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Namdar A, Salahinejad E. Advances in ion-doping of Ca-Mg silicate bioceramics for bone tissue engineering. Coord Chem Rev 2023. [DOI: 10.1016/j.ccr.2022.215001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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Barrientos-Galeana E, Tolentino-Dolores MC, Morales-Hernández RM, Sámano R, Chico-Barba G, Fernández-Sánchez E, Zamora-Sánchez LJ, Alonso-López AD, López-Martínez H, Alba-Rosales T, Sánchez-Guerrero SA. Bone Turnover Markers Changes Induced by Plateletpheresis May Be Minimized with Oral Supplementation of Calcium, Minerals, and Vitamin D before the Procedures: A Non-Randomized, Controlled Study. J Clin Med 2022; 12:jcm12010281. [PMID: 36615081 PMCID: PMC9821577 DOI: 10.3390/jcm12010281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 12/14/2022] [Accepted: 12/20/2022] [Indexed: 12/31/2022] Open
Abstract
Apheresis allows the collection of specific blood components but changes serum calcium (Ca), magnesium (Mg), copper (Cu), zinc (Zn), and hormones involved in bone metabolism due to citrate infusion. We assessed the effect of oral supplementation of calcium, vitamin D, and minerals as pills or an enriched diet before plateletpheresis donation on levels of divalent cations, hormones, and bone turnover markers that may prevent metabolic changes. Methods: Non-randomized controlled study including 134 donors. Serum parathyroid hormone (PTH), Ca, Mg, Zn, Cu, osteocalcin (OC), vitamin D, and type-1 collagen C-terminal telopeptide (CTX-1) levels were measured at baseline and post-procedure. Donors were divided into four groups: supplemented with calcium carbonate and vitamin D (cal + vitd); those receiving calcium, minerals, and vitamin D (cal + vitd + min); those receiving a calcium-rich diet (diet) and a control group (control). Results: PTH levels increased >1-fold, whereas tCa, tMg, Zn, Cu, iCa, iMg, and vitamin D levels decreased immediately after apheresis amongst donors of any group; when these levels were measured two weeks later, donors in the calcium-vitd and cal + vitd + min groups returned to basal values; donors in the cal + vitd + min group were the only group that kept their levels of OC and CTX unchanged at the different study times. Conclusions: Bone turnover markers changes induced by plateletpheresis may be minimized with oral supplementation of calcium, minerals, and vitamin D two days before the procedures.
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Affiliation(s)
- Edgar Barrientos-Galeana
- Nutrition and Bioprogramming Coordination, Instituto Nacional de Perinatología, Mexico City 11000, Mexico
- Blood Bank Department, Instituto Nacional de Cancerología, Mexico City 14080, Mexico
- Correspondence: (E.B.-G.); (S.A.S.-G.)
| | | | | | - Reyna Sámano
- Nutrition and Bioprogramming Coordination, Instituto Nacional de Perinatología, Mexico City 11000, Mexico
| | - Gabriela Chico-Barba
- Nutrition and Bioprogramming Coordination, Instituto Nacional de Perinatología, Mexico City 11000, Mexico
| | | | | | | | | | - Tania Alba-Rosales
- Blood Bank Department, Instituto Nacional de Cancerología, Mexico City 14080, Mexico
| | - Sergio Arturo Sánchez-Guerrero
- Blood Bank Department, Instituto Nacional de Cancerología, Mexico City 14080, Mexico
- Correspondence: (E.B.-G.); (S.A.S.-G.)
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Miazgowski T, Rył A, Szylińska A, Rotter I. The Impact of Major and Trace Elements in Serum and Bone on Dual-Energy X-Ray Absorptiometry-Derived Hip Strength. Calcif Tissue Int 2022; 110:674-684. [PMID: 35072733 PMCID: PMC9108102 DOI: 10.1007/s00223-022-00945-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Accepted: 01/05/2022] [Indexed: 11/17/2022]
Abstract
The purpose of this study was to establish associations between both serum levels and bone content of a wide range of elements (Na, K, P, Ca, Mg, Zn, Cu, Cr, Mn, Fe, and Pb), with hip strength (HS) indices derived from dual-energy X-ray absorptiometry (DXA). The study population consisted of a number of male patients aged 56-77 years following hip replacement due to osteoarthritis of the hip. Bone specimens were taken from the femoral head and neck during arthroplasty. The elemental analyses were carried out using coupled plasma optical emission spectrometry. The following DXA-HS parameters were assessed: buckling ratio (BR), cross-sectional area (CSA) and its moment of inertia (CSMI), section modulus, and Femoral Strength Index (FSI). Age was positively correlated with Na, K, and Cu in the bone. Ca in the bone was positively associated with BR and negatively with SM and CSMI. Of all the DXA-HS parameters, the weakest associations of elements in the bone were found with FSI and the strongest with BR. Among the elements in the serum, the strongest negative associations were found for K, Cr, Mn, and Zn with CSA, while the majority of bone elements were associated either positively (Ca, P, Mg, Zn, and Cu) or negatively (Mn, Fe, Pb, and Cr) with BR. In conclusion, the interactions between individual elements in blood serum and bone with DXA-HS could not be unequivocally established.
