 30637455 PMCID: PMC6542781 DOI: 10.1007/s00418-019-01770-y] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/02/2019] [Indexed: 01/27/2023]
Abstract
Osteopontin (OPN) is a non-collagenous extracellular sialylated glycoprotein located in bone. It is believed to be one of the key components in osteoclast attachment to bone during resorption. In this study, we characterized OPN and other glycoproteins found in the resorption lacunae to confirm the role of osteoclasts in OPN secretion using electron microscopy and mass spectrometry. Additionally, we examined the glycan epitopes of resorption pits and the effects of different glycan epitopes on the differentiation and function of osteoclasts. Osteoarthritic femoral heads were examined by immunohistochemistry to reveal the presence of OPN in areas of increased bone metabolism in vivo. Our results demonstrate that human osteoclasts secrete OPN into resorption lacunae on native human bone and on carbonated hydroxyapatite devoid of natural OPN. OPN is associated with an elevated bone turnover in osteoarthritic bone under experimental conditions. Our data further confirm that osteoclasts secrete OPN into the resorption pit where it may function as a chemokine for subsequent bone formation. We show that α2,3- and α2,6-linked sialic acids have a role in the process of osteoclast differentiation. OPN is one of the proteins that has both of the above sialic residues, hence we propose that de-sialylation can effect osteoclast differentiation in bone.
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Affiliation(s)
- Jani Luukkonen
- Department of Anatomy and Cell Biology, Cancer Research and Translational Medicine Research Unit, Faculty of Medicine, University of Oulu, P.O. Box 5000, Aapistie 5, 90014, Oulu, Finland.
| | - Meeri Hilli
- Department of Anatomy and Cell Biology, Cancer Research and Translational Medicine Research Unit, Faculty of Medicine, University of Oulu, P.O. Box 5000, Aapistie 5, 90014, Oulu, Finland
| | - Miho Nakamura
- Department of Anatomy and Cell Biology, Cancer Research and Translational Medicine Research Unit, Faculty of Medicine, University of Oulu, P.O. Box 5000, Aapistie 5, 90014, Oulu, Finland.,Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, 2-3-10 Kanda-Surugadai, Chiyoda, Tokyo, 1010062, Japan
| | - Ilja Ritamo
- Thermo Fisher Scientific Oy, Ratastie 2, 01620, Vantaa, Finland
| | - Leena Valmu
- Thermo Fisher Scientific Oy, Ratastie 2, 01620, Vantaa, Finland
| | - Kyösti Kauppinen
- Department of Anatomy and Cell Biology, Cancer Research and Translational Medicine Research Unit, Faculty of Medicine, University of Oulu, P.O. Box 5000, Aapistie 5, 90014, Oulu, Finland
| | - Juha Tuukkanen
- Department of Anatomy and Cell Biology, Cancer Research and Translational Medicine Research Unit, Faculty of Medicine, University of Oulu, P.O. Box 5000, Aapistie 5, 90014, Oulu, Finland
| | - Petri Lehenkari
- Department of Anatomy and Cell Biology, Cancer Research and Translational Medicine Research Unit, Faculty of Medicine, University of Oulu, P.O. Box 5000, Aapistie 5, 90014, Oulu, Finland
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22
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Dalla Via J, Duckham RL, Peake JM, Kukuljan S, Nowson CA, Daly RM. Circulating Levels of Inflammation and the Effect on Exercise-Related Changes in Bone Mass, Structure and Strength in Middle-Aged and Older Men. Calcif Tissue Int 2019; 104:50-58. [PMID: 30209527 DOI: 10.1007/s00223-018-0475-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Accepted: 09/10/2018] [Indexed: 01/11/2023]
Abstract
Chronic, low-grade systematic inflammation has been associated with bone loss and increased fracture risk. We previously reported that exercise improved femoral neck bone mineral density (BMD), geometry and strength and lumbar spine trabecular BMD in middle-aged and older men, but had no effect on markers of inflammation. The aim of this study was to examine the association between basal inflammatory status and the adaptive skeletal responses to exercise. Secondary analysis was completed on 91 men aged 50-79 years who participated in an 18-month program of progressive resistance training plus weight-bearing impact exercise (3 day/week) with and without additional calcium-vitamin D3. Markers of inflammation (serum hs-CRP, TNF-α and IL-6) and DXA and QCT-derived BMD, bone structure and strength at the lumbar spine and proximal femur were measured at baseline and 18 months. Multiple regression was used to assess associations between skeletal changes and both baseline levels of individual inflammatory markers and a composite inflammatory index derived from the number of markers categorized into the highest tertile. Baseline serum hs-CRP, TNFα and IL-6 and the composite inflammatory index score were not associated with skeletal changes at any site after adjusting for age, change in lean mass, disease(s)/medication use and adherence to the exercise intervention. In conclusion, this study indicates that basal inflammatory status does not influence the osteogenic response to exercise training in healthy middle-aged and older men.
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Affiliation(s)
- Jack Dalla Via
- Institute for Physical Activity and Nutrition, School of Exercise and Nutrition Sciences, Deakin University, 221 Burwood Highway, Burwood, Geelong, Melbourne, VIC, 3215, Australia
| | - Rachel L Duckham
- Institute for Physical Activity and Nutrition, School of Exercise and Nutrition Sciences, Deakin University, 221 Burwood Highway, Burwood, Geelong, Melbourne, VIC, 3215, Australia
- Australian Institute of Musculoskeletal Science (AIMSS), St. Albans, Melbourne, Australia
| | - Jonathan M Peake
- School of Biomedical Sciences and Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, Australia
| | - Sonja Kukuljan
- Institute for Physical Activity and Nutrition, School of Exercise and Nutrition Sciences, Deakin University, 221 Burwood Highway, Burwood, Geelong, Melbourne, VIC, 3215, Australia
| | - Caryl A Nowson
- Institute for Physical Activity and Nutrition, School of Exercise and Nutrition Sciences, Deakin University, 221 Burwood Highway, Burwood, Geelong, Melbourne, VIC, 3215, Australia
| | - Robin M Daly
- Institute for Physical Activity and Nutrition, School of Exercise and Nutrition Sciences, Deakin University, 221 Burwood Highway, Burwood, Geelong, Melbourne, VIC, 3215, Australia.
