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Sun R, Duan D, Li R. Transcriptome Sequencing Identifies Abnormal lncRNAs and mRNAs and Reveals Potentially Hub Immune-Related mRNA in Osteoporosis with Vertebral Fracture. Clin Interv Aging 2024; 19:203-217. [PMID: 38352274 PMCID: PMC10863500 DOI: 10.2147/cia.s441251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Accepted: 01/17/2024] [Indexed: 02/16/2024] Open
Abstract
Background Recent studies have put forward the viewpoint of "bone immunology", which holds that the immune system and immune factors play an important regulatory role in the occurrence and development of osteoporosis. This study was intended to identify genetic characteristics of differentially expressed immune-related mRNA and lncRNA in patients combined with osteoporosis and vertebral fracture. Methods The peripheral blood samples were obtained from 3 groups of subjects: healthy control (HC), osteoporosis patients without vertebral fracture (OWF), and osteoporosis patients combined with vertebral fracture (OVF). The data were integrated to obtain differentially expressed mRNAs (DEmRNAs) and differentially expressed lncRNAs (DElncRNAs). Subsequently, the protein-protein interaction (PPI) networks were constructed. Gene Ontology (GO) and Kyoto Encyclopaedia of Genes and Genomes (KEGG) enrichment analyses were performed. Cytoscape-cytoHubba plug-in was used to identify key DEmRNAs. Furthermore, lncRNA-miRNA-mRNA, mRNA-lncRNA co-expression and transcription factors (TFs) networks were constructed. In addition, real-time PCR verification was performed. Results Totally of 3378 lncRNA-mRNA pairs were obtained, and the lncRNA co-expressed mRNA was mainly enriched in immune-related pathways, especially in GO-biological process (GO-BP) analysis. A total of 8 hub immune-related DEmRNAs were obtained, including IL18R1, IL18RAP, SLC11A1, CSF2RA, CCR3, IL1R2, PGLYRP1, and IL1R1. The TFs network showed that 8 hub immune-related DEmRNAs had interacting TFs. The co-expression network showed that 7 hub immune-related DEmRNAs (IL18R1, IL18RAP, SLC11A1, CSF2RA, IL-1R2, PGLYRP1, and IL1R1) had lncRNA-mRNA co-expression relationship. In addition, the lncRNA-miRNA-mRNA network includes 32 miRNAs, 7 hub immune-related mRNAs (IL18R1, IL18RAP, CSF2RA, CCR3, IL1R2, PGLYRP1, and IL1R1), and 11 lncRNAs. Conclusion Our study provides a novel and in-depth identification of co-expressed mRNAs and lncRNAs in patients combined with osteoporosis and vertebral fracture at a molecular level. This may provide new candidate biomarkers for the diagnosis of patients with high-risk fractures in the future.
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Affiliation(s)
- Rongxin Sun
- Department of Orthopaedics, The Sixth Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang Province, People’s Republic of China
| | - Desheng Duan
- Second Department of Orthopaedics, Third People’s Hospital of Anyang City, Anyang City, Henan Province, People’s Republic of China
| | - Renzeng Li
- Second Department of Orthopaedics, Third People’s Hospital of Anyang City, Anyang City, Henan Province, People’s Republic of China
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Wang Q, Kong X, Guo W, Liu L, Tian Y, Tao X, Lin N, Su X. HSP90 Exacerbates Bone Destruction in Rheumatoid Arthritis by Activating TRAF6/NFATc1 Signaling. Inflammation 2024; 47:363-375. [PMID: 37902841 DOI: 10.1007/s10753-023-01914-2] [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: 08/15/2023] [Revised: 09/25/2023] [Accepted: 09/27/2023] [Indexed: 11/01/2023]
Abstract
Rheumatoid arthritis (RA) is an autoimmune disease characterized by a notably high disability rate, primarily attributed to cartilage and bone degradation. The involvement of heat shock protein 90 (HSP90) as a molecular chaperone in the inflammatory response of RA has been established, but its role in bone destruction remains uncertain. In the present study, the expression of HSP90 was augmented in osteoclasts induced by the receptor activator of nuclear factor-κB ligand. Additionaly, it was observed that the outcomes revealed a noteworthy inhibition of osteoclast formation and differentation when triptolide was utilized to hinder the expression of HSP90. Furthermore, the positive influence of HSP90 in osteoclast differentiation was substantiated by overexpressing HSP90 in osteoclast precursor cells. Mechanically, HSP90 significantly activated the TNF receptor-associated factor 6 (TRAF6)/Nuclear factor of activated T cells 1 (NFATc1) signaling axis, accompanied by markedly promoting osteoclast differentiation. This effect was consistently observed in the destructive joint of rats with collagen-induced arthritis, where HSP90 effectively activated osteoclasts and contributed to arthritic bone destruction by activating the TRAF6/NFATc1 signaling. Overall, the findings of this study provide compelling evidence that HSP90 exacerbates bone destruction in RA by promoting osteoclast differentiation through the activation of TRAF6/NFATc1 signaling, and interference with HSP90 may be a promising strategy for the discovery of anti-arthritic bone destruction agents.
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Affiliation(s)
- Qian Wang
- Institute of Chinese Materia Medica, China, Academy of Chinese Medicine Sciences , Beijing, China
- School of Pharmacy, Anhui University of Chinese Medicine, Hefei, Anhui, China
| | - Xiangying Kong
- Institute of Chinese Materia Medica, China, Academy of Chinese Medicine Sciences , Beijing, China
| | - Wanyi Guo
- Institute of Chinese Materia Medica, China, Academy of Chinese Medicine Sciences , Beijing, China
| | - Liling Liu
- Institute of Chinese Materia Medica, China, Academy of Chinese Medicine Sciences , Beijing, China
| | - Yage Tian
- Institute of Chinese Materia Medica, China, Academy of Chinese Medicine Sciences , Beijing, China
| | - Xueying Tao
- Institute of Chinese Materia Medica, China, Academy of Chinese Medicine Sciences , Beijing, China
| | - Na Lin
- Institute of Chinese Materia Medica, China, Academy of Chinese Medicine Sciences , Beijing, China.
| | - Xiaohui Su
- Institute of Chinese Materia Medica, China, Academy of Chinese Medicine Sciences , Beijing, China.
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Kyriakaki I, Karanikola T, Lillis T, Kontonasaki E, Dabarakis N. Effect of direct oral anticoagulant dabigatran on early bone healing: An experimental study in rats. JOURNAL OF ADVANCED PERIODONTOLOGY & IMPLANT DENTISTRY 2023; 15:86-92. [PMID: 38357331 PMCID: PMC10862050 DOI: 10.34172/japid.2023.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Accepted: 09/30/2023] [Indexed: 02/16/2024]
Abstract
Background Dabigatran belongs to the new generation of direct oral anticoagulants (DOACs). Its advantages are oral administration and no need for international normalized ratio (INR) monitoring. Although its use has increased, its potential side effects on bone healing and remodeling have not been fully investigated. The present study aimed to evaluate the possible effects of dabigatran on early bone healing. Methods Sixteen male Wistar rats were divided into two groups; in group A, 20-mg/kg dabigatran dose was administered orally daily for 15 days, while group B served as a control. Two circular bone defects (d=6 mm) were created on either side of the parietal bones. Two weeks after surgery and euthanasia of the animals, tissue samples (parietal bones that contained the defects) were harvested for histological and histomorphometric analysis. Statistical analysis was performed with a significance level of α=0.5. Results No statistically significant differences were found between the two groups regarding the regenerated bone (21.9% vs. 16.3%, P=0.172) or the percentage of bone bridging (63.3% vs. 53.5%, P=0.401). Conclusion Dabigatran did not affect bone regeneration, suggesting that it might be a safer drug compared to older anticoagulants known to lead to bone healing delay.
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Affiliation(s)
- Ioanna Kyriakaki
- Department of Dentoalveolar Surgery, Surgical Implantology and Roentgenology, Aristotle University, Thessaloniki, Greece
| | - Theodora Karanikola
- Private Practice, Clinical Instructor, Department of Oral Surgery, Implantology and Dental Radiology, School of Dentistry, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Theodoros Lillis
- Department of Dentoalveolar Surgery, Surgical Implantology and Roentgenology, Aristotle University, Thessaloniki, Greece
| | - Eleana Kontonasaki
- Department of Prosthodontics, School of Dentistry, Aristotle University of Thessaloniki, Greece
| | - Nikolaos Dabarakis
- Department of Dentoalveolar Surgery, Surgical Implantology and Roentgenology, Aristotle University, Thessaloniki, Greece
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Strizova Z, Benesova I, Bartolini R, Novysedlak R, Cecrdlova E, Foley L, Striz I. M1/M2 macrophages and their overlaps - myth or reality? Clin Sci (Lond) 2023; 137:1067-1093. [PMID: 37530555 PMCID: PMC10407193 DOI: 10.1042/cs20220531] [Citation(s) in RCA: 20] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Revised: 07/03/2023] [Accepted: 07/11/2023] [Indexed: 08/03/2023]
Abstract
Macrophages represent heterogeneous cell population with important roles in defence mechanisms and in homoeostasis. Tissue macrophages from diverse anatomical locations adopt distinct activation states. M1 and M2 macrophages are two polarized forms of mononuclear phagocyte in vitro differentiation with distinct phenotypic patterns and functional properties, but in vivo, there is a wide range of different macrophage phenotypes in between depending on the microenvironment and natural signals they receive. In human infections, pathogens use different strategies to combat macrophages and these strategies include shaping the macrophage polarization towards one or another phenotype. Macrophages infiltrating the tumours can affect the patient's prognosis. M2 macrophages have been shown to promote tumour growth, while M1 macrophages provide both tumour-promoting and anti-tumour properties. In autoimmune diseases, both prolonged M1 activation, as well as altered M2 function can contribute to their onset and activity. In human atherosclerotic lesions, macrophages expressing both M1 and M2 profiles have been detected as one of the potential factors affecting occurrence of cardiovascular diseases. In allergic inflammation, T2 cytokines drive macrophage polarization towards M2 profiles, which promote airway inflammation and remodelling. M1 macrophages in transplantations seem to contribute to acute rejection, while M2 macrophages promote the fibrosis of the graft. The view of pro-inflammatory M1 macrophages and M2 macrophages suppressing inflammation seems to be an oversimplification because these cells exploit very high level of plasticity and represent a large scale of different immunophenotypes with overlapping properties. In this respect, it would be more precise to describe macrophages as M1-like and M2-like.
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Affiliation(s)
- Zuzana Strizova
- Department of Immunology, Second Faculty of Medicine, Charles University and University Hospital Motol, V Uvalu 84, 15006, Prague, Czech Republic
| | - Iva Benesova
- Department of Immunology, Second Faculty of Medicine, Charles University and University Hospital Motol, V Uvalu 84, 15006, Prague, Czech Republic
| | - Robin Bartolini
- Chemokine Research Group, Institute of Infection, Immunity and Inflammation, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow G12 8TT, U.K
| | - Rene Novysedlak
- Third Department of Surgery, First Faculty of Medicine, Charles University and University Hospital Motol, V Uvalu 84, 15006, Prague, Czech Republic
| | - Eva Cecrdlova
- Department of Clinical and Transplant Immunology, Institute for Clinical and Experimental Medicine, Prague, Czech Republic
| | - Lily Koumbas Foley
- Chemokine Research Group, Institute of Infection, Immunity and Inflammation, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow G12 8TT, U.K
| | - Ilja Striz
- Department of Clinical and Transplant Immunology, Institute for Clinical and Experimental Medicine, Prague, Czech Republic
- Institute of Immunology and Microbiology, First Faculty of Medicine, Charles University, Prague, Czech Republic
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Lu Z, Li Y, Yu H, Lopes-Virella MF, Huang Y. High-fat diet-induced metabolic syndrome increases ligature-induced alveolar bone loss in mice. Oral Dis 2023; 29:1312-1323. [PMID: 34914154 DOI: 10.1111/odi.14105] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 11/17/2021] [Accepted: 11/25/2021] [Indexed: 12/15/2022]
Abstract
BACKGROUND It has been well documented that metabolic syndrome (MetS) increases severity of periodontitis. In this study, we determined the effect of high-fat diet (HFD)-induced MetS on alveolar bone loss in a mouse model with ligature-induced periodontitis. To understand how MetS increases bone loss, we tested our hypothesis that palmitic acid (PA), a most abundant saturated fatty acid in the HFD, interacts with lipopolysaccharide (LPS) to promote osteoclastogenesis. METHODS We induced MetS by feeding mice HFD for 18 weeks and induced periodontitis with ligature placement. After treatments, we assessed alveolar bone loss using micro-computed tomography and determined osteoclastogenesis using tartrate-resistant acid phosphatase (TRAP) staining. To explore the mechanisms, we treated macrophages with PA, LPS or both and analyzed the osteoclast formation and cytokine expression in macrophages. RESULTS While ligature robustly induced periodontitis in mice with or without MetS, the mice with MetS had more bone loss than those without MetS. PA and LPS cooperatively induced osteoclast formation and stimulated the expression of inflammatory cytokines involved in osteoclastogenesis potentially via a FAT/CD36-dependent mechanism in macrophages. CONCLUSIONS HFD-induced MetS increases alveolar bone loss in mice with ligature-induced periodontitis, and PA and LPS cooperatively stimulate osteoclast formation and proinflammatory gene expression in macrophages.
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Affiliation(s)
- Zhongyang Lu
- Division of Endocrinology, Diabetes and Medical Genetics, Department of Medicine, College of Medicine, Medical University of South Carolina, Charleston, South Carolina, USA
| | - Yanchun Li
- Division of Endocrinology, Diabetes and Medical Genetics, Department of Medicine, College of Medicine, Medical University of South Carolina, Charleston, South Carolina, USA
| | - Hong Yu
- Department of Oral Health Sciences, College of Dental Medicine, Medical University of South Carolina, Charleston, South Carolina, USA
| | - Maria F Lopes-Virella
- Division of Endocrinology, Diabetes and Medical Genetics, Department of Medicine, College of Medicine, Medical University of South Carolina, Charleston, South Carolina, USA
- Ralph H. Johnson Veterans Affairs Medical Center, Charleston, South Carolina, USA
| | - Yan Huang
- Division of Endocrinology, Diabetes and Medical Genetics, Department of Medicine, College of Medicine, Medical University of South Carolina, Charleston, South Carolina, USA
- Ralph H. Johnson Veterans Affairs Medical Center, Charleston, South Carolina, USA
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Nagayama Y, Ebina K, Tsuboi H, Hirao M, Hashimoto J, Yoshikawa H, Okada S, Nakata K. Low serum albumin concentration is associated with increased risk of osteoporosis in postmenopausal patients with rheumatoid arthritis. J Orthop Sci 2022; 27:1283-1290. [PMID: 34696921 DOI: 10.1016/j.jos.2021.08.018] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Revised: 08/01/2021] [Accepted: 08/22/2021] [Indexed: 11/16/2022]
Abstract
BACKGROUND The risk of osteoporosis in patients with rheumatoid arthritis (RA) is frequently overlooked, and investigating a simple indicator in routine care may be beneficial to motivate osteoporosis examination. The aim of this retrospective, case-controlled study was to identify the correlation between serum albumin concentrations and the prevalence of osteoporosis in postmenopausal patients with RA. METHODS This study enrolled 197 patients who underwent dual-energy X-ray absorptiometry of lumbar spine (LS) and proximal femur without osteoporosis treatment [mean age, 67.5 years; disease duration, 12.8 years; Disease Activity Score assessing 28 joints with C-reactive protein, 2.0; prednisolone dose, 4.9 mg/day (usage, 42.6%); and LS T-score, -1.9]. Patients were classified into 2 groups: osteoporosis, defined as ≥ 1 part bone mineral density T-score ≤ -2.5 or history of fragility fracture of the vertebra or proximal femur (121 patients), and non-osteoporosis (76 patients). Groups were then matched by propensity score using clinical backgrounds affecting bone metabolism. RESULTS In non-matched model, serum albumin concentration was significantly associated with osteoporosis-related factors such as aging, inflammation, physical disability, and glucocorticoid dose. Multivariate logistic regression revealed that serum albumin concentration was independently and significantly associated with osteoporosis risk (odds ratio = 0.22, 95% confidence interval = 0.08, 0.61, p = 0.0033). After propensity score matching, 57 patients for each group showed that in addition to the LS and femoral neck T-scores (p < 0.001), serum albumin concentrations (p = 0.01) remained lower in the osteoporosis group compared to non-osteoporosis group. Receiver operating characteristic curve analysis in non-matched model revealed that when cut-off value of serum albumin concentration for indicating osteoporosis was set at 4.2 g/dl, the area under the curve was 0.69, sensitivity 0.74, and specificity 0.58. CONCLUSIONS Low serum albumin concentration was significantly and independently associated with the prevalence of osteoporosis, which may be considered as one of the osteoporosis-related factors in postmenopausal patients with RA.
