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Fu L, Wang Y, Hu YQ. Inferring causal effects of homocysteine and B-vitamin concentrations on bone mineral density and fractures: Mendelian randomization analyses. Front Endocrinol (Lausanne) 2022; 13:1037546. [PMID: 36518252 PMCID: PMC9742470 DOI: 10.3389/fendo.2022.1037546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/11/2022] [Accepted: 11/07/2022] [Indexed: 11/29/2022] Open
Abstract
Objectives In the progress of bone metabolism, homocysteine (Hcy) and B vitamins play substantial roles. However, the causal associations of homocysteine, B-vitamin concentrations with bone mineral density (BMD), and fractures remain unclear. Therefore, we employed a two-sample Mendelian randomization (MR) design to infer the causal effects of Hcy and B vitamins on BMD and fractures. Methods We selected instrumental variables from large genome-wide association studies (GWASs). Specifically, the exposures mainly included Hcy (sample size: 44,147), vitamin B12 (sample size: 45,576), folate (sample size: 37,465), and vitamin B6 (sample size: 1,864). The outcome variables included total body BMD (sample size: 66,628), heel BMD (sample size: 142,487), femoral neck BMD (sample size: 32,735), lumbar spine BMD (sample size: 28,498), and forearm BMD (sample size: 8143). Additionally, the total body BMD in several age strata was also included. Furthermore, the fractures of the forearm, femoral neck, lumbar spine, heel corresponding with the BMD regions, and femoral neck and lumbar spine BMD in men and women, separately, were added as additional outcomes. Two-sample MR approaches were utilized in this study. Inverse variance weighting (IVW) was adopted as the main analysis. MR-PRESSO, MR-Egger, the weighted median estimate, and multivariable MR were performed as sensitivity methods. Results In the main analysis, Hcy concentrations have an inverse association with heel BMD (Beta = 0.046, 95% confidence interval (CI) -0.073 to -0.019, P = 9.59E-04) per SD unit. In addition, for one SD increase of vitamin B12, the total body BMD decreased 0.083 unit (95%CI -0.126 to -0.040, P = 1.65E-04). The trend was more obvious in age over 45 years (Beta = -0.135, 95%CI -0.203-0.067, P = 9.86E-05 for age 45-60; Beta = -0.074, 95%CI -0.141 to -0.007, P = 0.031 for age over 60 years). No association of B vitamins and Hcy levels with the risk of fractures and femoral neck and lumbar spine BMD in men and women was found in this study. Other sensitivity MR methods elucidated consistent results. Conclusions Our findings indicated that there exist the inversely causal effects of Hcy and vitamin B12 on BMD in certain body sites and age strata. These give novel clues for intervening bone-related diseases in public health and nutrition.
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Affiliation(s)
- Liwan Fu
- Center for Non-Communicable Disease Management, Beijing Children’s Hospital, Capital Medical University, National Center for Children’s Health, Beijing, China
| | - Yuquan Wang
- State Key Laboratory of Genetic Engineering, Human Phenome Institute, Institute of Biostatistics, School of Life Sciences, Fudan University, Shanghai, China
| | - Yue-Qing Hu
- State Key Laboratory of Genetic Engineering, Human Phenome Institute, Institute of Biostatistics, School of Life Sciences, Fudan University, Shanghai, China
- Shanghai Center for Mathematical Sciences, Fudan University, Shanghai, China
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Ilesanmi-Oyelere BL, Kruger MC. B-vitamins and homocysteine as determinants of bone health: a literature review of human studies. J Hum Nutr Diet 2022; 36:1031-1044. [PMID: 36056551 DOI: 10.1111/jhn.13080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2022] [Accepted: 08/15/2022] [Indexed: 11/27/2022]
Abstract
Although there are several factors related to bone diseases such as physical activity, gender (oestrogen), race/ethnicity, smoking and alcohol habits, nutrition is a modifiable risk factor that could be employed to prevent or manage the onset of bone health diseases such as osteoporosis in humans. Aside from calcium and vitamin D, B-vitamins are a group of water-soluble vitamins that play a vital role in cell metabolism. In this review, current evidence on B-vitamins and bone health was assessed. Clinical trials (interventions) indicated that treatment with B-vitamins impact the concentrations of total plasma/serum homocysteine concentrations (tHcy), however, most studies reported a lack of an effect of low homocysteine concentrations on bone turnover markers, bone mineral density (BMD) or fracture risks. Current studies have been inconsistent in their reports on the role of B-vitamins and homocysteine in bone health. More data are therefore required to show the mechanism and effect of tHcy and B-vitamins on BMD, bone metabolism and fracture risk. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Bolaji L Ilesanmi-Oyelere
- School of Health Sciences, College of Health, Massey University, Private Bag 11 222, Palmerston North, 4442, New Zealand
| | - Marlena C Kruger
- School of Health Sciences, College of Health, Massey University, Private Bag 11 222, Palmerston North, 4442, New Zealand
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3
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He T, Jin X, Koh YS, Zhang Q, Zhang C, Liu F. The association of homocysteine, folate, vitamin B12, and vitamin B6 with fracture incidence in older adults: a systematic review and meta-analysis. ANNALS OF TRANSLATIONAL MEDICINE 2021; 9:1143. [PMID: 34430584 PMCID: PMC8350623 DOI: 10.21037/atm-21-2514] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Accepted: 06/21/2021] [Indexed: 12/15/2022]
Abstract
Background Diverse conclusions have been drawn regarding the association of homocysteine (HCY) deficiency and supplements of B vitamins with fracture incidence in older adults. The aim of this meta-analysis was to investigate the association of HCY and B vitamins (folate, vitamin B12, and B6) with fracture incidence in older adults and whether supplements of B vitamins reduce the risk of fracture. Methods The PubMed, Embase, and Cochrane library databases were systematically searched from their inception dates to 1 July 2019 to identify relevant published articles. Meta-analysis was performed to pool hazard ratios (HRs) or risk ratios (RRs) and 95% confidence intervals (CIs) using a random effects model. Results A total of 28 studies fulfilled the inclusion criteria. High serum HCY was an independent risk factor for fractures in older persons (HR =1.25, 95% CI: 1.12 to 1.40), but only at the highest quartile level (>15 µmol/L) (HR =1.71, 95% CI: 1.37 to 2.12), rather than the second and third quartile. Multiple sensitivity and subgroup analyses supported the consistency and stability of this result. A severe deficiency of folate, instead of vitamin B12 and B6, was found to increase the risk of fracture in older adults (HR =1.46, 95% CI: 1.06 to 2.02; 1.24, 95% CI: 0.79 to 1.95; 1.36, 95% CI: 0.90 to 2.06, respectively). For the interventional effect, there was no significant association of combined folate and vitamin B12, combined folate, vitamin B12 and B6, or single vitamin B6 supplementation with the decrease of fracture risk. Discussion This meta-analysis revealed that significantly elevated serum level of HCY is positively associated with fracture incidence in older adults, yet the necessity and threshold for intervention by B vitamins require further large-scale high-quality clinical trials to validate. PROSPERO identifier CRD42019122586.
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Affiliation(s)
- Tao He
- Department of Orthopedics, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
| | - Xiangyun Jin
- Department of Orthopedics, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
| | - Yee Sin Koh
- Department of Internal Medicine, Shanghai Changhang Hospital, Shanghai, China
| | - Qingyu Zhang
- Department of Orthopedics, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China
| | - Chao Zhang
- Department of Orthopedics, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
| | - Fanxiao Liu
- Department of Orthopedics, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China
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4
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Liu CT, Karasik D, Xu H, Zhou Y, Broe K, Cupples LA, Cpgm de Groot L, Ham A, Hannan MT, Hsu YH, Jacques P, McLean RR, Paul L, Selhub J, Trajanoska K, van der Velde N, van Schoor N, Kiel DP. Genetic variants modify the associations of concentrations of methylmalonic acid, vitamin B-12, vitamin B-6, and folate with bone mineral density. Am J Clin Nutr 2021; 114:578-587. [PMID: 33964857 PMCID: PMC8326042 DOI: 10.1093/ajcn/nqab093] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Accepted: 03/05/2021] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Elevated plasma homocysteine has been found to be associated with an increased risk of osteoporosis, especially hip and vertebral fractures. The plasma concentration of homocysteine is dependent on the activities of several B vitamin-dependent enzymes, such as methylenetetrahydrofolate reductase (MTHFR), methionine synthase (MTR), methionine synthase reductase (MTRR), and cystathionine β-synthase (CBS). OBJECTIVES We investigated whether genetic variants in some of the genes involved in 1 carbon metabolism modify the association of B vitamin-related measures with bone mineral density (BMD) and strength. METHODS We measured several B vitamins and biomarkers in participants of the Framingham Offspring Study, and performed analyses of methylmalonic acid (MMA) continuously and <210 nmol/L; pyridoxal-5'-phosphate; vitamin B-12 continuously and ≥258 pmol/L; and folate. The outcomes of interest included areal and volumetric BMD, measured by DXA and quantitative computed tomography (QCT), respectively. We evaluated associations between the bone measures and interactions of single nucleotide polymorphism with a B vitamin or biomarker in Framingham participants (n = 4310 for DXA and n = 3127 for QCT). For analysis of DXA, we validated the association results in the B-PROOF cohort (n = 1072). Bonferroni-corrected locus-wide significant thresholds were defined to account for multiple testing. RESULTS The interactions between rs2274976 and vitamin B-12 and rs34671784 and MMA <210 nmol/L were associated with lumbar spine BMD, and the interaction between rs6586281 and vitamin B-12 ≥258 pmol/L was associated with femoral neck BMD. For QCT-derived traits, 62 interactions between genetic variants and B vitamins and biomarkers were identified. CONCLUSIONS Some genetic variants in the 1-carbon methylation pathway modify the association of B vitamin and biomarker concentrations with bone density and strength. These interactions require further replication and functional validation for a mechanistic understanding of the role of the 1-carbon metabolism pathway on BMD and risks of fracture.
