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Zhao D, Wu L, Hong M, Zheng S, Wu X, Ye H, Chen F, Zhang D, Liu X, Meng X, Chen X, Chen S, Zhu J, Li J. DKK-1 and Its Influences on Bone Destruction: A Comparative Study in Collagen-Induced Arthritis Mice and Rheumatoid Arthritis Patients. Inflammation 2024; 47:129-144. [PMID: 37688661 DOI: 10.1007/s10753-023-01898-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Revised: 08/07/2023] [Accepted: 08/26/2023] [Indexed: 09/11/2023]
Abstract
Dickkopf-1 (DKK-1) has been considered a master regulator of bone remodeling. As precursors of osteoclasts (OCs), myeloid-derived suppressor cells (MDSCs) were previously shown to participate in the process of bone destruction in rheumatoid arthritis (RA). However, the role of DKK-1 and MDSCs in RA is not yet fully understood. We investigated the relevance between the level of DKK-1 and the expression of MDSCs in different tissues and joint destruction in RA patients and collagen-induced arthritis (CIA) mouse models. Furthermore, the CIA mice were administered recombinant DKK-1 protein. The arthritis scores, bone destruction, and the percentage of MDSCs in the peripheral blood and spleen were monitored. In vitro, the differentiation of MDSCs into OCs was intervened with recombinant protein and inhibitor of DKK-1. The number of OCs differentiated and the protein expression of the Wnt/β-catenin signaling pathway were explored. The level of DKK-1 positively correlates with the frequency of MDSCs and bone erosion in RA patients and CIA mice. Strikingly, recombinant DKK-1 intervention significantly exacerbated arthritis scores and bone destruction, increasing the percentage of MDSCs in the peripheral blood and spleen in CIA mice. In vitro experiments showed that recombinant DKK-1 promoted the differentiation of MDSCs into OCs, reducing the expression of β-catenin and TCF4 and increasing the expression of CyclinD1. In contrast, the DKK-1 inhibitor had the opposite effect. Our findings highlight that DKK-1 promoted MDSCs expansion in RA and enhanced the differentiation of MDSCs into OCs via targeting the Wnt/β-catenin pathway, aggravating the bone destruction in RA.
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Affiliation(s)
- Di Zhao
- Department of Rheumatic & TCM Medical Center, Nanfang Hospital, Southern Medical University, Guangzhou, China
- Department of Traditional Chinese Internal Medicine, School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China
| | - Lisheng Wu
- Department of Rheumatic & TCM Medical Center, Nanfang Hospital, Southern Medical University, Guangzhou, China
- Department of Traditional Chinese Internal Medicine, School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China
| | - Mukeng Hong
- Department of Rheumatic & TCM Medical Center, Nanfang Hospital, Southern Medical University, Guangzhou, China
- Department of Traditional Chinese Internal Medicine, School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China
| | - Songyuan Zheng
- Department of Rheumatic & TCM Medical Center, Nanfang Hospital, Southern Medical University, Guangzhou, China
- Department of Traditional Chinese Internal Medicine, School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China
| | - Xianghui Wu
- Laboratory Animal Research Center, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Haixin Ye
- Department of Rheumatic & TCM Medical Center, Nanfang Hospital, Southern Medical University, Guangzhou, China
- Department of Traditional Chinese Internal Medicine, School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China
| | - Feilong Chen
- Department of Rheumatic & TCM Medical Center, Nanfang Hospital, Southern Medical University, Guangzhou, China
- Department of Traditional Chinese Internal Medicine, School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China
| | - Dingding Zhang
- Department of Rheumatic & TCM Medical Center, Nanfang Hospital, Southern Medical University, Guangzhou, China
- Department of Traditional Chinese Internal Medicine, School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China
| | - Xinhang Liu
- Department of Rheumatic & TCM Medical Center, Nanfang Hospital, Southern Medical University, Guangzhou, China
- Department of Traditional Chinese Internal Medicine, School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China
| | - Xiangyun Meng
- Department of Rheumatic & TCM Medical Center, Nanfang Hospital, Southern Medical University, Guangzhou, China
- Department of Traditional Chinese Internal Medicine, School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China
| | - Xiaoyun Chen
- Department of Rheumatic & TCM Medical Center, Nanfang Hospital, Southern Medical University, Guangzhou, China
- Department of Traditional Chinese Internal Medicine, School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China
| | - Shixian Chen
- Department of Rheumatic & TCM Medical Center, Nanfang Hospital, Southern Medical University, Guangzhou, China
- Department of Traditional Chinese Internal Medicine, School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China
| | - Junqing Zhu
- Department of Rheumatic & TCM Medical Center, Nanfang Hospital, Southern Medical University, Guangzhou, China
- Department of Traditional Chinese Internal Medicine, School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China
| | - Juan Li
- Department of Rheumatic & TCM Medical Center, Nanfang Hospital, Southern Medical University, Guangzhou, China.
- Department of Traditional Chinese Internal Medicine, School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China.
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Omran A, Atanasova D, Landgren F, Magnusson P. Sclerostin: From Molecule to Clinical Biomarker. Int J Mol Sci 2022; 23:4751. [PMID: 35563144 DOI: 10.3390/ijms23094751] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Revised: 04/12/2022] [Accepted: 04/22/2022] [Indexed: 12/23/2022] Open
Abstract
Sclerostin, a glycoprotein encoded by the SOST gene, is mainly produced by mature osteocytes and is a critical regulator of bone formation through its inhibitory effect on Wnt signaling. Osteocytes are differentiated osteoblasts that form a vast and highly complex communication network and orchestrate osteogenesis in response to both mechanical and hormonal cues. The three most commonly described pathways of SOST gene regulation are mechanotransduction, Wnt/β-catenin, and steroid signaling. Downregulation of SOST and thereby upregulation of local Wnt signaling is required for the osteogenic response to mechanical loading. This review covers recent findings concerning the identification of SOST, in vitro regulation of SOST gene expression, structural and functional properties of sclerostin, pathophysiology, biological variability, and recent assay developments for measuring circulating sclerostin. The three-dimensional structure of human sclerostin was generated with the AlphaFold Protein Structure Database applying a novel deep learning algorithm based on the amino acid sequence. The functional properties of the 3-loop conformation within the tertiary structure of sclerostin and molecular interaction with low-density lipoprotein receptor-related protein 6 (LRP6) are also reviewed. Second-generation immunoassays for intact/biointact sclerostin have recently been developed, which might overcome some of the reported methodological obstacles. Sclerostin assay standardization would be a long-term objective to overcome some of the problems with assay discrepancies. Besides the use of age- and sex-specific reference intervals for sclerostin, it is also pivotal to use assay-specific reference intervals since available immunoassays vary widely in their methodological characteristics.