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Affiliation(s)
- Yoshio Nagayama
- Nagayama Rheumatology and Orthopaedic Clinic, 4-3-25 Hiokisounishi-machi, Higashi-ku, Sakai, 599-8114, Japan
| | - Kosuke Ebina
- Department of Musculoskeletal Regenerative Medicine, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan.
| | - Hideki Tsuboi
- Department of Orthopaedic Surgery, Osaka Rosai Hospital, 1179-3 Nagasone-cho, Kita-ku, Sakai, 591-8025, Japan
| | - Makoto Hirao
- Department of Orthopaedic Surgery, Osaka University Graduate School of Medicine, 2-2 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - Jun Hashimoto
- Department of Rheumatology, National Hospital Organization Osaka Minami Medical Center, 2-1 Kidohigashi, Kawachinagano, Osaka, 586-8521, Japan
| | - Hideki Yoshikawa
- Department of Orthopaedic Surgery, Toyonaka Municipal Hospital, 4-14-1 Shibahara-cho, Toyonaka, Osaka, 560-8565, Japan
| | - Seiji Okada
- Department of Orthopaedic Surgery, Osaka University Graduate School of Medicine, 2-2 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - Ken Nakata
- Department of Health and Sport Sciences, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka, 565-0871, Japan
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Sakthiswary R, Uma Veshaaliini R, Chin KY, Das S, Sirasanagandla SR. Pathomechanisms of bone loss in rheumatoid arthritis. Front Med (Lausanne) 2022; 9:962969. [PMID: 36059831 PMCID: PMC9428319 DOI: 10.3389/fmed.2022.962969] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Accepted: 08/01/2022] [Indexed: 12/18/2022] Open
Abstract
Rheumatoid arthritis (RA) is an autoimmune disease, in which the inflammatory processes involve the skeletal system and there is marked destruction of the bones and the surrounding structures. In this review, we discuss the current concepts of osteoimmunology in RA, which represent the molecular crosstalk between the immune and skeletal systems, resulting in the disruption of bone remodeling. Bone loss in RA can be focal or generalized, leading to secondary osteoporosis. We have summarized the recent studies of bone loss in RA, which focused on the molecular aspects, such as cytokines, autoantibodies, receptor activator of nuclear kappa-β ligand (RANKL) and osteoprotegerin (OPG). Apart from the above molecules, the role of aryl hydrocarbon receptor (Ahr), which is a potential key mediator in this process through the generation of the Th17 cells, is discussed. Hence, this review highlights the key insights into molecular mechanisms of bone loss in RA.
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Affiliation(s)
- Rajalingham Sakthiswary
- Department of Medicine, Universiti Kebangsaan Malaysia Medical Centre, Kuala Lumpur, Malaysia
- *Correspondence: Rajalingham Sakthiswary
| | | | - Kok-Yong Chin
- Department of Pharmacology, Universiti Kebangsaan Malaysia Medical Centre, Kuala Lumpur, Malaysia
| | - Srijit Das
- Department of Human and Clinical Anatomy College of Medicine and Health Sciences Sultan Qaboos University, Muscat, Oman
| | - Srinivasa Rao Sirasanagandla
- Department of Human and Clinical Anatomy College of Medicine and Health Sciences Sultan Qaboos University, Muscat, Oman
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Harpagoside attenuates local bone Erosion and systemic osteoporosis in collagen-induced arthritis in mice. BMC Complement Med Ther 2022; 22:214. [PMID: 35948905 PMCID: PMC9364518 DOI: 10.1186/s12906-022-03694-y] [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: 03/08/2022] [Accepted: 08/01/2022] [Indexed: 11/10/2022] Open
Abstract
Background Rheumatoid arthritis (RA) is a chronic inflammatory autoimmune disease that causes local bone erosion and systemic osteoporosis. Harpagoside (HAR), an iridoid glycoside, has various pharmacological effects on pain, arthritis, and inflammation. Our previous study suggests that HAR is more deeply involved in the mechanism of bone loss caused by inflammatory stimuli than hormonal changes. Here, we identified the local and systemic bone loss inhibitory effects of HAR on RA and its intracellular mechanisms using a type 2 collagen-induced arthritis (CIA) mouse model. Methods The anti-osteoporosis and anti-arthritic effects of HAR were evaluated on bone marrow macrophage in vitro and CIA in mice in vivo by obtaining clinical scores, measuring hind paw thickness and inflammatory cytokine levels, micro-CT and histopathological assessments, and cell-based assay. Results HAR markedly reduced the clinical score and incidence rate of CIA in both the prevention and therapy groups. Histological analysis demonstrated that HAR locally ameliorated the destruction of bone and cartilage and the formation of pannus. In this process, HAR decreased the expression of inflammatory cytokines, such as tumor necrosis factor-α, interleukin (IL)-6, and IL-1β in the serum of CIA mice. Additionally, HAR downregulated the expression of receptor activator of nuclear factor-κB ligand and upregulated that of osteoprotegerin. HAR suppressed systemic bone loss by inhibiting osteoclast differentiation and osteoclast marker gene expression in a CIA mouse model. Conclusions Taken together, these findings show the beneficial effect of HAR on local symptoms and systemic bone erosion triggered by inflammatory arthritis. Supplementary Information The online version contains supplementary material available at 10.1186/s12906-022-03694-y.
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Dynamic changes in O-GlcNAcylation regulate osteoclast differentiation and bone loss via nucleoporin 153. Bone Res 2022; 10:51. [PMID: 35879285 PMCID: PMC9314416 DOI: 10.1038/s41413-022-00218-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Revised: 01/25/2022] [Accepted: 02/28/2022] [Indexed: 11/08/2022] Open
Abstract
Bone mass is maintained by the balance between osteoclast-induced bone resorption and osteoblast-triggered bone formation. In inflammatory arthritis such as rheumatoid arthritis (RA), however, increased osteoclast differentiation and activity skew this balance resulting in progressive bone loss. O-GlcNAcylation is a posttranslational modification with attachment of a single O-linked β-D-N-acetylglucosamine (O-GlcNAc) residue to serine or threonine residues of target proteins. Although O-GlcNAcylation is one of the most common protein modifications, its role in bone homeostasis has not been systematically investigated. We demonstrate that dynamic changes in O-GlcNAcylation are required for osteoclastogenesis. Increased O-GlcNAcylation promotes osteoclast differentiation during the early stages, whereas its downregulation is required for osteoclast maturation. At the molecular level, O-GlcNAcylation affects several pathways including oxidative phosphorylation and cell-cell fusion. TNFα fosters the dynamic regulation of O-GlcNAcylation to promote osteoclastogenesis in inflammatory arthritis. Targeted pharmaceutical or genetic inhibition of O-GlcNAc transferase (OGT) or O-GlcNAcase (OGA) arrests osteoclast differentiation during early stages of differentiation and during later maturation, respectively, and ameliorates bone loss in experimental arthritis. Knockdown of NUP153, an O-GlcNAcylation target, has similar effects as OGT inhibition and inhibits osteoclastogenesis. These findings highlight an important role of O-GlcNAcylation in osteoclastogenesis and may offer the potential to therapeutically interfere with pathologic bone resorption.
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Meroni G, Tsikopoulos A, Tsikopoulos K, Allemanno F, Martino PA, Soares Filipe JF. A Journey into Animal Models of Human Osteomyelitis: A Review. Microorganisms 2022; 10:microorganisms10061135. [PMID: 35744653 PMCID: PMC9228829 DOI: 10.3390/microorganisms10061135] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Revised: 05/28/2022] [Accepted: 05/30/2022] [Indexed: 12/24/2022] Open
Abstract
Osteomyelitis is an infection of the bone characterized by progressive inflammatory destruction and apposition of new bone that can spread via the hematogenous route (hematogenous osteomyelitis (HO)), contiguous spread (contiguous osteomyelitis (CO)), and direct inoculation (osteomyelitis associated with peripheral vascular insufficiency (PVI)). Given the significant financial burden posed by osteomyelitis patient management, the development of new preventive and treatment methods is warranted. To achieve this objective, implementing animal models (AMs) of infection such as rats, mice, rabbits, avians, dogs, sheep, goats, and pigs might be of the essence. This review provides a literature analysis of the AMs developed and used to study osteomyelitis. Historical relevance and clinical applicability were taken into account to choose the best AMs, and some study methods are briefly described. Furthermore, the most significant strengths and limitations of each species as AM are discussed, as no single model incorporates all features of osteomyelitis. HO’s clinical manifestation results in extreme variability between patients due to multiple variables (e.g., age, sex, route of infection, anatomical location, and concomitant diseases) that could alter clinical studies. However, these variables can be controlled and tested through different animal models.
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Affiliation(s)
- Gabriele Meroni
- One Health Unit, Department of Biomedical, Surgical, and Dental Sciences, University of Milan, Via Pascal 36, 20133 Milan, Italy; (F.A.); (P.A.M.)
- Correspondence: ; Tel.: +39-3428-262-125
| | - Alexios Tsikopoulos
- Department of Pharmacology, School of Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, 541 24 Thessaloniki, Greece;
| | | | - Francesca Allemanno
- One Health Unit, Department of Biomedical, Surgical, and Dental Sciences, University of Milan, Via Pascal 36, 20133 Milan, Italy; (F.A.); (P.A.M.)
| | - Piera Anna Martino
- One Health Unit, Department of Biomedical, Surgical, and Dental Sciences, University of Milan, Via Pascal 36, 20133 Milan, Italy; (F.A.); (P.A.M.)
| | - Joel Fernando Soares Filipe
- Department of Veterinary Medicine and Animal Sciences, University of Milan, Via dell’Università 6, 26900 Lodi, Italy;
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Pagel CN, Kularathna PK, Sanaei R, Young ND, Hooper JD, Mackie EJ. Protease-activated receptor-2 dependent and independent responses of bone cells to prostate cancer cell secretory products. Prostate 2022; 82:723-739. [PMID: 35167724 DOI: 10.1002/pros.24316] [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: 04/14/2021] [Revised: 08/25/2021] [Accepted: 09/27/2021] [Indexed: 11/09/2022]
Abstract
BACKGROUND Metastatic prostate cancer lesions in the skeleton are frequently characterized by excessive formation of bone. Prostate cancer cells secrete factors, including serine proteases, that are capable of influencing the behavior of surrounding cells. Some of these proteases activate protease-activated receptor-2 (PAR2 ), which is expressed by osteoblasts (bone-forming cells) and precursors of osteoclasts (bone-resorbing cells). The aim of the current study was to investigate a possible role for PAR2 in regulating the behavior of bone cells exposed to metastatic prostate cancer cells. METHODS The effect of medium conditioned by the PC3, DU145, and MDA-PCa-2b prostate cancer cell lines was investigated in assays of bone cell function using cells isolated from wildtype and PAR2 -null mice. Osteoclast differentiation was assessed by counting tartrate-resistant acid phosphatase-positive multinucleate cells in bone marrow cultured in osteoclastogenic medium. Osteoblasts were isolated from calvariae of neonatal mice, and BrdU incorporation was used to assess their proliferation. Assays of alkaline phosphatase activity and quantitative PCR analysis of osteoblastic gene expression were used to assess osteoblast differentiation. Responses of osteoblasts to medium conditioned by MDA-PCa-2b cells were analyzed by RNAseq. RESULTS Conditioned medium (CM) from all three cell lines inhibited osteoclast differentiation independently of PAR2 . Media from PC3 and DU145 cells had no effect on assays of osteoblast function. Medium conditioned by MDA-PCa-2b cells stimulated BrdU incorporation in both wildtype and PAR2 -null osteoblasts but increased alkaline phosphatase activity and Runx2 and Col1a1 expression in wildtype but not PAR2 -null cells. Functional enrichment analysis of RNAseq data identified enrichment of multiple gene ontology terms associated with lysosomal function in both wildtype and PAR2 -null cells in response to MDA-PCa-2b-CM. Analysis of individual genes identified osteogenesis-associated genes that were either upregulated by MDA-PCa-2b-CM selectively in wildtype cells or downregulated selectively in PAR2 -null cells. CONCLUSIONS Factors secreted by prostate cancer cells influence bone cell behavior through both PAR2 -dependent and -independent mechanisms. Both PAR2 -independent suppression of osteoclast differentiation and PAR2 -dependent stimulation of osteogenesis are likely to determine the nature of prostate cancer metastases in bone.
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Affiliation(s)
- Charles N Pagel
- Department of Veterinary Biosciences, Melbourne Veterinary School, Faculty of Veterinary and Agricultural Sciences, University of Melbourne, Parkville, Victoria, Australia
| | - Pamu K Kularathna
- Department of Veterinary Biosciences, Melbourne Veterinary School, Faculty of Veterinary and Agricultural Sciences, University of Melbourne, Parkville, Victoria, Australia
| | - Reza Sanaei
- Department of Veterinary Biosciences, Melbourne Veterinary School, Faculty of Veterinary and Agricultural Sciences, University of Melbourne, Parkville, Victoria, Australia
| | - Neil D Young
- Department of Veterinary Biosciences, Melbourne Veterinary School, Faculty of Veterinary and Agricultural Sciences, University of Melbourne, Parkville, Victoria, Australia
| | - John D Hooper
- Mater Research Institute, Translational Research Institute, University of Queensland, Woolloongabba, Queensland, Australia
| | - Eleanor J Mackie
- Department of Veterinary Biosciences, Melbourne Veterinary School, Faculty of Veterinary and Agricultural Sciences, University of Melbourne, Parkville, Victoria, Australia
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12
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Kim GM, Park H, Lee SY. Roles of osteoclast-associated receptor in rheumatoid arthritis and osteoarthritis. Joint Bone Spine 2022; 89:105400. [DOI: 10.1016/j.jbspin.2022.105400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Revised: 04/03/2022] [Accepted: 04/12/2022] [Indexed: 10/18/2022]
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13
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Medication-Related Osteonecrosis of the Jaw Associated in a Patient Treated With Etanercept. J Craniofac Surg 2022; 33:e694-e696. [PMID: 35184115 DOI: 10.1097/scs.0000000000008588] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Accepted: 01/31/2022] [Indexed: 11/27/2022] Open
Abstract
ABSTRACT Medication-related osteonecrosis of the jaws (MRONJ) is defined as a pathologic condition affecting the maxillary and mandibular bones arising subsequently to pharmacological treatment with antiresorptive and antiangiogenic drugs.In this case report, the occurrence of MRONJ is described in a 66-year-old female patient affected by rheumatoid arthritis and treated with Etanercept, a Tumor Necrosis Factor (TNF)-α inhibitor. The patient developed a mandibular MRONJ following the extraction of teeth 3.4 and 3.5. The patient was then treated with conservative surgery of the necrotic bone. At 12-month follow-up complete resolution was observed. According to the data presented, the evaluation of the effects of new immunosuppressive biological therapies on the oral cavity appears of utmost importance in preventing the development of MRONJ. Although the risk related to TNF-α inhibitors has not been quantified yet, the clinician should be aware of the potential adverse effects on the oral cavity.
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14
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Ren J, Lu X, Hall G, Privratsky JR, Robson MJ, Blakely RD, Crowley SD. IL-1 receptor signaling in podocytes limits susceptibility to glomerular damage. Am J Physiol Renal Physiol 2022; 322:F164-F174. [PMID: 34894725 PMCID: PMC8782651 DOI: 10.1152/ajprenal.00353.2021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Revised: 11/22/2021] [Accepted: 12/07/2021] [Indexed: 02/03/2023] Open
Abstract
Interleukin (IL)-1 receptor type 1 (IL-1R1) activation triggers a proinflammatory signaling cascade that can exacerbate kidney injury. However, the functions of podocyte IL-1R1 in glomerular disease remain unclear. To study the role of IL-1R1 signaling in podocytes, we selectively ablated podocyte IL-1R1 in mice (PKO mice). We then subjected PKO mice and wild-type controls to two glomerular injury models: nephrotoxic serum (NTS)- and adriamycin-induced nephropathy. Surprisingly, we found that IL-1R1 activation in podocytes limited albuminuria and podocyte injury during NTS- and adriamycin-induced nephropathy. Moreover, deletion of IL-1R1 in podocytes drove podocyte apoptosis and glomerular injury through diminishing Akt activation. Activation of Akt signaling abrogated the differences in albuminuria and podocyte injury between wild-type and PKO mice during NTS. Thus, IL-1R1 signaling in podocytes limits susceptibility to glomerular injury via an Akt-dependent signaling pathway. These data identify an unexpected protective role for IL-1R1 signaling in podocytes in the pathogenesis of glomerular disease.NEW & NOTEWORTHY The present study establishes that activation of the receptor for interleukin-1 limits susceptibility to damage to the kidney glomerulus in preclinical mouse models by stimulating Akt signaling cascades inside the podocyte.