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Affiliation(s)
- Ching-Ti Liu
- Department of Biostatistics, Boston University School of Public Health, Boston, MA, USA
| | - David Karasik
- The Azrieli Faculty of Medicine, Bar-Ilan University, Safed, Israel,Hinda and Arthur Marcus Institute for Aging Research, Hebrew SeniorLife, Boston, MA, USA
| | - Hanfei Xu
- Department of Biostatistics, Boston University School of Public Health, Boston, MA, USA
| | - Yanhua Zhou
- Department of Biostatistics, Boston University School of Public Health, Boston, MA, USA
| | - Kerry Broe
- Hinda and Arthur Marcus Institute for Aging Research, Hebrew SeniorLife, Boston, MA, USA
| | - L Adrienne Cupples
- Department of Biostatistics, Boston University School of Public Health, Boston, MA, USA
| | | | - Annelies Ham
- Erasmus MC Department of Internal Medicine Rotterdam, Rotterdam, The Netherlands
| | - Marian T Hannan
- Hinda and Arthur Marcus Institute for Aging Research, Hebrew SeniorLife, Boston, MA, USA,Department of Medicine, Harvard Medical School, Boston, MA, USA,Department of Medicine, Beth Israel Deaconess Medical Center, Boston, MA, USA
| | - Yi-Hsiang Hsu
- Hinda and Arthur Marcus Institute for Aging Research, Hebrew SeniorLife, Boston, MA, USA,Department of Medicine, Harvard Medical School, Boston, MA, USA
| | - Paul Jacques
- Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University, USA,Friedman School of Nutrition Science and Policy at Tufts University, USA
| | - Robert R McLean
- Hinda and Arthur Marcus Institute for Aging Research, Hebrew SeniorLife, Boston, MA, USA,Corrona, LLC, Waltham, MA, USA
| | - Ligi Paul
- Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University, USA,Friedman School of Nutrition Science and Policy at Tufts University, USA
| | - Jacob Selhub
- Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University, USA,Friedman School of Nutrition Science and Policy at Tufts University, USA
| | - Katerina Trajanoska
- Erasmus MC Department of Internal Medicine Rotterdam, Rotterdam, The Netherlands
| | - Nathalie van der Velde
- Erasmus MC Department of Internal Medicine Rotterdam, Rotterdam, The Netherlands,Amsterdam UMC, University of Amsterdam, Section of Geriatric Medicine, Department of Internal Medicine, Amsterdam Public Health Research Institute, Amsterdam, The Netherlands
| | - Natasja van Schoor
- Amsterdam UMC, University of Amsterdam, Section of Geriatric Medicine, Department of Internal Medicine, Amsterdam Public Health Research Institute, Amsterdam, The Netherlands
| | - Douglas P Kiel
- Address correspondence to C-TL (e-mail: ) or DPK (e-mail: )
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5
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Zhao F, Guo L, Wang X, Zhang Y. Correlation of oxidative stress-related biomarkers with postmenopausal osteoporosis: a systematic review and meta-analysis. Arch Osteoporos 2021; 16:4. [PMID: 33400044 DOI: 10.1007/s11657-020-00854-w] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Accepted: 11/05/2020] [Indexed: 02/03/2023]
Abstract
UNLABELLED Oxidative stress (OS) is implicated in postmenopausal osteoporosis (PO). Results show an imbalance between antioxidative and oxidative markers in PO. Thus, monitoring of OS-related biomarkers and keeping balance between reactive oxygen species and antioxidant system are beneficial to the diagnosis and prognosis of PO. PURPOSE Oxidative stress (OS) has been implicated in postmenopausal osteoporosis (PO). However, the relations between OS-related markers and PO are controversial. This study aimed to quantitatively and comprehensively assess the roles of OS-related biomarkers in PO. METHODS Relevant articles were retrieved from electronic databases. All OS-associated biomarkers with at least 2 independent study outcomes were meta-analyzed. The pooled standardized mean differences (SMD) with its 95% confidence intervals (CI) were presented. RESULTS A total of 36 studies involving 16 OS-related biomarkers were investigated. The overall results showed that total oxidant status (TOS), superoxide dismutase (SOD), hydroperoxides (HY), paraoxonase (PON1), nitric oxide (NO), and homocysteine (Hcy) were not statistically different between the PO and control groups, whereas significantly increased levels of oxidative stress index (OSI), malondialdehyde (MDA), advanced oxidation protein products (AOPP), and vitamin B12, along with decreased total antioxidant status (TAS), total antioxidant power (TAP), catalase (CAT), glutathione peroxidase (GPx), uric acid (UA), and folate, were detected in the PO group. Subgroup analysis based on biological samples displayed significantly elevated NO in erythrocyte and Hcy in serum, along with decreased SOD in serum. CONCLUSION Monitoring of certain OS-related biomarkers might be beneficial to the diagnosis and prognosis of PO.
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Affiliation(s)
- Fulong Zhao
- Department of Trauma Orthopedics, Beijing Luhe Hospital affiliated to Capital Medical University, No.82 Xinhua South road, Tongzhou District, Beijing, 101149, China
| | - Lijuan Guo
- Clinical laboratory, Emergency General Hospital, Beijing, 100028, China
| | - Xuefei Wang
- Department of Trauma Orthopedics, Beijing Luhe Hospital affiliated to Capital Medical University, No.82 Xinhua South road, Tongzhou District, Beijing, 101149, China.
| | - Yakui Zhang
- Department of Trauma Orthopedics, Beijing Luhe Hospital affiliated to Capital Medical University, No.82 Xinhua South road, Tongzhou District, Beijing, 101149, China
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6
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Álvarez-Cienfuegos A, Cantero-Nieto L, García-Gomez JA, Callejas-Rubio JL, González-Gay MA, Ortego-Centeno N. Association Between Homocysteine Serum Level and Bone Mineral Density in Patients With Rheumatoid Arthritis. J Clin Densitom 2020; 23:561-567. [PMID: 31005409 DOI: 10.1016/j.jocd.2019.03.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Revised: 03/24/2019] [Accepted: 03/25/2019] [Indexed: 11/25/2022]
Affiliation(s)
| | | | - J A García-Gomez
- Infectious Diseases Unit, Hospital General de Elche, Alicante, Spain
| | - J L Callejas-Rubio
- Systemic Autoimmune Diseases Unit, Department of Internal Medicine, Hospital Universitario San Cecilio, Granada, Spain
| | - M A González-Gay
- Epidemiology, Genetics and Atherosclerosis Research Group on Systemic Inflammatory Diseases, Rheumatology Division, IDIVAL, Santander, Spain; School of Medicine, University of Cantabria, Santander, Spain; Cardiovascular Pathophysiology and Genomics Research Unit, School of Physiology, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - N Ortego-Centeno
- Systemic Autoimmune Diseases Unit, Department of Internal Medicine, Hospital Universitario San Cecilio, Granada, Spain
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7
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Kalimeri M, Leek F, Wang NX, Koh HR, Roy NC, Cameron-Smith D, Kruger MC, Henry CJ, Totman JJ. Folate and Vitamin B-12 Status Is Associated With Bone Mineral Density and Hip Strength of Postmenopausal Chinese-Singaporean Women. JBMR Plus 2020; 4:e10399. [PMID: 33103028 PMCID: PMC7574704 DOI: 10.1002/jbm4.10399] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Revised: 07/16/2020] [Accepted: 07/27/2020] [Indexed: 12/17/2022] Open
Abstract
The role of micronutrients such as folate and vitamin B‐12 in bone quality has been widely studied with conflicting results. Ethnicity seems to play a large role on nutrient intake, as diet varies across cultures. In this study, we examined the relationships of BMD, proximal femur strength, and bone resorption with plasma folate and vitamin B‐12 in a cohort of 93 healthy postmenopausal women of Chinese‐Singaporean descent. The parameters examined were areal (aBMD) and volumetric BMD (vBMD) of the proximal femur and the third lumbar vertebra (L3), total body aBMD, proximal femur bending, compressive and impact strength indices (composite strength indices) and circulating levels of C‐telopeptide of type I collagen. Eighteen participants (19.4%) had aBMD in the osteoporotic range (osteoporosis group), 59 (63.4%) in the osteopenic range (osteopenia group), and the remaining 16 (17.2%) in the normal range (normal BMD group). Circulating folate levels were significantly higher in the normal BMD group compared with the osteoporosis group. Using linear regression analysis, we found that overall, aBMD and vBMD are positively associated with folate concentrations, whereas composite strength indices were positively associated with vitamin B‐12 concentrations. These findings support the existing literature and suggest a link between levels of circulating folate/vitamin B‐12 and BMD/bone strength in the cohort examined. Further investigation is needed to examine if individuals with inadequate circulating levels of these nutrients could decrease their risk for fragility fractures through better nutrition or vitamin supplementation. © 2020 The Authors. JBMR Plus published by Wiley Periodicals, Inc. on behalf of American Society for Bone and Mineral Research © 2020 The Authors. JBMR Plus published by Wiley Periodicals LLC on behalf of American Society for Bone and Mineral Research.
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Affiliation(s)
- Maria Kalimeri
- Clinical Imaging Research Centre, Yong Loo Lin School of Medicine National University of Singapore Republic of Singapore
| | - Francesca Leek
- Clinical Imaging Research Centre, Yong Loo Lin School of Medicine National University of Singapore Republic of Singapore
| | - Nan Xin Wang
- Clinical Nutrition Research Centre, Singapore Institute for Food and Biotechnology Innovation Agency for Science, Technology and Research (ASTAR) Republic of Singapore
| | - Huann Rong Koh
- Clinical Nutrition Research Centre, Singapore Institute for Food and Biotechnology Innovation Agency for Science, Technology and Research (ASTAR) Republic of Singapore
| | - Nicole C Roy
- Food Nutrition & Health Team AgResearch Grasslands Palmerston North New Zealand.,High-Value Nutrition, National Science Challenge, Liggins Institute The University of Auckland Auckland New Zealand.,Riddet Institute Massey University Palmerston North New Zealand.,Department of Human Nutrition University of Otago Dunedin New Zealand.,Liggins Institute The University of Auckland Auckland New Zealand
| | - David Cameron-Smith
- Riddet Institute Massey University Palmerston North New Zealand.,Liggins Institute The University of Auckland Auckland New Zealand.,Singapore Institute for Clinical Sciences, Agency for Science Technology and Research (ASTAR) Republic of Singapore
| | - Marlena C Kruger
- Riddet Institute Massey University Palmerston North New Zealand.,School of Health Sciences Massey University Palmerston North New Zealand
| | - Christiani Jeyakumar Henry
- Clinical Nutrition Research Centre, Singapore Institute for Food and Biotechnology Innovation Agency for Science, Technology and Research (ASTAR) Republic of Singapore
| | - John J Totman
- Clinical Imaging Research Centre, Yong Loo Lin School of Medicine National University of Singapore Republic of Singapore
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3'-UTR Polymorphisms of Vitamin B-Related Genes Are Associated with Osteoporosis and Osteoporotic Vertebral Compression Fractures (OVCFs) in Postmenopausal Women. Genes (Basel) 2020; 11:genes11060612. [PMID: 32498429 PMCID: PMC7349196 DOI: 10.3390/genes11060612] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Revised: 05/23/2020] [Accepted: 05/27/2020] [Indexed: 12/11/2022] Open
Abstract
As life expectancy increases, the prevalence of osteoporosis is increasing. In addition to vitamin D which is well established to have an association with osteoporosis, B vitamins, such as thiamine, folate (vitamin B9), and cobalamin (vitamin B12), could affect bone metabolism, bone quality, and fracture risk in humans by influencing homocysteine/folate metabolism. Despite the crucial role of B vitamins in bone metabolism, there are few studies regarding associations between B vitamin-related genes and osteoporosis. In this study, we investigated the genetic association of four single nucleotide polymorphisms (SNPs) within the 3’-untranslated regions of vitamin B-related genes, including TCN2 (encodes transcobalamin II), CD320 (encodes transcobalamin II receptor), SLC19A1 (encodes reduced folate carrier protein 1), and SLC19A2 (encodes thiamine carrier 1), with osteoporosis and osteoporotic vertebral compression fracture (OVCF). We recruited 301 postmenopausal women and performed genotyping of CD320 rs9426C>T,TCN2 rs10418C>T, SLC19A1 rs1051296G>T, and SLC19A2 rs16862199C>T using a polymerization chain reaction-restriction fragment length polymorphism assay. There was a significantly higher incidence of both osteoporosis (AOR 5.019; 95% CI, 1.533–16.430, p < 0.05) and OVCF (AOR, 5.760; 95% CI, 1.480–22.417, p < 0.05) in individuals with genotype CD320 CT+TT and high homocysteine concentrations. Allele combination analysis revealed that two combinations, namely CD320 C-TCN2 T-SLC19A1 T-SLC19A2 C (OR, 3.244; 95% CI, 1.478–7.120, p < 0.05) and CD320 T-TCN2 C-SLC19A1 G-SLC19A2 C (OR, 2.287; 95% CI, 1.094–4.782, p < 0.05), were significantly more frequent among the osteoporosis group. Our findings suggest that SNPs within the CD320 gene in 3´-UTR may contribute to osteoporosis and OVCF occurrences in some individuals. Furthermore, specific allele combinations of CD320, TCN2, SLC19A1, and SLC19A2 may contribute to increased susceptibility to osteoporosis and OVCF.