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Kassab A, Rizk N, Prakash S. The Role of Systemic Filtrating Organs in Aging and Their Potential in Rejuvenation Strategies. Int J Mol Sci 2022; 23:ijms23084338. [PMID: 35457154 PMCID: PMC9025381 DOI: 10.3390/ijms23084338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Revised: 04/05/2022] [Accepted: 04/08/2022] [Indexed: 11/26/2022] Open
Abstract
Advances in aging studies brought about by heterochronic parabiosis suggest that aging might be a reversable process that is affected by changes in the systemic milieu of organs and cells. Given the broadness of such a systemic approach, research to date has mainly questioned the involvement of “shared organs” versus “circulating factors”. However, in the absence of a clear understanding of the chronological development of aging and a unified platform to evaluate the successes claimed by specific rejuvenation methods, current literature on this topic remains scattered. Herein, aging is assessed from an engineering standpoint to isolate possible aging potentiators via a juxtaposition between biological and mechanical systems. Such a simplification provides a general framework for future research in the field and examines the involvement of various factors in aging. Based on this simplified overview, the kidney as a filtration organ is clearly implicated, for the first time, with the aging phenomenon, necessitating a re-evaluation of current rejuvenation studies to untangle the extent of its involvement and its possible role as a potentiator in aging. Based on these findings, the review concludes with potential translatable and long-term therapeutics for aging while offering a critical view of rejuvenation methods proposed to date.
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Affiliation(s)
- Amal Kassab
- Biomedical Technology and Cell Therapy Research Laboratory, Department of Biomedical Engineering, Faculty of Medicine, McGill University, 3775 University Street, Montreal, QC H3A 2BA, Canada
| | - Nasser Rizk
- Department of Biomedical Sciences, College of Health Sciences-QU-Health, Qatar University, Doha 2713, Qatar
| | - Satya Prakash
- Biomedical Technology and Cell Therapy Research Laboratory, Department of Biomedical Engineering, Faculty of Medicine, McGill University, 3775 University Street, Montreal, QC H3A 2BA, Canada
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Tozzi R, Masi D, Cipriani F, Contini S, Gangitano E, Spoltore ME, Barchetta I, Basciani S, Watanabe M, Baldini E, Ulisse S, Lubrano C, Gnessi L, Mariani S. Circulating SIRT1 and Sclerostin Correlates with Bone Status in Young Women with Different Degrees of Adiposity. Nutrients 2022; 14:nu14050983. [PMID: 35267956 PMCID: PMC8912833 DOI: 10.3390/nu14050983] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2022] [Revised: 02/22/2022] [Accepted: 02/23/2022] [Indexed: 11/28/2022] Open
Abstract
Sirtuin1 (SIRT1) and sclerostin play important roles in adipose tissue and bone metabolism. We evaluated the circulating SIRT1 and sclerostin relationship with mass and quality of bone while considering the degree of adiposity. Sixty-six premenopausal women (16 underweight, 25 normal weight and 25 with obesity), aged <50 years, were enrolled. Plasma SIRT1, sclerostin and DXA body composition (total fat mass (FM), abdominal visceral adipose tissue, lean mass, trabecular bone score (TBS) and lumbar spine and femoral neck (FN) bone mineral density (BMD)) were assessed. The patients with obesity showed the lowest SIRT1 and TBS values and the highest sclerostin concentrations; BMD increased with FM and BMI and had an inverse association with SIRT1. Sclerostin was negatively correlated with SIRT1 (ρ = −0.37, p = 0.002). When spine BMD, FN BMD and TBS were standardized for BMI, a positive correlation with SIRT1 and a negative correlation with sclerostin were seen (p < 0.005). In the regression analysis, sclerostin was the best independent, negative predictor for BMD and TBS, while SIRT1 directly predicted TBS (p < 0.05). In conclusion, blood measurement of SIRT1 and sclerostin could represent a snapshot of the bone status that, taking into account the degree of adiposity, may reduce the interference of confounding factors in the interpretation of bone health parameters.
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Affiliation(s)
- Rossella Tozzi
- Department of Molecular Medicine, “Sapienza” University of Rome, 00161 Rome, Italy;
| | - Davide Masi
- Department of Experimental Medicine, Section of Medical Physiopathology, Food Science and Endocrinology, “Sapienza” University of Rome, 00161 Rome, Italy; (D.M.); (F.C.); (S.C.); (E.G.); (M.E.S.); (I.B.); (S.B.); (M.W.); (C.L.); (L.G.)
| | - Fiammetta Cipriani
- Department of Experimental Medicine, Section of Medical Physiopathology, Food Science and Endocrinology, “Sapienza” University of Rome, 00161 Rome, Italy; (D.M.); (F.C.); (S.C.); (E.G.); (M.E.S.); (I.B.); (S.B.); (M.W.); (C.L.); (L.G.)
| | - Savina Contini
- Department of Experimental Medicine, Section of Medical Physiopathology, Food Science and Endocrinology, “Sapienza” University of Rome, 00161 Rome, Italy; (D.M.); (F.C.); (S.C.); (E.G.); (M.E.S.); (I.B.); (S.B.); (M.W.); (C.L.); (L.G.)
| | - Elena Gangitano
- Department of Experimental Medicine, Section of Medical Physiopathology, Food Science and Endocrinology, “Sapienza” University of Rome, 00161 Rome, Italy; (D.M.); (F.C.); (S.C.); (E.G.); (M.E.S.); (I.B.); (S.B.); (M.W.); (C.L.); (L.G.)