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Affiliation(s)
- Jiafa Ren
- Division of Nephrology, Department of Medicine, Durham Veterans Affairs and Duke University Medical Centers, Durham, North Carolina
- Department of Nephrology, The First Affiliated Hospital of Nanjing Medical University, Nanjing Medical University, Nanjing, People's Republic of China
| | - Xiaohan Lu
- Division of Nephrology, Department of Medicine, Durham Veterans Affairs and Duke University Medical Centers, Durham, North Carolina
| | - Gentzon Hall
- Division of Nephrology, Department of Medicine, Durham Veterans Affairs and Duke University Medical Centers, Durham, North Carolina
| | - Jamie R Privratsky
- Department of Anesthesiology, Durham Veterans Affairs and Duke University Medical Centers, Durham, North Carolina
| | - Matthew J Robson
- Division of Pharmaceutical Sciences, James L. Winkle College of Pharmacy, University of Cincinnati, Cincinnati, Ohio
| | - Randy D Blakely
- Department of Biomedical Science, Charles E. Schmidt College of Medicine and FAU Brain Institute, Jupiter, Florida
| | - Steven D Crowley
- Division of Nephrology, Department of Medicine, Durham Veterans Affairs and Duke University Medical Centers, Durham, North Carolina
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15
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Yang W, He Q, Hu Z, Xie X. FOXO4 May Be a Biomarker of Postmenopausal Osteoporosis. Int J Gen Med 2022; 15:749-762. [PMID: 35082523 PMCID: PMC8786351 DOI: 10.2147/ijgm.s347416] [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: 11/09/2021] [Accepted: 01/06/2022] [Indexed: 11/23/2022] Open
Abstract
Purpose Postmenopausal osteoporosis (PMOP) is a common and debilitating chronic disease, but it has just no cure options. The objective of this study was to identify genes associated with osteoporosis and reveal potential therapeutic targets. Methods Expression profiles from GSE13850 and GSE56815 datasets were combined for differential expression analysis. Extraction of intersecting genes from the combined datasets and the differentially expressed genes in GSE56814 were performed to construct a multi-scale embedded gene co-expression network analysis (MEGENA) to obtain module genes. Module genes with an area under the receiver operating characteristic curve (AUC) >0.60 were chosen to construct the least absolute shrinkage and selection operator (LASSO) model to obtain feature genes. A regulated network was constructed using differentially expressed micro-RNAs (miRNAs) in GSE74209 and feature genes. Finally, key genetic pathways and pathways of the Kyoto Encyclopedia of Genes and Genomes were identified and explored. Results The commonly identified differentially expressed genes involve oxidative phosphorylation and caffeine metabolism. We identified 66 modules with 2354 module genes based on MEGENA. CARD8, FOXO4, IL1R2, MPHOSPH6, MPRIP, MYOM1, PRR5L and YIPF4 were identified as feature genes by the LASSO model. Furthermore, predicted miRNA target genes included 8 genes associated with PMOP. The largest AUC was observed for FOXO4, which was found at the nexus of feature genes and miRNA-regulated genes and which correlated with the upregulation of dendritic cells. Moreover, FOXO4 was found to be involved in ABC transporters, as well as cocaine and nicotine addiction. Conclusion FOXO4 may serve as potential biomarker and therapeutic target for PMOP.
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Affiliation(s)
- Weiwei Yang
- Department of Gynecology, The Fourth Affiliated Hospital of Guangxi Medical University, Liuzhou, Guangxi, 545005, People’s Republic of China
| | - Qing He
- Department of Orthopedics, The Fourth Affiliated Hospital of Guangxi Medical University, Liuzhou, Guangxi, 545005, People’s Republic of China
| | - Zhaohui Hu
- Department of Orthopedics, Liuzhou People’s Hospital, Liuzhou, Guangxi, 545005, People’s Republic of China
- Correspondence: Zhaohui Hu, Liuzhou People’s Hospital, No. 8 Wenchang Road, Liuzhou, Guangxi, 545006, People’s Republic of China, Tel/Fax +867722662676, Email
| | - Xiangtao Xie
- Department of Orthopedics, The Fourth Affiliated Hospital of Guangxi Medical University, Liuzhou, Guangxi, 545005, People’s Republic of China
- Department of Orthopedics, Liuzhou Worker’s Hospital, Liuzhou, Guangxi, 545005, People’s Republic of China
- Xiangtao Xie, The Fourth Affiliated Hospital of Guangxi Medical University, No. 156 Heping Road, Liuzhou, Guangxi, 545027, People’s Republic of China, Tel +867723832719 Email
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16
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King S, Klineberg I, Brennan-Speranza TC. Adipose Tissue Dysfunction: Impact on Bone and Osseointegration. Calcif Tissue Int 2022; 110:32-40. [PMID: 34374815 DOI: 10.1007/s00223-021-00899-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Accepted: 07/30/2021] [Indexed: 10/20/2022]
Abstract
Bone metabolism may be adversely affected in metabolic diseases such as obesity and metabolic syndrome, which are characterised by weight gain, due to the expansion of adipose tissue deposits. As an important regulator of energy metabolism, adipose tissues synthesise and secrete several key regulatory adipokines that influence a range of metabolic functions. This narrative review outlines the evidence for the mechanisms by which adipose tissue dysfunction may alter bone metabolism prior to the development of frank hyperglycaemia and presents the emerging evidence for the impact of diet-induced expansion of adipose tissue on implant osseointegration. Successful osseointegration requires normal bone cell function, and the expansion of adipose tissue deposits results in dysregulated adipokine production favouring an increase in pro-inflammatory adipokines, contributing to the development of a chronic inflammatory state and insulin resistance. The increase in inflammatory cytokines promotes the growth and differentiation of osteoclasts indirectly through the modulation of osteoblastic RANKL production and directly by reducing osteoclast apoptosis and increased osteoclastic expression of RANK. Conversely, the suppression of osteoblastic regulatory genes results in reduced osteoblast numbers and function contributing to compromised bone turnover. Compromised osseointegration has been established in hyperglycaemia; however, as discussed in this review, it may not be the only driver of altered bone metabolism. The incidence of metabolic disease in the community is rising, patients may present for implant treatment with undiagnosed, underlying changes to bone cell metabolism due to adipose tissue dysmetabolism.
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Affiliation(s)
- Shalinie King
- Sydney Dental School and Westmead Applied Research Centre, Faculty of Medicine and Health, The University of Sydney, Sydney, Australia.
| | - Iven Klineberg
- Sydney Dental School, Faculty of Medicine and Health, The University of Sydney, Sydney, Australia
| | - Tara C Brennan-Speranza
- Head Skeletal Endocrine Laboratory, School of Medical Sciences and School of Public Health, Faculty of Medicine and Health, University of Sydney, Sydney, Australia
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17
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Li N, Fu L, Li Z, Ke Y, Wang Y, Wu J, Yu J. The Role of Immune Microenvironment in Maxillofacial Bone Homeostasis. FRONTIERS IN DENTAL MEDICINE 2021. [DOI: 10.3389/fdmed.2021.780973] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Maxillofacial bone defects are common medical problems caused by congenital defects, necrosis, trauma, tumor, inflammation, and fractures non-union. Maxillofacial bone defects often need bone graft, which has many difficulties, such as limited autogenous bone supply and donor site morbidity. Bone tissue engineering is a promising strategy to overcome the above-mentioned problems. Osteoimmunology is the inter-discipline that focuses on the relationship between the skeletal and immune systems. The immune microenvironment plays a crucial role in bone healing, tissue repair and regeneration in maxillofacial region. Recent studies have revealed the vital role of immune microenvironment and bone homeostasis. In this study, we analyzed the complex interaction between immune microenvironment and bone regeneration process in oral and maxillofacial region, which will be important to improve the clinical outcome of the bone injury treatment.
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18
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Cicalău GIP, Babes PA, Calniceanu H, Popa A, Ciavoi G, Iova GM, Ganea M, Scrobotă I. Anti-Inflammatory and Antioxidant Properties of Carvacrol and Magnolol, in Periodontal Disease and Diabetes Mellitus. Molecules 2021; 26:6899. [PMID: 34833990 PMCID: PMC8623889 DOI: 10.3390/molecules26226899] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2021] [Revised: 11/03/2021] [Accepted: 11/13/2021] [Indexed: 12/15/2022] Open
Abstract
Periodontal disease and diabetes mellitus are two pathologies that are extremely widespread worldwide and share the feature of chronic inflammation. Carvacrol is a phenolic monoterpenoid, produced by a variety of herbs, the most well-known of which is Origanum vulgare. Magnolol is a traditional polyphenolic compound isolated from the stem bark of Magnolia officinalis, mainly used in Chinese medicine. The purpose of this paper is to review the therapeutic properties of these bioactive compounds, in the treatment of periodontitis and diabetes. Based on our search strategy we conducted a literature search in the PubMed and Google Scholar databases to identify studies. A total of one hundred eighty-four papers were included in the current review. The results show that carvacrol and magnolol have anti-inflammatory, antioxidant, antimicrobial, anti-osteoclastic, and anti-diabetic properties that benefit both pathologies. Knowledge of the multiple activities of carvacrol and magnolol can assist with the development of new treatment strategies, and the design of clinical animal and human trials will maximize the potential benefits of these extracts in subjects suffering from periodontitis or diabetes.
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Affiliation(s)
- Georgiana Ioana Potra Cicalău
- Doctoral School of Biomedical Science, University of Oradea, 1st University Street, 410087 Oradea, Romania;
- Department of Dental Medicine, Faculty of Medicine and Pharmacy, University of Oradea, 1st Decembrie Street, 410073 Oradea, Romania; (G.C.); (G.M.I.); (I.S.)
| | - Petru Aurel Babes
- Doctoral School of Biomedical Science, University of Oradea, 1st University Street, 410087 Oradea, Romania;
| | - Horia Calniceanu
- Department of Periodontology, Faculty of Dental Medicine, Victor Babes University of Medicine and Pharmacy, 300041 Timisoara, Romania
- Periodontal and Periimplant Diseases Research Center “Prof. Dr. Anton Sculean”, Faculty of Dental Medicine, Victor Babes University of Medicine and Pharmacy, 300041 Timisoara, Romania
| | - Adelina Popa
- Department of Orthodontics, Victor Babes University of Medicine and Pharmacy, 300041 Timisoara, Romania
- Orthodontic Research Center (ORTHO-CENTER), Faculty of Dental Medicine, Victor Babes University of Medicine and Pharmacy, 300041 Timisoara, Romania
| | - Gabriela Ciavoi
- Department of Dental Medicine, Faculty of Medicine and Pharmacy, University of Oradea, 1st Decembrie Street, 410073 Oradea, Romania; (G.C.); (G.M.I.); (I.S.)
| | - Gilda Mihaela Iova
- Department of Dental Medicine, Faculty of Medicine and Pharmacy, University of Oradea, 1st Decembrie Street, 410073 Oradea, Romania; (G.C.); (G.M.I.); (I.S.)
| | - Mariana Ganea
- Department of Pharmacy, Faculty of Medicine and Pharmacy, University of Oradea, 1st Decembrie Street, 410073 Oradea, Romania;
| | - Ioana Scrobotă
- Department of Dental Medicine, Faculty of Medicine and Pharmacy, University of Oradea, 1st Decembrie Street, 410073 Oradea, Romania; (G.C.); (G.M.I.); (I.S.)
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19
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Fathollahi A, Samimi LN, Akhlaghi M, Jamshidi A, Mahmoudi M, Farhadi E. The role of NK cells in rheumatoid arthritis. Inflamm Res 2021; 70:1063-1073. [PMID: 34580740 DOI: 10.1007/s00011-021-01504-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 08/11/2021] [Accepted: 09/13/2021] [Indexed: 01/17/2023] Open
Abstract
OBJECTIVE Natural killer (NK) cells are part of the innate immune system which not only provides a primary response to pathogenic conditions but can also play an important regulatory role in immune responses. Furthermore, these cells can influence immune responses by affecting other involved cells. Human NK cells can be classified as CD56dim and CD56bright; the former demonstrates mostly cytotoxic effects, while the latter comprises mostly tolerant or regulatory NK cells. These cells participate in the immunopathogenesis of rheumatoid arthritis (RA) and their role remains still unclear. METHODS We searched PubMed/MEDLINE and Scopus databases to review and analyze relevant literature on the impact of NK cells in the pathogenesis of RA. RESULTS Although the percentage of NK cells increases in peripheral blood of RA patients compared to healthy individuals, the cytotoxic function of these cells is impaired. It is demonstrated by reduced "perforin+ NK cells" and decreased per-cell lytic function. These cytotoxic NK cells may control the pathogenic bone absorptive function of osteoclasts by directly targeting these cells. CONCLUSION Collectively, the evidence collected in the current review emphasizes the possible protective role of CD56dim NK cells in the pathogenesis of RA.
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Affiliation(s)
- Anwar Fathollahi
- Department of Immunology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Leila Nejatbakhsh Samimi
- Rheumatology Research Center, Shariati Hospital, Tehran University of Medical Sciences, Kargar Ave., Tehran, Iran
| | - Maassoumeh Akhlaghi
- Rheumatology Research Center, Shariati Hospital, Tehran University of Medical Sciences, Kargar Ave., Tehran, Iran.,Inflammation Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Ahmadreza Jamshidi
- Rheumatology Research Center, Shariati Hospital, Tehran University of Medical Sciences, Kargar Ave., Tehran, Iran
| | - Mahdi Mahmoudi
- Rheumatology Research Center, Shariati Hospital, Tehran University of Medical Sciences, Kargar Ave., Tehran, Iran.,Inflammation Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Elham Farhadi
- Rheumatology Research Center, Shariati Hospital, Tehran University of Medical Sciences, Kargar Ave., Tehran, Iran. .,Inflammation Research Center, Tehran University of Medical Sciences, Tehran, Iran.
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20
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IL-3 inhibits rat osteoclast differentiation induced by TNF-α and other pro-osteoclastogenic cytokines. J Biosci 2021. [DOI: 10.1007/s12038-021-00181-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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21
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Uesato N, Inagaki K, Miyagawa N, Kitagawa Y, Kakefuda R, Matsuo Y, Yamaguchi T, Hata T, Ikegashira K, Matsushita M. JTE-952 Suppresses Bone Destruction in Collagen-Induced Arthritis in Mice by Inhibiting Colony Stimulating Factor 1 Receptor. Biol Pharm Bull 2021; 43:1884-1892. [PMID: 33268706 DOI: 10.1248/bpb.b20-00517] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Rheumatoid arthritis (RA) is a chronic autoimmune disease characterized by synovial inflammation and structural destruction of the joints. Bone damage occurs in an early stage after onset and osteoclast activation plays a substantial role in its progression. Colony stimulating factor 1 receptor (CSF1R) is a receptor protein tyrosine kinase specifically expressed in monocytic-lineage cells such as macrophages and osteoclasts. Here, we investigated the effect of JTE-952, a novel CSF1R tyrosine kinase inhibitor, on osteoclast formation in vitro and on bone destruction in a mouse model of collagen-induced arthritis. JTE-952 completely inhibited osteoclast differentiation from human monocytes, with an IC50 of 2.8 nmol/L, and reduced osteoclast formation from the synovial cells of RA patients. Detectable levels of colony stimulating factor 1 (CSF1), a ligand of CSF1R, were observed in the synovial tissues of the arthritis model, similar to those observed in the pathology of human RA. JTE-952 significantly suppressed increases in the bone destruction score, the number of tartrate-resistant-acid-phosphatase-positive cells, and the severity of arthritis in the model mice. We also examined the efficacy of JTE-952 combined with methotrexate. This combination therapy more effectively reduced the severity of bone destruction and arthritis than monotherapy with either agent alone. In summary, JTE-952 potently inhibited human osteoclast formation in vitro and suppressed bone destruction in an experimental arthritis model, especially when combined with methotrexate. These results indicate that JTE-952 should strongly inhibit bone destruction and joint inflammation in RA patients and effectively prevent the progression of the structural destruction of joints.