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9
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Mollaei M, Ghoreishi SM, Khoobi A. Multivariate optimization and validation of a new procedure for simultaneous determination of folic acid and folinic acid based on enhancement effect of n-dodecylpyridinium chloride. Microchem J 2020. [DOI: 10.1016/j.microc.2020.104653] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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10
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Berg J, Seyedsadjadi N, Grant R. Increased Consumption of Plant Foods Is Associated with Increased Bone Mineral Density. J Nutr Health Aging 2020; 24:388-397. [PMID: 32242206 DOI: 10.1007/s12603-020-1339-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVES To determine the relationship between plant food consumption and bone mineral density (BMD) in a healthy population when age, gender, BMI and physical activity are accounted for. DESIGN Cross-sectional study. SETTING Participants were recruited from the Sydney Adventist hospital and the University of New South Wales, Sydney, Australia. PARTICIPANTS 33 males and 40 females (total n=73) participated in this study. The mean age was 56.1 ± 8.5 years. All participants were non-diabetic and in general good health. MEASUREMENTS A principle component analysis (PCA) was performed on 12 month self-report food intake data, gathered using the Cancer Council Victoria Dietary Questionnaire for Epidemiological Studies Version 2. Dual-energy X-ray absorptiometry was used to measure total BMD. Fasting plasma total protein, calcium and 25-Hydroxy Vitamin D levels were analysed by the Sydney Adventist Hospital pathology laboratory. Anthropometric measures were obtained using a standardized protocol. Self-reported physical activity levels were assessed using the International Physical Activity Questionnaire. RESULTS The PCA revealed three principle components. These were termed 'Meat Based', 'Junk Food' and 'Plant Based.' After controlling for age, gender, physical activity and BMI, the Plant Based component correlated positively with BMD (p=0.054, R2=0.439) and T-score (p=0.053, R2=0.221). Using a similar model no association between the Meat Based component and BMD or T-score was found. However, when the Plant Based component was included the Meat Based component correlated positively with BMD (p=0.046, R2=0.474) and T-score (p=0.046, R2=0.279). There was no significant association between the Junk Food component and BMD or T-score. People in the third Plant (927 ± 339 vs 751 ± 255 g/day, p=0.025) and Meat Based (921 ± 270 vs 676 ± 241 g/day, p=0.002) tertile had higher calcium intakes than those in the first. People in the second Plant Based tertile had higher plasma Vitamin D levels than those in the first (63.5 ± 16.8 vs. 52.3 ± 22.1 nmol/L, p=0.053) while those in the third Junk Food tertile had lower levels than those in the first (52.4 ± 18.5 vs. 65.4 ± 19.8 nmol/L, p=0.027). No association between Plant Based tertiles and protein intake was observed, however those in the third Meat Based (99.7 ± 25.1 vs. 50.9 ± 13.8 g/day, p=0.000) and Junk Food (87.4 ± 30.7 vs. 56.6 ± 22.2 g/day, p=0.000) tertile had higher protein intake compared to those in the first tertile. CONCLUSION In a healthy middle aged population with normal BMD, an increase in plant food consumption, either alone or in combination with a diet containing meat, is associated with improved bone mineralisation markers. This positive relationship is most likely due to the extensive range of micronutrients and phytochemicals packaged within plants.
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Affiliation(s)
- J Berg
- Ross Grant, The University of Sydney Adventist Hospital Clinical School, 185 Fox Valley Rd, Wahroonga, NSW Australia, Phone: +61 2 9487 9602,
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11
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Zhan Q, Dai Y, Wang F, Mai X, Fu M, Wang P, Wang J. Metabonomic analysis in investigating the anti-osteoporotic effect of sialoglycoprotein isolated from eggs of carassius auratus on ovariectomized mice. J Funct Foods 2019. [DOI: 10.1016/j.jff.2019.103514] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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12
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Wang J, Chen L, Zhang Y, Li CG, Zhang H, Wang Q, Qi X, Qiao L, Da WW, Cui XJ, Lu S, Wang YJ, Shu B. Association between serum vitamin B 6 concentration and risk of osteoporosis in the middle-aged and older people in China: a cross-sectional study. BMJ Open 2019; 9:e028129. [PMID: 31278103 PMCID: PMC6615830 DOI: 10.1136/bmjopen-2018-028129] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
OBJECTIVE To determine the relationship between serum vitamin B6 (Vit B6) concentration and the status of bone mineral density and identify the relationship between serum Vit B6 and bone metabolism parameters in middle-aged and older people in China. DESIGN The present study was a cross-sectional study within the framework of an ongoing prospective population-based cohort study. SETTING AND PARTICIPANTS A total of 1829 residents (men ≥50 years and women ≥45 years) from two subdistricts were recruited from July 2015 to February 2016 in Shanghai, China. MEASURES Recruited residents were grouped (control, osteopenia and osteoporosis) according to their lumbar spine bone mineral density, measured through dual-energy X-ray absorptiometry. Serum Vit B6 concentrations, bone turnover marker concentrations and calcium and phosphorus metabolism parameters were assessed. RESULTS No significant linear trend between serum Vit B6 concentrations and lumbar bone mass was observed in the men. In the women, the average osteoporosis risk was 61% higher at serum Vit B6 concentrations of <19.2 μg/L than at those of >26.9 μg/L (OR 1.61, 95% CI 1.00 to 2.58). However, there was no significance after controlling of serum 25-hydroxy-vitamin D concentration and parathyroid hormone concentration, respectively. In the osteoporotic women, the serum Vit B6 concentration was significantly negatively correlated to concentrations of bone turnover marker including N-terminal propeptide of type I collagen, β-C-terminal telopeptide of type I collagen and osteocalcin. It was also positively related to the serum 25-hydroxy-vitamin D concentration and inversely related to the serum parathyroid hormone concentration. CONCLUSIONS A relatively low serum Vit B6 concentration, even in the normal range, may be a risk factor for osteoporosis in postmenopausal women, which is dependent on serum 25-hydroxy-vitamin D concentration and parathyroid hormone concentration. TRIAL REGISTRATION NUMBER NCT02958020; Post-results.
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Affiliation(s)
- Jing Wang
- Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
- Key Laboratory, Ministry of Education of China, Shanghai, China
| | - Lin Chen
- Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
- Key Laboratory, Ministry of Education of China, Shanghai, China
| | - Yan Zhang
- Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
- Key Laboratory, Ministry of Education of China, Shanghai, China
| | - Chen-guang Li
- Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
- Key Laboratory, Ministry of Education of China, Shanghai, China
| | - Hao Zhang
- Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
- Key Laboratory, Ministry of Education of China, Shanghai, China
| | - Qiang Wang
- Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
- Key Laboratory, Ministry of Education of China, Shanghai, China
| | - Xiaofeng Qi
- Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
- Key Laboratory, Ministry of Education of China, Shanghai, China
| | - Liang Qiao
- Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
- Key Laboratory, Ministry of Education of China, Shanghai, China
| | - Wei-wei Da
- Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
- Key Laboratory, Ministry of Education of China, Shanghai, China
| | - Xue-jun Cui
- Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
- Key Laboratory, Ministry of Education of China, Shanghai, China
| | - Sheng Lu
- Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
- Key Laboratory, Ministry of Education of China, Shanghai, China
| | - Yong-jun Wang
- Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
- Key Laboratory, Ministry of Education of China, Shanghai, China
- Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Bing Shu
- Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
- Key Laboratory, Ministry of Education of China, Shanghai, China
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Ostrakhovitch EA, Tabibzadeh S. Homocysteine and age-associated disorders. Ageing Res Rev 2019; 49:144-164. [PMID: 30391754 DOI: 10.1016/j.arr.2018.10.010] [Citation(s) in RCA: 69] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Revised: 09/30/2018] [Accepted: 10/25/2018] [Indexed: 12/26/2022]
Abstract
There are numerous theories of aging, a process which still seems inevitable. Aging leads to cancer and multi-systemic disorders as well as chronic diseases. Decline in age- associated cellular functions leads to neurodegeneration and cognitive decline that affect the quality of life. Accumulation of damage, mutations, metabolic changes, failure in cellular energy production and clearance of altered proteins over the lifetime, and hyperhomocysteinemia, ultimately result in tissue degeneration. The decline in renal functions, nutritional deficiencies, deregulation of methionine cycle and deficiencies of homocysteine remethylation and transsulfuration cofactors cause elevation of homocysteine with advancing age. Abnormal accumulation of homocysteine is a risk factor of cardiovascular, neurodegenerative and chronic kidney disease. Moreover, approximately 50% of people, aged 65 years and older develop hypertension and are at a high risk of developing cardiovascular insufficiency and incurable neurodegenerative disorders. Increasing evidence suggests inverse relation between cognitive impairment, cerebrovascular and cardiovascular events and renal function. Oxidative stress, inactivation of nitric oxide synthase pathway and mitochondria dysfunction associated with impaired homocysteine metabolism lead to aging tissue degeneration. In this review, we examine impact of high homocysteine levels on changes observed with aging that contribute to development and progression of age associated diseases.
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Affiliation(s)
- E A Ostrakhovitch
- Frontiers in Bioscience Research Institute in Aging and Cancer, Irvine, CA, USA.
| | - S Tabibzadeh
- Frontiers in Bioscience Research Institute in Aging and Cancer, Irvine, CA, USA.
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Rupalika, Naorem KD, Gupta V, Sachdeva M, Kumar A, Saraswathy K. MTHFR C677T polymorphism and nutritional deficiencies: A study among Bhil Tribe of India. GENE REPORTS 2018. [DOI: 10.1016/j.genrep.2018.07.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Effects of vitamin B 12, folate, uric acid, and serum biomarkers of inflammation on bone mineral density in postmenopausal women. MENOPAUSE REVIEW 2018; 17:69-76. [PMID: 30150914 PMCID: PMC6107094 DOI: 10.5114/pm.2018.77305] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2018] [Accepted: 05/04/2018] [Indexed: 12/26/2022]
Abstract
Introduction Despite the accumulating evidence suggesting a possible relationship between femur and lumbar bone mineral density (BMD) and serum uric acid (UA), it is unclear whether alterations in UA levels reflect any underlying subclinical inflammatory conditions in postmenopausal osteoporosis. In addition, the mechanistic link between osteoporosis and dietary factors including vitamin B12 and folate in postmenopausal women is still obscure. The aim of the present study is to investigate the association between serum vitamin B12, folate, UA, and subclinical inflammatory markers and BMD measurements in postmenopausal women. Material and methods One hundred and eighty-four postmenopausal women were recruited for the present study. Clinical data, as well as serum vitamin B12, folate, UA, conventional inflammatory markers, and other related biochemical markers, were assessed for each subject. Bone mineral density measurements of proximal femur and lumbar spine were taken using dual-energy X-ray absorptiometry. Correlation analysis was performed between serum vitamin B12, folate, UA and other biochemical and metabolic parameters. Results Although no association was found between serum inflammatory markers, vitamin B12 and folate levels with femur neck and lumbar spine BMD measurements, elevated UA levels were observed in subjects with normal BMD values. Higher BMD values were obtained in higher UA tertiles. UA (p < 0.001) and BMI (p = 0.003) were found to be correlated with femur neck BMD measurements. Conclusions The femoral and lumbar BMD measurements were associated with serum UA levels. Higher serum UA levels were found to have a protective effect on postmenopausal osteoporosis irrespective of inflammation and dietary factors.