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Affiliation(s)
- Tomasz Miazgowski
- Department of Propedeutics of Internal Medicine and Arterial Hypertension, Pomeranian Medical University in Szczecin, Szczecin, Poland
| | - Aleksandra Rył
- Department of Medical Rehabilitation and Clinical Physiotherapy, Pomeranian Medical University in Szczecin, Szczecin, Poland.
| | - Aleksandra Szylińska
- Department of Medical Rehabilitation and Clinical Physiotherapy, Pomeranian Medical University in Szczecin, Szczecin, Poland
| | - Iwona Rotter
- Department of Medical Rehabilitation and Clinical Physiotherapy, Pomeranian Medical University in Szczecin, Szczecin, Poland
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Wang WJ, Huang MN, Wang CK, Yang AM, Lin CY. Zinc status is independently related to the bone mineral density, fracture risk assessment tool result, and bone fracture history: Results from a U.S. nationally representative survey. J Trace Elem Med Biol 2021; 67:126765. [PMID: 33933911 DOI: 10.1016/j.jtemb.2021.126765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Revised: 04/20/2021] [Accepted: 04/22/2021] [Indexed: 10/21/2022]
Abstract
PURPOSE Previous reports have identified the important role of zinc in bone health. Although the risk of zinc deficiency is still a concern in the U.S., there has never been an in-depth study of the association between zinc status and bone health in a sample representing the country. METHODS We included 2,895 subjects (aged ≥ 40 years) from National Health and Nutrition Examination Survey (NHANES) 2013-2014 to explore the relationship among three biomarkers of zinc (serum, food, and total intake), the bone mineral density (BMD) of the total spine and femur, the FRAX® scores, and the previous history of bone fractures. RESULTS We showed a one-unit increase in the ln-serum zinc level was associated with an increase in the total spine BMD (ß = 0.068; S.E. = 0.028; P = 0.030) and total femur BMD (ß = 0.061; S.E. = 0.017; P = 0.003), while a one-unit increase in the ln-food zinc intake amount was correlated with an increase in the total femur BMD in the participants (ß = 0.023; S.E. = 0.009; P = 0.021). The ln-total zinc intake amount was correlated with an increase in the total femur BMD in women (ß = 0.016; S.E. = 0.007; P = 0.041). We also found food zinc intake was negatively correlated with the FRAX® score, while increased levels of all three zinc biomarkers were associated with a decreased incidence of previous bone fractures. CONCLUSIONS In this representative survey of American adults above 40 years old, higher zinc status was associated with higher total spine and femoral BMD, lower FRAX® scores, and lower incidence of previous fractures. If this finding is causal, increased zinc intake remains an important issue for Americans.
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Affiliation(s)
- Wei-Jie Wang
- Division of Nephrology, Department of Internal Medicine, Taoyuan General Hospital, Ministry of Health and Welfare, Taoyuan, 300, Taiwan; Department of Biomedical Engineering, Chung Yuan Christian University, Taoyuan, 300, Taiwan
| | - Ming-Nan Huang
- Department of Emergency Medicine, En Chu Kong Hospital, New Taipei City, 237, Taiwan
| | - Chi-Kang Wang
- Department of Environmental Engineering and Health, Yuanpei University of Medical Technology, Hsinchu, 300, Taiwan
| | - An-Ming Yang
- Department of Internal Medicine, En Chu Kong Hospital, New Taipei City, 237, Taiwan; Department of Nursing, Yuanpei University of Medical Technology, Hsinchu, 300, Taiwan
| | - Chien-Yu Lin
- Department of Environmental Engineering and Health, Yuanpei University of Medical Technology, Hsinchu, 300, Taiwan; Department of Internal Medicine, En Chu Kong Hospital, New Taipei City, 237, Taiwan; School of Medicine, Fu Jen Catholic University, New Taipei City, 242, Taiwan.
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Rył A, Miazgowski T, Szylińska A, Turoń-Skrzypińska A, Jurewicz A, Bohatyrewicz A, Rotter I. Bone Health in Aging Men: Does Zinc and Cuprum Level Matter? Biomolecules 2021; 11:biom11020237. [PMID: 33567585 PMCID: PMC7915903 DOI: 10.3390/biom11020237] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 01/31/2021] [Accepted: 02/01/2021] [Indexed: 01/10/2023] Open
Abstract
The aim of this study was to assess the associations of serum and bone zinc (Zn) and cuprum (Cu) with bone mineral density (BMD) and content (BMC), markers of bone turnover, and sex hormones. The study group comprised 144 men treated with total hip replacement due to hip osteoarthritis. We measured total, free, and bioavailable testosterone, estradiol, and sex-hormone-binding globulin (sex hormones), as well as parathyroid hormone, osteocalcin, carboxy terminal collagen crosslinks, and N-terminal propeptide of type I procollagen (markers of bone turnover). Total body BMD, BMC, total and visceral fat, and appendicular skeletal mass (ASM) were measured using dual-energy X-ray absorptiometry. ASM index, and total and visceral fat were positively correlated with BMD. Bone Zn correlated neither with sex hormones nor with bone turnover markers; however, it was positively associated both with BMD and with BMC, while bone Cu (as opposed to serum Cu) was not. In multiple regression, the ASM index, Zn/Cu ratio (in both the serum and the bone), and serum Cu concentration were significantly associated with BMD and BMC after adjustment for age and body mass index (BMI). Our results suggest that the Zn/Cu ratio in both the serum and the bone may exert a significant positive effect on total BMD and BMC.
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Affiliation(s)
- Aleksandra Rył
- Department of Medical Rehabilitation and Clinical Physiotherapy, Pomeranian Medical University, 71-210 Szczecin, Poland; (A.S.); (A.T.-S.); (I.R.)
- Correspondence:
| | - Tomasz Miazgowski
- Department of Propedeutics of Internal Diseases and Arterial Hypertension, Pomeranian Medical University, 71-252 Szczecin, Poland;
| | - Aleksandra Szylińska
- Department of Medical Rehabilitation and Clinical Physiotherapy, Pomeranian Medical University, 71-210 Szczecin, Poland; (A.S.); (A.T.-S.); (I.R.)
| | - Agnieszka Turoń-Skrzypińska
- Department of Medical Rehabilitation and Clinical Physiotherapy, Pomeranian Medical University, 71-210 Szczecin, Poland; (A.S.); (A.T.-S.); (I.R.)
| | - Alina Jurewicz
- Department of Orthopedics, Traumatology and Orthopedic Oncology, Pomeranian Medical University, 71-252 Szczecin, Poland; (A.J.); (A.B.)
| | - Andrzej Bohatyrewicz
- Department of Orthopedics, Traumatology and Orthopedic Oncology, Pomeranian Medical University, 71-252 Szczecin, Poland; (A.J.); (A.B.)
| | - Iwona Rotter
- Department of Medical Rehabilitation and Clinical Physiotherapy, Pomeranian Medical University, 71-210 Szczecin, Poland; (A.S.); (A.T.-S.); (I.R.)