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Affiliation(s)
- Naofumi Uesato
- Central Pharmaceutical Research Institute, Japan Tobacco Inc
| | - Koji Inagaki
- Central Pharmaceutical Research Institute, Japan Tobacco Inc
| | - Naoki Miyagawa
- Central Pharmaceutical Research Institute, Japan Tobacco Inc
| | | | - Reina Kakefuda
- Central Pharmaceutical Research Institute, Japan Tobacco Inc
| | - Yushi Matsuo
- Central Pharmaceutical Research Institute, Japan Tobacco Inc
| | | | - Takahiro Hata
- Central Pharmaceutical Research Institute, Japan Tobacco Inc
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22
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Li CH, Palanisamy K, Li X, Yu SH, Wang IK, Li CY, Sun KT. Exosomal tumor necrosis factor-α from hepatocellular cancer cells (Huh-7) promote osteoclast differentiation. J Cell Biochem 2021; 122:1749-1760. [PMID: 34383347 DOI: 10.1002/jcb.30127] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Revised: 07/26/2021] [Accepted: 07/29/2021] [Indexed: 12/28/2022]
Abstract
Bone is the common extra-hepatic site for cancer metastasis. Hepatic cancer is associated with a higher incidence of pathological fracture. However, this important regulatory mechanism remains unexplored. Thus, exosome-mediated cell-cell communication between hepatocellular cancer and bone might be key to osteolytic bone destruction. Huh-7 exosomes were characterized for size and exosome marker expressions (CD63, Alix). Exosome mediated osteoclast differentiation in the RAW 264.7 cells was monitored from day 1 to 6 and multinucleated osteoclast formation and bone resorption activity were analyzed. The osteoclastogenic factor expressions in the exosomes and osteoclast differentiation markers such as tumor necrosis factor receptor 6 (TRAF6), nuclear factor κB (NF-κB), nuclear factor of activated T-cells, cytoplasmic 1 (NFATc1), and cathepsin K (CTSK) were analyzed using western blot. Exosomes released by liver cancer cells (Huh-7) promoted osteoclast differentiation in RAW 264.7 cells. Analysis of osteoclastogenic factors in the exosomes showed that exosomes were specifically enriched with tumor necrosis factor α (TNF-α). Huh-7 exosomes promoted osteoclast differentiation by significantly increasing the number of TRAP-positive multi nucleated osteoclasts and resorption pits. Importantly, exosomes upregulated osteoclast markers TRAF6, NF-κB, and CTSK expressions. Further, neutralizing exosomal TNF-α reverted exosome-mediated osteoclast differentiation in RAW 264.7 cells. Collectively, our findings show that cellular communication of exosomal TNF-α from hepatocellular cancer cells (Huh-7) regulates osteoclast differentiation through NF-κB/CTSK/TRAP expressions. Thus, exosomal TNF-α might act as an important therapeutic target to prevent hepatocellular cancer mediated pathological bone disease.
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Affiliation(s)
- Ching-Hao Li
- Graduate Institute of Biomedical Sciences, China Medical University, Taichung, Taiwan
| | - Kalaiselvi Palanisamy
- Graduate Institute of Biomedical Sciences, China Medical University, Taichung, Taiwan
| | - Xin Li
- Graduate Institute of Biomedical Sciences, China Medical University, Taichung, Taiwan
| | - Shao-Hua Yu
- Graduate Institute of Biomedical Sciences, China Medical University, Taichung, Taiwan.,Department of Emergency Medicine, China Medical University Hospital, Taichung, Taiwan
| | - I-Kuan Wang
- Graduate Institute of Biomedical Sciences, China Medical University, Taichung, Taiwan.,Division of Nephrology, China Medical University Hospital, Taichung, Taiwan.,Department of Internal Medicine, China Medical University, Taichung, Taiwan
| | - Chi-Yuan Li
- Graduate Institute of Biomedical Sciences, China Medical University, Taichung, Taiwan.,Department of Anesthesiology, China Medical University Hospital, Taichung, Taiwan
| | - Kuo-Ting Sun
- Department of Pediatric Dentistry, China Medical University Hospital, Taichung, Taiwan.,School of Dentistry, China Medical University, Taichung, Taiwan
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23
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Qamar N, John P, Bhatti A. Emerging role of selenium in treatment of rheumatoid arthritis: An insight on its antioxidant properties. J Trace Elem Med Biol 2021; 66:126737. [PMID: 33740479 DOI: 10.1016/j.jtemb.2021.126737] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Revised: 01/21/2021] [Accepted: 03/02/2021] [Indexed: 10/22/2022]
Abstract
Rheumatoid Arthritis is an inflammatory disease primarily involves the inflamed synovium, affecting about 0.5-1 % population worldwide. It is the assumption from many years that oxidative stress is involved in the pathophysiology of inflammatory disorders like RA and many others. The significance of micronutrients in arthritis is linked to their role as a cofactor for the activation of selenoenzymes. Dietary interventions can manage the clinical symptoms of RA like pain, swelling and tenderness of joints and their associated disability along the progression of disease. This review highlights the antioxidant potential of selenium in treatment of RA along with the scientific evidence that Se supplementation can reduce disease progression by managing its clinical symptoms.
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Affiliation(s)
- Naila Qamar
- Atta-ur-Rahman School of Applied Biosciences, National University of Sciences and Technology (NUST), Sector H-12, Islamabad, 44000, Pakistan
| | - Peter John
- Atta-ur-Rahman School of Applied Biosciences, National University of Sciences and Technology (NUST), Sector H-12, Islamabad, 44000, Pakistan.
| | - Attya Bhatti
- Atta-ur-Rahman School of Applied Biosciences, National University of Sciences and Technology (NUST), Sector H-12, Islamabad, 44000, Pakistan
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24
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Zuo Y, Deng GM. Fc Gamma Receptors as Regulators of Bone Destruction in Inflammatory Arthritis. Front Immunol 2021; 12:688201. [PMID: 34248975 PMCID: PMC8262610 DOI: 10.3389/fimmu.2021.688201] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Accepted: 06/09/2021] [Indexed: 12/29/2022] Open
Abstract
Bone erosion is one of the primary features of inflammatory arthritis and is caused by excessive differentiation and activation of osteoclasts. Fc gamma receptors (FcγRs) have been implicated in osteoclastogenesis. Our recent studies demonstrate that joint-deposited lupus IgG inhibited RANKL-induced osteoclastogenesis. FcγRI is required for RANKL-induced osteoclastogenesis and lupus IgG-induced signaling transduction. We reviewed the results of studies that analyzed the association between FcγRs and bone erosion in inflammatory arthritis. The analysis revealed the dual roles of FcγRs in bone destruction in inflammatory arthritis. Thus, IgG/FcγR signaling molecules may serve as potential therapeutic targets against bone erosion.
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Affiliation(s)
- Yuyue Zuo
- Department of Rheumatology and Immunology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Guo-Min Deng
- Department of Rheumatology and Immunology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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25
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Tanaka Y, Soen S, Ishiguro N, Yamanaka H, Yoneda T, Tanaka S, Ohira T, Nitta T, Okubo N, Genant H, van der Heijde D, Takeuchi T. Identifying the preferable rheumatoid arthritis subgroups for intervention with the anti-RANKL antibody denosumab to reduce progression of joint destruction. RMD Open 2021; 6:rmdopen-2020-001249. [PMID: 32732353 PMCID: PMC7722273 DOI: 10.1136/rmdopen-2020-001249] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Revised: 06/06/2020] [Accepted: 06/25/2020] [Indexed: 12/14/2022] Open
Abstract
OBJECTIVES To clarify which rheumatoid arthritis (RA) patients benefit most from the anti-receptor activator of nuclear factor-κB ligand antibody denosumab to reduce the progression of joint destruction. METHODS We pooled patient data from the 12-month, double-blind, placebo-controlled DRIVE (phase II) and DESIRABLE (phase III) studies. In DRIVE, concomitant treatment was limited to methotrexate, salazosulfapyridine and bucillamine. In DESIRABLE, patients could receive any disease-modifying antirheumatic drug. RA patients were randomised to denosumab 60 mg every 6 months (Q6M), every 3 months (Q3M) or placebo. Efficacy was assessed by van der Heijde-modified total Sharp score (mTSS), bone erosion score (ES) and joint space narrowing score (JSNS). Change in mTSS was assessed in subgroups stratified by risk factors for radiographic damage if the interaction factor was significant. RESULTS The pooled analysis included 909 patients. Denosumab reduced worsening of mTSS (mean (SD)) at 12 months in the Q6M (0.88 (3.30), p=0.0024) and Q3M (0.66 (2.16), p=0.0002) groups versus placebo (1.50 (3.73)). This reduction in mTSS progression was due to the change in ES (Q6M, 0.44 (1.89), p=0.0006; Q3M, 0.20 (0.86), p<0.0001) versus placebo (0.98 (2.54)); no effect was observed on JSNS. Anti-cyclic citrullinated peptide (CCP) antibodies, glucocorticoid use and baseline ES showed a significant interaction. Denosumab was particularly effective in patients who were anti-CCP antibody positive (p<0.05). Changes in mTSS versus placebo were observed in all denosumab dose groups, regardless of glucocorticoid use and baseline ES. CONCLUSIONS Denosumab broadly reduced the progression of joint destruction in RA patients with risk factors for radiographic damage such as especially anti-CCP antibody positivity.
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Affiliation(s)
- Yoshiya Tanaka
- First Department of Internal Medicine, University of Occupational and Environmental Health, Japan, Kitakyushu, Japan
| | - Satoshi Soen
- Department of Orthopaedic Surgery and Rheumatology, Kindai University Nara Hospital, Ikoma, Japan
| | - Naoki Ishiguro
- Department of Orthopaedics, Nagoya University Graduate School of Medicine, Aichi, Japan
| | | | - Toshiyuki Yoneda
- Department of Biochemistry, Osaka University Graduate School of Dentistry, Osaka, Japan
| | - Sakae Tanaka
- Department of Orthopaedic Surgery, The University of Tokyo, Tokyo, Japan
| | - Takeshi Ohira
- Clinical Development Department, Daiichi Sankyo Co Ltd, Tokyo, Japan
| | - Takaya Nitta
- Clinical Development Department, Daiichi Sankyo Co Ltd, Tokyo, Japan
| | - Naoki Okubo
- Data Intelligence Department, Daiichi Sankyo Co Ltd, Tokyo, Japan
| | - Harry Genant
- Departments of Radiology, University of California San Francisco, California, USA
| | | | - Tsutomu Takeuchi
- Division of Rheumatology, Department of Internal Medicine, Keio University School of Medicine, Tokyo, Japan
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Zhao Z, Zhang Y, Wang C, Wang X, Wang Y, Zhang H. Angiotensin II upregulates RANKL/NFATC1 expression in synovial cells from patients with rheumatoid arthritis through the ERK1/2 and JNK pathways. J Orthop Surg Res 2021; 16:297. [PMID: 33952303 PMCID: PMC8097914 DOI: 10.1186/s13018-021-02451-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Accepted: 04/27/2021] [Indexed: 02/03/2023] Open
Abstract
Background Angiotensin II (Ang II) is associated with rheumatoid arthritis (RA) development. The present study investigated the impact of Ang II on the expression of receptor activator of nuclear factor-κB ligand (RANKL), as well as of nuclear factor of activated T cells cytoplasmic 1 (NFATC1) in RA synovial cells, and explored the underlying mechanism. Methods The expression levels of RANKL, NFATC1, and Ang II type 1 receptor (AT1R) were analyzed by RT PCR, western-blot, and/or immunohistochemistry. Western blot was also used to analyze the p38MAPK, JNK, and ERK1/2 pathways. Results The expressions of RANKL and NFATC1 increased in synovial tissues of RA compared to osteoarthritis (OA) synovial tissues. The expression of RANKL was upregulated by Ang II, and this effect was mitigated by an AT1R blocker but not by an AT2R blocker. Furthermore, Ang II activated the ERK1/2, JNK, and p38MAPK pathways, and this effect was blocked by the AT1R blocker. However, ERK1/2 and JNK inhibitors, but not a p38MAPK inhibitor, blocked Ang II-induced RANKL expression. Ang II also increased the level of NFATC1, and this upregulation was attenuated by AT1R blockade, ERK1/2 and JNK inhibition, and siRNA-mediated RANKL silencing, but not by AT2R blockade or p38MAPK inhibition. Conclusion Our results indicated that Ang II activated the ERK1/2 and JNK pathways via AT1R, thus upregulating RANKL and NFATC1 expressions in RA synovial cells.
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Affiliation(s)
- Zhiping Zhao
- Department of Joint Surgery, The Affiliated Hospital of Qingdao University, Qingdao, 266000, Shandong, China
| | - Yongtao Zhang
- Department of Joint Surgery, The Affiliated Hospital of Qingdao University, Qingdao, 266000, Shandong, China
| | - Changyao Wang
- Department of Joint Surgery, The Affiliated Hospital of Qingdao University, Qingdao, 266000, Shandong, China
| | - Xiangyu Wang
- Department of Joint Surgery, The Affiliated Hospital of Qingdao University, Qingdao, 266000, Shandong, China
| | - Yingzhen Wang
- Department of Joint Surgery, The Affiliated Hospital of Qingdao University, Qingdao, 266000, Shandong, China
| | - Haining Zhang
- Department of Joint Surgery, The Affiliated Hospital of Qingdao University, Qingdao, 266000, Shandong, China. .,Department of Orthopedics, The Affiliated Hospital of Qingdao University, 59 Hai Er Road, Qingdao, Shandong, 266061, P.R. China.
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Povoroznyuk VV, Dedukh NV, Bystrytska MA, Shapovalov VS. Bone remodeling stages under physiological conditions and glucocorticoid in excess: Focus on cellular and molecular mechanisms. REGULATORY MECHANISMS IN BIOSYSTEMS 2021. [DOI: 10.15421/022130] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
This review provides a rationale for the cellular and molecular mechanisms of bone remodeling stages under physiological conditions and glucocorticoids (GCs) in excess. Remodeling is a synchronous process involving bone resorption and formation, proceeding through stages of: (1) resting bone, (2) activation, (3) bone resorption, (4) reversal, (5) formation, (6) termination. Bone remodeling is strictly controlled by local and systemic regulatory signaling molecules. This review presents current data on the interaction of osteoclasts, osteoblasts and osteocytes in bone remodeling and defines the role of osteoprogenitor cells located above the resorption area in the form of canopies and populating resorption cavities. The signaling pathways of proliferation, differentiation, viability, and cell death during remodeling are presented. The study of signaling pathways is critical to understanding bone remodeling under normal and pathological conditions. The main signaling pathways that control bone resorption and formation are RANK / RANKL / OPG; M-CSF – c-FMS; canonical and non-canonical signaling pathways Wnt; Notch; MARK; TGFβ / SMAD; ephrinB1/ephrinB2 – EphB4, TNFα – TNFβ, and Bim – Bax/Bak. Cytokines, growth factors, prostaglandins, parathyroid hormone, vitamin D, calcitonin, and estrogens also act as regulators of bone remodeling. The role of non-encoding microRNAs and long RNAs in the process of bone cell differentiation has been established. MicroRNAs affect many target genes, have both a repressive effect on bone formation and activate osteoblast differentiation in different ways. Excess of glucocorticoids negatively affects all stages of bone remodeling, disrupts molecular signaling, induces apoptosis of osteocytes and osteoblasts in different ways, and increases the life cycle of osteoclasts. Glucocorticoids disrupt the reversal stage, which is critical for the subsequent stages of remodeling. Negative effects of GCs on signaling molecules of the canonical Wingless (WNT)/β-catenin pathway and other signaling pathways impair osteoblastogenesis. Under the influence of excess glucocorticoids biosynthesis of biologically active growth factors is reduced, which leads to a decrease in the expression by osteoblasts of molecules that form the osteoid. Glucocorticoids stimulate the expression of mineralization inhibitor proteins, osteoid mineralization is delayed, which is accompanied by increased local matrix demineralization. Although many signaling pathways involved in bone resorption and formation have been discovered and described, the temporal and spatial mechanisms of their sequential turn-on and turn-off in cell proliferation and differentiation require additional research.
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Park JY, Kwon YW, Kim SA, Park SD, Kim CH, Kim JH, Lee JH. Polyherbal formula SC-E3 inhibits rheumatoid arthritis activity in a mouse model of type-II collagen-induced arthritis. JOURNAL OF INTEGRATIVE MEDICINE-JIM 2020; 19:265-273. [PMID: 33349609 DOI: 10.1016/j.joim.2020.12.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Accepted: 10/30/2020] [Indexed: 12/16/2022]
Abstract
OBJECTIVE SC-E3 is a polyherbal formula that contains five medicinal herbs used frequently in traditional herbal medicine. In our previous study, we demonstrated the antioxidant and anti-inflammatory effects of SC-E3. The present study examined the effects of SC-E3 in a mouse model of type-II collagen-induced arthritis (CIA). METHODS In vivo, male DBA/1J mice were immunized by intradermal injection of bovine type-II collagen and complete or incomplete Freund's adjuvant, to induce arthritis. SC-E3 was orally administered daily for 23 days. In vitro, bone marrow-derived macrophages (BMMs) were treated with macrophage colony-stimulating factor (M-CSF) and receptor activator of nuclear factor-κB ligand (RANKL) in the absence or presence of SC-E3. RESULTS Administrations of SC-E3 were found to have anti-arthritic effects in the joints of CIA mice, as evidenced by reduced paw swelling, bone erosion and deformation, inflammatory cell infiltration, and inflammation in synovial membrane. SC-E3 also reduced serum levels of tumor necrosis factor-α, interleukin-1β, aspartate aminotransferase and alanine aminotransferase. Furthermore, tartrate-resistant acid phosphatase-positive osteoclast numbers in the joints were significantly lower in SC-E3-treated CIA mice than in CIA mice. In addition, the differentiations of BMMs to multinucleated osteoclasts induced by M-CSF and RANKL stimulation were dose-dependently reduced by SC-E3. CONCLUSION These results suggest that SC-E3 possesses substantial anti-arthritic activity because it inhibits pro-inflammatory cytokines and osteoclastogenesis, and that SC-E3 has potential therapeutic use for the treatment of rheumatoid arthritis.