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23
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Guarnieri R, Di Nardo D, Gaimari G, Miccoli G, Testarelli L. Influence of restorative margins position on one-stage laser-microgrooved implants-supported single screwed crowns: A clinical, biochemical, and microbiological analysis. Clin Implant Dent Relat Res 2018; 21:52-59. [PMID: 30475431 DOI: 10.1111/cid.12693] [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: 06/23/2018] [Accepted: 10/05/2018] [Indexed: 11/27/2022]
Abstract
AIM To clinically, biochemically, and microbiologically evaluate the influence of crown margins position on one-stage laser-microgrooved implants. MATERIALS AND METHODS Twenty-one-stage titanium implants with a laser-microgrooved collar surface, supporting screwed, single crown restorations, were placed in 20 partially edentulous patients and evaluated. Clinical parameters included modified plaque index, modified gingival index, peri-implant probing pocket depth, bleeding on probing, and distance between implant shoulder and mucosal margin. The parameters were recorded at baseline (crowns delivery) and at every 6-month recall visit, until the end of the 3 years follow-up period. At the same time intervals, radiographic marginal bone levels were assessed at the mesial and distal aspect of the implant sites. For biochemical analysis, the volume of the peri-implant sulcus fluid, and its levels of interleukin-1beta (IL-1β), interleukin-6 (IL-6), and of tumor necrosis factor-α, were utilized to evaluate the peri-implant health conditions at the end of the 3-year follow-up period. At the same time, microbiological analysis, including the concentration of five putative periodontal pathogens (Aggregatibacter actinomycetemcomitans, Porphyromonas gingivalis, Prevotella intermedia, Treponema denticola, and Tannerella forsythensis), were assessed. The crown margins positions were classified into four groups (A = intracrevicular position >2 mm, B = intracrevicular position ≤2 mm/<1 mm, C = intracrevicular position ≤1 mm/<0 mm, and D = extracrevicular position), and the biochemical, and microbiological parameters were evaluated at 3 years. RESULTS No statistical differences of clinical and biochemical parameters were found between the four groups. In group A, compared to groups B, C, and D, a statistically significant higher concentration of putative periodontal pathogens was found. CONCLUSIONS Results showed that the intracrevicular deeper position of the restoration margin does not influence the clinical and biochemical peri-implant parameters. The deeper position of the crown margin is associated with a greater amount of putative periodontal pathogenic microflora colonization.
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Affiliation(s)
- Renzo Guarnieri
- Department of Dental and Maxillofacial Sciences, School of Dentistry, University La Sapienza, Rome, Italy
| | - Dario Di Nardo
- Department of Dental and Maxillofacial Sciences, School of Dentistry, University La Sapienza, Rome, Italy
| | - Gianfranco Gaimari
- Department of Dental and Maxillofacial Sciences, School of Dentistry, University La Sapienza, Rome, Italy
| | - Gabriele Miccoli
- Department of Dental and Maxillofacial Sciences, School of Dentistry, University La Sapienza, Rome, Italy
| | - Luca Testarelli
- Department of Dental and Maxillofacial Sciences, School of Dentistry, University La Sapienza, Rome, Italy
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Seldeen KL, Halley PG, Volmar CH, Rodríguez MA, Hernandez M, Pang M, Carlsson SK, Suva LJ, Wahlestedt C, Troen BR, Brothers SP. Neuropeptide Y Y2 antagonist treated ovariectomized mice exhibit greater bone mineral density. Neuropeptides 2018; 67:45-55. [PMID: 29129406 PMCID: PMC5805636 DOI: 10.1016/j.npep.2017.11.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/01/2017] [Revised: 11/06/2017] [Accepted: 11/06/2017] [Indexed: 12/15/2022]
Abstract
Osteoporosis, a disease characterized by progressive bone loss and increased risk of fracture, often results from menopausal loss of estrogen in women. Neuropeptide Y has been shown to negatively regulate bone formation, with amygdala specific deletion of the Y2 receptor resulting in increased bone mass in mice. In this study, ovariectomized (OVX) mice were injected once daily with JNJ-31020028, a brain penetrant Y2 receptor small molecule antagonist to determine the effects on bone formation. Antagonist treated mice had reduced weight and showed increased whole-body bone mineral density compared to vehicle-injected mice. Micro computerized tomography (micro-CT) demonstrated increased vertebral trabecular bone volume, connectivity density and trabecular thickness. Femoral micro-CT analysis revealed increased bone volume within trabecular regions and greater trabecular number, without significant difference in other parameters or within cortical regions. A decrease was seen in serum P1NP, a measure used to confirm positive treatment outcomes in bisphosphonate treated patients. C-terminal telopeptide 1 (CTX-1), a blood biomarker of bone resorption, was decreased in treated animals. The higher bone mineral density observed following Y2 antagonist treatment, as determined by whole-body DEXA scanning, is indicative of either enhanced mineralization or reduced bone loss. Additionally, our findings that ex vivo treatment of bone marrow cells with the Y2 antagonist did not affect osteoblast and osteoclast formation suggests the inhibitor is not affecting these cells directly, and suggests a central role for compound action in this system. Our results support the involvement of Y2R signalling in bone metabolism and give credence to the hypothesis that selective pharmacological manipulation of Y2R may provide anabolic benefits for treating osteoporosis.
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Affiliation(s)
- K L Seldeen
- Division of Geriatrics and Palliative Medicine, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY, USA; Research Service, Veterans Affairs Western New York Healthcare System, Buffalo, NY, USA
| | - P G Halley
- Center for Therapeutic Innovation, Department of Psychiatry and Behavioral Sciences, University of Miami Miller School of Medicine, Miami, FL, USA
| | - C H Volmar
- Center for Therapeutic Innovation, Department of Psychiatry and Behavioral Sciences, University of Miami Miller School of Medicine, Miami, FL, USA
| | - M A Rodríguez
- Bruce W. Carter VA Geriatric Research Education and Clinical Center (GRECC), Miami, FL, USA; University of Miami Miller School of Medicine, Miami, FL, USA
| | - M Hernandez
- Bruce W. Carter VA Geriatric Research Education and Clinical Center (GRECC), Miami, FL, USA; University of Miami Miller School of Medicine, Miami, FL, USA
| | - M Pang
- Division of Geriatrics and Palliative Medicine, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY, USA; Research Service, Veterans Affairs Western New York Healthcare System, Buffalo, NY, USA
| | - S K Carlsson
- Center for Therapeutic Innovation, Department of Psychiatry and Behavioral Sciences, University of Miami Miller School of Medicine, Miami, FL, USA
| | - L J Suva
- Department of Orthopaedic Surgery, Centre for Orthopaedic Research, University of Arkansas Medical School, Little Rock, AR, USA
| | - C Wahlestedt
- Center for Therapeutic Innovation, Department of Psychiatry and Behavioral Sciences, University of Miami Miller School of Medicine, Miami, FL, USA
| | - B R Troen
- Division of Geriatrics and Palliative Medicine, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY, USA; Research Service, Veterans Affairs Western New York Healthcare System, Buffalo, NY, USA
| | - S P Brothers
- Center for Therapeutic Innovation, Department of Psychiatry and Behavioral Sciences, University of Miami Miller School of Medicine, Miami, FL, USA.
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Akbar MA, Nardo D, Chen MJ, Elshikha AS, Ahamed R, Elsayed EM, Bigot C, Holliday LS, Song S. Alpha-1 antitrypsin inhibits RANKL-induced osteoclast formation and functions. Mol Med 2017; 23:57-69. [PMID: 28332697 DOI: 10.2119/molmed.2016.00170] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Accepted: 03/15/2017] [Indexed: 01/05/2023] Open
Abstract
Osteoporosis is a global public health problem affecting more than 200 million people worldwide. We previously showed that treatment with alpha-1 antitrypsin (AAT), a multifunctional protein with anti-inflammatory properties, mitigated bone loss in an ovariectomized mouse model. However, the underlying mechanisms of the protective effect of AAT on bone tissue are largely unknown. In this study, we investigated the effect of AAT on osteoclast formation and function in vitro. Our results showed that AAT dose-dependently inhibited the formation of RANKL (receptor activator of nuclear factor κB ligand) induced osteoclasts derived from mouse bone marrow macrophages/monocyte (BMM) lineage cells and the murine macrophage cell line, RAW 264.7 cells. In order to elucidate the possible mechanisms underlying this inhibition, we tested the effect of AAT on the gene expression of cell surface molecules, transcription factors, and cytokines associated with osteoclast formation. We showed that AAT inhibited M-CSF (macrophage colony-stimulating factor) induced cell surface RANK expression in osteoclast precursor cells. In addition, AAT inhibited RANKL-induced TNF-α production, cell surface CD9 expression, and dendritic cell-specific transmembrane protein (DC-STAMP) gene expression. Importantly, AAT treatment significantly inhibited osteoclast-associated mineral resorption. Together, these results uncovered new mechanisms for the protective effects of AAT and strongly support the notion that AAT has therapeutic potential for the treatment of osteoporosis.