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3'-UTR Polymorphisms of MTHFR and TS Associated with Osteoporotic Vertebral Compression Fracture Susceptibility in Postmenopausal Women. Int J Mol Sci 2018. [PMID: 29534533 PMCID: PMC5877685 DOI: 10.3390/ijms19030824] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Postmenopausal osteoporosis is one of the most prominent diseases in postmenopausal women and it is increasing in prevalence with the aging population. Furthermore, osteoporosis and osteoporotic vertebral compression fractures (OVCFs) are related to mortality and decreased quality of life. Therefore, searching for biomarkers that are able to identify postmenopausal women who are at high risk of developing OVCFs is an effective strategy for improving the quality of life of patients and alleviating social and economic burdens. In this study, we investigated methylenetetrahydrofolate reductase (MTHFR) and thymidylate synthase (TS) gene polymorphisms in postmenopausal women with OVCF. We recruited 301 postmenopausal women and performed genotyping for the presence of MTHFR 2572C>A, 4869C>G and TS 1100C>T, 1170A>G. Genotyping was analyzed using the polymerization chain reaction restriction fragment length polymorphism assay. MTHFR 2572C>A and TS 1100C>T were associated with the prevalence of osteoporosis (MTHFR 2572CC versus CA+AA: odd ratio [OR] adjusted age, hypertention [HTN], and diabetes mellitus [DM] = 0.49, p = 0.012) and the occurrence of OVCFs (MTHFR 2572CC versus CA+AA: OR adjusted age, HTN, and DM = 0.38, p = 0.013; TS 1100CC versus CT+TT: OR adjusted age, HTN, and DM = 0.46, p = 0.02). Our novel finding is the identification of MTHFR and TS genetic variants that decrease susceptibility to OVCFs. Our findings suggest that polymorphisms in the MTHFR and TS genes are associated with susceptibility to osteoporosis and OVCFs in postmenopausal women.
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Macêdo LLGD, Carvalho CMRGD, Cavalcanti JC, Freitas BDJESDA. Vitamin B12, bone mineral density and fracture risk in adults: A systematic review. REVISTA DA ASSOCIACAO MEDICA BRASILEIRA (1992) 2017; 63:801-809. [PMID: 29239465 DOI: 10.1590/1806-9282.63.09.801] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2017] [Accepted: 12/03/2017] [Indexed: 01/30/2023]
Abstract
OBJECTIVE To consolidate information available on the effect of vitamin B12 on bone mineral density and fracture risk, with emphasis on clinical trials, observational and longitudinal data conducted in humans. METHOD A systematic review of the literature of the past decade on the role of vitamin B12 in bone mineral density and fracture risk in subjects of all ages and both sexes was performed by means of a PubMed, Science Direct, Medline and SciELO database search. Articles included in this review were identified using the search terms: B12 Vitamin and Bone Mineral Density and Vitamin B12 and Risk of Fractures. Evidence quality of the included articles was evaluated by GRADE system. RESULTS A total of 25 original studies were identified. After reviewing the titles and abstracts of articles, only 17 articles met the inclusion criteria. The present review provides evidence that the role of vitamin B12 on bone mineral density or fracture risk should be further elucidated. Controversies are explained by heterogeneity of methodologies used for the diagnosis of vitamin B12 and also by differences among populations investigated on the studies. CONCLUSION A real effect of vitamin B12 deficiency in bone health and the mechanisms associated with bone metabolism is not well established yet. It is extremely important to carry out more clarifying studies about this theme, especially with vulnerable groups such as postmenopausal and elderly women, as is well-known that they are greatly affected by deficiency of this vitamin.
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Affiliation(s)
| | | | - Janaína Costa Cavalcanti
- Internal Medicine Residency Training Program at Hospital Regional da Asa Norte, Hospital Universitário, Universidade Federal do Piauí, Brazil
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Behera J, Bala J, Nuru M, Tyagi SC, Tyagi N. Homocysteine as a Pathological Biomarker for Bone Disease. J Cell Physiol 2017; 232:2704-2709. [PMID: 27859269 DOI: 10.1002/jcp.25693] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Accepted: 11/16/2016] [Indexed: 01/04/2023]
Abstract
In the last few decades, perturbation in methyl-group and homocysteine (Hcy) balance have emerged as independent risk factors in a number of pathological conditions including neurodegenerative disease, cardiovascular dysfunction, cancer development, autoimmune disease, and kidney disease. Recent studies report Hcy to be a newly recognized risk factor for osteoporosis. Elevated Hcy levels are known to modulate osteoclastgenesis by causing detrimental effects on bone via oxidative stress induced metalloproteinase-mediated extracellular matrix degradation and decrease in bone blood flow. Evidence from previous studies also suggests that the decreased chondrocytes mediated bone mineralization in chick limb-bud mesenchymal cells and during the gestational period of ossification in rat model. However, Hcy imbalance and its role in bone loss, regression in vascular invasion, and osteoporosis, are not clearly understood. More investigations are required to explore the complex interplay between Hcy imbalance and onset of bone disease progression. This article reviews the current body of knowledge on regulation of Hcy mediated oxidative stress and its role in bone remodeling, vascular blood flow and progression of bone disease. J. Cell. Physiol. 232: 2704-2709, 2017. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Jyotirmaya Behera
- Department of Physiology, School of Medicine, University of Louisville, Louisville, Kentucky
| | - Jyoti Bala
- Department of Physiology, School of Medicine, University of Louisville, Louisville, Kentucky
| | - Mohammed Nuru
- Department of Physiology, School of Medicine, University of Louisville, Louisville, Kentucky
| | - Suresh C Tyagi
- Department of Physiology, School of Medicine, University of Louisville, Louisville, Kentucky
| | - Neetu Tyagi
- Department of Physiology, School of Medicine, University of Louisville, Louisville, Kentucky
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Saber A, Alipour B, Faghfoori Z, Yari Khosroushahi A. Cellular and molecular effects of yeast probiotics on cancer. Crit Rev Microbiol 2016; 43:96-115. [PMID: 27561003 DOI: 10.1080/1040841x.2016.1179622] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The cancer is one of the main causes of human deaths worldwide. The exact mechanisms of initiation and progression of malignancies are not clear yet, but there is a common agreement about the role of colonic microbiota in the etiology of different cancers. Probiotics have been examined for their anti-cancer effects, and different mechanisms have been suggested about their antitumor functions. Nonpathogenic yeasts, as members of probiotics family, can be effective on gut microbiota dysbiosis. Generally safe yeasts have shown so many beneficial effects on human health. Probiotic yeasts influence physiology, metabolism, and immune homeostasis in the colon and contribute to cancer treatment due to possessing anti-inflammatory, anti-proliferative and anti-cancer properties. This study reviews some of the health-beneficial effects of probiotic yeasts and their biological substances like folic acid and β-glucan on cancer and focuses on the possible cellular and molecular mechanisms of probiotic yeasts such as influencing pathogenic bacteria, inactivation of carcinogenic compounds, especially those derived from food, improvement of intestinal barrier function, modulation of immune responses, antitoxic function, apoptosis, and anti-proliferative effects.
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Affiliation(s)
- Amir Saber
- a Biotechnology Research Center, Faculty of Nutrition, Tabriz University of Medical Sciences , Tabriz , Iran.,b Student Research Committee, Faculty of Nutrition, Tabriz University of Medical Sciences , Tabriz , Iran.,c Department of Biochemistry and Diet Therapy , Faculty of Nutrition, Tabriz University of Medical Sciences , Tabriz , Iran
| | - Beitollah Alipour
- c Department of Biochemistry and Diet Therapy , Faculty of Nutrition, Tabriz University of Medical Sciences , Tabriz , Iran.,d Nutrition Research Center, Faculty of Nutrition, Tabriz University of Medical Sciences , Tabriz , Iran
| | - Zeinab Faghfoori
- e Faculty of Medicine, Semnan University of Medical Sciences , Semnan , Iran
| | - Ahmad Yari Khosroushahi
- f Drug Applied Research Center, Faculty of Pharmacy, Tabriz University of Medical Sciences , Tabriz , Iran.,g Department of Pharmacognosy , Faculty of Pharmacy, Tabriz University of Medical Sciences , Tabriz , Iran
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Oxidative Stress-Related Biomarkers in Postmenopausal Osteoporosis: A Systematic Review and Meta-Analyses. DISEASE MARKERS 2016; 2016:7067984. [PMID: 27594735 PMCID: PMC4995322 DOI: 10.1155/2016/7067984] [Citation(s) in RCA: 105] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/05/2016] [Accepted: 07/03/2016] [Indexed: 01/02/2023]
Abstract
Numerous studies suggested that oxidative stress (OS) played a central role in the onset and development of postmenopausal osteoporosis (PO); however, conflicting results were obtained as to the association of OS-related biomarkers and PO. This meta-analysis aimed to identify the association between these markers and PO, and explore factors that may explain the inconsistencies in these results. A systematic literature search was conducted in relevant database. Search terms and selection criteria were priorly determined to identify and include all studies that detected markers of OS in PO patients. We pooled data with a random effects meta-analysis with standardized mean differences and 95% confidence interval. Total 17 studies including 12 OS markers were adopted. The results showed that superoxide dismutase (SOD) in erythrocytes, catalase (CAT), total antioxidant status (TAS), hydroperoxides (HY), advanced oxidation protein products (AOPP), malondialdehyde (MDA), and vitamin B12 (VB12) in plasma/serum were not statistically different between the PO and control group, whereas significantly increased level of homocysteine (Hcy) and nitric oxide (NO), along with decreased SOD, glutathione peroxidase (GPx), folate, and total antioxidant power (TAP) in plasma/serum were obtained in the PO group. In summary, OS might serve as potential biomarkers in the etiopathophysiology and clinical course of PO.