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Affiliation(s)
- Ju-Yeon Park
- College of Korean Medicine, Dongguk University, Goyang 10326, Republic of Korea
| | - Young-Won Kwon
- College of Korean Medicine, Dongguk University, Goyang 10326, Republic of Korea
| | - Sun-Ah Kim
- College of Korean Medicine, Dongguk University, Goyang 10326, Republic of Korea
| | - Sun-Dong Park
- College of Korean Medicine, Dongguk University, Goyang 10326, Republic of Korea
| | - Chang-Hyun Kim
- Department of Medicine, College of Medicine, Dongguk University, Goyang 10326, Republic of Korea
| | - Jin-Hee Kim
- Department of Biomedical Laboratory Science, College of Health Science, Cheongju University, Cheongju 28503, Republic of Korea.
| | - Ju-Hee Lee
- College of Korean Medicine, Dongguk University, Goyang 10326, Republic of Korea.
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KARATAŞ A, ORHAN C, TUZCU M, ŞAHİN N, ÖZERCAN İH, KOCA SS, JUTURU V, ŞAHİN K. Mango ginger (curcuma amada) inhibits collagen-induced arthritis by modulating inflammatory cytokine levels in rats. Turk J Med Sci 2020; 50:2040-2047. [PMID: 32659877 PMCID: PMC7775699 DOI: 10.3906/sag-2004-105] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Accepted: 07/11/2020] [Indexed: 12/28/2022] Open
Abstract
Background/aim Mango ginger (MG: curcuma amada) has antioxidant and antiinflammatory activities. The aim was to evaluate the antiarthritic potential efficacy of MG on collagen-induced arthritis. Materials and methods Twenty-one female Wistar-albino rats were divided into three groups. Arthritis was induced by intradermal injections of type II collagen and Freund’s adjuvant. MG extract was orally administered starting from the first collagen injection. TNF-α, IL-6, IL-17, obestatin, sclerostin, and DKK-1 serum levels were determined, and perisynovial inflammation and cartilage-bone destruction in the paws were histologically evaluated. Moreover, joint tissue TNF-α, IL-17, NF-κB, and COX-2 levels were analyzed. Results TNF-α, IL-17, IL-6, and DKK-1 serum levels were increased, and obestatin and sclerostin serum levels were decreased in the arthritis group compared to the control group. However, MG supplements decreased TNF-α, IL-17, IL-6, and DKK-1 serum levels and increased obestatin and sclerostin serum levels. Similarly, while collagen injection increased tissue TNF-α, IL-17, NF-κB, and COX-2 levels, MG decreased TNF-α, IL-17, and NF-κB levels. Moreover, MG ameliorated perisynovial inflammation and cartilage-bone destruction in the paws. Conclusion MG ameliorates arthritis via actions on inflammatory ways and wingless (Wnt) signaling pathway. These results suggest that MG may have a considerable potential efficacy for the treatment of rheumatoid arthritis.
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Affiliation(s)
- Ahmet KARATAŞ
- Department of Rheumatology, School of Medicine, Fırat University, ElazığTURKEY
| | - Cemal ORHAN
- Department of Rheumatology, School of Medicine, Fırat University, ElazığTURKEY
| | - Mehmet TUZCU
- Department of Biology, Faculty of Science, Fırat University, ElazığTURKEY
| | - Nurhan ŞAHİN
- Department of Animal Nutrition, Faculty of Veterinary Science, Fırat University, ElazığTURKEY
| | | | | | - Vijaya JUTURU
- Research and Development, OmniActive Health Technologies Inc., MorristownUSA
| | - Kazim ŞAHİN
- Department of Animal Nutrition, Faculty of Veterinary Science, Fırat University, ElazığTURKEY
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Silencing of Ac45 Simultaneously Inhibits Osteoclast-Mediated Bone Resorption and Attenuates Dendritic Cell-Mediated Inflammation through Impairing Acidification and Cathepsin K Secretion. Infect Immun 2020; 89:IAI.00436-20. [PMID: 33077625 DOI: 10.1128/iai.00436-20] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2020] [Accepted: 09/29/2020] [Indexed: 02/05/2023] Open
Abstract
Endodontic disease is characterized by inflammation and destruction of periapical tissues, leading to severe bone resorption and tooth loss. ATP6AP1 (Ac45) has been implicated in human immune diseases, yet the mechanism underlying how Ac45 regulates immune response and reaction in inflammatory diseases remains unknown. We generated endodontic disease mice through bacterial infection as an inflammatory disease model and used adeno-associated virus (AAV)-mediated Ac45 RNA interference knockdown to study the function of Ac45 in periapical inflammation and bone resorption. We demonstrated that the AAV small hairpin RNA targeting Ac45 (AAV-sh-Ac45) impaired cellular acidification, extracellular acidification, and bone resorption. Our results showed that local delivery of AAV-sh-Ac45 in periapical tissues in bacterium-induced inflammatory lesions largely reduced bone destruction, inhibited inflammation, and dramatically reduced mononuclear immune cells. T-cell, macrophage, and dendritic cell infiltration in the periapical lesion was dramatically reduced, and the periodontal ligament was protected from inflammation-induced destruction. Furthermore, AAV-sh-Ac45 significantly reduced osteoclast formation and the expression of proinflammatory cytokines, such as tumor necrosis factor alpha, interleukin-10 (IL-10), IL-12, IL-1α, IL-6, and IL-17. Interestingly, AAV-sh-Ac45 impaired mature cathepsin K secretion more significantly than that by AAV-sh-C1 and AAV-sh-CtsK Unbiased genome-wide transcriptome sequencing analysis of Ctsk -/- dendritic cells stimulated with lipopolysaccharide demonstrated that the ablation of Ctsk dramatically reduced dendritic cell-mediated inflammatory signaling. Taken together, our results indicated that AAV-sh-Ac45 simultaneously inhibits osteoclast-mediated bone resorption and attenuates dendritic cell-mediated inflammation through impairing acidification and cathepsin K secretion. Thus, Ac45 may be a novel target for therapeutic approaches to attenuate inflammation and bone erosion in endodontic disease and other inflammation-related osteolytic diseases.
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Culibrk RA, Hahn MS. The Role of Chronic Inflammatory Bone and Joint Disorders in the Pathogenesis and Progression of Alzheimer's Disease. Front Aging Neurosci 2020; 12:583884. [PMID: 33364931 PMCID: PMC7750365 DOI: 10.3389/fnagi.2020.583884] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Accepted: 11/06/2020] [Indexed: 12/12/2022] Open
Abstract
Late-onset Alzheimer's Disease (LOAD) is a devastating neurodegenerative disorder that causes significant cognitive debilitation in tens of millions of patients worldwide. Throughout disease progression, abnormal secretase activity results in the aberrant cleavage and subsequent aggregation of neurotoxic Aβ plaques in the cerebral extracellular space and hyperphosphorylation and destabilization of structural tau proteins surrounding neuronal microtubules. Both pathologies ultimately incite the propagation of a disease-associated subset of microglia-the principle immune cells of the brain-characterized by preferentially pro-inflammatory cytokine secretion and inhibited AD substrate uptake capacity, which further contribute to neuronal degeneration. For decades, chronic neuroinflammation has been identified as one of the cardinal pathophysiological driving features of AD; however, despite a number of works postulating the underlying mechanisms of inflammation-mediated neurodegeneration, its pathogenesis and relation to the inception of cognitive impairment remain obscure. Moreover, the limited clinical success of treatments targeting specific pathological features in the central nervous system (CNS) illustrates the need to investigate alternative, more holistic approaches for ameliorating AD outcomes. Accumulating evidence suggests significant interplay between peripheral immune activity and blood-brain barrier permeability, microglial activation and proliferation, and AD-related cognitive decline. In this work, we review a narrow but significant subset of chronic peripheral inflammatory conditions, describe how these pathologies are associated with the preponderance of neuroinflammation, and posit that we may exploit peripheral immune processes to design interventional, preventative therapies for LOAD. We then provide a comprehensive overview of notable treatment paradigms that have demonstrated considerable merit toward treating these disorders.
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Affiliation(s)
| | - Mariah S. Hahn
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, NY, United States
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Kim SI, Kim YH, Kang BG, Kang MK, Lee EJ, Kim DY, Oh H, Oh SY, Na W, Lim SS, Kang YH. Linarin and its aglycone acacetin abrogate actin ring formation and focal contact to bone matrix of bone-resorbing osteoclasts through inhibition of αvβ3 integrin and core-linked CD44. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2020; 79:153351. [PMID: 32987362 DOI: 10.1016/j.phymed.2020.153351] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Revised: 09/04/2020] [Accepted: 09/18/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND Since enhanced bone resorption due to osteoclast differentiation and activation cause skeletal diseases, there is a growing need in therapeutics for combating bone-resorbing osteoclasts. Botanical antioxidants are being increasingly investigated for their health-promoting effects on bone. Edible Cirsium setidens contains various polyphenols of linarin, pectolinarin, and apigenin with antioxidant and hepatoprotective effects. PURPOSE This study aimed to determine whether linarin present in Cirsium setidens water extracts (CSE) and its aglycone acacetin inhibited osteoclastogenesis of RANKL-exposed RAW 264.7 murine macrophages for 5 days. METHODS This study assessed the osteoprotective effects of CSE, linarin and acacetin on RANKL-induced differentiation and activation of osteoclasts by using MTT assay, TRAP staining, Western blot analysis, bone resorption assay actin ring staining, adhesion assay and immunocytochemical assay. This study explored the underlying mechanisms of their osteoprotection, and identified major components present in CSE by HPLC analysis. RESULTS Linarin and pectolinarin were identified as major components of CSE. Nontoxic linarin and acacetin as well as CSE, but not pectolinarin attenuated the RANKL-induced macrophage differentiation into multinucleated osteoclasts, and curtailed osteoclastic bone resorption through reducing lacunar acidification and bone matrix degradation in the osteoclast-bone interface. Linarin and acacetin in CSE reduced the transmigration and focal contact of osteoclasts to bone matrix-mimicking RGD peptide. Such reduction was accomplished by inhibiting the induction of integrins, integrin-associated proteins of paxillin and gelsolin, cdc42 and CD44 involved in the formation of actin rings. The inhibition of integrin-mediated actin ring formation by linarin and acacetin entailed the disruption of TRAF6-c-Src-PI3K signaling of bone-resorbing osteoclasts. The functional inhibition of c-Src was involved in the loss of F-actin-enriched podosome core protein cortactin-mediated actin assembly due to linarin and acacetin. CONCLUSION These observations demonstrate that CSE, linarin and acacetin were effective in retarding osteoclast function of focal adhesion to bone matrix and active bone resorption via inhibition of diffuse cloud-associated αvβ3 integrin and core-linked CD44.
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Affiliation(s)
- Soo-Il Kim
- Department of Food Science and Nutrition and Korean Institute of Nutrition, Hallym University, Chuncheon, Korea
| | - Yun-Ho Kim
- Department of Food Science and Nutrition and Korean Institute of Nutrition, Hallym University, Chuncheon, Korea
| | - Beom Goo Kang
- Department of Food Science and Nutrition and Korean Institute of Nutrition, Hallym University, Chuncheon, Korea
| | - Min-Kyung Kang
- Department of Food Science and Nutrition and Korean Institute of Nutrition, Hallym University, Chuncheon, Korea
| | - Eun-Jung Lee
- Department of Food Science and Nutrition and Korean Institute of Nutrition, Hallym University, Chuncheon, Korea
| | - Dong Yeon Kim
- Department of Food Science and Nutrition and Korean Institute of Nutrition, Hallym University, Chuncheon, Korea
| | - Hyeongjoo Oh
- Department of Food Science and Nutrition and Korean Institute of Nutrition, Hallym University, Chuncheon, Korea
| | - Su Yeon Oh
- Department of Food Science and Nutrition and Korean Institute of Nutrition, Hallym University, Chuncheon, Korea
| | - Woojin Na
- Department of Food Science and Nutrition and Korean Institute of Nutrition, Hallym University, Chuncheon, Korea
| | - Soon Sung Lim
- Department of Food Science and Nutrition and Korean Institute of Nutrition, Hallym University, Chuncheon, Korea
| | - Young-Hee Kang
- Department of Food Science and Nutrition and Korean Institute of Nutrition, Hallym University, Chuncheon, Korea.
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Influence of the TGF-β Superfamily on Osteoclasts/Osteoblasts Balance in Physiological and Pathological Bone Conditions. Int J Mol Sci 2020; 21:ijms21207597. [PMID: 33066607 PMCID: PMC7589189 DOI: 10.3390/ijms21207597] [Citation(s) in RCA: 52] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Revised: 10/09/2020] [Accepted: 10/10/2020] [Indexed: 12/19/2022] Open
Abstract
The balance between bone forming cells (osteoblasts/osteocytes) and bone resorbing cells (osteoclasts) plays a crucial role in tissue homeostasis and bone repair. Several hormones, cytokines, and growth factors-in particular the members of the TGF-β superfamily such as the bone morphogenetic proteins-not only regulate the proliferation, differentiation, and functioning of these cells, but also coordinate the communication between them to ensure an appropriate response. Therefore, this review focuses on TGF-β superfamily and its influence on bone formation and repair, through the regulation of osteoclastogenesis, osteogenic differentiation of stem cells, and osteoblasts/osteoclasts balance. After introducing the main types of bone cells, their differentiation and cooperation during bone remodeling and fracture healing processes are discussed. Then, the TGF-β superfamily, its signaling via canonical and non-canonical pathways, as well as its regulation by Wnt/Notch or microRNAs are described and discussed. Its important role in bone homeostasis, repair, or disease is also highlighted. Finally, the clinical therapeutic uses of members of the TGF-β superfamily and their associated complications are debated.
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Van Raemdonck K, Umar S, Shahrara S. The pathogenic importance of CCL21 and CCR7 in rheumatoid arthritis. Cytokine Growth Factor Rev 2020; 55:86-93. [PMID: 32499193 PMCID: PMC10018533 DOI: 10.1016/j.cytogfr.2020.05.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2020] [Accepted: 05/12/2020] [Indexed: 02/08/2023]
Abstract
Innate and adaptive immunity regulate the inflammatory and erosive phenotypes observed in rheumatoid arthritis (RA) patients. Hence, identifying novel pathways that participate in different stages of RA pathology will provide valuable insights concerning the mechanistic behavior of different joint leukocytes and the strategy to restrain their activity. Recent findings have revealed that CCL21 poses as a risk factor for RA and expression of its receptor, CCR7, on circulating monocytes is representative of the patient's disease activity score. Expression of CCR7 was found to be the hallmark of RA synovial fluid (SF) M1 macrophages (MФs) and its levels were potentiated in response to M1 mediating factors and curtailed by M2 mediators in naïve MФs. Intriguingly, although both CCR7 ligands, CCL19 and CCL21, are elevated in RA specimens, only CCL21 was predominately responsible for CCR7's pathological manifestation of RA. Unique subset of MФs differentiated in response to CCL21 stimulation, exhibited upregulation in Th17-polarizing monokines. Moreover, CCL21-activated monokines were capable of differentiating naïve T cells into joint Th17 cells, which also partook in RA osteoclastogenesis. Finally, to conserve chronic inflammation, SF CCL21 amplified RA neovascularization directly and indirectly by promoting RA FLS and MΦs to secrete proangiogenic factors, VEGF and IL-17. This review aims to shed light on the broad pathogenic impact of CCL21, linking immunostimulatory MФs with Th17 cells, while concurrently advancing RA bone destruction and neovascularization.
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Affiliation(s)
- Katrien Van Raemdonck
- Jesse Brown VA Medical Center, Chicago, IL 60612, United States; Department of Medicine, Division of Rheumatology, University of Illinois at Chicago, IL 60612, United States
| | - Sadiq Umar
- Jesse Brown VA Medical Center, Chicago, IL 60612, United States; Department of Medicine, Division of Rheumatology, University of Illinois at Chicago, IL 60612, United States
| | - Shiva Shahrara
- Jesse Brown VA Medical Center, Chicago, IL 60612, United States; Department of Medicine, Division of Rheumatology, University of Illinois at Chicago, IL 60612, United States.
