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Wu S, Bai X, Cai L, Ke Q, Zhang X. Dehydrocostus lactone (DHC) promotes osteoblastic differentiation and mineralization through p38/RUNX-2 signaling. J Biochem Mol Toxicol 2024; 38:e23601. [PMID: 38069819 DOI: 10.1002/jbt.23601] [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: 03/07/2023] [Revised: 09/09/2023] [Accepted: 11/20/2023] [Indexed: 01/18/2024]
Abstract
Dysregulation of osteoblastic differentiation is an important risk factor of osteoporosis, the therapy of which is challenging. Dehydrocostus lactone (DHC), a sesquiterpene isolated from medicinal plants, has displayed anti-inflammatory and antitumor properties. In this study, we investigated the effects of DHC on osteoblastic differentiation and mineralization of MC3T3-E1 cells. Interestingly, we found that DHC increased the expression of marker genes of osteoblastic differentiation, such as alkaline phosphatase (ALP), osteocalcin (OCN), and osteopontin (OPN). Additionally, DHC increased the expressions of collagen type I alpha 1 (Col1a1) and collagen type I alpha 2 (Col1a2). We also demonstrate that DHC increased ALP activity. Importantly, the Alizarin Red S staining assay revealed that DHC enhanced osteoblastic differentiation of MC3T3-E1 cells. Mechanistically, it is shown that DHC increased the expression of Runx-2, a central regulator of osteoblastic differentiation. Treatment with DHC also increased the levels of phosphorylated p38, and its blockage using its specific inhibitor SB203580 abolished the effects of DHC on runt-related transcription factor 2 (Runx-2) expression and osteoblastic differentiation, suggesting the involvement of p38. Based on these findings, we concluded that DHC might possess a capacity for the treatment of osteoporosis by promoting osteoblastic differentiation.
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Affiliation(s)
- Shiqiang Wu
- Department of Orthopaedic, The Second Affiliated Hospital of Fujian Medical University, Quanzhou, China
| | - Xiaoming Bai
- The Second Clinical College, Fujian Medical University, Quanzhou, China
| | - Liquan Cai
- Department of Orthopaedic, The Second Affiliated Hospital of Fujian Medical University, Quanzhou, China
| | - Qingfeng Ke
- Department of Orthopaedic, The Second Affiliated Hospital of Fujian Medical University, Quanzhou, China
| | - Xiaolu Zhang
- Department of Orthopaedic, The Second Affiliated Hospital of Fujian Medical University, Quanzhou, China
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Agrawal AC, Garg AK. Epidemiology of Osteoporosis. Indian J Orthop 2023; 57:45-48. [PMID: 38107804 PMCID: PMC10721571 DOI: 10.1007/s43465-023-01012-3] [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: 08/30/2023] [Accepted: 09/26/2023] [Indexed: 12/19/2023]
Abstract
Background India has a population capacity of 1.2 billion people. With a worldwide aging population, the prevention and management of osteoporosis has become a significant healthcare challenge. It is crucial to recognize the factors impacting poor bone health and appreciate the many hurdles to treat the disease to provide a better quality of life and decrease the financial burden on healthcare. Purpose In this review article, we discuss the epidemiology of osteoporosis and address the definition, incidence, and prevalence, geographical variation in the occurrence of osteoporosis, and the risk factors for osteoporosis. Methods Search terms using various combinations of the keywords 'osteoporosis,' 'epidemiology,' 'incidence,' 'prevalence,' 'fracture,' 'India,' 'world,' 'screening,' and 'FRAX' was done to review all relevant literature till June 2023. Results & Conclusion India has a recent estimate of population capacity of 1.2 billion people. Various studies have revealed an osteoporosis prevalence in Indian women ranging from 8% to 62%. Poor dietary calcium intake, low vitamin D, and lifestyle changes contribute to osteoporosis.
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Affiliation(s)
- Alok Chandra Agrawal
- Department of Orthopaedics, All India Institute of Medical Sciences, Raipur, India
| | - Ankit Kumar Garg
- Department of Orthopaedics, All India Institute of Medical Sciences, Raipur, India
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Liu Q, Tooki T, Di D, Zhou H, Cui Z, Zhang R, Zhang J, Yuan T, Zhou T, Luo X, Ling D, Wang Q. Role of lifestyle factors in mediating the effect of educational attainment on bone mineral density: a Mendelian randomization study. Arch Osteoporos 2023; 18:120. [PMID: 37723362 DOI: 10.1007/s11657-023-01329-4] [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: 03/18/2023] [Accepted: 09/07/2023] [Indexed: 09/20/2023]
Abstract
We performed two-step multivariable Mendelian randomization analysis to explore the mediating role of lifestyle factors in educational attainment (EA) and bone mineral density (BMD). Summary statistics from genome-wide association studies of European lineages were used. Coffee intake and processed-meat intake mediated the association between EA and BMD. PURPOSE This study aimed to explore the causal relationship between educational attainment (EA) and bone mineral density (BMD), as well as the potential mediating roles of lifestyle factors in the expected EA-BMD relationship. By identifying modifiable lifestyle factors, we hope to provide relevant information to prevent osteoporosis or low BMD in the less educated population. METHODS Using summary statistics from genome-wide association studies (GWAS) of major European lineages, one- and two-sample Mendelian randomization (MR) analyses were performed to estimate the association between EA (in the social sciences genetic association consortium (SSGAC) involving 766,345 individuals and in the UK Biobank (UKB) involving 293,723 individuals) and BMD (in the Genetic Factors for Osteoporosis Consortium involving 426,824 individuals selected from the UKB). The EA variable in both consortia were expressed by years of schooling completed. Two-step multivariable MR was used to assess the mediating roles of eight lifestyle-related factors (moderate-to-vigorous physical activity, watching television, computer using, smoking initiation, coffee intake, alcohol intake frequency, tea intake, and processed-meat intake) in the EA and BMD association, and the corresponding mediating proportion was calculated. Meta-analysis was used to present a pooled estimate. RESULTS A total of 317 and 73 independent single-nucleotide polymorphisms (SNPs) of GWAS significance (P < 5.0 × 10-8) were selected as instrumental variables (IVs) for EA in the SSGAC and UKB, respectively. A total of 513 SNPs were selected as IVs for the BMD. The results of one- and two-sample MR revealed that the genetically predicted BMD increased by 0.094 and 0.047 g/cm2, respectively, in response to each SD increment of genetically predicted schooling years. Among the eight candidate mediators, coffee intake and processed-meat intake were potential mediators revealed by the two-step multivariable MR analysis, mediating 26.87% and 23.92% of EA's effect on BMD, respectively. Meta-analysis showed consistent findings. Results of sensitivity analysis indicated the robustness of our findings. CONCLUSION We elucidated the causal protective effect of EA on BMD and the mediating roles of coffee intake and processed-meat intake. Intervening with these factors can potentially reduce the burden of bone density loss or osteoporotic fractures among the less educated population.
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Affiliation(s)
- Qian Liu
- Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, Department of Epidemiology and Biostatistics, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Tiaeki Tooki
- Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, Department of Epidemiology and Biostatistics, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Dongsheng Di
- Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, Department of Epidemiology and Biostatistics, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Haolong Zhou
- Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, Department of Epidemiology and Biostatistics, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Zhangbo Cui
- Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, Department of Epidemiology and Biostatistics, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Ruyi Zhang
- Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, Department of Epidemiology and Biostatistics, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jianli Zhang
- Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, Department of Epidemiology and Biostatistics, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Tingting Yuan
- Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, Department of Epidemiology and Biostatistics, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Tingting Zhou
- Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, Department of Epidemiology and Biostatistics, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xiao Luo
- Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, Department of Epidemiology and Biostatistics, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Danyang Ling
- Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, Department of Epidemiology and Biostatistics, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Qi Wang
- Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, Department of Epidemiology and Biostatistics, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
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Yu W, Wang HL, Zhang J, Yin C. The effects of epigenetic modifications on bone remodeling in age-related osteoporosis. Connect Tissue Res 2023; 64:105-116. [PMID: 36271658 DOI: 10.1080/03008207.2022.2120392] [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] [Indexed: 02/03/2023]
Abstract
PURPOSE As the population ages, there is an increased risk of fracture and morbidity diseases associated with aging, such as age-related osteoporosis and other bone diseases linked to aging skeletons. RESULTS Several bone-related cells, including multipotent bone mesenchymal stem cells, osteoblasts that form bone tissue, and osteoclasts that break it down, are in symbiotic relationships throughout life. Growing evidence indicates that epigenetic modifications of cells caused by aging contribute to compromised bone remodeling and lead to osteoporosis. A number of epigenetic mechanisms are at play, including DNA/RNA modifications, histone modifications, microRNAs (miRNAs), and long noncoding RNAs (lncRNAs), as well as chromatin remodeling. CONCLUSION In this review, we summarized the epigenetic modifications of different bone-related cells during the development and progression of osteoporosis associated with aging. Additionally, we described a compensatory recovery mechanism under epigenetic regulation that may lead to new strategies for regulating bone remodeling in age-related osteoporosis.