| | - Maria Elena Spoltore
- Department of Experimental Medicine, Section of Medical Physiopathology, Food Science and Endocrinology, “Sapienza” University of Rome, 00161 Rome, Italy; (D.M.); (F.C.); (S.C.); (E.G.); (M.E.S.); (I.B.); (S.B.); (M.W.); (C.L.); (L.G.)
| | - Ilaria Barchetta
- Department of Experimental Medicine, Section of Medical Physiopathology, Food Science and Endocrinology, “Sapienza” University of Rome, 00161 Rome, Italy; (D.M.); (F.C.); (S.C.); (E.G.); (M.E.S.); (I.B.); (S.B.); (M.W.); (C.L.); (L.G.)
| | - Sabrina Basciani
- Department of Experimental Medicine, Section of Medical Physiopathology, Food Science and Endocrinology, “Sapienza” University of Rome, 00161 Rome, Italy; (D.M.); (F.C.); (S.C.); (E.G.); (M.E.S.); (I.B.); (S.B.); (M.W.); (C.L.); (L.G.)
| | - Mikiko Watanabe
- Department of Experimental Medicine, Section of Medical Physiopathology, Food Science and Endocrinology, “Sapienza” University of Rome, 00161 Rome, Italy; (D.M.); (F.C.); (S.C.); (E.G.); (M.E.S.); (I.B.); (S.B.); (M.W.); (C.L.); (L.G.)
| | - Enke Baldini
- Department of Surgical Sciences, “Sapienza” University of Rome, 00161 Rome, Italy; (E.B.); (S.U.)
| | - Salvatore Ulisse
- Department of Surgical Sciences, “Sapienza” University of Rome, 00161 Rome, Italy; (E.B.); (S.U.)
| | - Carla Lubrano
- Department of Experimental Medicine, Section of Medical Physiopathology, Food Science and Endocrinology, “Sapienza” University of Rome, 00161 Rome, Italy; (D.M.); (F.C.); (S.C.); (E.G.); (M.E.S.); (I.B.); (S.B.); (M.W.); (C.L.); (L.G.)
| | - Lucio Gnessi
- Department of Experimental Medicine, Section of Medical Physiopathology, Food Science and Endocrinology, “Sapienza” University of Rome, 00161 Rome, Italy; (D.M.); (F.C.); (S.C.); (E.G.); (M.E.S.); (I.B.); (S.B.); (M.W.); (C.L.); (L.G.)
| | - Stefania Mariani
- Department of Experimental Medicine, Section of Medical Physiopathology, Food Science and Endocrinology, “Sapienza” University of Rome, 00161 Rome, Italy; (D.M.); (F.C.); (S.C.); (E.G.); (M.E.S.); (I.B.); (S.B.); (M.W.); (C.L.); (L.G.)
- Correspondence: ; Tel.: +39-06499-70721; Fax: +39-06446-1450
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Li J, Ren Y, Li S, Li J. Relationship Between Sclerostin (SOST) Expression and Genetic Loci rs851056, rs1230399 Polymorphisms and Bone Mineral Density in Postmenopausal Women with Type 2 Diabetes in Xinjiang. Diabetes Metab Syndr Obes 2021; 14:4443-4450. [PMID: 34764662 PMCID: PMC8575445 DOI: 10.2147/dmso.s305831] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Accepted: 10/01/2021] [Indexed: 11/23/2022] Open
Abstract
BACKGROUND The Wnt signaling pathway plays a valuable role in bone metabolism. SOST is a major inhibitor of the Wnt signaling pathway. The expression of SOST and genetic polymorphism might be associated with bone mineral density in postmenopausal women with type 2 diabetes mellitus (T2DM). OBJECTIVE This study aims to explore whether SOST protein expression and genetic locus rs851056, rs1230399 polymorphism is associated with bone mineral density in postmenopausal women with T2DM in Xinjiang. METHODS A total of 136 Xinjiang postmenopausal women were divided into four groups: A (-/-), B (±), C (-/+), and D (+/+) by assessing their OGTT and bone mass. Genetic polymorphisms were determined using the mass ARRAY mass spectrometer. RESULTS 1) Genotypes and allele frequencies at rs851056 were statistically significant differences in groups B and D patients compared to group A, respectively. 2) Individuals carrying the GG genotype had lower HDL, Ca, and ALP as compared to those carrying the GC/CC genotypes in group C. In contrast, individuals carrying the GG genotype had higher BMD (L1-4) as compared to those carrying the GC/CC genotypes in group D. 3) SOST protein expression levels were higher in groups C and D than in group A. 4). BMD (L1-4) was negatively correlated with SOST protein. 5) Multiple linear regression analysis for BMD-dependent variables showed that the decrease of BMI and TG were risk factors for BMD (L1-4), besides, the decrease of BMI, ALP, and extended years of menopause were all risk factors for BMD (femoral neck). CONCLUSION SOST protein expression and genetic locus rs851056, rs1230399 polymorphism are associated with bone mineral density in postmenopausal women with type 2 diabetes mellitus in Xinjiang.
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Affiliation(s)
- Jun Li
- Endocrinology and Metabolism Department, First Affiliated Hosptital, School of Medicine, Shihezi University, Shihezi, Xinjiang Uygur Autonomous Region, People’s Republic of China
- Correspondence: Jun Li Email
| | - YanXia Ren
- Endocrinology and Metabolism Department, First Affiliated Hosptital, School of Medicine, Shihezi University, Shihezi, Xinjiang Uygur Autonomous Region, People’s Republic of China
| | - SiYuan Li
- Shihezi University School of Medicine, Shihezi, Xinjiang Uygur Autonomous Region, People’s Republic of China
| | - JiaJia Li
- Endocrinology and Metabolism Department, Second People’s Hospital of Nanyang, Nanyang, Henan Province, People’s Republic of China
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Abstract
Abstract
Background
Rheumatoid arthritis (RA) is characterized by presence of localized and generalized osteoporosis. The mechanism of decreased bone mass is complex and multifactorial, a possible mechanism behind increased bone loss in RA is upregulation of sclerostin. The aim of this work was to evaluate serum sclerostin level in RA patients and its relation with bone mineral density (BMD) and disease activity.