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Ailioaie LM, Litscher G. Molecular and Cellular Mechanisms of Arthritis in Children and Adults: New Perspectives on Applied Photobiomodulation. Int J Mol Sci 2020; 21:ijms21186565. [PMID: 32911717 PMCID: PMC7554967 DOI: 10.3390/ijms21186565] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Revised: 08/31/2020] [Accepted: 09/02/2020] [Indexed: 12/13/2022] Open
Abstract
Juvenile idiopathic arthritis and adult rheumatoid arthritis are two major groups with chronic joint pain and inflammation, extra-articular manifestations, and high risk of comorbidities, which can cause physical and ocular disability, as well as create great socio-economic pressure worldwide. The pathogenesis of arthritis manifested in childhood and adulthood is multifactorial, unclear, and overly complex, in which immunity plays an important role. Although there are more and more biological agents with different mechanisms of action for the treatment of arthritis, the results are not as expected, because there are partial responses or non-responsive patients to these compounds, high therapeutic costs, side effects, and so on; therefore, we must turn our attention to other therapeutic modalities. Updating knowledge on molecular and cellular mechanisms in the comparative pathogenesis of chronic arthritis in both children and adults is necessary in the early and correct approach to treatment. Photobiomodulation (PBM) represents a good option, offering cost-effective advantages over drug therapy, with a quicker, more positive response to treatment and no side effects. The successful management of PBM in arthritis is based on the clinician’s ability to evaluate correctly the inflammatory status of the patient, to seek the optimal solution, to choose the best technology with the best physical parameters, and to select the mode of action to target very precisely the immune system and the molecular signaling pathways at the molecular level with the exact amount of quantum light energy in order to obtain the desired immune modulation and the remission of the disease. Light is a very powerful tool in medicine because it can simultaneously target many cascades of immune system activation in comparison with drugs, so PBM can perform very delicate tasks inside our cells to modulate cellular dysfunctions, helping to initiate self-organization phenomena and finally, healing the disease. Interdisciplinary teams should work diligently to meet these needs by also using single-cell imaging devices for multispectral laser photobiomodulation on immune cells.
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Affiliation(s)
- Laura Marinela Ailioaie
- Department of Medical Physics, Alexandru Ioan Cuza University, 11 Carol I Boulevard, 700506 Iaşi, Romania;
- Ultramedical & Laser Clinic, 83 Arcu Street, 700135 Iaşi, Romania
| | - Gerhard Litscher
- Research Unit of Biomedical Engineering in Anesthesia and Intensive Care Medicine, Research Unit for Complementary and Integrative Laser Medicine, and Traditional Chinese Medicine (TCM) Research Center Graz, Medical University of Graz, Auenbruggerplatz 39, 8036 Graz, Austria
- Correspondence: ; Tel.: +43-316-385-83907
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Wielińska J, Kolossa K, Świerkot J, Dratwa M, Iwaszko M, Bugaj B, Wysoczańska B, Chaszczewska-Markowska M, Jeka S, Bogunia-Kubik K. Polymorphisms within the RANK and RANKL Encoding Genes in Patients with Rheumatoid Arthritis: Association with Disease Progression and Effectiveness of the Biological Treatment. Arch Immunol Ther Exp (Warsz) 2020; 68:24. [PMID: 32815001 PMCID: PMC7438366 DOI: 10.1007/s00005-020-00590-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Accepted: 06/17/2020] [Indexed: 12/11/2022]
Abstract
Inconsistency of the results regarding the genetic variability within genes coding for receptor activator of nuclear factor κB (RANK) and its ligand (RANKL) in rheumatoid arthritis (RA) prompted us to study the RANK and RANKL polymorphisms as potential biomarkers associated with disease predisposition and response to anti-TNF treatment in a group of Polish patients with RA. This study enrolled 318 RA patients and 163 controls. RANK (rs8086340, C > G; rs1805034, C > T) and RANKL (rs7325635, G > A; rs7988338 G > A) alleles were determined by real-time PCR with melting curve analysis and related with clinical parameters. In addition, RANKL serum levels were measured by ELISA. The RANK rs8086340-G allele was overrepresented among patients as compared to controls (OD = 1.777, p = 0.038). C-reactive protein (CRP) levels were significantly (p < 0.05) associated with RANK rs8086340 polymorphism and were higher in the CC-homozygotes at the baseline while lower in the GG-carriers at the 12th week of the treatment. At the latter time point RANKL rs7325635-GG-positive patients also showed significantly lower CRP concentrations. Higher alkaline phosphatase levels before induction of anti-TNF therapy were observed in RANK rs8086340 and RANK rs1805034 CC homozygotes (p = 0.057 and p = 0.035, respectively). The GG homozygosity of both RANKL single nucleotide polymorphisms was significantly associated with the number of swollen joints (rs7988338 and rs7325635, before and at the 12th week of therapy, respectively, p < 0.05 in both cases). These results imply that polymorphisms within the RANK and RANKL genes affect RA susceptibility and anti-TNF treatment outcome.
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Affiliation(s)
- Joanna Wielińska
- Laboratory of Clinical Immunogenetics and Pharmacogenetics, Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Wroclaw, Poland
| | - Katarzyna Kolossa
- Department of Rheumatology and Connective Tissue Diseases, Jan Biziel University Hospital No. 2, Bydgoszcz, Poland
| | - Jerzy Świerkot
- Department of Rheumatology and Internal Medicine, Wroclaw Medical University, Wroclaw, Poland
| | - Marta Dratwa
- Laboratory of Clinical Immunogenetics and Pharmacogenetics, Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Wroclaw, Poland
| | - Milena Iwaszko
- Laboratory of Clinical Immunogenetics and Pharmacogenetics, Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Wroclaw, Poland
| | - Bartosz Bugaj
- Department of Rheumatology and Internal Medicine, Wroclaw Medical University, Wroclaw, Poland
| | - Barbara Wysoczańska
- Laboratory of Clinical Immunogenetics and Pharmacogenetics, Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Wroclaw, Poland
| | - Monika Chaszczewska-Markowska
- Laboratory of Clinical Immunogenetics and Pharmacogenetics, Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Wroclaw, Poland
| | - Sławomir Jeka
- Department of Rheumatology and Connective Tissue Diseases, Jan Biziel University Hospital No. 2, Bydgoszcz, Poland
- Ludwik Rydygier Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University, Torun, Poland
| | - Katarzyna Bogunia-Kubik
- Laboratory of Clinical Immunogenetics and Pharmacogenetics, Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Wroclaw, Poland.
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Lee WS, Kato M, Sugawara E, Kono M, Kudo Y, Kono M, Fujieda Y, Bohgaki T, Amengual O, Oku K, Yasuda S, Onodera T, Iwasaki N, Atsumi T. Protective Role of Optineurin Against Joint Destruction in Rheumatoid Arthritis Synovial Fibroblasts. Arthritis Rheumatol 2020; 72:1493-1504. [DOI: 10.1002/art.41290] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Accepted: 04/14/2020] [Indexed: 01/02/2023]
Affiliation(s)
- Wen Shi Lee
- Hokkaido University, Sapporo, Japan, and Tokyo Medical and Dental University Tokyo Japan
| | | | | | | | | | | | | | | | | | | | - Shinsuke Yasuda
- Hokkaido University, Sapporo, Japan, and Tokyo Medical and Dental University Tokyo Japan
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Zhang L, Peng TL, Wang L, Meng XH, Zhu W, Zeng Y, Zhu JQ, Zhou Y, Xiao HM, Deng HW. Network-based Transcriptome-wide Expression Study for Postmenopausal Osteoporosis. J Clin Endocrinol Metab 2020; 105:5850085. [PMID: 32483604 PMCID: PMC7320836 DOI: 10.1210/clinem/dgaa319] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Accepted: 05/27/2020] [Indexed: 01/08/2023]
Abstract
PURPOSE Menopause is a crucial physiological transition during a woman's life, and it occurs with growing risks of health issues like osteoporosis. To identify postmenopausal osteoporosis-related genes, we performed transcriptome-wide expression analyses for human peripheral blood monocytes (PBMs) using Affymetrix 1.0 ST arrays in 40 Caucasian postmenopausal women with discordant bone mineral density (BMD) levels. METHODS We performed multiscale embedded gene coexpression network analysis (MEGENA) to study functionally orchestrating clusters of differentially expressed genes in the form of functional networks. Gene sets net correlations analysis (GSNCA) was applied to assess how the coexpression structure of a predefined gene set differs in high and low BMD groups. Bayesian network (BN) analysis was used to identify important regulation patterns between potential risk genes for osteoporosis. A small interfering ribonucleic acid (siRNA)-based gene silencing in vitro experiment was performed to validate the findings from BN analysis. RESULT MEGENA showed that the "T cell receptor signaling pathway" and the "osteoclast differentiation pathway" were significantly enriched in the identified compact network, which is significantly correlated with BMD variation. GSNCA revealed that the coexpression structure of the "Signaling by TGF-beta receptor complex pathway" is significantly different between the 2 BMD discordant groups; the hub genes in the postmenopausal low and high BMD group are FURIN and SMAD3 respectively. With siRNA in vitro experiments, we confirmed the regulation relationship of TGFBR2-SMAD7 and TGFBR1-SMURF2. MAIN CONCLUSION The present study suggests that biological signals involved in monocyte recruitment, monocyte/macrophage lineage development, osteoclast formation, and osteoclast differentiation might function together in PBMs that contribute to the pathogenesis of postmenopausal osteoporosis.
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Affiliation(s)
- Lan Zhang
- Center for Biomedical informatics and Genomics, Department of Medicine, Tulane University, New Orleans, Louisiana
| | - Tian-Liu Peng
- Institute of Reproduction and Stem Cell Engineering, School of Basic Medical Science, Central South University, Changsha, Hunan, China
| | - Le Wang
- Institute of Reproduction and Stem Cell Engineering, School of Basic Medical Science, Central South University, Changsha, Hunan, China
| | - Xiang-He Meng
- Laboratory of Molecular and Statistical Genetics, College of Life Sciences, Hunan Normal University, Changsha, Hunan, China
| | - Wei Zhu
- Center for Biomedical informatics and Genomics, Department of Medicine, Tulane University, New Orleans, Louisiana
| | - Yong Zeng
- Center for Biomedical informatics and Genomics, Department of Medicine, Tulane University, New Orleans, Louisiana
| | - Jia-Qiang Zhu
- Department of Biostatistics, University of Michigan, Ann Arbor, Michigan
| | - Yu Zhou
- Center for Biomedical informatics and Genomics, Department of Medicine, Tulane University, New Orleans, Louisiana
| | - Hong-Mei Xiao
- Institute of Reproduction and Stem Cell Engineering, School of Basic Medical Science, Central South University, Changsha, Hunan, China
| | - Hong-Wen Deng
- Center for Biomedical informatics and Genomics, Department of Medicine, Tulane University, New Orleans, Louisiana
- Correspondence and Reprint Requests: Hong-Wen Deng, Center for Biomedical Informatics and Genomics, Department of Medicine, School of Medicine, Tulane University, New Orleans, LA 70112, USA. E-mail:
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Kiltz U, Sfikakis PP, Gaffney K, Sator PG, von Kiedrowski R, Bounas A, Gullick N, Conrad C, Rigopoulos D, Lespessailles E, Romanelli M, Ghislain PD, Brandt-Jürgens J, Rashkov R, Aassi M, Orsenigo R, Perella C, Pournara E, Gathmann S, Jagiello P, Veit J, Augustin M. Secukinumab Use in Patients with Moderate to Severe Psoriasis, Psoriatic Arthritis and Ankylosing Spondylitis in Real-World Setting in Europe: Baseline Data from SERENA Study. Adv Ther 2020; 37:2865-2883. [PMID: 32378070 PMCID: PMC7467439 DOI: 10.1007/s12325-020-01352-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Indexed: 12/17/2022]
Abstract
INTRODUCTION Secukinumab, a fully human monoclonal antibody that directly inhibits interleukin-17A, has demonstrated robust efficacy in the treatment of moderate to severe psoriasis (PsO), psoriatic arthritis (PsA) and ankylosing spondylitis (AS), with a rapid onset of action, sustained long-term clinical responses and a consistently favourable safety profile across phase 3 trials. Here, we report the clinical data at enrolment from SERENA, designed to investigate the real-world use of secukinumab across all three indications. METHODS SERENA is an ongoing, longitudinal, observational study conducted at 438 sites across Europe in patients with moderate to severe plaque PsO, active PsA or active AS. Patients should have received at least 16 weeks of secukinumab treatment before enrolment in the study. RESULTS Overall 2800 patients were included in the safety set; patients with PsA (N = 541) were older than patients with PsO (N = 1799) and patients with AS (N = 460); patients with PsO had a higher mean body weight than patients with PsA and patients with AS; and patients with PsO and patients with AS were predominantly male. Time since diagnosis was longer in patients with PsO compared with patients with PsA and patients with AS, and about 40% of patients were either current or former smokers. The proportion of obese patients (body mass index ≥ 30 kg/m2) was similar across indications. Patients were treated with secukinumab for a mean duration of 1 year prior to enrolment (range 0.89-1.04). The percentages of patients with prior biologics exposure were 31.5% PsO, 59.7% PsA and 55% AS. The percentages of patients prescribed secukinumab monotherapy were 75% (n = 1349) in PsO, 48.2% (n = 261) in PsA and 48.9% (n = 225) in AS groups. CONCLUSION Baseline demographics of the study population are consistent with existing literature. This large observational study across all secukinumab indications will provide valuable information on the long-term effectiveness and safety of secukinumab in the real-world setting.
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Affiliation(s)
- Uta Kiltz
- Rheumazentrum Ruhrgebiet, Herne, Germany.
- Ruhr-University Bochum, Bochum, Germany.
| | - Petros P Sfikakis
- Joint Rheumatology Programme, National and Kapodistrian University of Athens Medical School, Athens, Greece
| | - Karl Gaffney
- Norfolk and Norwich University Hospital NHS Foundation Trust, Norfolk, UK
| | | | | | | | - Nicola Gullick
- University Hospitals Coventry & Warwickshire NHS Trust, Coventry, UK
| | - Curdin Conrad
- Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland
| | - Dimitris Rigopoulos
- Dermatology and Venerology, Medical School, National and Kapodistrian University of Athens, Athens, Greece
| | | | - Marco Romanelli
- Dermatology Department, University of Pisa, Lungarno Antonio Pacinotti, 43, 56126, Pisa, PI, Italy
| | | | | | - Rasho Rashkov
- Department of Internal Medicine, Medical University, Sofia, Bulgaria
| | | | | | | | | | | | | | | | - Matthias Augustin
- Institute for Health Services Research in Dermatology and Nursing, University Medical Center Hamburg, Hamburg, Germany
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Lee JK, Lee BG, Jo YH, Hur JM, Kook IC, Hwang KT. Is Femoral Fracture Healing Really Compromised in Patients with Rheumatoid Arthritis? Comparison Study Between Rheumatoid and Non-rheumatoid Arthritis Patients. Indian J Orthop 2020; 54:599-607. [PMID: 32850023 PMCID: PMC7429632 DOI: 10.1007/s43465-020-00117-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/25/2019] [Accepted: 04/10/2020] [Indexed: 02/04/2023]
Abstract
BACKGROUND In patients with rheumatoid arthritis (RA), some problems might occur in fracture healing; however, clinical evidence is limited. Therefore, we compared the time to union and complication rate of femoral fractures between RA and non-RA patients. MATERIALS AND METHODS This study included 42 RA patients who underwent osteosynthesis for femoral trochanter or shaft fracture. For comparison with the RA group, 126 non-RA patients were selected as a control group. The RA group was divided into the trochanteric (RA group I) and shaft fracture group (RA group II) for comparison with each control group (control groups I and II). We analyzed risk factors for nonunion or delayed union and divided patients according to whether atypical or ordinary fracture in shaft fracture. RESULTS Time to union (p = 0.823) and complication rate (p = 0.440) did not differ significantly between RA group I and control group I. A significantly longer time to union (p = 0.001) and higher nonunion rate (p = 0.013) were observed in RA group II compared with control group II. The presence of RA (p = 0.040) and atypical femoral fracture (p = 0.006) were significant risk factors for nonunion or delayed union. CONCLUSIONS The high prevalence of atypical femoral fracture among the femur shaft fractures in the RA patients was considered a significant risk factor for nonunion and delayed union.