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Skrajnowska D, Jagielska A, Ruszczyńska A, Wagner B, Bielecki W, Bobrowska-Korczak B. Title Changes in the Mineral Composition of Rat Femoral Bones Induced by Implantation of LNCaP Prostate Cancer Cells and Dietary Supplementation. Nutrients 2020; 13:E100. [PMID: 33396969 PMCID: PMC7823861 DOI: 10.3390/nu13010100] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Revised: 12/26/2020] [Accepted: 12/27/2020] [Indexed: 11/16/2022] Open
Abstract
Prostate cancer (PCa) is the second most frequent cancer in men and the fifth most common cause of death worldwide, with an estimated 378,553 deaths in 2020. Prostate cancer shows a strong tendency to form metastatic foci in the bones. A number of interactions between cancer cells attacking bones and cells of the bone matrix lead to destruction of the bone and growth of the tumour. The last few decades have seen increased interest in the precise role of minerals in human health and disease. Tumour cells accumulate various minerals that promote their intensive growth. Bone, as a storehouse of elements, can be a valuable source of them for the growing tumour. There are also reports suggesting that the presence of some tumours, e.g., of the breast, can adversely affect bone structure even in the absence of metastasis to this organ. This paper presents the effect of chronic dietary intake of calcium, iron and zinc, administered in doses corresponding maximally to twice their level in a standard diet, on homeostasis of selected elements (Ca, K, Zn, Fe, Cu, Sr, Ni, Co, Mn and Mo) in the femoral bones of healthy rats and rats with implanted cancer cells of the LNCaP line. The experiment was conducted over 90 days. After the adaptation period, the animals were randomly divided into four dietary groups: standard diet and supplementation with Zn, Fe and Ca. Every dietary group was divided into experimental group (with implanted cancer cells) and control group (without implanted cancer cells). The cancer cells (LnCaP) were implanted intraperitoneally in the amount 1 × 106 to the rats at day 90 of their lifetime. Bone tissue was dried and treated with microwave-assisted mineral digestation. Total elemental content was quantified by ICP-MS. Student's t-test and Anova or Kruskal-Wallis tests were applied in order to compare treatment and dietary groups. In the case of most of the diets, especially the standard diet, the femoral bones of rats with implanted LNCaP cells showed a clear downward trend in the content of the elements tested, which may be indicative of slow osteolysis taking place in the bone tissue. In the group of rats receiving the standard diet, there were significant reductions in the content of Mo (by 83%), Ca (25%), Co (22%), Mn (13%), K (13%) and Sr (9%) in the bone tissue of rats with implanted LNCaP cells in comparison with the control group receiving the same diet but without LNCaP implantation. Supplementation of the rat diet with calcium, zinc and iron decreased the frequency of these changes relative to the standard diet, which may indicate that the diet had an inhibitory effect on bone resorption in conditions of LNCaP implantation. The principal component analysis (PCA) score plot confirms the pronounced effect of implanted LNCaP cells and the standard diet on bone composition. At the same time, supplementation with calcium, zinc and iron seems to improve bone composition. The microelements that most often underwent quantitative changes in the experimental conditions were cobalt, manganese and molybdenum.
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Affiliation(s)
- Dorota Skrajnowska
- Faculty of Pharmacy with the Laboratory Medicine Division, Department of Bromatology, Medical University of Warsaw, Banacha 1, 02-097 Warsaw, Poland;
| | - Agata Jagielska
- Biological and Chemical Research Centre, Faculty of Chemistry, University of Warsaw, Zwirki i Wigury 101, 02-089 Warsaw, Poland; (A.J.); (A.R.); (B.W.)
| | - Anna Ruszczyńska
- Biological and Chemical Research Centre, Faculty of Chemistry, University of Warsaw, Zwirki i Wigury 101, 02-089 Warsaw, Poland; (A.J.); (A.R.); (B.W.)
| | - Barbara Wagner
- Biological and Chemical Research Centre, Faculty of Chemistry, University of Warsaw, Zwirki i Wigury 101, 02-089 Warsaw, Poland; (A.J.); (A.R.); (B.W.)