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Affiliation(s)
- Wenyue Yu
- School and Hospital of Stomatology, Liaoning Provincial Key Laboratory of Oral Diseases, China Medical University, Shenyang, China
| | - He-Ling Wang
- Department of Clinical Molecular Biology, University of Oslo and Akershus University Hospital, Lørenskog, Norway
| | - Jianying Zhang
- Xiangya School of Stomatology, Central South University, Changsha, China
| | - Chengcheng Yin
- School and Hospital of Stomatology, Liaoning Provincial Key Laboratory of Oral Diseases, China Medical University, Shenyang, China
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Xu C, Weng Z, Liu Q, Xu J, Liang J, Li W, Hu J, Huang T, Zhou Y, Gu A. Association of air pollutants and osteoporosis risk: The modifying effect of genetic predisposition. ENVIRONMENT INTERNATIONAL 2022; 170:107562. [PMID: 36228550 DOI: 10.1016/j.envint.2022.107562] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Revised: 09/20/2022] [Accepted: 10/02/2022] [Indexed: 06/16/2023]
Abstract
BACKGROUND Limited studies have examined the association between air pollutants and osteoporosis incidence; however, the results are conflicting. We aimed to quantify the effects of selected air pollutants on osteoporosis risk and explore the modifying effect of genetic predisposition. METHODS A total of 422,955 subjects who did not have osteoporosis at baseline in the UK Biobank were included from 2006 to 2010. We conducted a Cox proportional hazards model with adjustment for covariates to examine the association between air pollutant scores and individual air pollutants and incident osteoporosis. Furthermore, a polygenic risk score (PRS) of osteoporosis was built and examined to determine whether genetic susceptibility modified the effect of air pollutants on osteoporosis. The relationship between air pollutants and osteoporosis was examined by using a restricted cubic spline (RCS) method. RESULTS After confounder adjustment, the results showed a remarkable increase in the risk of osteoporosis with each 10 unit increase in exposure to air pollution (hazard ratio: 1.06, 95 % confidence interval: 1.03-1.08), PM2.5 (1.94, 1.52-2.48), NO2 (1.06, 1.02-1.10), and NOX (1.03, 1.01-1.04). However, no significant association was observed between PM10 or PM2.5-10 exposure and osteoporosis. Subjects with high air pollutant exposure levels and a high PRS had a noteworthy increase in osteoporosis risk compared to those with low air pollutant exposure levels and a low PRS. Air pollutants and genetic variants exerted additive effects on the risk of osteoporosis. Positive correlations were observed between osteoporosis and PM2.5 (P < 0.001), NO2 (P = 0.001), and NOx (P = 0.002) exposure. CONCLUSIONS Exposure to PM2.5, NO2 and NOx was associated with an increase in osteoporosis risk, and this effect was more pronounced in populations with high genetic risk. The association between PM2.5, NO2 and NOx exposure and osteoporosis is modified by genetic variations.
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Affiliation(s)
- Cheng Xu
- State Key Laboratory of Reproductive Medicine, School of Public Health, Nanjing Medical University, Nanjing, China; Key Laboratory of Modern Toxicology of Ministry of Education, Center for Global Health, Nanjing Medical University, Nanjing, China
| | - Zhenkun Weng
- State Key Laboratory of Reproductive Medicine, School of Public Health, Nanjing Medical University, Nanjing, China; Key Laboratory of Modern Toxicology of Ministry of Education, Center for Global Health, Nanjing Medical University, Nanjing, China
| | - Qian Liu
- State Key Laboratory of Reproductive Medicine, School of Public Health, Nanjing Medical University, Nanjing, China; Key Laboratory of Modern Toxicology of Ministry of Education, Center for Global Health, Nanjing Medical University, Nanjing, China
| | - Jin Xu
- State Key Laboratory of Reproductive Medicine, School of Public Health, Nanjing Medical University, Nanjing, China; Key Laboratory of Modern Toxicology of Ministry of Education, Center for Global Health, Nanjing Medical University, Nanjing, China; Department of Maternal, Child, and Adolescent Health, School of Public Health, Nanjing Medical University, Nanjing, China
| | - Jingjia Liang
- State Key Laboratory of Reproductive Medicine, School of Public Health, Nanjing Medical University, Nanjing, China; Key Laboratory of Modern Toxicology of Ministry of Education, Center for Global Health, Nanjing Medical University, Nanjing, China
| | - Wenxiang Li
- State Key Laboratory of Reproductive Medicine, School of Public Health, Nanjing Medical University, Nanjing, China; Key Laboratory of Modern Toxicology of Ministry of Education, Center for Global Health, Nanjing Medical University, Nanjing, China
| | - Jia Hu
- State Key Laboratory of Reproductive Medicine, School of Public Health, Nanjing Medical University, Nanjing, China; Suzhou Institute of Advanced Study in Public Health, Gusu School, Nanjing Medical University, Suzhou, China; Suzhou Center for Disease Prevention and Control, Suzhou, China
| | - Tao Huang
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing, China
| | - Yong Zhou
- CAS Key Laboratory of Tissue Microenvironment and Tumor, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China.
| | - Aihua Gu
- State Key Laboratory of Reproductive Medicine, School of Public Health, Nanjing Medical University, Nanjing, China; Key Laboratory of Modern Toxicology of Ministry of Education, Center for Global Health, Nanjing Medical University, Nanjing, China.
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Modulation of Endocannabinoid Tone in Osteoblastic Differentiation of MC3T3-E1 Cells and in Mouse Bone Tissue over Time. Cells 2021; 10:cells10051199. [PMID: 34068882 PMCID: PMC8157192 DOI: 10.3390/cells10051199] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Revised: 05/06/2021] [Accepted: 05/10/2021] [Indexed: 11/17/2022] Open
Abstract
Bone is a highly complex and metabolically active tissue undergoing a continuous remodeling process, which endures throughout life. A complex cell-signaling system that plays role in regulating different physiological processes, including bone remodeling, is the endocannabinoid system (ECS). Bone mass expresses CB1 and CB2 cannabinoid receptors and enzymatic machinery responsible for the metabolism of their endogenous ligands, endocannabinoids (AEA and 2-AG). Exogenous AEA is reported to increase the early phase of human osteoblast differentiation in vitro. However, regarding this cell context little is known about how endocannabinoids and endocannabinoid-related N-acylethanolamines like PEA and OEA are modulated, in vitro, during cell differentiation and, in vivo, over time up to adulthood. Here we characterized the endocannabinoid tone during the different phases of the osteoblast differentiation process in MC3T3-E1 cells, and we measured endocannabinoid levels in mouse femurs at life cycle stages characterized by highly active bone growth (i.e., of juvenile, young adult, and mature adult bone). Endocannabinoid tone was significantly altered during osteoblast differentiation, with substantial OEA increment, decline in 2-AG and AEA, and consistent modulation of their metabolic enzymes in maturing and mineralized MC3T3-E1 cells. Similarly, in femurs, we found substantial, age-related, decline in 2-AG, OEA, and PEA. These findings can expand existing knowledge underlying physiological bone cell function and contribute to therapeutic strategies for preventing bone-related metabolic changes accruing through lifespan.
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Tong J, Zhang M, Li X, Ren G. MicroRNA‑338‑3p regulates age‑associated osteoporosis via targeting PCSK5. Mol Med Rep 2021; 23:136. [PMID: 33313955 PMCID: PMC7751475 DOI: 10.3892/mmr.2020.11775] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Accepted: 10/14/2020] [Indexed: 12/18/2022] Open
Abstract
Bone loss is a disease that is highly associated with aging. This deleterious health condition has become a public concern worldwide, and there is an urgent need to discover more novel therapeutic strategies for the development of age‑associated osteoporosis. The present study aimed to explore the association between proprotein convertase subtilisin/kexin type 5 (PCSK5) and microRNA(miR)‑338‑3p in bone‑formation and bone‑loss processes. Western blotting assay and reverse transcription‑quantitative PCR were employed to analyze PCSK5 and miR‑338‑3p expression levels in bone mesenchymal stem cells (BMSCs). Dual‑luciferase reporter and RNA pull‑down assays were used to determine the target. For osteoblastic differentiation verification, alkaline phosphatase activity, osteocalcin secretion detection, bone formation‑related indicators (osterix, runt‑related gene 2, osteopontin and bone sialoprotein), hematoxylin and eosin staining and Alizarin Red S staining were performed. The findings of the present study indicated that the expression level of PCSK5 was higher in BMSCs from young rat samples, whereas the expression level of miR‑338‑3p was higher in BMSCs from samples of old rats. Experimental results also revealed that unlike miR‑338‑3p, downregulation of PCSK5 inhibited osteoblastic differentiation and osteogenesis by inhibiting alkaline phosphatase, osteocalcin, osterix, runt‑related transcription factor 2, osteopontin, bone sialoprotein and mineralized nodule formation. Overall, the results suggested that miR‑338‑3p could suppress age‑associated osteoporosis by regulating PCSK5.
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Affiliation(s)
- Jie Tong
- Department of Orthopedics, Affiliated Hospital of Jianghan University, Wuhan, Hubei 430015, P.R. China
| | - Min Zhang
- Emergency Department, Wuhan Hospital of Traditional Chinese and Western Medicine, Wuhan, Hubei 430022, P.R. China
| | - Xia Li
- Department of Ophthalmology and Otorhinolaryngology, Affiliated Hospital of Jianghan University, Wuhan, Hubei 430015, P.R. China
| | - Guohai Ren
- Department of Orthopedics, Affiliated Hospital of Jianghan University, Wuhan, Hubei 430015, P.R. China
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Simpson R, Cooper DML, Swanston T, Coulthard I, Varney TL. Historical overview and new directions in bioarchaeological trace element analysis: a review. ARCHAEOLOGICAL AND ANTHROPOLOGICAL SCIENCES 2021; 13:24. [PMID: 33520004 PMCID: PMC7810633 DOI: 10.1007/s12520-020-01262-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Accepted: 12/14/2020] [Indexed: 05/08/2023]
Abstract
Given their strong affinity for the skeleton, trace elements are often stored in bones and teeth long term. Diet, geography, health, disease, social status, activity, and occupation are some factors which may cause differential exposure to, and uptake of, trace elements, theoretically introducing variability in their concentrations and/or ratios in the skeleton. Trace element analysis of bioarchaeological remains has the potential, therefore, to provide rich insights into past human lifeways. This review provides a historical overview of bioarchaeological trace element analysis and comments on the current state of the discipline by highlighting approaches with growing momentum. Popularity for the discipline surged following preliminary studies in the 1960s to 1970s that demonstrated the utility of strontium (Sr) as a dietary indicator. During the 1980s, Sr/Ca ratio and multi-element studies were commonplace in bioarchaeology, linking trace elements with dietary phenomena. Interest in using trace elements for bioarchaeological inferences waned following a period of critiques in the late 1980s to 1990s that argued the discipline failed to account for diagenesis, simplified complex element uptake and regulation processes, and used several unsuitable elements for palaeodietary reconstruction (e.g. those under homeostatic regulation, those without a strong affinity for the skeleton). In the twenty-first century, trace element analyses have been primarily restricted to Sr and lead (Pb) isotope analysis and the study of toxic trace elements, though small pockets of bioarchaeology have continued to analyse multiple elements. Techniques such as micro-sampling, element mapping, and non-traditional stable isotope analysis have provided novel insights which hold the promise of helping to overcome limitations faced by the discipline. SUPPLEMENTARY INFORMATION The online version contains supplementary material available at 10.1007/s12520-020-01262-4.