Results
Serum sclerostin level in RA patients was significantly higher than the controls (p < 0.001). Osteopenia and osteoporosis were more prevalent in RA patients (22.5% and 7.5% respectively) compared to controls (15% and 2.5% respectively) (p = 0.006). Serum sclerostin level was significantly correlated with tender joint count (p = 0.014), swollen joint count (p = 0.036), erythrocytes sedimentation rate (p = 0.010), C reactive protein serum level (p = 0.025), disease activity score (DAS) 28-ESR (p = 0.018), DAS28-CRP (p = 0.005), and radiological modified Sharp erosion score (p = 0.049). The correlation of serum sclerostin level in RA patients with BMD and with T-score in all sites revealed an inverse relationship with p values insignificant.
Conclusion
Serum sclerostin is a major player in bone metabolism as a negative regulator of bone growth through inhibition of Wnt signaling that is largely influenced by the disease activity. Controlling the disease activity is a major factor for prevention of local as well as generalized osteoporosis and is essential for the reparative local and systemic bone health.
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Yang J, Xu S, Chen M, Yuan Y, Zhang X, Ma Y, Wu M, Han R, Hu X, Liu R, Deng J, Guan S, Gao X, Pan M, Xu S, Shuai Z, Jiang S, Guan S, Chen L, Pan F. Serum Sclerostin and Bone Morphogenetic Protein-2 Levels in Patients with Ankylosing Spondylitis: A Meta-Analysis. Calcif Tissue Int 2019; 105:37-50. [PMID: 30911810 DOI: 10.1007/s00223-019-00542-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Accepted: 03/16/2019] [Indexed: 12/17/2022]
Abstract
Various studies have investigated the serum sclerostin and bone morphogenetic protein-2 (BMP-2) levels in patients with ankylosing spondylitis (AS), but the results were inconsistent. The aim of this meta-analysis was to synthetically assess the associations of serum levels of sclerostin and BMP-2 with AS. Multiple electronic databases were searched to locate relevant articles published before November 2018. Pooled standard mean difference (SMD) with 95% confidence interval (CI) was calculated by the random-effect model. Totally, 21 studies were included. Meta-analysis results showed no significant difference between AS group and control group in serum sclerostin levels (SMD = 0.098, 95% CI - 0.395 to 0.591, p = 0.697). Nevertheless, serum BMP-2 levels in AS patients were higher than that in controls (SMD = 1.184, 95% CI 0.209 to 2.159, p = 0.017). Subgroup analysis demonstrated that European and South American AS patients had lower serum levels of sclerostin than controls. AS patients with age ≥ 40 years, erythrocyte sedimentation rate (ESR) ≤ 20 mm/h and Bath Ankylosing Spondylitis Functional Index (BASFI) < 4 had statistically significant lower serum sclerostin concentrations compared to controls. Chinese and Korean AS patients as well as patients with lower CRP had higher serum BMP-2 levels than controls, and country may be a source of heterogeneity across the studies. No publication bias existed and sensitivity analysis confirmed the stability of results. Serum BMP-2, but not sclerostin levels may be closely related to the development of AS.
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Affiliation(s)
- Jiajia Yang
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, 230032, Anhui, People's Republic of China
- The Key Laboratory of Major Autoimmune Diseases, Anhui Medical University, 81 Meishan Road, Hefei, 230032, Anhui, People's Republic of China
| | - Shanshan Xu
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, 230032, Anhui, People's Republic of China
- The Key Laboratory of Major Autoimmune Diseases, Anhui Medical University, 81 Meishan Road, Hefei, 230032, Anhui, People's Republic of China
| | - Mengya Chen
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, 230032, Anhui, People's Republic of China
- The Key Laboratory of Major Autoimmune Diseases, Anhui Medical University, 81 Meishan Road, Hefei, 230032, Anhui, People's Republic of China
| | - Yaping Yuan
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, 230032, Anhui, People's Republic of China
- The Key Laboratory of Major Autoimmune Diseases, Anhui Medical University, 81 Meishan Road, Hefei, 230032, Anhui, People's Republic of China
| | - Xu Zhang
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, 230032, Anhui, People's Republic of China
- The Key Laboratory of Major Autoimmune Diseases, Anhui Medical University, 81 Meishan Road, Hefei, 230032, Anhui, People's Republic of China
| | - Yubo Ma
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, 230032, Anhui, People's Republic of China
- The Key Laboratory of Major Autoimmune Diseases, Anhui Medical University, 81 Meishan Road, Hefei, 230032, Anhui, People's Republic of China
| | - Meng Wu
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, 230032, Anhui, People's Republic of China
- The Key Laboratory of Major Autoimmune Diseases, Anhui Medical University, 81 Meishan Road, Hefei, 230032, Anhui, People's Republic of China
| | - Renfang Han
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, 230032, Anhui, People's Republic of China
- The Key Laboratory of Major Autoimmune Diseases, Anhui Medical University, 81 Meishan Road, Hefei, 230032, Anhui, People's Republic of China
| | - Xingxing Hu
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, 230032, Anhui, People's Republic of China
- The Key Laboratory of Major Autoimmune Diseases, Anhui Medical University, 81 Meishan Road, Hefei, 230032, Anhui, People's Republic of China
| | - Rui Liu
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, 230032, Anhui, People's Republic of China
- The Key Laboratory of Major Autoimmune Diseases, Anhui Medical University, 81 Meishan Road, Hefei, 230032, Anhui, People's Republic of China
| | - Jixiang Deng
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, 230032, Anhui, People's Republic of China
- The Key Laboratory of Major Autoimmune Diseases, Anhui Medical University, 81 Meishan Road, Hefei, 230032, Anhui, People's Republic of China
| | - Shiyang Guan
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, 230032, Anhui, People's Republic of China
- The Key Laboratory of Major Autoimmune Diseases, Anhui Medical University, 81 Meishan Road, Hefei, 230032, Anhui, People's Republic of China
| | - Xing Gao
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, 230032, Anhui, People's Republic of China
- The Key Laboratory of Major Autoimmune Diseases, Anhui Medical University, 81 Meishan Road, Hefei, 230032, Anhui, People's Republic of China
| | - Meijuan Pan
- Department of Rheumatism and Immunity, The First Affiliated Hospital of Anhui Medical University, Hefei, 230022, Anhui, People's Republic of China
| | - Shengqian Xu
- Department of Rheumatism and Immunity, The First Affiliated Hospital of Anhui Medical University, Hefei, 230022, Anhui, People's Republic of China
| | - Zongwen Shuai
- Department of Rheumatism and Immunity, The First Affiliated Hospital of Anhui Medical University, Hefei, 230022, Anhui, People's Republic of China
| | - Shanqun Jiang
- School of Life Sciences, Anhui University, 111 Jiulong Road, Hefei, 230601, People's Republic of China
| | - Shihe Guan
- Department of Clinical Laboratory, The Second Hospital of Anhui Medical University, NO. 678#, Furong Road, Hefei, 230601, Anhui, People's Republic of China
| | - Liwen Chen
- Department of Clinical Laboratory, The Second Hospital of Anhui Medical University, NO. 678#, Furong Road, Hefei, 230601, Anhui, People's Republic of China
| | - Faming Pan
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, 230032, Anhui, People's Republic of China.