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B-vitamins and bone health--a review of the current evidence. Nutrients 2015; 7:3322-46. [PMID: 25961321 PMCID: PMC4446754 DOI: 10.3390/nu7053322] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2015] [Revised: 04/24/2015] [Accepted: 04/27/2015] [Indexed: 12/23/2022] Open
Abstract
Because of ongoing global ageing, there is a rapid worldwide increase in incidence of osteoporotic fractures and the resultant morbidity and mortality associated with these fractures are expected to create a substantial economic burden. Dietary modification is one effective approach for prevention of osteoporosis in the general population. Recently, B vitamins have been investigated for their possible roles in bone health in human studies. In this review, we provide different lines of evidence and potential mechanisms of individual B vitamin in influencing bone structure, bone quality, bone mass and fracture risk from published peer-reviewed articles. These data support a possible protective role of B vitamins, particularly, B2, B6, folate and B12, in bone health. However, results from the clinical trials have not been promising in supporting the efficacy of B vitamin supplementation in fracture reduction. Future research should continue to investigate the underlying mechanistic pathways and consider interventional studies using dietary regimens with vitamin B enriched foods to avoid potential adverse effects of high-dose vitamin B supplementation. In addition, observational and interventional studies conducted in Asia are limited and thus require more attention due to a steep rise of osteoporosis and hip fracture incidence projected in this part of the world.
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Enneman AW, Swart KMA, van Wijngaarden JP, van Dijk SC, Ham AC, Brouwer-Brolsma EM, van der Zwaluw NL, Dhonukshe-Rutten RAM, van der Cammen TJM, de Groot LCPGM, van Meurs J, Lips P, Uitterlinden AG, Zillikens MC, van Schoor NM, van der Velde N. Effect of Vitamin B12 and Folic Acid Supplementation on Bone Mineral Density and Quantitative Ultrasound Parameters in Older People with an Elevated Plasma Homocysteine Level: B-PROOF, a Randomized Controlled Trial. Calcif Tissue Int 2015; 96:401-9. [PMID: 25712255 PMCID: PMC4415946 DOI: 10.1007/s00223-015-9968-6] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/19/2014] [Accepted: 02/09/2015] [Indexed: 11/03/2022]
Abstract
High plasma homocysteine (Hcy) levels are associated with increased osteoporotic fracture incidence. However, the mechanism remains unclear. We investigated the effect of Hcy-lowering vitamin B12 and folic acid treatment on bone mineral density (BMD) and calcaneal quantitative ultrasound (QUS) parameters. This randomized, double-blind, placebo-controlled trial included participants aged ≥65 years with plasma Hcy levels between 12 and 50 µmol/L. The intervention comprised 2-year supplementation with either a combination of 500 µg B12, 400 µg folic acid, and 600 IU vitamin D or placebo with 600 IU vitamin D only. In total, 1111 participants underwent repeated dual-energy X-ray assessment and 1165 participants underwent QUS. Femoral neck (FN) BMD, lumbar spine (LS) BMD, calcaneal broadband ultrasound attenuation (BUA), and calcaneal speed of sound (SOS) were assessed. After 2 years, FN-BMD and BUA had significantly decreased, while LS-BMD significantly increased (all p < 0.01) and SOS did not change in either treatment arm. No statistically significant differences between the intervention and placebo group were present for FN-BMD (p = 0.24), LS-BMD (p = 0.16), SOS (p = 0.67), and BUA (p = 0.96). However, exploratory subgroup analyses revealed a small positive effect of the intervention on BUA at follow-up among compliant persons >80 years (estimated marginal mean 64.4 dB/MHz for the intervention group and 61.0 dB/MHz for the placebo group, p = 0.04 for difference). In conclusion, this study showed no overall effect of treatment with vitamin B12 and folic acid on BMD or QUS parameters in elderly, mildly hyperhomocysteinemic persons, but suggests a small beneficial effect on BUA in persons >80 years who were compliant in taking the supplement.
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Affiliation(s)
- Anke W. Enneman
- Department of Internal Medicine, Erasmus MC, University Medical Center Rotterdam, P.O. Box 2040, 3000 CA Rotterdam, The Netherlands
| | - Karin M. A. Swart
- Department of Epidemiology and Biostatistics and the EMGO Institute for Health and Care Research, VU University Medical Center, Van der Boechorststraat 7, 1081 BT Amsterdam, The Netherlands
| | | | - Suzanne C. van Dijk
- Department of Internal Medicine, Erasmus MC, University Medical Center Rotterdam, P.O. Box 2040, 3000 CA Rotterdam, The Netherlands
| | - Annelies C. Ham
- Department of Internal Medicine, Erasmus MC, University Medical Center Rotterdam, P.O. Box 2040, 3000 CA Rotterdam, The Netherlands
| | - Elske M. Brouwer-Brolsma
- Division of Human Nutrition, Wageningen University, P.O. Box 8129, 6700 EV Wageningen, The Netherlands
| | - Nikita L. van der Zwaluw
- Division of Human Nutrition, Wageningen University, P.O. Box 8129, 6700 EV Wageningen, The Netherlands
| | | | - Tischa J. M. van der Cammen
- Department of Internal Medicine, Erasmus MC, University Medical Center Rotterdam, P.O. Box 2040, 3000 CA Rotterdam, The Netherlands
| | | | - Joyce van Meurs
- Department of Internal Medicine, Erasmus MC, University Medical Center Rotterdam, P.O. Box 2040, 3000 CA Rotterdam, The Netherlands
| | - Paul Lips
- Department of Epidemiology and Biostatistics and the EMGO Institute for Health and Care Research, VU University Medical Center, Van der Boechorststraat 7, 1081 BT Amsterdam, The Netherlands
- Department of Endocrinology, VU University Medical Center, P.O. Box 7057, 1007 MB Amsterdam, The Netherlands
| | - André G. Uitterlinden
- Department of Internal Medicine, Erasmus MC, University Medical Center Rotterdam, P.O. Box 2040, 3000 CA Rotterdam, The Netherlands
| | - M. Carola Zillikens
- Department of Internal Medicine, Erasmus MC, University Medical Center Rotterdam, P.O. Box 2040, 3000 CA Rotterdam, The Netherlands
| | - Natasja M. van Schoor
- Department of Epidemiology and Biostatistics and the EMGO Institute for Health and Care Research, VU University Medical Center, Van der Boechorststraat 7, 1081 BT Amsterdam, The Netherlands
| | - Nathalie van der Velde
- Department of Internal Medicine, Erasmus MC, University Medical Center Rotterdam, P.O. Box 2040, 3000 CA Rotterdam, The Netherlands
- Department of Internal Medicine, Section of Geriatric Medicine, Academic Medical Center, P.O. Box 22700, 1100 DD Amsterdam, The Netherlands
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Jianbo L, Zhang H, Yan L, Xie M, Mei Y, Jiawei C. Homocysteine, an additional factor, is linked to osteoporosis in postmenopausal women with type 2 diabetes. J Bone Miner Metab 2014; 32:718-24. [PMID: 24366622 DOI: 10.1007/s00774-013-0548-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/11/2013] [Accepted: 11/11/2013] [Indexed: 12/21/2022]
Abstract
We explored the relationship between plasma total homocysteine concentration and osteoporosis in postmenopausal patients with type 2 diabetes. Postmenopausal patients with type 2 diabetes (n = 258) were enrolled in a cross-sectional hospital-based study. Osteoporosis was documented by dual energy X-ray absorptiometry. Plasma total homocysteine concentration was measured using fluorescence polarization immunoassay. Risk factors for osteoporosis and determinants of homocysteine were obtained from blood samples and interviewer questionnaire. We found that plasma total homocysteine levels were higher in subjects with osteoporosis and diabetes than without [(9.5 ± 2.0) vs. (10.4 ± 2.4) μmol/l, p = 0.001]. The association of homocysteine with osteoporosis was independent of possible risk factors for osteoporosis in diabetes (e.g., duration of diabetes, HbA1c, body mass index, serum 25-hydroxyvitamin D, thiazolidinediones, and retinopathy) and determinants of homocysteine concentration (age, serum folate and vitamin B12, renal status, and biguanide use) [OR 1.40 (1.02-1.90), p = 0.036]. In addition, bone mineral density was closely correlated with homocysteine as a continuous variable after adjusting for age [r = -0.64 (-0.69 to -0.58), p = 0.002]. Furthermore, per increase of 5.0 μmol/l, plasma homocysteine was related to osteoporosis, after controlling for per unit increase of other factors [OR 1.42 (1.07-1.96), p = 0.027]. The optimal cut-off point for the plasma homocysteine level distinguishing diabetic patients with osteoporosis from without was 10.18 μmol/l. The results suggest that plasma total homocysteine concentration is independently associated with the occurrence of osteoporosis in postmenopausal patients with type 2 diabetes. Future prospective studies are warranted to clarify the relationship.
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Affiliation(s)
- Li Jianbo
- Diabetes and Osteoporosis Study Group, Endocrinology and Metabolism Department, The First Affiliated Hospital of Nanjing Medical University, Guangzhou Road 300, Nanjing, 210029, China,
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Li T, Wu SM, Xu ZY, Ou-Yang S. Rabbiteye blueberry prevents osteoporosis in ovariectomized rats. J Orthop Surg Res 2014; 9:56. [PMID: 25102951 PMCID: PMC4237865 DOI: 10.1186/s13018-014-0056-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/20/2014] [Accepted: 06/20/2014] [Indexed: 11/23/2022] Open
Abstract
Objective It has been forecasted that the rabbiteye blueberry could inhibit osteoporosis. However, the inhibition and prevention of osteoporosis via rabbiteye blueberry are still elusive. This study was aim to evaluate the anti-osteoporosis effects of rabbiteye blueberry in ovariectomized rats. Methods Thirty rats were randomly divided into three groups of ten rats each as follows: sham-operated group (SG), ovariectomized model control group (OMG), and ovariectomized rabbiteye blueberry treatment group (OBG). The blood mineral levels, the alkaline phosphatase (ALP) activity, and osteoprotegerin (OPG) level were determined. The expression analyses of type I collagen, integrin-β1, and focal adhesion kinase (FAK) were performed. Besides, the bone mineral density (BMD) and bone histomorphometry (BH) were measured. Results The ALP activity in SG and OBG was significantly lower than that in OMG. For the OPG level, the significant increase of OPG level in OBG was indicated compared with the other groups. The mRNA expression levels of type I collagen, integrin-β1, and FAK in OMG were significantly lower than those in other groups. The BMD in OMG were all significantly lower than those in SG and OBG. For BH, blueberry significantly improved the trabecular bone volume fraction, trabecular thickness, mean trabecular bone number, and bone formation rate, and decreased the trabecular separation, the percent of bone resorption perimeter, and mean osteoclast number in OBG compared with OMG. Conclusions The rabbiteye blueberries had an effective inhibition in bone resorption, bone loss, and reduction of bone strength of ovariectomized rats and could improve the BMD, osteogenic activity, and trabecular bone structure.
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Affiliation(s)
| | | | - Zhi-Yuan Xu
- Department of Emergency, The Third Affiliated Hospital of Southern Medical University, Guangzhou 510630, China.