| | - Wojciech Bielecki
- Department of Pathology and Veterinary Diagnostics, Faculty of Veterinary Medicine, Warsaw University of Live Sciences, Nowoursynowska 159c, 02-787 Warsaw, Poland;
| | - Barbara Bobrowska-Korczak
- Faculty of Pharmacy with the Laboratory Medicine Division, Department of Bromatology, Medical University of Warsaw, Banacha 1, 02-097 Warsaw, Poland;
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Chang J, Yu D, Ji J, Wang N, Yu S, Yu B. The Association Between the Concentration of Serum Magnesium and Postmenopausal Osteoporosis. Front Med (Lausanne) 2020; 7:381. [PMID: 32850896 PMCID: PMC7417435 DOI: 10.3389/fmed.2020.00381] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Accepted: 06/19/2020] [Indexed: 12/30/2022] Open
Abstract
Background: Osteoporosis is the most common and widespread chronic skeletal metabolic disease in the world and can lead to catastrophic fractures. Therefore, it is important to look for factors that can be modified or controlled to prevent osteoporosis. Although serum Mg is believed to be associated with osteoporosis in many individuals, there are conflicting reports on the association between serum Mg and osteoporosis. Therefore, this meta-analyses aimed to explore the association between the concentration of serum Mg and osteoporosis as well as that between the concentration of serum Mg and osteopenia. Methods: Articles were searched in PubMed. We also reviewed the reference lists of the relevant publications and reviews as of December 2019. Finally, 11 eligible studies involving 2,776 postmenopausal women were selected. We performed subgroup analysis, and publication bias was assessed. Results: According to the forest plot analysis, postmenopausal women with osteoporosis had a lower concentration of serum Mg than normal controls [standardized mean difference (SMD) = −0.56, 95% confidence interval (CI) = −1.02 to −0.09]. However, this result was not applicable to those with osteopenia (SMD = −0.30, 95% CI = −0.69 to 0.09). The subgroup analysis by geographical location found a similar pattern in European postmenopausal women with osteoporosis (SMD = −0.73, 95% CI = −1.322 to −0.143), but not in Asian (SMD = −0.007, 95% CI = −0.381 to 0.394). The subgroup analysis by site of bone mineral density (BMD) showed the serum Mg concentration of postmenopausal women with osteoporosis (BMD of femur) was lower than in healthy controls (SMD = −0.44, 95% CI = −0.77 to −0.12), and BMD of the spine group had the same conclusion (SMD = −0.78, 95% CI = −1.36 to −0.19). Besides, the serum Mg concentration of postmenopausal women with osteoporosis was lower than that of the normal bone mass group in the studies those included more than 50 postmenopausal women with osteoporosis (SMD = −0.57, 95% CI = −1.04 to −0.11). We also found postmenopausal women under the age of 60 with osteoporosis had a lower concentration of serum Mg than the healthy controls (SMD = −0.61, 95% CI = −1.09 to −0.13). Conclusion: Postmenopausal women with osteoporosis have a lower concentration of serum Mg. However, the association between the concentration of serum Mg and osteopenia needs further confirmation.
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Affiliation(s)
- Jinlei Chang
- The First Clinical Medical College, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Degang Yu
- Department of Orthopaedics, Shanghai Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Jindou Ji
- The First Clinical Medical College, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Ning Wang
- The College of Traditional Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Shengwen Yu
- The College of Traditional Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Bo Yu
- Department of Orthopaedics, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, China
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de Quadros VP, Tobar N, Viana LR, Dos Santos RW, Kiyataka PHM, Gomes-Marcondes MCC. The 17β-oestradiol treatment minimizes the adverse effects of protein restriction on bone parameters in ovariectomized Wistar rats: Relevance to osteoporosis and the menopause. Bone Joint Res 2020; 8:573-581. [PMID: 31934328 PMCID: PMC6946913 DOI: 10.1302/2046-3758.812.bjr-2018-0259.r2] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Objectives Insufficient protein ingestion may affect muscle and bone mass, increasing the risk of osteoporotic fractures in the elderly, and especially in postmenopausal women. We evaluated how a low-protein diet affects bone parameters under gonadal hormone deficiency and the improvement led by hormone replacement therapy (HRT) with 17β-oestradiol. Methods Female Wistar rats were divided into control (C), ovariectomized (OVX), and 17β-oestradiol-treated ovariectomized (OVX-HRT) groups, which were fed a control or an isocaloric low-protein diet (LP; 6.6% protein; seven animals per group). Morphometric, serum, and body composition parameters were assessed, as well as bone parameters, mechanical resistance, and mineralogy. Results The results showed that protein restriction negatively affected body chemical composition and bone metabolism by the sex hormone deficiency condition in the OVX group. The association between undernutrition and hormone deficiency led to bone and muscle mass loss and increased the fragility of the bone (as well as decreasing relative femoral weight, bone mineral density, femoral elasticity, peak stress, and stress at offset yield). Although protein restriction induced more severe adverse effects compared with the controls, the combination with HRT showed an improvement in minimizing these damaging effects, as it was seen that HRT had some efficacy in maintaining muscle and bone mass, preserving the bone resistance and minimizing some deleterious processes during the menopause. Conclusion Protein restriction has adverse effects on metabolism, leading to more severe menopausal symptoms, and HRT could minimize these effects. Therefore, special attention should be given to a balanced diet during menopause and HRT.Cite this article: Bone Joint Res 2019;8:573-581.
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Affiliation(s)
- Victoria P de Quadros
- Laboratory of Nutrition and Cancer, Department of Structural and Functional Biology, Biology Institute, University of Campinas (UNICAMP), Campinas, Brazil
| | - Natalia Tobar
- Nuclear Medicine Service, the Clinical Hospital of UNICAMP, Campinas, Brazil
| | - Lais R Viana
- Laboratory of Nutrition and Cancer, Department of Structural and Functional Biology, Biology Institute, University of Campinas (UNICAMP), Campinas, Brazil
| | - Rogerio W Dos Santos
- Laboratory of Nutrition and Cancer, Department of Structural and Functional Biology, Biology Institute, University of Campinas (UNICAMP), Campinas, Brazil
| | - Paulo H M Kiyataka
- Packaging Technology Centre (Cetea) from the Institute of Food Technology (ITAL) of Campinas, Campinas, Brazil
| | - Maria C C Gomes-Marcondes
- Laboratory of Nutrition and Cancer, Department of Structural and Functional Biology, Biology Institute, University of Campinas (UNICAMP), Campinas, Brazil
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Müller WEG, Schepler H, Tolba E, Wang S, Ackermann M, Muñoz-Espí R, Xiao S, Tan R, She Z, Neufurth M, Schröder HC, Wang X. A physiologically active interpenetrating collagen network that supports growth and migration of epidermal keratinocytes: zinc-polyP nanoparticles integrated into compressed collagen. J Mater Chem B 2020; 8:5892-5902. [DOI: 10.1039/d0tb01240h] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
It is demonstrated that polyphosphate, as a component in wound healing mats together with Zn2+, is essential for growth and migration of skin keratinocytes.