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Affiliation(s)
- Rachel Simpson
- Department of Archaeology and Anthropology, University of Saskatchewan, Saskatoon, SK Canada
- Present Address: Department of Anthropology, University of Alberta, Edmonton, AB Canada
| | - David M. L. Cooper
- Department of Anatomy, Physiology and Pharmacology, University of Saskatchewan, Saskatoon, SK Canada
| | - Treena Swanston
- Department of Anthropology, Economics and Political Science, MacEwan University, Edmonton, AB Canada
- Department of Biological Sciences, MacEwan University, Edmonton, AB Canada
| | | | - Tamara L. Varney
- Department of Anthropology, Lakehead University, Thunder Bay, ON Canada
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Abstract
Interleukin-6 (IL-6) is a pivotal cytokine with a diverse repertoire of physiological functions that include regulation of immune cell proliferation and differentiation. Dysregulation of IL-6 signalling is associated with inflammatory and lymphoproliferative disorders such as rheumatoid arthritis and Castleman disease, and several classes of therapeutics have been developed that target components of the IL-6 signalling pathway. So far, monoclonal antibodies against IL-6 or IL-6 receptor (IL-6R) and Janus kinases (JAK) inhibitors have been successfully developed for the treatment of autoimmune diseases such as rheumatoid arthritis. However, clinical trials of agents targeting IL-6 signalling have also raised questions about the diseases and patient populations for which such agents have an appropriate benefit-risk profile. Knowledge from clinical trials and advances in our understanding of the complexities of IL-6 signalling, including the potential to target an IL-6 trans-signalling pathway, are now indicating novel opportunities for therapeutic intervention. In this Review, we overview the roles of IL-6 in health and disease and analyse progress with several approaches of inhibiting IL-6-signalling, with the aim of illuminating when and how to apply IL-6 blockade.
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van Gastel J, Boddaert J, Jushaj A, Premont RT, Luttrell LM, Janssens J, Martin B, Maudsley S. GIT2-A keystone in ageing and age-related disease. Ageing Res Rev 2018; 43:46-63. [PMID: 29452267 DOI: 10.1016/j.arr.2018.02.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Revised: 02/06/2018] [Accepted: 02/08/2018] [Indexed: 12/15/2022]
Abstract
Since its discovery, G protein-coupled receptor kinase-interacting protein 2, GIT2, and its family member, GIT1, have received considerable interest concerning their potential key roles in regulating multiple inter-connected physiological and pathophysiological processes. GIT2 was first identified as a multifunctional protein that is recruited to G protein-coupled receptors (GPCRs) during the process of receptor internalization. Recent findings have demonstrated that perhaps one of the most important effects of GIT2 in physiology concerns its role in controlling multiple aspects of the complex ageing process. Ageing can be considered the most prevalent pathophysiological condition in humans, affecting all tissue systems and acting as a driving force for many common and intractable disorders. The ageing process involves a complex interplay among various deleterious activities that profoundly disrupt the body's ability to cope with damage, thus increasing susceptibility to pathophysiologies such as neurodegeneration, central obesity, osteoporosis, type 2 diabetes mellitus and atherosclerosis. The biological systems that control ageing appear to function as a series of interconnected complex networks. The inter-communication among multiple lower-complexity signaling systems within the global ageing networks is likely coordinated internally by keystones or hubs, which regulate responses to dynamic molecular events through protein-protein interactions with multiple distinct partners. Multiple lines of research have suggested that GIT2 may act as one of these network coordinators in the ageing process. Identifying and targeting keystones, such as GIT2, is thus an important approach in our understanding of, and eventual ability to, medically ameliorate or interdict age-related progressive cellular and tissue damage.
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Jin X, Zhou B, Zhang D. Replication Study Confirms the Association of the Common rs1800629 Variant of the TNFα Gene with Postmenopausal Osteoporosis Susceptibility in the Han Chinese Population. Genet Test Mol Biomarkers 2018; 22:246-251. [PMID: 29481288 DOI: 10.1089/gtmb.2017.0204] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Affiliation(s)
- Xiaona Jin
- Department of Nursing, Xi'an International University, Xi'an, Shaanxi, China
| | - Baozhen Zhou
- Department of Nursing, Xi'an International University, Xi'an, Shaanxi, China
| | - Dangfeng Zhang
- Department of Orthopedics, The First Affiliated Hospital, Xi'an Jiaotong University, Xi'an, China
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12
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Moayyeri A, Cheung C, Tan KCB, Morris JA, Cerani A, Mohney RP, Richards JB, Hammond C, Spector TD, Menni C. Metabolomic Pathways to Osteoporosis in Middle-Aged Women: A Genome-Metabolome-Wide Mendelian Randomization Study. J Bone Miner Res 2018; 33:643-650. [PMID: 29232479 PMCID: PMC5972819 DOI: 10.1002/jbmr.3358] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/03/2017] [Revised: 11/29/2017] [Accepted: 12/04/2017] [Indexed: 12/03/2022]
Abstract
The metabolic state of the body can be a major determinant of bone health. We used a Mendelian randomization approach to identify metabolites causally associated with bone mass to better understand the biological mechanisms of osteoporosis. We tested bone phenotypes (femoral neck, total hip, and lumbar spine bone mineral density [BMD]) for association with 280 fasting blood metabolites in 6055 women from TwinsUK cohort with genomewide genotyping scans. Causal associations between metabolites and bone phenotypes were further assessed in a bidirectional Mendelian randomization study using genetic markers/scores as instrumental variables. Significant associations were replicated in 624 participants from the Hong Kong Osteoporosis Study (HKOS). Fifteen metabolites showed direct associations with bone phenotypes after adjusting for covariates and multiple testing. Using genetic instruments, four of these metabolites were found to be causally associated with hip or spine BMD. These included androsterone sulfate, epiandrosterone sulfate, 5alpha-androstan-3beta17beta-diol disulfate (encoded by CYP3A5), and 4-androsten-3beta17beta-diol disulfate (encoded by SULT2A1). In the HKOS population, all four metabolites showed significant associations with hip and spine BMD in the expected directions. No causal reverse association between BMD and any of the metabolites were found. In the first metabolome-genomewide Mendelian randomization study of human bone mineral density, we identified four novel biomarkers causally associated with BMD. Our findings reveal novel biological pathways involved in the pathogenesis of osteoporosis. © 2017 American Society for Bone and Mineral Research.
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Affiliation(s)
- Alireza Moayyeri
- Department of Twin Research & Genetic EpidemiologyKing's College LondonLondonUK
- Farr Institute of Health Informatics ResearchInstitute of Health InformaticsUniversity College LondonLondonUK
| | - Ching‐Lung Cheung
- State Key Lab of Pharmaceutical BiotechnologyHong KongChina
- Department of Pharmacology and PharmacyUniversity of Hong KongPokfulamHong KongChina
- Centre for Genomic SciencesUniversity of Hong KongPokfulamHong KongChina
| | - Kathryn CB Tan
- Department of MedicineUniversity of Hong KongPokfulamHong KongChina
| | - John A Morris
- Department of Human GeneticsMcGill UniversityMontrealCanada
- Centre for Clinical Epidemiology, Lady Davis Institute, Jewish General HospitalMcGill UniversityMontrealCanada
| | - Agustin Cerani
- Centre for Clinical Epidemiology, Lady Davis Institute, Jewish General HospitalMcGill UniversityMontrealCanada
- Department of Epidemiology Biostatistics, and Occupational HealthMcGill UniversityMontrealCanada
| | | | - J Brent Richards
- Department of Twin Research & Genetic EpidemiologyKing's College LondonLondonUK
- Department of Human GeneticsMcGill UniversityMontrealCanada
- Centre for Clinical Epidemiology, Lady Davis Institute, Jewish General HospitalMcGill UniversityMontrealCanada
- Department of Epidemiology Biostatistics, and Occupational HealthMcGill UniversityMontrealCanada
- Department of MedicineMcGill UniversityMontrealCanada
| | - Christopher Hammond
- Department of Twin Research & Genetic EpidemiologyKing's College LondonLondonUK
| | - Tim D Spector
- Department of Twin Research & Genetic EpidemiologyKing's College LondonLondonUK
| | - Cristina Menni
- Department of Twin Research & Genetic EpidemiologyKing's College LondonLondonUK
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Cheung CL, Tan KCB, Kung AWC. Cohort Profile: The Hong Kong Osteoporosis Study and the follow-up study. Int J Epidemiol 2017; 47:397-398f. [DOI: 10.1093/ije/dyx172] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/01/2017] [Indexed: 11/13/2022] Open
Affiliation(s)
- Ching-Lung Cheung
- Department of Pharmacology and Pharmacy
- Department of Medicine
- State Key Laboratory of Pharmaceutical Biotechnology
- Centre for Genomic Sciences, University of Hong Kong, Pokfulam, Hong Kong
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Common Variants in OPG Confer Risk to Bone Mineral Density Variation and Osteoporosis Fractures. Sci Rep 2017; 7:1739. [PMID: 28496203 PMCID: PMC5432005 DOI: 10.1038/s41598-017-01579-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2016] [Accepted: 03/29/2017] [Indexed: 11/20/2022] Open
Abstract
Although many common variants have been identified for bone mineral density (BMD) and osteoporosis fractures, all the identified risk variants could only explain a small portion of heritability of BMD and osteoporosis fractures. OPG belongs to the tumor necrosis factor receptor superfamily, which plays a crucial role in bone remodeling and is thus a promising candidate gene of osteoporosis. Several studies have explored the association of OPG variants with BMD or osteoporosis fractures, however, the results remain inconsistent among different populations. In the study, we first assessed the relationship between OPG variants and BMD or osteoporosis fractures in our sample size (227 subjects with postmenopausal osteoporosis and 189 controls), and then performed a systematic meta-analysis. Among the nine SNPs genotyped, rs6469804 and rs2073618 showed significant associations with both BMD and osteoporotic fractures, while rs3102735 was only associated with BMD in our samples (P < 0.05). For meta-analyses, data for a total of 12 SNPs were pooled (4725 patients and 37804 controls), and five SNPs, including rs6993813, rs6469804, rs3134070, rs2073618 and rs3102734, showed association with osteoporosis fractures (P < 0.05). On light of the above analysis, we believe that OPG is one promising susceptibility gene of BMD or osteoporotic fractures.