- The Key Laboratory of Major Autoimmune Diseases, Anhui Medical University, 81 Meishan Road, Hefei, 230032, Anhui, People's Republic of China.
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Singh A, Gupta MK, Mishra SP. Study of correlation of level of expression of Wnt signaling pathway inhibitors sclerostin and dickkopf-1 with disease activity and severity in rheumatoid arthritis patients. Drug Discov Ther 2019; 13:22-27. [PMID: 30880318 DOI: 10.5582/ddt.2019.01011] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
This study was done with aim to assess the serum sclerostin and dickkopf-1 (DKK-1) level in patients of rheumatoid arthritis (RA) and to correlate their level with disease activity and bone mineral density. Fifty patients of RA and equal age and sex matched healthy controls were included in the study. Patients were evaluated clinically and investigated with routine blood tests along with rheumatoid factor (RF), anti-citrullinated protein antibody (anti-CCP2), radiographs and bone mineral density (BMD). Serum sclerostin and DKK-1 levels of both cases and controls was assayed by using enzyme-linked immunosorbent assay (ELISA) assay [RayBio®, Georgia, USA with coefficient of variation percent (CV %), < 10%] and compared with disease activity and bone mineral density. Disease activity was measured by Disease Activity Score 28 (DAS28) along with Modified Health Assessment Questionnaire (MHAQ) score. Mean serum sclerostin and DKK-1 was significantly higher in study group as compared to control group. Serum sclerostin showed significant correlation with disease activity scores (DAS score and MHAQ score), erythrocyte sedimentation rate (ESR) and C-reactive protein (CRP) level. Serum sclerostin at level of 394 pg/mL was found to have diagnostic significance with sensitivity of 100% and specificity of 90%. DKK-1 level shows significantly positive correlation with larson score which denotes radiological progression (r value 0.468; p value 0.001). More studies with larger sample size of RA patients are needed for better determination of the role of sclerostin and DKK-1 in RA. Also, the correlation of these and other bone turn over markers will help decipher their role with disease progression in RA patients.
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Affiliation(s)
- Anup Singh
- Department of Geriatric Medicine, Institute of Medical Sciences, Banaras Hindu University
| | - Manish Kumar Gupta
- Department of General Medicine, Institute of Medical Sciences, Banaras Hindu University
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Idolazzi L, El Ghoch M, Dalle Grave R, Bazzani PV, Calugi S, Fassio S, Caimmi C, Viapiana O, Bertoldo F, Braga V, Rossini M, Gatti D. Bone metabolism in patients with anorexia nervosa and amenorrhoea. Eat Weight Disord 2018; 23:255-261. [PMID: 27787773 DOI: 10.1007/s40519-016-0337-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Accepted: 10/17/2016] [Indexed: 12/23/2022] Open
Abstract
PURPOSE Aim of this study is focusing on bone metabolism in AN patients with amenorrhoea and related estrogen deficiency effects. METHODS AN patients were compared both with healthy females and with postmenopausal women (reference model for estrogen deficiency). The study sample included 81 females with AN. Laboratory tests [25-OH vitamin D, bone turnover markers, intact parathyroid hormone, sclerostin (SOST) and dickkopf-related protein (DKK1)] and dual energy X-ray absorptiometry (DXA) were taken into account. RESULTS AN patients had higher levels of C-terminal telopeptide of type I collagen (CTX) than both control groups. AN adolescents had CTX higher than AN young adults. In postmenopausal women, intact N-propeptide of type I collagen was higher if compared with each other group. In AN groups, Dickkopf-related protein 1 was significantly lower than the two control groups. No differences were found in sclerostin except in adolescents. In AN adolescents, DXA values at femoral sites were higher than in AN young adults and a positive correlation was found with body weight (p < 0.01) and with fat mass evaluated using DXA (p < 0.01). CONCLUSIONS AN women with amenorrhoea have an increased bone resorption like postmenopausal women but bone formation is depressed. The consequent remodeling uncoupling is considerably more severe than that occurring after menopause.
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Affiliation(s)
- L Idolazzi
- Unit of Rheumatology, University of Verona, P.le L. Scuro 2, 37134, Verona, Italy.