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Affiliation(s)
- Mohammad Ahsanul Akbar
- Department of Pharmaceutics, College of Pharmacy, University of Florida, Gainesville, Florida, USA
| | - David Nardo
- Department of Pharmaceutics, College of Pharmacy, University of Florida, Gainesville, Florida, USA
| | - Mong-Jen Chen
- Department of Pharmaceutics, College of Pharmacy, University of Florida, Gainesville, Florida, USA
| | - Ahmed S Elshikha
- Department of Pharmaceutics, College of Pharmacy, University of Florida, Gainesville, Florida, USA
| | - Rubina Ahamed
- Department of Pharmaceutics, College of Pharmacy, University of Florida, Gainesville, Florida, USA
| | - Eslam M Elsayed
- Department of Pharmaceutics, College of Pharmacy, University of Florida, Gainesville, Florida, USA.,Department of Microbiology and Immunology, Faculty of Pharmacy, Zagazig University, Egypt
| | - Claire Bigot
- Department of Pharmaceutics, College of Pharmacy, University of Florida, Gainesville, Florida, USA
| | - Lexie Shannon Holliday
- Department of Orthodontics, College of Dentistry, University of Florida, Gainesville, Florida, USA.,Department of Anatomy and Cell Biology, College of Medicine, University of Florida, Gainesville, Florida, USA
| | - Sihong Song
- Department of Pharmaceutics, College of Pharmacy, University of Florida, Gainesville, Florida, USA
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Abstract
Osteoarthritis (OA) is a chronic inflammatory degenerative process that affects joints such as the hands, hips, shoulders, feet, spine, and especially knees in millions of people worldwide. Some authors have shown that Curcuma longa components may exhibit benefic effects in the treatment of degenerative diseases as OA. This plant belongs to the family Zingiberaceae and it is popularly known as turmeric or saffron. This review intended to perform a retrospective search to identify studies involving humans and animal models. This review was based on articles linking OA and C. longa. Databases as Medline, Science Direct, and Lilacs were consulted and a retrospective search was carried out in order to identify studies involving humans and animal models. The curcuminoids from C. longa exhibit actions at different locations in the pathogenesis of OA once it may play an important role as anti-inflammatory, down-regulating enzymes as phospholipase A2, cyclooxygenase-2, and lipoxygenases, and reducing tumor necrosis factor-alpha-and interleukins such as interleukin-1β (IL-1β), IL-6, and IL-8. They also act as inducer of apoptosis in synoviocytes, decreasing the inflammation process and may also reduce the synthesis of reactive oxygen species. For these reasons, new pharmaceutical technology and pharmacological studies should be proposed to determine the dose, the best delivery vehicle, pharmaceutical formulation and route of administration of this plant so its use as an adjunct in the treatment of OA may become a reality in clinical practice.
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Affiliation(s)
- Marina Cristina Akuri
- Department of Biochemistry and Pharmacology, School of Medicine, University of Marília, Brazil
| | - Sandra Maria Barbalho
- Department of Biochemistry and Pharmacology, School of Medicine, University of Marília, Brazil.,Department of Biochemistry and Nutrition, Faculty of Food Technology of Marília, Marília - SP, Brazil
| | - Raíssa Meira Val
- Department of Biochemistry and Pharmacology, School of Medicine, University of Marília, Brazil
| | - Elen Landgraf Guiguer
- Department of Biochemistry and Pharmacology, School of Medicine, University of Marília, Brazil.,Department of Biochemistry and Nutrition, Faculty of Food Technology of Marília, Marília - SP, Brazil
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27
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Guided bone regeneration is promoted by the molecular events in the membrane compartment. Biomaterials 2016; 84:167-183. [DOI: 10.1016/j.biomaterials.2016.01.034] [Citation(s) in RCA: 91] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2016] [Accepted: 01/18/2016] [Indexed: 11/18/2022]
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Bloom AC, Collins FL, Van't Hof RJ, Ryan ES, Jones E, Hughes TR, Morgan BP, Erlandsson M, Bokarewa M, Aeschlimann D, Evans BAJ, Williams AS. Deletion of the membrane complement inhibitor CD59a drives age and gender-dependent alterations to bone phenotype in mice. Bone 2016; 84:253-261. [PMID: 26721735 PMCID: PMC4764651 DOI: 10.1016/j.bone.2015.12.014] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/10/2015] [Revised: 12/11/2015] [Accepted: 12/21/2015] [Indexed: 11/28/2022]
Abstract
Degenerative joint diseases such as osteoarthritis are characterised by aberrant region-specific bone formation and abnormal bone mineral content. A recent study suggested a role for the complement membrane attack complex in experimental models of osteoarthritis. Since CD59a is the principal regulator of the membrane attack complex in mice, we evaluated the impact of CD59a gene deletion upon maintenance of bone architecture. In vivo bone morphology analysis revealed that male CD59a-deficient mice have increased femur length and cortical bone volume, albeit with reduced bone mineral density. However, this phenomenon was not observed in female mice. Histomorphometric analysis of the trabecular bone showed increased rates of bone homeostasis, with both increased bone resorption and mineral apposition rate in CD59a-deficient male mice. When bone cells were studied in isolation, in vitro osteoclastogenesis was significantly increased in male CD59a-deficient mice, although osteoblast formation was not altered. Our data reveal, for the first time, that CD59a is a regulator of bone growth and homeostasis. CD59a ablation in male mice results in longer and wider bones, but with less density, which is likely a major contributing factor for their susceptibility to osteoarthritis. These findings increase our understanding of the role of complement regulation in degenerative arthritis.
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Affiliation(s)
- Anja C Bloom
- Institute of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, UK
| | - Fraser L Collins
- Institute of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, UK
| | - Rob J Van't Hof
- Bone Research Group, Institute of Ageing & Chronic Disease, University ofLiverpool, Liverpool, UK
| | - Elizabeth S Ryan
- Institute of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, UK
| | - Emma Jones
- Institute of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, UK
| | - Timothy R Hughes
- Institute of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, UK
| | - B Paul Morgan
- Institute of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, UK
| | - Malin Erlandsson
- Department of Rheumatology and Inflammation Research, Sahlgrenska University Hospital, University of Göteborg, Gothenburg, Sweden
| | - Maria Bokarewa
- Department of Rheumatology and Inflammation Research, Sahlgrenska University Hospital, University of Göteborg, Gothenburg, Sweden
| | - Daniel Aeschlimann
- Matrix Biology and Tissue Repair, Dental School, Cardiff University, Cardiff, UK; Arthritis Research UK Centre for Biomechanics and Bioengineering, Cardiff University, Cardiff, UK
| | - Bronwen A J Evans
- Institute of Molecular and Experimental Medicine, School of Medicine, Cardiff University, Cardiff, UK; Arthritis Research UK Centre for Biomechanics and Bioengineering, Cardiff University, Cardiff, UK
| | - Anwen S Williams
- Institute of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, UK; Arthritis Research UK Centre for Biomechanics and Bioengineering, Cardiff University, Cardiff, UK.