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Affiliation(s)
- Jin Kyu Lee
- Department of Orthopaedic Surgery, Hanyang University Hospital, Hanyang University College of Medicine, 222 Wangsimni-ro, Seongdong-gu, Seoul, 04763 Republic of Korea
| | - Bong Gun Lee
- Department of Orthopaedic Surgery, Hanyang University Hospital, Hanyang University College of Medicine, 222 Wangsimni-ro, Seongdong-gu, Seoul, 04763 Republic of Korea
| | - Young Hoon Jo
- Department of Orthopaedic Surgery, Hanyang University Guri Hospital, Guri, Republic of Korea
| | - Jeong Min Hur
- Department of Orthopaedic Surgery, Hanyang University Hospital, Hanyang University College of Medicine, 222 Wangsimni-ro, Seongdong-gu, Seoul, 04763 Republic of Korea
| | - In Cheol Kook
- Department of Orthopaedic Surgery, Hanyang University Hospital, Hanyang University College of Medicine, 222 Wangsimni-ro, Seongdong-gu, Seoul, 04763 Republic of Korea
| | - Kyu Tae Hwang
- Department of Orthopaedic Surgery, Hanyang University Hospital, Hanyang University College of Medicine, 222 Wangsimni-ro, Seongdong-gu, Seoul, 04763 Republic of Korea
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Di Ceglie I, Kruisbergen NNL, van den Bosch MHJ, van Lent PLEM. Fc-gamma receptors and S100A8/A9 cause bone erosion during rheumatoid arthritis. Do they act as partners in crime? Rheumatology (Oxford) 2020; 58:1331-1343. [PMID: 31180451 DOI: 10.1093/rheumatology/kez218] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2018] [Revised: 04/25/2019] [Indexed: 12/19/2022] Open
Abstract
Bone erosion is one of the central hallmarks of RA and is caused by excessive differentiation and activation of osteoclasts. Presence of autoantibodies in seropositive arthritis is associated with radiographic disease progression. ICs, formed by autoantibodies and their antigens, activate Fcγ-receptor signalling in immune cells, and as such stimulate inflammation-mediated bone erosion. Interestingly, ICs can also directly activate osteoclasts by binding to FcγRs on their surface. Next to autoantibodies, high levels of alarmins, among which is S100A8/A9, are typical for RA and they can further activate the immune system but also directly promote osteoclast function. Therefore, IC-activated FcγRs and S100A8/A9 might act as partners in crime to stimulate inflammation and osteoclasts differentiation and function, thereby stimulating bone erosion. This review discusses the separate roles of ICs, FcγRs and alarmins in bone erosion and sheds new light on the possible interplay between them, which could fuel bone erosion.
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Affiliation(s)
- Irene Di Ceglie
- Experimental Rheumatology, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Nik N L Kruisbergen
- Experimental Rheumatology, Radboud University Medical Center, Nijmegen, The Netherlands
| | | | - Peter L E M van Lent
- Experimental Rheumatology, Radboud University Medical Center, Nijmegen, The Netherlands
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Sunzini F, De Stefano S, Chimenti MS, Melino S. Hydrogen Sulfide as Potential Regulatory Gasotransmitter in Arthritic Diseases. Int J Mol Sci 2020; 21:ijms21041180. [PMID: 32053981 PMCID: PMC7072783 DOI: 10.3390/ijms21041180] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Revised: 01/30/2020] [Accepted: 02/09/2020] [Indexed: 01/12/2023] Open
Abstract
The social and economic impact of chronic inflammatory diseases, such as arthritis, explains the growing interest of the research in this field. The antioxidant and anti-inflammatory properties of the endogenous gasotransmitter hydrogen sulfide (H2S) were recently demonstrated in the context of different inflammatory diseases. In particular, H2S is able to suppress the production of pro-inflammatory mediations by lymphocytes and innate immunity cells. Considering these biological effects of H2S, a potential role in the treatment of inflammatory arthritis, such as rheumatoid arthritis (RA), can be postulated. However, despite the growing interest in H2S, more evidence is needed to understand the pathophysiology and the potential of H2S as a therapeutic agent. Within this review, we provide an overview on H2S biological effects, on its role in immune-mediated inflammatory diseases, on H2S releasing drugs, and on systems of tissue repair and regeneration that are currently under investigation for potential therapeutic applications in arthritic diseases.
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Affiliation(s)
- Flavia Sunzini
- Institute of Infection Immunity and Inflammation, University of Glasgow, 120 University, Glasgow G31 8TA, UK;
- Rheumatology, Allergology and clinical immunology, University of Rome Tor Vergata, via Montpelier, 00133 Rome, Italy;
| | - Susanna De Stefano
- Department of Chemical Science and Technologies, University of Rome Tor Vergata, via della Ricerca Scientifica 1, 00133 Rome, Italy;
| | - Maria Sole Chimenti
- Rheumatology, Allergology and clinical immunology, University of Rome Tor Vergata, via Montpelier, 00133 Rome, Italy;
| | - Sonia Melino
- Department of Chemical Science and Technologies, University of Rome Tor Vergata, via della Ricerca Scientifica 1, 00133 Rome, Italy;
- Correspondence: ; Tel.: +39-0672594410
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Lyu Q, Lin A, Cao M, Xu A, Luo P, Zhang J. Alterations in TP53 Are a Potential Biomarker of Bladder Cancer Patients Who Benefit From Immune Checkpoint Inhibition. Cancer Control 2020; 27:1073274820976665. [PMID: 33356494 PMCID: PMC8480364 DOI: 10.1177/1073274820976665] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2020] [Revised: 10/16/2020] [Accepted: 10/30/2020] [Indexed: 12/12/2022] Open
Abstract
In recent years, immune checkpoint inhibitors (ICIs) targeting CTLA-4 or PD1/PDL1 have achieved remarkable success in the treatment of bladder cancer (BLCA), but only a few patients have shown durable clinical benefits. The prognostic role of a mutant form of the tumor suppressor gene TP53 (TP53-MT) in predicting the efficacy of ICIs is highly controversial; therefore, in this study, we obtained data for 210 patients from an immunotherapy cohort, 412 patients from The Cancer Genome Atlas (TCGA)-BLCA cohort and 18 BLCA cell lines from Genomics of Drug Sensitivity in Cancer (GDSC), and we performed integrated bioinformatic analysis to explore the relationships between TP53-MT and clinical benefits derived from ICI treatment and the underlying mechanisms. We conclude that TP53-MT is a potential indicator of a relatively good response to ICIs and associated with prolonged overall survival (OS) (log-rank test, hazard ratio (HR) = 0.65 [95% confidence interval (CI), 0.44-0.99], p = 0.041). Through integrated analysis with several platforms, we found that TP53-MT patients were more likely to benefit from ICIs than wild-type P53 (TP53-WT) patients, which may be the result of 2 major mechanisms. First, the patients with TP53-MT showed stronger tumor antigenicity and tumor antigen presentation, as indicated by a higher tumor mutational load, a higher neoantigen load and increased expression of MHC; second, the antitumor immunity preexisting in tumors was stronger in samples with TP53-MT than in those with TP53-WT, including enrichment of interferon-gamma, positive regulation of TNF secretion pathways and increased expression of some immunostimulatory molecules, such as CXCL9 and CXCL10. This study provided some clues for identifying patients who would potentially benefit from ICIs at the somatic genomic level, developing new indications for targeted second-generation sequencing and promoting the development of precision medicine.
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Affiliation(s)
- Qiong Lyu
- Department of Oncology, Zhujiang Hospital, Southern Medical University, Guang Zhou, China
| | - Anqi Lin
- Department of Oncology, Zhujiang Hospital, Southern Medical University, Guang Zhou, China
| | - Manming Cao
- Department of Oncology, Zhujiang Hospital, Southern Medical University, Guang Zhou, China
| | - Abai Xu
- Department of Urology, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Peng Luo
- Department of Oncology, Zhujiang Hospital, Southern Medical University, Guang Zhou, China
| | - Jian Zhang
- Department of Oncology, Zhujiang Hospital, Southern Medical University, Guang Zhou, China
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Ascone G, Di Ceglie I, Walgreen B, Sloetjes AW, Lindhout E, Bot I, van de Loo FAJ, Koenders MI, van der Kraan PM, Blom AB, van den Bosch MHJ, van Lent PLEM. High LDL levels lessen bone destruction during antigen-induced arthritis by inhibiting osteoclast formation and function. Bone 2020; 130:115140. [PMID: 31712132 DOI: 10.1016/j.bone.2019.115140] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/24/2019] [Revised: 09/27/2019] [Accepted: 11/04/2019] [Indexed: 01/05/2023]
Abstract
Rheumatoid arthritis (RA) is a chronic inflammatory disease, characterized by severe joint inflammation and bone destruction as the result of increased numbers and activity of osteoclasts. RA is often associated with metabolic syndrome, whereby elevated levels of LDL are oxidized into oxLDL, which might affect osteoclastogenesis. In this study, we induced antigen-induced arthritis (AIA) in Apoe-/- mice, which spontaneously develop high LDL levels, to investigate the effects of high LDL/oxLDL levels on osteoclast differentiation and bone destruction. Whereas basal levels of bone resorption were comparable between naive WT and Apoe-/- mice, induction of AIA resulted in a significant reduction of bone destruction in Apoe-/- mice as compared to WT controls. In line with that, the TRAP+ area on the cortical bone was significantly decreased. The absence of Apoe did affect neither the numbers of CD11b+Ly6Chigh and CD11b-/Ly6Chigh osteoclast precursors (OCPs) in the BM of naïve mice nor their in vitro osteoclastogenic potential as indicated by comparable mRNA expression of osteoclast markers. Addition of oxLDL, but not LDL, to pre-osteoclasts from day 3 and mature osteoclasts from day 6 of osteoclastogenesis strongly reduced the number of TRAP+ osteoclasts and their resorptive capacity. This coincided with a decreased expression of various osteoclast markers. Interestingly, oxLDL significantly lowered the expression of osteoclast-associated receptor (Oscar) and the DNAX adaptor protein-12 encoding gene Tyrobp, which regulate the immunoreceptor tyrosine-based activation motif (ITAM) co-stimulation pathway that is strongly involved in osteoclastogenesis. Collectively, our findings suggest that under inflammatory conditions in the joint, high LDL levels lessen bone destruction during AIA, probably by formation of oxLDL that inhibits osteoclast formation and activity through modulation of the ITAM-signaling.
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Affiliation(s)
- G Ascone
- Department of Experimental Rheumatology, Radboud University Medical Center, Radboud Institute of Molecular Life Sciences (RIMLS), Nijmegen, the Netherlands.
| | - I Di Ceglie
- Department of Experimental Rheumatology, Radboud University Medical Center, Radboud Institute of Molecular Life Sciences (RIMLS), Nijmegen, the Netherlands.
| | - B Walgreen
- Department of Experimental Rheumatology, Radboud University Medical Center, Radboud Institute of Molecular Life Sciences (RIMLS), Nijmegen, the Netherlands.
| | - A W Sloetjes
- Department of Experimental Rheumatology, Radboud University Medical Center, Radboud Institute of Molecular Life Sciences (RIMLS), Nijmegen, the Netherlands.
| | - E Lindhout
- Future Diagnostics Solutions (FDx), Wijchen, the Netherlands.
| | - I Bot
- Division of BioTherapeutics, Leiden Academic Centre for Drug Research (LACDR), Leiden, the Netherlands.
| | - F A J van de Loo
- Department of Experimental Rheumatology, Radboud University Medical Center, Radboud Institute of Molecular Life Sciences (RIMLS), Nijmegen, the Netherlands.
| | - M I Koenders
- Department of Experimental Rheumatology, Radboud University Medical Center, Radboud Institute of Molecular Life Sciences (RIMLS), Nijmegen, the Netherlands.
| | - P M van der Kraan
- Department of Experimental Rheumatology, Radboud University Medical Center, Radboud Institute of Molecular Life Sciences (RIMLS), Nijmegen, the Netherlands.
| | - A B Blom
- Department of Experimental Rheumatology, Radboud University Medical Center, Radboud Institute of Molecular Life Sciences (RIMLS), Nijmegen, the Netherlands.
| | - M H J van den Bosch
- Department of Experimental Rheumatology, Radboud University Medical Center, Radboud Institute of Molecular Life Sciences (RIMLS), Nijmegen, the Netherlands.
| | - P L E M van Lent
- Department of Experimental Rheumatology, Radboud University Medical Center, Radboud Institute of Molecular Life Sciences (RIMLS), Nijmegen, the Netherlands.
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Zhang W, Dang K, Huai Y, Qian A. Osteoimmunology: The Regulatory Roles of T Lymphocytes in Osteoporosis. Front Endocrinol (Lausanne) 2020; 11:465. [PMID: 32849268 PMCID: PMC7431602 DOI: 10.3389/fendo.2020.00465] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/31/2019] [Accepted: 06/15/2020] [Indexed: 12/23/2022] Open
Abstract
Immune imbalance caused bone loss. Osteoimmunology is emerging as a new interdisciplinary field to explore the shared molecules and interactions between the skeletal and immune systems. In particular, T lymphocytes (T cells) play pivotal roles in the regulation of bone health. However, the roles and mechanisms of T cells in the treatment of osteoporosis are not fully understood. The present review aims to summarize the essential regulatory roles of T cells in the pathophysiology of various cases of osteoporosis and the development of T cell therapy for osteoporosis from osteoimmunology perspective. As T cell-mediated immunomodulation inhibition reduced bone loss, there is an increasing interest in T cell therapy in an attempt to treat osteoporosis. In summary, the T cell therapy may be further pursued as an immunomodulatory strategy for the treatment of osteoporosis, which can provide a novel perspective for drug development in the future.
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Affiliation(s)
- Wenjuan Zhang
- Lab for Bone Metabolism, Xi'an Key Laboratory of Special Medicine and Health Engineering, Key Lab for Space Biosciences and Biotechnology, Research Center for Special Medicine and Health Systems Engineering, NPU-UAB Joint Laboratory for Bone Metabolism, School of Life Sciences, Northwestern Polytechnical University, Xi'an, China
| | - Kai Dang
- Lab for Bone Metabolism, Xi'an Key Laboratory of Special Medicine and Health Engineering, Key Lab for Space Biosciences and Biotechnology, Research Center for Special Medicine and Health Systems Engineering, NPU-UAB Joint Laboratory for Bone Metabolism, School of Life Sciences, Northwestern Polytechnical University, Xi'an, China
| | - Ying Huai
- Lab for Bone Metabolism, Xi'an Key Laboratory of Special Medicine and Health Engineering, Key Lab for Space Biosciences and Biotechnology, Research Center for Special Medicine and Health Systems Engineering, NPU-UAB Joint Laboratory for Bone Metabolism, School of Life Sciences, Northwestern Polytechnical University, Xi'an, China
| | - Airong Qian
- Lab for Bone Metabolism, Xi'an Key Laboratory of Special Medicine and Health Engineering, Key Lab for Space Biosciences and Biotechnology, Research Center for Special Medicine and Health Systems Engineering, NPU-UAB Joint Laboratory for Bone Metabolism, School of Life Sciences, Northwestern Polytechnical University, Xi'an, China
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46
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Greisen SR, Kragstrup TW, Thomsen JS, Hansen AS, Krishnamurthy A, Hørslev-Petersen K, Hetland ML, Stengaard-Pedersen K, Østergaard M, Ørnbjerg LM, Junker P, Sharpe AH, Freeman GJ, Annamalai L, Hvid M, Moestrup SK, Hauge EM, Catrina AI, Deleuran B. Programmed death ligand 2 - A link between inflammation and bone loss in rheumatoid arthritis. J Transl Autoimmun 2019; 3:100028. [PMID: 32743513 PMCID: PMC7388353 DOI: 10.1016/j.jtauto.2019.100028] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Revised: 12/02/2019] [Accepted: 12/13/2019] [Indexed: 11/17/2022] Open
Abstract
Objective Active rheumatoid arthritis (RA) is accompanied by increased appendicular and axial bone loss, closely associated to the degree of inflammation. The programmed death-1 (PD-1) pathway is important for maintaining peripheral tolerance, and its ligand PD-L2 has recently been associated with bone morphogenetic protein activity. Here, we report that PD-L2 plays a central role in RA osteoimmunology. Methods Femoral bone mineral density (BMD) and trabecular bone microstructure were evaluated by micro-CT in wild type (WT) and PD-L2−/− mice. Osteoclasts were generated from RA synovial fluid mononuclear cells and peripheral blood monocytes. The effects of recombinant PD-L2, was evaluated by tartrate-resistant acid phosphatase (TRAP) activity and the development of bone erosions in the presence of anti-citrullinated protein antibodies (ACPA). Plasma soluble (s)PD-L2 levels were measured in patients with early (e)RA (n = 103) treated with methotrexate alone or in combination with the TNF inhibitor Adalimumab. Results PD-L2−/− mice had a decreased BMD and deteriorated trabecular bone microstructure that was not related to the RANKL/OPG pathway. PD-L2 decreased TRAP activity in osteoclasts and decreased ACPA-induced erosions. In the RA synovial membrane PD-L2 was highly expressed especially in the lining layer and plasma sPD-L2 levels were increased in eRA patients and decreased with treatment. One-year sPD-L2 correlated inversely with erosive progression two years after treatment initiation with methotrexate and placebo. Conclusion PD-L2 regulates bone homeostasis in RA. Our findings provide new insight into the relationship between the immune system and bone homeostasis, and suggest a potential therapeutic target for limiting inflammatory bone loss in RA. PD-L2 is closely related to bone homeostasis in a mouse model. PD-L2 inhibits osteoclastogenesis and osteoclast activation in vitro. PD-L2 is highly expressed by cells in the synovial membrane of rheumatoid arthritis. PD-L2 is associated with less radiographic progression in patients with early rheumatoid arthritis.