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Lai P, Song Q, Yang C, Li Z, Liu S, Liu B, Li M, Deng H, Cai D, Jin D, Liu A, Bai X. Loss of Rictor with aging in osteoblasts promotes age-related bone loss. Cell Death Dis 2016; 7:e2408. [PMID: 27735936 PMCID: PMC5133960 DOI: 10.1038/cddis.2016.249] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Revised: 07/03/2016] [Accepted: 07/05/2016] [Indexed: 01/16/2023]
Abstract
Osteoblast dysfunction is a major cause of age-related bone loss, but the mechanisms underlying changes in osteoblast function with aging are poorly understood. This study demonstrates that osteoblasts in aged mice exhibit markedly impaired adhesion to the bone formation surface and reduced mineralization in vivo and in vitro. Rictor, a specific component of the mechanistic target of rapamycin complex 2 (mTORC2) that controls cytoskeletal organization and cell survival, is downregulated with aging in osteoblasts. Mechanistically, we found that an increased level of reactive oxygen species with aging stimulates the expression of miR-218, which directly targets Rictor and reduces osteoblast bone surface adhesion and survival, resulting in a decreased number of functional osteoblasts and accelerated bone loss in aged mice. Our findings reveal a novel functional pathway important for age-related bone loss and support for miR-218 and Rictor as potential targets for therapeutic intervention for age-related osteoporosis treatment.
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Affiliation(s)
- Pinling Lai
- Academy of Orthopedics in Guangdong Province, The Third Affiliated Hospital of Southern Medical University, Guangzhou 510630, China.,State Key Laboratory of Organ Failure Research, Department of Cell Biology, School of Basic Medical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Qiancheng Song
- State Key Laboratory of Organ Failure Research, Department of Cell Biology, School of Basic Medical Sciences, Southern Medical University, Guangzhou 510515, China.,Department of Biochemistry, Institute of Genetic Engineering, Southern Medical University, Guangzhou 510515, China
| | - Cheng Yang
- Academy of Orthopedics in Guangdong Province, The Third Affiliated Hospital of Southern Medical University, Guangzhou 510630, China
| | - Zhen Li
- Academy of Orthopedics in Guangdong Province, The Third Affiliated Hospital of Southern Medical University, Guangzhou 510630, China
| | - Sichi Liu
- State Key Laboratory of Organ Failure Research, Department of Cell Biology, School of Basic Medical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Bin Liu
- Department of Spine Surgery, The Third Affiliated Hospital, Sun Yat-Sen University, Guangzhou 510630, China
| | - Mangmang Li
- State Key Laboratory of Organ Failure Research, Department of Cell Biology, School of Basic Medical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Hongwen Deng
- Academy of Orthopedics in Guangdong Province, The Third Affiliated Hospital of Southern Medical University, Guangzhou 510630, China
| | - Daozhang Cai
- Academy of Orthopedics in Guangdong Province, The Third Affiliated Hospital of Southern Medical University, Guangzhou 510630, China
| | - Dadi Jin
- Academy of Orthopedics in Guangdong Province, The Third Affiliated Hospital of Southern Medical University, Guangzhou 510630, China
| | - Anling Liu
- Department of Biochemistry, Institute of Genetic Engineering, Southern Medical University, Guangzhou 510515, China
| | - Xiaochun Bai
- Academy of Orthopedics in Guangdong Province, The Third Affiliated Hospital of Southern Medical University, Guangzhou 510630, China.,State Key Laboratory of Organ Failure Research, Department of Cell Biology, School of Basic Medical Sciences, Southern Medical University, Guangzhou 510515, China
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16
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Dastgheib SA, Gartland A, Tabei SMB, Omrani GR, Teare MD. A Candidate Gene Association Study of Bone Mineral Density in an Iranian Population. Front Endocrinol (Lausanne) 2016; 7:141. [PMID: 27833587 PMCID: PMC5081477 DOI: 10.3389/fendo.2016.00141] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/11/2016] [Accepted: 10/13/2016] [Indexed: 11/13/2022] Open
Abstract
The genetic epidemiology of variation in bone mineral density (BMD) and osteoporosis is not well studied in Iranian populations and needs more research. We report a candidate gene association study of BMD variation in a healthy cross-sectional study of 501 males and females sampled from the Iranian Multi-Centre Osteoporosis Study, Shiraz, Iran. We selected to study the association with 21 single nucleotide polymorphisms (SNPs) located in the 7 candidate genes LRP5, RANK, RANKL, OPG, P2RX7, VDR, and ESR1. BMD was measured at the three sites L2-L4, neck of femur, and total hip. Association between BMD and each SNP was assessed using multiple linear regression assuming an allele dose (additive effect) on BMD (adjusted for age and sex). Statistically significant (at the unadjusted 5% level) associations were seen with seven SNPs in five of the candidate genes. Two SNPs showed statistically significant association with more than one BMD site. Significant association was seen between BMD at all the three sites with the VDR SNP rs731246 (L2-L4 p = 0.038; neck of femur p = 0.001; and total hip p < 0.001). The T allele was consistently associated with lower BMD than the C allele. Significant association was also seen for the P2RX7 SNP rs3751143, where the G allele was consistently associated with lower BMD than the T allele (L2-L4 p = 0.069; neck of femur p = 0.024; and total hip p = 0.045).
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Affiliation(s)
- Seyed Alireza Dastgheib
- Department of Medical Genetics, Shiraz University of Medical Sciences, Shiraz, Iran
- *Correspondence: Seyed Alireza Dastgheib, ; Marion Dawn Teare,
| | - Alison Gartland
- Academic Unit of Bone Biology, Department of Oncology and Metabolism, The Mellanby Centre for Bone Research, The University of Sheffield, Sheffield, UK
| | - Seyed Mohammad Bagher Tabei
- Department of Medical Genetics, Shiraz University of Medical Sciences, Shiraz, Iran
- Transgenic Technology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | | | - Marion Dawn Teare
- Design Trials and Statistics, School of Health and Related Research (ScHARR), The University of Sheffield, Sheffield, UK
- *Correspondence: Seyed Alireza Dastgheib, ; Marion Dawn Teare,
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Zhang C, Ma J, Chen G, Fu D, Li L, Li M. Evaluation of common variants in CNR2 gene for bone mineral density and osteoporosis susceptibility in postmenopausal women of Han Chinese. Osteoporos Int 2015; 26:2803-10. [PMID: 26055357 DOI: 10.1007/s00198-015-3195-x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/02/2015] [Accepted: 05/28/2015] [Indexed: 12/11/2022]
Abstract
UNLABELLED Postmenopausal osteoporosis is a major health problem with important genetic factors in postmenopausal women. We thoroughly evaluated the relationship of CNR2 polymorphisms with osteoporosis in a cohort of 1032 osteoporosis patients and 2089 healthy controls from Han Chinese postmenopausal women. Statistically significant differences, depending on different genotypes, were presented. INTRODUCTION Osteoporosis is a major health problem in postmenopausal women, which is a multifactorial disease in which genetic determinants are modulated by hormonal, environmental, and nutritional factors. An important clinical risk factor in the pathogenesis of osteoporosis is the presence of genetic polymorphism in susceptibility genes. The aim of our study was to investigate whether CNR2 gene, which attributes to osteoporosis susceptibility in some populations, is associated with bone mineral density (BMD) or osteoporosis in Han Chinese postmenopausal women. METHODS We examine 39 SNPs covering the region of CNR2 gene in 3121 Han Chinese postmenopausal women, consisting of 1032 osteoporosis patients and 2089 healthy controls, to evaluate the association with BMD and osteoporosis. RESULTS We found that rs4237 and rs2501431 were significantly associated with BMD and osteoporosis (corrected p = 0.020085 and 0.017199) in our sample, and the TT genotype of rs2501431 and the AA genotype of rs4237 had lower lumbar spine BMD and femoral neck BMD compared with the other genotypes. Additionally, analyses by haplotypes indicated that two haplotype blocks, containing rs4237 and rs2501431 respectively, in the CNR2 gene significantly associated with BMD and osteoporosis (both global permutation p < 0.001), and a risk haplotype (ATTT) in the block of rs3003336-rs2501431-rs2502992-rs2501432 had almost 4-fold increase in the cases. CONCLUSIONS Our results provide further supportive evidence for an important role of CNR2 gene in the etiology of osteoporosis and suggest that it may be a genetic risk factor for BMD and osteoporosis in Han Chinese postmenopausal women.
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Affiliation(s)
- C Zhang
- The First Department of Orthopedics, the Second Affiliated Hospital, School of Medicine, Xi'an Jiaotong University, 157 Xiwu road, Xi'an, 710061, China
| | - J Ma
- The First Department of Orthopedics, the Second Affiliated Hospital, School of Medicine, Xi'an Jiaotong University, 157 Xiwu road, Xi'an, 710061, China
| | - G Chen
- College of Medicine & Forensics, Xi'an Jiaotong University, 76 West Yanta road, Xi'an, 710061, China
| | - D Fu
- College of Medicine & Forensics, Xi'an Jiaotong University, 76 West Yanta road, Xi'an, 710061, China
| | - L Li
- College of Medicine & Forensics, Xi'an Jiaotong University, 76 West Yanta road, Xi'an, 710061, China
| | - M Li
- Department of Ultrasound, the Second Affiliated Hospital, School of Medicine, Xi'an Jiaotong University, 157 Xiwu road, Xi'an, 710061, China.