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Greisen SR, Einarsson HB, Hvid M, Hauge EM, Deleuran B, Kragstrup TW. Spontaneous generation of functional osteoclasts from synovial fluid mononuclear cells as a model of inflammatory osteoclastogenesis. APMIS 2015; 123:779-86. [DOI: 10.1111/apm.12416] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2015] [Accepted: 06/03/2015] [Indexed: 01/05/2023]
Affiliation(s)
- Stinne R. Greisen
- Department of Biomedicine; Aarhus University; Aarhus Denmark
- Department of Rheumatology; Aarhus University Hospital; Aarhus Denmark
| | | | - Malene Hvid
- Department of Biomedicine; Aarhus University; Aarhus Denmark
| | - Ellen-Margrethe Hauge
- Department of Rheumatology; Aarhus University Hospital; Aarhus Denmark
- Department of Anatomy; Aarhus University; Aarhus Denmark
| | - Bent Deleuran
- Department of Biomedicine; Aarhus University; Aarhus Denmark
- Department of Rheumatology; Aarhus University Hospital; Aarhus Denmark
| | - Tue Wenzel Kragstrup
- Department of Biomedicine; Aarhus University; Aarhus Denmark
- Department of Rheumatology; Aarhus University Hospital; Aarhus Denmark
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30
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Osteoblasts subjected to tensile force induce osteoclastic differentiation of murine macrophages in a coculture system. J Dent Sci 2015. [DOI: 10.1016/j.jds.2013.11.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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31
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Yan W, Zhang C, Yang X, Liu Z, Wang X, Sun X, Wang Y, Zheng S. Abnormal Differentiation of Dental Pulp Cells in Cleidocranial Dysplasia. J Dent Res 2015; 94:577-83. [PMID: 25589510 DOI: 10.1177/0022034514566655] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Cleidocranial dysplasia (CCD) is a skeletal dysplasia caused by heterozygous mutations of RUNX2, a gene that is essential for the mineralization of bone and tooth. We isolated primary dental pulp cells from a 10-y-old patient and tested their proliferative capacity, alkaline phosphatase activity, and ability to form mineralized nodules, in comparison with those from 7 healthy children. All these measures were reduced in primary dental pulp cells from the CCD patient. The expression of the osteoblast/odontoblast-associated genes RUNX2, ALP, OCN, and DSPP was also found to be significantly decreased in the primary dental pulp cells of the CCD patient. The osteoclast-related markers TRAP, CTSK, CTR, and MMP9 were decreased in primary dental pulp cells cocultured with human peripheral blood mononuclear cells. Moreover, the expression of RANKL and the ratio of RANKL/OPG were both reduced in the cells from the CCD patient, indicating that the RUNX2 mutation interfered with the bone-remodeling pathway and decreased the capacity of primary dental pulp cells to support osteoclast differentiation. These effects may be partly responsible for the defects in tooth development and the retention of primary teeth that is typical of CCD.
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Affiliation(s)
- W.J. Yan
- Department of Preventive Dentistry, Peking University School and Hospital of Stomatology, Haidian District, Beijing, China
- Department of Pediatric Dentistry, the First Division, Peking University School and Hospital of Stomatology, Xicheng District, Beijing, China
| | - C.Y. Zhang
- Department of Preventive Dentistry, Peking University School and Hospital of Stomatology, Haidian District, Beijing, China
| | - X. Yang
- Department of Stomatology, Dongzhimen Hospital Beijing University of Chinese Medicine, Dongcheng District, Beijing, China
| | - Z.N. Liu
- Department of Prosthodontics, Peking University School and Hospital of Stomatology, Haidian District, Beijing, China
| | - X.Z. Wang
- Department of Preventive Dentistry, Peking University School and Hospital of Stomatology, Haidian District, Beijing, China
| | - X.Y. Sun
- Department of Preventive Dentistry, Peking University School and Hospital of Stomatology, Haidian District, Beijing, China
| | - Y.X. Wang
- Central Laboratory, Peking University School and Hospital of Stomatology, Haidian District, Beijing, China
| | - S.G. Zheng
- Department of Preventive Dentistry, Peking University School and Hospital of Stomatology, Haidian District, Beijing, China
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32
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Qi W, Gao Y, Tian J, Jiang H. Adseverin knockdown inhibits osteoclastogenesis in RAW264.7 cells. Int J Mol Med 2014; 34:1483-91. [PMID: 25339151 PMCID: PMC4214352 DOI: 10.3892/ijmm.2014.1941] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2014] [Accepted: 09/11/2014] [Indexed: 11/08/2022] Open
Abstract
Osteoclastogenesis is a complex process that is highly dependent on the dynamic regulation of the actin cytoskeleton. Adseverin (Ads), a member of the gelsolin superfamily of actin-binding proteins, regulates actin remodeling by severing and capping actin filaments. The objective of the present study was to characterize the role of Ads during osteoclastogenesis by assessing Ads expression and using a knockdown strategy. Immunoblot analyses were used to examine Ads expression during osteoclastogenesis. A stable Ads knockdown macrophage cell line was generated using a retroviral shRNA construct. Osteoclast differentiation was morphologically examined via cell staining with osteoclast specific markers and light microscopy. The results showed that Ads expression was significantly increased in response to receptor activator of nuclear factor-κB ligand during osteoclastogenesis, and Ads was highly expressed in mature osteoclasts. Ads-knockdown macrophages showed major osteoclastogenesis defects, most likely caused by a pre-osteoclast fusion defect. These results indicate that Ads deficiency in monocytes inhibits osteoclastogenesis. Thus, in future studies it could be noteworthy to investigate the function of Ads in bone marrow monocytes during osteoclastogenesis.