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Yamada C, Fujimoto S, Ikeda K, Nomura Y, Matsubara A, Kanno M, Shide K, Tanaka K, Imai E, Fukuwatari T, Shibata K, Inagaki N. Relationship of homocysteine and homocysteine-related vitamins to bone mineral density in Japanese patients with type 2 diabetes. J Diabetes Investig 2014; 2:233-9. [PMID: 24843489 PMCID: PMC4014924 DOI: 10.1111/j.2040-1124.2010.00088.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Aims/Introduction: To estimate nutritional risk factors for osteoporosis in patients with type 2 diabetes, bone mineral density, homocysteine level, and intakes and levels of Hcy‐related vitamins including folate, vitamin B6 and vitamin B12 were analyzed in a cross‐sectional study. Materials and Methods: Lumbar spine and femoral neck bone mineral density, serum concentrations of vitamin B6, vitamin B12, and folate and plasma homocysteine levels were measured in 125 Japanese patients with type 2 diabetes. Nutrient intake values were evaluated using a food frequency questionnaire. Results: Homocysteine was inversely correlated with bone mineral density, and with both dietary intake and serum concentration of folate. Intake of green vegetables was correlated with intake and level of folate and homocysteine levels. When the population was analyzed across the quartiles, bone mineral density, serum folate concentration, folate intake and intake of green vegetables were lowest in the highest homocysteine group. Conclusions: In patients with type 2 diabetes, the nutritional status of folate might affect the homocysteine level, a putative risk factor for osteoporosis. (J Diabetes Invest, doi: 10.1111/j.2040‐1124.2010.00088.x, 2011)
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Affiliation(s)
- Chizumi Yamada
- Department of Diabetes and Clinical Nutrition, Graduate School of Medicine, Kyoto University
| | - Shimpei Fujimoto
- Department of Diabetes and Clinical Nutrition, Graduate School of Medicine, Kyoto University
| | - Kaori Ikeda
- Department of Diabetes and Clinical Nutrition, Graduate School of Medicine, Kyoto University
| | - Yuki Nomura
- Department of Metabolism and Clinical Nutrition, Kyoto University Hospital, Kyoto
| | - Ami Matsubara
- Department of Metabolism and Clinical Nutrition, Kyoto University Hospital, Kyoto
| | - Miwako Kanno
- Department of Metabolism and Clinical Nutrition, Kyoto University Hospital, Kyoto
| | - Kenichiro Shide
- Department of Metabolism and Clinical Nutrition, Kyoto University Hospital, Kyoto
| | - Kiyoshi Tanaka
- School of Human Culture, The University of Shiga Prefecture, Hikone
| | - Eri Imai
- Department of Food and Nutrition, Kyoto Women's University, Kyoto, Japan
| | - Tsutomu Fukuwatari
- Department of Food and Nutrition, Kyoto Women's University, Kyoto, Japan
| | - Katsumi Shibata
- Department of Food and Nutrition, Kyoto Women's University, Kyoto, Japan
| | - Nobuya Inagaki
- Department of Diabetes and Clinical Nutrition, Graduate School of Medicine, Kyoto University
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Abstract
AIM To explore the relationship between plasma total homocysteine concentration and diabetic macular edema in patients with type 2 diabetes. METHODS Patients with type 2 diabetes (n = 176) were enrolled in a cross-sectional hospital-based study. Diabetic macular edema status was documented by fundus photographs. Plasma total homocysteine concentration was measured using fluorescence polarization immunoassay. Normal control plasma homocysteine was established in 115 healthy subjects. Risk factors for diabetic macular edema were obtained from fasting blood samples and interviewer questionnaire. RESULTS Diabetic patients had increased plasma homocysteine compared with normal control. Plasma homocysteine levels were higher in subjects with diabetic macular edema than without ((11.4 ± 2.7) versus (8.5 ± 1.9) (μmol/l), p = 0.000). The association of homocysteine with diabetic macular edema was independent of major risk factors for diabetic macular edema (duration of diabetes, HbA1c, lipid) and determinants of higher homocysteine concentration (age, gender, serum folate and vitamin B12, renal status, and biguanide use) (OR: 1.63 (1.02-2.14), p = 0.018). Furthermore, per increase of 5.0 μmol/l plasma homocysteine was related to macular edema, after controlling for per unit increase of other factors (OR: 1.64 (1.04-2.16), p = 0.019). CONCLUSIONS Plasma total homocysteine concentration is independently associated with the occurrence of macular edema in type 2 diabetes. Future prospective studies are warranted to clarify the relationship.
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Affiliation(s)
- Jianbo Li
- Department of Endocrinology and Metabolism, The First Affiliated Hospital of Nanjing Medical University , Nanjing , China , and
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Zhang H, Tao X, Wu J. Association of homocysteine, vitamin B12, and folate with bone mineral density in postmenopausal women: a meta-analysis. Arch Gynecol Obstet 2013; 289:1003-9. [PMID: 24193243 DOI: 10.1007/s00404-013-3075-6] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2013] [Accepted: 10/24/2013] [Indexed: 12/22/2022]
Abstract
BACKGROUND The relationship of homocysteine (Hcy), folate, and vitamin B12 with bone mineral density (BMD) has been investigated in postmenopausal women. However, the relationship is still controversial. PURPOSE To evaluate the association of Hcy, folate, vitamin B12 and BMD in postmenopausal women with a meta-analysis. METHODS We searched for all published articles indexed in Medline (1950-2012), Embase (1974-2012), and China National Knowledge Infrastructure (1994-2012). Any case-control or cohort study relating to Hcy, vitamin B12, folate, and BMD was included, and the data were extracted independently by two reviewers. Criteria for inclusion were the assessment of Hcy, vitamin B12, folate, and BMD in postmenopausal women as outcomes. We performed this meta-analysis with Review Manager 5.1 software. Odds ratios and 95 % confidence intervals (CI) were used to evaluate the results. RESULTS Six eligible studies were selected for meta-analysis. Our analysis suggested that vitamin B12 and Hcy levels were significantly higher in postmenopausal osteoporosis (PMOP) group than that in controls (P = 0.007, <0.05; 95 % CI 3.06-19.38 and P = 0.0003, <0.05; 95 % CI 0.75-2.52, respectively). Folate level was lower in PMOP group than that in controls, but this difference was not statistically significant (P = 0.09, 95 % CI -3.33 to 0.25). CONCLUSIONS Hcy and vitamin B12, but not folate, were related to BMD in PMOP. Extra vitamin B12 may not play a protective role for osteoporosis in postmenopausal women. Future studies are needed to confirm them, especially the relationship between increased vitamin B12 and BMD.
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Affiliation(s)
- Hongxiu Zhang
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Nanjing Medical University, 300 Guangzhou Road, 210029, Nanjing, China
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Association of the MTHFR C677T polymorphism and bone mineral density in postmenopausal women: a meta-analysis. J Biomed Res 2013; 24:417-23. [PMID: 23554658 PMCID: PMC3596689 DOI: 10.1016/s1674-8301(10)60056-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2010] [Revised: 09/29/2010] [Accepted: 10/19/2010] [Indexed: 11/20/2022] Open
Abstract
Osteoporosis is a condition characterized by low bone mineral density (BMD) and micro-architectural changes in the bone tissue. The risk of osteoporosis is partly determined by genetic factors. The role of C677T polymorphism of methylenetetrahydrofolate reductase (MTHFR) gene has been investigated in postmenopausal osteoporosis. However, the relationship between MTHFR polymorphism and BMD is still controversial. We carried out a meta-analysis of 5,833 subjects to evaluate the association of MTHFR and BMD in postmenopausal women. Databases of MEDLINE, Web of Science, Scopus and CNKI were retrieved for all publications relating to MTHFR polymorphism and BMD in postmenopausal women. Five eligible studies were selected for meta-analysis. All these articles studied the association of MTHFR polymorphism and BMD of the femoral neck and lumbar spine in postmenopausal women. Our analysis suggested that postmenopausal women with the TT genotype had lower femoral neck BMD than the women with the CC/CT genotype, and the weighted mean difference (WMD) was -0.01 g/cm(2) [95% confidence interval (CI): (-0.01, -0.01), P < 0.01]. However, BMD of the lumbar spine of postmenopausal women with the TT genotype was not significantly different from that of women with the CC/CT genotype. In the random effects model, the WMD between the TT and TC/CC genotype was -0.01 g/cm(2) [95% CI: (-0.04, 0.01), P = 0.32]. The C677T polymorphism of the MTHFR gene is associated with BMD of the femoral neck in postmenopausal women. Women with the TT genotype of the MTHFR gene have lower BMD, suggesting that the TT genotype may be a risk factor for postmenopausal osteoporosis.
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Folic acid and vitamin B(12) supplementation lowers plasma homocysteine but has no effect on serum bone turnover markers in elderly women: a randomized, double-blind, placebo-controlled trial. Nutr Res 2013; 33:211-9. [PMID: 23507227 DOI: 10.1016/j.nutres.2013.01.002] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2012] [Revised: 12/05/2012] [Accepted: 01/02/2013] [Indexed: 11/24/2022]
Abstract
An elevated homocysteine level is a newly recognized risk factor for osteoporosis. Older individuals may have elevated homocysteine levels due to inadequate folate intake and/or lower absorption of vitamin B(12). The aim of this study was to determine whether there is an impact of folic acid and vitamin B(12) supplementation on homocysteine levels and, subsequently, on bone turnover markers in older women with mildly to moderately elevated homocysteine levels. It is hypothesized that supplementation with folic acid and vitamin B(12) will improve homocysteine levels and, in turn, positively modify bone turnover markers in this population. This randomized, double-blind, placebo-controlled trial included 31 women (65 to 93 years) with homocysteine levels greater than 10 μmol/L. Participants were randomly assigned to receive either a daily folic acid (800 μg) and vitamin B(12) (1000 μg) (n = 17) or a matching placebo (n = 14) for 4 months. The results showed significantly lower homocysteine concentrations in the vitamin group compared to the placebo group (10.6 vs 18.5 μmol/L, P = .007). No significant difference in serum alkaline phosphatase or C-terminal cross-linking telopeptide of type I collagen was found between the vitamin and placebo groups before or after supplementation. The use of folic acid and vitamin B(12) as a dietary supplement to improve homocysteine levels could be beneficial for older women, but additional research must be conducted in a larger population and for a longer period to determine if there is an impact of supplementation on bone turnover markers or other indicators of bone health.
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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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31
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Coussirat C, Batista C, Schneider RH, Resende TDL, Schwanke CHA. Vitaminas B12, B6, B9 e homocisteína e sua relação com a massa óssea em idosos. REVISTA BRASILEIRA DE GERIATRIA E GERONTOLOGIA 2012. [DOI: 10.1590/s1809-98232012000300018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
O número de idosos nos últimos anos tem apresentado incremento em todo o mundo, o que acaba gerando inúmeras preocupações com a saúde dessa população, já que nessa fase da vida as alterações fisiológicas os tornam mais propensos a doenças, principalmente as crônicas não-transmissíveis. A osteoporose, uma doença osteometabólica frequente nos idosos, torna-se alvo de importantes estudos, uma vez que suas consequências afetam tanto a saúde física quanto a psicossocial. Contudo, são diversos os fatores que predispõem à osteoporose, entre os quais a deficiência de vitamina B12, vitamina B9 (folato) e vitamina B6 (piridoxina). A carência dessas vitaminas eleva os níveis de homocisteína, que age interferindo nas ligações cruzadas do colágeno, resultando em diminuição da resistência óssea e, consequentemente, na osteoporose e fraturas ósseas tanto em homens quanto em mulheres. Nesse contexto, este artigo tem como objetivo realizar uma revisão de literatura nas bases de dados LILACS e PubMed, sobre a relação dos níveis séricos de vitamina B12, folato, vitamina B6 e homocisteína com a diminuição da massa óssea em idosos.