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18
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The influence of vitamin D receptor genetic variants on bone mineral density and osteoporosis in Chinese postmenopausal women. DISEASE MARKERS 2015; 2015:760313. [PMID: 25784778 PMCID: PMC4346683 DOI: 10.1155/2015/760313] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 11/13/2014] [Accepted: 01/20/2015] [Indexed: 02/08/2023]
Abstract
Growing evidence indicates that the vitamin D receptor (VDR) gene is an important candidate gene for influencing the development of osteoporosis. The aim of the study was to evaluate the potential association between genetic variants of VDR gene and bone mineral density (BMD) and osteoporosis in Chinese postmenopausal women. The study included 970 Chinese postmenopausal women at the postmenopausal osteoporosis (482) and healthy controls (488). The BMD of lumbar spine (L2–4 anterior-posterior view), femoral neck hip, and total hip was evaluated using the Norland XR-46 dual energy X-ray absorptiometry (DEXA). The genotypes of VDR genetic variants were determined by the created restriction site-PCR (CRS-PCR) and confirmed by DNA sequencing methods. Our data indicated that the VDR p.Glicine (Gly)14 alanine (Ala) and p.histidine (His) 305 glutanine (Gln) genetic variants were statistically associated with adjusted femoral neck hip BMD, adjusted lumbar spine BMD, and adjusted total hip BMD (P values < 0.05). Results from this study suggest that the VDR p.Gly14Ala and p.His305Gln genetic variants are significantly associated with BMD decrease in Chinese postmenopausal women and might be used as molecular markers for assessing the risk of BMD and osteoporosis.
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Association analysis between g.18873C>T and g.27522G>A genetic polymorphisms of OPG and bone mineral density in Chinese postmenopausal women. BIOMED RESEARCH INTERNATIONAL 2014; 2014:320828. [PMID: 25580430 PMCID: PMC4279182 DOI: 10.1155/2014/320828] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 05/27/2014] [Accepted: 08/04/2014] [Indexed: 01/09/2023]
Abstract
Several studies report that the OPG is an important candidate gene in the pathogenesis of osteoporosis. This study aimed to detect the potential association of OPG gene polymorphisms with osteoporosis in postmenopausal women. We recruited 928 subjects containing 463 with primary postmenopausal osteoporosis and 465 healthy volunteers as controls. The BMD of neck hip, lumbar spine (L2–4), and total hip were assessed by dual-energy X-ray absorptiometry (DEXA). Through the created restriction site-polymerase chain reaction (CRS-PCR), PCR-restriction fragment length polymorphism (PCR-RFLP), and DNA sequencing methods, the g.18873C>T and g.27522G>A have been investigated. As for g.18873C>T, our data indicated that subjects with CC genotype have significantly higher BMD value than those of CT and TT genotypes (all P values < 0.05). As for g.27522G>A, the BMD values of subjects with GG genotype were significantly higher than those of GA and AA genotypes (all P values < 0.05). Our findings suggest that the OPG g.18873C>T and g.27522G>A genetic polymorphisms are associated with the decreased risk for osteoporosis in Chinese postmenopausal women.
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20
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TNFRSF11B gene polymorphisms, bone mineral density, and fractures in Slovak postmenopausal women. J Appl Genet 2014; 56:57-63. [DOI: 10.1007/s13353-014-0247-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2014] [Revised: 09/03/2014] [Accepted: 09/11/2014] [Indexed: 10/24/2022]
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Sun T, Chen M, Lin X, Yu R, Zhao Y, Wang J. The influence of osteoprotegerin genetic polymorphisms on bone mineral density and osteoporosis in Chinese postmenopausal women. Int Immunopharmacol 2014; 22:200-3. [DOI: 10.1016/j.intimp.2014.06.023] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2014] [Revised: 06/10/2014] [Accepted: 06/11/2014] [Indexed: 12/30/2022]
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Association of calcitonin receptor gene polymorphism with bone mineral density in postmenopausal Chinese women: a meta-analysis. Arch Gynecol Obstet 2014; 291:165-72. [PMID: 25055932 DOI: 10.1007/s00404-014-3378-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2014] [Accepted: 07/09/2014] [Indexed: 12/11/2022]
Abstract
BACKGROUND The relationship between Calcitonin receptor (CTR) gene polymorphism C1377T and bone mineral density (BMD) in postmenopausal women has been studied to some degree in Western countries, but the reports remain inconclusive and have not been generalized to other populations. PURPOSE To evaluate the association of CTR gene polymorphism C1377T with BMD in the Han Chinese population. METHODS We searched for all published articles indexed in MEDLINE (1950-2014), EMBASE (1974-2014), China National Knowledge Infrastructure (CNKI, 1994-2014), and the Wanfang Database, using the key words "polymorphism," "CTR," "osteoporosis," and "bone density." The data were extracted independently by two reviewers. The heterogeneity between studies was determined using the Chi-square-based Q test. Potential publication bias was estimated using a funnel plot and Egger's linear regression test. Odds ratios and 95 % confidence intervals (CI) were used to evaluate the results. RESULTS Six eligible studies were selected for the meta-analysis. Our analysis suggested that the C1377T polymorphism of the CTR gene was associated with BMD at the lumbar spine (95 % CI -0.57 to -0.05; P = 0.02), but not associated with BMD at the femoral neck (95 % CI -0.27 to 0.24; P = 0.90) in the postmenopausal Han Chinese population. CONCLUSION The C1377T polymorphism in the CTR gene is associated with BMD at the lumbar spine in a postmenopausal Han Chinese population and the CTR gene may become a useful genetic marker for predicting the risk of developing osteoporosis in postmenopausal Chinese women.
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The relationship between the g.27450A>T genetic variant of OPG gene and osteoporosis in Chinese postmenopausal women. Int Immunopharmacol 2014; 21:464-7. [PMID: 24867796 DOI: 10.1016/j.intimp.2014.05.017] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2014] [Revised: 05/13/2014] [Accepted: 05/14/2014] [Indexed: 11/21/2022]
Abstract
The objective of this study is to evaluate the relationship between the g.27450A>T genetic variant of osteoprotegerin (OPG) gene and osteoporosis in Chinese postmenopausal women. A total of 886 subjects were enrolled in this study. The femoral neck hip, lumbar spine (L2-4), and total hip bone mineral density (BMD) were detected by dual-energy X-ray absorptiometry (DEXA). The genotyping of the g.27450A>T genetic variant of OPG gene was investigated by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) and DNA sequencing methods. Significant differences in the femoral neck hip, lumbar spine (L2-4), and total hip BMD among different genotypes were found, and the subjects with AA genotype were significantly higher than those of AT and TT genotypes (P<0.05). The allele-A could be a decreased risk factor for osteoporosis. Results from this study support that the g.27450A>T genetic variant of OPG gene has potential relationship with BMD and osteoporosis in Chinese postmenopausal women.
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4q22.1 contributes to bone mineral density and osteoporosis susceptibility in postmenopausal women of Chinese Han population. PLoS One 2013; 8:e80165. [PMID: 24278256 PMCID: PMC3836996 DOI: 10.1371/journal.pone.0080165] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2013] [Accepted: 09/30/2013] [Indexed: 12/12/2022] Open
Abstract
Osteoporosis is a multifactorial disease in which genetic determinants are modulated by hormonal, environmental and nutritional factors. An important clinical risk factor in the pathogenesis of osteoporosis is the presence of genetics polymorphism in/around susceptibility genes/regions. This study explored whether the region of 4q22.1, which confers risk of developing osteoporosis in some populations, associated with bone mineral density and osteoporosis susceptibility in postmenopausal women of Han Chinese. We investigated 32 SNPs with minor allele frequencies ≥0.05 between 20 kb upstream and 20 kb downstream (40 kb window) of rs6532023, mapping in the 4q22.1 region, which was reported to be significantly associated with osteoporosis in previous studies. We found that rs6532023 was significantly associated with bone mineral density and osteoporosis (corrected p = 0.015) in our sample, including 440 cases and 640 controls, and allele G was supposed as a risk factor while T worked as a protective factor. Further genotype association analyses suggested a similar pattern (corrected p = 0.040). Additionally, analyses by haplotypes indicated that a haplotype block rs7683315-rs6532023-rs1471400-rs1471403 in the region associated with bone mineral density and osteoporosis (global p = 0.032), and risk haplotype A-G-G-C had almost 1.5-fold increased in the cases. To our knowledge, this is the first report to examine 4q22.1 region polymorphisms and osteoporosis in Han Chinese. Our results provide further evidence for an effect of the region of 4q22.1 on the etiology of osteoporosis and suggest that 4q22.1 may be a genetic risk factor for bone mineral density and osteoporosis.