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Affiliation(s)
- Wenting Qi
- Department of Operative Dentistry and Endodontics, Guanghua School and Hospital of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Sun Yat‑sen University, Guangzhou, Guangdong 510055, P.R. China
| | - Yan Gao
- Department of Operative Dentistry and Endodontics, Guanghua School and Hospital of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Sun Yat‑sen University, Guangzhou, Guangdong 510055, P.R. China
| | - Jun Tian
- Department of Operative Dentistry and Endodontics, Guanghua School and Hospital of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Sun Yat‑sen University, Guangzhou, Guangdong 510055, P.R. China
| | - Hongwei Jiang
- Department of Operative Dentistry and Endodontics, Guanghua School and Hospital of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Sun Yat‑sen University, Guangzhou, Guangdong 510055, P.R. China
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Swales C, Athanasou NA, Knowles HJ. Angiopoietin-like 4 is over-expressed in rheumatoid arthritis patients: association with pathological bone resorption. PLoS One 2014; 9:e109524. [PMID: 25289668 PMCID: PMC4188739 DOI: 10.1371/journal.pone.0109524] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2014] [Accepted: 09/10/2014] [Indexed: 11/17/2022] Open
Abstract
INTRODUCTION Osteoclasts are responsible for the bone loss associated with rheumatoid arthritis (RA). The secreted adipokine angiopoietin-like 4 (ANGPTL4) specifically increases osteoclast-mediated bone resorption. We have investigated expression of ANGPTL4 and its regulatory transcription factor, hypoxia-inducible factor-1 alpha (HIF-1α), in osteoclasts and other cells within rheumatoid synovium. We have also examined whether circulating levels of ANGPTL4 differ in RA patients compared with that in normal controls or patients with osteoarthritis (OA). RESULTS Immunohistochemical analysis revealed that bone-apposing osteoclasts within the rheumatoid synovium express both ANGPTL4 and HIF-1α. ANGPTL4 was also strongly expressed in synovial lining cells, endothelial cells, stromal cells, CD68+ macrophages and plasma cells within RA synovium. Little ANGPTL4 was evident in normal synovial tissue. This reflected the over-expression of HIF-1α in rheumatoid versus normal synovial tissue. The concentration of ANGPTL4 was higher in both the serum and the synovial fluid of RA patients than in patients with OA or normal controls. High serum ANGPTL4 associated with elevated levels of the serum marker of bone resorption, receptor activator for nuclear factor κB ligand (RANKL). CONCLUSIONS Over-expression of ANGPTL4 in multiple cell types within the rheumatoid synovium potentially provides a local pool of ANGPTL4 to stimulate osteoclast-mediated bone resorption in RA. Additionally, correlation of high serum ANGPTL4 with circulating RANKL suggests that ANGPTL4 may represent a novel marker for bone destruction in RA.
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Affiliation(s)
- Catherine Swales
- Botnar Research Centre, Nuffield Department of Orthopaedics Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, United Kingdom
| | - Nicholas A Athanasou
- Pathology Department, Nuffield Orthopaedic Centre, University of Oxford, Oxford, United Kingdom
| | - Helen J Knowles
- Botnar Research Centre, Nuffield Department of Orthopaedics Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, United Kingdom
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Sun SX, Guo HH, Zhang J, Yu B, Sun KN, Jin QH. BMP-2 and titanium particles synergistically activate osteoclast formation. ACTA ACUST UNITED AC 2014; 47:461-9. [PMID: 24820069 PMCID: PMC4086172 DOI: 10.1590/1414-431x20132966] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2013] [Accepted: 11/25/2013] [Indexed: 02/06/2023]
Abstract
A previous study showed that BMP-2 (bone morphogenetic protein-2) and wear debris can
separately support osteoclast formation induced by the receptor activator of NF-κB
ligand (RANKL). However, the effect of BMP-2 on wear debris-induced osteoclast
formation is unclear. In this study, we show that neither titanium particles nor
BMP-2 can induce osteoclast formation in RAW 264.7 mouse leukemic monocyte macrophage
cells but that BMP-2 synergizes with titanium particles to enhance osteoclast
formation in the presence of RANKL, and that at a low concentration, BMP-2 has an
optimal effect to stimulate the size and number of multinuclear osteoclasts,
expression of osteoclast genes, and resorption area. Our data also clarify that the
effects caused by the increase in BMP-2 on phosphorylated SMAD levels such as c-Fos
expression increased throughout the early stages of osteoclastogenesis. BMP-2 and
titanium particles stimulate the expression of p-JNK, p-P38, p-IkB, and P50 compared
with the titanium group. These data suggested that BMP-2 may be a crucial factor in
titanium particle-mediated osteoclast formation.
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Affiliation(s)
- S X Sun
- Department of Orthopedics, Affiliated Hospital of Ningxia Medical University, Yinchuan, Ningxia Hui Autonomous Region, China
| | - H H Guo
- Ningxia Medical University, Ningxia Hui Autonomous Region, China
| | - J Zhang
- Institute of Pathology, Xi'an Jiaotong University, Xi'an Shaanxi, China
| | - B Yu
- Ningxia Medical University, Ningxia Hui Autonomous Region, China
| | - K N Sun
- Department of Orthopedics, Affiliated Hospital of Ningxia Medical University, Yinchuan, Ningxia Hui Autonomous Region, China
| | - Q H Jin
- Department of Orthopedics, Affiliated Hospital of Ningxia Medical University, Yinchuan, Ningxia Hui Autonomous Region, China
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Li J, Wan Z, Liu H, Li H, Liu L, Li R, Guo Y, Chen W, Zhang X, Zhang X. Osteoblasts subjected to mechanical strain inhibit osteoclastic differentiation and bone resorption in a co-culture system. Ann Biomed Eng 2013; 41:2056-66. [PMID: 23609024 DOI: 10.1007/s10439-013-0810-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2013] [Accepted: 04/12/2013] [Indexed: 01/10/2023]
Abstract
Bone remodeling is strictly mediated by the coupled activities of osteoblasts and osteoclasts, which are responsible for bone formation and resorption, respectively. Although many papers have been published on the mechanical responses of osteoblasts and osteoclasts, little is known about their communication during mechanical loading. In this study, a novel co-culture system was first established using Transwell culture inserts; MC3T3-E1 cells were embedded in the lower compartment of the inserts, and RAW264.7 cells were co-cultured in the upper compartment. The MC3T3-E1 cells were subjected to a mechanical strain of 2500 με at 0.5 Hz to investigate the effect of strain-loaded osteoblasts on co-cultured osteoclasts. The results showed that osteoblast-like cells were activated with an increase of alkaline phosphatase (ALP) activities. The strain-conditioned medium caused decreased activity of tartrate-resistant acid phosphatase and reduced the number of mature multinucleated osteoclasts, which subsequently resulted in the suppressed formation of resorption pits. The expression levels of cathepsin-K and matrix metalloproteinase-9 were also depressed by the strain-conditioned medium. In addition, we found that the expression ratio between osteoprotegerin (OPG) and receptor activator of NF-kB ligand in osteoblasts was significantly up-regulated due to the enhanced levels of OPG. In summary, we conclude that the strain-stimulated osteoblasts inhibited the differentiation and bone resorption of osteoclasts and that the mechanism was associated with the increased secretion of OPG in osteoblasts.
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Affiliation(s)
- Jianyu Li
- Institute of Medical Equipment of the Academy of Military Medical Sciences, No. 106 Wandong Road, Hedong District, Tianjin 300161, China
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Wang Y, Inger M, Jiang H, Tenenbaum H, Glogauer M. CD109 plays a role in osteoclastogenesis. PLoS One 2013; 8:e61213. [PMID: 23593435 PMCID: PMC3625217 DOI: 10.1371/journal.pone.0061213] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2012] [Accepted: 03/07/2013] [Indexed: 11/18/2022] Open
Abstract
Osteoclasts are large multinucleated cells that arise from the fusion of cells from the monocyte/macrophage lineage. Osteoclastogenesis is mediated by macrophage colony-stimulating factor (M-CSF) and receptor activator of nuclear factor-kB ligand (RANKL) and involves a complex multistep process that requires numerous other elements, many of which remain undefined. The primary aim of this project was to identify novel factors which regulate osteoclastogenesis. To carry out this investigation, microarray analysis was performed comparing two pre-osteoclast cell lines generated from RAW264.7 macrophages: one that has the capacity to fuse forming large multinucleated cells and one that does not fuse. It was found that CD109 was up-regulated by>17-fold in the osteoclast forming cell line when compared to the cell line that does not fuse, at day 2 of the differentiation process. Results obtained with microarray were confirmed by RT-qPCR and Western blot analyses in the two cell lines, in the parental RAW264.7 cell line, as well as primary murine monocytes from bone marrow. A significant increase of CD109 mRNA and protein expression during osteoclastogenesis occurred in all tested cell types. In order to characterize the role of CD109 in osteoclastogenesis, CD109 stable knockdown cell lines were established and fusion of osteoclast precursors into osteoclasts was assessed. It was found that CD109 knockdown cell lines were less capable of forming large multinucleated osteoclasts. It has been shown here that CD109 is expressed in monocytes undergoing RANKL-induced osteoclastogenesis. Moreover, when CD109 expression is suppressed in vitro, osteoclast formation decreases. This suggests that CD109 might be an important regulator of osteoclastogenesis. Further research is needed in order to characterize the role played by CD109 in regulation of osteoclast differentiation.