| | - M El Ghoch
- Department of Eating and Weight Disorders, Villa Garda Hospital, Via Montebaldo, 89, Garda, 37016, Verona, Italy
| | - R Dalle Grave
- Department of Eating and Weight Disorders, Villa Garda Hospital, Via Montebaldo, 89, Garda, 37016, Verona, Italy
| | - P V Bazzani
- Department of Eating and Weight Disorders, Villa Garda Hospital, Via Montebaldo, 89, Garda, 37016, Verona, Italy
| | - S Calugi
- Department of Eating and Weight Disorders, Villa Garda Hospital, Via Montebaldo, 89, Garda, 37016, Verona, Italy
| | - S Fassio
- Unit of Rheumatology, University of Verona, P.le L. Scuro 2, 37134, Verona, Italy
| | - C Caimmi
- Unit of Rheumatology, University of Verona, P.le L. Scuro 2, 37134, Verona, Italy
| | - O Viapiana
- Unit of Rheumatology, University of Verona, P.le L. Scuro 2, 37134, Verona, Italy
| | - F Bertoldo
- Internal Medicine, University of Verona, P.le L. Scuro 2, 37134, Verona, Italy
| | - V Braga
- Unit of Rheumatology, University of Verona, P.le L. Scuro 2, 37134, Verona, Italy
| | - M Rossini
- Unit of Rheumatology, University of Verona, P.le L. Scuro 2, 37134, Verona, Italy
| | - D Gatti
- Unit of Rheumatology, University of Verona, P.le L. Scuro 2, 37134, Verona, Italy
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Varley I, Hughes DC, Greeves JP, Stellingwerff T, Ranson C, Fraser WD, Sale C. The association of novel polymorphisms with stress fracture injury in Elite Athletes: Further insights from the SFEA cohort. J Sci Med Sport 2018; 21:564-8. [PMID: 29129460 DOI: 10.1016/j.jsams.2017.10.038] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Revised: 09/24/2017] [Accepted: 10/31/2017] [Indexed: 12/27/2022]
Abstract
OBJECTIVES To determine, in conjunction with a wider investigation, whether 11 genetic variants in the vicinity of vitamin D, collagen and Wnt signalling pathways were associated with stress fracture injury in the Stress Fracture Elite Athlete (SFEA) cohort. DESIGN Genotype-phenotype association study. METHODS Self-reported stress fracture history and demographic data were recorded in 518 elite athletes, 449 male and 69 female (mean age 24.2±5.5 years) from the SFEA cohort. Elite athletes were assigned to two groups based on history of stress fracture injury. Data were analysed for the whole cohort and sub-stratified in to male only and multiple stress fracture cases. Genotype was determined using a proprietary fluorescence-based competitive allele-specific polymerase chain reaction assay. RESULTS SOST SNP rs1877632 and VDR SNPs rs10735810 and rs731236 were associated with stress fracture (p<0.05). In the whole cohort, rs1877632 heterozygotes and homozygotes of the rare allele combined made up 59% of stress fracture sufferers in comparison to 46% in the non-stress fracture group (p=0.05). In the multiple stress fracture cohort, homozygotes of the rare allele of rs10735810 and rs731236 showed an association with stress fracture when compared to those homozygotes for the common allele combined with heterozygotes (p=0.03; p=0.01). No significant associations were shown in the other SNPs analysed (p>0.05). CONCLUSIONS These data suggest an important role for SOST SNP rs1877632 and VDR SNPs rs10735810 and rs731236 in the pathophysiology of stress fracture. This might be due to the role of the SNPs in the regulation of bone remodelling and adaptation to mechanical loading, with potential implications for the prevention and treatment of stress fracture injuries.
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Idolazzi L, Fassio A, Tripi G, Braga V, Viapiana O, Adami G, Rossini M, Gatti D. Circulating Dickkopf-1 and sclerostin in patients with Paget’s disease of bone. Clin Rheumatol 2017; 36:925-8. [DOI: 10.1007/s10067-016-3497-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2016] [Revised: 11/22/2016] [Accepted: 11/26/2016] [Indexed: 11/26/2022]
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Athanasiadis G, Arranz L, Ziyatdinov A, Brunel H, Camacho M, Malouf J, Sosa NHD, Vila L, Casademont J, Soria JM. Exploring correlation between bone metabolism markers and densitometric traits in extended families from Spain. Bone 2016; 90:1-6. [PMID: 27241279 DOI: 10.1016/j.bone.2016.05.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Revised: 05/23/2016] [Accepted: 05/26/2016] [Indexed: 10/21/2022]
Abstract
Osteoporosis is a common multifactorial disorder characterized by low bone mass and reduced bone strength that may cause fragility fractures. In recent years, there have been substantial advancements in the biochemical monitoring of bone metabolism through the measurement of bone turnover markers. Currently, good knowledge of the genetics of such markers has become an indispensable part of osteoporosis research. In this study, we used the Genetic Analysis of Osteoporosis Project to study the genetics of the plasma levels of 12 markers related to bone metabolism and osteoporosis. Plasma phenotypes were determined through biochemical assays and log-transformed values were used together with a set of covariates to model genetic and environmental contributions to phenotypic variation, thus estimating the heritability of each trait. In addition, we studied correlations between the 12 markers and a wide variety of previously described densitometric traits. All of the 12 bone metabolism markers showed significant heritability, ranging from 0.194 for osteocalcin to 0.516 for sclerostin after correcting for covariate effects. Strong genetic correlations were observed between osteocalcin and several bone mineral densitometric traits, a finding with potentially useful diagnostic applications. In addition, suggestive genetic correlations with densitometric traits were observed for leptin and sclerostin. Overall, the few strong and several suggestive genetic correlations point out the existence of a complex underlying genetic architecture for bone metabolism plasma phenotypes and provide a strong motivation for pursuing novel whole-genome gene-mapping strategies.
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Affiliation(s)
- Georgios Athanasiadis
- Unit of Genomics of Complex Diseases, Institute of Biomedical Research, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain.