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10
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Amin N, Clark CCT, Taghizadeh M, Djafarnejad S. Zinc supplements and bone health: The role of the RANKL-RANK axis as a therapeutic target. J Trace Elem Med Biol 2020; 57:126417. [PMID: 31653549 DOI: 10.1016/j.jtemb.2019.126417] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Revised: 09/20/2019] [Accepted: 10/05/2019] [Indexed: 01/19/2023]
Abstract
BACKGROUND To this day, empirical data suggests that zinc has important roles in matrix synthesis, bone turnover, and mineralization and its beneficial effects on bone could be mediated through different mechanisms. The influence of zinc on bone turnover could be facilitated via regulating RANKL/RANK/OPG pathway in bone tissue. Therefore, the aim of the study was to conduct a review to investigate the possible effect of the zinc mediated bone remodeling via RANKL/RANK/OPG pathway. METHODS A comprehensive systematic search was performed in MEDLINE/PubMed, Cochrane Library, SCOPUS, and Google Scholar to explore the studies investigating the effect of zinc as a bone remodeling factor via RANKL/RANK/OPG pathway regulation. Subsequently, the details of the pathway and the impact of zinc supplements on RANKL/RANK/OPG pathway regulation were discussed. RESULTS The pathway could play an important role in bone remodeling and any imbalance between RANKL/RANK/OPG components could lead to extreme bone resorption. Although the outcomes of some studies are equivocal, it is evident that zinc possesses protective properties against bone loss by regulating the RANKL/RANK/OPG pathway. There are several experiments where zinc supplementation resulted in upregulation of OPG expression or decreases RANKL level. However, the results of some studies oppose this. CONCLUSION It is likely that sufficient zinc intake will elicit positive effects on bone health by RANKL/RANK/OPG regulation. Although the outcomes of a few studies are equivocal, it seems that zinc can exert the protective properties against bone loss by suppressing osteoclastogenesis via downregulation of RANKL/RANK. Additionally, there are several experiments where zinc supplementation resulted in upregulation of OPG expression. However, the results of limited studies oppose this. Therefore, aside from the positive role zinc possesses in preserving bone mass, further effects of zinc in RANKL/RANK/OPG system requires further animal/human studies.
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Affiliation(s)
- Negin Amin
- Research Center for Biochemistry and Nutrition in Metabolic Diseases, Kashan University of Medical Sciences, Kashan, Iran
| | - Cain C T Clark
- Centre for Sport, Exercise, and Life Sciences, Coventry University, Coventry, United Kingdom
| | - Mohsen Taghizadeh
- Research Center for Biochemistry and Nutrition in Metabolic Diseases, Kashan University of Medical Sciences, Kashan, Iran
| | - Sadegh Djafarnejad
- Research Center for Biochemistry and Nutrition in Metabolic Diseases, Kashan University of Medical Sciences, Kashan, Iran.
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Serum copper levels are associated with bone mineral density and total fracture. J Orthop Translat 2018; 14:34-44. [PMID: 30035031 PMCID: PMC6034109 DOI: 10.1016/j.jot.2018.05.001] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Revised: 05/07/2018] [Accepted: 05/08/2018] [Indexed: 12/30/2022] Open
Abstract
Background Both copper deficiency and overexposure have been associated with adverse health effects. Evidence linking copper to bone mineral density (BMD) and total fracture, however, is limited. Methods This nationally representative cross-sectional study enrolled participants from the National Health and Nutrition Examination Survey (2011–2014) in the United States. Using unadjusted and multivariate adjusted logistic regression analyses and a two-piecewise linear regression model with a smoothing function, we evaluated the associations between serum copper levels, bone mineral density and total fracture in 722 participants. Results The study sample (n = 722, mean age: 56.47 ± 11.55 y) represented a population of which 47.2% were men; 43.91% were non-Hispanic white, 18.84% non-Hispanic black and 13.71% Mexican American; 25.9% had total fracture. In the multivariate logistic regression analysis, individuals in the lowest category (<98.5 μg/dL) of serum copper concentration had 0.049 g/cm2 lower total femur BMD and 0.045 g/cm2 lower femoral neck BMD than those in the second concentration category (98.5–114 μg/dL). Individuals in the highest category (≥134 μg/dL) of serum copper concentration had an approximately 4-fold increase in the risk of total fracture than those in the second concentration category. There were no significant associations between per 10 μg/dL increases in serum copper levels and total fracture in multivariate logistic regression analysis after multivariate adjustment (all p > 0.05). However, a differential association between serum copper levels and total fractures between men and women was observed (odds ratio = 1.81, 95% confidence interval 1.08–3.03, p = 0.026 for men and odds ratio = 1.07, 95% confidence interval 0.86–1.32, p = 0.552 for women). Conclusion Moderate serum copper levels are critically important for bone health. Lower serum copper levels are significantly associated with decreased BMD in the total femur and femoral neck. Higher serum copper levels are significantly associated with increased total fracture, especially in men. The Translational Potential of this Article The impact of serum copper concentrations on bone mineral density and total fracture can provide insights into clinical application of copper-containing supplements and biomaterials.