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32
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Affiliation(s)
- Hala Ahmadieh
- Department of Internal Medicine, American University of Beirut, Beirut, Lebanon
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33
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Bone mineral density is not associated with homocysteine level, folate and vitamin B12 status. Arch Gynecol Obstet 2011; 285:991-1000. [DOI: 10.1007/s00404-011-2079-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2011] [Accepted: 08/30/2011] [Indexed: 10/17/2022]
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34
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Jianbo L, Yuche C, Ming S, Jingrong T, Qing D, Yu Z, Jiawei C, Hongxing W. Association of homocysteine with peripheral neuropathy in Chinese patients with type 2 diabetes. Diabetes Res Clin Pract 2011; 93:38-42. [PMID: 21481484 DOI: 10.1016/j.diabres.2011.03.020] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/06/2011] [Revised: 02/18/2011] [Accepted: 03/14/2011] [Indexed: 10/18/2022]
Abstract
AIM To explore the relationship between plasma total homocysteine concentration and diabetic neuropathy in Chinese patients with type 2 diabetes. METHODS Chinese patients with type 2 diabetes (n=249) were enrolled in a cross-sectional hospital based study. Diabetic neuropathy status was documented by presence of clinical signs and confirmed by electromyography. Plasma total homocysteine concentration was measured using fluorescence polarization immunoassay. Traditional risk factors for diabetic neuropathy were obtained from fasting blood samples and interviewer-questionnaire. RESULTS Plasma total homocysteine levels were higher in subjects with diabetic neuropathy than without (12.8 (9.2-14.8) μmol/l vs. 8.0 (7.7-9.1) μmol/l, p=0.005). The association of homocysteine with diabetic neuropathy was independent of major traditional risk factors for diabetic neuropathy (duration of diabetes, HbA1c) and determinants of higher homocysteine concentration (age, gender, serum folate and vitamin B12, renal status, and Biguanide use) (OR: 1.12 (1.00-1.25), p=0.042). Furthermore, per increase of 4.0 μmol/l plasma homocysteine was related to neuropathy, after controlling for per unit increase of other factors (OR: 1.17 (0.94-1.33), p=0.045). CONCLUSION Plasma total homocysteine concentration was independently associated with occurrence of diabetic neuropathy in Chinese people. Future prospective studies are warranted to clarify the relationship.
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Affiliation(s)
- Li Jianbo
- Endocrinology and Metabolism Department, The First Affiliated Hospital of Nanjing Medical University, Guangzhou Road 300, Nanjing 210029, China.
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Association of vascular endothelial growth factor gene polymorphisms with osteoporotic vertebral compression fractures in postmenopausal women. Genes Genomics 2010. [DOI: 10.1007/s13258-010-0013-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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36
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Agueda L, Urreizti R, Bustamante M, Jurado S, Garcia-Giralt N, Díez-Pérez A, Nogués X, Mellibovsky L, Grinberg D, Balcells S. Analysis of three functional polymorphisms in relation to osteoporosis phenotypes: replication in a Spanish cohort. Calcif Tissue Int 2010; 87:14-24. [PMID: 20390408 DOI: 10.1007/s00223-010-9361-4] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/10/2009] [Accepted: 03/24/2010] [Indexed: 01/11/2023]
Abstract
Osteoporosis is a complex disease involving many putative genetic factors. Association analysis of functional SNPs in candidate genes is an important tool for their identification. However, this approach is affected by limited power, population stratification, and other drawbacks that lead to discordant results. Replication in independent cohorts is essential. We performed association analyses of three functional polymorphisms previously associated with bone phenotypes--namely, Ala222Val in MTHFR, Ile1062Val in LRP6, and -13910C>T in LCT--in a cohort of 944 postmenopausal Spanish women, all of them with lumbar spine (LS) bone mineral density (BMD) data and most with femoral neck (FN) BMD and fracture data. We found significant differences between genotypes only for the MTHFR polymorphism and vertebral factures, with an OR of 2.27 (95% CI 1.17-4.38) for the TT vs. CC/CT genotypes, P = 0.018. We present genotype and allele frequency data for LCT -13910C>T for a Spanish population, where the T allele (conferring lactase persistence) has a frequency of 38.6%. Genotype frequencies were consistent with observed clines in Europe and with the prevalence of lactase nonpersistence. The LCT -13910C>T polymorphism was significantly associated with height and weight, such that T allele carriers were 0.88 cm taller (95% CI 0.08-1.59 cm, P = 0.032, adjusted by age) than CC individuals and TT homozygotes were 1.91 kg heavier than CC/CT individuals (95% CI 0.11-3.71 kg, P = 0.038, adjusted by age). In conclusion, no significant association was observed between the studied polymorphisms and LS BMD or FN BMD in postmenopausal Spanish women, and only MTHFR Ala222Val was associated with vertebral fractures.
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Affiliation(s)
- Lídia Agueda
- Department of Genetics, Faculty of Biology, University of Barcelona, Barcelona, Spain
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37
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Thaler R, Spitzer S, Rumpler M, Fratzl-Zelman N, Klaushofer K, Paschalis EP, Varga F. Differential effects of homocysteine and beta aminopropionitrile on preosteoblastic MC3T3-E1 cells. Bone 2010; 46:703-9. [PMID: 19895920 DOI: 10.1016/j.bone.2009.10.038] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/22/2009] [Revised: 10/26/2009] [Accepted: 10/27/2009] [Indexed: 01/22/2023]
Abstract
Compounds, like beta-aminopropionitrile (bAPN) and homocysteine (hcys), are known to inhibit a stable matrix formation. Osteoblast-synthesized collagen matrix regulates the differentiation of precursor cells into mature osteoblasts. They express lysyl oxidase, an enzyme involved in the collagen cross-linking process. Lately, plasma hcys levels have recently been strongly correlated with fracture in humans. We have previously shown that bAPN not only disturbs collagen cross-links but also affects osteoblastic differentiation in a cell culture system. The aim of the present study was to investigate the effects of bAPN and hcys on collagen cross-links and gene expression at the mRNA level by FTIR and quantitative RT-PCR, respectively. We found that bAPN and hcys down-regulated cell multiplication. While bAPN also down-regulated the metabolic activity of MC3T3-E1 cells, hcys down-regulated it by lower concentrations but up-regulated it by higher; both substances up-regulated alkaline phosphatase activity. The substances increased the ratio of pyr/divalent cross-links of collagen, and down-regulated mRNA expression of lysyl hydroxylase (Plod2) and lysyl oxidase (Lox), genes which play an important role in the formation of a stable matrix. Furthermore, we demonstrate that both substances stimulated the expression of Runx2, an indispensable regulator of osteoblastic differentiation. However, analysis of genome wide mRNA expression suggests that hcys and bAPN have differential effects on genes involved in osteoblastic differentiation and phenotype regulation. The results indicate that although both bAPN and hcys affect collagen cross-link post-translational modifications in a similar manner as far as pyr and divalent cross-links are concerned, they have differential effects on the monitored genes expression at the mRNA level, with hcys exerting a broader effect on the genome wide mRNA expression.
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Affiliation(s)
- Roman Thaler
- Ludwig Boltzmann Institute of Osteology, Hanusch Hospital, Vienna, Austria
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38
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Halıloglu B, Aksungar FB, Ilter E, Peker H, Akın FT, Ozekıcı U. Relationship between bone mineral density, bone turnover markers and homocysteine, folate and vitamin B12 levels in postmenopausal women. Arch Gynecol Obstet 2009; 281:663-8. [DOI: 10.1007/s00404-009-1297-4] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2009] [Accepted: 11/12/2009] [Indexed: 01/22/2023]
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39
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Sodi R, Hazell M, Durham B, Rees C, Ranganath L, Fraser W. The circulating concentration and ratio of total and high molecular weight adiponectin in post-menopausal women with and without osteoporosis and its association with body mass index and biochemical markers of bone metabolism. Clin Biochem 2009; 42:1375-80. [DOI: 10.1016/j.clinbiochem.2009.06.003] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2009] [Revised: 05/24/2009] [Accepted: 06/01/2009] [Indexed: 01/17/2023]
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Chacón IJ, Molero AE, Pino-Ramírez G, Luchsinger JA, Lee JH, Maestre GE. Risk of dementia associated with elevated plasma homocysteine in a latin american population. Int J Alzheimers Dis 2009; 2009. [PMID: 20798752 PMCID: PMC2925085 DOI: 10.4061/2009/632489] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2009] [Revised: 06/16/2009] [Accepted: 07/22/2009] [Indexed: 11/26/2022] Open
Abstract
The relationship between total homocysteine (tHcy) and dementia risk remains controversial, as the association varies among populations and dementia subtypes. We studied a Venezuelan population that has high prevalence of both elevated tHcy and dementia. We tested the hypotheses that (1) elevated tHcy is associated with increased dementia risk, (2) the risk is greater for vascular dementia (VaD) than for Alzheimer's disease (AD), and (3) a history of stroke may partly explain this association. 2100 participants (≥55 years old) of the Maracaibo Aging Study underwent standardized neurological, neuropsychiatric, and cardiovascular assessments. Elevated tHcy was significantly associated with dementia, primarily VaD. When history of stroke and other confounding factors were taken into account, elevated tHcy remained a significant risk factor in older (>66 years), but not in younger (55–66 years) subjects. Ongoing studies of this population may provide insight into the mechanism by which tHcy increases risk for dementia.
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Affiliation(s)
- Inara J Chacón
- Gertrude H. Sergievsky Center, Columbia University, New York, NY, USA
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Vaes BLT, Lute C, Blom HJ, Bravenboer N, de Vries TJ, Everts V, Dhonukshe-Rutten RA, Müller M, de Groot LCPGM, Steegenga WT. Vitamin B(12) deficiency stimulates osteoclastogenesis via increased homocysteine and methylmalonic acid. Calcif Tissue Int 2009; 84:413-22. [PMID: 19363664 DOI: 10.1007/s00223-009-9244-8] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/27/2008] [Accepted: 03/08/2009] [Indexed: 10/20/2022]
Abstract
The risk of nutrient deficiencies increases with age in our modern Western society, and vitamin B(12) deficiency is especially prevalent in the elderly and causes increased homocysteine (Hcy) and methylmalonic acid (MMA) levels. These three factors have been recognized as risk factors for reduced bone mineral density and increased fracture risk, though mechanistic evidence is still lacking. In the present study, we investigated the influence of B(12), Hcy, and MMA on differentiation and activity of bone cells. B(12) deficiency did not affect the onset of osteoblast differentiation, maturation, matrix mineralization, or adipocyte differentiation from human mesenchymal stem cells (hMSCs). B(12) deficiency caused an increase in the secretion of Hcy and MMA into the culture medium by osteoblasts, but Hcy and MMA appeared to have no effect on hMSC osteoblast differentiation. We further studied the effect of B(12), Hcy, and MMA on the formation of multinucleated tartrate-resistant acid phosphatase-positive osteoclasts from mouse bone marrow. We observed that B(12) did not show an effect on osteoclastogenesis. However, Hcy as well as MMA were found to induce osteoclastogenesis in a dose-dependent manner. On the basis of these results, we conclude that B(12) deficiency may lead to decreased bone mass by increased osteoclast formation due to increased MMA and Hcy levels.