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Zhu J, Luo Z, Cao Y, Yu M, Peng J, Huang D. The Influence of g.19124G>A Genetic Polymorphism in the OPG Gene on Bone Mineral Density in Chinese Women. Genet Test Mol Biomarkers 2013; 17:696-9. [PMID: 23837846 DOI: 10.1089/gtmb.2013.0183] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Affiliation(s)
- Jie Zhu
- Department of Emergency, The Second Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong Province, People's Republic of China
| | - Zitong Luo
- Department of Emergency, The Second Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong Province, People's Republic of China
| | - Yi Cao
- Department of Emergency, The Second Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong Province, People's Republic of China
| | - Menglei Yu
- Department of Emergency, The Second Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong Province, People's Republic of China
| | - Jicai Peng
- Department of Emergency, The Second Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong Province, People's Republic of China
| | - Duping Huang
- Department of Emergency, The Second Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong Province, People's Republic of China
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Cheung CL, Lau KS, Sham PC, Tan KCB, Kung AWC. Genetic variant in vitamin D binding protein is associated with serum 25-hydroxyvitamin D and vitamin D insufficiency in southern Chinese. J Hum Genet 2013; 58:749-51. [DOI: 10.1038/jhg.2013.84] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2013] [Revised: 06/10/2013] [Accepted: 06/12/2013] [Indexed: 12/30/2022]
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27
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Gene clustering analysis in human osteoporosis disease and modifications of the jawbone. Arch Oral Biol 2013; 58:912-29. [DOI: 10.1016/j.archoralbio.2013.02.013] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2012] [Revised: 01/11/2013] [Accepted: 02/28/2013] [Indexed: 12/18/2022]
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28
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Wang Q, Chen Z, Huang Y, Li Q, Zhu L, Cai X, He G, Xie Y, Liu Q. The relationship between osteoprotegerin gene polymorphisms and bone mineral density in Chinese postmenopausal women. Int Immunopharmacol 2013; 17:404-7. [PMID: 23856613 DOI: 10.1016/j.intimp.2013.06.031] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2013] [Revised: 06/26/2013] [Accepted: 06/26/2013] [Indexed: 01/04/2023]
Abstract
Previous evidence supports that the osteoprotegerin (OPG) gene is one of the most important candidate genes for influencing the pathogenesis of osteoporosis. The objective of this study was to investigate the relationship between OPG gene polymorphisms and osteoporosis in Chinese postmenopausal women. A total of 764 subjects were included in this study. The bone mineral density (BMD) in the lumbar spine (L2-4), neck hip and total hip was determined by dual-energy X-ray absorptiometry (DEXA). The g.19190C>A and g.25602A>G SNPs were detected by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP), created restriction site PCR (CRS-PCR) and DNA sequencing methods. As for g.19190C>A, our data suggested that the BMD value of lumbar spine (L2-4), neck hip and total hip for subjects with CC genotype was significantly higher than that of CA and AA genotypes (P<0.05). No significant difference was detected between the association of g.25602A>G genotypes with spine BMD and neck hip BMD, while total hip BMD almost reached the significant level (P=0.063). These findings provide more evidence that the SNPs in OPG gene could affect BMD and osteoporosis, and the allele-A of g.19190C>A and allele-G of g.25602A>G genetic variants are associated with increased risk for osteoporosis in Chinese postmenopausal women.
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Affiliation(s)
- Qingfu Wang
- Department of Orthopedics, The People's Hospital of Maoming City, Maoming, Guangdong province, People's Republic of China.
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Wu S, Liu Y, Zhang L, Han Y, Lin Y, Deng HW. Genome-wide approaches for identifying genetic risk factors for osteoporosis. Genome Med 2013; 5:44. [PMID: 23731620 PMCID: PMC3706967 DOI: 10.1186/gm448] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Osteoporosis, the most common type of bone disease worldwide, is clinically characterized by low bone mineral density (BMD) and increased susceptibility to fracture. Multiple genetic and environmental factors and gene-environment interactions have been implicated in its pathogenesis. Osteoporosis has strong genetic determination, with the heritability of BMD estimated to be as high as 60%. More than 80 genes or genetic variants have been implicated in risk of osteoporosis by hypothesis-free genome-wide studies. However, these genes or genetic variants can only explain a small portion of BMD variation, suggesting that many other genes or genetic variants underlying osteoporosis risk await discovery. Here, we review recent progress in genome-wide studies of osteoporosis and discuss their implications for medicine and the major challenges in the field.
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Affiliation(s)
- Shuyan Wu
- The Center for System Biomedical Research, School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, No. 516 Jungong Rd, Yangpu district, Shanghai, 200093, China
| | - Yongjun Liu
- Center for Bioinformatics and Genomics, Department of Biostatistics and Bioinformatics, School of Public Health and Tropical Medicine, Tulane University, 1440 Canal St, New Orleans, LA 70112, USA
| | - Lei Zhang
- The Center for System Biomedical Research, School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, No. 516 Jungong Rd, Yangpu district, Shanghai, 200093, China ; Center for Bioinformatics and Genomics, Department of Biostatistics and Bioinformatics, School of Public Health and Tropical Medicine, Tulane University, 1440 Canal St, New Orleans, LA 70112, USA
| | - Yingying Han
- The Center for System Biomedical Research, School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, No. 516 Jungong Rd, Yangpu district, Shanghai, 200093, China
| | - Yong Lin
- The Center for System Biomedical Research, School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, No. 516 Jungong Rd, Yangpu district, Shanghai, 200093, China
| | - Hong-Wen Deng
- The Center for System Biomedical Research, School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, No. 516 Jungong Rd, Yangpu district, Shanghai, 200093, China ; Center for Bioinformatics and Genomics, Department of Biostatistics and Bioinformatics, School of Public Health and Tropical Medicine, Tulane University, 1440 Canal St, New Orleans, LA 70112, USA
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Chen Q, Liu K, Robinson AR, Clauson CL, Blair HC, Robbins PD, Niedernhofer LJ, Ouyang H. DNA damage drives accelerated bone aging via an NF-κB-dependent mechanism. J Bone Miner Res 2013; 28:1214-28. [PMID: 23281008 PMCID: PMC3662975 DOI: 10.1002/jbmr.1851] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/17/2012] [Revised: 11/15/2012] [Accepted: 11/26/2012] [Indexed: 12/21/2022]
Abstract
Advanced age is one of the most important risk factors for osteoporosis. Accumulation of oxidative DNA damage has been proposed to contribute to age-related deregulation of osteoblastic and osteoclastic cells. Excision repair cross complementary group 1-xeroderma pigmentosum group F (ERCC1-XPF) is an evolutionarily conserved structure-specific endonuclease that is required for multiple DNA repair pathways. Inherited mutations affecting expression of ERCC1-XPF cause a severe progeroid syndrome in humans, including early onset of osteopenia and osteoporosis, or anomalies in skeletal development. Herein, we used progeroid ERCC1-XPF-deficient mice, including Ercc1-null (Ercc1(-/-)) and hypomorphic (Ercc1(-/Δ)) mice, to investigate the mechanism by which DNA damage leads to accelerated bone aging. Compared to their wild-type littermates, both Ercc1(-/-) and Ercc1(-/Δ) mice display severe, progressive osteoporosis caused by reduced bone formation and enhanced osteoclastogenesis. ERCC1 deficiency leads to atrophy of osteoblastic progenitors in the bone marrow stromal cell (BMSC) population. There is increased cellular senescence of BMSCs and osteoblastic cells, as characterized by reduced proliferation, accumulation of DNA damage, and a senescence-associated secretory phenotype (SASP). This leads to enhanced secretion of inflammatory cytokines known to drive osteoclastogenesis, such as interleukin-6 (IL-6), tumor necrosis factor α (TNFα), and receptor activator of NF-κB ligand (RANKL), and thereby induces an inflammatory bone microenvironment favoring osteoclastogenesis. Furthermore, we found that the transcription factor NF-κB is activated in osteoblastic and osteoclastic cells of the Ercc1 mutant mice. Importantly, we demonstrated that haploinsufficiency of the p65 NF-κB subunit partially rescued the osteoporosis phenotype of Ercc1(-/Δ) mice. Finally, pharmacological inhibition of the NF-κB signaling via an I-κB kinase (IKK) inhibitor reversed cellular senescence and SASP in Ercc1(-/Δ) BMSCs. These results demonstrate that DNA damage drives osteoporosis through an NF-κB-dependent mechanism. Therefore, the NF-κB pathway represents a novel therapeutic target to treat aging-related bone disease.
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Affiliation(s)
- Qian Chen
- Department of Medicine, University of Pittsburgh School of Medicine, 1218 Scaife Hall 3550 Terrace Street, Pittsburgh, PA 15261
| | - Kai Liu
- Department of Restorative Dentistry and Comprehensive Care, University of Pittsburgh School of Dental Medicine, 3023 Salk Annex, 3501 Terrace Street, Pittsburgh, PA 15261 USA
| | - Andria R. Robinson
- Department of Human Genetics, University of Pittsburgh School of Public Health, 130 DeSoto Street, Pittsburgh, PA 15261 USA
- University of Pittsburgh Cancer Institute, 5117 Centre Ave, Hillman Cancer Center, 2.6, Pittsburgh, PA 15213 USA
| | - Cheryl L. Clauson
- University of Pittsburgh Cancer Institute, 5117 Centre Ave, Hillman Cancer Center, 2.6, Pittsburgh, PA 15213 USA
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, 427 Bridgeside Point II, 450 Technology Drive, Pittsburgh, PA 15219 USA
| | - Harry C. Blair
- Pittsburgh Veteran’s Affairs Medical Center, Laboratory Service-646, 7180 Highland Drive, Pittsburgh, PA 15206 USA
- Department of Pathology, University of Pittsburgh School of Medicine, Scaife Hall S705, 3501 Terrace Street, Pittsburgh, PA 15261 USA
| | - Paul D. Robbins
- University of Pittsburgh Cancer Institute, 5117 Centre Ave, Hillman Cancer Center, 2.6, Pittsburgh, PA 15213 USA
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, 427 Bridgeside Point II, 450 Technology Drive, Pittsburgh, PA 15219 USA
| | - Laura J. Niedernhofer
- University of Pittsburgh Cancer Institute, 5117 Centre Ave, Hillman Cancer Center, 2.6, Pittsburgh, PA 15213 USA
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, 427 Bridgeside Point II, 450 Technology Drive, Pittsburgh, PA 15219 USA
| | - Hongjiao Ouyang
- Department of Restorative Dentistry and Comprehensive Care, University of Pittsburgh School of Dental Medicine, 3023 Salk Annex, 3501 Terrace Street, Pittsburgh, PA 15261 USA
- Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, 427 Bridgeside Point II, 450 Technology Drive, Pittsburgh, PA 15219 USA
- McGowan Institute for Regenerative Medicine, 450 Technology Drive Suite 300 Pittsburgh, PA 15219 USA
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31
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Shen L, Qiu Y, Xing S, Chen D, Zhu Y, He X, Wang J, Lai J, Shi G, Liao T, Tan J. Association between osteoprotegerin genetic variants and bone mineral density in Chinese women. Int Immunopharmacol 2013; 16:275-8. [PMID: 23619553 DOI: 10.1016/j.intimp.2013.04.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2013] [Revised: 04/08/2013] [Accepted: 04/08/2013] [Indexed: 11/29/2022]
Abstract
Osteoprotegerin gene (OPG) is one of the most important candidate genes for osteoporosis. The aim of this study was to assess the association between the single nucleotide polymorphisms (SNPs) of OPG gene and bone mineral density (BMD). A total of 706 Chinese postmenopausal women were enrolled in this study. OPG gene variants were genotyped through created restriction site-polymerase chain reaction (CRS-PCR) and verified using DNA sequencing methods. The lumbar spine (L2-4), total hip and femoral neck were evaluated for BMD. Two genetic variants (g.18910G>A and g.27406C>T) were detected in this study. Our data indicated that the significant differences of spine BMD, neck hip BMD and total hip BMD were detected among different g.27406C>T genotype, subjects with the genotype CC were significantly higher than those of genotype CT and TT. However, the g.18910G>A polymorphism was not significantly associated with spine BMD, neck hip BMD and total hip BMD in the studied subjects. Results from this study indicated that OPG gene variants were associated with BMD in Chinese postmenopausal women. These findings will be useful to analyze the role of OPG gene in osteoporosis in the further studies.