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Affiliation(s)
- Yongqiang Wang
- Matrix Dynamics Group, Faculty of Dentistry, University of Toronto, Toronto, Ontario, Canada
| | - Maayan Inger
- Matrix Dynamics Group, Faculty of Dentistry, University of Toronto, Toronto, Ontario, Canada
| | - Hongwei Jiang
- Matrix Dynamics Group, Faculty of Dentistry, University of Toronto, Toronto, Ontario, Canada
| | - Howard Tenenbaum
- Department of Periodontology, Faculty of Dentistry, University of Toronto, Toronto, Ontario, Canada
| | - Michael Glogauer
- Matrix Dynamics Group, Faculty of Dentistry, University of Toronto, Toronto, Ontario, Canada
- * E-mail:
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Inverse relationship between neutrophil lymphocyte ratio (NLR) and bone mineral density (BMD) in elderly people. Arch Gerontol Geriatr 2013; 57:81-5. [PMID: 23490023 DOI: 10.1016/j.archger.2013.02.005] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2012] [Revised: 02/12/2013] [Accepted: 02/14/2013] [Indexed: 01/06/2023]
Abstract
Osteoporosis is, an age related disorder, influencing elderly people worldwide. The latest data suggests that inflammation plays a critical role in bone remodeling and in pathogenesis of osteoporosis. NLR is a simple, non-invasive and cost-effective marker of inflammation in various malignancies and inflammatory diseases. The objective of the present study was to compare NLR levels in osteopenic, osteoporotic and control subjects and to assess the correlation between NLR levels and BMD. A total of 1635 patients aged 65 years or more were included in this cross-sectional study. BMD was measured by dual-energy X-ray absorptiometry (DEXA) at the lumbar spine and femur. Complete blood count (CBC), biomarkers of inflammation (C-reactive protein (CRP), erythrocyte sedimentation rate (ESR)), glucose/lipid metabolism and established risk factors were determined. In osteoporosis group, NLR levels were found to be elevated as compared to osteopenic and control group (2.54±1.45, 2.37±1.00 and 2.18±0.85, respectively). At multivariate analysis NLR emerged as independent predictor of osteoporosis (OR=1.122; 95%=1.020-1.235, p=0.018) and there was a significant negative correlation between lumbar spine (L2-L4), femoral neck scores and NLR (r=0.348, p<0.001; r=0.264, p=0.004, respectively). Elderly people with osteoporosis have elevated NLR levels, suggesting that inflammation may play an important role in bone remodeling.
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HIV and Bone Disease: A Perspective of the Role of microRNAs in Bone Biology upon HIV Infection. J Osteoporos 2013; 2013:571418. [PMID: 24286015 PMCID: PMC3826318 DOI: 10.1155/2013/571418] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/21/2013] [Revised: 08/15/2013] [Accepted: 09/11/2013] [Indexed: 01/01/2023] Open
Abstract
Increased life expectancy and the need for long-term antiretroviral therapy have brought new challenges to the clinical management of HIV-infected individuals. The prevalence of osteoporosis and fractures is increased in HIV-infected patients; thus optimal strategies for risk management and treatment in this group of patients need to be defined. Prevention of bone loss is an important component of HIV care as the HIV population grows older. Understanding the mechanisms by which HIV infection affects bone biology leading to osteoporosis is crucial to delineate potential adjuvant treatments. This review focuses on HIV-induced osteoporosis within the context of microRNAs (miRNAs) by reviewing first basic concepts of bone biology as well as current knowledge of the role of miRNAs in bone development. Evidence that HIV-associated osteoporosis is in part independent of therapies employed to treat HIV (HAART) is supported by cross-sectional and longitudinal studies and is the focus of this review.
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Crotti TN, Dharmapatni AASSK, Alias E, Zannettino ACW, Smith MD, Haynes DR. The immunoreceptor tyrosine-based activation motif (ITAM) -related factors are increased in synovial tissue and vasculature of rheumatoid arthritic joints. Arthritis Res Ther 2012; 14:R245. [PMID: 23146195 PMCID: PMC3674611 DOI: 10.1186/ar4088] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2012] [Accepted: 11/06/2012] [Indexed: 12/11/2022] Open
Abstract
Introduction The immunoreceptor tyrosine-based activation motif (ITAM) pathway provides osteoclast co-stimulatory signals and regulates proliferation, survival and differentiation of effector immune cells. In the osteoclast, the receptors Triggering Receptor Expressed on Myeloid cells 2 (TREM2) and Osteoclast Associated Receptor (OSCAR) and their respective adaptor proteins, DAP12 and FcRγ mediate ITAM signals and induce calcium signaling and the crucial transcription factor, NFATc1. In rheumatoid arthritis (RA), OSCAR expression by monocytes is inversely correlated with disease activity. Additionally, serum levels of OSCAR are reduced in RA patients versus healthy controls suggesting that expression and secretion or cleavage of soluble (s) OSCAR is immune modulated. Recent data suggest that endothelial cells may also be a source of OSCAR. Methods ITAM receptors, their adaptor proteins, and NFATc1 and cathepsin K were detected in human synovial tissues by immunohistochemistry. Synovial tissues from patients with active RA were compared with tissue from patients in remission, osteoarthritis (OA) patients and healthy individuals. OSCAR was measured by immunoassay in synovial fluids recovered from active RA and OA patients. Endothelial cells were cultured with or without 5 ng/mL TNF-α or IL-1β over 72 hours. Temporal expression of OSCAR mRNA was assessed by qRT PCR and OSCAR protein in the supernatant was measured by ELISA. Results Significantly higher (P < 0.05) NFATc1-positive inflammatory cell aggregates were found in active RA tissues than in healthy synovial tissue. Similarly, the percentage of OSCAR, FcRγ, DAP12 and TREM2 positive cells was significantly higher in active RA tissues compared to the healthy synovial tissue. Notably, OSCAR was strongly expressed in the microvasculature of the active RA tissues (9/9), inactive RA (8/9) weakly in OA (4/9) but only in the lumen of healthy synovial tissue (0/8). OSCAR levels were detected in synovial fluids from both RA (47 to 152 ng/mL) and OA (112 to 145 ng/mL) patients. Moreover, OSCAR mRNA expression and soluble OSCAR release was stimulated by TNF-α and IL1-β in cultured endothelial cells. Conclusions Increased levels of ITAM related factors were present in synovial tissue from active RA joints compared to OA and healthy joints. OSCAR was strongly expressed by the vasculature of active RA patients and membrane bound and soluble OSCAR was stimulated by inflammatory mediators in endothelial cells in vitro.