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Key Words
- Bone mineral density
- Bone mineral density, BMD
- Centers for Disease Control and Prevention, CDC
- Confidence interval, CI
- Diastolic blood pressure, DBP
- Dual-energy x-ray absorptiometry, DXA
- Fracture
- High-density lipoprotein-cholesterol, HDL-C
- Low-density lipoprotein-cholesterol, LDL-C
- National Center for Health Statistics, NCHS
- National Health and Nutrition Examination Survey, NHANES
- Odds ratio
- Serum copper levels
- Standard deviation, SD
- Systolic blood pressure, SBP
- Total cholesterol, TC
- Triglycerides, TG
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12
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Aljewicz M, Tonska E, Juskiewicz J, Cichosz G. The influence of product acidity and beta-glucans isolated from various sources on the mineral composition and the mechanical and microstructural properties of the femur in growing Wistar rats. J Funct Foods 2018. [DOI: 10.1016/j.jff.2018.02.035] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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13
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Velasco E, Wang S, Sanet M, Fernández-Vázquez J, Jové D, Glaría E, Valledor AF, O'Halloran TV, Balsalobre C. A new role for Zinc limitation in bacterial pathogenicity: modulation of α-hemolysin from uropathogenic Escherichia coli. Sci Rep 2018; 8:6535. [PMID: 29695842 PMCID: PMC5916954 DOI: 10.1038/s41598-018-24964-1] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2017] [Accepted: 04/09/2018] [Indexed: 11/30/2022] Open
Abstract
Metal limitation is a common situation during infection and can have profound effects on the pathogen’s success. In this report, we examine the role of zinc limitation in the expression of a virulence factor in uropathogenic Escherichia coli. The pyelonephritis isolate J96 carries two hlyCABD operons that encode the RTX toxin α-hemolysin. While the coding regions of both operons are largely conserved, the upstream sequences, including the promoters, are unrelated. We show here that the two hlyCABD operons are differently regulated. The hlyII operon is efficiently silenced in the presence of zinc and highly expressed when zinc is limited. In contrast, the hlyI operon does not respond to zinc limitation. Genetic studies reveal that zinc-responsive regulation of the hlyII operon is controlled by the Zur metalloregulatory protein. A Zur binding site was identified in the promoter sequence of the hlyII operon, and we observe direct binding of Zur to this promoter region. Moreover, we find that Zur regulation of the hlyII operon modulates the ability of E. coli J96 to induce a cytotoxic response in host cell lines in culture. Our report constitutes the first description of the involvement of the zinc-sensing protein Zur in directly modulating the expression of a virulence factor in bacteria.
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Affiliation(s)
- Elsa Velasco
- Department of Genetics, Microbiology and Statistics, School of Biology, Universitat de Barcelona, Avda. Diagonal 643, Barcelona, 08028, Spain
| | - Suning Wang
- Chemistry of Life Process Institute, and Department of Chemistry, Northwestern University, Evanston, Illinois, 60208-3113, United States of America
| | - Marianna Sanet
- Department of Genetics, Microbiology and Statistics, School of Biology, Universitat de Barcelona, Avda. Diagonal 643, Barcelona, 08028, Spain
| | - Jorge Fernández-Vázquez
- Department of Genetics, Microbiology and Statistics, School of Biology, Universitat de Barcelona, Avda. Diagonal 643, Barcelona, 08028, Spain
| | - Daniel Jové
- Department of Genetics, Microbiology and Statistics, School of Biology, Universitat de Barcelona, Avda. Diagonal 643, Barcelona, 08028, Spain
| | - Estibaliz Glaría
- Nuclear Receptor Group, Department of Cell Biology, Physiology and Immunology, School of Biology, Universitat de Barcelona, Avda. Diagonal 643, Barcelona, 08028, Spain
| | - Annabel F Valledor
- Nuclear Receptor Group, Department of Cell Biology, Physiology and Immunology, School of Biology, Universitat de Barcelona, Avda. Diagonal 643, Barcelona, 08028, Spain
| | - Thomas V O'Halloran
- Chemistry of Life Process Institute, and Department of Chemistry, Northwestern University, Evanston, Illinois, 60208-3113, United States of America
| | - Carlos Balsalobre
- Department of Genetics, Microbiology and Statistics, School of Biology, Universitat de Barcelona, Avda. Diagonal 643, Barcelona, 08028, Spain.
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14
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Saeedi P, Shavandi A, Meredith-Jones K. Nail Properties and Bone Health: A Review. J Funct Biomater 2018; 9:jfb9020031. [PMID: 29690604 PMCID: PMC6023356 DOI: 10.3390/jfb9020031] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2018] [Revised: 04/05/2018] [Accepted: 04/17/2018] [Indexed: 11/16/2022] Open
Abstract
Physicochemical properties of nail may offer valuable insight into the health of bone. Currently, dual-energy X-ray absorptiometry (DXA) is the gold standard technique for evaluating bone health through bone mineral density (BMD). However, only 70% of fractures are explained by low BMD according to DXA. Therefore, the World Health Organisation recommended the need for the development of alternative methods of assessing bone health. Keratin and collagen type I are major proteins in nail and bone, respectively. Both of these proteins undergo post-translational modifications, with a possible correlation between the degree of post-translational modifications in keratin and collagen. Raman spectroscopy is a technique used to detect changes in protein composition and structure. As changes in protein function and structure may be associated with the development of osteoporosis, Raman spectroscopy may be a valuable adjunct to assess bone health and fracture risk. This review critically evaluates various methods and techniques to identify the link between nail properties and bone health. The strengths and limitations of various studies and the potential use of nail protein and minerals to evaluate bone health have been also presented.
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Affiliation(s)
- Pouya Saeedi
- Department of Human Nutrition, University of Otago, Dunedin 9054, New Zealand.
| | - Amin Shavandi
- Department of Food Science, University of Otago, Dunedin 9054, New Zealand.
- Centre for Bioengineering & Nanomedicine, University of Otago, Dunedin 9054, New Zealand.