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Affiliation(s)
- Lianbing Shen
- Center of Trauma Repair and Reconstruction of Chinese PLA and Department of Orthopedics, the 98th Military Hospital, Huzhou 313000, Zhejiang Province, People's Republic of China
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Zhang F, He C, Chen G, Li F, Gao H. Association analyses of osteoprotegerin gene polymorphisms with bone mineral density in Chinese postmenopausal women. Med Oncol 2013; 30:389. [DOI: 10.1007/s12032-012-0389-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2012] [Accepted: 09/26/2012] [Indexed: 01/12/2023]
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Yu F, Huang X, Miao J, Guo L, Tao D. Association between osteoprotegerin genetic variants and osteoporosis in Chinese postmenopausal women. Endocr J 2013; 60:1303-7. [PMID: 24067544 DOI: 10.1507/endocrj.ej13-0308] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
The objective of this study was to evaluate the association of single nucleotide polymorphisms (SNPs) of osteoprotegerin gene (OPG) with bone mineral density (BMD) and osteoporosis. A total of 338 Chinese postmenopausal women with primary osteoporosis and 367 healthy controls were enrolled. The lumbar spine (L₂₋₄), total hip and femoral neck hip of BMD were assessed by dual-energy X-ray absorptiometry (DEXA). OPG genetic variants were genotyped through polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP), created restriction site-PCR (CRS-PCR) and DNA sequencing methods. In this study, the g.18861A>G and g.25548C>T SNPs were detected and our data suggested that the significant differences of spine BMD, femoral neck hip BMD and total hip BMD were found among different g.18861A>G genotype, subjects with the AA genotype were significantly higher than those of AG and GG genotypes (p < 0.05). The g.25548C>T variant was not significantly associated with spine BMD, femoral neck hip BMD and total hip BMD (p > 0.05), while almost reached at the significant level in total hip BMD (p = 0.061). These findings suggeste that OPG gene variants are related to BMD and osteoporosis in Chinese postmenopausal women.
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Affiliation(s)
- Fengbin Yu
- Department of Orthopaedic Surgery, No. 98 Hospital of PLA, Huzhou 313000, People's Republic of China
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Bai R, Liu W, Zhao A, Zhao Z, Jiang D. Quantitative assessment of the associations between MTHFR C677T and A1298C polymorphisms and risk of fractures: a meta-analysis. Mol Biol Rep 2012; 40:2419-30. [DOI: 10.1007/s11033-012-2322-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2012] [Accepted: 11/19/2012] [Indexed: 01/18/2023]
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Liu RD, Chen RX, Li WR, Huang YL, Li WH, Cai GR, Zhang H. The Glu727 Allele of Thyroid Stimulating Hormone Receptor Gene is Associated with Osteoporosis. NORTH AMERICAN JOURNAL OF MEDICAL SCIENCES 2012; 4:300-4. [PMID: 22866266 PMCID: PMC3409653 DOI: 10.4103/1947-2714.98588] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Background: Published data indicate that thyroid stimulating hormone receptor (TSHR) activities are associated with osteoporosis in some patients. Aim: This study aimed to elucidate whether a given polymorphism of the TSHR gene is associated with osteoporosis. Materials and Methods: One hundred and fifty subjects with osteoporosis were recruited in this study. The diagnosis of osteoporosis was performed with quantitative ultrasound system. The TSHR gene polymorphism was examined by polymerase chain reaction–restriction fragment length polymorphism. Results: The results showed a nucleotide substitution in the first position of codon 36 of the TSHR gene. The nucleotide substitution was from G to C, leading to a 36D → 36H change (D36H) in the predicted amino acid sequence of the receptor. The change did not show significance between healthy subjects and patients with osteoporosis (P > 0.05). On the other hand, we identified another single nucleotide polymorphism that is a C-to-G substitution at codon 727 (GAC to GAG); its frequency was significantly higher in patients with osteoporosis than that in healthy subjects. Using logistic regression analysis, significant correlation was revealed between the genotype D727E and the serum levels of TSH, or the quantitative ultrasound value of the calcaneal bone. Conclusions: The present study suggests that the genotype D727E of the TSHR, but not the genotype D36H, may be a genetic risk factor for osteoporosis.
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Affiliation(s)
- Ren-De Liu
- Department of Orthopedics, Shaoguan First People's Hospital, Guangdong Medical University, Shaoguan, China
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Benisch P, Schilling T, Klein-Hitpass L, Frey SP, Seefried L, Raaijmakers N, Krug M, Regensburger M, Zeck S, Schinke T, Amling M, Ebert R, Jakob F. The transcriptional profile of mesenchymal stem cell populations in primary osteoporosis is distinct and shows overexpression of osteogenic inhibitors. PLoS One 2012; 7:e45142. [PMID: 23028809 PMCID: PMC3454401 DOI: 10.1371/journal.pone.0045142] [Citation(s) in RCA: 145] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2012] [Accepted: 08/13/2012] [Indexed: 12/11/2022] Open
Abstract
Primary osteoporosis is an age-related disease characterized by an imbalance in bone homeostasis. While the resorptive aspect of the disease has been studied intensely, less is known about the anabolic part of the syndrome or presumptive deficiencies in bone regeneration. Multipotent mesenchymal stem cells (MSC) are the primary source of osteogenic regeneration. In the present study we aimed to unravel whether MSC biology is directly involved in the pathophysiology of the disease and therefore performed microarray analyses of hMSC of elderly patients (79–94 years old) suffering from osteoporosis (hMSC-OP). In comparison to age-matched controls we detected profound changes in the transcriptome in hMSC-OP, e.g. enhanced mRNA expression of known osteoporosis-associated genes (LRP5, RUNX2, COL1A1) and of genes involved in osteoclastogenesis (CSF1, PTH1R), but most notably of genes coding for inhibitors of WNT and BMP signaling, such as Sclerostin and MAB21L2. These candidate genes indicate intrinsic deficiencies in self-renewal and differentiation potential in osteoporotic stem cells. We also compared both hMSC-OP and non-osteoporotic hMSC-old of elderly donors to hMSC of ∼30 years younger donors and found that the transcriptional changes acquired between the sixth and the ninth decade of life differed widely between osteoporotic and non-osteoporotic stem cells. In addition, we compared the osteoporotic transcriptome to long term-cultivated, senescent hMSC and detected some signs for pre-senescence in hMSC-OP. Our results suggest that in primary osteoporosis the transcriptomes of hMSC populations show distinct signatures and little overlap with non-osteoporotic aging, although we detected some hints for senescence-associated changes. While there are remarkable inter-individual variations as expected for polygenetic diseases, we could identify many susceptibility genes for osteoporosis known from genetic studies. We also found new candidates, e.g. MAB21L2, a novel repressor of BMP-induced transcription. Such transcriptional changes may reflect epigenetic changes, which are part of a specific osteoporosis-associated aging process.