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Kuyumcu ME, Yesil Y, Oztürk ZA, Cınar E, Kızılarslanoglu C, Halil M, Ulger Z, Yesil NK, Cankurtaran M, Arıoğul S. The association between homocysteine (hcy) and serum natural antioxidants in elderly bone mineral densitometry (BMD). Arch Gerontol Geriatr 2012; 55:739-43. [DOI: 10.1016/j.archger.2012.05.004] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2012] [Revised: 05/11/2012] [Accepted: 05/12/2012] [Indexed: 02/04/2023]
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Schlecht SH, Pinto DC, Agnew AM, Stout SD. Brief communication: The effects of disuse on the mechanical properties of bone: What unloading tells us about the adaptive nature of skeletal tissue. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2012; 149:599-605. [DOI: 10.1002/ajpa.22150] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2012] [Accepted: 08/24/2012] [Indexed: 11/07/2022]
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Aswar UM, Mohan V, Bodhankar SL. Antiosteoporotic activity of phytoestrogen-rich fraction separated from ethanol extract of aerial parts of Cissus quadrangularis in ovariectomized rats. Indian J Pharmacol 2012; 44:345-50. [PMID: 22701244 PMCID: PMC3371457 DOI: 10.4103/0253-7613.96310] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/04/2011] [Revised: 01/03/2012] [Accepted: 02/28/2012] [Indexed: 02/05/2023] Open
Abstract
OBJECTIVE Cissus quadrangularis L. (C. quadrangularis L.) (Vitaceae) has been reported in Ayurveda for its antiosteoporotic activity. The study separated the phytoestrogen-rich fraction (IND-HE) from aerial parts of C. quadrangularis L. and evaluated its effect on osteoporosis caused by ovariectomy in rats. MATERIALS AND METHODS IND-HE was separated from the ethanol extract of C. quadrangularis. Ovariectomized female Wistar rats were divided into four groups (n = 6). Group 1: Control (distilled water), Group II: IND-HE (75 mg/kg p.o.), Group III: IND-HE (100 mg/kg p.o.) were treated once daily for 8 weeks and Group IV: standard estradiol group, received estrogen (1 mg/kg, s.c. bi-weekly). The effects on body weight were determined. DEXA (Dual energy-emission X-ray absorptimatory analysis) of whole body bone and femur was carried out. Blood was removed and analyzed for biochemical parameters. After sacrificing the animals, biomechanical study of right tibia and histopathology of pelvic bone was carried out. RESULTS IND-HE showed presence of phytoestrogen-rich fraction. IND-HE (75 and 100 mg/ kg) and estrogen treatment showed statistically significant increase in bone thickness, bone density and bone hardness. IND-HE (75 and 100 mg/kg) and estrogen treatment significantly increased serum estradiol. IND-HE (100 mg/kg) (P<0.05) and estrogen treatment increased serum vitamin D3 and serum calcium compared to control. Alkaline phosphatase was significantly reduced by IND-HE (100 mg/kg p.o.) and estrogen treatment. Histopathology and DEXA results indicated that IND-HE (75 and 100 mg/kg) prevented bone loss. DISCUSSION AND CONCLUSION These findings confirm that phytoestrogen-rich fraction (IND- HE) possess good antiosteoporotic activity.
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Affiliation(s)
- Urmila M Aswar
- Department of Pharmacology, STES's Sinhgad Institute of Pharmacy, Narhe, Pune, Maharashtra, India
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Zhan X, Zhang C, Dissanayaka WL, Cheung GSP, Jin L, Yang Y, Yan F, Tong EHY. Storage media enhance osteoclastogenic potential of human periodontal ligament cells via RANKL-independent signaling. Dent Traumatol 2012; 29:59-65. [PMID: 22487464 DOI: 10.1111/j.1600-9657.2012.01138.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
BACKGROUND Hank's balanced salt solution (HBSS) and milk have gained wide acceptance as storage media for avulsed tooth. However, the effect of the media and storage time on the periodontal ligament (PDL) cells involvement in the development of root resorption is still unclear. The purpose of this study was to evaluate whether precultured PDL cells in HBSS, milk, or modified Eagle's medium alpha (α-MEM) would affect osteoclastogenesis. MATERIALS AND METHODS PDL cells were precultured in HBSS, milk, or α-MEM for 1 h or 6 h before being co-cultured with RAW 264.7 cells for an additional 3 days for mRNA analysis and 11 days for osteoclastogenesis assay. RESULTS Cyclooxygenase-2 (COX-2) mRNA was detected immediately in PDL cells precultured in the three storage media. The expression was up-regulated markedly in all co-cultures when compared with RAW cells alone. As a result of the co-culture, interleukin-1β (IL-1β) expression was detectable in both PDL and RAW cells. TRAP+ multinucleated, osteoclast-like cells developed in all co-cultures; the number of TRAP+ cells was highest (P < 0.05) in the co-cultures that PDL cells precultured in milk for 6 h. The mRNA level of receptor activator of nuclear factor-kappa B ligand (RANKL) was not detected in PDL cells. Osteoprotegerin (OPG) mRNA expression reduced with increased preculture time, but the difference was not significant (P > 0.05). CONCLUSIONS PDL cells kept in the three storage media led to TRAP+ multinucleated, osteoclast-like cells formation via RANKL-independent signaling. The ability to induce osteoclastogenesis may be considered as one of the factors to evaluate the ability of storage medium to maintain PDL viability after tooth avulsion.
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Affiliation(s)
- Xuan Zhan
- Endodontics, Comprehensive Dental Care, The University of Hong Kong, Hong Kong, China
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Maruotti N, Corrado A, Neve A, Cantatore FP. Bisphosphonates: effects on osteoblast. Eur J Clin Pharmacol 2012; 68:1013-8. [PMID: 22318756 DOI: 10.1007/s00228-012-1216-7] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2011] [Accepted: 01/10/2012] [Indexed: 01/06/2023]
Abstract
PURPOSE Bisphosphonates are synthetic analogues of pyrophosphate usually used in treating bone disorders such as osteoporosis, Paget's disease, fibrous dysplasia, hypercalcemia of malignancy, and inflammation-related bone loss. Though therapeutic effects of bisphosphonates depend primarily on their inhibitory effect on osteoclasts, increasing attention is being given to other effector cells, such as osteoblasts. This review focuses on the presumed effect of bisphosphonates on osteoblasts. METHODS A review of the literature was conducted to evaluate the pharmacodynamic effects of bisphosphonates including inhibition of osteoclasts and apoptosis of osteocytes and osteoblasts as well as their potential stimulatory effects on the proliferation of osteoblasts. RESULTS Studies have demonstrated that bisphosphonates may stimulate proliferation of osteoblasts and inhibit apoptosis of osteocytes and osteoblasts. CONCLUSION Considering that osteoblasts may be involved in bone disorders, such as osteoporosis, osteopetrosis, osteogenesis imperfecta, and Paget's disease, and that bisphosphonates may stimulate proliferation of osteoblasts and inhibit apoptosis of osteocytes and osteoblasts, it is conceivable that a role for bisphosphonates exists in these diseases beyond merely the osteoclast influence.