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Affiliation(s)
- Bart L T Vaes
- Division of Human Nutrition, Wageningen University and Research Centre, Wageningen, The Netherlands.
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Abstract
Bone tissue quality is determined not only by multiple architectural variables, but also by the mechanical properties of collagen type 1. Homocysteinuria is a genetic disease whose manifestations include severe hyperhomocysteinemia and decreased bone strength. The effects of smaller homocysteine elevations on bone tissue are difficult to demonstrate in clinical studies. Studies in animals and in humans suggest that homocysteine may weaken collagen crosslinks and, if present in large amounts, interfere with bone remodeling. Whether routine homocysteine assays should be performed to detect bone frailty remains unclear. In clinical practice, the focus should be on identifying patients with potential causes of homocysteine elevation (e.g., medications), who should then be given vitamin D and folic acid supplementation if needed. This approach may improve not only bone health, but also vascular and general health.
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Affiliation(s)
- Régis Levasseur
- Service de Rhumatologie et Pôle ostéo-articulaire, CHU d'Angers, Inserm U922, Faculté de Médecine d'Angers, 49933 Angers Cedex, France.
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Bozkurt N, Erdem M, Yılmaz E, Erdem A, Biri A, Kubatova A, Bozkurt M. The relationship of homocyteine, B12 and folic acid with the bone mineral density of the femur and lumbar spine in Turkish postmenopausal women. Arch Gynecol Obstet 2009; 280:381-7. [DOI: 10.1007/s00404-009-0936-0] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2008] [Accepted: 01/06/2009] [Indexed: 11/30/2022]
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Steer CD, Emmett PM, Lewis SJ, Smith GD, Tobias JH. Methylenetetrahydrofolate reductase (MTHFR) C677T polymorphism is associated with spinal BMD in 9-year-old children. J Bone Miner Res 2009; 24:117-24. [PMID: 18715139 PMCID: PMC2742728 DOI: 10.1359/jbmr.080814] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The C677T MTHFR polymorphism has been associated with lumbar spine and hip BMD. In older adults, the genetic effect has been reported in women only. However, in younger adults, this influence may only be present in men. This study is the first to investigate associations between the C677T MTHFR polymorphism and bone phenotypes in children. Regression analyses were used to study the relationship between MTHFR genotype and bone phenotypes derived from total body DXA scans in children 9.9 yr of age from the Avon Longitudinal Study of Parents and Children (ALSPAC). A total of 5816 children had both genetic and DXA data for the total body less head region (TBLH) and 3196 for the spine. A strong association was observed between the C677T MTHFR genotype and spine BMD (p < 0.001; 0.10 SD decrease per T allele). There was some evidence that this genetic effect was stronger in boys compared with girls (p = 0.04 for sex interaction). In contrast, there was no association between the C677T MTHFR genotype and TBLH BMD. The association between MTHFR genotype and spine BMD was attenuated particularly in girls by high maternal dietary intakes of vitamin B(6) and folate during pregnancy but not by child dietary intakes at 7 yr. To the extent that these findings reflect known influences of C677T MTHFR genotype on plasma homocysteine levels, our results suggest that the latter is an important regulator of spinal BMD in childhood.
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Affiliation(s)
- Colin D Steer
- Department of Community Based Medicine, University of Bristol, Bristol, United Kingdom.
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Musumeci M, Vadalà G, Tringali G, Insirello E, Roccazzello AM, Simpore J, Musumeci S. Genetic and environmental factors in human osteoporosis from Sub-Saharan to Mediterranean areas. J Bone Miner Metab 2009; 27:424-34. [PMID: 19255718 DOI: 10.1007/s00774-009-0041-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/04/2007] [Accepted: 07/31/2008] [Indexed: 01/03/2023]
Abstract
The aim of this study was to determine the prevalence of known gene polymorphisms associated with osteoporosis in postmenopausal normal women from Burkina Faso and Sicily, compared to postmenopausal Sicilian women with osteoporosis, and to establish the weight of environmental factors in the mechanism of osteoporosis. Bone mass density (BMD) was measured by phalangeal quantitative ultrasound (QUS) in Burkinabe woman and by the dual X-ray absorptiometry at the femoral neck in Sicilian women. The polymorphisms of the vitamin D receptor (VDR) gene, estrogen receptor (ESR) gene, calcitonin receptor (CTR) gene and COL1A1 collagen gene were characterized by PCR. The social characteristics of studied women were evaluated by a specific questionnaire. The observed percentages of single specific polymorphisms did not differ from that expected with exception of VDR B allele and ESR X and P allele in Burkinabe and Sicilian women, respectively. Association analyses and multivariate two-step regression model of social and molecular parameters, demonstrated that in comparison to the VDR, ESR, CTR polymorphisms, physical activities and healthy diet, associated with outdoor work are the best favourable prognostic factors for osteoporosis. A diet rich in calcium, other minerals and vitamin D in association with physical activity represents the most effective way to maintain not only a healthy bone structure but also an acceptable BMD. This is particularly true for Sub-Saharan women.
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Affiliation(s)
- Maria Musumeci
- Department of Hematology, Oncology and Molecular Medicine, National Institute of Health, Rome, Italy
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Herrmann M, Umanskaya N, Traber L, Schmidt-Gayk H, Menke W, Lanzer G, Lenhart M, Peter Schmidt J, Herrmann W. The effect of B-vitamins on biochemical bone turnover markers and bone mineral density in osteoporotic patients: a 1-year double blind placebo controlled trial. Clin Chem Lab Med 2008; 45:1785-92. [PMID: 18020969 DOI: 10.1515/cclm.2007.352] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
BACKGROUND Hyperhomocysteinemia is a new risk factor for osteoporosis. This study analyzed the effect of a homocysteine (HCY)-lowering treatment in osteoporotic individuals. METHODS Osteoporotic subjects (n=47, 55-82 years) were treated with either a combination of 2.5 mg folate, 0.5 mg vitamin B(12) and 25 mg vitamin B(6) or placebo. Bone mineral density (BMD) at lumbar spine and hip was measured at baseline and after 1 year. Urinary desoxypyridinoline cross-links (DPD) and plasma levels of tartrate resistant acid phosphatase (TRAP), C-terminal cross-links of collagen I (CTx), pro-collagen type I N-terminal peptide (PINP) and osteocalcin (OC) were measured after 0, 4, 8 and 12 months. RESULTS B-vitamin supplementation significantly reduced HCY (0 vs. 12 months: 13.6+/-4.8 vs. 8.9+/-2.4 micromol/L). Placebo treatment had no effect on HCY (0 vs. 12 months: 12.0+/-3.4 vs. 12.7+/-3.9 micromol/L). BMD, TRAP, CTx, OC and PINP did not change throughout the study in both groups. Vitamin treatment decreased urinary DPD by -13% (p<0.01) after 8 and 12 months. In a sub-group analysis of hyperhomocysteinemic subjects (HCY>15 mumol/L, n=8), B-vitamin treatment tended to increase BMD at the lumbar spine, with a t-score from -2.7 to -1.7, and to decrease OC and PINP by approximately 50%. CONCLUSIONS B-vitamin supplementation had no consistent effects on bone turnover or BMD. However, the situation may be different in patients with hyperhomocysteinemia.
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Affiliation(s)
- Markus Herrmann
- ANZAC Research Institute, University of Sydney, Sydney NSW, Australia.
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Herrmann M, Peter Schmidt J, Umanskaya N, Wagner A, Taban-Shomal O, Widmann T, Colaianni G, Wildemann B, Herrmann W. The role of hyperhomocysteinemia as well as folate, vitamin B(6) and B(12) deficiencies in osteoporosis: a systematic review. Clin Chem Lab Med 2008; 45:1621-32. [PMID: 18067447 DOI: 10.1515/cclm.2007.362] [Citation(s) in RCA: 76] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Hyperhomocysteinemia (HHCY) has been suggested as a new risk factor for osteoporosis. Recent epidemiological, clinical and experimental studies provide a growing body of data, which is reviewed in this article. Epidemiological and (randomized) clinical trials suggest that HHCY increases fracture risk, but has minor effects on bone mineral density. Measurement of biochemical bone turnover markers indicates a shift of bone metabolism towards bone resorption. Animal studies confirm these observations showing a reduced bone quality and stimulation of bone resorption in hyperhomocysteinemic animals. Homocysteine (HCY) has been found to accumulate in bone by collagen binding. Cell culture studies demonstrate that high HCY levels stimulate osteoclasts but not osteoblasts, indicating again a shift of bone metabolism towards bone resorption. Regarding B-vitamins, only a few in vivo studies with equivocal results have been published. However, two large cell culture studies confirm the results obtained with exogenous HCY administration. In addition, HHCY seems to have adverse affects on extracellular bone matrix by disturbing collagen crosslinking. In conclusion, existing data suggest that HHCY (and possibly B-vitamin deficiencies) adversely affects bone quality by a stimulation of bone resorption and disturbance of collagen crosslinking.
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Affiliation(s)
- Markus Herrmann
- ANZAC Research Institute, University of Sydney, Sydney NSW, Australia.
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Salari P, Larijani B, Abdollahi M. Association of hyperhomocysteinemia with osteoporosis: a systematic review. ACTA ACUST UNITED AC 2008. [DOI: 10.2217/14750708.5.2.215] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Guo Y, Yang TL, Pan F, Xu XH, Dong SS, Deng HW. Molecular genetic studies of gene identification for osteoporosis. Expert Rev Endocrinol Metab 2008; 3:223-267. [PMID: 30764094 DOI: 10.1586/17446651.3.2.223] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
This review comprehensively summarizes the most important and representative molecular genetics studies of gene identification for osteoporosis published up to the end of September 2007. It is intended to constitute a sequential update of our previously published reviews covering the available data up to the end of 2004. Evidence from candidate gene-association studies, genome-wide linkage and association studies, as well as functional genomic studies (including gene-expression microarray and proteomics) on osteogenesis and osteoporosis, are reviewed separately. Studies of transgenic and knockout mice models relevant to osteoporosis are summarized. The major results of all studies are tabulated for comparison and ease of reference. Comments are made on the most notable findings and representative studies for their potential influence and implications on our present understanding of genetics of osteoporosis. The format adopted by this review should be ideal for accommodating future new advances and studies.
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Affiliation(s)
- Yan Guo
- a The Key Laboratory of Biomedical Information Engineering of Ministry of Education and Institute of Molecular Genetics, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, PR China
| | - Tie-Lin Yang
- a The Key Laboratory of Biomedical Information Engineering of Ministry of Education and Institute of Molecular Genetics, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, PR China
| | - Feng Pan
- a The Key Laboratory of Biomedical Information Engineering of Ministry of Education and Institute of Molecular Genetics, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, PR China
| | - Xiang-Hong Xu
- a The Key Laboratory of Biomedical Information Engineering of Ministry of Education and Institute of Molecular Genetics, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, PR China
| | - Shan-Shan Dong
- a The Key Laboratory of Biomedical Information Engineering of Ministry of Education and Institute of Molecular Genetics, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, PR China
| | - Hong-Wen Deng
- b The Key Laboratory of Biomedical Information Engineering of Ministry of Education and Institute of Molecular Genetics, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, PR China and Departments of Orthopedic Surgery and Basic Medical Sciences, University of Missouri - Kansas City, Kansas City, MO 64108, USA.
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