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Affiliation(s)
- Peggy Benisch
- Orthopedic Center for Musculoskeletal Research, University of Wuerzburg, Wuerzburg, Germany
| | - Tatjana Schilling
- Orthopedic Center for Musculoskeletal Research, University of Wuerzburg, Wuerzburg, Germany
| | - Ludger Klein-Hitpass
- Institute of Cell Biology (Tumor Research), University Hospital Essen, Essen, Germany
| | - Sönke P. Frey
- Department of Trauma, Hand-, Plastic- and Reconstructive Surgery, University Hospital of Wuerzburg, Wuerzburg, Germany
| | - Lothar Seefried
- Orthopedic Center for Musculoskeletal Research, University of Wuerzburg, Wuerzburg, Germany
| | - Nadja Raaijmakers
- Orthopedic Center for Musculoskeletal Research, University of Wuerzburg, Wuerzburg, Germany
| | - Melanie Krug
- Orthopedic Center for Musculoskeletal Research, University of Wuerzburg, Wuerzburg, Germany
| | - Martina Regensburger
- Orthopedic Center for Musculoskeletal Research, University of Wuerzburg, Wuerzburg, Germany
| | - Sabine Zeck
- Orthopedic Center for Musculoskeletal Research, University of Wuerzburg, Wuerzburg, Germany
| | - Thorsten Schinke
- Department of Osteology and Biomechanics, University Medical Center Hamburg Eppendorf, Hamburg, Germany
| | - Michael Amling
- Department of Osteology and Biomechanics, University Medical Center Hamburg Eppendorf, Hamburg, Germany
| | - Regina Ebert
- Orthopedic Center for Musculoskeletal Research, University of Wuerzburg, Wuerzburg, Germany
| | - Franz Jakob
- Orthopedic Center for Musculoskeletal Research, University of Wuerzburg, Wuerzburg, Germany
- * E-mail:
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Xiao SM, Gao Y, Cheung CL, Bow CH, Lau KS, Sham PC, Tan KCB, Kung AWC. Association of CDX1 binding site of periostin gene with bone mineral density and vertebral fracture risk. Osteoporos Int 2012; 23:1877-87. [PMID: 22215184 PMCID: PMC3368110 DOI: 10.1007/s00198-011-1861-1] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/01/2011] [Accepted: 09/12/2011] [Indexed: 12/03/2022]
Abstract
SUMMARY Periostin (POSTN) as a regulator of osteoblast differentiation and bone formation may affect susceptibility to osteoporosis. This study suggests POSTN as a candidate gene for bone mineral density (BMD) variation and vertebral fracture risk, which could better our understanding about the genetic pathogenesis of osteoporosis and will be useful in clinic in the future. INTRODUCTION The genetic determination of osteoporosis is complex and ill-defined. Periostin (POSTN), an extracellular matrix secreted by osteoblasts and a regulator of osteoblast differentiation and bone formation, may affect susceptibility to osteoporosis. METHODS We adopted a tag-single nucleotide polymorphism (SNP) based association method followed by imputation-based verification and identification of a causal variant. The association was investigated in 1,572 subjects with extreme-BMD and replicated in an independent population of 2,509 subjects. BMD was measured by dual X-ray absorptiometry. Vertebral fractures were identified by assessing vertebral height from X-rays of the thoracolumbar spine. Association analyses were performed with PLINK toolset and imputation analyses with MACH software. The top imputation finding was subsequently validated by genotyping. Interactions between POSTN and another BMD-related candidate gene sclerostin (SOST) were analyzed using MDR program and validated by logistical regression analyses. The putative transcription factor binding with target sequence was confirmed by electrophoretic mobility shift assay (EMSA). RESULTS Several SNPs of POSTN were associated with BMD or vertebral fractures. The most significant polymorphism was rs9547970, located at the -2,327 bp upstream (P = 6.8 × 10(-4)) of POSTN. Carriers of the minor allele G per copy of rs9547970 had 1.33 higher risk of vertebral fracture (P = 0.007). An interactive effect between POSTN and SOST upon BMD variation was suggested (P < 0.01). A specific binding of CDX1 to the sequence of POSTN with the major allele A of rs9547970 but not the variant G allele was confirmed by EMSA. CONCLUSIONS Our results suggest POSTN as a candidate gene for BMD variation and vertebral fracture risk.
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Affiliation(s)
- S-M Xiao
- Department of Medicine, Faculty of Medicine, The University of Hong Kong, Hong Kong, China.
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Cheung CL, Sham PC, Xiao SM, Bow CH, Kung AWC. Meta-analysis of gene-based genome-wide association studies of bone mineral density in Chinese and European subjects. Osteoporos Int 2012; 23:131-42. [PMID: 21927923 PMCID: PMC3249198 DOI: 10.1007/s00198-011-1779-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/07/2011] [Accepted: 07/05/2011] [Indexed: 12/19/2022]
Abstract
UNLABELLED Gene-based association approach could be regarded as a complementary analysis to the single SNP association analysis. We meta-analyzed the findings from the gene-based association approach using the genome-wide association studies (GWAS) data from Chinese and European subjects, confirmed several well established bone mineral density (BMD) genes, and suggested several novel BMD genes. INTRODUCTION The introduction of GWAS has greatly increased the number of genes that are known to be associated with common diseases. Nonetheless, such a single SNP GWAS has a lower power to detect genes with multiple causal variants. We aimed to assess the association of each gene with BMD variation at the spine and hip using gene-based GWAS approach. METHODS We studied 778 Hong Kong Southern Chinese (HKSC) women and 5,858 Northern Europeans (dCG); age, sex, and weight were adjusted in the model. The main outcome measure was BMD at the spine and hip. RESULTS Nine genes showed suggestive p value in HKSC, while 4 and 17 genes showed significant and suggestive p values respectively in dCG. Meta-analysis using weighted Z-transformed test confirmed several known BMD genes and suggested some novel ones at 1q21.3, 9q22, 9q33.2, 20p13, and 20q12. Top BMD genes were significantly associated with connective tissue, skeletal, and muscular system development and function (p < 0.05). Gene network inference revealed that a large number of these genes were significantly connected with each other to form a functional gene network, and several signaling pathways were strongly connected with these gene networks. CONCLUSION Our gene-based GWAS confirmed several BMD genes and suggested several novel BMD genes. Genetic contribution to BMD variation may operate through multiple genes identified in this study in functional gene networks. This finding may be useful in identifying and prioritizing candidate genes/loci for further study.
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Affiliation(s)
- C-L Cheung
- Department of Medicine, The University of Hong Kong, Queen Mary Hospital, 102 Pokfulam Road, Hong Kong, China.
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Li Y, Xi B, Li K, Wang C. Association between vitamin D receptor gene polymorphisms and bone mineral density in Chinese women. Mol Biol Rep 2011; 39:5709-17. [PMID: 22193625 DOI: 10.1007/s11033-011-1380-3] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2011] [Accepted: 12/13/2011] [Indexed: 02/06/2023]
Abstract
Vitamin D receptor (VDR) is implicated in the regulation of bone mineral density (BMD). In this study, we performed a meta-analysis to evaluate the association between the VDR BsmI (rs1544410) and ApaI (rs7975232) polymorphisms and BMD in Chinese women. Literature was retrieved from PubMed and other databases. The studies on the association between VDR BsmI and ApaI genotypes and BMD at the lumbar spine, the femoral neck, the trochanter or the Ward's triangle in Han Chinese women were included in this meta-analysis. Pooled BMD differences and 95% confidence intervals (CIs) were calculated using random- or fixed- effects model. Twenty-five eligible studies, which included 4,075 Chinese women, were identified. No significant difference was observed for either genotype when the meta-analysis was limited to premenopausal women. In postmenopausal women, BMD differences were significant for BB vs. Bb [-0.029 (95% CI -0.056, -0.002) g/m(2), P = 0.037] at the femoral neck, AA vs. Aa [-0.029 (95% CI -0.051, -0.006) g/m(2), P = 0.012] at the lumbar spine, and Aa vs. aa [0.022(95% CI 0.011, 0.033) g/m(2), P = 0.000] at the trochanter. These results suggest a modest but statistically significant association between VDR BsmI and ApaI polymorphisms and BMD in Chinese postmenopausal women, with higher BMD in heterozygous subjects. More epidemiological and mechanistic studies are needed to further investigate the role of VDR gene polymorphisms in regulating BMD and osteoporosis in the future.
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Affiliation(s)
- Yufei Li
- Department of Orthopaedics, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, China.
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40
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Xiao SM, Kung AWC, Gao Y, Lau KS, Ma A, Zhang ZL, Liu JM, Xia W, He JW, Zhao L, Nie M, Fu WZ, Zhang MJ, Sun J, Kwan JSH, Tso GHW, Dai ZJ, Cheung CL, Bow CH, Leung AYH, Tan KCB, Sham PC. Post-genome wide association studies and functional analyses identify association of MPP7 gene variants with site-specific bone mineral density. Hum Mol Genet 2011; 21:1648-57. [PMID: 22171069 DOI: 10.1093/hmg/ddr586] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Our previous genome-wide association study (GWAS) in a Hong Kong Southern Chinese population with extreme bone mineral density (BMD) scores revealed suggestive association with MPP7, which ranked second after JAG1 as a candidate gene for BMD. To follow-up this suggestive signal, we replicated the top single-nucleotide polymorphism rs4317882 of MPP7 in three additional independent Asian-descent samples (n= 2684). The association of rs4317882 reached the genome-wide significance in the meta-analysis of all available subjects (P(meta)= 4.58 × 10(-8), n= 4204). Site heterogeneity was observed, with a larger effect on spine than hip BMD. Further functional studies in a zebrafish model revealed that vertebral bone mass was lower in an mpp7 knock-down model compared with the wide-type (P= 9.64 × 10(-4), n= 21). In addition, MPP7 was found to have constitutive expression in human bone-derived cells during osteogenesis. Immunostaining of murine MC3T3-E1 cells revealed that the Mpp7 protein is localized in the plasma membrane and intracytoplasmic compartment of osteoblasts. In an assessment of the function of identified variants, an electrophoretic mobility shift assay demonstrated the binding of transcriptional factor GATA2 to the risk allele 'A' but not the 'G' allele of rs4317882. An mRNA expression study in human peripheral blood mononuclear cells confirmed that the low BMD-related allele 'A' of rs4317882 was associated with lower MPP7 expression (P= 9.07 × 10(-3), n= 135). Our data suggest a genetic and functional association of MPP7 with BMD variation.
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Affiliation(s)
- Su-Mei Xiao
- Department of Medicine, The University of Hong Kong, Hong Kong, China
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Identification of QTL genes for BMD variation using both linkage and gene-based association approaches. Hum Genet 2011; 130:539-46. [PMID: 21424381 PMCID: PMC3178777 DOI: 10.1007/s00439-011-0972-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2010] [Accepted: 02/28/2011] [Indexed: 01/17/2023]
Abstract
Low bone mineral density (BMD) is a risk factor for osteoporotic fracture with a high heritability. Previous large scale linkage study in Northern Chinese has identified four significant quantitative trait loci (QTL) for BMD variation on chromosome 2q24, 5q21, 7p21 and 13q21. We performed a replication study of these four QTL in 1,459 Southern Chinese from 306 pedigrees. Successful replication was observed on chromosome 5q21 for femoral neck BMD with a LOD score of 1.38 (nominal p value = 0.006). We have previously identified this locus in a genome scan meta-analysis of BMD variation in a white population. Subsequent QTL-wide gene-based association analysis in 800 subjects with extreme BMD identified CAST and ERAP1 as novel BMD candidate genes (empirical p value of 0.032 and 0.014, respectively). The associations were independently replicated in a Northern European population (empirical p value of 0.01 and 0.004 for CAST and ERAP1, respectively). These findings provide further evidence that 5q21 is a BMD QTL, and CAST and ERAP1 may be associated with femoral neck BMD variation.
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