| | - Laura Arranz
- Unit of Genomics of Complex Diseases, Institute of Biomedical Research, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain
| | - Andrey Ziyatdinov
- Unit of Genomics of Complex Diseases, Institute of Biomedical Research, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain
| | - Helena Brunel
- Unit of Genomics of Complex Diseases, Institute of Biomedical Research, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain
| | - Mercedes Camacho
- Laboratory of Angiology, Vascular Biology and Inflammation, Institute of Biomedical Research, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Jorge Malouf
- Departament of Internal Medicine, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain
| | | | - Luis Vila
- Laboratory of Angiology, Vascular Biology and Inflammation, Institute of Biomedical Research, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Jordi Casademont
- Departament of Internal Medicine, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain
| | - Jose Manuel Soria
- Unit of Genomics of Complex Diseases, Institute of Biomedical Research, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain
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Prakash J, Williams FMK, Trofimov S, Surdulescu G, Spector T, Livshits G. Quantitative genetics of circulating Dickkopf-related protein 1 (DKK1) in community-based sample of UK twins. Osteoporos Int 2016; 27:2065-75. [PMID: 26762129 DOI: 10.1007/s00198-016-3486-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/17/2015] [Accepted: 01/05/2016] [Indexed: 12/19/2022]
Abstract
UNLABELLED Dickkopf-related protein 1 (DKK1) is a major inhibitor of Wnt signalling pathway but also plays an important role in bone formation. Its circulating levels appear to correlate significantly with plasma levels of inflammatory factors, fractalkine and IL-6. This study, using a large sample of UK twins, showed that the variation of each of these factors and correlation between them was explained by the genetic factors, and indicated possible association with DKK1 gene variants. INTRODUCTION DKK1 is involved in the development of several inflammatory conditions related to bone and joint degradation. Our objectives were to explore the genetic contribution (heritability) to circulating DKK1 variation and its correlation with other inflammatory cytokines, interleukin 6 (IL-6) and fractalkine, and to test whether the DKK1 heritability could be attributable to single nucleotide polymorphisms (SNPs) mapped to DKK1, IL-6 and FRCT genes. METHODS The study included a large community-based sample of 4939 women drawn from the general UK population. Plasma samples were analysed for circulating levels of DKK1, IL-6 and fractalkine (FRCT); 65 SNPs of DKK1, IL-6 and FRCT candidate genes, with MAF >0.1, were examined. We applied variance component analysis to evaluate contribution of putative genetic (including above SNPs) and environmental factors to variation of DKK1, and its correlation with IL-6 and FRCT. RESULTS Putative genetic factors explained 42.2 ± 2 % of the total variation of circulating DKK1 levels, and were also significant for fractalkine and IL-6 variations. Most importantly, we report significant phenotypic (0.208 ± 0.006-0.459 ± 0.007) and genetic (0.338 ± 0.069-0.617 ± 0.033) correlations between these molecules. We found evidence suggestive of association between the DKK1 and its structural genes variants. CONCLUSIONS Circulating DKK1 levels correlated significantly with levels of IL-6 and FRCT, known risk factors for several inflammatory processes suggesting a potential role of DKK1 in inflammation and tissue injury. Our results suggest the contribution of genetic factors in inter-individual variation of DKK1 levels in human population. However, further studies are required to determine genetic polymorphisms affecting DKK1 variation and its correlation with IL-6 and FRCT.
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Affiliation(s)
- J Prakash
- Human Population Biology Research Unit, Department of Anatomy and Anthropology, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, 69978, Israel
| | - F M K Williams
- Department of Twin Research and Genetic Epidemiology, King's College London, Strand, London, UK
| | - S Trofimov
- Human Population Biology Research Unit, Department of Anatomy and Anthropology, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, 69978, Israel
| | - G Surdulescu
- Department of Twin Research and Genetic Epidemiology, King's College London, Strand, London, UK
| | - T Spector
- Department of Twin Research and Genetic Epidemiology, King's College London, Strand, London, UK
| | - G Livshits
- Human Population Biology Research Unit, Department of Anatomy and Anthropology, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, 69978, Israel.
- Department of Twin Research and Genetic Epidemiology, King's College London, Strand, London, UK.
- Lilian and Marcel Pollak Chair of Biological Anthropology, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.
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Qi Z, Liu W, Lu J. The mechanisms underlying the beneficial effects of exercise on bone remodeling: Roles of bone-derived cytokines and microRNAs. Prog Biophys Mol Biol 2016; 122:131-139. [PMID: 27179638 DOI: 10.1016/j.pbiomolbio.2016.05.010] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Revised: 05/02/2016] [Accepted: 05/07/2016] [Indexed: 12/31/2022]
Abstract
Bone remodeling is highly dynamic and complex in response to mechanical loading, such as exercise. In this review, we concluded that a number of individual factors are disturbing the clinical effects of exercise on bone remodeling. We updated the progress made on the differentiation of osteoblasts and osteoclasts in response to mechanical loading, hoping to provide a theoretical basis to improve bone metabolism with exercise. Increasing evidences indicate that bone is not only a structural scaffold but also an endocrine organ, which secretes osteocalcin and FGF23. Both of them have been known as a circulating hormone to promote insulin sensitivity and reduce body fat mass. The effects of exercise on these bone-derived cytokines provide a better understanding of how exercise-induced "osteokine" affects the whole-body homeostasis. Additionally, we discussed recent studies highlighting the post-transcriptional regulation of microRNAs in bone remodeling. We focus on the involvement of the microRNAs in osteoblastogenesis and osteoclastogenesis, and suggest that microRNAs may be critical for exercise-induced bone remodeling.
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Affiliation(s)
- Zhengtang Qi
- The Key Laboratory of Adolescent Health Assessment and Exercise Intervention (East China Normal University), Ministry of Education, Shanghai 200241, China; School of Physical Education and Health, East China Normal University, Shanghai 200241, China
| | - Weina Liu
- The Key Laboratory of Adolescent Health Assessment and Exercise Intervention (East China Normal University), Ministry of Education, Shanghai 200241, China; School of Physical Education and Health, East China Normal University, Shanghai 200241, China.
| | - Jianqiang Lu
- School of Kinesiology, Shanghai University of Sport, Shanghai 200438, China.
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El-Bakry S, Saber N, Zidan H, Samaha D. Sclerostin as an innovative insight towards understanding Rheumatoid Arthritis. The Egyptian Rheumatologist 2016. [DOI: 10.1016/j.ejr.2015.05.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Abstract
PURPOSE OF REVIEW Discovery of the Wnt signaling pathway and understanding the central role of osteocyte in skeletal homeostasis have been the major advances in skeletal biology over the past decade. Sclerostin, secreted mainly (but not exclusively) by osteocytes, has emerged as a key player in skeletal homeostasis. This review highlights the most relevant recent advances. RECENT FINDINGS Sclerostin by inhibiting Wnt signaling pathway decreases bone formation and osteoblast differentiation and promotes osteoblast apoptosis. Ability to measure serum sclerostin levels better clarified the role of sclerostin in various physiologic and pathologic states. Early clinical trials with antibodies to sclerostin have produced robust increases in bone mineral density, and fracture prevention trials are underway. SUMMARY Since the discovery of Wnt signaling pathway and sclerostin's association with high bone mass, there has been a remarkable progress. Clinical trials with fracture endpoints, already underway, should expand osteoanabolic therapeutic horizon in the very near future. Measurement of sclerostin levels in a number of conditions has advanced our knowledge about pathophysiology of skeletal and nonskeletal disorders in an altogether new light.