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Affiliation(s)
- Stinne R Greisen
- Dept. of Biomedicine, Aarhus University, Denmark.,Dept. of Rheumatology, Aarhus University Hospital, Denmark
| | - Tue W Kragstrup
- Dept. of Biomedicine, Aarhus University, Denmark.,Dept. of Rheumatology, Aarhus University Hospital, Denmark
| | | | | | - Akilan Krishnamurthy
- Rheumatology Division, Department of Medicine, Karolinska University Hospital and Karolinska Institute, Sweden
| | - Kim Hørslev-Petersen
- King Christian 10th Hospital for the Rheumatic Diseases, And University of Southern Denmark, Denmark
| | - Merete Lund Hetland
- Copenhagen Center for Arthritis Research, Center for Rheumatology and Spine Diseases, Rigshospitalet, Glostrup, Denmark.,Dept. of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Denmark
| | | | - Mikkel Østergaard
- Copenhagen Center for Arthritis Research, Center for Rheumatology and Spine Diseases, Rigshospitalet, Glostrup, Denmark.,Dept. of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Denmark
| | - Lykke Midtbøll Ørnbjerg
- Copenhagen Center for Arthritis Research, Center for Rheumatology and Spine Diseases, Rigshospitalet, Glostrup, Denmark.,Dept. of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Denmark
| | - Peter Junker
- Dept. of Rheumatology, Odense University Hospital, Denmark
| | - Arlene H Sharpe
- Dept. of Microbiology and Immunobiology, Dept. of Pathology, Brigham and Women's Hospital, Harvard Medical School, USA
| | - Gordon J Freeman
- Department of Medical Oncology, Dana-Farber Cancer Institute, Harvard Medical School, USA
| | | | - Malene Hvid
- Dept. of Biomedicine, Aarhus University, Denmark.,Dept. of Clinical Medicine, Aarhus University, Denmark
| | | | - Ellen-Margrethe Hauge
- Dept. of Rheumatology, Aarhus University Hospital, Denmark.,Dept. of Clinical Medicine, Aarhus University, Denmark
| | - Anca Irinel Catrina
- Rheumatology Division, Department of Medicine, Karolinska University Hospital and Karolinska Institute, Sweden
| | - Bent Deleuran
- Dept. of Biomedicine, Aarhus University, Denmark.,Dept. of Rheumatology, Aarhus University Hospital, Denmark
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47
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Ramisch A, Heinrich V, Glaser LV, Fuchs A, Yang X, Benner P, Schöpflin R, Li N, Kinkley S, Römer-Hillmann A, Longinotto J, Heyne S, Czepukojc B, Kessler SM, Kiemer AK, Cadenas C, Arrigoni L, Gasparoni N, Manke T, Pap T, Pospisilik JA, Hengstler J, Walter J, Meijsing SH, Chung HR, Vingron M. CRUP: a comprehensive framework to predict condition-specific regulatory units. Genome Biol 2019; 20:227. [PMID: 31699133 PMCID: PMC6839171 DOI: 10.1186/s13059-019-1860-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Accepted: 10/14/2019] [Indexed: 02/06/2023] Open
Abstract
We present the software Condition-specific Regulatory Units Prediction (CRUP) to infer from epigenetic marks a list of regulatory units consisting of dynamically changing enhancers with their target genes. The workflow consists of a novel pre-trained enhancer predictor that can be reliably applied across cell types and species, solely based on histone modification ChIP-seq data. Enhancers are subsequently assigned to different conditions and correlated with gene expression to derive regulatory units. We thoroughly test and then apply CRUP to a rheumatoid arthritis model, identifying enhancer-gene pairs comprising known disease genes as well as new candidate genes.
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Affiliation(s)
- Anna Ramisch
- Department of Computational Molecular Biology, Max Planck Institute for Molecular Genetics, Berlin, 14195, Germany
| | - Verena Heinrich
- Department of Computational Molecular Biology, Max Planck Institute for Molecular Genetics, Berlin, 14195, Germany
| | - Laura V Glaser
- Department of Computational Molecular Biology, Max Planck Institute for Molecular Genetics, Berlin, 14195, Germany
| | - Alisa Fuchs
- Otto-Warburg-Laboratory, Computational Epigenomics, Max Planck Institute for Molecular Genetics, Berlin, 14195, Germany
| | - Xinyi Yang
- Otto-Warburg-Laboratory, Computational Epigenomics, Max Planck Institute for Molecular Genetics, Berlin, 14195, Germany
| | - Philipp Benner
- Department of Computational Molecular Biology, Max Planck Institute for Molecular Genetics, Berlin, 14195, Germany
| | - Robert Schöpflin
- Department of Computational Molecular Biology, Max Planck Institute for Molecular Genetics, Berlin, 14195, Germany
| | - Na Li
- Otto-Warburg-Laboratory, Computational Epigenomics, Max Planck Institute for Molecular Genetics, Berlin, 14195, Germany
| | - Sarah Kinkley
- Otto-Warburg-Laboratory, Computational Epigenomics, Max Planck Institute for Molecular Genetics, Berlin, 14195, Germany
| | - Anja Römer-Hillmann
- Institute of Musculoskeletal Medicine, University Hospital Münster, Münster, 48149, Germany
| | - John Longinotto
- Department of Epigenetics, Max Planck Institute of Immunobiology and Epigenetics, Freiburg, 78108, Germany
| | - Steffen Heyne
- Department of Epigenetics, Max Planck Institute of Immunobiology and Epigenetics, Freiburg, 78108, Germany
| | - Beate Czepukojc
- Department of Pharmacy, Pharmaceutical Biology, University of Saarland, Saarbrücken, 66041, Germany
| | - Sonja M Kessler
- Department of Pharmacy, Pharmaceutical Biology, University of Saarland, Saarbrücken, 66041, Germany
- Department of Pharmacology and Toxicology for Natural Science, Institute of Pharmacy, Martin Luther University Halle-Wittenberg, Halle (Saale), 06120, Germany
| | - Alexandra K Kiemer
- Department of Pharmacy, Pharmaceutical Biology, University of Saarland, Saarbrücken, 66041, Germany
| | - Cristina Cadenas
- Leibniz-Institut für Arbeitsforschung (ifADo), Dortmund, 44139, Germany
| | - Laura Arrigoni
- Department of Epigenetics, Max Planck Institute of Immunobiology and Epigenetics, Freiburg, 78108, Germany
| | - Nina Gasparoni
- Department of Genetics, University of Saarland, Saarbrücken, 66123, Germany
| | - Thomas Manke
- Department of Epigenetics, Max Planck Institute of Immunobiology and Epigenetics, Freiburg, 78108, Germany
| | - Thomas Pap
- Institute of Musculoskeletal Medicine, University Hospital Münster, Münster, 48149, Germany
| | - John A Pospisilik
- Department of Epigenetics, Max Planck Institute of Immunobiology and Epigenetics, Freiburg, 78108, Germany
| | - Jan Hengstler
- Leibniz-Institut für Arbeitsforschung (ifADo), Dortmund, 44139, Germany
| | - Jörn Walter
- Department of Genetics, University of Saarland, Saarbrücken, 66123, Germany
| | - Sebastiaan H Meijsing
- Department of Computational Molecular Biology, Max Planck Institute for Molecular Genetics, Berlin, 14195, Germany
| | - Ho-Ryun Chung
- Otto-Warburg-Laboratory, Computational Epigenomics, Max Planck Institute for Molecular Genetics, Berlin, 14195, Germany
| | - Martin Vingron
- Department of Computational Molecular Biology, Max Planck Institute for Molecular Genetics, Berlin, 14195, Germany.
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Narimiya T, Kanzaki H, Yamaguchi Y, Wada S, Katsumata Y, Tanaka K, Tomonari H. Nrf2 activation in osteoblasts suppresses osteoclastogenesis via inhibiting IL-6 expression. Bone Rep 2019; 11:100228. [PMID: 31763378 PMCID: PMC6861591 DOI: 10.1016/j.bonr.2019.100228] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/06/2019] [Revised: 10/03/2019] [Accepted: 10/18/2019] [Indexed: 12/18/2022] Open
Abstract
ALA/SFC induced the activation of Nrf2 in osteoblasts. IL-6 and RANKL expression in osteoblasts was increased by LPS, but decreased by Nrf2 activation. LPS-mediated RANKL augmentation was dependent on IL-6 induction. Nrf2 activation in osteoblasts suppresses indirectly osteoclastogenesis via inhibiting the expression of IL-6.
Bone destructive diseases such as periodontitis and rheumatoid arthritis are caused by excessive activation of osteoclasts. Osteoclastogenesis is regulated by Receptor activator of nuclear factor kappa-β ligand (RANKL) produced by osteoclastogenesis supporting cells such as osteoblast and osteocyte. Previously, we reported that NF-E2-related factor-2 (Nrf2) activation in osteoclast precursors inhibited osteoclastogenesis and bone destruction via induction of anti-oxidation and thereby attenuated intracellular ROS signaling. However, it still remains unknown whether Nrf2 activation in cells other than osteoclasts give any negative influence on supporting property for osteoclastogenesis. Here we discovered that Nrf2 activation in osteoblasts suppresses indirectly osteoclastogenesis via inhibiting the expression of interleukin-6 (IL-6) which promotes osteoclastogenesis. In this study, 5-aminolevulinic acid hydrochloride (ALA) and sodium ferrous citrate (SFC) was used as the Nrf2 activator. in vitro experiments, using osteoblast cell line, MC3T3-E1, revealed that the expression of IL-6 was increased by LPS stimulation, but decreased after ALA/SFC treatment in mRNA and protein levels. Furthermore, RANKL expression was augmented by LPS, which was blocked by ALA/SFC treatment. Neutralizing antibody against IL-6 confirmed that LPS-mediated RANKL augmentation was dependent on IL-6 induction. in vivo experiments with LPS-mediated bone destruction in mice, confirmed that augmented IL-6 expression in osteoblasts by immunochemical analysis. ALA/SFC treatment attenuated LPS-mediated IL-6 upregulation. These results suggest that Nrf2 activation in osteoblasts suppress IL-6 and inflammatory bone destruction. The Nrf2 activator acts not only on osteoclasts but also on osteoblasts, in other word, Nrf2 activation indirectly suppresses osteoclastogenesis. In conclusion, the Nrf2 activator exhibits dual inhibitory effects via direct action on osteoclast and indirect action on osteoclast supporting cells.
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Affiliation(s)
- Tsuyoshi Narimiya
- Department of Orthodontics, School of Dental Medicine, Tsurumi University, 2-1-3 Tsurumi, Tsurumi-ku, Yokohama, Kanagawa pref., 230-8501, Japan
| | - Hiroyuki Kanzaki
- Department of Orthodontics, School of Dental Medicine, Tsurumi University, 2-1-3 Tsurumi, Tsurumi-ku, Yokohama, Kanagawa pref., 230-8501, Japan
| | - Yuki Yamaguchi
- Department of Orthodontics, School of Dental Medicine, Tsurumi University, 2-1-3 Tsurumi, Tsurumi-ku, Yokohama, Kanagawa pref., 230-8501, Japan
| | - Satoshi Wada
- Department of Orthodontics, School of Dental Medicine, Tsurumi University, 2-1-3 Tsurumi, Tsurumi-ku, Yokohama, Kanagawa pref., 230-8501, Japan
| | - Yuta Katsumata
- Department of Orthodontics, School of Dental Medicine, Tsurumi University, 2-1-3 Tsurumi, Tsurumi-ku, Yokohama, Kanagawa pref., 230-8501, Japan
| | - Ken Tanaka
- Department of Orthodontics, School of Dental Medicine, Tsurumi University, 2-1-3 Tsurumi, Tsurumi-ku, Yokohama, Kanagawa pref., 230-8501, Japan
| | - Hiroshi Tomonari
- Department of Orthodontics, School of Dental Medicine, Tsurumi University, 2-1-3 Tsurumi, Tsurumi-ku, Yokohama, Kanagawa pref., 230-8501, Japan
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49
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Proinflammatory Effects of IL-1β Combined with IL-17A Promoted Cartilage Degradation and Suppressed Genes Associated with Cartilage Matrix Synthesis In Vitro. Molecules 2019; 24:molecules24203682. [PMID: 31614911 PMCID: PMC6833041 DOI: 10.3390/molecules24203682] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Revised: 09/28/2019] [Accepted: 10/10/2019] [Indexed: 12/28/2022] Open
Abstract
Combinations of IL-1β and other proinflammatory cytokines reportedly promote the severity of arthritis. We aimed to investigate the effects of IL-1β combined with IL-17A on cartilage degradation and synthesis in in vitro models. Cartilage explant degradation was determined using sulfated glycosaminoglycans (S-GAGs) levels, matrix metalloproteinase (MMP13) gene expression, uronic acid, and collagen contents. Cell morphology and accumulation of proteoglycans were evaluated using hematoxylin-eosin and safranin O staining, respectively. In the pellet culture model, expressions of cartilage-specific anabolic and catabolic genes were evaluated using real-time qRT-PCR. Early induction of MMP13 gene expression was found concomitantly with significant S-GAGs release. During the prolonged period, S-GAGs release was significantly elevated, while MMP-13 enzyme levels were persistently increased together with the reduction of the cartilaginous matrix molecules. The pellet culture showed anabolic gene downregulation, while expression of the proinflammatory cytokines, mediators, and MMP13 genes were elevated. After cytokine removal, these effects were restored to nearly basal levels. This study provides evidence that IL-1β combined with IL-17A promoted chronic inflammatory arthritis by activating the catabolic processes accompanied with the suppression of cartilage anabolism. These suggest that further applications, which suppress inflammatory enhancers, especially IL-17A, should be considered as a target for arthritis research and therapy.
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50
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Kim KW, Kim BM, Won JY, Lee KA, Kim HR, Lee SH. Toll-like receptor 7 regulates osteoclastogenesis in rheumatoid arthritis. J Biochem 2019; 166:259-270. [PMID: 31086948 DOI: 10.1093/jb/mvz033] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Accepted: 05/07/2019] [Indexed: 12/21/2022] Open
Abstract
This study aimed to determine the regulatory role of toll-like receptor 7 (TLR7) in receptor activator of nuclear factor kappa-B ligand (RANKL) production and osteoclast differentiation in rheumatoid arthritis (RA). In confocal microscopy, the co-expression of TLR7, CD55 and RANKL was determined in RA synovial fibroblasts. After RA synovial fibroblasts were treated with imiquimod, the RANKL gene expression and protein production were determined by real-time polymerase chain reaction (PCR) and enzyme-linked immunosorbent assay (ELISA). Osteoclastogenesis from peripheral blood CD14+ monocytes which were cultured with imiquimod was assessed by determining the numbers of tartrate-resistant acid phosphatase (TRAP)-positive multinucleated cells. The signal pathways mediating the TLR7-induced RANKL expression and osteoclastogenesis were analysed after inhibition of intracellular signal molecules and their phosphorylation. Imiquimod stimulated the expression of TLR7 and RANKL and production of RANKL in RA synovial fibroblasts, increasing the phosphorylation of TRAF6, IRF7, mitogen-activated protein kinases (MAPK), c-Jun and NFATc1. When CD14+ monocytes were cultured with imiquimod or co-cultured with imiquimod-pre-treated RA synovial fibroblasts, they were differentiated into TRAP+ multinucleated osteoclasts in the absence of RANKL. TLR7 activation-induced osteoclastogenesis in RA through direct induction of osteoclast differentiation from its precursors and up-regulation of RANKL production in RA synovial fibroblasts. Thus, the blockage of TLR7 pathway could be a promising therapeutic strategy for preventing bone destruction in RA.
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Affiliation(s)
- Kyoung-Woon Kim
- Convergent Research Consortium in Immunologic Disease, Seoul St. Mary's Hospital College of Medicine, The Catholic University, 222 Banpo-daero, Seocho-gu, Seoul, Korea
| | - Bo-Mi Kim
- Convergent Research Consortium in Immunologic Disease, Seoul St. Mary's Hospital College of Medicine, The Catholic University, 222 Banpo-daero, Seocho-gu, Seoul, Korea
| | - Ji-Yeon Won
- Department of Rheumatology, Research Institute of Medical Science, Konkuk University School of Medicine, 120-1 Neungdong-ro (Hwayang-dong), Gwangjin-gu, Seoul, Korea
| | - Kyung-Ann Lee
- Department of Rheumatology, Research Institute of Medical Science, Konkuk University School of Medicine, 120-1 Neungdong-ro (Hwayang-dong), Gwangjin-gu, Seoul, Korea
| | - Hae-Rim Kim
- Department of Rheumatology, Research Institute of Medical Science, Konkuk University School of Medicine, 120-1 Neungdong-ro (Hwayang-dong), Gwangjin-gu, Seoul, Korea
| | - Sang-Heon Lee
- Department of Rheumatology, Research Institute of Medical Science, Konkuk University School of Medicine, 120-1 Neungdong-ro (Hwayang-dong), Gwangjin-gu, Seoul, Korea
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