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15
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Borowska S, Brzóska MM, Gałażyn-Sidorczuk M, Rogalska J. Effect of an Extract from Aronia melanocarpa L. Berries on the Body Status of Zinc and Copper under Chronic Exposure to Cadmium: An In Vivo Experimental Study. Nutrients 2017; 9:E1374. [PMID: 29257101 PMCID: PMC5748824 DOI: 10.3390/nu9121374] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2017] [Revised: 11/14/2017] [Accepted: 12/12/2017] [Indexed: 12/21/2022] Open
Abstract
In an experimental model of low-level and moderate environmental human exposure to cadmium (Cd), it was investigated whether the consumption of a polyphenol-rich Aronia melanocarpa L. berries (chokeberries) extract (AE) may influence the body status of zinc (Zn) and copper (Cu). The bioelements' apparent absorption, body retention, serum and tissue concentrations, total pool in internal organs, excretion, and the degree of binding to metallothionein were evaluated in female rats administered 0.1% aqueous AE or/and Cd in their diet (1 and 5 mg/kg) for 3-24 months. The consumption of AE alone had no influence on the body status of Zn and Cu. The extract administration at both levels of Cd treatment significantly (completely or partially) protected against most of the changes in the metabolism of Zn and Cu caused by this xenobiotic; however, it increased or decreased some of the Cd-unchanged indices of their body status. Based on the findings, it seems that rational amounts of chokeberry products may be included in the daily diet without the risk of destroying Zn and Cu metabolisms; however, their potential prophylactic use under exposure to Cd needs further study to exclude any unfavourable impact of these essential elements on the metabolism.
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Affiliation(s)
- Sylwia Borowska
- Department of Toxicology, Medical University of Bialystok, Adama Mickiewicza 2C Street, 15-222 Bialystok, Poland.
| | - Małgorzata M Brzóska
- Department of Toxicology, Medical University of Bialystok, Adama Mickiewicza 2C Street, 15-222 Bialystok, Poland.
| | - Małgorzata Gałażyn-Sidorczuk
- Department of Toxicology, Medical University of Bialystok, Adama Mickiewicza 2C Street, 15-222 Bialystok, Poland.
| | - Joanna Rogalska
- Department of Toxicology, Medical University of Bialystok, Adama Mickiewicza 2C Street, 15-222 Bialystok, Poland.
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16
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Lee S, Barin G, Ackerman CM, Muchenditsi A, Xu J, Reimer JA, Lutsenko S, Long JR, Chang CJ. Copper Capture in a Thioether-Functionalized Porous Polymer Applied to the Detection of Wilson's Disease. J Am Chem Soc 2016; 138:7603-9. [PMID: 27285482 PMCID: PMC5555401 DOI: 10.1021/jacs.6b02515] [Citation(s) in RCA: 83] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
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Copper is an essential
nutrient for life, but at the same time,
hyperaccumulation of this redox-active metal in biological fluids
and tissues is a hallmark of pathologies such as Wilson’s and
Menkes diseases, various neurodegenerative diseases, and toxic environmental
exposure. Diseases characterized by copper hyperaccumulation are currently
challenging to identify due to costly diagnostic tools that involve
extensive technical workup. Motivated to create simple yet highly
selective and sensitive diagnostic tools, we have initiated a program
to develop new materials that can enable monitoring of copper levels
in biological fluid samples without complex and expensive instrumentation.
Herein, we report the design, synthesis, and properties of PAF-1-SMe,
a robust three-dimensional porous aromatic framework (PAF) densely
functionalized with thioether groups for selective capture and concentration
of copper from biofluids as well as aqueous samples. PAF-1-SMe exhibits
a high selectivity for copper over other biologically relevant metals,
with a saturation capacity reaching over 600 mg/g. Moreover, the combination
of PAF-1-SMe as a material for capture and concentration of copper
from biological samples with 8-hydroxyquinoline as a colorimetric
indicator affords a method for identifying aberrant elevations of
copper in urine samples from mice with Wilson’s disease and
also tracing exogenously added copper in serum. This divide-and-conquer
sensing strategy, where functional and robust porous materials serve
as molecular recognition elements that can be used to capture and
concentrate analytes in conjunction with molecular indicators for
signal readouts, establishes a valuable starting point for the use
of porous polymeric materials in noninvasive diagnostic applications.
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Affiliation(s)
| | | | | | - Abigael Muchenditsi
- Department of Physiology, Johns Hopkins University, School of Medicine , Baltimore, Maryland 21205, United States
| | | | | | - Svetlana Lutsenko
- Department of Physiology, Johns Hopkins University, School of Medicine , Baltimore, Maryland 21205, United States
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17
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Farsinejad-Marj M, Saneei P, Esmaillzadeh A. Dietary magnesium intake, bone mineral density and risk of fracture: a systematic review and meta-analysis. Osteoporos Int 2016; 27:1389-1399. [PMID: 26556742 DOI: 10.1007/s00198-015-3400-y] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2015] [Accepted: 11/03/2015] [Indexed: 01/14/2023]
Abstract
Dietary magnesium intake has been related to osteoporosis and risk of fractures in earlier studies; however, findings were conflicting. This meta-analysis indicated that high magnesium intake was not associated with increased risk of fracture; however, a positive marginally significant correlation was found between magnesium intake and bone mineral density (BMD) in total hip as well as in femoral neck. Although there is some evidence on the association between magnesium intake, BMD and fractures, no previous study has summarized findings in this regard. We aimed to systematically review the current evidence on this association and to perform a meta-analysis of observational studies. We searched MEDLINE, Scopus, EMBASE and Google Scholar up to January 2015 for studies that examined the relationship between magnesium intake and BMD or fracture. Studies that had reported correlation coefficients between magnesium intake and BMD or those that reported odds ratios (ORs) or relative risks (RRs) for risk of fracture in different sites were included. In total, 12 studies were included in the meta-analysis. We found that high intakes of magnesium were not significantly associated with risk of total hip fracture (summary effect size 1.92; 95 % CI 0.81, 4.55) or total fractures (1.01; 0.94-1.07). Combining four effect sizes, a positive marginally significant correlation was observed between magnesium intake and total BMD (pooled r 0.16; 95 % CI 0.001, 032). Based on nine effect sizes, we found a marginally significant association between magnesium intake and femoral neck BMD (0.14; 0.001, 0.28). However, no significant correlation was found between magnesium intake and BMD in lumbar spine (0.09; -0.01, 0.19). We found that high intakes of magnesium were not associated with increased risk of hip and total fractures. There was a positive marginally significant correlation between magnesium intake and BMD in femoral neck and total hip. No significant correlations were observed between magnesium intake and BMD in lumbar spine.