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Affiliation(s)
- Mahalakshmi Honasoge
- aDivision of Endocrinology, Diabetes, and Bone & Mineral Disorders, Henry Ford Hospital, Detroit, Michigan bSection of Endocrinology, Diabetes and Metabolism, Temple University School of Medicine, Philadelphia, Pennslyvania cBone and Mineral Research Laboratory, Henry Ford Hospital, Detroit, Michigan, USA
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Abstract
Sex steroids are chief regulators of gender differences in the skeleton, and male gender is one of the strongest protective factors against osteoporotic fractures. This advantage in bone strength relies mainly on greater cortical bone expansion during pubertal peak bone mass acquisition and superior skeletal maintenance during aging. During both these phases, estrogens acting via estrogen receptor-α in osteoblast lineage cells are crucial for male cortical and trabecular bone, as evident from conditional genetic mouse models, epidemiological studies, rare genetic conditions, genome-wide meta-analyses, and recent interventional trials. Genetic mouse models have also demonstrated a direct role for androgens independent of aromatization on trabecular bone via the androgen receptor in osteoblasts and osteocytes, although the target cell for their key effects on periosteal bone formation remains elusive. Low serum estradiol predicts incident fractures, but the highest risk occurs in men with additionally low T and high SHBG. Still, the possible clinical utility of serum sex steroids for fracture prediction is unknown. It is likely that sex steroid actions on male bone metabolism rely also on extraskeletal mechanisms and cross talk with other signaling pathways. We propose that estrogens influence fracture risk in aging men via direct effects on bone, whereas androgens exert an additional antifracture effect mainly via extraskeletal parameters such as muscle mass and propensity to fall. Given the demographic trends of increased longevity and consequent rise of osteoporosis, an increased understanding of how sex steroids influence male bone health remains a high research priority.
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Affiliation(s)
- Dirk Vanderschueren
- Clinical and Experimental Endocrinology (D.V.) and Gerontology and Geriatrics (M.R.L., E.G.), Department of Clinical and Experimental Medicine; Laboratory of Molecular Endocrinology, Department of Cellular and Molecular Medicine (M.R.L., F.C.); and Centre for Metabolic Bone Diseases (D.V., M.R.L., E.G.), KU Leuven, B-3000 Leuven, Belgium; and Center for Bone and Arthritis Research (M.K.L., L.V., A.E.B., C.O.), Department of Internal Medicine and Clinical Nutrition, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, 413 45 Gothenburg, Sweden
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Brabnikova-Maresova K, Jarosova K, Pavelka K, Stepan JJ. Serum sclerostin in high-activity adult patients with juvenile idiopathic arthritis. Arthritis Res Ther 2014; 16:460. [PMID: 25280749 PMCID: PMC4236454 DOI: 10.1186/s13075-014-0460-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2014] [Accepted: 09/19/2014] [Indexed: 12/18/2022] Open
Abstract
Introduction Juvenile idiopathic arthritis (JIA) is a disease associated with loss of bone mass, deterioration in bone mass quality and an increased risk of fractures. The objective of this study was to evaluate factors that predict bone mineral density (BMD) alterations in young adult patients with active JIA before and during therapy with tumour necrosis factor α (TNFα) inhibitors. Methods Thirty-one patients (twelve males and nineteen females; mean age =25.1 ± 6.1 years) with active JIA (mean Disease Activity Score in 28 joints (DAS28) =6.36 ± 0.64; mean high-sensitivity C-reactive protein (hsCRP) =18.36 ± 16.95 mg/L) were investigated. The control group consisted of 84 healthy individuals matched by sex and age. BMD, bone turnover markers and serum concentrations of soluble receptor activator of nuclear factor κB ligand, osteoprotegerin, dickkopf Wnt signalling pathway inhibitor 1 (Dkk1) and sclerostin were evaluated. Results Baseline BMD values in the lumbar spine, proximal femur, femoral neck and distal radius were significantly lower in patients with JIA compared to healthy control participants. Baseline sclerostin serum concentrations were significantly higher in patients with JIA compared to control participants. After 2 years of treatment with TNFα inhibitors, BMD was significantly increased in the lumbar spine. This increase correlated with a drop in DAS28 score. A statistically significant correlation between hsCRP and Dkk1 was found at baseline, as well as during the 2-year follow-up period. A significant reduction in serum sclerostin after 1 year of therapy was predictive of a drop in DAS28 score observed with a 1-year delay after reduction of serum sclerostin. Conclusion A significant correlation between the sclerostin serum concentration and the number of tender and swollen joints, but not BMD, supports the hypothesis that chondrocytes and cells of the subchondral bone may contribute to circulating sclerostin in JIA.
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Abstract
Over the last 15 years several biological markers of bone turnover have been developed with increased specificity and sensitivity. In osteoporosis clinical studies, the IOF and IFCC organizations have recently recommended the measurements of serum type I collagen N-propeptide (PINP) and the crosslinked C-terminal telopeptide (serum CTX) as markers of bone formation and bone resorption, respectively. However these markers have some limitations including a lack of specificity for bone tissue, their inability to reflect osteocyte activity or periosteal apposition. In addition they do not allow the investigation of bone tissue quality an important determinant of skeletal fragility. To address these limitations, new developments in markers of bone metabolism have been recently achieved. These include assays for periostin, a matricellular protein preferentially localized in the periosteal tissue, sphingosine 1-phosphate, a lipid mediator which acts mainly on osteoclastogenesis and the osteocyte factors such as sclerostin and FGF-23. Recent studies have shown an association between the circulating levels of these biological markers and fracture risk in postmenopausal women or elderly men, although data require confirmation in additional prospective studies. Finally, recent studies suggest that the measurements of circulating microRNAs may represent a novel class of early biological markers in osteoporosis. It is foreseen that with the use of genomics and proteomics, new markers will be developed to ultimately improve the management of patients with osteoporosis.
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Affiliation(s)
- Patrick Garnero
- INSERM Research Unit 1033, University of Lyon, France and Cisbio Bioassays, Codolet, France.
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