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Affiliation(s)
- Nicola Maruotti
- Department of Rheumatology, University of Foggia Medical School, Foggia, Italy
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Balkan W, Rodríguez-Gonzalez M, Pang M, Fernandez I, Troen BR. Retinoic acid inhibits NFATc1 expression and osteoclast differentiation. J Bone Miner Metab 2011; 29:652-61. [PMID: 21384111 DOI: 10.1007/s00774-011-0261-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/30/2010] [Accepted: 01/10/2011] [Indexed: 10/18/2022]
Abstract
Ingestion of excess vitamin A appears to correlate with an increased fracture risk, an outcome that is likely mediated by retinoic acids (RAs); these are vitamin A metabolites that have dramatic effects on skeletal development. We studied the impacts of RA and isoform-specific RA receptor (RAR) agonists (α, β, and γ) on osteoclast formation (osteoclastogenesis) in two model systems: RAW264.7 cells and murine bone marrow-derived monocytes. The pan-RAR agonists, all-trans and 9-cis RA, inhibited receptor activator of nuclear factor kappa B ligand (RANKL)-mediated osteoclast differentiation in a concentration-dependent manner. Isoform-specific RAR agonists (α, β, and γ) also inhibited osteoclastogenesis, with the RARα agonist producing the most consistent reductions in both osteoclast number and size and total area covered. Inhibition of osteoclastogenesis correlated with reductions in expression, DNA binding, and nuclear abundance of nuclear factor of activated T cells c1 (NFATc1), a transcription factor critical for osteoclastogenesis. The upregulation of three NFATc1-responsive genes, cathepsin K, dendritic cell-specific transmembrane protein and osteoclast-associated receptor were similarly reduced following RA or RAR agonist exposure. These results suggest that RA blocks in vitro RANKL-mediated osteoclastogenesis by decreasing NFATc1 function.
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Affiliation(s)
- Wayne Balkan
- Geriatric Research, Education, and Clinical Center and Research Service, Bruce W. Carter Veterans Affairs Healthcare System, Miami, FL 33125, USA.
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Lu Y, Liu YZ, Liu PY, Dvornyk V, Deng HW. A bootstrap-based regression method for comprehensive discovery of differential gene expressions: an application to the osteoporosis study. Eur J Med Genet 2011; 54:e560-4. [PMID: 21843665 DOI: 10.1016/j.ejmg.2011.07.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2010] [Accepted: 07/08/2011] [Indexed: 10/17/2022]
Abstract
UNLABELLED A common purpose of microarray experiments is to study the variation in gene expression across the categories of an experimental factor such as tissue types and drug treatments. However, it is not uncommon that the studied experimental factor is a quantitative variable rather than categorical variable. Loss of information would occur by comparing gene-expression levels between groups that are factitiously defined according to the quantitative threshold values of an experimental factor. Additionally, lack of control for some sensitive clinical factors may bring serious false positive or negative findings. In the present study, we described a bootstrap-based regression method for analyzing gene-expression data from the non-categorical microarray experiments. To illustrate the utility of this method, we applied it to our recent gene-expression study of circulating monocytes in subjects with a wide range of variations in bone mineral density (BMD). This method allows a comprehensive discovery of gene expressions associated with osteoporosis-related traits while controlling other common confounding factors such as height, weight and age. Several genes identified in our study are involved in osteoblast and osteoclast functions and bone remodeling and/or menopause-associated estrogen-dependent pathways, which provide important clues to understand the etiology of osteoporosis. AVAILABILITY SAS code is available from the authors upon request.
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Affiliation(s)
- Yan Lu
- College of Life Sciences and Bioengineering, Beijing Jiaotong University, Beijing 100044, PR China
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Alonso-Bouzon C, Duque G. [Senile osteoporosis: an update]. Rev Esp Geriatr Gerontol 2011; 46:223-229. [PMID: 21601957 DOI: 10.1016/j.regg.2011.02.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2011] [Accepted: 02/17/2011] [Indexed: 05/30/2023]
Abstract
Knowledge of the mechanisms underlying the development of osteoporosis in the elderly has advanced greatly in the past few years. After an initial sudden loss of bone mineral mass in the peri-menopausal period there follows a more progressive and gradual loss that has also been seen in men. This initial drop in bone mass is due to a significant increase in bone resorption. There is also a significant reduction in bone formation with age that is mainly due to osteoblastogenesis in the bone marrow passing to a second plane, transferring its main role to adipogenesis. In this article, the latest evidence on the pathophysiology of senile osteoporosis is reviewed, highlighting the mechanisms of action of available treatments. Potential future treatments are also considered, which include new therapeutic approaches based on the pathophysiology of osteoporosis in the elderly, mainly on the potential reversibility of the adipogenesis.
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Affiliation(s)
- Cristina Alonso-Bouzon
- Ageing Bone Research Program, Sydney Medical School-Nepean Campus, The University of Sydney, Penrith, NSW, Australia
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Nitta T, Ohigashi I, Nakagawa Y, Takahama Y. Cytokine crosstalk for thymic medulla formation. Curr Opin Immunol 2010; 23:190-7. [PMID: 21194915 DOI: 10.1016/j.coi.2010.12.002] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2010] [Revised: 11/24/2010] [Accepted: 12/03/2010] [Indexed: 01/12/2023]
Abstract
The medullary microenvironment of the thymus plays a crucial role in the establishment of self-tolerance through the deletion of self-reactive thymocytes and the generation of regulatory T cells. Crosstalk or bidirectional signal exchanges between developing thymocytes and medullary thymic epithelial cells (mTECs) contribute to the formation of the thymic medulla. Recent studies have identified the molecules that mediate thymic crosstalk. Tumor necrosis factor superfamily cytokines, including RANKL, CD40L, and lymphotoxin, produced by positively selected thymocytes and lymphoid tissue inducer cells promote the proliferation and differentiation of mTECs. In return, CCR7 ligand chemokines produced by mTECs facilitate the migration of positively selected thymocytes to the medulla. The cytokine crosstalk between developing thymocytes and mTECs nurtures the formation of the thymic medulla and thereby regulates the establishment of self-tolerance.
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Affiliation(s)
- Takeshi Nitta
- Division of Experimental Immunology, Institute for Genome Research, University of Tokushima, Tokushima 770-8503, Japan
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Abstract
Breast cancer frequently metastasizes to the skeleton, interrupting the normal bone remodeling process and causing bone degradation. Osteolytic lesions are the end result of osteoclast activity; however, osteoclast differentiation and activation are mediated by osteoblast production of RANKL (receptor activator for NFκB ligand) and several osteoclastogenic cytokines. Osteoblasts themselves are negatively affected by cancer cells as evidenced by an increase in apoptosis and a decrease in proteins required for new bone formation. Thus, bone loss is due to both increased activation of osteoclasts and suppression of osteoblasts. This review summarizes the current understanding of the osteolytic mechanisms of bone metastases, including a discussion of current therapies.
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Bonfoh N, Novinyo E, Lipinski P. Modeling of bone adaptative behavior based on cells activities. Biomech Model Mechanobiol 2010; 10:789-98. [DOI: 10.1007/s10237-010-0274-y] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2010] [Accepted: 11/18/2010] [Indexed: 11/28/2022]
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