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Affiliation(s)
- M Farsinejad-Marj
- Food Security Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
- Department of Community Nutrition, School of Nutrition and Food Science, Isfahan University of Medical Sciences, Isfahan, PO Box 81745-151, Iran
| | - P Saneei
- Food Security Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
- Department of Community Nutrition, School of Nutrition and Food Science, Isfahan University of Medical Sciences, Isfahan, PO Box 81745-151, Iran
- Students' Research Committee, Isfahan University of Medical Sciences, Isfahan, Iran
| | - A Esmaillzadeh
- Food Security Research Center, Isfahan University of Medical Sciences, Isfahan, Iran.
- Department of Community Nutrition, School of Nutrition and Food Science, Isfahan University of Medical Sciences, Isfahan, PO Box 81745-151, Iran.
- Department of Community Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences, Tehran, Iran.
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18
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Hashemian M, Poustchi H, Pourshams A, Khoshnia M, Brockman JD, Hekmatdoost A, Abnet CC, Malekzadeh R. The Nail as a Biomonitor of Trace Element Status in Golestan Cohort Study. Middle East J Dig Dis 2016; 8:19-23. [PMID: 26933477 PMCID: PMC4773078 DOI: 10.15171/mejdd.2016.02] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
BACKGROUND
In the Golestan Cohort Study that was launched to investigate the causes of esophageal cancer, a complete biospecimen bank was established for storage of collected blood, urine, hair, and nail samples. The objective of this study was to evaluate the feasibility of nail samples as a biomarker of selected trace elements status.
METHODS
Thirty toenail samples were selected randomly from the participants of Golestan Cohort Study (GCS). The samples were cleaned and analyzed for selenium, mercury, chromium, iron, zinc, and scandium by instrumental neutron activation analysis at the University of Missouri Research Reactor Center. Pearson correlation coefficients were computed for selected trace elements concentration versus scandium concentration to assess terrestrial contamination.
RESULTS
The selenium, zinc, and mercury were not correlated with scandium, suggesting they were free from substantial contamination. The high correlations of scandium with iron and chromium suggest that the iron and chromium levels may be compromised by terrestrial contamination. The coefficients of variation for duplicate samples for selenium and zinc were 2.6% and 7.2%, respectively.
CONCLUSION
The nail samples from Golestan Cohort Study appears to be useable as a biomarker of selenium, zinc, and mercury and could be considered for use in future studies.
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Affiliation(s)
- Maryam Hashemian
- Department of Nutrition, Faculty of Medicine, Sabzevar University of Medical Sciences, Sabzevar, Iran ; Digestive Oncology Research Center, Digestive Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Hossein Poustchi
- Liver and Pancreatobiliary Diseases Research Center, Digestive Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Akram Pourshams
- Digestive Oncology Research Center, Digestive Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Masoud Khoshnia
- Digestive Oncology Research Center, Digestive Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran ; Azar Hospital, Golestan University of Medical Sciences, Gorgan, Iran
| | | | - Azita Hekmatdoost
- Departments of Clinical Nutrition and Dietetics, Faculty of Nutrition and Food Technology, National Nutrition and Food Technology Research Institute, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Christian C Abnet
- Nutritional Epidemiology Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute,Bethesda, MD, USA
| | - Reza Malekzadeh
- Digestive Oncology Research Center, Digestive Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran
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Li B, Liu H, Jia S. Zinc enhances bone metabolism in ovariectomized rats and exerts anabolic osteoblastic/adipocytic marrow effects ex vivo. Biol Trace Elem Res 2015; 163:202-7. [PMID: 25431298 DOI: 10.1007/s12011-014-0185-3] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/10/2014] [Accepted: 11/17/2014] [Indexed: 01/09/2023]
Abstract
Investigations of bone mass and marrow adiposity are critical for defining the role of zinc (Zn) in bone metabolism. Rats used for study were grouped as follows: control (sham), ovariectomy (OVX), ovariectomy + estradiol (OVX-E), ovariectomy + Zn treatment (OVX-Zn). Bone mineral density (BMD) was quantified (microCT); serum osteocalcin, adiponectin, RANKL, and TRAP levels were assayed (ELISA); and biochemical determinations of serum alkaline phosphatase (ALP), calcium (Ca), and phosphorus (P) were done. Cells derived from bone mesenchymal stem cell (BMSC) isolates of respective test groups were compared, identifying primary osteoblasts by MTT assay and adipocytes by Oil Red O stain. Osteocalcin and adiponectin levels in culture supernatants were determined by ELISA. Zn supplementation resulted in a modest increase in BMD, but serum osteocalcin and ALP activity increased significantly (P < 0.01, both). Serum levels of RANKL and TRAP were lower in OVX-Zn (vs OVX) rats (P < 0.01), whereas serum concentrations of adiponectin, Ca, and P did not differ by group. Osteocalcin level was significantly upregulated ex vivo (P < 0.01) in the supernatant of cultured OVX-Zn (vs OVX) cells, accompanied by a slight upturn in osteoblastic differentiation. However, Oil Red O uptake and adiponectin level in supernatant were sharply diminished in cultured OVX-Zn (vs OVX) cells (P < 0.01). Overall, we concluded that Zn contributes to bone mass by marginally stimulating differentiation and proliferation of osteoblasts and by effectively inhibiting osteoclastic and adipocytic differentiation of BMSCs.
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Affiliation(s)
- Binbin Li
- Department of Oral Pathology, Peking University School and Hospital of Stomatology, 22 Zhongguancun Avenue South, Haidian District, Beijing, 100081, People's Republic of China,
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